Surface cleaning apparatus

Abstract

A hand vacuum cleaner has a front end, a rear end, a vacuum axis extending between the front and rear ends, and an air flow path extending from a dirty air inlet to a clean air outlet. A motor and fan assembly and a cyclone assembly are provided in the air flow path. The cyclone assembly has a cyclone chamber and a dirt chamber. The cyclone chamber has an air inlet, an air outlet, a dirt outlet to the dirt chamber, and a cyclone axis. When the vacuum axis is horizontal, the cyclone axis is horizontal and extends transversely to the vacuum axis, and the cyclone chamber has a sidewall extending transversely between opposed end walls. A front end of the cyclone assembly has an openable portion which is moveably mounted between a closed position and an open position in which the cyclone chamber and the dirt chamber are opened.

Description

FIELD

[0001] This disclosure relates generally to surface cleaning apparatus. In a preferred embodiment, the surface cleaning apparatus comprises a portable surface cleaning apparatus, such as a hand vacuum cleaner.INTRODUCTION

[0002] The following is not an admission that anything discussed below is part of the prior art or part of the common general knowledge of a person skilled in the art.

[0003] Various types of surface cleaning apparatus are known, including upright surface cleaning apparatus, canister surface cleaning apparatus, stick surface cleaning apparatus, central vacuum systems, and hand carriable surface cleaning apparatus such as hand vacuums. Further, various designs for cyclonic hand vacuum cleaners, including battery operated cyclonic hand vacuum cleaners, are known in the art.SUMMARY

[0004] This summary is intended to introduce the reader to the more detailed description that follows and not to limit or define any claimed or as yet unclaimed invention. One or more inventions may reside in any combination or sub-combination of the elements or process steps disclosed in any part of this document including its claims and figures.

[0005] In accordance with one aspect of this disclosure, which may be used alone or in combination with any other aspect, a hand vacuum cleaner has a hand vacuum cleaner axis that extending centrally through the hand vacuum cleaner between the front and rear ends of the hand vacuum cleaner. The hand vacuum cleaner includes a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber. The cyclone chamber has a cyclone axis of rotation which, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally. The front end of the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position, in which the hand vacuum cleaner is operable to clean a surface, and an open position, in which the cyclone chamber and optionally the dirt collection chamber are opened. The mount is provided between the mid-line of the height of the cyclone assembly and the top of the cyclone assembly.

[0006] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0007] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0008] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0009] (c) a handle,

[0010] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0011] wherein, when the hand vacuum cleaner is oriented with the dirty air inlet provided at an upper end of the hand vacuum cleaner and the hand vacuum cleaner axis is oriented horizontally, the hand vacuum cleaner has a lower end, the cyclone chamber has a lower end, an upper end and a mid-line positioned at an elevation equidistantly between a bottom of the cyclone chamber and a top of the cyclone chamber and the dirt collection chamber has a lower end, and

[0012] wherein a front end of the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position, in which the hand vacuum cleaner is operable to clean a surface, and an open position, in which the cyclone chamber and the dirt collection chamber are opened, and the mount is provided between the mid line and the top of the cyclone chamber.

[0013] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a hand vacuum cleaner includes a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber which, as discussed with respect to the previous embodiment, has a cyclone axis of rotation that extends generally transverse to the hand vacuum cleaner axis. In accordance with this aspect, at least a portion of the dirt collection chamber is positioned below the cyclone chamber and optionally the dirt outlet from the cyclone chamber may be in a lower portion of the cyclone chamber.

[0014] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0015] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0016] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0017] (c) a handle,

[0018] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0019] wherein, when the hand vacuum cleaner is oriented with the dirty air inlet provided at an upper end of the hand vacuum cleaner and the hand vacuum cleaner axis is oriented horizontally, the hand vacuum cleaner as a lower end, the cyclone chamber has a lower end, an upper end and a mid-line positioned at an elevation equidistantly between a bottom of the cyclone chamber and a top of the cyclone chamber, the dirt collection chamber has a lower end and at least a portion of the dirt collection chamber is positioned below the cyclone chamber.

[0020] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a hand vacuum cleaner includes a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber which, as discussed with respect to a previous embodiment, has a cyclone axis of rotation that extends generally transverse to the hand vacuum cleaner axis. In accordance with this aspect, one or more of the following may be provided:

[0021] (1) The cyclone assembly may have an openable portion that is moveable mounted to the cyclone assembly by a mount provided on the cyclone and optionally a transversely extending sidewall of the cyclone.

[0022] (2) The mount may be located at or rearward of the cyclone axis of rotation.

[0023] (3) A second separation stage comprising a second stage air treatment chamber (which may be non-cyclonic or cyclonic) and a second stage dirt collection region, which may be a second stage dirt collection region that is exterior to the second stage air treatment chamber, may be provided. The second stage dirt collection region may be concurrently openable with the first stage dirt collection region. Alternately, or in addition, the second separation stage may comprise one or more cyclones in parallel which have a cyclone axis of rotation that extends generally transverse to the hand vacuum cleaner axis.

[0024] (4) The cyclone assembly has a front wall and the front wall remains in position when the openable portion is opened.

[0025] (5) The cyclone assembly comprises a sweeping arm which moves through a portion of the first stage dirt collection chamber when the openable portion is opened.

[0026] (6) The cyclone assembly may have a second openable portion. One of the openable portions may be used to empty the cyclone assembly when the cyclone assembly (or hand vacuum cleaner) is docked at a docking station. The second openable portion may not be configured for mating with a docking station and may be operable by a user to empty the cyclone assembly without using a docking station. Accordingly, the first and second openable portions may be independently openable.

[0027] (7) A vortex finder may be provided on the end of a cyclone chamber opposed to the air outlet end of the cyclone chamber (e.g., on the end wall that is opposed to and faces the air outlet of the cyclone chamber).

[0028] (8) The cyclone chamber air inlet may be located midway between the axially opposed end walls of the cyclone chamber. Accordingly, the cyclone axis of rotation may intersect the first and second opposed end walls and the cyclone air outlet may be provided in the first end wall or a cyclone air outlet may be provided in each of the first and second opposed end walls.

[0029] (9) The hand vacuum cleaner may have a finger guard with an operating component of the hand vacuum cleaner in the finger guard, such as the motor and fan assembly or an energy storage member or members.

[0030] In any embodiment, the openable portion may include a portion of a wall of the first stage dirt collection chamber and / or a portion of the sidewall of the first stage cyclone chamber.

[0031] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0032] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0033] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage, the first cyclonic stage comprising a first stage cyclone chamber and a first stage dirt collection chamber exterior to the first stage cyclone chamber, the first stage cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the first stage dirt collection chamber and a cyclone axis of rotation; and,

[0034] (c) a handle,

[0035] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0036] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber, wherein the mount is provided on the sidewall of the first stage cyclone chamber, or

[0037] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0038] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber, wherein the mount is located at or rearward of the cyclone axis of rotation, or

[0039] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0040] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber, and

[0041] wherein the cyclone assembly has a front wall and the front wall remains in position when the openable portion is opened, or

[0042] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0043] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber, and

[0044] wherein the openable portion further comprises a sweeping arm when moves through a portion of the first stage dirt collection chamber when the openable portion is opened.

[0045] In accordance with this aspect, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0046] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0047] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage and a second cyclonic stage, the first cyclonic stage comprising a first stage cyclone chamber and a first stage dirt collection chamber exterior to the first stage cyclone chamber, the first stage cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the first stage dirt collection chamber and a cyclone axis of rotation, the second cyclonic stage comprising a second stage cyclone and a second stage dirt collection chamber; and,

[0048] (c) a handle,

[0049] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0050] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber, the first stage dirt collection chamber and the second stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber.

[0051] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0052] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0053] (b) an air treatment assembly provided in the air flow path, the air treatment assembly comprising an air treatment chamber having an air treatment chamber air inlet, an air treatment chamber air outlet, an air treatment chamber axis extending between a first end wall and an axially opposed second end wall and a sidewall extending between the first and second end walls wherein, when the hand vacuum cleaner axis is oriented horizontally, the air treatment chamber axis rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, and wherein the air treatment chamber air outlet is provided in the first end wall; and,

[0054] (c) a handle,

[0055] wherein the air treatment chamber has a first openable portion and a second openable portion, each of the first and second openable portions are independently moveable by a mount between a closed position, in which the hand vacuum cleaner is operable to clean a surface, and an open position, in which the air treatment assembly is opened, and

[0056] wherein, when the hand vacuum cleaner is oriented with the dirty air inlet provided at an upper end of the hand vacuum cleaner and the hand vacuum cleaner axis is oriented horizontally, the hand vacuum cleaner has a lower end, the air treatment assembly has a lower end, an upper end and a mid-line positioned at an elevation equidistantly between a bottom of the air treatment assembly and a top of the air treatment assembly.

[0057] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0058] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0059] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0060] (c) a handle,

[0061] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0062] wherein the cyclone air outlet is provided in the first end wall, the second end wall is air impermeable and a vortex finder is provided on the second end wall.

[0063] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0064] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0065] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0066] (c) a handle,

[0067] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0068] wherein the cyclone air outlet is provided in the first end wall and the cyclone air inlet is located midway between the first and second ends.

[0069] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0070] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0071] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage and a second cyclonic stage, wherein the first cyclonic stage comprises a first stage cyclone chamber comprising a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage cyclone axis of rotation, wherein the second cyclonic stage comprises at least one second stage cyclone chamber comprising a second stage cyclone air inlet, a second stage cyclone air outlet and a second stage cyclone axis of rotation, and wherein the first stage cyclone axis of rotation extends in a common direction with the second stage cyclone axis of rotation; and,

[0072] (c) a handle,

[0073] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls.

[0074] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0075] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0076] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber comprising a cyclone axis of rotation wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall, a cyclone sidewall extending transversely between the first and second end wall;

[0077] (c) a handle; and,

[0078] (d) a finger guard positioned forward of the handle, wherein the motor and fan assembly is at least partially located in the finger guard

[0079] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, an upright vacuum cleaner has a cyclone assembly which comprises one cyclone (or a plurality of cyclone chambers) having a cyclone axis of rotation that extends transverse to a forward / rearward axis extending centrally through the surface cleaning head and generally horizontally when the upright section is in the upright storage position. The cyclone assembly may have any design discussed herein. For example, the cyclone assembly may have one or more of the following:

[0080] (1) The cyclone chamber may have two axially opposed air outlets and / or a cyclone air inlet located at an axially located mid-point between the axially opposed end walls of the cyclone chamber.

[0081] (2) A pre-motor filter may be positioned below one or both of the cyclone chamber and a dirt collection chamber that is exterior to the cyclone chamber, and above the motor and fan assembly.

[0082] (3) The cyclone may have a plurality of cyclone air inlets. The cyclone air inlet may be at one axially opposed end of the cyclone chamber and a cyclone air outlet may be at the axially opposed end wall. Alternately, the cyclone air inlet may be located at a midpoint between the axially opposed end walls and a cyclone air outlet may be provided at each axially opposed ends.

[0083] In accordance with this aspect of this disclosure, there is provided an upright vacuum cleaner comprising:

[0084] (a) a surface cleaning head having a front end, a rear end, a lower side having a dirty air inlet, an upper side and first and second transversely opposed sides, each of the transversely opposed sides extending between the front and rear ends;

[0085] (b) an upright section moveably mounted to the surface cleaning head between an upright storage position and a rearwardly inclined floor cleaning position;

[0086] (c) an air flow path extending from the dirty air inlet to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0087] (d) a cyclone assembly provided on the upright section, the cyclone assembly comprising a cyclone chamber comprising a cyclone air inlet, a first end wall having a first cyclone air outlet, a transversely opposed second end wall having a second cyclone air outlet, a cyclone sidewall extending transversely between the first and second end walls and a transversely extending cyclone axis of rotation.

[0088] In accordance with another this of this disclosure, there is also provided an upright vacuum cleaner comprising:

[0089] (a) a surface cleaning head having a front end, a rear end, a lower side having a dirty air inlet, an upper side and first and second transversely opposed sides, each of the transversely opposed sides extending between the front and rear ends;

[0090] (b) an upright section moveably mounted to the surface cleaning head between an upright storage position and a rearwardly inclined floor cleaning position;

[0091] (c) an air flow path extending from the dirty air inlet to a clean air outlet with a motor and fan assembly provided in the air flow path, the motor and fan assembly is provided on the upright section;

[0092] (d) a cyclone assembly provided on the upright section, the cyclone assembly comprising a cyclone chamber comprising a cyclone air inlet, a first end wall having a first cyclone air outlet, a transversely opposed second end wall, a cyclone sidewall extending transversely between the first and second end walls, a transversely extending cyclone axis of rotation, and a dirt outlet that is in communication with a dirt collection chamber that is exterior to the cyclone chamber wherein, when the upright section is in the storage position, the dirt collection chamber is positioned below the cyclone chamber; and,

[0093] (e) a pre-motor filter cyclone assembly provided on the upright section wherein, when the upright section is in the storage position, the pre-motor filter is positioned below the dirt collection chamber and above the motor and fan assembly.

[0094] In accordance with this aspect, there is also provided a surface cleaning apparatus which, in use to clean a floor, has a front end, a rear end and a surface cleaning apparatus axis extending centrally between the front and rear ends, the surface cleaning apparatus comprising:

[0095] (a) an air flow path extending from a dirty air inlet, which is provided at the front end, to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0096] (b) a cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone axis of rotation, a plurality of cyclone air inlets, a first end wall having a first cyclone air outlet, an opposed second end wall, a cyclone sidewall extending between the first and second end walls, and a dirt outlet that is in communication with a dirt collection chamber that is exterior to the cyclone chamber wherein the cyclone axis of rotation extends transversely to the surface cleaning apparatus axis and wherein, when the surface cleaning apparatus is in use to clean a floor, the cyclone axis of rotation extends horizontally,

[0097] wherein an annular header extends around the cyclone sidewall and the plurality of cyclone air inlets extends from the annular header to the cyclone chamber.

[0098] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, an appliance such as a surface cleaning apparatus or an air filtration apparatus (e.g., an air cleaner), has a cyclone chamber with a plurality of air inlets wherein the air flow path to at least one of the air inlets includes a porous member, such as a screen, to limit the size of dirt particles what may travel through the air flow path to the air inlet. For example, a cyclone chamber may have a first air flow path extending to a first cyclone air inlet and a second flow path branching off of the first air flow path to a second cyclone air inlet and a screen may be provided adjacent the location at which the second air flow path branches off from the first air flow path. It will be appreciated that a third (or more) cyclone air inlet(s) may be provided any one or more of which may branch off of the first air flow path and / or the second air flow path and may include a porous member to further limit the size of dirt particles travelling to the third (or more) cyclone air inlet(s).

[0099] In accordance with this aspect, there is provided which, in use to clean a floor, has a front end, a rear end and a surface cleaning apparatus axis extending centrally between the front and rear ends, the surface cleaning apparatus comprising:

[0100] (a) an air flow path extending from a dirty air inlet, which is provided at the front end, to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0101] (b) a cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone axis of rotation, a cyclone air inlet, a first end wall having a first cyclone air outlet, an opposed second end wall, a cyclone sidewall extending between the first and second end walls,

[0102] wherein the cyclone air inlet comprises a first channel extending from a first channel inlet end to a first channel outlet end that is provided at a location at which air exits the first channel and enters the cyclone chamber, and a second channel extending from a second channel inlet end to a second channel outlet end that is provided at a location at which air exits the second channel and enters the cyclone chamber, wherein a porous member is provided between a portion of the first channel and a portion of second channel whereby, in operation some air travelling through the first channel passes through the porous member into the second channel.

[0103] In accordance with this aspect, there is also provided a surface cleaning apparatus which, in use to clean a floor, has a front end, a rear end and a surface cleaning apparatus axis extending centrally between the front and rear ends, the surface cleaning apparatus comprising:

[0104] (a) an air flow path extending from a dirty air inlet, which is provided at the front end, to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0105] (b) a cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone axis of rotation, a cyclone air inlet, a first end wall having a first cyclone air outlet, an opposed second end wall, a cyclone sidewall extending between the first and second end walls, wherein the cyclone air inlet comprises:

[0106] (i) an upstream portion that extends axially though the cyclone chamber;

[0107] (ii) a first channel extending from a first channel inlet end to a first channel outlet end that is provided at a location at which air exits the first channel and enters the cyclone chamber; and,

[0108] (iii) a second channel extending from a second channel inlet end to a second channel outlet end that is provided at a location at which air exits the second channel and enters the cyclone chamber,

[0109] wherein each of the first and second channels comprise a tangential air inlet that is located at an outlet end of the upstream portion, and

[0110] wherein the second channel inlet end comprises a porous member whereby, in operation some air travelling through the cyclone air inlet passes through the porous member into the second channel.

[0111] In accordance with this aspect, there is also provided a surface cleaning apparatus which, in use to clean a floor, has a front end, a rear end and a surface cleaning apparatus axis extending centrally between the front and rear ends, the surface cleaning apparatus comprising:

[0112] (a) an air flow path extending from a dirty air inlet, which is provided at the front end, to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0113] (b) a cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone axis of rotation, a cyclone air inlet, a first end wall having a first cyclone air outlet, an opposed second end wall, a cyclone sidewall extending between the first and second end walls,

[0114] wherein the cyclone air inlet comprises a first channel extending from a first channel inlet end to a first channel outlet end that is provided at a location at which air exits the first channel and enters the cyclone chamber, and a porous section of the cyclone sidewall whereby, in operation some air travelling through the cyclone air inlet passes through the porous member into the cyclone chamber

[0115] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus, such as a hand vacuum cleaner, comprises a first cyclonic stage comprising one or more first stage cyclones in parallel and a second cyclonic stage downstream from the first cyclonic stage wherein the second cyclonic stage comprises one or more second stage cyclones in parallel and the cyclone axis of rotation of the second stage cyclone(s) extends generally perpendicular to the cyclone axis of rotation of the first stage cyclone(s). Accordingly, for example, a hand vacuum cleaner may have a first stage cyclone having a cyclone axis of rotation that extends generally vertically when the hand vacuum cleaner inlet conduit extends horizontally and the cyclone axis of rotation of the second stage cyclone(s) may extend generally transverse or generally horizontally.

[0116] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0117] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0118] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage and a second cyclonic stage, wherein the first cyclonic stage comprises a first stage cyclone chamber comprising a first stage cyclone air inlet, a first stage cyclone air outlet, a first stage cyclone axis of rotation extending between first and second end walls and a cyclone sidewall extends between the first and second end walls, wherein the second cyclonic stage comprises at least one second stage cyclone chamber comprising a second stage cyclone air inlet, a second stage cyclone air outlet and a second stage cyclone axis of rotation; and,

[0119] (c) a handle,

[0120] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally vertically and the second stage cyclone axis of rotation is oriented generally horizontally and extends in a common direction with the hand vacuum cleaner axis.

[0121] In accordance with this aspect, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0122] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0123] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage and a second cyclonic stage, wherein the first cyclonic stage comprises a first stage cyclone chamber comprising a first stage cyclone air inlet, a first stage cyclone air outlet, a first stage cyclone axis of rotation extending between first and second end walls and a cyclone sidewall extends between the first and second end walls, wherein the second cyclonic stage comprises at least one second stage cyclone chamber comprising a second stage cyclone air inlet, a second stage cyclone air outlet and a second stage cyclone axis of rotation; and,

[0124] (c) a handle,

[0125] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally vertically and the second stage cyclone axis of rotation is oriented generally horizontally and extends in a direction transverse to the hand vacuum cleaner axis, or

[0126] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally vertically and the second stage cyclone axis of rotation is oriented generally horizontally and extends in a direction transverse to the hand vacuum cleaner axis, or

[0127] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0128] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the second stage dirt collection chamber are opened.

[0129] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus, such as a hand vacuum cleaner, has two or more first stage cyclones in parallel wherein each of the first stage cyclones has a cyclone axis of rotation that extends generally transversely. The first stage cyclone may be positioned one partially or fully above the other (e.g., vertically stacked) and / or one partially or fully rearward of the other.

[0130] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0131] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0132] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage comprising two first stage cyclone chambers, each first stage cyclone chamber comprising a first stage cyclone air inlet, a first stage cyclone air outlet, a first stage cyclone axis of rotation extending between first and second end walls and a cyclone sidewall extends between the first and second end walls; and,

[0133] (c) a handle,

[0134] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axes of rotation are oriented generally horizontally and extend generally transverse to the hand vacuum cleaner axis

[0135] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a cyclone for a surface cleaning apparatus has an air flow channel that extends downstream from the cyclone air outlet wherein the cross-sectional area in a direction transverse to the direction of flow through the air flow channel increases in the downstream direction. This increase in cross-sectional area may be provided by the cyclone chamber (which comprises an inner wall of the air flow channel) decreasing in diameter in the downstream direction and / or an outer wall of the surface cleaning apparatus (which comprises an outer wall of the air flow channel) increasing in diameter in the downstream direction.

[0136] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0137] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0138] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first stage cyclone chamber, the first stage cyclone chamber comprising a first end wall, an opposed second end wall, a cyclone axis of rotation extending between the first and second end walls, a cyclone sidewall extending between the first and second end walls, a cyclone air inlet and a first cyclone air outlet provided in the first end wall;

[0139] (c) a first air flow passage that extends rearwardly from the first stage cyclone air outlet wherein, in operation, air travels in a first direction of flow through the first air flow passage, the first air flow passage has a first cross-sectional flow area in a plane transverse to the first direction of flow and the first cross-sectional flow area increases in the downstream direction; and,

[0140] (d) a handle,

[0141] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner

[0142] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus which is dockable with a docking station, such as wherein the air treatment assembly is dockable with a docking station while the air treatment assembly is attached as part of the surface cleaning apparatus or when the air treatment assembly has been removed from the surface cleaning apparatus, has two or more openable portions (e.g., doors) that are openable to enable dirt to be transferred from the air treatment assembly to the docking station. Each openable portion may open concurrently and may be concurrently unlocked when docked at the docking station. For example, a single abutment member may engage a drive member that is drivingly connected to the locking mechanism for each openable portion. Alternately, each locking mechanism may be engaged by a different abutment member provided on the docking station. It will be appreciated that that docking station may have a single inlet to which each of the openable portions mate when docked or each openable portion may mate with a different inlet of the docking station.

[0143] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0144] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path, wherein the dirty air inlet comprises an inlet conduit that extends rearwardly;

[0145] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet and a cyclone axis of rotation; and,

[0146] (c) a handle,

[0147] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0148] wherein the dirty air inlet is provided midway between the first and second end walls, and

[0149] wherein the cyclone assembly has first and second openable portions.

[0150] In accordance with this aspect, there is provided also a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0151] (a) an air flow path extending from a dirty air inlet provided at the front end of the surface cleaning apparatus to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0152] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a second cyclone air outlet and a cyclone axis of rotation; and,

[0153] (c) a handle,

[0154] wherein the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall and a cyclone sidewall extending between the first and second end walls, wherein the first cyclone air outlet is provided in the first end wall and the second cyclone air outlet is provided in the second end wall, and wherein the cyclone air inlet is provided in the cyclone sidewall midway between the first and second end walls,

[0155] wherein the cyclone assembly has first and second openable portions

[0156] In accordance with this aspect, there is provided also a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0157] (a) an air flow path extending from a dirty air inlet provided at the front end of the surface cleaning apparatus to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0158] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet and a cyclone axis of rotation that extends generally transverse to the surface cleaning apparatus axis; and,

[0159] (c) a handle,

[0160] wherein the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall and a cyclone sidewall extending between the first and second end walls, wherein the first cyclone air outlet is provided in the first end wall, and wherein the cyclone air inlet is provided in the cyclone sidewall midway between the first and second end walls, and

[0161] wherein the cyclone assembly has first and second openable portions

[0162] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus which is dockable with a docking station, such as wherein the air treatment assembly is dockable with a docking station while the air treatment assembly is attached as part of the surface cleaning apparatus or when the air treatment assembly has been removed from the surface cleaning apparatus, has a recess provided in the dirt collection region (e.g., a dirt collection chamber that is exterior to an air treatment chamber such as a cyclone chamber) through which dirt travels during an emptying mode of operation as it travels to the air treatment member of a docking station. It will be appreciated that the dirt may travel through a passage that is located in the recess that is part of the surface cleaning apparatus or which is part of the docking station.

[0163] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0164] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path, wherein the dirty air inlet comprises an inlet conduit that extends rearwardly;

[0165] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0166] (c) a handle,

[0167] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall, a cyclone sidewall extending transversely between the first and second end walls, and

[0168] wherein a portion of the dirt collection chamber is positioned forward of the cyclone chamber and the cyclone air inlet extends rearward past the portion of the dirt collection chamber to the cyclone air inlet.

[0169] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a docking station for a surface cleaning apparatus having a cyclone chamber with a cyclone axis of rotation that extends transversely as discussed previously, has an inlet wherein the longer dimension of the inlet extends transversely (e.g., generally horizontally and perpendicular to an axis extending centrally through a docking station from the front of the docking station to the rear of the docking station. Accordingly, the inlet may be generally rectangular with the long dimension of the inlet extending transversely.

[0170] In accordance with this aspect, there is provided an assembly comprising a hand vacuum cleaner and a docking station for the hand vacuum cleaner:

[0171] (a) the hand vacuum cleaner comprising having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0172] (i) a hand vacuum cleaner air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path, wherein the dirty air inlet is provided at an upper end of the hand vacuum cleaner;

[0173] (ii) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a front end having an openable front wall and a cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet and a cyclone axis of rotation; and,

[0174] (iii) a handle,

[0175] (b) the docking station comprising a docking station air flow path from a docking station air inlet to a docking station air outlet with an air treatment member provided in the docking station air flow path,

[0176] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall, a cyclone sidewall extending transversely between the first and second end walls, and

[0177] wherein the hand vacuum cleaner has first and second transversely opposed sides, and a transverse length between the first and second transversely opposed sides, and

[0178] wherein, when the hand vacuum cleaner is docked at the docking station, the upper end of the hand vacuum cleaner faces forwardly, the front end of the hand vacuum cleaner seats on the docking station air inlet and the docking station has a transverse width, in a direction of the cyclone axis of rotation, that is essentially the same as the transverse length of the hand vacuum cleaner.

[0179] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus, such as a hand vacuum cleaner, may have two or more user interfaces. Each user interface may display the same information and / or provide the same control actuators. Alternately, each interface may display different information and / or have control actuators that are operable to control different operations of the surface cleaning apparatus. Alternately, some of the user interfaces may display some different information and some of the same information and / or have control actuators that are operable to control different operations of the surface cleaning apparatus and also some of the same operations of the surface cleaning apparatus. The user interfaces may be provided at various locations such as one or more may be provided on the handle, the battery pack, the main body and the air treatment assembly.

[0180] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end, an upper end, a lower end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0181] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet;

[0182] (b) an air treatment assembly provided in the air flow path;

[0183] (c) a motor and fan assembly provided in the air flow path;

[0184] (d) a handle having a hand grip portion;

[0185] (e) a first user interface provided on the upper end of the hand vacuum cleaner; and,

[0186] (f) a second user interface provided on a rear side of the handle.

[0187] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a hand vacuum cleaner may have a plurality of energy storage members, such as batteries or capacitors, which may be provided in an energy storage pack, such as a battery pack and which may be removable, wherein some or all of the energy storage members have a long dimension which extends transverse to the axis of the hand vacuum cleaner inlet conduit and in the same plane as the axis of the hand vacuum cleaner inlet conduit and others may have a long dimension that extends in a different direction, e.g., vertically when the axis of the inlet conduit extends horizontally or horizontally when the axis of the inlet conduit extends horizontally.

[0188] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end, an upper end, a lower end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0189] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet;

[0190] (b) an air treatment assembly provided in the air flow path;

[0191] (c) a motor and fan assembly provided in the air flow path;

[0192] (d) a handle having a hand grip portion; and,

[0193] (e) in operation, a battery pack, the battery pack housing a first set of batteries and a second set of batteries, the first set of batteries comprising at least one first battery having a first long axis and the second set of batteries comprising at least one second battery having a second long axis, wherein the first and second long axes extend at a non-zero angle to each other

[0194] These and other aspects and features of various embodiments will be described in greater detail below.BRIEF DESCRIPTION OF THE DRAWINGS

[0195] For a better understanding of the described embodiments and to show more clearly how they may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:

[0196] FIG. 1 is a perspective view of an example hand vacuum, in accordance with an embodiment;

[0197] FIG. 2 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2;

[0198] FIG. 3 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3;

[0199] FIG. 4 is a perspective cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3;

[0200] FIG. 5 is a perspective view of the hand vacuum of FIG. 1 attached to a wand;

[0201] FIG. 6 is a perspective view of the hand vacuum of FIG. 1 attached to the wand and a surface cleaning head;

[0202] FIG. 7 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an example lower air inlet cyclone chamber;

[0203] FIG. 8 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an example multi-air inlet cyclone chamber;

[0204] FIG. 9 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example multi-air inlet cyclone chamber;

[0205] FIG. 10 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example multi-air inlet cyclone chamber;

[0206] FIG. 11 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example multi-air inlet cyclone chamber;

[0207] FIG. 12 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example multi-air inlet cyclone chamber;

[0208] FIG. 13A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an example bypass air inlet cyclone chamber;

[0209] FIG. 13B is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example bypass air inlet cyclone chamber;

[0210] FIG. 14 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having cyclone chamber with a flat rear end;

[0211] FIG. 15A is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a dirt collection chamber below the cyclone chamber and in a closed position;

[0212] FIG. 15B is a perspective side cross-sectional view of the hand vacuum of FIG. 15A with the dirt collection chamber in an open position;

[0213] FIG. 16A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a dirt collection chamber forward of the cyclone chamber and in a closed position;

[0214] FIG. 16B is a side cross-sectional view of the hand vacuum of FIG. 16A with the dirt collection chamber in an open position;

[0215] FIG. 17 is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a first rotationally mounted door in an open position;

[0216] FIG. 18A is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a second rotationally mounted door in an open position;

[0217] FIG. 18B is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an alternate second rotationally mounted door in an open position;

[0218] FIG. 18C is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another alternate second rotationally mounted door;

[0219] FIG. 19 is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a third rotationally mounted door;

[0220] FIG. 20A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having first and second rotationally mounted doors in a closed position;

[0221] FIG. 20B is a side cross-sectional view of the hand vacuum of FIG. 20A when docked at a docking station and with the first and second rotationally mounted doors in an open position;

[0222] FIG. 20C is a side cross-sectional view of an alternate version of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having first and second rotationally mounted doors in a closed position;

[0223] FIG. 20D is a side cross-sectional view of the hand vacuum of FIG. 20C when docked at a docking station and with the first and second rotationally mounted doors in an open position;

[0224] FIG. 21A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having first and second translatably mounted doors in an open position;

[0225] FIG. 21B is a side cross-sectional view of the hand vacuum of FIG. 21A with the second translatably mounted door in the open position;

[0226] FIG. 22 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having an example uniflow cyclone chamber;

[0227] FIG. 23 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having an example inverted cyclone chamber;

[0228] FIG. 24 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having an example split flow cyclone chamber with dual air outlets;

[0229] FIG. 25 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having another example split flow cyclone chamber;

[0230] FIG. 26 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having another example split flow cyclone chamber;

[0231] FIG. 27 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having an example hybrid cyclone chamber;

[0232] FIG. 28 is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an example second cleaning stage;

[0233] FIG. 29A is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example second cleaning stage;

[0234] FIG. 29B is a front cross-sectional view of the hand vacuum of FIG. 1 taken along line 29-29, with the hand vacuum having the example second cleaning stage of FIG. 28A;

[0235] FIG. 30 is a front cross-sectional view of the hand vacuum of FIG. 1 taken along line 30-30, with the hand vacuum having another example second cleaning stage;

[0236] FIG. 31 is a front cross-sectional view of the hand vacuum of FIG. 1 taken along line 30-30, with the hand vacuum having another example second cleaning stage;

[0237] FIG. 32 is a side perspective view of another example hand vacuum cleaner, in accordance with an embodiment;

[0238] FIG. 33A is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 33-33, with the hand vacuum having a rotationally mounted door in an open position;

[0239] FIG. 33B is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 33-33, with the hand vacuum having another rotationally mounted door in an open position;

[0240] FIG. 34 is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 34-34, with the hand vacuum having a trapezoidal cyclone chamber;

[0241] FIG. 35A is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 34-34, with the hand vacuum having two motors;

[0242] FIG. 35B is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 34-34, with the hand vacuum having two fans;

[0243] FIG. 36 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a pre-motor filter below the cyclone chamber;

[0244] FIG. 37 is a perspective rear cross-sectional view of the hand vacuum of FIG. 1 taken along line 37-37, with the hand vacuum having a pre-motor filter below the cyclone chamber;

[0245] FIGS. 38-47 are side cross-sectional views of the hand vacuum of FIG. 1 taken along line 2-2, showing various layouts of the pre-motor filter, suction motor, energy storage member(s), post-motor filter, and handle;

[0246] FIG. 48 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the cyclone chamber having a variable radius;

[0247] FIG. 49A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 30-30, with the variable radius cyclone chamber being bowtie-shaped;

[0248] FIG. 49B is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 30-30, with the variable radius cyclone chamber being frusto-conical;

[0249] FIG. 50 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0250] FIG. 51 is a front cross-sectional view of the hand vacuum of FIG. 50 taken along line 51-51;

[0251] FIG. 52 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a first rotationally mounted door in an open position;

[0252] FIG. 53 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a second rotationally mounted door in an open position;

[0253] FIG. 54 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0254] FIG. 55 is a side cross-sectional view of the hand vacuum of FIG. 54 taken along line 55-55;

[0255] FIG. 56 is a top cross-sectional view of the hand vacuum of FIG. 54 taken along line 56-56;

[0256] FIG. 57 is a perspective side cross-sectional view of the hand vacuum of FIG. 54 taken along line 55-55, with the hand vacuum having a first rotationally mounted door in an open position;

[0257] FIG. 58 is a perspective side cross-sectional view of the hand vacuum of FIG. 54 taken along line 55-55, with the hand vacuum having a second rotationally mounted door in an open position;

[0258] FIG. 59 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0259] FIG. 60 is a side cross-sectional view of the hand vacuum of FIG. 59 taken along line 60-60;

[0260] FIG. 61 is a top cross-sectional view of the hand vacuum of FIG. 59 taken along line 61-61;

[0261] line 62-62;

[0262] FIG. 62 is a top cross-sectional view of the hand vacuum of FIG. 59 taken along

[0263] FIG. 63 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0264] FIG. 64 is a side cross-sectional view of the hand vacuum of FIG. 63 taken along line 64-64;

[0265] FIG. 65 is a partial top cross-sectional view of the hand vacuum of FIG. 63 taken along line 65-65;

[0266] FIG. 66 is a front cross-sectional view of the hand vacuum of FIG. 50 taken along line 66-66;

[0267] FIG. 67 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a first rotationally mounted door in an open position;

[0268] FIG. 68 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a second rotationally mounted door in an open position;

[0269] FIG. 69 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a third rotationally mounted door in an open position;

[0270] FIG. 70 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0271] FIG. 71 is a front cross-sectional view of the hand vacuum of FIG. 70 taken along line 71-71;

[0272] FIG. 72 is a side cross-sectional view of the hand vacuum of FIG. 70 taken along line 72-72;

[0273] FIG. 73 is a perspective side cross-sectional view of the hand vacuum of FIG. 70 taken along line 72-72, with the hand vacuum having a rotationally mounted door in an open position;

[0274] FIG. 74 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0275] FIG. 75 is a perspective side cross-sectional view of the hand vacuum of FIG. 74 taken along line 75-75, with the hand vacuum having a rotationally mounted door in an open position;

[0276] FIG. 76 is a top cross-sectional view of the hand vacuum of FIG. 74 taken along line 76-76;

[0277] FIG. 77A is a front cross-sectional view of the hand vacuum of FIG. 74 taken along line 77-77, with the hand vacuum having a first bypass air inlet configuration;

[0278] FIG. 77B is a front cross-sectional view of the hand vacuum of FIG. 74 taken along line 77-77, with the hand vacuum having another bypass air inlet configuration;

[0279] FIG. 78 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0280] FIG. 79 is a perspective side cross-sectional view of the hand vacuum of FIG. 78 taken along line 79-79;

[0281] FIG. 80 is a top cross-sectional view of the hand vacuum of FIG. 79 taken along line 80-80 in FIG. 78;

[0282] FIG. 81 is a perspective side cross-sectional view of the hand vacuum of FIG. 78 taken along line 79-79, with the hand vacuum having a rotationally mounted door in an open position;

[0283] FIG. 82 is a top cross-sectional view of the hand vacuum of FIG. 81 taken along line 80-80 in FIG. 78;

[0284] FIG. 83 is a side perspective view of the hand vacuum of FIG. 1 docked to a docking station;

[0285] FIG. 84 is a perspective side cross-sectional view taken along line 84-84 in FIG. 83, with the wand and surface cleaning head omitted;

[0286] FIG. 85 is a perspective view of the hand vacuum of FIG. 1 positioned above the docking station inlet;

[0287] FIG. 86A is a side cross-sectional view of the hand vacuum of FIG. 1 docking to another docking station;

[0288] FIG. 86B is a side cross-sectional view of the hand vacuum of FIG. 1 docked to the docking station of FIG. 86A;

[0289] FIG. 87 is a front cross-sectional view of the hand vacuum of FIG. 1 docked to the docking station of FIG. 86A;

[0290] FIG. 88 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0291] FIG. 89 is a side cross-sectional view of the hand vacuum of FIG. 88 taken along line 89-89, with the hand vacuum docked to a docking station;

[0292] FIG. 90 is a side cross-sectional view of the hand vacuum of FIG. 88 taken along line 90-90, with the hand vacuum docked to the docking station;

[0293] FIG. 91 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0294] FIG. 92 is a partial side cross-sectional view of the hand vacuum of FIG. 91 taken along line 92-92, with a first rotationally mounted door in an open position;

[0295] FIG. 93 is a side cross-sectional view of the hand vacuum of FIG. 91 taken along line 92-92, with a second rotationally mounted door in an open position and docked to a docking station;

[0296] FIG. 94 is a side cross-sectional view of the hand vacuum of FIG. 91 taken along line 94-94, with a third rotationally mounted door in an open position and docked to the docking station;

[0297] FIG. 95 is a front perspective view of an example upright vacuum, in accordance with an embodiment;

[0298] FIG. 96 is a rear perspective view of the upright vacuum of FIG. 95;

[0299] FIG. 97 is a side perspective view of the upright vacuum of FIG. 95, with an air treatment assembly removed for emptying;

[0300] FIG. 98 is a side cross-sectional view of the upright vacuum of FIG. 95 taken along line 98-98;

[0301] FIG. 99 is a perspective side cross-sectional view of the upright vacuum of FIG. 95 taken along line 98-98, with the air treatment assembly removed;

[0302] FIG. 100 is a front perspective view of another example upright vacuum, in accordance with an embodiment;

[0303] FIG. 101 is a rear perspective view of the upright vacuum of FIG. 100;

[0304] FIG. 102 is a side perspective view of the upright vacuum of FIG. 100, with an air treatment assembly removed for emptying;

[0305] FIG. 103 is a side cross-sectional view of the upright vacuum of FIG. 100 taken along line 103-103;

[0306] FIG. 104 is a perspective side cross-sectional view of the upright vacuum of FIG. 100 taken along line 103-103, with the air treatment assembly removed;

[0307] FIG. 105 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0308] FIG. 106 is a perspective side cross-sectional view of the hand vacuum of FIG. 105 taken along line 106-106, with the hand vacuum having dual first stage cyclone chambers;

[0309] FIG. 107 is a perspective side cross-sectional view of the hand vacuum of FIG. 105 taken along line 106-106, with first and second rotationally mounted doors in an open position;

[0310] FIG. 108 is a front perspective view of another example upright vacuum, in accordance with an embodiment;

[0311] FIG. 109 is an enlarged perspective side cross-sectional view of the upright vacuum of FIG. 108 taken along line 109-109;

[0312] FIG. 110 is a side cross-sectional view of the upright vacuum of FIG. 108 taken along line 109-109, with an air treatment assembly removed;

[0313] FIG. 111 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0314] FIG. 112 is a front cross-sectional view of the hand vacuum of FIG. 111 taken along line 112-112;

[0315] FIG. 113A is a side cross-sectional view of the hand vacuum of FIG. 111 taken along line 113-113, with a rotationally mounted door in an open position;

[0316] FIG. 113B is a side cross-sectional view of the hand vacuum of FIG. 111 taken along line 113-113, with another rotationally mounted door in an open position;

[0317] FIG. 114 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0318] FIG. 115 is a front cross-sectional view of the hand vacuum of FIG. 114 taken along line 115-115;

[0319] FIG. 116 is a partial perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having a first rotationally mounted door in an open position;

[0320] FIG. 117A is a perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having a second rotationally mounted door in an open position;

[0321] FIG. 117B is a perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having a third rotationally mounted door in an open position;

[0322] FIG. 118 is a side view of another example hand vacuum, in accordance with an embodiment;

[0323] FIG. 119 is a side cross-sectional view of the hand vacuum of FIG. 118;

[0324] FIG. 120 is a side cross-sectional view of the hand vacuum of FIG. 118, with first and second rotationally mounted doors in an open position;

[0325] FIG. 121 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having an alternate rotationally mounted door in a closed position;

[0326] FIG. 122 is a front cross-sectional view of the hand vacuum of FIG. 121 taken along line 122-122 of FIG. 118;

[0327] FIG. 123 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having the alternate rotationally mounted door in an open position;

[0328] FIG. 124 is a front cross-sectional view of the hand vacuum of FIG. 123 taken along line 122-122 of FIG. 118;

[0329] FIG. 125 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having an alternate main body;

[0330] FIG. 126 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having another alternate rotationally mounted door in an open position;

[0331] FIG. 127 is an exploded partial side cross-sectional view of the air treatment assembly of the hand vacuum of FIG. 126;

[0332] FIG. 128 is a front cross-sectional view of the hand vacuum of FIG. 126 taken along line 122-122 of FIG. 118, with the alternate rotationally mounted door in a closed position;

[0333] FIG. 129 is a front cross-sectional view of the hand vacuum of FIG. 126 taken along line 122-122 of FIG. 118, with the alternate rotationally mounted door in the open position;

[0334] FIG. 130 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having alternate first and second rotationally mounted doors in an open position;

[0335] FIG. 131 is an enlarged partial side cross-sectional view of the air treatment assembly of the hand vacuum of FIG. 130;

[0336] FIG. 132 is a perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having first and second rotationally mounted doors in an open position;

[0337] FIG. 133 is a front cross-sectional view of the hand vacuum of FIG. 114 taken along line 115-115;

[0338] FIG. 134 is a partial perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having a third rotationally mounted door in an open position;

[0339] FIG. 135 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0340] FIG. 136 is a perspective side cross-sectional view of the hand vacuum of FIG. 135 taken along line 136-136, with the hand vacuum having dual first stage cyclone chambers;

[0341] FIG. 137 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0342] FIG. 138 is a side cross-sectional view of the hand vacuum of FIG. 137 taken along line 138-138, with the hand vacuum docked to a docking station;

[0343] FIG. 139 is a side cross-sectional view of the hand vacuum of FIG. 137 taken along line 139-139, with the hand vacuum docked to the docking station;

[0344] FIG. 140 is a perspective view of another example hand vacuum, in accordance with an embodiment, docking to a docking station;

[0345] FIG. 141 is a side cross-sectional view of the hand vacuum of FIG. 140 taken along line 141-141, with the hand vacuum docked to the docking station;

[0346] FIG. 142 is a side cross-sectional view of the hand vacuum of FIG. 140 taken along line 141-141;

[0347] FIG. 143 is a side cross-sectional view of the hand vacuum of FIG. 140 taken along line 141-141, with the hand vacuum having a rotationally mounted door in an open position;

[0348] FIG. 144 is a side cross-sectional view of an alternate version of the hand vacuum of FIG. 140 taken along line 141-141, with the hand vacuum having a first rotationally mounted door in an open position; and,

[0349] FIG. 145 is a side cross-sectional view of the alternate version of the hand vacuum of FIG. 144 taken along line 141-141 in FIG. 140, with the hand vacuum having the first rotationally mounted door and a second rotationally mounted door in an open position.US_DESCRIPTION_OF_EMBODIMENTS

[0350] The drawings included herewith are for illustrating various examples of articles, methods, and apparatuses of the teaching of the present specification and are not intended to limit the scope of what is taught in any way.DESCRIPTION OF VARIOUS EMBODIMENTS

[0351] Various apparatus, methods and compositions are described below to provide an example of an embodiment of each claimed invention. No embodiment described below limits any claimed invention and any claimed invention may cover apparatuses and methods that differ from those described below. The claimed inventions are not limited to apparatus, methods and compositions having all of the features of any one apparatus, method or composition described below or to features common to multiple or all of the apparatus, methods or compositions described below. It is possible that an apparatus, method or composition described below is not an embodiment of any claimed invention. Any invention disclosed in an apparatus, method or composition described below that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicant(s), inventor(s) and / or owner(s) do not intend to abandon, disclaim, or dedicate to the public any such invention by its disclosure in this document.

[0352] The terms “an embodiment”, “embodiment”, “embodiments”, “the embodiment”, “the embodiments”, “one or more embodiments,”“some embodiments”, and “one embodiment” mean “one or more (but not all) embodiments of the present invention(s)”, unless expressly specified otherwise.

[0353] The terms “including”, “comprising”, and variations thereof mean “including but not limited to”, unless expressly specified otherwise. A listing of items does not imply that any or all of the items are mutually exclusive, unless expressly specified otherwise. The terms “a”, “an”, and “the” mean “one or more”, unless expressly specified otherwise.

[0354] As used herein and in the claims, two or more parts are said to be “coupled”, “connected”, “attached”, or “fastened” where the parts are joined or operate together either directly or indirectly (i.e., through one or more intermediate parts), so long as a link occurs. As used herein and in the claims, two or more parts are said to be “directly coupled”, “directly connected”, “directly attached”, or “directly fastened” where the parts are connected in physical contact with each other. None of the terms “coupled”, “connected”, “attached”, and “fastened” distinguish the manner in which two or more parts are joined together.

[0355] Furthermore, it will be appreciated that for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the example embodiments described herein. However, it will be understood by those of ordinary skill in the art that the example embodiments described herein may be practiced without these specific details. In other instances, well-known methods, procedures, and components have not been described in detail so as not to obscure the example embodiments described herein. Also, the description is not to be considered as limiting the scope of the example embodiments described herein.

[0356] As used herein, the wording “and / or” is intended to represent an inclusive-or. That is, “X and / or Y” is intended to mean X or Y or both, for example. As a further example, “X, Y, and / or Z” is intended to mean X or Y or Z or any combination thereof.

[0357] As used herein and in the claims, two elements are said to be “parallel” where those elements are parallel and spaced apart, or where those elements are collinear.

[0358] Some elements herein may be identified by a part number, which is composed of a base number followed by an alphabetical or subscript-numerical suffix (e.g., 300a, or 3001). Multiple elements herein may be identified by part numbers that share a base number in common and that differ by their suffixes (e.g., 3001, 3002, and 3003). All elements with a common base number may be referred to collectively or generically using the base number without a suffix (e.g., 300).

[0359] It should be noted that terms of degree such as “substantially”, “about”, and “approximately” as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. These terms of degree may also be construed as including a deviation of the modified term, such as by 1%, 2%, 5% or 10%, for example, if this deviation does not negate the meaning of the term it modifies. For example, the expressions “substantially perpendicular” and “substantially parallel” mean within 10% of perpendicular and parallel, respectively.General Description

[0360] The following is a general description intended to provide a basis for understanding several of the features that are discussed herein. As discussed in detail subsequently, each of the features may be used alone, or in combination, in any embodiment such as the exemplary embodiments described herein.General Description of a Hand Vacuum Cleaner

[0361] FIGS. 1 to 4 show an example embodiment of a surface cleaning apparatus 100. In the illustrated embodiment, the surface cleaning apparatus 100 is a hand-held vacuum cleaner, which is commonly referred to as a “hand vacuum cleaner” or a “handvac”. As used herein, a hand-held vacuum cleaner or hand vacuum cleaner or handvac is a vacuum cleaner that can be operated generally one-handedly to clean a surface while its weight is held by the same one hand. This is contrasted with upright and canister vacuum cleaners, the weight of which is supported by a surface (e.g., floor below) during use. As described subsequently herein, the principles and features applied to the various example hand vacuum embodiments described herein may also be applied to other vacuum types, such as upright and canister vacuum cleaners (see e.g., FIGS. 95, 100, and 108).

[0362] Optionally, the hand vacuum 100 can be mountable on a base so as to form, for example, an upright vacuum cleaner, a canister vacuum cleaner, a stick vac, a wet-dry vacuum cleaner and the like. The hand vacuum 100 can be either removably or permanently mounted to the base. For example, referring briefly to the example shown in FIGS. 5 and 6, the hand vacuum 100 is removably mounted to a base 102, forming a stick vac. As shown, the base 102 includes an elongated rigid wand 104 and a surface cleaning head 106.

[0363] Referring again to FIGS. 1 to 4, in the illustrated embodiment, the hand vacuum 100 has a front end 108, a rear end 110, an upper end 112, a lower end 114, and a hand vacuum axis 116 extending centrally through the hand vacuum 100 between the front and rear ends 108, 110. As used with respect to the hand vacuum axis 116, “centrally” as exemplified is generally centered between the upper and lower ends 112, 114, generally centered between lateral sides of the hand vacuum 100, or both.

[0364] The hand vacuum 100 may include a main body 118. The main body 118 may have a main body housing 120 and a handle 122 connected to the main body housing 118.

[0365] The hand vacuum 100 may further include an air treatment assembly 124 connected to the main body 118 (e.g., permanently or removably). The air treatment assembly 124 may have at least one cleaning stage 126. Each cleaning stage 126 may have an air treatment chamber 128, wherein a dirt collection region 130 may be provided internal to the air treatment chamber 128, and / or a dirt collection chamber 132 external to the air treatment chamber 128.

[0366] The hand vacuum 100 may further include a dirty air inlet 134, a clean air outlet 136 rearward of the dirty air inlet 134, an airflow path 138 extending between the dirty air inlet 134 and clean air outlet 136, and a motor and a fan assembly, which may be a suction motor 140 as exemplified to generate vacuum suction through the airflow path 138 (see e.g., example airflow path in FIGS. 2 and 3). The suction motor 140 may be positioned in the main body 118 within a motor housing 142, which may be integrally formed as part of the main body housing 120 and / or handle 122.

[0367] The hand vacuum 100 may further include a power supply to run the suction motor 140 and other electrical components of the hand vacuum 100. The power supply may be AC power supplied by an electrical cord (not shown) that may be plugged into a wall socket. Alternatively, or in addition to the electrical cord, the power supply of the hand vacuum 100 may include one or more onboard power sources, such as one or more energy storage members 144. Each energy storage member 144 of any suitable type, including, for example one or more batteries, such as solid-state batteries, and / or one or more capacitors, such as super capacitors or ultra capacitors. Each energy storage member 144 may be positioned in the main body 118 within an energy storage member housing 146, which may be integrally formed as part of the main body housing 120 and / or handle 122, or which may be removably mounted.

[0368] Optionally, the hand vacuum 100 may include a pre-motor filter 148 (as shown) and / or a post-motor filter 150 (see e.g., FIG. 34). The pre-motor filter 148 and post-motor filter 150 may respectively be positioned in the main body 118 within a pre-motor filter housing 152 and a post-motor filter housing 154. The pre-motor filter housing 152 and / or post-motor filter housing 154 may be integrally formed as part of the main body housing 120 or removably positioned therein. The pre-motor filter 148 may be positioned in the airflow path 138 downstream of the air treatment assembly 124 and upstream of the suction motor 140. The post-motor filter 150 may be positioned in the airflow path 138 downstream of the suction motor 140 and upstream of the clean air outlet 136.General Description of a Dirty Air Inlet

[0369] In use, dirty air may be drawn into the hand vacuum 100 through the dirty air inlet 134. Accordingly, the dirty air inlet 134 may be provided at the front end 108 and may be positioned proximate the upper end 112, the lower end 114, or any position therebetween. For example, in the embodiment illustrated in FIG. 2, the dirty air inlet 134 is provided at the front end 108 proximate the upper end 112 (see also e.g., FIGS. 32, 50, 70, 78, 91, 111, 114, 118, 135, 137, and 140). As another example, in the embodiment illustrated in FIG. 7, the dirty air inlet 134 is provided at the front end 108 at a position between the upper end 112 and the lower end 114 (see also e.g., FIGS. 54, 59, and 63). Optionally, as shown in FIG. 7, the dirty air inlet 134 can be centrally located between the upper and lower ends 112, 114 (see also e.g., FIGS. 74 and 105). The dirty air inlet 134 can also be provided at the front end 108 proximate the lower end 114 (see e.g., FIG. 88).General Description of an Air Inlet Conduit

[0370] Referring still to FIGS. 1 to 4, as shown, the dirty air inlet 134 may be provided at one end of an air inlet conduit 156. In this way, the end of the air inlet conduit 156 having the dirty air inlet 134 can be used as a nozzle to directly clean a surface. Optionally, the end of the air inlet conduit 156 having the dirty air inlet 134 can be connected to the wand 104 or an accessory tool such that the dirty air inlet 134 is downstream from an inlet of the wand 104, surface cleaning head 106, or the connected accessory.

[0371] Referring to FIGS. 2 to 3, the air inlet conduit 156 of the hand vacuum 100 has a conduit sidewall 158. As exemplified, the conduit sidewall 158 defines a channel 160 extending to the chamber air inlets 176. The conduit sidewall 158 that extends around the channel 160 may extend generally linearly in the direction of a conduit axis 164 for at least a portion of the length of the first channel 160 from the dirty air inlet 134 toward a dirty air outlet 162. As shown, the conduit axis 164 may be generally parallel to the hand vacuum axis 116 (see also e.g., FIGS. 52, 55, 72, 79, 89, 93, 106, 113, 116, 119, 136, 139, and 142). Optionally, the conduit axis 164 may be coaxial with the hand vacuum axis 116 (see e.g., FIGS. 7 and 75). Optionally, the conduit axis 164 may be at an angle to the hand vacuum axis 116 (see e.g., FIGS. 61 and 65).

[0372] The dirty air outlet 162 of the channel 160 may be axially opposed to the dirty air inlet 134 such that, as shown in FIG. 2, the conduit axis 164 may extend through both the dirty air inlet 134 and the dirty air outlet 162 (see also e.g., FIGS. 7, 61, 65, 89, 106, 113, 116, 119, 136, 139, and 142). Alternatively, in some embodiments, the dirty air outlet 162 of the channel 160 may be provided downstream from the dirty air inlet 134, such as in the conduit sidewall 158, such that the conduit axis 164 extends through the dirty air inlet 134 only (see e.g., FIGS. 52, 56, 72, 76, 79, and 93).

[0373] The channel 160 may form a header that extends angularly partially or fully around the air treatment chamber 128.

[0374] The dirty air outlet 162 of the first channel 160 may be in fluid flow communication with the air treatment chamber 128 of a first cleaning stage 1261 (optionally the only cleaning stage 126, as shown in FIGS. 1 to 4) of the air treatment assembly 124. Optionally, as shown, the dirty air outlet 162 may directly feed into the air treatment chamber 128 (i.e., without any intervening airflow passages) such that the conduit axis 164 may extend through each of the dirty air inlet 134, the dirty air outlet 162, and the air treatment chamber 128 of the first cleaning stage 1261 (see also e.g., FIGS. 7, 61, 65, 89, 106, 113, 116, 119, 136, 139, and 142). Alternatively, in some embodiments, the dirty air outlet 162 may indirectly feed into the air treatment chamber 128 (i.e., through an intervening airflow passage such as a tangential air inlet for a cyclone) such that the conduit axis 164 may extend through the dirty air inlet 134 only (see e.g., FIGS. 52, 72, and 79) or the dirty air inlet 134 and the air treatment chamber 128 only (see e.g., FIGS. 56, 75, and 93).

[0375] Optionally, a plurality of channels 160 may be provided. Each channel may be isolated from the other channel(s) and may deliver air to one or more chamber air inlets 176. Alternately, one or more channels may branch of a first channel 1601. In this latter case, a second channel 1602 may be in fluid flow communication with the first channel 1601 through a channel communication port 166. The channel communication port 166 may be provided at any location downstream of the dirty air inlet 134. For example, the channel communication port 166 may be axially opposed to the dirty air inlet 134 such that another conduit axis 1642 may extend through both the dirty air inlet 134 and the channel communication port 166 (see e.g., FIGS. 61 and 65). In such embodiments, the airflow path 138 may branch off and the airflow through the channel communication port 166 from the first channel 1601 into the second channel 1602 may be generally parallel to the airflow in the first channel 1601. Alternatively, instead of being axially opposed to the dirty air inlet 134, the channel communication port 166 may be further downstream such that the other conduit axis 1642 extends through the dirty air inlet 134 only (see e.g., FIGS. 66 and 71). In such embodiments, the airflow path 138 may branch off and the airflow through the channel communication port 166 from the first channel 1601 into the second channel 1602 may be tangential (e.g., at an acute angle) to the airflow in the first channel 1601. Further alternatively, the channel communication port 166 may be provided in the conduit sidewall 158 around the first channel 1601 (see e.g., FIGS. 13, 77, 119, and 142). In such embodiments, the airflow path 138 may branch off and the airflow through the channel communication port 166 may travel generally radially outwardly from the first channel 1601 into the second channel 1602.

[0376] Optionally, as described in greater detail subsequently herein, the channel communication port 166 may have a porous filtration material 168 such as a mesh or a screen (see e.g., FIGS. 7, 61, 65, 66, 71, 77, 119, and 142). Generally, the porous filtration material 168 of the channel communication port 166 may permit dirty air carrying finer dirt particles to pass through to the second channel 1602, while restricting the passage of coarse dirt particles. Those coarse dirt particles that may become stuck on the porous filtration material 168 may be stripped off of the porous filtration material 168 by the airflow travelling further downstream in the first channel 1601. The coarse dirt particles may then be carried downstream to the dirty air outlet(s) 162 of the first channel 1601.

[0377] The conduit sidewall 158 around the second channel 1602 may wrap around at least a portion of the air treatment chamber 128 of the first cleaning stage 1261 (optionally the only cleaning stage 126) from the channel communication port 166 to at least one dirty air outlet 162 of the second channel 1602. In this way, the second channel 1602 may form an annular header around at least part of the air treatment chamber 128 (which may therefore be partially of fully annular). Accordingly, the dirty air outlet(s) 162 (such as at the end of the first channel 1601) may be at least one primary dirty air outlet 1621, and the second channel 1602 may further include at least one secondary dirty air outlet 1622 (see e.g., FIGS. 8 to 10, 13, 51, 56, 61, 65, 66, 71, 77, 106, 113, 117, 119, and 142).

[0378] Each dirty air outlet 162 of the second channel 1602 may be in fluid flow communication with the air treatment chamber 128 of the first cleaning stage 1261 of the air treatment assembly 124. Optionally, each dirty air outlet 162 of the second channel 1602 may directly feed into the air treatment chamber 128 (i.e., without any intervening airflow passages). Optionally, as described in greater detail subsequently herein, each dirty air outlet 162 of the second channel 1602 (other than the downstream-most dirty air outlet 162) may have a porous filtration material 168 such as a mesh or a screen.

[0379] Optionally, more than one air inlet conduit 156 may be provided. Each air inlet conduit 156 may have one dirty air inlet 134 at one end thereof and at least one dirty air outlet 162 downstream of the dirty air inlet 134. Each air inlet conduit 156 may have a conduit sidewall 158 that may define a first channel 1601 and optionally a second channel 1602 in accordance with the foregoing general description of an air inlet conduit 156 (see e.g., FIGS. 11 to 12).General Description of an Air Treatment Assembly

[0380] The air treatment assembly 124 may be configured to treat the air in a desired manner, including, for example, removing dirt particles and other debris and / or water from the airflow. The air treatment assembly 124 may include at least one cleaning stage 126 and may optionally include two or more cleaning stages arranged in series with each other. Each cleaning stage 126 may comprise one or more air treatment chambers 128.

[0381] In any embodiment, one or more cleaning stages 126 may be cyclonic. Each cyclonic cleaning stage 124 may include one cyclonic air treatment chamber 128 or, optionally, a plurality of cyclonic air treatment chambers 128 arranged in parallel with each other. In such embodiments, the air treatment assembly 124 may alternatively be referred to as a cyclone assembly 122. Similarly, each cyclonic air treatment chamber 128 may alternatively be referred to as a cyclone chamber 128. For example, in the embodiment illustrated in FIGS. 2 to 4, the air treatment assembly 124 is a cyclone assembly 124 including a single cyclonic cleaning stage 126 having a single cyclone chamber 128.

[0382] In any embodiment, one or more cleaning stages 126 may be non-cyclonic. For example, the air treatment chamber 128 of a non-cyclonic cleaning stage 126 may be a non-cyclonic momentum separator. Within the air treatment chamber 128 of a non-cyclonic momentum separator, the airflow path 138 may include one or more significant directional changes (e.g., of 45°, 90° or more) whereby dirt particles with higher momentum than the air are separated (e.g., thrown) from the airflow during each directional change. As another example, as described in greater detail subsequently herein, the air treatment chamber 128 of a non-cyclonic cleaning stage 126 may be a spinning disc separator (see e.g., second stage air treatment chamber 1282 of FIGS. 29A and 29B).

[0383] Alternately, or in addition, the air treatment chamber 128 of any cleaning stage 126 may include a bag, an air treatment chamber having one or more outlet screens, a porous physical filter media (such as foam or felt), or other air treating means.

[0384] The air treatment assembly 124 may be configured to collect particulate matter separated from the airflow in any suitable location. Optionally, as shown in FIGS. 2 to 4, each cleaning stage 126 may include a dirt collection region 130 that is internal to the air treatment chamber 128. If a cleaning stage 126 includes a plurality of air treatment chambers 128, each air treatment chamber 128 may have an individual internal dirt collection region 130. Alternately, or in addition, as shown in FIGS. 2 to 4, each cleaning stage 126 may include one or more dirt collection chambers 132 that are external to the air treatment chamber(s) 128. If a cleaning stage 126 includes a plurality of air treatment chambers 128, each air treatment chamber 128 may have an individual external dirt collection chamber 132 or, alternatively, the air treatment chambers 128 may share a common external dirt collection chamber 132. Similarly, if an air treatment assembly 124 includes a plurality of cleaning stages 126, each cleaning stage 126 may have an individual external dirt collection chamber 132 or, alternatively, the cleaning stages 126 may share a common external dirt collection chamber 132.

[0385] Each cleaning stage 126 may include means for emptying each dirt collection region 130 and / or dirt collection chamber 132 thereof. For example, each cleaning stage 126 may include one or more openable portions (e.g., doors) movably mounted by a mount or removably mounted for emptying each dirt collection region 130 and / or dirt collection chamber 132. As described in greater detail subsequently herein, depending on the configuration of the hand vacuum 100, the openable portion(s) may be concurrently openable or separately sequentially openable. If the openable portions are concurrently moveable, the openable portions may be operatively connected to move in synchronization or integrally formed (i.e., such that a single moveable portion opens more than one dirt collection region 130 and / or dirt collection chamber 132).

[0386] Additionally, or alternatively, the air treatment assembly 124 may be moveably connected (e.g., moveably or removably) to the main body 118 for emptying. For example, the air treatment assembly 124 may be fully removable from the main body 118 whereby removing the air treatment assembly 124 may open one or more the various dirt collection regions / chambers 130, 132 for emptying and / or permit transport of the air treatment assembly 124 to, e.g., a refuse bin or docking station to empty the various dirt collection regions / chambers 130, 132 via the one or more openable portions. As another example, the air treatment assembly 124 may be moveably connected (e.g., pivotably, translatably, etc.) to the main body 118 whereby moving the air treatment assembly 124 may open one or more of the various dirt collection regions / chambers 130, 132 for emptying. A fully moveable / removable air treatment assembly 124 may advantageously allow access to additional portions of the hand vacuum 100 that would otherwise be concealed (e.g., the pre-motor filter housing 152) such as for cleaning, inspection, and the like.General Description of a First Stage Air Treatment Chamber

[0387] Referring again to FIGS. 2 to 4, as shown, the air treatment chamber 128 may have a central axis 170. If the air treatment chamber 128 is a cyclone chamber, then the central axis 170 may alternatively be referred to as a cyclone axis of rotation 170 about which the airflow path 138 rotates within the air treatment chamber 128 (see also e.g., FIGS. 22 to 27, 52, 55, 60, 64, 72, 75, 79, 93, 106, 113, 117, and 124, 127, 128, 131, 132, and 136). If the air treatment chamber 128 is non-cyclonic, then the central axis 170 may be the longitudinal axis of the air treatment chamber 128. As used herein, “central” means the central axis 170 is centrally located in the air treatment chamber 128 and generally equally spaced from a treatment chamber sidewall 172 of the air treatment chamber 128.

[0388] The air treatment chamber 128 may be any type of cyclone chamber, such as a transverse cyclone chamber, a horizontal cyclone chamber, or a vertical cyclone chamber. The orientation of the central axis 170 may depend on the type of air treatment chamber 128.

[0389] For example, in embodiments where the air treatment chamber 128 is a transverse cyclone chamber, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the central axis 170 of the air treatment chamber 128 may also be oriented horizontally and may extend generally transverse to the hand vacuum axis 116 (i.e., intersecting the laterally opposed sides of the hand vacuum 100; see e.g., FIGS. 3, 22 to 27, 34 to 35, 106, 124, 128, and 136). Optionally, in such embodiments, the central axis 170 of the air treatment chamber 128 may intersect the hand vacuum axis 116 (they may line in a common plane). Further, in such embodiments, the central axis 170 may be at a mid-line of the air treatment chamber 128 at an elevation equidistantly between a lower end of the air treatment chamber 128 and an upper end of the air treatment chamber 128 and equidistantly positioned between the front and rear ends of the air treatment chamber 128.

[0390] Similarly, in embodiments where the air treatment chamber 128 is a horizontal cyclone chamber, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the central axis 170 of the air treatment chamber 128 may be generally parallel to the hand vacuum axis 116 (i.e., intersecting the front and rear ends 108, 110 of the hand vacuum 100; see e.g., FIGS. 52, 72, 75, 78, and 93). Optionally, in such embodiments, the central axis 170 of the air treatment chamber 128 may be coaxial with the hand vacuum axis 116 (see e.g., FIGS. 52, 72, 75, and 78). Further, in such embodiments, the central axis 170 may be at a mid-line of the air treatment chamber 128 at an elevation equidistantly between the lower end of the air treatment chamber 128 and the upper end of the air treatment chamber 128 and equidistantly positioned between the opposed lateral sides of the air treatment chamber 128.

[0391] Alternatively, in embodiments where the air treatment chamber 128 is a vertical cyclone chamber, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the central axis 170 of the air treatment chamber 128 may be oriented vertically and may extend generally transverse to the hand vacuum axis 116 (i.e., intersecting the upper and lower ends 112, 114 of the hand vacuum 100; see e.g., FIGS. 55, 60, 64, 113, 117, and 132). Optionally, as shown in these embodiments, the central axis 170 of the air treatment chamber 128 may intersect the hand vacuum axis 116.

[0392] If it will be appreciated that, in any air treatment member, the central axis 170 may be oriented with respect to the conduit axis 164 of the air inlet conduit 156 similar to as described with respect to the hand vacuum axis 116 in embodiments in which the conduit axis 164 is generally parallel to the hand vacuum axis 116. For example, when the hand vacuum 100 is oriented as described previously, the central axis 170 may be horizontal and extend generally transversely to the conduit axis 164 (see e.g., FIGS. 3, 22 to 27, 106, 127, 131, and 136) and, in some embodiments, intersect the conduit axis 164. As another example, when the hand vacuum 100 is oriented as described previously, the central axis 170 may be horizontal and extend generally parallel to the conduit axis 164 (see e.g., FIGS. 52, 72, 79, and 93) and, in some embodiments, coaxial with the conduit axis 164 (see e.g., FIG. 75). As yet another example, when the hand vacuum 100 is oriented as described previously, the central axis 170 may be vertical and extend generally transversely to the conduit axis 164 (see e.g., FIGS. 60 and 64) and, in some embodiments, intersect the conduit axis 164 (see e.g., FIGS. 55, 113, 117, and 132).

[0393] Referring again to FIGS. 3 to 4, as shown, the air treatment chamber 128 may have a first end wall 1741 and an axially opposed second end wall 1742. The treatment chamber sidewall 172 may extend between the first and second end walls 174. Similar to as described with respect to the central axis 170, the orientation of the treatment chamber sidewall 172 may depend on the type of air treatment chamber 128. For example, the treatment chamber sidewall 172 of a transverse cyclone may extend generally transversely to the hand vacuum axis 116 (see e.g., FIGS. 3 to 4, 22 to 27, 34 to 35, 106, 127, 131, 136, 138, and 142). In such embodiments, the first and second end walls 174 may be laterally opposed within the coordinate system of the hand vacuum 100 as a whole. Similarly, if the air treatment chamber 128 is a vertical cyclone, the treatment chamber sidewall 172 may extend generally transversely to the hand vacuum axis 116 and the first and second end walls 174 may be vertically opposed within the coordinate system of the hand vacuum 100 as a whole (see e.g., FIGS. 55, 60, 64, 113, 117, and 132). Further, if the air treatment chamber 128 is a horizontal cyclone, the treatment chamber sidewall 172 may extend generally parallel to the hand vacuum axis 116 and the first and second end walls 174 may be longitudinally opposed within the coordinate system of the hand vacuum 100 as a whole (see e.g., FIGS. 52, 72, 75, 79, and 93).

[0394] The air treatment chamber 128 may have any cross-sectional shape in a plane that is transverse to the central axis 170 (e.g., taken along line 2-2 in FIG. 1, line 33-33 in FIG. 32, line 66-66 in FIG. 50, line 56-56 in FIG. 54, line 61-61 in FIG. 59, line 65-65 in FIG. 63, line 71-71 in FIG. 70, line 77-77 in FIG. 74, line 89-89 in FIG. 88, line 106-106 in FIG. 105, line 136-136 in FIG. 135, line 138-138 in FIG. 137, and line 141-141 in FIG. 140). For example, the cross-sectional shape of the air treatment chamber 128 may be generally circular (see e.g., FIGS. 2, 33, 51, 56, 61, 65, 66, 71, 77, 89, 106, 119, 136, 138, and 142). In such embodiments, the treatment chamber sidewall 172 may extend generally linearly between the first and second end walls 174. A generally circular cross-section may improve cyclonic airflow in embodiments in which the air treatment chamber 128 is a cyclone chamber.

[0395] Optionally, as shown in FIG. 14, one or more portions of the sidewall of the air treatment chamber—shown as the rear side of the air treatment chamber 128—may be flat such that the cross-sectional shape of the air treatment chamber 128 may be a major segment (i.e., a shape formed by an arc of more than half of a circumference of a generally circular shape and a straight line segment connecting the endpoints of the arc). A flat side of the cyclone, such as the rearward side, may advantageously enable a more compact hand vacuum 100 in the longitudinal (front / rear) direction without significantly interfering with the dirt separation efficiency of the air treatment chamber 128. Any other shape may be possible, such as generally rectangular or square (e.g., in a non-cyclonic momentum separator). Further, as discussed subsequently, the air treatment chamber (cyclone chamber) may be trapezoidal.

[0396] The air treatment chamber 128 may include at least one chamber air inlet 176. Each chamber air inlet 176 of the air treatment chamber 128 may be fluidly connected to a corresponding dirty air outlet 162 of the air inlet conduit 156. Dirty air may exit the dirty air outlet(s) 162 of the air inlet conduit 156 and enter the air treatment chamber 128 through the corresponding chamber air inlet 176 in the treatment chamber sidewall 172. As exemplified in each of FIGS. 2 and 7 to 13, wherein the air treatment chamber 128 is cyclonic, each chamber air inlet 176 may be a tangential air inlet (see also e.g., FIGS. 51, 56, 61, 65, 66, 71, 77, 106, 119, 132, 136, 139, and 142). That is, dirty air may be introduced into the air treatment chamber 128 in a tangential direction (e.g., along the treatment chamber sidewall 172). Alternately, the chamber air inlet 176 may be an axial air inlet that is used to introduce dirty air into the air treatment chamber 128 in the axial direction thereof.

[0397] The tangential chamber air inlet(s) 176 may be provided in the treatment chamber sidewall 172 at any location around the circumference of the air treatment chamber 128. For example, as shown in FIG. 2, the air treatment chamber 128 has only one tangential chamber air inlet 176 and the chamber air inlet 176 may be provided at the upper end of the air treatment chamber 128 (see also e.g., FIGS. 94, 130, 136, and 139). The one chamber air inlet 176 may alternatively be provided at any other location between the upper and lower ends of the air treatment chamber 128, such as at the lower end (see e.g., FIG. 7).

[0398] As another example, if the air treatment chamber 128 has more than one tangential chamber air inlet 176, then the chamber air inlets 170 may be circumferentially spaced apart about the treatment chamber sidewall 172 (see e.g., FIGS. 8 to 13, 51, 56, 61, 65, 66, 71, 106, 113, 117, 119, and 142). Stated another way, the tangential chamber air inlets 176 may be angularly spaced apart about the central axis 170. The chamber air inlets 176 may have any circumferential / angular spacing, which may correspond to the spacing of the dirty air outlets 162 of the air inlet conduit 156.

[0399] If the air treatment chamber 128 is cyclonic, providing more than one chamber air inlet 176 may advantageously enable the use of a cyclone chamber having a shorter axial length and, therefore, may advantageously provide a more compact hand vacuum 100. The dirty air flow entering the air treatment chamber 128 may maintain generally the same width as the outlet port of the chamber air inlet 176 (i.e., in the direction of the central axis 170) while following the cyclonic airflow path 138. Accordingly, the air treatment chamber 128 may have an axial length that is a multiple of the width of the chamber air inlet 176 (i.e., in the direction of the central axis 170) such that the airflow path 138 may complete a minimum desired number of revolutions within the air treatment chamber 128 before reaching an air outlet of the air treatment chamber 128. For example, the air treatment chamber 128 may have an axial length that is 2.5, 3, 3.5, 4 or more times the width of the outlet port of the chamber air inlet 176 such that the airflow path may complete 2.5, 3, 3.5, 4 or more revolutions within the air treatment chamber 128 before reaching an air outlet of the air treatment chamber 128 or reversing direction towards the air outlet. The air treatment chamber 128 and chamber air inlet 176 may thus be sized to achieve a minimum desirable separation efficiency, which may be influenced at least by the number of revolutions of the airflow path 138 within the air treatment chamber 128. For example, at least 3 revolutions may achieve a minimum desirable separation efficiency. Accordingly, increasing the number of chamber air inlets 176 may enable the width of each chamber air inlet 176 to be shorter while introducing dirty air into the air treatment chamber 128 at about the same air flow rate. This, in turn, may enable the air treatment chamber 128 to be shorter while achieving the desired number of revolutions within the air treatment chamber 128 and thus meeting or exceeding the minimum desirable separation efficiency.

[0400] Treated air may exit the air treatment chamber 128 through one or more chamber air outlets which may comprise or consist of chamber air outlet ports 178 in the first and / or second end walls 174. Optionally, if only one chamber air outlet is used, the air treatment chamber 128 can be a cyclone with unidirectional airflow (i.e., a “uniflow” cyclone chamber wherein the chamber air inlet 176 and chamber air outlet port 178 are at opposite ends of the air treatment chamber 128; see e.g., FIGS. 22, 53, and 93). Alternatively, the air treatment chamber 128 may be configured so that the chamber air inlet 176 and chamber air outlet port 178 are located toward the same end of the air treatment chamber 128 (as is typical of a cyclone; see e.g., FIGS. 23, 55, 60, 64, 67, 79, 113, and 117) and, if the cyclone is vertically oriented with the air inlet and air outlet at the bottom (e.g., the opposite of that shown in FIG. 113B), may be referred to as an inverted cyclone. Further alternatively, the air treatment chamber 128 may be configured so that the chamber air inlet 176 is centered between the first and second end walls 174 (i.e., a hybrid cyclone chamber wherein the airflow path splits into bidirectional airflow paths; see e.g., FIG. 27). In typical cyclone and hybrid embodiments, the chamber air outlet port 178 may be provided in one of the end walls 174 and the other of the end walls 174 may be air impermeable (e.g., a solid planar wall).

[0401] As discussed subsequently, in the embodiment illustrated in FIGS. 1 to 4, the air treatment chamber 128 is a split-flow cyclone with bidirectional airflow to two chamber air outlets 178 from one centrally located chamber air inlet 176 (see also e.g., FIGS. 24 to 26). That is, in the illustrated embodiments, each of the first and second end walls 174 of the air treatment chamber 128 has one chamber air outlet port 178 and the chamber air inlet 176 is generally centrally located between the first and second end walls 174. In this way, the airflow path 138 entering the air treatment chamber 128 may divide into two airflow paths, wherein each airflow path travels to a respective one of the chamber air outlets.

[0402] Any air treatment chamber air outlet may be used and each chamber air outlet may be the same or different and may have a porous member 180, such as a screen or mesh, positioned over the chamber air outlet port 178. Each porous member 180 may extend axially inwardly into the air treatment chamber 128 from the end wall 174 in which the respective chamber air outlet port 178 is provided. Optionally, each chamber air outlet may comprise an air outlet conduit 182, which may be partially or fully air impermeable, having a length extending from the chamber air outlet port 178 in the respective end wall 174 (i.e., an outlet end), to a distal end (i.e., an inlet end), which is axially spaced from the end wall 174. In such embodiments, the porous member 180 of each chamber air outlet may extend axially inwardly into the air treatment chamber 128 from the distal end of the respective air outlet conduit 182.

[0403] The porous member(s) 180 may have any shape such as, for example, semi-spherical (see e.g., FIGS. 22, 25, 26, and 27), cylindrical (see e.g., FIGS. 55 and 64), flat (see e.g., FIG. 26), conical (see e.g., FIG. 67), or frusto-conical (see e.g., FIGS. 23 and 24). If there is more than one chamber air outlet, the porous members 180 of the chamber air outlets 178 may have the same shape (see e.g., FIGS. 24 and 25) or may be differently shaped (see e.g., FIG. 26). The air outlet conduit 182 may optionally be a continuation of the shape of the porous member 180 or, alternatively, may be cylindrical in shape.

[0404] The porous member 180 may include a screen through which the airflow path 138 passes. The screen may have a plurality of pores, and the pores may have any size suitable for permitting the passage of air therethrough while restricting the passage of particulate matter. The screen may be self-supporting (e.g., rigid) and / or supported by a plurality of ribs extending along the screen.

[0405] The porous member 180 may include solid portion facing each chamber air inlet 176 in embodiments where the chamber air inlet(s) 176 and the chamber air outlet port 178 are positioned proximate the same end wall 174 (see e.g., FIGS. 23, 68 to 69, 72 to 73, and 79 to 82). The solid portion may be air impermeable, which may prevent the airflow path 138 from passing directly from the chamber air inlet(s) 176 through the porous member 180 to the chamber air outlet port 178. This may also prevent the pores of the porous member 180 from becoming clogged by the dirty airflow directly impacting on the screen. The rest of the air outlet conduit 182 may be porous or air impermeable.

[0406] The porous members 180 may optionally be removably connected (e.g., threadably, snap-fit, etc.) to the respective end wall 174 over the chamber air outlet port 178. Similarly, the porous members 180 may optionally be removably connected to the air outlet conduit 182, if present. In such embodiments, the air outlet conduit 182, if present, may optionally be integrally formed with the end wall 174. Alternatively, the air outlet conduit 182 may optionally be removably connected to the respective end wall 174. In such embodiments, the porous member 180 may optionally be integrally formed with the air outlet conduit 182. In any such embodiments, the porous members 180 may advantageously be removed from the end wall 174 for inspection, cleaning, and / or replacement. Further, porous members 180 of various shapes may advantageously be interchangeably connected to the end wall 174 to change the airflow dynamics and / or collection capacity of the dirt collection region 130 of the air treatment chamber 128.

[0407] The porous member(s) 180 alone or collectively with their respective air outlet conduits 182, if present, may also be referred to herein as vortex finders and / or porous vortex finders. Optionally, as described in greater detail subsequently herein, if a chamber air outlet port 178 is provided in only one of the end walls 174, the air treatment chamber 128 may optionally include a vortex finder 184 comprising an air impermeable air outlet conduit 182 extending axially inwardly into the air treatment chamber 128 from the axially opposed end wall 174 (see e.g., FIG. 22). The vortex finder 184 may have any shape such as those described with respect to the porous member 180 (alone or in combination with the air outlet conduit 182). The vortex finder 184 may optionally be removably connected to the respective end wall 174 such as described with respect to the porous member 180, which may confer similar advantages to those described.

[0408] Optionally, if the air treatment chamber 128 is a cyclone chamber, the porous member(s) 180 may include a ring 185 extending outwardly from a distal end of the porous member 180 toward the treatment chamber sidewall 172 (see e.g., FIGS. 60, 113, 117, and 132).

[0409] Optionally, if the air treatment chamber 128 is a cyclone chamber, the air treatment chamber 128 may include one or more vanes 186 extending axially inwardly into the air treatment chamber 128 from the first and / or second end wall 174. Each vane 186 may be a circular ring (around the chamber air outlet, if present). Optionally, if more than one vane 186 is provided in an end wall 174, the vanes 186 may be arranged in concentric rings (see e.g., FIGS. 55 to 58, and 72 to 73). The vanes 186 may assist in guiding the cyclonic airflow path 138 within the air treatment chamber 128 as the airflow path 138 moves radially inwardly toward the chamber air outlet(s) 178.General Description of a First Stage Dirt Collection Region

[0410] Referring again for FIGS. 2 to 4, as shown, the air treatment chamber 128 of the first cleaning stage 1261 may include a dirt collection region 130 internal to the air treatment chamber 128 (see also e.g., FIGS. 55, 57 to 58, 60, 64, 72 to 73, 75 to 76, 79 to 82, 90, 93, 106 to 107, 113, 116 to 117, 119 to 131, 132, 136, 138, and 142). Accordingly, at least some of the particulate matter separated by the porous member 180 and / or other separation means (e.g., momentum separation) may remain in the air treatment chamber 128. The dirt collection region may be at an end of the air treatment chamber axially opposed to the air outlet end of the air treatment chamber or in a recess or the like of the air treatment chamber.

[0411] In such embodiments, the treatment chamber sidewall 172 may include a moveable portion 188 that is moveably connected to the treatment chamber sidewall 172. Alternately or in addition the moveable portion may be part or all of an end wall may be moveably mounted. The moveable portion 188 may be moveably connected (e.g., pivotally or translatably) to the treatment chamber sidewall 172 by a mount 190. The mount 190 may be any suitable mechanism for moveably connection the moveable portion 188 to the rest of the treatment chamber sidewall 172 (the stationary portion). For example, the mount 190 may be a rotatable mount such as a hinge (as shown in the illustrated embodiments), sliding tracks, and the like.

[0412] The mount 190 may be provided at any suitable location. For example, as discussed subsequently, a rotatable mount 190 may be provided at a front end of the air treatment chamber 128 such that, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the movable portion 188 may rotate forwardly and upwardly (see e.g., FIGS. 15A to 15B, 17, 20A to 20B, 20C to 20D, 28, 33A, 42, 48, 75, 81, 84, 86A to 86B, 113, and 117). As another example, a rotatable mount 190 may be provided at a lower end of the air treatment chamber 128 such that, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the movable portion 188 may rotate downwardly and rearwardly (see e.g., FIGS. 16A to 16B, 58, 68, 73, 120, 123, 125, 126, 130, and 145). As yet another example, a translatable mount 190 may be provided proximate, e.g., the end walls 174 of the air treatment chamber 128 such that, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the movable portion 188 may translate forwardly (see e.g., FIG. 21A). Any other location of the mount 190, providing any other directional motion, may be used. This may depend, for example, on the desired location of the moveable portion 188 and / or the relative location of the air treatment chamber 128 to the dirt collection chamber 132.

[0413] The moveable portion 188 may be moveable between a closed position in which the air treatment chamber 128 is closed and an open position in which the air treatment chamber 128 is open. When the moveable portion 188 is in the closed position, the hand vacuum 100 may be operable to clean a surface. When the moveable portion 188 is in the open position, the dirt collection region 130 may be placed in communication with a volume exterior to the air treatment chamber 128. For example, the dirt collection region 130 may be placed in communication with an external dirt collection chamber 132, an exterior of the hand vacuum 100 (see e.g., FIGS. 55, 57 to 58, 73, 75, 81, 107, 113, and 117), or both (see e.g., FIGS. 17, 20A to 20B, 21A, 28, 33A, 42, 48, 68, 84, 86A to 86B, 120, 123, 125, 126, 130, 143, and 145), such that the contents in the dirt collection region 130 may be transferred thereto.

[0414] Optionally, the moveable portion 188 can be secured in the closed position using any suitable type of locking mechanism, including a latch mechanism that can be released by a user and / or docking at a docking station. The actuator for opening / releasing the moveable portion 188 can be provided on the air treatment assembly 124 itself, on the main body 118, or on any other portion of the hand vacuum 100 and / or the docking station.General Description of a First Stage Dirt Collection Chamber

[0415] Additionally, or in the alternative to a dirt collection region 130 internal to the air treatment chamber 128, a cleaning stage, such as the first cleaning stage 1261, may include a dirt collection region that is external to the air treatment chamber of that stage. For example, in the embodiment illustrated in FIGS. 2 to 4, the first cleaning stage 1261 includes the dirt collection chamber 132 that is external to the air treatment chamber 128 (see also e.g., FIGS. 52 to 53, 67 to 69, 89 to 90, 92 to 94, 106 to 107, 119 to 131, 136, 139, and 142).

[0416] In such embodiments, the air treatment chamber 128 may be in communication with the dirt collection chamber 132 by one or more dirt outlets 192, which may be of any configuration known in the art. For example, as shown, each dirt outlet 192 may be a slot opening provided in the treatment chamber sidewall 172 between the first and second end walls 174. Each dirt outlet 192 may allow particulate matter to pass from the air treatment chamber 128 to the external dirt collection chamber 132. Accordingly, at least some of the particulate matter separated by momentum separation (e.g., thrown from the air flow by a cyclonic airflow path 138 or by a directional change in a non-cyclonic airflow path 138) and / or other separation means (e.g., the porous member 180) may pass through the one or more dirt outlets 192 of the air treatment chamber 128 into the dirt collection chamber 132. The separated dirt particles may be thrown through the dirt outlet(s) 192 and / or fall therethrough under the force of gravity.

[0417] The dirt outlet(s) 192 may face forwardly, rearwardly, and / or downwardly, depending on the location of the dirt collection chamber 132 relative to the air treatment chamber 128. For example, in the embodiment illustrated in FIGS. 2 to 4, the dirt collection chamber 132 is below the air treatment chamber 128 and the dirt outlets 192 are provided in the lower end of the air treatment chamber 128 facing generally downwardly (see also e.g., FIGS. 15, 53, 67, 80, and 93). As another example, in the embodiment illustrated in FIGS. 16A to 16B, the dirt collection chamber 132 is forward of the air treatment chamber 128 and the dirt outlets 192 are provided in a front end of the air treatment chamber 128 facing generally forwardly (see also e.g., FIGS. 89, 119 to 131, and 142). As yet another example, in the embodiment illustrated in FIG. 7, the dirt collection chamber 132 is rearward of the air treatment chamber 128 and the dirt outlets 192 are provided in the rear end of the air treatment chamber 128 facing generally rearwardly (see also e.g., FIG. 106).

[0418] The dirt collection chamber132 may surround all or part of the air treatment chamber 128 (i.e., all or part of the lower end, the rear end, the front end, and any combination thereof). Accordingly, it will be appreciated that the dirt outlet(s) 192 may be positioned at any location within the portion of the air treatment chamber 128 that is surrounded by the dirt collection chamber 132.

[0419] In some embodiments, the air treatment chamber 128 may have one dirt outlet 192 with the long dimension extending through the treatment chamber sidewall 172 generally parallel to the central axis 170 (see e.g., FIG. 22). Alternately, the air treatment chamber 128 may have a plurality of dirt outlets 192 extending through the treatment chamber sidewall 172 having a long dimension generally parallel to the central axis 170 (see e.g., FIGS. 3, 24, 25, and 27). Similarly, the air treatment chamber 128 may have one dirt outlet 192 (see e.g., FIGS. 23, 53, 67, 80, and 93) or, alternatively, a plurality of dirt outlets 192 (see e.g., FIGS. 26, 106, 121 to 131, 136, 139, and 142) extending through the treatment chamber sidewall 172 having a long dimension generally transverse to the central axis 170. As shown in the embodiments having one dirt outlet 192, the dirt outlet 192 may be an elongated slot at any location between the first and second end walls 174. As shown in the embodiments having two dirt outlets 192, the dirt outlets 192 may be shorter slots spaced apart toward respective end walls 174 of the air treatment chamber 128. Any other number of dirt outlets 192, having any other orientation relative to the central axis 179, may be used.

[0420] Each dirt outlet 192 may be spaced apart from the chamber air inlet(s) 176. For example, in embodiment illustrated in FIG. 3, the dirt outlets 192 are axially spaced apart from the central chamber air inlet 176 on laterally opposed sides thereof such that incoming dirty airflow may enter the air treatment chamber 128 axially between the dirt outlets 192 (see also e.g., FIGS. 24 to 27, 106, 121 to 131, 136, 139, and 142). As another example, if only one dirt outlet 192 is used, the chamber air inlet(s) 176 may be proximate one end wall 174 and the dirt outlet 192 may be proximate the opposite end wall 174 (see e.g., FIGS. 22, 23, 53, 67, 79 to 80, and 93).

[0421] Spacing each dirt outlet 192 from the chamber air inlet(s) 176 may prevent incoming dirty airflow from passing through the dirt outlet(s) 192 directly from the chamber air inlet(s) 176. This may also enable the airflow path 138 to complete at least half of a revolution within the air treatment chamber 128 before passing over the dirt outlets 192. As the airflow path 138 travels cyclonically within the air treatment chamber 128, the airflow path 138 may tend to move radially inwardly toward the central axis 170 while the inertia of the dirt particles may cause the dirt particles to be tangentially thrown from the curved path to then fall along the treatment chamber sidewall 172. Accordingly, spacing the dirt outlets 192 from the chamber air inlet(s) 176 may enable the airflow path 138 to begin to separate from the treatment chamber sidewall 172 and to begin throwing dirt particles along the treatment chamber sidewall 172. In this way, air passing through the dirt outlet(s) 192 may be minimized or eliminated, which may decrease turbulence in the airflow path 138, while also enabling separated dirt particles to enter the dirt collection chamber without becoming re-entrained in the air flow.

[0422] Optionally, at least one dirt outlet 192 may be provided proximate one of the chamber air outlets 178. Optionally, the air inlet is at an end axially opposed to the air outlet. For example, in the embodiment illustrated in FIG. 26, the dirt outlet 192 is transverse to the central axis 170 and is provided below the chamber air outlet (see also e.g., FIGS. 53, 93, 106, 121 to 131, 136, and 139). In this way, in such embodiments, the airflow path 138 travelling toward each chamber air outlet port 178 may complete at least one revolution within the air treatment chamber 128 before passing over the dirt outlets 192.

[0423] Optionally, if only one chamber air outlet is provided, at least one dirt outlet 192 may be provided opposite the chamber air inlet 176. Optionally, the air inlet is at the end having the air outlet. For example, in the embodiment illustrated in FIG. 23, the dirt outlet 192 has a long dimension that is transverse to the central axis 170 and is provided proximate the second end wall 1742 opposite or spaced from the chamber air inlet 176 at the first end wall 1741 (see also e.g., FIGS. 67 and 79). In this way, the airflow path 138 travelling away from the chamber air inlet 176 (e.g., in a uniflow or hybrid configuration) may complete at least one revolution within the air treatment chamber 128 before passing over the dirt outlet 192.

[0424] Optionally, at least one dirt outlet 192 may be provided in the treatment chamber sidewall 172 adjacent the moveable portion 188 thereof. In such embodiments, at least one side of each dirt outlet 192 adjacent the moveable portion 188 may be defined by the moveable portion 188. For example, in the embodiments illustrated in FIGS. 22 and 24, the side of each dirt outlet 192 adjacent the moveable portion 188 and extending generally parallel to the central axis 170 is defined by the moveable portion 188. As another example, in the embodiments illustrated in FIGS. 23 and 26, the side of each dirt outlet 192 adjacent the moveable portion 188 and extending generally transverse to the central axis 170 is defined by the moveable portion 188 (see also e.g., FIG. 67). Accordingly, the dirt outlet is opened when the moveable portion 188 is opened.

[0425] In alternate embodiments, at least one dirt outlet 192 may be provided in the moveable portion 188 of the treatment chamber sidewall 172. In such embodiments, the dirt outlet 192 may be bordered by the moveable portion 188 of the treatment chamber sidewall 172 on at least two sides and bordered by the stationary portion of the treatment chamber sidewall 172 on at least one side. For example, in the embodiments illustrated in FIG. 27, each dirt outlet 192 is bordered by the moveable portion 188 of the treatment chamber sidewall 172 on two sides and bordered by the stationary portion of the treatment chamber sidewall 172 on the other two sides (see also e.g., FIG. 28). Optionally, as exemplified in FIG. 107, the dirt outlet 192 may be bordered on all sides by the moveable portion 188 (i.e., fully within the moveable portion 188; see also e.g., FIGS. 121 to 131).

[0426] The dirt collection chamber 132 may have any position relative to the air treatment chamber 128, such as forward of the air treatment chamber 128 (see e.g., FIGS. 16, 119 to 131, and 142), rearward of the air treatment chamber 128 (see e.g., FIG. 106), or below the air treatment chamber 128 (see e.g., FIGS. 2, 53, 67, 79, and 93). Additionally, the dirt collection chamber 132 may be any combination of positions relative to the air treatment chamber 128, such as at least partially forward and below the air treatment chamber 128 (see e.g., FIGS. 8 to 13, and 138), at least partially rearward and below the air treatment chamber 128 (see e.g., FIGS. 7 and 136), or any other combination.

[0427] When the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the dirt collection chamber 132 may have an upper end, a lower end, a front end, and a rear end. At least one of the upper end, lower end, front end, and rear end of the dirt collection chamber 132 may be bound, at least in part, by a portion of the treatment chamber sidewall 172. This may depend on the position of the dirt collection chamber 132 relative to the air treatment chamber 128. For example, if the dirt collection chamber 132 is below the air treatment chamber 128, at least part of the upper end of the dirt collection chamber 132 may be bound by a portion of the treatment chamber sidewall 172 at the lower end of the air treatment chamber 128 (see e.g., FIGS. 2, 15, 53, 67, 79, and 93). As another example, if the dirt collection chamber 132 is forward of the air treatment chamber 128, at least part of the rear end of the dirt collection chamber 132 may be bound by a portion of the treatment chamber sidewall 172 at the front end of the air treatment chamber 128 (see e.g., FIGS. 16, 89, 119 to 131, and 142). Similarly, if the dirt collection chamber 132 is rearward of the air treatment chamber 128, at least part of the front end of the dirt collection chamber 132 may be bound by a portion of the treatment chamber sidewall 172 at the rear end of the air treatment chamber 128 (see e.g., FIGS. 7 and 106).

[0428] In any such embodiments, at least a portion of the treatment chamber sidewall 172 that partially bounds the dirt collection chamber 132 may be the optional moveable portion 188 of the treatment chamber sidewall 172. In this way, the contents of the dirt collection region 130 within the air treatment chamber 128 may be emptied into the dirt collection chamber 132 by moving the moveable portion 188 from the closed position to the open position.

[0429] The remainder of the dirt collection chamber 132 may be bound by a dirt chamber sidewall 194. The dirt chamber sidewall 194 may include a front wall 196 at the front end, a bottom wall 198 at the lower end, and laterally opposed side walls. Optionally, if the hand vacuum 100 includes one or more air outlet ducts 208 (described in greater detail in the subsequent section) extending along the exterior surface of one or both end walls 174 of the air treatment chamber 128, the dirt collection chamber 132 may extend outwardly (e.g., transversely) beyond each end wall 174 of the air treatment chamber having an air outlet duct 208 thereon. In this way, the laterally opposed side walls of the dirt collection chamber 132 may be flush with the air outlet ducts 208, which may provide increased dirt collection capacity without increasing the overall size of the hand vacuum 100.

[0430] If the dirt collection chamber 132 is partially bound by a rounded portion of the treatment chamber sidewall 172, one or more crevices may be formed within the dirt collection chamber 132 at the intersection of the treatment chamber sidewall 172 and the dirt chamber sidewall 194. Such crevices may be formed where the junction of treatment chamber sidewall 172 and the dirt chamber sidewall 194 forms an acute angle. Accordingly, an enclosing wall 200 may be provided to seal each crevice so as to form a closed volume. For example, as shown in FIGS. 15 and 16, an enclosing wall 200 is provided at the junction of the bottom wall 198 and the treatment chamber sidewall 172, and at the junction of the front wall 196 and the treatment chamber sidewall 172, respectively (see also e.g., FIGS. 119 and 121). Sealing each crevice in a closed volume using the enclosing wall 200 may advantageously prevent the buildup of particulate matter that may become stuck within the tight crevice.

[0431] In any embodiment, the dirt collection chamber 132 may include one or more openable portions. The openable portions may provide one or more means of emptying the dirt collection chamber 132 and transferring the particulate matter collected therein (and optionally in the dirt collection region 130 of the air treatment chamber 128) to an exterior of the hand vacuum 100, such as a refuse bin. For example, the front wall 196 of the dirt collection chamber 132 may include a front door 202 that is moveably connected (e.g., pivotably or translatably) to, e.g., the dirt chamber sidewall 194 by a mount 190 (see e.g., FIGS. 15A to 15B, 17, 20A to 20B, 20C to 20D, 21A to 21B, 28, 33A to 33B, 48, 73, 75, 81, 113, 119 to 120, 130, 132, and 138). Additionally, or alternatively, the bottom wall 198 of the dirt collection chamber 132 may include a bottom door 204 that is moveably connected to the dirt chamber sidewall 194 by a mount 190 (see e.g., FIGS. 16A to 16B, 19, 52, 58, 68, 107, 119 to 131, 132, 136, and 142). Any other portion(s) of the dirt chamber sidewall 194 may be openable, such as the upper end of the dirt collection chamber 132 (see e.g., FIG. 107) or the rear end of the dirt collection chamber 132 (see e.g., FIGS. 92 and 134). As shown in FIGS. 92 and 134, opening the rear end of the dirt collection chamber 132 may include removing the air treatment assembly 124 from the main body 118 or, alternatively, moving (e.g., pivoting, translating, etc.) all or part of the air treatment assembly 124 relative to the main body 118. It will be appreciated that one openable portion may be used to empty collected dirt into a docking station, and another may be used by a user to manually empty collected dirt into, e.g., a refuse bin.

[0432] The mount 190 may be any suitable mechanism for moveably connecting the openable portion to the rest of dirt chamber sidewall 194. For example, the mount 190 may be a rotatable mount such as a hinge (see e.g., FIGS. 17 to 20), a translatable mount such as sliding tracks (see e.g., FIGS. 21A to 21B), and the like. Any other moveable connection type may be used.

[0433] The mount 190 may be provided at any suitable location relative to the openable portion. The location of the mount 190 may depend, for example, on the desired location of the openable portion of the dirt collection chamber 132 and / or the desired directional motion thereof. For example, with respect to the front door 202, the mount 190 may be provided at the front end 108 of the hand vacuum 100. When the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, a rotatable mount 190 may be provided proximate an upper end of the front door 202 such that the front door 202 may rotate forwardly and upwardly (see e.g., FIGS. 15A to 15B, 17, 20A to 20B, 20C to 20D, 21A to 21B, 28, 33B, 48, 75, 81, 113, and 132). Alternatively, the rotatable mount 190 may be provided proximate a lower end of the front door 202 such that the front door 202 may rotate forwardly and downwardly (see e.g., FIGS. 73, 120, 130, and 138). Further alternatively, a translatable mount 190 may be provided proximate the laterally opposed side walls of the dirt collection chamber 132 such that the front door 202 may translate forwardly (see e.g., FIG. 21A).

[0434] As another example, with respect to the bottom door 204, a rotatable mount 190 may be provided at the lower end 114 of the hand vacuum 100. When the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the rotatable mount 190 may be provided proximate a rear end of the bottom door 204 such that the bottom door 204 may rotate downwardly and rearwardly (see e.g., FIGS. 15A to 15B, 19, 52, 58, 68, 107, 119 to 131, 132, 136, and 142). Alternatively, the rotatable mount 190 may be provided proximate a front end of the bottom door 204 such that the bottom door 204 may rotate downwardly and forwardly (see e.g., FIG. 18B). Further alternatively, a translatable mount 190 may be provided proximate the laterally opposed side walls of the dirt collection chamber 132 such that the bottom door 204 may translate downwardly.

[0435] The openable portion (e.g., front door 202 and / or bottom door 204) may be moveable between a closed position in which the dirt collection chamber 132 is closed and an open position in which the dirt collection chamber 132 is opened. In the closed position, the hand vacuum 100 may be operable to clean a surface.

[0436] Optionally, the openable portion can be secured in the closed position using any suitable type of locking mechanism, including a latch mechanism that can be released by a user and / or a docking station. The actuator for opening / releasing the openable portion can be provided on the air treatment assembly 124 itself, on the main body 118, or on any other portion of the hand vacuum 100 and / or on a docking station.

[0437] In such embodiments, where the openable portion is the front door 202, the user may empty the dirt collection chamber 132 by holding the handle 122 with one hand and positioning the front door 202 over a refuse bin (i.e., with the hand vacuum 100 oriented with the rear end 110 at an elevation above the front end 108), and actuating the locking mechanism (e.g., with the same hand or the other hand) to allow the front door 202 to move to the open position and the contents of the dirt collection chamber 132 to fall forwardly from the hand vacuum 100 into the refuse bin below through the open front door 202.

[0438] Similarly, where the openable portion is the bottom door 204, the user may empty the dirt collection chamber 132 by holding the handle 122 with one hand and positioning the bottom door 204 over a refuse bin (i.e., with the hand vacuum 100 oriented with the upper end 112 at an elevation above the lower end 114), and actuating a locking mechanism to allow the bottom door 204 to move to the open position such that the collected particulate matter may fall downwardly from the hand vacuum 100 into the refuse bin below.

[0439] In addition to being manually moveable, or in alternate embodiments, the front door 202 and / or bottom door 204 may be automatically moveable. In such embodiments, each automatically moveable door may alternatively be referred to as an automatic emptying door. That is, in some embodiments, the front door 202 and / or bottom door 204 may itself be an automatic emptying door (see e.g., FIGS. 53, 57, 67, 89 to 90, 93 to 94, 119 to 131, and 141). Alternatively, in some embodiments, the front wall 196 and / or bottom wall 198 of the dirt collection chamber 132 may optionally include an automatic emptying door 206 (described subsequently) moveable independent of the front door 202 and bottom door 204 (see e.g., FIGS. 18A to 18C, 20A to 20B, and 21A to 21B). In any such embodiments, the automatic emptying door 206 may be automatically moveable between a closed position in which the dirt collection chamber 132 is closed and an open position in which the dirt collection chamber 132 is opened.

[0440] Optionally, in embodiments having a dedicated automatic emptying door 206, the front door 202 and / or bottom door 204 may also be automatically moveable separate from or concurrently with the automatic emptying door 206. Conversely, in embodiments having a dedicated automatic emptying door 206, the automatic emptying door 206 may be manually moveable separate from or concurrently with the front door 202 and / or bottom door 204.

[0441] Optionally, a door of the hand vacuum 100 may “automatically” move between its open and closed positions upon docking to a docking station (also referred to as an automatic emptying device) at the instigation of an operating system of the docking station or hand vacuum 100, upon manual actuation of an automatic emptying switch, or any upon any other suitable instigating means.General Description of an Air Outlet Duct

[0442] The hand vacuum 100 may include an air outlet duct 208 downstream of each chamber air outlet port 178. In use, the airflow path 138 may pass through each porous member 180 to separate at least some particulate matter from the air as it travels to each corresponding chamber air outlet port 178. The airflow path 138 may then pass through each chamber air outlet port 178 and into each corresponding air outlet duct 208.

[0443] The air outlet duct(s) 208 may be positioned outwardly from the first and second end walls 174 of the air treatment chamber 128 of the first cleaning stage 1261 (optionally the only cleaning stage 126) such that the central axis 170 intersects each air outlet duct 208. For example, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 generally horizontal, each air outlet duct 208 may be positioned laterally (transversely) outwardly of the air treatment chamber 128 (see e.g., FIGS. 3 to 4, 22 to 27, 34 to 35, 124, and 129), or vertically (i.e., upwardly or downwardly) outwardly of the air treatment chamber 128 (see e.g., FIGS. 113, 117, and 132).

[0444] Each air outlet duct 208 may extend generally rearwardly (i.e., toward the rear end 110 of the hand vacuum 100) from the air treatment chamber 128 through the air treatment assembly 124 (or along an outer wall of the air treatment assembly) toward the main body 118 (see e.g., FIGS. 3 to 4, 22 to 27, 34 to 35, 113, 117, and 132). Alternatively, each outlet duct 188 may extend generally downwardly (i.e., toward the lower end 114 of the hand vacuum 100) from the air treatment chamber 128 through the air treatment assembly 124 (see e.g., FIG. 37) or along an outer wall of the air treatment assembly.

[0445] Each air outlet duct 208 may guide the treated air exiting each chamber air outlet port 178 downstream from a chamber air outlet port 178 of the air treatment chamber 128 to the suction motor 140 and / or to any intervening elements. For example, each air outlet duct 208 may guide the treated air to one or more second stage air treatment chambers 1282 of a second cleaning stage 1262 of the air treatment assembly 124 and / or to an optional pre-motor filter 148.

[0446] Optionally, each air outlet duct 208 may be sized to include one or more elements within an interior thereof such that the treated air guided through the air outlet duct 208 may also be guided through the one or more elements therein. For example, each air outlet duct 208 may be sized to house a pre-motor filter 148. In such embodiments, the pre-motor filter housing 152 may be integrally formed as part of the air outlet duct 208 or removably positioned therein.

[0447] Optionally, each air outlet duct 208 may protrude outwardly from the air treatment chamber and / or main body 118. That is, each air outlet duct 208 may extend along an exterior of the corresponding end wall 174 of the air treatment chamber 128 and / or an exterior of the main body housing 120. For example, in the embodiment illustrated in FIGS. 3 and 4, each air outlet duct 208 extends along an exterior surface of the corresponding end wall 174 of the air treatment chamber 128 and an interior surface of an outer wall of the air treatment assembly (see also e.g., FIGS. 30, 31, 37). Accordingly, the width of the outlet duct 208 increases the width of the air treatment assembly. Alternatively, as discussed in more detail subsequently, each air outlet duct 208 may not increase the width of the air treatment assembly 124 and / or main body 118 as the end wall 174 of the air treatment chamber may extend inwardly in the downstream direction of air flow through the duct 208 (see e.g., FIGS. 25, 27, 34, and 35).

[0448] Optionally, the air treatment assembly 124 may be generally rectangular in cross-sectional shape in a plane that extends along the central axis 170 and intersects the lateral sides of the air treatment chamber 128 (e.g., taken along line 3-3 in FIG. 1). In such embodiments, the air treatment chamber 128 and the air outlet duct(s) 208 may be correspondingly shaped to produce the generally rectangular cross-sectional shape of the air treatment assembly 124. For example, both the air treatment chamber 128 and each air outlet duct 208 may be generally rectangular in cross-sectional shape (see e.g., FIGS. 3, 22 to 24, and 26). As another example, as discussed in more detail subsequently, the air treatment chamber 128 may be generally trapezoidal and each air outlet duct 208 may be generally triangular (e.g., right-angle triangle) in cross-sectional shape (see e.g., FIGS. 25, 27, 34, and 35). Any other corresponding shapes may be used to produce the generally rectangular cross-sectional shape. This may produce generally uniform outer dimensions of the air treatment assembly 124 of the hand vacuum 100.

[0449] Alternately, it will be appreciated that air may exit the chamber air outlet port 178 and enter a pre-motor filter housing or a second cleaning stage, as discussed subsequently.General Description of a Second Stage Air Treatment Chamber

[0450] Optionally, the cleaning stage 126 may be a first cleaning stage 1261 and the air treatment assembly 124 may include a second cleaning stage 1262 downstream of the first cleaning stage 1261. The second cleaning stage 1262 may be arranged in series with the first cleaning stage 1261 such that air exiting each first stage air treatment chamber 1281 of the first cleaning stage 1261 flows into one or more second stage air treatment chambers 1282 of the second cleaning stage 1262. As discussed previously, each second stage air treatment chamber 1282 may include an internal second stage dirt collection region 1302. Additionally, or alternatively, the second cleaning stage 1262 may include one or more external second stage dirt collection chambers 1322. Any design previously discussed may be used for the second stage air treatment chambers 1282.

[0451] In some embodiments, the second cleaning stage 1262 may be rearward of the first cleaning stage 1261. In such embodiments, the airflow path 138 may travel rearwardly from each chamber air outlet port 178 of the first stage air treatment chamber(s) 1281 through each air outlet duct 208 to the second stage air treatment chamber(s) 1282 (see e.g., FIGS. 28, 29A, 33 to 35, 113, 117, 132, and 142). Alternatively, the airflow path 138 may travel rearwardly from each chamber air outlet port 178 of the first stage air treatment chamber(s) 1281 directly to the second stage air treatment chamber(s) 1282 (see e.g., FIGS. 68 to 69, 72 to 73, 75 to 76, and 81 to 82).

[0452] Additionally, or alternatively, in some embodiments the second cleaning stage 1262 may be positioned laterally and / or vertically outwardly of the first cleaning stage 1261. In such embodiments, the central axis 170 of the first stage air treatment chamber 1281 may intersect the second cleaning stage 1262 and may intersect one or more of the second stage air treatment chamber 1282. The airflow path 138 may therefore travel outwardly through each chamber air outlet port 178 of the first stage air treatment chamber 1281 into each second stage air treatment chamber 1282. For example, if the first stage air treatment chamber 1281 is a transverse cyclone, the airflow path 138 may travel laterally outwardly through each chamber air outlet port 178 of the first stage air treatment chamber 1281 to a respective second stage air treatment chamber 1282 (see e.g., FIGS. 30 and 31). As another example, if the first stage air treatment chamber 1281 is a vertical cyclone, the airflow path 138 may travel vertically (i.e., upwardly and / or downwardly) outwardly through each chamber air outlet port 178 of the first stage air treatment chamber 1281 to a respective second stage air treatment chamber 1282 (see e.g., FIGS. 55, 60, and 64).

[0453] Optionally, the second cleaning stage 1262 may be positioned laterally / vertically outwardly of the first cleaning stage 1261 and a third cleaning stage 1263 may be rearward of the first and second cleaning stages 1261, 1262. In such embodiments, the airflow path 138 may travel laterally / vertically outwardly through each chamber air outlet port 178 of the first stage air treatment chamber 1281 to a respective second stage air treatment chamber 1282, and subsequently rearwardly from a chamber air outlet of each second stage air treatment chamber 1282 to one or more third stage air treatment chamber(s) 1283. The airflow path 138 may travel directly rearward from each second stage air treatment chamber 1282 to the one or more third stage air treatment chamber(s) 1283 or, optionally, travel rearwardly through an air outlet duct 208 positioned outward of each second stage air treatment chamber 1282 (see e.g., FIGS. 30 and 31).

[0454] Optionally, the second cleaning stage 1262 may be positioned rearward of the first cleaning stage 1261 and a third cleaning stage 1263 may be rearward of the second cleaning stage 1262. In such embodiments, the airflow path 138 may travel rearwardly from the first cleaning stage 1261 to the second cleaning stage 1262, and subsequently rearwardly from each the second cleaning stage 1262 to the third cleaning stage 1263.

[0455] The second cleaning stage 1262 may include one second stage air treatment chamber 1282 (see e.g., FIGS. 28, 29A, and 142) or, alternately, a plurality of second stage air treatment chambers 1282 arranged in parallel with each other (see e.g., FIGS. 30, 31, 33 to 35, 55, 60 and 62, 64, 67 to 69, 72 to 73, 75 to 76, 81 to 82, 112 to 113, 116 to 117, and 132).

[0456] As shown in these embodiments, each second stage air treatment chamber 1282 may include at least one chamber air inlet 210. For example, in the embodiments illustrated in FIGS. 28, 29A, 31, 55, 60 and 62, 72 to 73, and 117, each second stage air treatment chamber 1282 includes one chamber air inlet 210. In the embodiments illustrated in FIGS. 30, 34 to 35, 64, 67 to 69, 75 to 76, 81 to 82, 113, 132, and 142 each second stage air treatment chamber 1282 includes a plurality of chamber air inlets 210.

[0457] The chamber air inlet(s) 210 may be provided at any location. For example, each chamber air inlet 210 may be provided in a sidewall of the second stage air treatment chamber 1282 and may permit air to travel from an exterior space (e.g., a header or plenum) extending partially or fully around the second stage air treatment chamber 1282 to an interior thereof (see e.g., FIGS. 28, 29A, 34 to 35, 55, 60 and 62, 64, 67 to 69, 72 to 73, 75 to 76, 81 to 82, 113, 117, 132, and 142). In such embodiments, as shown, the plurality of chamber air inlets 210 may be spaced circumferentially about the second stage air treatment chamber 1282. Alternatively, each second stage air treatment chamber 1282 may be in direct fluid communication with a chamber air outlet of the first stage air treatment chamber 1282 such that the chamber air inlet(s) 210 may permit air to travel directly from an interior of the chamber air outlet into the interior of the second stage air treatment chamber 1282. For example, in the embodiment shown in FIG. 30, a header positioned radially outwardly of a plurality of chamber air inlets 210 are spaced circumferentially about the chamber air outlet of the first stage air treatment chamber 1281 within the interior of the header. As another example, in the embodiment shown in FIG. 31, a single chamber air inlet 210 is directly facing the chamber air outlet of the first stage air treatment chamber 1281.

[0458] As further shown in these embodiments, each second stage air treatment chamber 1282 may include at least one chamber air outlet 212. Treated air exiting each chamber air outlet 212 may travel downstream from the second stage air treatment chamber 1282 to the suction motor 140 through any intervening elements, such as air outlet duct(s) 208, one or more additional air treatment chambers 128 of one or more subsequent cleaning stages 126 and / or the pre-motor filter 148.

[0459] Each second stage air treatment chamber 1282 may be cyclonic (see e.g., FIGS. 28, 30, 34 to 35, 55, 60 and 62, 64, 67 to 69, 72 to 73, 75 to 76, 81 to 82, 113, 117, 132, and 142). For example, as shown in these embodiments, the second cleaning stage 1262 may include at least one cyclonic second stage air treatment chamber 1282, such as one cyclonic second stage air treatment chamber 1282 (see e.g., FIG. 142), or a plurality of cyclonic second stage air treatment chambers 1282 arranged in parallel with each other. The cyclonic second stage air treatment chamber(s) 1282 may be any shape such as cylindrical (see e.g., FIGS. 30, 113, 117, and 142) or frusto-conical (see e.g., FIGS. 28, 33 to 35, 55, 60, 64, 72, 76, 82, and 132). The second stage air treatment chambers 1282 may have any orientation when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 generally horizontal, such as horizontal (see e.g., FIGS. 29A, 30, 31, 33 to 35, 55, 60, 112, 115, and 142), transverse (see e.g., FIG. 133), vertical, angled (see e.g., FIG. 64), or a combination thereof (see e.g., FIGS. 28, 67 to 69, 72 to 73, 75, and 81). Optionally, the second stage air treatment chambers 1282 may protrude beyond the treatment chamber sidewall 172 and / or end walls 174 of the first stage air treatment chamber 1281 (see e.g., FIGS. 72, 112, 115, and 133).

[0460] Each second stage air treatment chamber 1282 may alternatively be non-cyclonic (see e.g., FIGS. 29A to 29B and 31). For example, as shown in these embodiments, the second cleaning stage 1262 may include a plurality of non-cyclonic second stage air treatment chambers 1282 arranged in parallel with each other. Optionally, as in the illustrated embodiments, the non-cyclonic second stage air treatment chambers 1282 may be spinning disc separators (e.g., a PL turbine) or a non-cyclonic momentum separator as discussed previously.

[0461] The cyclonic second stage air treatment chambers 1282 may separate particulate matter from the airflow by cyclonic momentum separation similar to as described with respect to the first stage air treatment chamber 1281. That is, in the embodiments shown, particulate matter separated from the air flow by a cyclonic airflow path 138 may be thrown through one or more dirt outlets 214 of the second stage air treatment chamber 1282 and / or fall therethrough under the force of gravity to an external dirt collection chamber 132.

[0462] The non-cyclonic second stage air treatment chambers 1282 may separate particulate matter from the airflow by momentum separation (i.e., directional changes in the airflow as described previously). Alternatively, referring to FIGS. 29A to 29B and 31, if the non-cyclonic second stage air treatment chamber 1282 is a spinning disc separator, each spinning disc separator may include a shaft 216 rotatably mounted within the second stage air treatment chamber 1282. Each spinning disc separator may further include one or a plurality of spaced apart discs 218 rigidly connected to the shaft 216. The discs 218 may have a shaft opening 220 for non-rotational mounting to the shaft 216, with the shaft opening 220 supported, e.g., on a plurality of arms and surrounded by a central opening 222. In use, the airflow path 138 may pass through one or more central opening 222 of the discs 218 between the arms and the shaft 216. Optionally, the central opening 222 may get successively narrower in diameter for each disc 218 moving in the downstream direction.

[0463] Each spinning disc separator may further include an upstream fan 2241 rigidly connected to the shaft 216 proximate the chamber air inlet 210 and a downstream fan 2242 rigidly connected to the shaft 216 proximate the chamber outlet 208. The discs 218 may be disposed between the upstream and downstream fans 224. In the illustrated embodiment, the airflow generated by the suction motor 140 may cause the fans 224 to rotate, which may thereby rotate the shaft 216 and the discs 218 thereon (i.e., a turbine-driven spinning disc separator). The upstream fan 2241 may also assist in drawing air into the second stage air treatment chamber 1282 and / or the downstream fan 2242 may also assist in expelling air from the second stage air treatment chamber 1282. Alternatively, an independent motor (not shown) may be provided to directly rotate the shaft 216 and the discs 218 and fans 224 thereon (i.e., a motor-driven spinning disc separator). Optionally, in the motor-driven embodiment, the fans 224 may be omitted.

[0464] Accordingly, the airflow path 138 through each spinning disc separator may pass through the chamber air inlet 210, the optional upstream fan 2241, the central opening 222 in each disc 218, the downstream fan 2242, and the chamber air outlet 212. Due to the rotation of the discs 218, the airflow through the central opening 222 may be drawn along the downstream side of each disc 218 and travel radially outwardly to an outer edge thereof. During this process, dirt particles in the airflow may tend to separate from the airflow due to the centrifugal forces exerted upon the particles. As such, the particles may be thrown radially outwardly to the walls of the second stage air treatment chamber 1282 before the airflow separates from the downstream side of the disc 218 and proceeds to the central opening 222 of the next disc 218 (or the chamber air outlet 212, from the final disc 218). The discs 218 may be spaced apart from the walls of the second stage air treatment chamber 1282 such that the separated dirt particles may fall along the walls to a lower end of the second stage air treatment chamber 1282 and through the dirt outlet 214 at a lower end thereof. It will be appreciated that any PL turbine design may be used.General Description of Second Stage Dirt Collection

[0465] The second cleaning stage 1262 may include a second stage dirt collection region 1302 that is internal to each second stage air treatment chamber 1282 and / or each second stage air treatment chamber 1282 in the second cleaning stage 1262 may have a dirt outlet 214 in communication with a second stage dirt collection chamber 1322 that is external to each second stage air treatment chamber 1282 similar to that described with respect to the first stage air treatment chamber 1281. The dirt outlet 214 may be a slot outlet provided in the sidewall or end wall of each second stage air treatment chamber 1282 as described previously with respect to the first stage air treatment chamber 1281. The second stage dirt collection chamber 1322 may have any position relative to the second stage air treatment chamber(s) 1282 such as below thereof (see e.g., FIGS. 30, 31, 33B, 55, 60, 64, 67 to 69, and 132), forward thereof (see e.g., FIGS. 72 to 73, and 75 to 76), or both below and forward thereof (see e.g., FIGS. 28, 29A, 33A, 81, 113, 117, and 142).

[0466] Optionally, the dirt outlet 214 of each second stage air treatment chamber 1282 in the second cleaning stage 1262 may be in communication with a respective second stage dirt collection chamber 1322. That is, each second stage air treatment chamber 1282 may have an individual corresponding second stage dirt collection chamber 1322. For example, as shown in the embodiments illustrated in FIGS. 30 and 31, separated dirt particles may be discharged through the dirt outlet 214 of each second stage air treatment chamber 1282 into a corresponding second stage dirt collection chamber 1322. Each second stage dirt collection chamber 1322 may be adjacent to the first stage dirt collection chamber 1321 such as laterally beside (as exemplified), rearward, or below, for example. While the second stage dirt collection chambers 1322 are shown below the second stage air treatment chambers 1282, it will be appreciated that the second stage dirt collection chambers 1322 may be at any other position relative to the corresponding second stage air treatment chamber 1282 (e.g., forward) as described with respect to the first stage dirt collection chamber 1321.

[0467] Optionally, the dirt outlet 214 of each second stage air treatment chamber 1282 in the second cleaning stage 1262 may be in communication with a single second stage dirt collection chamber 1322. That is, where one or more second stage air treatment chambers 1282 are present, each second stage air treatment chamber 1282 may share a single common second stage dirt collection chamber 1322. For example, separated dirt particles may be discharged through the dirt outlet 214 of each second stage air treatment chamber 1282 into a single second stage dirt collection chamber 1322 (see e.g., FIGS. 33 to 35, 55, 60, 64, 67 to 69, 72 to 73, 75 to 76, 81, 113, 117, 132, and 142). The single second stage dirt collection chamber 1322 may be at any location relative to the second stage air treatment chambers 1282. For example, the second stage dirt collection chamber 1322 may be below the second stage air treatment chamber(s) 1282 (see e.g., FIGS. 33A, 67 to 69, and 132) and, optionally, at least partially below the first stage air treatment chamber 1281 (see e.g., FIGS. 33B, 81, 113, 117, and 142). Alternatively, the common second stage dirt collection chamber 1322 may be internal to the first stage air treatment chamber 1281. For example, the second stage air treatment chambers 1282 may discharge separated dirt particles into a dirt collection conduit 226 extending through the chamber air outlet of the first stage air treatment chamber 1281 and interior to the porous member 180 (see e.g., FIGS. 55, 60, 64, 72 to 73, 75 to 76). In such embodiments, the airflow path 138 may pass through the screen of the porous member 180 and through the chamber air outlet port 178 in the annular space around the dirt collection conduit 226 defining the common second stage dirt collection chamber 1322.

[0468] Optionally, the dirt outlet 214 of each second stage air treatment chamber 1282 in the second cleaning stage 1262 may be in communication with the dirt collection chamber 132 of the first cleaning stage 1261. That is, the first stage air treatment chamber 1281 and each second stage air treatment chamber 1282 may share a single common dirt collection chamber 132. For example, separated dirt particles may be discharged through the dirt outlet 192 of the first stage air treatment chamber 1281 and through the dirt outlet 214 of each second stage air treatment chamber 1282 into the same dirt collection chamber 132 (see e.g., FIGS. 28 and 29A). Separated dirt particles may be discharged through the dirt outlet 214 of each second stage air treatment chamber 1282 directly into the common dirt collection chamber 132 (see e.g., FIG. 29A) or indirectly through an intervening dirt collection passage leading to the common dirt collection chamber 132 (see e.g., FIG. 28). The dirt collection passage may be through an annular volume around the second stage air treatment chambers 1282 (see e.g., FIG. 81) or through a volume defined between the second stage air treatment chambers 1282 (see e.g., FIG. 28). Dirt particles that enter the dirt collection passage may fall, such as under the force of gravity, into the common dirt collection chamber 132.

[0469] The second cleaning stage 1262 may be emptied by any suitable means. For example, the second stage dirt collection region(s) 1302 and / or dirt collection chamber(s) 1322 may be emptied separately from the first cleaning stage 1261 by any means described with respect to the first cleaning stage 1261. In such embodiments, the first and second cleaning stages 126 may each have independently actuatable emptying means (e.g., openable portions such as described with respect to the front and bottom doors 202, 204), which may be used to empty the first and second cleaning stages 126 in sequence. For example, the second stage dirt collection chamber(s) 1322 may have an independently actuatable bottom door such as described with respect to the bottom door 204 (see e.g., FIGS. 60 and 69), or an independently actuatable front door such as described with respect to the front door 202, which may comprise a rear end of the first cleaning stage 1261 (see e.g., FIG. 116).

[0470] Optionally, the second stage dirt collection chamber(s) 1322 may be emptied simultaneously with the first stage dirt collection chamber(s) 1321. For example, in the example embodiments described herein, opening the front door 202 (see e.g., FIGS. 73, 75, 81, and 113) and / or bottom door 204 (see e.g., FIGS. 58, 68, and 142) of the first stage dirt collection chamber 1321 may concurrently open the first cleaning stage 1261 (e.g., one or both of the first stage air treatment chamber 1281 and the first stage dirt collection chamber 1321) and the second cleaning stage 1262 (e.g., one or both of the second stage air treatment chamber(s) and the second stage dirt collection chamber(s) 1322). In such embodiments, the front door 202 of the first stage dirt collection chamber 1321 may also be an openable portion (e.g., a front door) of, e.g., the second stage dirt collection chamber(s) 1322 (see e.g., FIGS. 73, 81, 113A, and 117). Similarly, the bottom door 204 of the first stage dirt collection chamber 1321 may also be an openable portion (e.g., a bottom door) of, e.g., the second stage dirt collection chamber(s) 1322 (see e.g., FIGS. 58, 113B, 117B, 132, and 142). Alternatively, one of the doors 202, 204 of the first stage dirt collection chamber 1321 may be operatively connected to an openable portion of the second stage dirt collection chamber(s) 1322. In such embodiments, moving the front door 202 between the open and closed positions may concurrently move the openable portion of the second stage dirt collection chamber(s) 1322 (see e.g., FIG. 75) and / or moving the bottom door 204 between the open and closed positions may concurrently move the openable portion of the second stage dirt collection chamber(s) 1322 (see e.g., FIG. 68). As exemplified, a single integral member may concurrently open both stages.General Description of a Suction Motor

[0471] The motor used in the hand vacuum 100 may be of any suitable design and configuration, and ay any location in the air flow path through the surface cleaning apparatus, that is sufficient to impart a desired air flow through the hand vacuum 100. For example, motor may be a suction motor 140 that may include a fan and / or impeller (i.e., a motor and fan assembly), which rotates about a motor axis of rotation 216 to help generate the desired air flow.

[0472] The suction motor 140 may have any orientation within the main body 118. For example, within the main body housing 120, when the hand vacuum 100 is oriented with the upper end 112 above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the motor axis of rotation 228 may be oriented longitudinally horizontally extending in a common direction with the hand vacuum axis 116 (see e.g., FIGS. 2, 7 to 13, 34, 35A, 52, 55, 64, 75, 89, 93, 106, 113, 130, 136, 139, and 142), laterally horizontally (see e.g., FIG. 35B), or vertically (see e.g., FIGS. 46, 60, 72, 79, 81, 117, and 132). Accordingly, within the main body housing 120, the motor axis 228 may be parallel to the hand vacuum axis 116 (i.e., when oriented longitudinally horizontally) or transverse to the hand vacuum axis 116 (i.e., when oriented laterally horizontally or vertically). Alternatively, as described in greater detail subsequently herein, within the handle 122, and when the hand vacuum 100 is oriented with the upper end 112 above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the motor axis 228 may be oriented generally vertically at about the same angle as the handle 122 (see e.g., FIGS. 119 to 121, 123, 125, and 126), or generally horizontally (see e.g., FIG. 142). Any other orientation may be possible.

[0473] As shown in these embodiments, the suction motor 140 may be positioned in the motor housing 142 rearward of the air treatment assembly 124. The motor housing 142 may be positioned in the main body housing 120 or the handle 122 or, alternatively, integrally formed with the main body housing 120 or the handle 122.

[0474] The motor housing 142 may be at any position within the main body housing 120, such as proximate the upper end 112 of the hand vacuum 100 (see e.g., FIGS. 60, 72, 79, 81, 93, and 130), proximate the lower end 114 of the hand vacuum 100 (see e.g., FIGS. 15A, 38, 44, 46, and 47), or at any other location therebetween, such as generally centered therebetween (see e.g., FIGS. 52, 75, 89, 117, 132, and 138). Optionally, at least part of the motor housing 142 may extend rearwardly from the main body housing 120. Accordingly, in embodiments where the motor housing 142 is positioned proximate the upper end 112, at least part of the motor housing 142 may form an upper rearwardly extending portion of the main body 118 (see e.g., FIGS. 33A to 33B, 40, 43, 55, and 64). Similarly, in embodiments where the motor housing 142 is positioned proximate the lower end 114, at least part of the motor housing 142 may form a lower rearwardly extending portion of the main body 118 (see e.g., FIGS. 2, 7 to 13, 15B, 16, 39, 41, 42, 45, 106, 113, and 136).

[0475] The motor housing 142 may be at any position within the handle 122, such as within a hand grip portion 232, 234, a lower member 240, or a finger guard 241 of the handle 122. For example, in the embodiments illustrated in FIGS. 119 to 121, 123, 125, 126, and 142, the motor housing 142 is part of the finger guard 241.General Description of a Pre-Motor Filter

[0476] Optionally, one or more pre-motor filters 148 may be provided in the hand vacuum 100 at any position in the airflow path 138 downstream from the air treatment chamber(s) 128 of the final cleaning stage 126 and upstream from the suction motor 140.

[0477] For example, the pre-motor filter 148 may be positioned in the pre-motor filter housing 152 in the main body 118 rearward of the air treatment assembly 124 (see e.g., FIG. 2) or above the air treatment assembly (see e.g., FIGS. 55 and 60). Optionally, the pre-motor filter 148 may be positioned annularly around the suction motor 140 with the suction motor 140 partially or fully nested therein such that the motor housing 142 may also be the pre-motor filter housing 152. This configuration may advantageously provide a more compact hand vacuum 100.

[0478] Alternatively, the pre-motor filter 148 may be positioned in the air treatment assembly 124, such as fully nested in the porous member 180 of the air treatment chamber 128 of any cleaning stage 126, fully nested between a plurality of air treatment chambers 128 of any cleaning stage 126 (see e.g., FIGS. 112 to 113), in the air outlet duct 208 outward of the air treatment chamber 128, or below the air treatment chamber 128 (see e.g., FIGS. 36 to 37). As shown in FIGS. 36 and 37, where the pre-motor filter 148 is below the air treatment chamber 128, the pre-motor filter housing 152 may be positioned below the air treatment chamber 128 (and optionally above the dirt collection chamber 132) and in communication with the air treatment chamber 128 via the air outlet duct(s) 208.

[0479] Further alternatively, the pre-motor filter 148 may be positioned partially in the main body 118 and partially in the air treatment assembly 124. For example, the pre-motor filter 148 may extend from within the main body housing 120 through the chamber air outlet to be partially nested in the porous member 180 of the air treatment chamber 128 or to be partially nested between a plurality of air treatment chambers 128 (see e.g., FIGS. 81 to 82). Similarly, the pre-motor filter 148 may extend between the portion of the air outlet duct 208 in / along the main body 118 and the portion of the air outlet duct 208 along the air treatment chamber 128.

[0480] If the air treatment assembly is removable, then the pre-motor filter 148 may be removable with the air treatment assembly 124 and a rear end of the air treatment assembly may house the pre-motor filter 148. Alternatively, the pre-motor filter 148 may remain in place when the air treatment assembly 124 is removed, and a forward end of the main body 118 may house the pre-motor filter 148.

[0481] The pre-motor filter 148 may be formed from foam or any other suitable physical, porous filter media. For example, the pre-motor filter 148 may be formed from cloth or paper, such as a pleated filter (see e.g., vertically pleated filter of FIGS. 142 to 143 and horizontally pleated filter of FIGS. 144 to 145). Optionally, a felt filter layer can be provided on one side of the pre-motor filter 148, and preferably is positioned adjacent the downstream side (see e.g., FIGS. 28 and 29A) but may be provided on the upstream side.

[0482] The pre-motor filter 148 may have any suitable shape, such as cylindrical (see e.g., FIGS. 2, and 112 to 113), frusto-conical (see e.g., FIGS. 72 to 73, and 79 to 82), rectangular (see e.g., FIGS. 28, 29A, 33, and 37) or a generally flat, slab-like filter (see e.g., FIG. 64). Any such shape may optionally include pleats to increase the surface area of the pre-motor filter 148 (see e.g., rectangular pleated filters in FIGS. 142 to 145). Optionally, the pre-motor filter 148 may be provided with an internal air inlet into which the airflow enters and passes through the pre-motor filter 148 radially outwardly. In such embodiments, the internal air inlet may be sealed to the air outlet of any cleaning stage, such as the only cleaning stage 126 (see e.g., FIGS. 52 to 53) or the second cleaning stage 1262. Alternately, the pre-motor filter 148 may optionally be provided with an internal air outlet out of which the airflow exits after passing through the pre-motor filter 148 radially inwardly (see e.g., FIGS. 79 to 81, 122, 123, 125, and 126). In such embodiments, the internal air outlet may optionally be sealed to the air inlet of the suction motor 140 (see e.g., FIGS. 72 to 73).

[0483] The pre-motor filter 148 may be removed from the hand vacuum 100 such as for cleaning, inspection, replacement, and the like. The pre-motor filter 148 may be removed by any suitable means such as, for example, through a sidewall of the hand vacuum 100. For example, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the pre-motor filter 148 (and optionally the pre-motor filter housing 152) may be withdrawn from the hand vacuum 100 through the main body housing 120 at the upper end 112 of the hand vacuum 100 (i.e., in the upward direction; see e.g., FIGS. 74, 88, 118, and 137), at the lower end 114 (i.e., in the downward direction), at the rear end 110 (i.e., in the rearward direction; see e.g., FIGS. 72 to 73, and 81 to 82), at the front end 108 (i.e., in the forward direction; see e.g., FIGS. 55 and 60), or at a lateral side (i.e., in the lateral direction; see e.g., FIGS. 28, 67 to 69, 105 to 106, and 135 to 136). Alternatively, the pre-motor filter 148 may be exposed within the hand vacuum 100 for removal, such as by moving (e.g., pivoting, translating) all of the air treatment assembly 124 (see e.g., FIGS. 2, 79 to 80, and 142) or a portion of the air treatment assembly 124 (see e.g., FIG. 52) relative to the main body 118, or removing the air treatment assembly 124 from the main body 118 (see e.g., FIGS. 91 to 92, 111 to 113, 114 to 117, and 132 to 134).General Description of a Post-Motor Filter

[0484] Optionally, one or more post-motor filters 150 may, alternatively or in addition to the pre-motor filter 148, be provided in the hand vacuum 100. The post-motor filter 150 may be at any position in the airflow path 138 downstream from the suction motor 140. For example, post-motor filter 150 may be positioned in the post-motor filter housing 154 in the main body 118 forward of the suction motor 140, (see e.g., FIGS. 47 and 60), rearward of the suction motor 140 (see e.g., FIGS. 45, 125), above the suction motor 140 (see e.g., FIG. 130), annularly around part or all of the axial length of the suction motor (see e.g., FIGS. 33 to 35, 52 to 53, 55, 67 to 69, 72 to 73, 75 to 76, 89 to 90, and 138) or partially annularly (see e.g., FIGS. 60 and 64) around part or all of the axial length of the suction motor 140 as described with respect to the pre-motor filter 148, and / or in the handle 122.

[0485] The post-motor filter 150 may be a physical foam media filter or may be any other suitable physical porous filter media, including, for example, a felt filter, a HEPA filter, a paper filter, other physical filter media, an electrostatic filter, and the like.

[0486] The post-motor filter 150 may have any suitable shape, such as cylindrical, or a generally flat, slab-like filter. Optionally, the post-motor filter 150 may be provided with an internal air inlet into which the airflow enters and passes through the post-motor filter 150 radially outwardly. The internal air inlet may be sealed to the air outlet of the suction motor 140 (see e.g., FIG. 47). Alternately, the post-motor filter 150 may optionally be provided with an internal air outlet out of which the airflow exits after passing through the post-motor filter 150 radially inwardly (see e.g., FIG. 45). The internal air outlet may be sealed to the clean air outlet 136.

[0487] The post-motor filter 150 may be removed from the hand vacuum 100 such as for cleaning, inspection, replacement, and the like. The post-motor filter 150 may be removed by any suitable means as described with respect to the pre-motor filter 148.General Description of a Clean Air Outlet

[0488] The clean air outlet 136 may be provided as part of the main body 118. As exemplified in the embodiment illustrated in FIG. 1, the clean air outlet 136 may include a grill 230 through which clean air may exit the hand vacuum 100 (see also e.g., FIGS. 32, 52, 54, 59, 63, 68, 74, 88, 91, 118, 137, and 140). The grill 230 may be oriented such that exiting air travels generally upwardly, generally laterally outwardly, and / or at an inclined angle generally rearwardly from the hand vacuum 100. Such directional air flow may beneficially avoid the exhaust airflow impacting the user or the surface to be cleaned.

[0489] The clean air outlet 136 may be at any position rearward of the dirty air inlet 134. For example, the clean air outlet 136 may be provided proximate the rear end 110 (see e.g., FIGS. 1, 32, 52, 54, 63, 68, 74, 88, 91, and 137), proximate the front end 108 (see e.g., FIG. 59), or any other location therebetween. Additionally, the clean air outlet 136 may be at any position between the upper and lower ends 112, 114 of the hand vacuum 100. For example, the clean air outlet 136 may be provided through the main body housing 120 at the lower end 114 (see e.g., FIGS. 1, 52, and 68), through the main body housing 120 at the upper end 112 (see e.g., FIGS. 32, 54, 59, 63, 74, 125, and 130). Any other location between the upper and lower ends 112, 114 may be possible, such as through the main body housing 120 at the rear end 110 or at a lateral side (see e.g., FIGS. 88 and 91). Alternatively, where the airflow path 138 passes through the handle 122, the clean air outlet 136 may be provided in a portion of the handle 122, such as a hand grip portion 232, 234, a lower member 240, or a finger guard 241 thereof (see e.g., FIGS. 118 and 140).General Description of a Handle

[0490] The hand vacuum 100 may include any suitable type of carry handle 122, which may be part of the main body 118. The handle 122 may be located proximate the rear end 110 of the hand vacuum 100. Additionally, or alternatively, the handle 122 may be located proximate the upper end 112 of the hand vacuum 100.

[0491] The handle 122 may have one or more hand grip portions. For example, the handle 122 may be a multi-grip handle (see e.g., FIGS. 1, 28, 38, 39, 44, 46, 47, 105, 111, and 135). As shown in the illustrated embodiments, the multi-grip handle 122 may have an upper grip portion 232 and a pistol grip portion 234. Optionally, the multi-grip handle 122 may also have a lower grip portion (not shown) opposite the upper grip portion 232. The user may grip any of the hand grip portions to carry and manipulate the hand vacuum 100. In this way, the multiple hand grip portions may enable the user to hold the hand grip portion 232, 234 most comfortable according to the user's preference and / or suitable for the mode of operation. This may vary depending on the angle at which the user wishes to hold the hand vacuum 100 during operation and / or the direction the dirty air inlet faces during operation.

[0492] As shown, a forward end of the upper grip portion 232 may be connected to the main body housing 120 proximate the upper end 112 of the hand vacuum 100 directly or by an upper bridge portion. The upper grip portion 232 may extend generally rearwardly from the main body housing 120 along an upper grip axis 236. That is, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the upper grip axis 236 may form an acute upward or downward angle from horizontal. The angle can be any suitable angle, such as between about 5° and 75° (e.g., between 5° and 60°, or between 5° and) 45°. For example, in the illustrated embodiments, the upper grip axis 236 of the upper grip portion 232 is forming a downward angle of about 10° from horizontal. Any angle of the upper grip axis 236 may be possible.

[0493] An upper end of the pistol grip portion 234 may be connected to a rearward end of the upper grip portion 232. The pistol grip portion 234 may extend generally downwardly from the upper end of the pistol grip portion 234 along a pistol grip axis 238. That is, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the pistol grip axis 238 may form an acute forward or rearward angle from vertical. The angle can be any suitable angle, such as between about 5° and 75° (e.g., between 5° and 60°, or between 5° and) 45°. For example, in the embodiments illustrated, the pistol grip axis 238 of the pistol grip portion 234 is forming a forward angle of about 15° from vertical. Any angle of the pistol grip axis 238 may be possible.

[0494] A lower end of the pistol grip portion 234 may optionally be connected to a lower rearward portion of the main body housing 120 proximate the lower end 114 of the hand vacuum 100 (see e.g., FIGS. 2, 38, 39, 46, 47, 106, 113, and 135). Optionally, the lower end of the pistol grip portion 234 may be connected to the main body housing 120 by a lower bridge (see e.g., FIGS. 28, 48). Optionally, the lower end of the pistol grip portion 234 may be unconnected to any portion of the hand vacuum 100 (see e.g., FIG. 44).

[0495] Alternatively, the lower end of the pistol grip portion 234 may be connected to a rearward end of the lower grip portion, if present. A forward end of the lower hand grip portion may be connected to the main body housing 120 proximate the lower end 114 of the hand vacuum 100 directly or by a lower bridge portion. The lower grip portion may extend generally rearwardly from the main body housing 120 along a lower grip axis configured similarly to as described with respect to the upper grip portion 232. The lower hand grip portion may enable, for example, inverted operation of the hand vacuum 100 (i.e., with the lower end 114 disposed above the upper end 112).

[0496] Optionally, the handle 122 may include only one of the hand grip portions. For example, the handle 122 of the hand vacuum 100 may have only the upper grip portion 232 (see e.g., FIGS. 45 and 50). As shown, in such embodiments, the upper grip portion 232 may be configured as described previously, with the rearward end of the upper grip portion 232 unconnected to any portion of the hand vacuum 100 (i.e., akin to a wand-style handle).

[0497] Alternatively, the handle 122 of the hand vacuum 100 may be a pistol grip handle having only the pistol grip portion 234 (see e.g., FIGS. 32, 40, 41, 42, 55, 59, 63, 70, 74, 78, 88, 91, 117, 118, 132, 137, and 142). In such embodiments, the upper end of the pistol grip portion 234 may be connected to an upper rearward portion of the main body housing 120 (see e.g., FIGS. 32, 40, 41, 43, 55, and 63) or an upper bridge (see e.g., FIGS. 42, 59, 117, 132, and 142) proximate the upper end 112 of the hand vacuum 100 or, alternatively, directly to the main body housing 120 (see e.g., FIGS. 70, 74, 78, 88, 91, 118, and 137). Similar to as described with respect to the multi-grip handle, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the pistol grip axis 238 may form an acute forward or rearward angle from vertical. For example, in the embodiments illustrated, the pistol grip axis 238 of the pistol grip portion 234 is forming a rearward angle of about 15° from vertical. Any angle of the pistol grip axis 238 may be possible.

[0498] If the handle 122 is a pistol grip handle, the lower end of the pistol grip portion 234 may be configured as described previously. That is, the lower end may optionally be connected to the lower rearward portion of the main body housing 120 (see e.g., FIGS. 40, 41, 42, 43, 55, and 59) or the lower bridge (see e.g., FIGS. 32, 117, and 132) proximate the lower end 114 of the hand vacuum 100 or, alternatively, unconnected to any portion of the hand vacuum 100. In some embodiments where the lower end of the pistol grip portion 234 is unconnected to any portion of the main body housing 120, the handle 122 may optionally include a lower member 240 connected to the lower end of the pistol grip portion 234 (see e.g., FIGS. 63, 70, 74, 78, 88, 91, 118, 137, and 140). The lower member 240 may function as a stand for the hand vacuum 100. Additionally, or alternatively, the lower member 240 may function as the energy storage member housing 146 for one or more energy storage members 144 (see e.g., FIGS. 64, 119 to 126, 138, and 142).

[0499] Optionally, if the handle 122 is a pistol grip handle including the lower member 240, the handle 122 may further include a finger guard 241. The finger guard 241 may be located forward of the pistol grip portion 234 of the handle 122 and extend from the lower member 240 to, e.g., the air treatment assembly 124 or main body 118 at the lower end 114 of the hand vacuum 100. In such embodiments, the finger guard 241 may advantageously protect the user's fingers while gripping the pistol grip portion 234. The finger guard 241 may further advantageously provide additional space within the hand vacuum 100 in which to house various components such as the suction motor 140 (see e.g., FIGS. 119, 120, 121, 123, 125, 126, and 142) or energy storage member 144 (see e.g., FIG. 130), for example. Further, in some embodiments, the finger guard 241 may function as a conduit forming a portion of the airflow path 138 (see e.g., FIGS. 119, 121, 123, 125, 126, and 142).

[0500] In some embodiments, the upper rearward portion of the main body housing 120 may optionally be one or more of the motor housing 142 (see e.g., FIGS. 33A to 33B, 40, 43, 55, and 64), the energy storage member housing 146 (see e.g., FIG. 41), the pre-motor filter housing 152, and the post-motor filter housing 154 (see e.g., FIGS. 33A to 33B, and 64). Accordingly, one or more components of the hand vacuum 100 may be at the upper end of the handle 122. Where the handle 122 is a pistol grip handle, the one or more components may be at the upper end of the pistol grip portion 234 such that the pistol grip axis 238 intersects at least one component in the upper rearward portion (see e.g., FIGS. 33A to 33B, 40, 41, 43, 55, and 64).

[0501] Similarly, in some embodiments, the lower rearward portion of the main body housing 120 may optionally be one or more of the motor housing 142 (see e.g., FIGS. 2, 39, 41, 42, 45, 106, 113, and 136), the energy storage member housing 146 (see e.g., FIGS. 38, 39, 40, 46, 47, 55, and 60), the pre-motor filter housing 152, and the post-motor filter housing 154 (see e.g., FIGS. 42 and 45). Accordingly, one or more components of the hand vacuum 100 may be at the lower end of the handle 122. Where the handle 122 is a pistol grip handle, the one or more components may be at the lower end of the pistol grip portion 234 such that the pistol grip axis 238 intersects at least one component in the lower rearward portion (see e.g., FIGS. 40, 41, 42, 55, and 60).

[0502] In some embodiments, a finger gap 242 for receiving the fingers of a user may be formed between the upper grip portion 232 and / or the pistol grip portion 234 of the handle 122 and the main body housing 120 (see e.g., FIGS. 1, 28, 32, 38 to 47, 54, 59, 63, 106, 111, 117, 119, 121, 123, 125, 126, 130, 132, 136, and 140). That is, as shown in these embodiments, depending on the configuration of the main body housing 120 and the handle 122, the finger gap 242 may be bounded, at least in part, by three or more of the upper grip portion 232, the pistol grip portion 234, the upper bridge, the lower bridge, and the main body housing 120 at the rear end 110 of the hand vacuum 100, the upper rearward portion, the lower rearward portion, and the lower member 240 and finger guard 241. Optionally, the finger gap 242 may be unbounded at one of a lower end (see e.g., FIG. 44) and a rearward end (see e.g., FIG. 45) thereof.

[0503] It will be appreciated that any one or more of the hand grip portions may be arcuate as exemplified or may extend linearly, e.g., a grip axis may extend centrally through the grip portion (e.g., pistol grip portion 234) from a first end of the grip portion (e.g., a lower end of pistol grip portion 234) to an opposed end of the grip portion (e.g., an upper end of pistol grip portion 234).General Description of a Power Supply

[0504] Optionally, the hand vacuum 100 may be powered by an electrical cord. In such embodiments, the suction motor 140 may run on AC power supplied from a wall socket. Alternatively, or in addition to being powered by an electrical cord, the hand vacuum 100 may include one or more onboard power sources. If both an electrical cord and one or more onboard power sources are present, the power cord may optionally be detachable from the hand vacuum 100.

[0505] The onboard power sources may be one or more energy storage members 144 of any suitable type, including, for example one or more batteries, such as solid-state batteries, and / or one or more capacitors, such as super capacitors or ultra capacitors. Optionally, if the one or more energy storage members 144 are batteries, the batteries may be rechargeable (e.g., via an electrical cord that electrically connects the hand vacuum 100 to household mains, or when docked to a docking station). Alternatively, the batteries may be replaceable, non-rechargeable batteries. Additionally, or alternatively, the one or more onboard power sources (i.e., batteries or capacitors) may be provided in a removable housing, such as a removable battery pack, for recharging and / or replacement.

[0506] If the energy storage member(s) 144 is / are a battery pack, each battery pack may include any suitable number of cells, and may include, for example, 3 cell 18560 lithium ion batteries. If two battery packs are connected in series, they may create a 6 cell 22V Li-ion power source. Any number of cells may be used to create a power source having a desired voltage and current, and any type of battery may be used, including NiMH, alkaline and the like.

[0507] Each energy storage member 144 may be positioned in an energy storage member housing 146, which may be rearward of and / or below the air treatment assembly 124. Each energy storage member housing 146 may be positioned in, or integrally formed with, the main body housing 120.

[0508] The energy storage member 144 used in the hand vacuum 100 may be provided at a single location. For example, the energy storage member 144 may be provided as one large battery pack (see e.g., FIGS. 2, 14, 28, 29A, 33A to 33B, 36, 38, 39, 40, 41, 42, 43, 45, 47, 48, 52 to 53, 55, 60, 64, 72 to 73, 75, 79, 81, 89 to 90, 93 to 94, 106 to 107, 113, 119, 121, 125, 130, 136, 138, and 142). Alternatively, multiple energy storage members 144 may be provided in multiple locations within the hand vacuum 100. For example, the energy storage members 144 may be provided as multiple smaller battery packs at different locations, which may be removable individually or concurrently (see e.g., FIGS. 44, 46, 47, 67 to 69, 117, and 132).

[0509] The energy storage member 144 may be provided at any position within the main body housing 120, such as proximate the upper end 112 of the hand vacuum 100 (see e.g., FIGS. 36, 45, 67 to 69, 106 to 107, 117, and 136), proximate the lower end 114 of the hand vacuum 100 (see e.g., FIGS. 33A to 33B, 42, 67 to 69, and 117), or at any other location therebetween. Alternatively, the energy storage member 144 may be provided at any position within the handle 122, such as within the upper grip portion 232 (see e.g., FIGS. 28, 29A, 44, 47, and 52 to 53), the pistol grip portion 238 (see e.g., FIGS. 43, 44, and 48), the lower grip portion, the lower member 240 (see e.g., FIGS. 64, 72 to 73, 75, 79, 81, 89 to 90, 93 to 94, 119, 121, 125, 126, 138, and 142), or the finger guard (see e.g., FIG. 130).

[0510] Optionally, at least part of the energy storage member housing 146 may extend rearwardly from the main body housing 120. Accordingly, in embodiments where the energy storage member housing 146 is positioned proximate the upper end 112, at least part of the energy storage member housing 146 may form the upper rearward portion of the main body 118 (see e.g., FIG. 41). Similarly, in embodiments where the energy storage member housing 146 is positioned proximate the lower end 114, at least part of the energy storage member housing 146 may form the lower rearward portion of the main body 118 (see e.g., FIGS. 2, 14, 38, 39, 40, 47, 55, 60, and 113). Alternatively, at least part of the energy storage member housing 146 may extend rearwardly from the main body housing 120 into the upper grip portion 232 or the lower grip portion such that the energy storage member 144 is partially nested in both the main body housing 120 and the handle 122 (see e.g., FIG. 46).

[0511] As shown in various ones of these embodiments, any number of energy storage members 144 may be provided in any one location or combination of two or more of locations described previously within the main body housing 120 and the handle 122. Any additional location(s) within the hand vacuum 100 other than those described may be possible.

[0512] Positioning energy storage members 144 at two or more locations may help distribute the weight of the batteries and may affect the hand feel and / or perceived balance of the hand vacuum 100. Optionally, if the energy storage members 144 are provided in multiple locations within the hand vacuum 100, the energy storage members 144 may be positioned generally opposite each other on opposite sides of a central plane extending along the hand vacuum axis 116 of the hand vacuum 100. For example, one energy storage member 144 may be positioned toward the upper end 112 of the hand vacuum 100 and another energy storage member 144 may be positioned toward the lower end 114 (see e.g., FIGS. 44, 46, 47, 67 to 69, 117, and 132). Similarly, the energy storage members 144 may be positioned toward opposed lateral sides of the hand vacuum 100 (see e.g., FIGS. 86A to 86B), such as on opposed lateral sides around the suction motor 140 (see e.g., FIGS. 2, 14, 39, and 113). In this way, the weight of one energy storage member 144 may at least partially offset / counterbalance the weight of the opposing energy storage member 144. This may help reduce the torque experienced by the user while manipulating the orientation of the hand vacuum 100 during use.

[0513] The energy storage member(s) 144 may have any orientation within the main body housing 120 and / or the handle 122. For example, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, a long dimension of the energy storage member(s) 144 may extend horizontally (i.e., forwardly / rearwardly or laterally), vertically, or any combination thereof. For example, in the embodiment illustrated in FIGS. 140 to 145, some of the energy storage members 144 are oriented laterally horizontally (the forward four batteries exemplified in FIG. 144) and some of the energy storage members 144 are oriented forwardly / rearwardly horizontally (the rearward battery as exemplified in FIG. 144).

[0514] Additionally, or as an alternative to the energy storage members 144 being onboard power sources, one or more energy storage members 144 may optionally be provided within the wand 104, the surface cleaning head 106, and other accessories. The energy storage member(s) 144 in the wand 104 and / or the surface cleaning head 106 may provide some additional power when the hand vacuum 100 is connected to the wand 104 and / or to the surface cleaning head 106 via the wand 104. For example, the additional power from the energy storage member(s) 144 in the wand 104 and / or the surface cleaning head 106 may be used to help power one or more electrically powered components in the surface cleaning head and / or wand, such as one or more of a motor and fan assembly (e.g., a dirty air motor), a brush motor, lights, or other such features that require power in the surface cleaning head 106. Optionally, all of the energy storage members 144 can provide at least some power to the suction motor 140 and, optionally, one or more electrically powered components in the surface cleaning head and / or wand. This may help provide longer run times, higher suction levels or both as compared to only using the power supplied from the hand vacuum 100. The additional mass of the energy storage member(s) 144 in the wand 104 and / or the surface cleaning head 106 may also advantageously be left behind when a user detaches the hand vacuum 100 for above floor cleaning. Accordingly, a desired level of power may be provided when operating in an above-floor cleaning mode and a floor cleaning mode.General Description of an Electrical Connector

[0515] As described previously, in addition to functioning as a nozzle, the air inlet conduit 156 can be directly connected to the downstream end of the wand 104 or any suitable accessory tool such as a crevice tool, a mini brush or the like. The air inlet conduit 156 may also be or indirectly connected to any such accessory tool via the wand 104. Optionally, the hand vacuum 100 can include an electrical connector 244 provided proximate the front end 108, such as adjacent the air inlet conduit 156 (see e.g., FIGS. 1, 50, 54, 59, 63, 70, 78, 111, 114, 118, and 140), which may place the hand vacuum 100 in electrical communication with the accessory tool or the wand 104 upon mechanically connecting the accessory tool or the wand to the hand vacuum 100.

[0516] In such embodiments, the downstream end of the accessory tool or the wand 104 can include another electrical connector detachably matingly connectable to the electrical connector 244 of the hand vacuum 100. The electrical connectors 244 may be of any suitable configuration, such as mating pins and sockets. Power can thereby be communicated directly between the hand vacuum 100 and the accessory tool or indirectly between the hand vacuum 100 and the accessory tool or the surface cleaning head 106 via the wand 104.

[0517] Power may be supplied from the energy storage members 144 and / or electrical cord of the hand vacuum 100 to the electrical connector 244 via wiring 246. The path of the wiring 246 may depend, for example, on the relative positioning of the power supply and the electrical connector 244. For example, the path of the wiring 246 (which is generally shown in stippled lines) from the power supply to the electrical connector 244 may pass through (i.e., internal to) any portion of the main body 118 such as the handle 122 and / or the main body housing 120. The wiring 246 may further pass through one or more portions of the air treatment assembly 124 such as the air treatment chamber 128 and / or the dirt collection chamber 132 of any cleaning stage(s) 126. The wiring 246 may then pass from within the air treatment assembly 124 through an external post 248 extending along an exterior of the air inlet conduit 156 to the electrical connector 244 (see e.g., FIGS. 2, 28, 55, 60, and 64). Alternatively, the path of the wiring 246 may bypass the interior volume of the air treatment assembly 124. For example, the wiring 246 may pass from within the main body housing 120 and through an external post 248 extending along an exterior of the air treatment assembly 124 and the air inlet conduit 156 to the electrical connector 244 (see e.g., FIGS. 52, 67 to 69, 73, 79, 81, 113, 117, and 118).

[0518] Similarly, power may be supplied from the energy storage members 144 and / or electrical cord of the hand vacuum 100 to other electrical components such as the suction motor 140, a user interface, lights, and the like, via wiring 246.General Description of Various Modes of Operation

[0519] Referring to FIG. 5, the hand vacuum 100 may be configured so that the air inlet conduit 156 may be directly mechanically, and optionally electrically (as described previously), connected to the upper end of the wand 104. Referring to FIG. 6, the lower end of the wand 104 may be mechanically, and optionally electrically (i.e., via electrical connectors similar to as described previously), connected to the surface cleaning head 106. The lower end of the wand 104 may also be pivotally, and optionally steeringly, connected to the surface cleaning head 106. In this arrangement, the handle 122 can be used to manipulate the hand vacuum 100 when detached from the wand 104, and can be used to manipulate the combination of the hand vacuum 100 and the wand 104, or the combination of the hand vacuum 100, wand 104, and surface cleaning head 106 (i.e., the stickvac), depending on the mode in which the hand vacuum 100 is used. The wand 104 may be any suitable member that can provide the desired structural connection and airflow communication between the hand vacuum 100 and the surface cleaning head 106 (e.g., a rigid airflow conduit).

[0520] Optionally, the hand vacuum 100 can be detachably connected to the upper end of the wand 104, for example using a latch. Similarly, the lower end of the wand 104 can optionally be removably connected to the surface cleaning head 106. Providing detachable connections at both ends of the wand 104 may enable use of the hand vacuum 100 in at least three modes of operation. That is, the hand vacuum 100 can be used (i) independently in a first above-floor cleaning mode using the air inlet conduit 156 to clean a surface (i.e., in the configuration shown in e.g., FIG. 1); (ii) connected to the wand 104 in a second above-floor cleaning mode using the lower end of the wand 104 to clean a surface (i.e., in the configuration shown in FIG. 5); and (iii) connected to both the wand 104 and the surface cleaning head 106 in an upright cleaning mode using the surface cleaning head 106 to clean a surface (i.e., in the configuration shown in FIG. 6).

[0521] In the first and second above-floor cleaning modes, the hand vacuum 100 can be used for cleaning (e.g., furniture, countertops, etc.) and cleaning hard to reach areas (e.g., along baseboards, ceilings, stairs, etc.). Optionally, accessory tools such as crevice tools, mini brushes (e.g., manual or motorized), hoses, and the like can be removably connected to the air inlet conduit 156 or wand 104 to facilitate the above-floor cleaning modes. In the upright cleaning mode, the hand vacuum 100 can be used to clean a floor or other surface in a manner analogous to a conventional upright-style vacuum cleaner.General Description of a User Interface

[0522] The hand vacuum 100 may include one or more user interfaces. Each user interface may be a display screen, a control switch, a power switch, and the like. For example, each user interface may provide information display, function control, or both. If more than one user interface is provided, the user interfaces may be of the same or different types. For example, a first user interface may be a display screen and a second user interface may be a control switch or a power switch.

[0523] Additionally, If more than one user interface is provided, the user interfaces may be interrelated or separate. For example, information displayed on a first user interface (i.e., a display screen) may be controlled by a related second user interface (i.e., a control switch) and / or correspond to the function of the hand vacuum 100 controlled by the related second user interface (i.e., a control switch or a power switch). As another example, the first user interface may provide information display and / or function control for one or more functions of the hand vacuum 100 and the second user interface may provide information display and / or function control for one or more different functions of the hand vacuum 100.

[0524] Optionally, the user interface of the hand vacuum 100 may include one or more information display devices to provide information to a user. For example, the hand vacuum 100 may include one or more lights to indicate when the suction motor is on, its current power level (e.g., hi or low, if applicable), battery charge level, and the like. The display screen 250, and associated electronics, may be used to display status information. Optionally, the information display device may be connectable to other apparatuses. For example, if the hand vacuum 100 is connected to a different apparatus, such as an accessory tool, the wand 104, and / or surface cleaning head 106, the information displayed may be customized for each type of apparatus connected to the hand vacuum 100. That is, the information display device may optionally be communicatively connected to whatever apparatus is connected to the hand vacuum 100 (e.g., via the electrical connector 244) such that it may detect the type of apparatus connected. The information display devices may include one or more display screens 250, such as an LCD display, LED screen, OLED screen, and the like. Accordingly, the display screen 250 may be configured to show information about whatever apparatus is connected to the hand vacuum 100 (e.g., brush motor of a surface cleaning head on or off), so that the same screen can be used for multiple apparatuses. This may reduce the need to provide screens or the like on each separate apparatus that can be connected to the hand vacuum 100.

[0525] The display screen 250 may be provided on the hand vacuum 100 at any location suitable for allowing the user to monitor the status information displayed on the screen 250. For example, the display screen 250 may be provided at the rear end 110 of the hand vacuum 100, such as on the main body housing 120 at the upper end 112 (see e.g., FIGS. 42, 44 to 47, 50, 59, 114, and 132) or the rear end 110 (see e.g., FIGS. 33A, 40, 41, 43, 55, 64, 72, 75, 79, 81, 89, 93, 118, and 138) of the hand vacuum 100, on the upper end of the handle 122 (see e.g., FIGS. 1, 38, 39, 105, 111, 135, and 140), or any other suitable location.

[0526] Optionally, the user interface of the hand vacuum 100 may include one or more control / power switches 252 (referred to generally herein as power switches). The power switches 252 may control any function of the hand vacuum 100, such as operation of the suction motor 140 (e.g., on / off, variable power levels, or both). For example, a power switch 252 may be operable to establish a power connection between the energy storage members 144 and the suction motor 140. Similarly, the same power switch 252 or a different one may optionally be operable to establish a power connection between the energy storage members 144 and lights or a brush motor of the hand vacuum 100.

[0527] Optionally, a power switch 252 may also be configured to control other powered devices connectable to the hand vacuum 100. For example, the power switch 252 may be operable to control both the suction motor 140 of the hand vacuum 100 and the brush motor and / or lights of the surface cleaning head 106 and / or any other electrified elements provided on the wand 104, surface cleaning head 106, or any other tool or attachment. Alternatively, the power switch 252 may be operable to control some functions of the hand vacuum 100 only, and one or more additional power switches 252 may be operable to control the different functions of the powered devices connectable to the hand vacuum 100.

[0528] The one or more power switches 252 can be provided on the hand vacuum 100 at any suitable location(s), which may be the same or different locations. The power switch 252 may be provided on or near the handle 122 such that it can be actuated by a finger (e.g., thumb or index finger) of the user on the same hand as is holding the handle 122. For example, the power switch 252 may be provided on the upper grip portion 232 (see e.g., FIGS. 1, 50, 106, 111, and 135) or pistol grip portion 234 (see e.g., FIGS. 63, 70, 74, 78, and 140) of the handle 122. This may allow true one-handed operation of the hand vacuum 100.

[0529] Optionally, or in addition to being provided on the handle 122, the power switch 252 may be provided on the main body 118 at a location generally proximate to the handle 122 so that the switch 252 can be operated using the same hand that is holding the handle 122 or, alternatively, by the other hand of the user. For example, the power switch 252 may be provided on the main body housing 120 at the upper end 112 of the hand vacuum 100 (see e.g., FIGS. 28, 59, and 140) or at the rear end 110 of the hand vacuum 100 (see e.g., FIGS. 33, 55, 89, 93, 114, and 138) proximate to the handle 122.

[0530] Optionally, if more than one user interface is provided (i.e., two or more display screens 250, two or more power switches 252, or one or more display screens 250 and one or more power switches 252), the user interfaces may be provided at any combination of locations described herein. For example, in the embodiment illustrated in FIG. 140, the hand vacuum 100 includes a first user interface provided at the upper end 112 of the hand vacuum 100 on the upper bridge portion above the handle 122 and a second user interface is provided at the upper end of the handle 122 on the pistol grip portion 234.

[0531] The power switch 252 can be provided in any suitable configuration. For example, the power switch 252 may be a button (see e.g., FIGS. 1, 111, 114, and 140), a rotary switch, a sliding switch (see e.g., FIGS. 50, 106, and 136), a trigger-type actuator (see e.g., FIGS. 63, 70, 74, 78, and 118), and the like. Optionally, the display screen 250 may be a touch screen, and the power switch 252 can be provided as a touch button in the display screen 250 (see e.g., FIGS. 28, 33, 55, 59, 89, 93, 138, and 140).

[0532] Optionally, the hand vacuum cleaner 100 may be configurable in two or more different operating modes having different power profiles. For example, the suction motor 140 in the hand vacuum 100 may be operable at a low power mode and a high-power mode, each providing different levels of suction and air flow through the hand vacuum 100. In some embodiments, switching between such power modes may be done manually by a user using the power switch 252. In other embodiments, switching between such power modes may be done automatically based on the configuration or operation of the hand vacuum. In other embodiments, the hand vacuum 100 may automatically change power modes, but may also include a manual option for a user to override the automatic changes.General Description of a Docking Station

[0533] Referring to FIG. 83, as exemplified, the hand vacuum 100 may be docked at a docking station 254 for emptying and / or recharging the energy storage members 144 (if any). As exemplified, the docking station 254 may include a station base 256 and a station conduit 258 extending upwardly from the station base 256. The hand vacuum 100 may be docked to the docking station 254 at an upper end of the station conduit 258. The hand vacuum 100 may be docked to the docking station 254 alone. Alternatively, the station conduit 258 may optionally extend to an elevation sufficient such that the hand vacuum 100 may dock at the docking station 254 while attached to the wand 104 or, as shown, the wand 104 and surface cleaning head 106.

[0534] When docked to the docking station 254, the hand vacuum axis 116 of the hand vacuum 100 may have any orientation. For example, the hand vacuum axis 116 may be generally vertically oriented (as shown), generally horizontally oriented, or at any other orientation. This may depend, for example, on the location of the docking station door(s) of the hand vacuum 100. For example, if the front door 202 is an automatic emptying door (see e.g., FIGS. 84, 89 to 90, and 138 to 139) and / or the front wall 196 of the dirt collection chamber 132 includes a separate automatic emptying door 206 (see e.g., FIGS. 20A to 20B, 20C to 20D, and 86), the hand vacuum axis 116 may be generally vertically oriented when docked to the docking station 254 (as shown) or, alternatively, generally horizontally oriented. Similarly, if the bottom door 204 is an automatic emptying door (see e.g., FIG. 141) and / or the bottom wall 198 of the dirt collection chamber 132 includes a separate automatic emptying door 206, the hand vacuum axis 116 may be generally vertically oriented when docked to the docking station 254 (as shown) or, alternatively, generally horizontally oriented.

[0535] Once docked or upon docking, the openable portion (i.e., the front door 202, bottom door 204, and / or automatic emptying door 206) may automatically move from the closed position (see e.g., FIGS. 20A, 20C, and 86A) to the open position (see e.g., FIGS. 20B, 20D, 84, 86B, and 141), placing the dirt collection chamber 132 and / or, optionally (as shown), the dirt collection region 130 within the air treatment chamber 128, in fluid communication with the station conduit 258. Subsequently, a station suction motor 259 in the station base 256 may generate suction to draw the contents of the dirt collection chamber 132 and / or the dirt collection region 130 through the opening of the openable portion and into the station conduit 258 and ultimately out a station air outlet. Alternatively, as described in greater detail subsequently, the suction motor 140 of the hand vacuum 100 may be used to generate the suction to draw the contents of the dirt collection chamber 132 and / or the dirt collection region 130 through the opening of the openable portion and into the station conduit 258. The withdrawn particulate matter may then collect in a station collection chamber within the station base 256 or, optionally, within the station conduit 258 (see e.g., FIG. 84). This may enable the hand vacuum 100 to be automatically emptied by the docking station 254.Detailed Discussion of Particular Features

[0536] The foregoing general description is intended to provide a basis for understanding several of the aspects that are discussed herein. It will be appreciated that any embodiment, such as the example embodiments described herein, may use any one or more of the aspects as described in the general description. Similarly, any embodiment may use any one or more of those features as described in greater detail in the following detailed discussion of particular configurations.Transverse Cyclone Having Multiple Chamber Air Inlets

[0537] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general description and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets.

[0538] As described previously, an advantage of increasing the number of chamber air inlets is that each chamber air inlet may be smaller in axial width while introducing dirty air into the air treatment chamber at about the same cumulative air flow rate. This may similarly enable the air treatment chamber to be smaller in axial length while achieving the desired number of revolutions of the airflow path within the air treatment chamber. Accordingly, an air treatment chamber having a plurality of chamber air inlets from one or more headers may meet or exceed the minimum desirable separation efficiency of particulate matter from the dirty airflow while providing a more compact hand vacuum.

[0539] Another advantage of increasing the number of chamber air inlets is that multiple airflow paths in the air treatment chamber may be provided, which may reduce resistance and turbulence (back pressure) in the airflow.

[0540] The air flow path delivering air to the plurality of chamber air inlets 176 may be of various designs. For example, and as discussed in more detail subsequently, some or all of the plurality of chamber air inlets 176 may be downstream from one or more partially annular or a fully annular headers (see for example FIGS. 8 to 10). Alternately, or in addition, as discussed in more detail subsequently, a plurality of conduits may define discrete channels that feed one or more of the plurality of air inlets. Accordingly, two or more conduits, each of which defines a channel that is isolated from the other channel(s), may be provided (see for example FIGS. 11 to 12). Alternately or in addition, one channel may branch off of another channel and a porous member may be provided at the interface of the two channels (see for example the bypass channel of FIGS. 13A and 13B).

[0541] Referring to FIGS. 8 to 10, in the illustrated examples, the air outlet conduit 156 defines a single channel 160, which in this embodiment includes the linear portion extending from the dirty air inlet 134 and a header 161 downstream of the linear portion. The header 161 has a plurality of dirty air outlets 162, each of which corresponds to a respective chamber air inlet 176. As exemplified, each dirty air outlet 162 and its corresponding chamber air inlet 176 forms a port in the treatment chamber sidewall 172. That is, each paired dirty air outlet 162 of the header and chamber air inlet 176 of the air treatment chamber 128 collectively define an outlet / inlet port through the conduit sidewall 158 / treatment chamber sidewall 172 (i.e., a common wall defining a portion of each of the treatment chamber sidewall 172 and the conduit sidewall 158). Accordingly, when the hand vacuum 100 in the illustrated embodiment is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, a vertical plane that is transverse to the central axis 170 (i.e., the cross-sectional view shown) may extend through a dirty air outlet 162 of the air inlet conduit 156, a corresponding chamber air inlet 176 of the air treatment chamber 128, the linear portion and header 161, and the air treatment chamber 128.

[0542] It will be appreciated that guide vanes or the like may be provided and the chamber air inlets 176 may be configured to produce a swirling or cyclone flow in the air treatment chamber 128. In such a case, each air chamber inlet 176 may be, e.g., a tangential inlet that is downstream from a dirty air outlet 162. For example, the dirty air outlet 162 may be an inlet to a tangential air inlet to a cyclone.

[0543] As shown, the conduit sidewall 158 around the channel 160 extends around at least a portion of the treatment chamber sidewall 172 of the air treatment chamber 128. In this way, as exemplified, the conduit sidewall 158 forms the radial outer wall of header 161, which may be partially annular or fully annular around at least part of the treatment chamber sidewall 172. The header 161 may extend around any amount of the circumference of the treatment chamber sidewall 172, such as at least 15% (e.g., at least 15%, 25%, 35%, 50%, 75%, 90% or 100%). For example, in the illustrated embodiments, the header 161 extends around at least 15% (see e.g., FIG. 8) and about 50% (see e.g., FIGS. 9 and 10) of the circumference of the treatment chamber sidewall 172.

[0544] The amount that the header 161 wraps around the air treatment chamber 128 may depend, for example, on the number of dirty air outlets 162 desired for the channel 160, the desired size of the dirty air outlets 162, and / or the desired spacing between the dirty air outlets 162. Any number of dirty air outlets 162 may be used, such as one, two (see e.g., FIG. 8), three (see e.g., FIG. 9), or more than three, such as seven (see e.g., FIG. 10). As shown in FIGS. 9 to 10, the size and / or spacing of the secondary dirty air outlets 162 may decrease as the number of secondary dirty air outlets 162 increases.

[0545] The width of the header 161 in a plane that is transverse to a direction of flow through the header 161 may be constant or may decrease in the downstream direction. It will be appreciated that the width of the header 161 may be the same as the downstream end of the linear portion of the air inlet conduit 156 that is located at the upstream end of the header 161.

[0546] Optionally, one or more of the dirty air outlets 162 may have a porous filtration material such as a mesh or a screen provided in the flow path. For example, in the embodiments illustrated in FIGS. 8 and 9, the first dirty air outlet 162 in the flow direction has a porous filtration material 168, shown as a screen. In such embodiments, at least one other dirty air outlet 162 may be open (i.e., may be free of / have an absence of any porous filtration material 168). For example, as exemplified in FIG. 8, two dirty air outlets 162 are provided, the upstream one having the porous filtration material 168 and the downstream one being free. If more than two dirty air outlets 162 are provided, then at least one, but not all, of the dirty air outlets may have a porous filtration material and the remainder are free. Optionally, the dirty air outlet 162 that is furthest downstream of all the dirty air outlets 162 may be open (see e.g., FIG. 9). Optionally, the remaining secondary dirty air outlets 1622 may also be open or, as shown in FIG. 9, have a porous filtration material 168.

[0547] The porous filtration material 168 of the upstream dirty air outlet 162 in FIG. 8 and the two upstream dirty air outlets 162 in FIG. 9 may permit dirty air carrying fine dirt particles to pass through to the corresponding chamber air inlet 176, while restricting the passage of coarse dirt particles. Those coarse dirt particles that may become stuck on the porous filtration material 168 of the upstream dirty air outlet(s) 162 may be stripped off of the porous filtration material 168 by the air flow in the header 161. The coarse dirt particles may then be carried downstream to the one or more dirty air outlets 162 which are free.

[0548] Optionally, the dirty air outlets 162 may provide gradated filtration of the dirty air flow. That is, the porous filtration material 168 of each dirty air outlet 162 may have a greater pore size than the porous filtration material 168 of the dirty air outlet 162 immediately upstream therefrom. In this way, dirt particles of successively greater size may be permitted to pass through a dirty air outlet 162 as the dirt particles travel further downstream in the header to the final open dirty air outlet 162.

[0549] Optionally, two or more of the dirty air outlets 162 (other than at least the downstream-most dirty air outlet) may share a common porous filtration material 168. In such embodiments, the common porous filtration material 168 may subdivide the header 161 into an inner header 1611 and an outer header 1612. The common porous filtration material 168 may extend, e.g., from the linear portion of the inlet conduit 156 angularly around part of the treatment chamber sidewall 172 at a location spaced radially outwardly of the chamber air inlets 176. Air may therefore pass through the common porous filtration material 168 and pass through the contained chamber air inlets 176 into the air treatment chamber 128.

[0550] The common porous filtration material 168 may have a single pores size or, optionally, a gradated pore size permitting successively larger dirt particles to pass through the porous filtration material 168 into the inner header 1611 as they travel further downstream in the outer header 1612.

[0551] It will be appreciated that the common porous filtration material 168 may be positioned adjacent the treatment chamber sidewall 172 and define dirty air outlets 162 of the header 161. However, as exemplified in FIG. 10, the common porous filtration material 168 is spaced apart from the exterior surface of the treatment chamber sidewall 172 radially outwardly of the dirty air outlets 162 to provide the inner header 1611 and the outer header 1612. In such embodiments, as shown, at least some of the dirty air outlets 162 radially inward of the common porous filtration material 168 may have a wall 260 protruding inwardly into the air inlet conduit 156 from the exterior surface of the treatment chamber sidewall 172 and extending part way through a radial thickness of the header 161. The common porous filtration material 168 may be supported on the walls 260.

[0552] As shown in FIG. 10, the walls 260 may each be a vane / deflector / hood positioned to direct air through the dirty air outlet 162 into the air treatment chamber. The vane / deflector / hood walls 260 may be configured to direct dirty air through the outlet / inlet port in the common wall shared between the conduit sidewall 158 and the treatment chamber sidewall 172. Accordingly, the walls 260 may extend from a downstream side of the corresponding dirty air outlet 162 and over the dirty air outlet 162 toward the upstream side thereof to catch and direct dirty air through outlet / inlet port in the common wall.

[0553] The cross-sectional shape of the air treatment chamber 128 may be generally circular at any location between the first and second end walls 174 in a plane that is transverse to the central axis 170. Optionally, the dimensions of the air treatment chamber 128 may vary at the location at which the header 161 wraps around the treatment chamber sidewall 172. That is, the radius of the generally circular cross-section (measured from the central axis 170 to the outer surface of the treatment chamber sidewall 172) may vary between the first and second end walls 174 according to the location of the air inlet conduit 156. For example, as shown in the embodiment illustrated in FIG. 48, the generally circular cross-section may have a first radius 2621 at one or more regions between the first and second end walls 174. Additionally, as shown, the generally circular cross-section may also have a second radius 2622 at another region between the first and second end walls 174. The first radius 2621 may be greater than the second radius 2622.

[0554] The one or more regions having the first radius 2621 may be spaced apart from the air inlet conduit 156. The region having the second radius 2622 may be at the location at which the header 161 wraps around the treatment chamber sidewall 172.

[0555] For example, in the embodiment illustrated in FIG. 49A, the air inlet conduit 156, and thus the header 161 and the region of the treatment chamber sidewall 172 having the second radius 2622, are centrally located between the first and second end walls 174 (see also e.g., FIGS. 30 and 31). The treatment chamber sidewall 172 further has two regions proximate the first and second end walls 174 having the first radius 2621. As shown, each region of the treatment chamber sidewall 172 having the first radius 2621 may be spaced apart from each region of treatment chamber sidewall 172 having the second radius 2622 by a transition region. The transition regions may have a gradually increasing radius moving from the region having the second radius 2622 to the region having the first radius 2621. In this way, as shown, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the air treatment chamber 128 may have a generally ‘bowtie’ shaped cross-section in a vertical plane that extends along the central axis 170 (e.g., taken along line 30-30 in FIG. 1).

[0556] The header 161 may be positioned at any other location, which may affect the cross-sectional shape of the air treatment chamber 128 in the vertical plane. For example, the air inlet conduit 156 and the header 161 may be positioned proximate one of the first and second end walls 174. In such embodiments, as shown in FIG. 49B, the region of the treatment chamber sidewall 172 having the second radius 2622 may be located proximate the one of the first and second end walls 174 proximate which the air inlet conduit 156 and header 161 are positioned, and the treatment chamber sidewall 172 may further have one region proximate the other of the first and second end walls 174 having the first radius 2621. These regions may be spaced apart by a transition region as described with respect to FIG. 49A. In this way, the air treatment chamber 128 may have a generally frusto-conically shaped cross-section in the vertical plane.

[0557] An advantage of the design in FIGS. 49A and 49B is that the header 161 may at least partially wrap around the treatment chamber sidewall 172 without the conduit sidewall 158 protruding beyond or significantly protruding beyond treatment chamber sidewall 172 having the first radius 2621. This, in turn, may provide a more compact hand vacuum 100. For example, as shown in FIG. 49A, a portion of a width of the conduit sidewall 158 around the header 161 in a direction that is transverse to the direction of air flow through the header 161 may be between the first radius 2621 and the second radius 2622. As shown, a remainder of the width of the conduit sidewall 158 may protrude beyond the first radius 2621. As another example, as shown in FIG. 49B, the full width of the conduit sidewall 158 may be between the first radius 2621 and the second radius 2622 (i.e., the second radius 2622 plus the width of the conduit sidewall 158 may be less than or equal to the first radius 2621).

[0558] Accordingly, the air treatment chamber 128 may be, e.g., a multi-inlet cyclone wherein the conduit sidewall 158 is at least partially, and optionally fully, nested within the first radius 2621 of the air treatment chamber 128. In this way, the air treatment chamber 128 may have multiple chamber air inlets 176 without increasing / substantially increasing the cross-sectional area of the air treatment assembly 124.Horizontal Cyclone Having Multiple Chamber Air Inlets

[0559] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general description and / or the detailed discussion, may have an air treatment chamber that is a horizontal cyclone which extends in a common direction with the axis 116 having a plurality of chamber air inlets.

[0560] As discussed with respect to a transverse cyclone having multiple chamber air inlets, the air flow path delivering air to the plurality of air inlets may be of various designs. For example, and as discussed in more detail subsequently, some or all of the plurality of chamber air inlets 176 may be downstream from one or more partially annular or a fully annular headers 161 (see e.g., FIG. 51). Alternately, or in addition, as discussed in more detail subsequently, a plurality of conduits may define discrete channels that feed one or more of the plurality of air inlets. Accordingly, two or more conduits, each of which defines a channel that is isolated from the other channel(s), may be provided. Alternately or in addition, a bypass channel may be used wherein one channel may branch off of another channel and a porous member may be provided at the interface of the two channels.

[0561] Further, the shape of the channel 160, header 161 and positioning of the dirty air outlets 162, and the use of a porous filtration member 168, such as the common porous filtration material 168, may be of any design discussed previously with respect to a transverse cyclone.

[0562] For example, in the embodiment illustrated in FIGS. 50 to 53, the air treatment chamber 128 of the hand vacuum 100 is a horizontal cyclone which extends in a common direction with the axis 116. As shown, in such embodiments, each of the hand vacuum axis 116, the conduit axis 164, and the central axis 170 may be generally parallel. Accordingly, at least a linear portion of the conduit sidewall 158 around the channel 160 may be generally parallel to the central axis 170.

[0563] Optionally, as exemplified in FIGS. 50 to 53, the linear portion of the air inlet conduit 156 may extend along the exterior surface of the treatment chamber sidewall 172, such as at the upper end of the air treatment chamber 128 (as shown), the lower end, a lateral side, or at any other location. Alternatively, the linear portion may optionally extend through the first end wall 1741 into the interior of the air treatment chamber 128. In such embodiments, the linear portion may extend along the interior surface of the treatment chamber sidewall 172 or, alternatively, extend into the air treatment chamber 128 at a location spaced apart from the treatment chamber sidewall 172 (e.g., centrally in the front wall of the cyclone chamber as exemplified in FIG. 76). In the latter embodiment, the conduit axis 164 may optionally be coaxial with the central axis 170.

[0564] The linear portion of the conduit sidewall 158 may extend any length along the air treatment chamber 128 such that the dirty air outlets 162 (and corresponding chamber air inlets 176) may be at any location at or between the first and second end walls 174. For example, the dirty air outlets 162 may be proximate the first (rear) end wall 1741 (as shown; see also e.g., FIG. 76), proximate the second (front) end wall 1742 (see e.g., FIG. 53), or any other location therebetween.

[0565] As discussed previously, the one or more channels 160 may be provided, each of which may terminate at one or more dirty air outlets 162 and each dirty air outlet 162 may be a port in the treatment chamber sidewall 172 of the air treatment chamber 128 whereby the dirty air outlet 162 and the chamber air inlet 176 are the same port or the dirty air outlet 162 may terminate at the inlet of an inlet, such as a tangential inlet to air treatment chamber 128. Any channel and inlet design discussed with respect to a transverse cyclone may be used with a horizontally extending cyclone.

[0566] For example, as shown in FIGS. 50 to 53, the upstream dirty air outlet 1621 has a porous filtration material 168. Each downstream dirty air outlet 1622, other than the downstream-most dirty air outlet 162, may also have a porous filtration material 168. Similarly, any of the dirty air outlets 162 may share a common porous filtration material 168 and / or each have a wall 260 similar to as described previously.

[0567] Alternatively, in embodiments where the linear portion extends through the first end wall 1741 into the interior of the air treatment chamber 128, the treatment chamber sidewall 172 and the conduit sidewall 158 may not share a common wall through which the dirty air outlets 162 pass to the corresponding chamber air inlets 176. Instead, as exemplified in FIG. 77, the dirty air outlets 162 may pass through the conduit sidewall 158 to the corresponding chamber air inlets 176. The porous filtration material 168 shown may optionally be omitted.

[0568] While the upstream dirty air outlet 1621 in the example embodiments described in this section is provided in a curved portion of the channel 160, it will be appreciated that the curved portion may optionally be omitted, and the upstream dirty air outlet 1621 may instead be provided in the linear portion. In such embodiments, the conduit sidewall 158 around the channel 160 may extend through the first end wall 1741 into the air treatment chamber 128, and the dirty air outlet 162 of the channel 160 may be axially opposed to the dirty air inlet 134 as described previously (i.e., an axial chamber air inlet).

[0569] Similar to as described previously, the cross-sectional shape of the air treatment chamber 128 may be generally circular at any location between the first and second end walls 174 in a plane that is transverse to the central axis 170, and the radius of the circular cross-section may optionally be varied depending on the location at which the header 161 wraps around the treatment chamber sidewall 172.Vertical Cyclone Having Multiple Chamber Air Inlets

[0570] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general description and / or the detailed discussion, may have an air treatment chamber that is a vertical cyclone having a plurality of chamber air inlets.

[0571] As discussed with respect to a transverse cyclone having multiple chamber air inlets, the air flow path delivering air to the plurality of air inlets may be of various designs. For example, and as discussed in more detail subsequently, some or all of the plurality of chamber air inlets 176 may be downstream from one or more partially annular or a fully annular headers 161 (see e.g., FIG. 56). Alternately, or in addition, as discussed in more detail subsequently, a plurality of air inlet conduits 156 may define discrete channels 160 that feed one or more of the plurality of air inlets. Accordingly, two or more conduits, each of which defines a channel that is isolated from the other channel(s), may be provided. Alternately or in addition, a bypass channel may be used wherein one channel may branch off of another channel and a porous member may be provided at the interface of the two channels.

[0572] Further, the shape of the channel 160, header 161 and positioning of the dirty air outlets 162, and the use of a porous filtration member 168, such as the common porous filtration material 168, may be of any design discussed previously with respect to a transverse cyclone.

[0573] For example, in the embodiment illustrated in FIGS. 54 to 58, the air treatment chamber 128 of the hand vacuum 100 is a vertical cyclone. As shown, in such embodiments, the hand vacuum axis 116 and the conduit axis 164 may be generally parallel, and the central axis 170 may be generally transverse to the hand vacuum axis 116 and conduit axis 164. Accordingly, at least a linear portion of the conduit sidewall 158 around the first channel 1601 may be transverse to the treatment chamber sidewall 172.

[0574] When the hand vacuum 100 in the illustrated embodiment is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, a horizontal plane that is transverse to the central axis 170 (i.e., the cross-sectional view shown in FIG. 56) may extend through each dirty air outlet 162, each chamber air inlet 176 of the air treatment chamber 128, the annular header 161 formed by the conduit sidewall 158 around the channel 160, and the air treatment chamber 128.

[0575] Similar to as described previously, the cross-sectional shape of the air treatment chamber 128 may be generally circular at any location between the first and second end walls 174 in a plane that is transverse to the central axis 170, and the radius of the circular cross-section may optionally be varied depending on the location at which the header 161 wraps around the treatment chamber sidewall 172.Multiple Chamber Air Inlets from Multiple Isolated Air Inlet Conduits

[0576] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber having a plurality of multiple air inlet conduits that are isolated from each other wherein each air inlet conduit extends to one or more chamber air inlet 176.

[0577] While the air treatment chambers in example embodiments described in this section are transverse cyclones, it will be appreciated that the features described herein may be equally applicable to horizontal cyclones which extend in a common direction with axis 166 and vertical cyclones. That is, an air treatment chamber that is a transverse cyclone, a horizontal cyclone, or a vertical cyclone may have a plurality of chamber air inlets from multiple air inlet conduits in accordance with this section.

[0578] Referring to FIGS. 11 and 12, in the illustrated embodiments, the hand vacuum 100 includes a first air inlet conduit 1561 and a second air inlet conduit 1562. Any other number of air inlet conduits 156 may be possible.

[0579] The air inlet conduits 156 may be provided at any location or combination of locations as described previously herein with respect to the single air inlet conduit 156. The air inlet conduits 156 may be laterally and / or vertically spaced apart from one another or they may be adjacent each other (vertically or laterally). For example, in the illustrated embodiments, the first air inlet conduit 1561 is a lower air inlet conduit and the second air inlet conduit 1562 is an adjacent upper air inlet conduit. That is, the first air inlet conduit 1561 is disposed below the second air inlet conduit 1562 when the hand vacuum 100 is oriented with the upper end 112 disposed immediately above the lower end 114.

[0580] The air inlet conduits 156 may each be configured as having a single dirty air outlet 162 (such as described with respect to e.g., FIGS. 3 and 6). Alternatively, the air inlet conduits 156 may each be configured as having multiple dirty air outlets 162 (such as described with respect to e.g., any of FIGS. 8 to 10). Optionally, the air inlet conduits 156 may have different configurations. For example, at least one of the air inlet conduits 156 may be configured as having a single dirty air outlet 162 and at least one other of the air inlet conduits 156 may be configured as having multiple dirty air outlets 162.

[0581] For example, in the vertical arrangement of the air inlet conduits 156 shown in each of FIGS. 11 and 12, the first air inlet conduit 1561 is configured as described with respect to FIG. 3 (i.e., with the dirty air outlet 162 axially opposed to the dirty air inlet 134). Accordingly, as shown, the conduit axis 164 of the first air inlet conduit 1561 intersects the dirty air inlet 134, the dirty air outlet 162, and the upper end of the air treatment chamber 128. The dirty air outlet 162 of the first air inlet conduit 1561 is open.

[0582] In the embodiment shown in FIG. 11, the dirty air outlet 162 of the second air inlet conduit 1562 is angularly positioned similar to as described with respect to the air inlet conduit 156 in FIG. 8. In the embodiment shown in FIG. 12, the dirty air outlet 162 of the second air inlet conduit 1562 is angularly positioned similar to as described with respect to FIG. 9.

[0583] Optionally, as shown, the second air inlet conduit 1562 may optionally pass over the air treatment chamber 128 such that the conduit axis 1642 of the second channel 1602 does not intersect the air treatment chamber 128.

[0584] The dirty air outlet(s) 162 of the second channel 1602 of the second air inlet conduit 1562 may be configured as described with respect to any of FIGS. 9 to 10. For example, the sole dirty air outlet 162 of the second air inlet conduit 1562 in FIG. 11 is open, while the upstream dirty air outlet 162 of the second air inlet conduit 1562 in FIG. 12 has a porous filtration material 168 and the downstream dirty air outlet 162 is open.Transverse Cyclone Having Multiple Chamber Air Inlets from an Air Inlet Conduit Having a Bypass Channel

[0585] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets from an air inlet conduit having a primary air outlet from a first channel and at least one secondary air outlet from a bypass channel.

[0586] An air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets from an air inlet conduit having primary air outlet from a first channel and at least one secondary air outlet from a bypass channel may confer similar advantages as described previously with respect to an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets. For example, increasing the number of chamber air inlets may enable the use of a smaller air treatment chamber, providing a more compact hand vacuum while still meeting or exceeding the minimum desirable separation efficiency of particulate matter from the dirty airflow. Additionally, the bypass second channel may advantageously provide pressure relief by distributing the airflow across different channels, which may mitigate pressure build-up, decreased separation efficiency, and / or burnout of the suction motor 140.

[0587] The bypass channel 1602 is a second channel that is downstream from an upstream or first channel 1601. The bypass second channel 1602 branches off from the first channel 1601. At a position at which the bypass second channel 1602 branches off from the first channel 1601, a porous member, such as a screen, may be provided to limit the size of dirt that may move with the air flow from the first channel 1601 into the bypass second channel 1602.

[0588] Optionally, the bypass second channel 1602 may branch off of the first channel 1601 at the downstream end of the first channel 1601.

[0589] As shown in FIGS. 13A, 13B, and 33A, the bypass second channel 1602 is physically divided from the first channel 1601. The first channel 1601 is in fluid flow communication with the bypass second channel 1602 through the channel communication port 166. As shown, the channel communication port 166 may be provided in the conduit sidewall 158 between the channels 160 within the overlapping length of the channels. The channel communication port 166 may be at any location within the overlapping length downstream of the dirty air inlet 134. In this way, as shown, the airflow path 138 may travel, e.g., generally radially outwardly (upwardly radially outwardly, in the illustrated embodiments) from the first channel 1601 through the channel communication port 166 into the bypass second channel 1602. In such embodiments, the conduit sidewall 158 around the bypass second channel 1602 may direct the airflow therein to one or more downstream secondary dirty air outlets 1622.

[0590] Optionally, as shown in FIG. 13B, the channel communication port 166 may be open (i.e., free of any porous filtration material). Alternatively, as shown in FIGS. 13A and 33A, the channel communication port 166 may optionally include a porous filtration material 168, such as a screen or mesh, over the channel communication port 166. In such embodiments, the porous filtration material 168 may operate similarly to as described previously. In particular, in operation, some air travelling through the first channel 1601 passes through the porous filtration material 168 into the bypass second channel 1602. Similar to as described with respect to FIGS. 8 to 10, the porous filtration material 168 may permit dirty air carrying fine dirt particles to pass through to the bypass second channel 1602, while restricting the passage of coarse dirt particles. Those coarse dirt particles that may become stuck on the porous filtration material 168 may be stripped off by the airflow travelling to the primary dirty air outlet 1621 of the first channel 1601 and through the corresponding chamber air inlet 176. The fine dirt particles may then be carried downstream through the bypass second channel 1602 to the one or more secondary dirty air outlets 1622 and through the corresponding chamber air inlet 176.

[0591] The first channel 1601 and the second channel 1602 may each be considered to be downstream of the air inlet conduit 156. The second channel 1602 may each be considered to be downstream of the first channel 1601.

[0592] A portion of the bypass second channel 1602 may overlap (e.g., extend generally in the same direction as) at least a portion of the first channel 1601. The bypass second channel 1602 and the first channel 1601 may be laterally or vertically adjacent to one another such that the overlapping length is at a lateral side, upper side, and / or lower side of each second channel 1602. For example, in the embodiments illustrated in FIGS. 13A, 13B, 33A, and 33B, the first channel 1601 is below the bypass second channel 1602 such that a portion of the upper side of the first channel 1601 overlaps (extends concurrently with) a portion of the lower side of the bypass second channel 1602. That is, the first channel 1601 is disposed below the bypass second channel 1602 when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114. In any embodiment, the channels may share a common wall for at least part of their length in the flow direction.

[0593] Similarly, the one or more secondary dirty air outlets 1622 of the bypass second channel 1602 may be configured as described previously with respect to the downstream dirty air outlet(s) 162 of any of FIGS. 8 to 10. For example, in the illustrated embodiments, the first channel 1601 and the primary dirty air outlet 1621 thereof, and the second channel 1602 and the secondary dirty air outlet 1622 thereof, are configured similar to as described with respect to FIG. 8.

[0594] Accordingly, the first channel 1601 may have one or more primary dirty air outlets 1621 which may be configured as described previously, such as described with respect to the upstream dirty air outlet 162 of any of FIGS. 8 to 10. Accordingly, as exemplified in FIG. 33A, the only dirty air outlet 1621 (or optionally the upstream dirty outlet 1621 or upstream dirty outlets 1621) may have an absence of a porous filtration material 168. Alternately, if the first channel 1601 has a plurality of dirt outlets 1621, then the upstream dirty outlet 1621 or upstream dirty outlets 1621 may have a porous filtration material 168 and the downstream dirty air outlets 1621 or the downstream most dirty air outlet 1621 may have an absence of a porous filtration material 168.

[0595] The channel communication port 166 may be at any location within the overlapping length downstream of the dirty air inlet 134. In this way, as shown, the airflow path 138 may travel generally radially outwardly (upwardly radially outwardly, in the illustrated embodiments) from the first channel 1601 through the channel communication port 166 into the bypass second channel 1602.Vertical Cyclone Having Multiple Chamber Air Inlets from an Air Inlet Conduit Having a Bypass Channel

[0596] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a vertical cyclone having a plurality of chamber air inlets from an air inlet conduit having primary air outlet from a first channel and at least one secondary air outlet from a bypass channel.

[0597] The shape and positioning of the first channel 1601 and the bypass second channel 1602 may be of any design discussed previously and may have one or more dirty air outlets of any design discussed previously.

[0598] Referring now to the embodiments illustrated in FIGS. 59 to 62 and 63 to 65, as best shown in FIGS. 61 and 65, the second channel 1602 downstream of the air inlet conduit 156 may be a bypass second channel 1602. The bypass second channel 1602 may confer similar advantages to those described previously with respect to an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets from an air inlet conduit having primary air outlet from a first channel and at least one secondary air outlet from a bypass channel.

[0599] Optionally, the first channel 1601 and the one or more primary dirty air outlets 1621 thereof, and the bypass second channel 1602 and the one or more secondary dirty air outlets 1622 thereof, may be configured as described previously, such as with respect to FIGS. 13A, 13B, 33A, and 33B (with the air treatment chamber 128 and air inlet conduit 156 rotated 90° such that the central axis 170 is vertically oriented). Accordingly, the linear portion of the conduit sidewall 158 around the first channel 1601 may extend generally parallel to the hand vacuum axis 116, and the bypass second channel 1602 may overlap at least a portion of the first channel 1601.

[0600] Optionally, the bypass second channel 1602 may branch off of the first channel 1601 at the downstream end of the first channel 1601. This configuration may be desirable where, as shown, the linear portion of the conduit sidewall 158 around the first channel 1601 extends at an acute angle to the hand vacuum axis 116. The linear portion of the conduit sidewall 158 around the first channel 1601 may extend at an acute angle to the hand vacuum axis 116 to provide a centrally located dirty air inlet 134 (i.e., centered between the lateral sides of the air treatment chamber 128) and a tangential chamber air inlet 176 corresponding to the primary dirty air outlet 1621.

[0601] The first channel 1601 may be in fluid flow communication with the bypass second channel 1602 through the channel communication port 166. As shown, the channel communication port 166 may be provided at the downstream end of the first channel 1601 proximate the primary dirty air outlet 1621 thereof such that one conduit axis 1641 may extend through both the dirty air inlet 134 and the primary dirty air outlet 1621 and another conduit axis 1642 may extend through both the dirty air inlet 134 and the channel communication port 166. In this way, as shown, the airflow path 138 may travel generally axially from the first channel 1601 through the channel communication port 166 into the bypass second channel 1602.

[0602] Optionally, as discussed previously, the channel communication port 166 may be open (i.e., free of any porous filtration material). Alternatively, as shown in FIGS. 61 and 65, the channel communication port 166 may include a porous filtration material 168, such as a screen or mesh, over the channel communication port 166. In such embodiments, the porous filtration material 168 may operate similarly to as described previously such that, in operation, some air travelling through the first channel 1601 carrying fine dirt particles passes through the porous filtration material 168 into the second channel 1602 and carried to the one or more secondary dirty air outlets 1622 thereof. Restricted coarse dirt particles that may become stuck on the porous filtration material 168 may be stripped off by the airflow travelling to the primary dirty air outlet 1621 of the first channel 1601.Horizontal Cyclone Having Multiple Chamber Air Inlets from an Air Inlet Conduit Having a Bypass Channel

[0603] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a horizontal cyclone having an axis that extends in a common direction with the axis 166 with a plurality of chamber air inlets from an air inlet conduit having one or more primary air outlets from a first channel and one or more secondary air outlets from a bypass channel.

[0604] The shape and positioning of the first channel 1601 and the bypass second channel 1602 may be of any design discussed previously and may have one or more dirty air outlets of any design discussed previously.

[0605] As exemplified in FIGS. 66 to 69, 70 to 73, 74 to 77, and 78 to 82, as best shown in FIGS. 66, 71, and 77, the second channel 1602 of the air inlet conduit 156 is a bypass second channel 1602. The bypass second channel 1602 may confer similar advantages to those described previously with respect to an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets from an air inlet conduit having primary air outlet from a first channel and at least one secondary air outlet from a bypass channel.

[0606] The air inlet conduit 156 may be configured any way as described with respect to the air treatment chamber that is a horizontal cyclone having a plurality of chamber air inlets. For example, in the illustrated embodiments, the conduit sidewall 158 of each channel includes a linear portion around the first channel 1601 extending in the direction of the conduit axis 164. As shown, the conduit axis 164, the hand vacuum axis 116, and the central axis 170 of the air treatment chamber 128 are generally parallel. Additionally, the conduit sidewall 158 of each channel may include a curved portion around the first channel 1601 and a curved portion around the second channel 1602.

[0607] In the embodiments illustrated in FIGS. 66 to 69, 70 to 73, and 78 to 82, the linear portion of the conduit sidewall 158 around the first channel 1601 extends along the exterior surface of the treatment chamber sidewall 172 at the upper end of the air treatment chamber 128. As shown, the linear portion extends to the rear end of the air treatment chamber 128 and feeds into the curved portion of the first channel 1601 and the bypass second channel 1602 downstream therefrom. Accordingly, the primary dirty air outlet 1621 of the first channel 1601 in the curved portion of the conduit sidewall 158, the secondary dirty air outlet(s) 1622 of the bypass second channel 1602, and the corresponding chamber air inlets 176, are located proximate the second end wall 1742.

[0608] The conduit sidewall 158 around the curved portion of the first channel 1601 and the bypass second channel 1602 may be configured similar to as described previously with respect to FIGS. 50 to 53. For example, in the embodiments illustrated in FIGS. 66 to 69, 70 to 73, and 78 to 82, the first channel 1601 is in fluid communication with the second channel 1602 through the channel communication port 166 proximate the primary dirty air outlet 1621 provided in the curved portion of the conduit sidewall 158 between the first and second channels 160.

[0609] Additionally, the conduit sidewall 158 around the curved portion of the first and second channels 160 may wrap around at least a portion of the treatment chamber sidewall 172 forming a partially annular or fully annular header around the air treatment chamber 128 as described previously. For example, in the embodiments illustrated in FIGS. 66 to 69 and 70 to 73, the conduit sidewall 158 around the bypass second channel 1602 and the curved portion of the first channel 1601 extends around about 25% of the treatment chamber sidewall 172 of the air treatment chamber 128. As another example, in the embodiments illustrated in FIGS. 79 to 80 and 81 to 82, the conduit sidewall 158 around the bypass second channel 1602 and the curved portion of the first channel 1601 extends around about 75% of the treatment chamber sidewall 172 of the air treatment chamber 128. In such embodiments, as shown, the conduit sidewall 158 around the bypass second channel 1602 may pass below the lower end of the air treatment chamber 128 between the dirt collection chamber 132 (see e.g., FIG. 79), the second stage dirt collection chamber 1322 (see e.g., FIG. 81), or a common dirt collection chamber.

[0610] In the embodiment illustrated in FIGS. 74 to 77, the linear portion extends through the second end wall 1742 into the interior of the air treatment chamber 128 at a location spaced apart from the treatment chamber sidewall 172. As shown, the conduit axis 164 of a linear portion of the conduit sidewall 158 around the first channel 1601 may optionally be coaxial with the central axis 170. As shown, the linear portion extends to a location between the front and rear ends of the air treatment chamber 128. Accordingly, the primary dirty air outlet 1621, the secondary dirty air outlet(s) 1622, and the corresponding chamber air inlets 176, are located interior to the air treatment chamber 128 proximate the second (front) end wall 1742.

[0611] As described previously, the first channel 1601 may be in fluid flow communication with the bypass second channel 1602 through the channel communication port 166. As shown, the channel communication port 166 may be provided at the downstream end of the linear portion of the first channel 1601 proximate the location where the linear portion of the first channel 1601 feeds into the curved portion of the first channel 1601 (see e.g., FIGS. 77A and 77B). That is, as shown, both the bypass second channel 1602 and the curved portion of the first channel 1601 branch off of the linear portion of the first channel 1601 at the downstream end thereof such that the air flow may travel radially outwardly from the linear portion of the first channel 1601 into the bypass second channel 1602 and the curved portion of the first channel 1601.

[0612] Alternatively, optionally only the curved portion of the first channel 1601 may branch off of the linear portion of the first channel 1601, and the curved portion of the first channel 1601 may feed into the bypass second channel 1602 as described with respect to FIGS. 66 and 71. As a further alternative, the curved portion of the first channel 1601 may optionally be omitted and only the bypass second channel 1602 may branch off of the linear portion of the first channel 1601. In such embodiments, the primary dirty air outlet 1621 may be axially opposed to the dirty air inlet 134 (i.e., an axial chamber air inlet).

[0613] In any embodiment if the linear portion of conduit sidewall 158 around the first channel 1601 extends through the first end wall 1741 into the air treatment chamber 128, since the conduit sidewall 158 around the curved portion of the first channel 1601 and the bypass second channel 1602 is interior to the air treatment chamber 128, the inlet / outlet port between each dirty air outlet 162 and the corresponding chamber air inlet 176 may be through the conduit sidewall 158 only (i.e., not through a common wall shared with the treatment chamber sidewall 172) (see e.g., FIGS. 77A and 77B).

[0614] In any embodiment, the channel communication port 166 may optionally include the porous filtration material 168. In such embodiments, the primary dirty air outlet 1621 may be open and the secondary dirty air outlet(s) 1622 may have any configuration as described previously. For example, as shown in FIGS. 66 to 69, 70 to 73, 74 to 77, and 78 to 82, the channel communication port 166 includes the porous filtration material 168 and both of the primary dirty air outlet 1621 and the sole secondary dirty air outlet 1622 are open. In such embodiments, the porous filtration material 168 of the channel communication port 166 may operate similarly to as described previously such that, in operation, some air travelling through the first channel 1601 carrying fine dirt particles passes through the porous filtration material 168 into the bypass second channel 1602 to the one or more secondary dirty air outlets 1622 thereof. Restricted coarse dirt particles that may become stuck on the porous filtration material 168 may be stripped off by the airflow travelling to the primary dirty air outlet 1621 of the first channel 1601 (see e.g., FIGS. 66 and 71) or into the curved portion of the first channel 1601 (see e.g., FIGS. 77A and 77B).

[0615] Accordingly, while described separately with respect to a transverse, horizontal or vertical cyclone, any feature of an air treatment chamber, such as a cyclone chamber, having a bypass channel may be used with an air treatment chamber (e.g., cyclone) having any orientation.Air Treatment Chamber Having Multiple Chamber Air Inlets from an Air Inlet Conduit Having an Electrical Connector

[0616] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber having a plurality of chamber air inlets from an air inlet conduit having an electrical connector proximate the dirty air inlet.

[0617] As described previously, in addition to functioning as a nozzle, this design may advantageously enable the air inlet conduit 156 to be electrically connected (directly or indirectly via the wand 104) to the wand 104 or any suitable accessory tool upon mechanically connecting to the hand vacuum 100.

[0618] In any embodiment, the air treatment chamber 128 having a plurality of chamber air inlets 172 may be cyclonic, such as a transverse cyclone (see e.g., FIGS. 8, 9, 10, 11, 12, 13A, 13B, 33A, and 33B), a horizontal cyclone (see e.g., FIGS. 50 to 53, 66 to 69, 70 to 73, and 78 to 82), or a vertical cyclone (see e.g., FIGS. 54 to 58, 59 to 62, and 63 to 65). In any such embodiments, the air treatment chamber 128 may be downstream from the air inlet conduit 156 having the electrical connector 244 proximate the dirty air inlet 134, and the air inlet conduit 156 may have a header 161 feeding a plurality of air inlets (see e.g., FIGS. 8, 9, 10, 50 to 53, and 54 to 58), a bypass air conduit (see e.g., FIGS. 13A, 13B, 33A, 33B, 59 to 62, 63 to 65, 66 to 69, 70 to 73, and 78 to 82), or one of a plurality of air inlet conduits (see e.g., FIGS. 11 and 12).

[0619] In these embodiments, the air inlet conduit 156 of each of the various configurations includes the electrical connector 244 proximate the dirty air inlet 134, and the electrical connector 244 is detachably matingly connectable to the electrical connector 244 of the wand 104 or accessory tool. Upon mating connection of the electrical connectors 244, power may be supplied from the energy storage members 144 and / or electrical cord of the hand vacuum 100 to the wand 104 or accessory tool via wiring 246. The wiring 246 may follow any path through the hand vacuum 100 from the power supply to the electrical connector 244 as described previously herein.Transverse Cyclone Having an Air Outlet at One End Wall

[0620] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone having and an air outlet at one end wall.

[0621] In any embodiment, such as in the embodiment illustrated in FIGS. 22 and 27, the air treatment chamber 128 may have one chamber air outlet. As shown, the chamber air outlet may be provided at either one of the first and second end walls174. The chamber air outlet may have an outlet port through the one of the first and second end walls 174 (i.e., as shown) or, alternatively, through the treatment chamber sidewall 172 proximate the one of the first and second end walls 174.

[0622] The chamber air outlet may be configured any way as described previously herein. For example, as shown in the illustrated embodiments, each chamber air outlet may have the porous member 180 positioned over the chamber air outlet port 178 and extending axially inwardly into the air treatment chamber 128 from the respective end wall 174. Further, as shown, each chamber air outlet may have an air outlet conduit 182 extending from an outlet end of the conduit 182 at the respective end wall 174 to the distal inlet end axially spaced inwardly from the end wall 174, and the porous member 180 may extend axially inwardly into the air treatment chamber 128 from the distal end of the air outlet conduit 182.

[0623] Optionally, as shown in FIG. 22, if a chamber air outlet is provided at only one of the end walls 174, the air treatment chamber 128 may optionally include an air impermeable vortex finder 184 extending axially inwardly into the air treatment chamber 128 from the other end wall 174. Alternatively, as shown in FIG. 27, the other of the end walls 174 may optionally be an air impermeable, solid planar wall.

[0624] The air inlet conduit 156 may be of any design as described herein. Accordingly, the inlet / outlet port extending from each of the one or more dirty air outlets 162 of the air inlet conduit 156 to the corresponding chamber air inlet 176 may be provided through the common wall shared between the conduit sidewall 158 and the treatment chamber sidewall 172.

[0625] In any embodiment, if the chamber air outlet is provided at one of the end walls 174, the at least one chamber air inlet 176 may be generally centrally located (e.g., midway) between the first and second end walls 174 (see, e.g., FIG. 27). As described previously, this design may generate a hybrid airflow path 138 within an air treatment chamber 128 such as a cyclone chamber. Alternately, such as shown in the embodiment illustrated in FIG. 22, the at least one chamber air inlet 176 may be provided at the end wall opposed to the end wall with the air outlet (i.e., a uniflow configuration as described previously). In either of such of the illustrated embodiments, as shown, the chamber air inlet(s) 176 may be located axially inwardly from the porous member 180. Alternately, the air inlet may be located at the same end as the air outlet.

[0626] In any embodiment, the air treatment chamber 128, treatment chamber sidewall 172, optional moveable portion 188, and dirt outlet(s) 192 may be configured as shown in the illustrated embodiments or may have any other configuration as described herein.Transverse Cyclone Having Vortex Finders at Both End Walls

[0627] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone having and a vortex finder at both end walls and one or both of which may be an air outlet. The vortex finders at both end walls may advantageously assist in generating and / or maintaining a cyclonic airflow path within the air treatment chamber.

[0628] As shown in the embodiments illustrated in FIGS. 22 and 24 to 26, the chamber air outlet may be provided at one (see e.g., FIG. 22) or both (see e.g., FIGS. 24 to 26) of the first and second end walls 174. The chamber air outlet may comprise an outlet port through the one of the first and second end walls 174 (i.e., as shown). Alternatively, in some embodiments, the chamber air outlet may comprise an outlet port through the treatment chamber sidewall 172 proximate one of the first and second end walls 174. In such embodiments, the airflow path 138 may exit the air treatment chamber 128 into an air outlet duct 208 at the upper end or lower end of the air treatment chamber 128 or, alternatively, in the rearward direction into an air outlet duct 208, subsequent cleaning stage 126, or the main body housing 120.

[0629] As described previously, the porous member 180 of each chamber air outlet may, alone or collectively with their respective air outlet conduits 182 (if present), be referred to herein as porous vortex finders 180. Accordingly, the porous vortex finders 180 may be of any configuration as described herein with respect to the porous member 180 alone or in combination with the air outlet conduit 182.

[0630] As shown in FIGS. 24 to 26, if a chamber air outlet is provided at both of the first and second end walls 174, the air treatment chamber 128 may similarly include the porous vortex finder 180 at each end wall 174.

[0631] Alternatively, as shown in FIG. 22, if only one chamber air outlet is provided in one of the first and second end walls 174, the air treatment chamber 128 may similarly include the porous vortex finder 180 at the one of the first and second end walls 174. In such embodiments, as shown, the opposed end wall 174 may be a solid planar wall (i.e., air impermeable see e.g., FIG. 22) and the air treatment chamber 128 may optionally include an air impermeable vortex finder 184 provided at the opposed end wall 174 (see e.g., FIG. 22). Similarly, in embodiments wherein the chamber air outlet is provided in the treatment chamber sidewall 172 proximate one of the first and second end walls 174, the first and second end walls 174 may be solid planar walls, and the air treatment chamber 128 may include impermeable vortex finders 184 at each end wall 174.

[0632] In any such embodiments, each impermeable vortex finder 184 may extend axially inwardly into the air treatment chamber 128 from its respective end wall 174 similar to as described with respect to the porous vortex finder 180. The impermeable vortex finder 184 may be a solid member having any shape as described with respect to the porous vortex finder 180. The shape may be the same as or, optionally, different from the shape of the porous vortex finder 180 used in the cyclone chamber. For example, the impermeable vortex finder 184 may be semi-spherical, cylindrical, conical, or frusto-conical (as shown).

[0633] The air inlet conduit 156 may be of any design as described herein. Accordingly, the inlet / outlet port extending from each of the one or more dirty air outlets 162 of the air inlet conduit 156 to the corresponding chamber air inlet 176 may be provided through the common wall shared between the conduit sidewall 158 and the treatment chamber sidewall 172.

[0634] In embodiments having only one chamber air outlet is present, the at least one chamber air inlet 176 may be located proximate the end wall 174 at which the chamber air outlet is positioned, proximate the opposed end wall 174 (see e.g., FIG. 22), or generally centrally located (e.g., midway) between the first and second end walls 174 similar to as described previously. In embodiments wherein more than one chamber air outlet is present, the at least one chamber air inlet 176 may be located proximate either of the end walls 174 or generally centrally located between the first and second end walls 174 similar to as described previously (see e.g., FIGS. 24 to 26). Any other location may be used.

[0635] In any embodiment, the air treatment chamber 128, treatment chamber sidewall 172, optional moveable portion 188, and dirt outlet(s) 192 may be configured as shown in the illustrated embodiments or may have any other configuration as described herein.Trapezoidal Transverse Cyclone

[0636] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a trapezoidal transverse cyclone. This design may advantageously provide a more compact hand vacuum 100.

[0637] For example, referring to FIGS. 25 and 27 the air treatment chamber 128 has a trapezoidal cross-sectional shape in a horizontal plane that is parallel to both the hand vacuum axis 116 and the central axis 170 (i.e., along line 3-3 in FIG. 1). Similarly, the air treatment chamber 128 in FIGS. 34 to 35 has a trapezoidal cross-sectional shape in a horizontal plane that is parallel to both the hand vacuum axis 116 and the central axis 170 (i.e., along line 34-34 in FIG. 32).

[0638] As shown, the treatment chamber sidewall 172 at the front end of the air treatment chamber 128 is longer in the transverse direction between the first and second end walls 174 than the treatment chamber sidewall 172 at the rear end of the air treatment chamber 128. Accordingly, the air treatment chamber 128 is wider at the front end and narrows in the direction of the hand vacuum axis 116 toward the rear end. This may enable the airflow path 138 from each chamber air outlet to travel rearwardly in each air outlet duct 208 within the cross-sectional area of the front end of the air treatment chamber 128. That is, each air outlet duct 208 may be shaped corresponding to the particular trapezoidal cross-sectional shape of the air treatment chamber 128 such that the airflow path 138 from each chamber air outlet may travel rearwardly from the first and / or second transversely opposed end walls 174 without requiring the air treatment assembly 124 to be wider in the transverse direction.

[0639] Each air outlet duct 208 extending along the exterior of the corresponding end wall 174 of the air treatment chamber 128 may be shaped so as to not protrude outwardly beyond the corresponding end wall 174 at the front end of the air treatment chamber 128. Accordingly, each air outlet duct 208 may be generally triangular (e.g., right-angle triangle) in cross-sectional shape (see e.g., FIGS. 25, 27, 34, and 35) to produce a generally rectangular cross-sectional shape of the air treatment assembly 124 in the horizontal plane (i.e., taken along line 3-3 in FIG. 1 and line 34-34 in FIG. 32). Accordingly, the maximum transverse dimension of the air treatment assembly may be the same as the axial length of the treatment chamber sidewall 172 at the front end of the chamber 128. The axial dimension of the outlet ducts 208 may increase in the downstream (rearward) direction as the axial length of the sidewall 172 decreases. It will be appreciated that the duct 208 at the front end may extend axially outwardly from the end wall 174 and the axial dimension of the outlet ducts 208 may increase in the downstream (rearward) direction as the axial length of the sidewall 172 decreases. It will also be appreciated that the longest side of the chamber need not be the front side but may be the rear side, if the air flow from the chamber 128 extends, e.g., forwardly in the downstream direction.

[0640] In operation, air travels in a direction of flow through each air outlet duct 208 (rearward, in the illustrated embodiments). To be correspondingly shaped to the trapezoidal air treatment chamber 128, each air outlet duct 208 may have a cross-sectional flow area in a plane transverse to the direction of flow and / or in the direction of the central axis 170. Accordingly, as shown, the cross-sectional flow area increases in the downstream direction (i.e., in the direction of the hand vacuum axis 116 from the front end of the air treatment chamber 128 to the rear end thereof). Optionally, as shown in each of FIGS. 25, 27, and 34 to 35, the width of the air treatment chamber 128 may decrease generally linearly from the front end to the rear end. The cross-sectional flow area of each air outlet duct 208 may therefore increase generally linearly in the downstream direction corresponding to the decreasing width of the air treatment chamber 128.

[0641] Optionally, only one air outlet duct 208 may be provided (see e.g., FIG. 27). Alternatively, two air outlet ducts 208 may be provided (see e.g., FIGS. 25, and 34 to 35). In either case, each air outlet duct 208 may be shaped corresponding to the air treatment chamber 128 such that the air outlet duct 208 is positioned between the corresponding end wall 174 and a lateral side of the hand vacuum 100, which may be the lateral side of the air treatment assembly.

[0642] Optionally, each air outlet duct 208 may extend to a second cleaning stage 1262, which may be rearward of the air treatment chamber 128. In such embodiments, as shown in FIGS. 34 to 35, a downstream end of the air outlet ducts 208 may extend to one or more chamber air inlets 210 of each air treatment chamber 128 of the second cleaning stage 1262.

[0643] Alternatively, if a second cleaning stage 1262 is not provided, each air outlet duct 208 may extend rearwardly from the air treatment chamber 128 along an interior of the main body housing 120. For example, as shown in the embodiment illustrated in FIGS. 25 and 27, the upstream portion of the air outlet ducts 208 extending along the chamber 128 may be generally triangular in cross-sectional shape and the downstream portion of the duct 208, which may be in the main body housing 120 may be generally rectangular in cross-sectional shape. Accordingly, as shown, each air outlet duct 208 may extend along both the exterior of the corresponding end wall 174 of the air treatment chamber 128 and within the interior of the main body housing 120 without increasing the cross-sectional area thereof. Each air outlet duct 208 may extend rearwardly to a pre-motor filter 148 or suction motor 140 positioned in the main body housing 120 at the downstream end of the air outlet duct 208. It will be appreciated that part or all of the downstream portion of the duct 208 may be part of a header for a pre-motor filter or may extend to a header for a pre-motor filter.

[0644] It will be appreciated that, in other embodiments, the air treatment chamber 128 may be trapezoidal in any other plane, and the air outlet ducts 208 can be correspondingly shaped in that same plane as described previously. For example, the air treatment chamber 128 may have a trapezoidal cross-sectional shape in a vertical plane that is transverse to the hand vacuum axis 116 and parallel to the central axis 170 (e.g., along line 30-30 in FIG. 1). In such embodiments, the treatment chamber sidewall 172 at one of the upper and lower ends of the air treatment chamber 128 may be longer in the transverse direction between the first and second end walls 174 than the treatment chamber sidewall 172 at the other of the upper and lower ends. Similarly, each air outlet duct 208 extending along the exterior of the corresponding end wall 174 of the air treatment chamber 128 may be shaped so as to not protrude outwardly beyond the corresponding end wall 174 at the wider of the upper and lower ends of the air treatment chamber 128. In such embodiments, the direction of flow through each air outlet duct 208 may optionally be upward or downward (e.g., similar to as shown in FIG. 37).Concurrently Openable Transverse Cyclone and Dirt Collection Chamber Front Door

[0645] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone wherein the cyclone and a dirt collection chamber each have a front door that open concurrently.

[0646] In any embodiment, the air treatment assembly 124 may include an openable portion at the front end thereof that is moveable between a closed position, in which the hand vacuum 100 is operable to clean a surface, and an open position, in which the dirt collection chamber 132 and air treatment chamber 128 are open. Accordingly, in some embodiments, the openable portion of the air treatment assembly 124 may include the front door 202 of the dirt collection chamber 132, which may be a front door of the air treatment assembly 124, and the moveable portion 188 of the treatment chamber sidewall 172. In such embodiments, this may advantageously enable the dirt collection chamber 132 and the dirt collection region 130 of the air treatment chamber 128 to be emptied concurrently. That is, as described previously, when the openable portion (front door 202 and moveable portion 188) is in the open position, the dirt collection region 130 may be placed in communication with the dirt collection chamber 132, which is itself placed in communication with an exterior of the hand vacuum 100, such that the dirt collection region 130 and dirt collection chamber 132 may be concurrently emptied.

[0647] In such embodiments, the openable portion of the air treatment assembly 124 may be rotatable about the mount 190 (i.e., a rotational mount). The rotational mount 190 may be provided at any suitable location, such as those described previously herein. The location of the rotational mount 190 may be chosen to provide any openable portion with any directional motion, such as those described previously herein. Any type of rotational mount may be used. As exemplified, a pivot mount is used.

[0648] As exemplified, a single rotational mount 190 may be used. The mount 190 may be provided on one or both of the front door 202 of the dirt collection chamber 132 and the moveable portion 188 of the treatment chamber sidewall 172. For example, the rotational mount 190 may be provided at an end of one of the front door 202 and the moveable portion 188 and the front door 202 and the moveable portion 188 may be connected together so they move concurrently. Alternatively, as described in greater detail in the subsequent section, separate mounts 190 may be used for the front door 202 and the moveable portion 188. Separate mounts 190 may enable the front door 202 and the moveable portion 188 to move concurrently or separately sequentially.

[0649] Referring to FIGS. 15A and 15B, in the illustrated embodiment, the openable portion of the air treatment assembly 124 includes the front door 202 of the dirt collection chamber 132 and the moveable portion 188 of the treatment chamber sidewall 172. As shown, the rotatable mount 190 is provided at the front end of the air treatment chamber 128, which is also the front end of the air treatment assembly 124, at an upper end of the front door 202 such that, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the openable portion rotates forwardly and upwardly. Optionally, as shown in the illustrated embodiment, the rotational mount 190 is located above the mid-line of the air treatment chamber 128 (i.e., above a horizontal plane that extends along the central axis 170 at an elevation equidistantly between the lower end of the air treatment chamber 128 and the upper end of the air treatment chamber 128).

[0650] In the illustrated embodiment, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, at least a portion of the dirt collection chamber 132 is positioned below the air treatment chamber 128. Accordingly, each dirt outlet 192, having any configuration and orientation as described previously herein, may be provided in the lower end of the air treatment chamber 128 facing generally downwardly into the dirt collection chamber 132.

[0651] Additionally, when the openable portion of the air treatment assembly 124 moves from the closed position to the open position, the rotational path of the moveable portion 188 passes through the dirt collection chamber 132. During this movement, as the moveable portion 188 swings through a portion of the dirt collection chamber 132, the moveable portion 188 may contact and push out some or all dirt and debris out of the dirt collection chamber 132. Therefore, the moveable portion 188 may be used to assist in pushing particulate matter from the dirt collection chamber 132 through the open front door 202. Accordingly, the moveable portion 188 may optionally be sized such that a distal end thereof comes into close proximity with the bottom wall 198 of the dirt chamber sidewall 194 and / or the lateral edges come into close proximity with the lateral sides of the dirt chamber sidewall 194.

[0652] In embodiments such as FIGS. 15A and 15B wherein at least a portion of the dirt collection chamber 132 is positioned below the air treatment chamber 128, the remaining components of the hand vacuum 100 may be at any position as described herein. The components of the hand vacuum 100 may be positioned such that an alignment axis 264 that is parallel to hand vacuum axis 116 extends through the dirt collection chamber 132, and through one or more of the pre-motor filter 148, energy storage member housing 146, suction motor 140, and post-motor filter 150. The alignment axis 264 may be at any position between the lower end of the air treatment chamber 128 and the bottom wall 198 of the dirt collection chamber 132.

[0653] For example, in the embodiment illustrated in FIG. 15A, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand ...

Examples

Embodiment Construction

[0351]Various apparatus, methods and compositions are described below to provide an example of an embodiment of each claimed invention. No embodiment described below limits any claimed invention and any claimed invention may cover apparatuses and methods that differ from those described below. The claimed inventions are not limited to apparatus, methods and compositions having all of the features of any one apparatus, method or composition described below or to features common to multiple or all of the apparatus, methods or compositions described below. It is possible that an apparatus, method or composition described below is not an embodiment of any claimed invention. Any invention disclosed in an apparatus, method or composition described below that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicant(s), inventor(s) and / or owner(s) do not intend to abandon, disclaim, or dedicat...

FIELD

[0001] This disclosure relates generally to surface cleaning apparatus. In a preferred embodiment, the surface cleaning apparatus comprises a portable surface cleaning apparatus, such as a hand vacuum cleaner.INTRODUCTION

[0002] The following is not an admission that anything discussed below is part of the prior art or part of the common general knowledge of a person skilled in the art.

[0003] Various types of surface cleaning apparatus are known, including upright surface cleaning apparatus, canister surface cleaning apparatus, stick surface cleaning apparatus, central vacuum systems, and hand carriable surface cleaning apparatus such as hand vacuums. Further, various designs for cyclonic hand vacuum cleaners, including battery operated cyclonic hand vacuum cleaners, are known in the art.SUMMARY

[0004] This summary is intended to introduce the reader to the more detailed description that follows and not to limit or define any claimed or as yet unclaimed invention. One or more inventions may reside in any combination or sub-combination of the elements or process steps disclosed in any part of this document including its claims and figures.

[0005] In accordance with one aspect of this disclosure, which may be used alone or in combination with any other aspect, a hand vacuum cleaner has a hand vacuum cleaner axis that extending centrally through the hand vacuum cleaner between the front and rear ends of the hand vacuum cleaner. The hand vacuum cleaner includes a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber. The cyclone chamber has a cyclone axis of rotation which, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally. The front end of the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position, in which the hand vacuum cleaner is operable to clean a surface, and an open position, in which the cyclone chamber and optionally the dirt collection chamber are opened. The mount is provided between the mid-line of the height of the cyclone assembly and the top of the cyclone assembly.

[0006] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0007] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0008] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0009] (c) a handle,

[0010] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0011] wherein, when the hand vacuum cleaner is oriented with the dirty air inlet provided at an upper end of the hand vacuum cleaner and the hand vacuum cleaner axis is oriented horizontally, the hand vacuum cleaner has a lower end, the cyclone chamber has a lower end, an upper end and a mid-line positioned at an elevation equidistantly between a bottom of the cyclone chamber and a top of the cyclone chamber and the dirt collection chamber has a lower end, and

[0012] wherein a front end of the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position, in which the hand vacuum cleaner is operable to clean a surface, and an open position, in which the cyclone chamber and the dirt collection chamber are opened, and the mount is provided between the mid line and the top of the cyclone chamber.

[0013] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a hand vacuum cleaner includes a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber which, as discussed with respect to the previous embodiment, has a cyclone axis of rotation that extends generally transverse to the hand vacuum cleaner axis. In accordance with this aspect, at least a portion of the dirt collection chamber is positioned below the cyclone chamber and optionally the dirt outlet from the cyclone chamber may be in a lower portion of the cyclone chamber.

[0014] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0015] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0016] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0017] (c) a handle,

[0018] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0019] wherein, when the hand vacuum cleaner is oriented with the dirty air inlet provided at an upper end of the hand vacuum cleaner and the hand vacuum cleaner axis is oriented horizontally, the hand vacuum cleaner as a lower end, the cyclone chamber has a lower end, an upper end and a mid-line positioned at an elevation equidistantly between a bottom of the cyclone chamber and a top of the cyclone chamber, the dirt collection chamber has a lower end and at least a portion of the dirt collection chamber is positioned below the cyclone chamber.

[0020] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a hand vacuum cleaner includes a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber which, as discussed with respect to a previous embodiment, has a cyclone axis of rotation that extends generally transverse to the hand vacuum cleaner axis. In accordance with this aspect, one or more of the following may be provided:

[0021] (1) The cyclone assembly may have an openable portion that is moveable mounted to the cyclone assembly by a mount provided on the cyclone and optionally a transversely extending sidewall of the cyclone.

[0022] (2) The mount may be located at or rearward of the cyclone axis of rotation.

[0023] (3) A second separation stage comprising a second stage air treatment chamber (which may be non-cyclonic or cyclonic) and a second stage dirt collection region, which may be a second stage dirt collection region that is exterior to the second stage air treatment chamber, may be provided. The second stage dirt collection region may be concurrently openable with the first stage dirt collection region. Alternately, or in addition, the second separation stage may comprise one or more cyclones in parallel which have a cyclone axis of rotation that extends generally transverse to the hand vacuum cleaner axis.

[0024] (4) The cyclone assembly has a front wall and the front wall remains in position when the openable portion is opened.

[0025] (5) The cyclone assembly comprises a sweeping arm which moves through a portion of the first stage dirt collection chamber when the openable portion is opened.

[0026] (6) The cyclone assembly may have a second openable portion. One of the openable portions may be used to empty the cyclone assembly when the cyclone assembly (or hand vacuum cleaner) is docked at a docking station. The second openable portion may not be configured for mating with a docking station and may be operable by a user to empty the cyclone assembly without using a docking station. Accordingly, the first and second openable portions may be independently openable.

[0027] (7) A vortex finder may be provided on the end of a cyclone chamber opposed to the air outlet end of the cyclone chamber (e.g., on the end wall that is opposed to and faces the air outlet of the cyclone chamber).

[0028] (8) The cyclone chamber air inlet may be located midway between the axially opposed end walls of the cyclone chamber. Accordingly, the cyclone axis of rotation may intersect the first and second opposed end walls and the cyclone air outlet may be provided in the first end wall or a cyclone air outlet may be provided in each of the first and second opposed end walls.

[0029] (9) The hand vacuum cleaner may have a finger guard with an operating component of the hand vacuum cleaner in the finger guard, such as the motor and fan assembly or an energy storage member or members.

[0030] In any embodiment, the openable portion may include a portion of a wall of the first stage dirt collection chamber and / or a portion of the sidewall of the first stage cyclone chamber.

[0031] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0032] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0033] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage, the first cyclonic stage comprising a first stage cyclone chamber and a first stage dirt collection chamber exterior to the first stage cyclone chamber, the first stage cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the first stage dirt collection chamber and a cyclone axis of rotation; and,

[0034] (c) a handle,

[0035] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0036] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber, wherein the mount is provided on the sidewall of the first stage cyclone chamber, or

[0037] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0038] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber, wherein the mount is located at or rearward of the cyclone axis of rotation, or

[0039] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0040] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber, and

[0041] wherein the cyclone assembly has a front wall and the front wall remains in position when the openable portion is opened, or

[0042] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0043] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the first stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber, and

[0044] wherein the openable portion further comprises a sweeping arm when moves through a portion of the first stage dirt collection chamber when the openable portion is opened.

[0045] In accordance with this aspect, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0046] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0047] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage and a second cyclonic stage, the first cyclonic stage comprising a first stage cyclone chamber and a first stage dirt collection chamber exterior to the first stage cyclone chamber, the first stage cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the first stage dirt collection chamber and a cyclone axis of rotation, the second cyclonic stage comprising a second stage cyclone and a second stage dirt collection chamber; and,

[0048] (c) a handle,

[0049] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the first stage cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0050] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber, the first stage dirt collection chamber and the second stage dirt collection chamber are opened, the openable portion comprises a portion of a wall of the first stage dirt collection chamber and a portion of the sidewall of the first stage cyclone chamber.

[0051] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0052] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0053] (b) an air treatment assembly provided in the air flow path, the air treatment assembly comprising an air treatment chamber having an air treatment chamber air inlet, an air treatment chamber air outlet, an air treatment chamber axis extending between a first end wall and an axially opposed second end wall and a sidewall extending between the first and second end walls wherein, when the hand vacuum cleaner axis is oriented horizontally, the air treatment chamber axis rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, and wherein the air treatment chamber air outlet is provided in the first end wall; and,

[0054] (c) a handle,

[0055] wherein the air treatment chamber has a first openable portion and a second openable portion, each of the first and second openable portions are independently moveable by a mount between a closed position, in which the hand vacuum cleaner is operable to clean a surface, and an open position, in which the air treatment assembly is opened, and

[0056] wherein, when the hand vacuum cleaner is oriented with the dirty air inlet provided at an upper end of the hand vacuum cleaner and the hand vacuum cleaner axis is oriented horizontally, the hand vacuum cleaner has a lower end, the air treatment assembly has a lower end, an upper end and a mid-line positioned at an elevation equidistantly between a bottom of the air treatment assembly and a top of the air treatment assembly.

[0057] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0058] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0059] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0060] (c) a handle,

[0061] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0062] wherein the cyclone air outlet is provided in the first end wall, the second end wall is air impermeable and a vortex finder is provided on the second end wall.

[0063] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0064] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0065] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0066] (c) a handle,

[0067] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0068] wherein the cyclone air outlet is provided in the first end wall and the cyclone air inlet is located midway between the first and second ends.

[0069] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0070] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0071] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage and a second cyclonic stage, wherein the first cyclonic stage comprises a first stage cyclone chamber comprising a first stage cyclone air inlet, a first stage cyclone air outlet and a first stage cyclone axis of rotation, wherein the second cyclonic stage comprises at least one second stage cyclone chamber comprising a second stage cyclone air inlet, a second stage cyclone air outlet and a second stage cyclone axis of rotation, and wherein the first stage cyclone axis of rotation extends in a common direction with the second stage cyclone axis of rotation; and,

[0072] (c) a handle,

[0073] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls.

[0074] In accordance with this aspect of this disclosure, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0075] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0076] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber comprising a cyclone axis of rotation wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall, a cyclone sidewall extending transversely between the first and second end wall;

[0077] (c) a handle; and,

[0078] (d) a finger guard positioned forward of the handle, wherein the motor and fan assembly is at least partially located in the finger guard

[0079] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, an upright vacuum cleaner has a cyclone assembly which comprises one cyclone (or a plurality of cyclone chambers) having a cyclone axis of rotation that extends transverse to a forward / rearward axis extending centrally through the surface cleaning head and generally horizontally when the upright section is in the upright storage position. The cyclone assembly may have any design discussed herein. For example, the cyclone assembly may have one or more of the following:

[0080] (1) The cyclone chamber may have two axially opposed air outlets and / or a cyclone air inlet located at an axially located mid-point between the axially opposed end walls of the cyclone chamber.

[0081] (2) A pre-motor filter may be positioned below one or both of the cyclone chamber and a dirt collection chamber that is exterior to the cyclone chamber, and above the motor and fan assembly.

[0082] (3) The cyclone may have a plurality of cyclone air inlets. The cyclone air inlet may be at one axially opposed end of the cyclone chamber and a cyclone air outlet may be at the axially opposed end wall. Alternately, the cyclone air inlet may be located at a midpoint between the axially opposed end walls and a cyclone air outlet may be provided at each axially opposed ends.

[0083] In accordance with this aspect of this disclosure, there is provided an upright vacuum cleaner comprising:

[0084] (a) a surface cleaning head having a front end, a rear end, a lower side having a dirty air inlet, an upper side and first and second transversely opposed sides, each of the transversely opposed sides extending between the front and rear ends;

[0085] (b) an upright section moveably mounted to the surface cleaning head between an upright storage position and a rearwardly inclined floor cleaning position;

[0086] (c) an air flow path extending from the dirty air inlet to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0087] (d) a cyclone assembly provided on the upright section, the cyclone assembly comprising a cyclone chamber comprising a cyclone air inlet, a first end wall having a first cyclone air outlet, a transversely opposed second end wall having a second cyclone air outlet, a cyclone sidewall extending transversely between the first and second end walls and a transversely extending cyclone axis of rotation.

[0088] In accordance with another this of this disclosure, there is also provided an upright vacuum cleaner comprising:

[0089] (a) a surface cleaning head having a front end, a rear end, a lower side having a dirty air inlet, an upper side and first and second transversely opposed sides, each of the transversely opposed sides extending between the front and rear ends;

[0090] (b) an upright section moveably mounted to the surface cleaning head between an upright storage position and a rearwardly inclined floor cleaning position;

[0091] (c) an air flow path extending from the dirty air inlet to a clean air outlet with a motor and fan assembly provided in the air flow path, the motor and fan assembly is provided on the upright section;

[0092] (d) a cyclone assembly provided on the upright section, the cyclone assembly comprising a cyclone chamber comprising a cyclone air inlet, a first end wall having a first cyclone air outlet, a transversely opposed second end wall, a cyclone sidewall extending transversely between the first and second end walls, a transversely extending cyclone axis of rotation, and a dirt outlet that is in communication with a dirt collection chamber that is exterior to the cyclone chamber wherein, when the upright section is in the storage position, the dirt collection chamber is positioned below the cyclone chamber; and,

[0093] (e) a pre-motor filter cyclone assembly provided on the upright section wherein, when the upright section is in the storage position, the pre-motor filter is positioned below the dirt collection chamber and above the motor and fan assembly.

[0094] In accordance with this aspect, there is also provided a surface cleaning apparatus which, in use to clean a floor, has a front end, a rear end and a surface cleaning apparatus axis extending centrally between the front and rear ends, the surface cleaning apparatus comprising:

[0095] (a) an air flow path extending from a dirty air inlet, which is provided at the front end, to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0096] (b) a cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone axis of rotation, a plurality of cyclone air inlets, a first end wall having a first cyclone air outlet, an opposed second end wall, a cyclone sidewall extending between the first and second end walls, and a dirt outlet that is in communication with a dirt collection chamber that is exterior to the cyclone chamber wherein the cyclone axis of rotation extends transversely to the surface cleaning apparatus axis and wherein, when the surface cleaning apparatus is in use to clean a floor, the cyclone axis of rotation extends horizontally,

[0097] wherein an annular header extends around the cyclone sidewall and the plurality of cyclone air inlets extends from the annular header to the cyclone chamber.

[0098] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, an appliance such as a surface cleaning apparatus or an air filtration apparatus (e.g., an air cleaner), has a cyclone chamber with a plurality of air inlets wherein the air flow path to at least one of the air inlets includes a porous member, such as a screen, to limit the size of dirt particles what may travel through the air flow path to the air inlet. For example, a cyclone chamber may have a first air flow path extending to a first cyclone air inlet and a second flow path branching off of the first air flow path to a second cyclone air inlet and a screen may be provided adjacent the location at which the second air flow path branches off from the first air flow path. It will be appreciated that a third (or more) cyclone air inlet(s) may be provided any one or more of which may branch off of the first air flow path and / or the second air flow path and may include a porous member to further limit the size of dirt particles travelling to the third (or more) cyclone air inlet(s).

[0099] In accordance with this aspect, there is provided which, in use to clean a floor, has a front end, a rear end and a surface cleaning apparatus axis extending centrally between the front and rear ends, the surface cleaning apparatus comprising:

[0100] (a) an air flow path extending from a dirty air inlet, which is provided at the front end, to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0101] (b) a cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone axis of rotation, a cyclone air inlet, a first end wall having a first cyclone air outlet, an opposed second end wall, a cyclone sidewall extending between the first and second end walls,

[0102] wherein the cyclone air inlet comprises a first channel extending from a first channel inlet end to a first channel outlet end that is provided at a location at which air exits the first channel and enters the cyclone chamber, and a second channel extending from a second channel inlet end to a second channel outlet end that is provided at a location at which air exits the second channel and enters the cyclone chamber, wherein a porous member is provided between a portion of the first channel and a portion of second channel whereby, in operation some air travelling through the first channel passes through the porous member into the second channel.

[0103] In accordance with this aspect, there is also provided a surface cleaning apparatus which, in use to clean a floor, has a front end, a rear end and a surface cleaning apparatus axis extending centrally between the front and rear ends, the surface cleaning apparatus comprising:

[0104] (a) an air flow path extending from a dirty air inlet, which is provided at the front end, to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0105] (b) a cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone axis of rotation, a cyclone air inlet, a first end wall having a first cyclone air outlet, an opposed second end wall, a cyclone sidewall extending between the first and second end walls, wherein the cyclone air inlet comprises:

[0106] (i) an upstream portion that extends axially though the cyclone chamber;

[0107] (ii) a first channel extending from a first channel inlet end to a first channel outlet end that is provided at a location at which air exits the first channel and enters the cyclone chamber; and,

[0108] (iii) a second channel extending from a second channel inlet end to a second channel outlet end that is provided at a location at which air exits the second channel and enters the cyclone chamber,

[0109] wherein each of the first and second channels comprise a tangential air inlet that is located at an outlet end of the upstream portion, and

[0110] wherein the second channel inlet end comprises a porous member whereby, in operation some air travelling through the cyclone air inlet passes through the porous member into the second channel.

[0111] In accordance with this aspect, there is also provided a surface cleaning apparatus which, in use to clean a floor, has a front end, a rear end and a surface cleaning apparatus axis extending centrally between the front and rear ends, the surface cleaning apparatus comprising:

[0112] (a) an air flow path extending from a dirty air inlet, which is provided at the front end, to a clean air outlet with a motor and fan assembly provided in the air flow path; and,

[0113] (b) a cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone axis of rotation, a cyclone air inlet, a first end wall having a first cyclone air outlet, an opposed second end wall, a cyclone sidewall extending between the first and second end walls,

[0114] wherein the cyclone air inlet comprises a first channel extending from a first channel inlet end to a first channel outlet end that is provided at a location at which air exits the first channel and enters the cyclone chamber, and a porous section of the cyclone sidewall whereby, in operation some air travelling through the cyclone air inlet passes through the porous member into the cyclone chamber

[0115] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus, such as a hand vacuum cleaner, comprises a first cyclonic stage comprising one or more first stage cyclones in parallel and a second cyclonic stage downstream from the first cyclonic stage wherein the second cyclonic stage comprises one or more second stage cyclones in parallel and the cyclone axis of rotation of the second stage cyclone(s) extends generally perpendicular to the cyclone axis of rotation of the first stage cyclone(s). Accordingly, for example, a hand vacuum cleaner may have a first stage cyclone having a cyclone axis of rotation that extends generally vertically when the hand vacuum cleaner inlet conduit extends horizontally and the cyclone axis of rotation of the second stage cyclone(s) may extend generally transverse or generally horizontally.

[0116] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0117] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0118] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage and a second cyclonic stage, wherein the first cyclonic stage comprises a first stage cyclone chamber comprising a first stage cyclone air inlet, a first stage cyclone air outlet, a first stage cyclone axis of rotation extending between first and second end walls and a cyclone sidewall extends between the first and second end walls, wherein the second cyclonic stage comprises at least one second stage cyclone chamber comprising a second stage cyclone air inlet, a second stage cyclone air outlet and a second stage cyclone axis of rotation; and,

[0119] (c) a handle,

[0120] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally vertically and the second stage cyclone axis of rotation is oriented generally horizontally and extends in a common direction with the hand vacuum cleaner axis.

[0121] In accordance with this aspect, there is also provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0122] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0123] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage and a second cyclonic stage, wherein the first cyclonic stage comprises a first stage cyclone chamber comprising a first stage cyclone air inlet, a first stage cyclone air outlet, a first stage cyclone axis of rotation extending between first and second end walls and a cyclone sidewall extends between the first and second end walls, wherein the second cyclonic stage comprises at least one second stage cyclone chamber comprising a second stage cyclone air inlet, a second stage cyclone air outlet and a second stage cyclone axis of rotation; and,

[0124] (c) a handle,

[0125] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally vertically and the second stage cyclone axis of rotation is oriented generally horizontally and extends in a direction transverse to the hand vacuum cleaner axis, or

[0126] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally vertically and the second stage cyclone axis of rotation is oriented generally horizontally and extends in a direction transverse to the hand vacuum cleaner axis, or

[0127] wherein, when the hand vacuum cleaner axis is oriented horizontally, the first stage cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0128] wherein the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position in which the hand vacuum cleaner is operable to clean a surface, and an open position in which the first stage cyclone chamber and the second stage dirt collection chamber are opened.

[0129] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus, such as a hand vacuum cleaner, has two or more first stage cyclones in parallel wherein each of the first stage cyclones has a cyclone axis of rotation that extends generally transversely. The first stage cyclone may be positioned one partially or fully above the other (e.g., vertically stacked) and / or one partially or fully rearward of the other.

[0130] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0131] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0132] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first cyclonic stage comprising two first stage cyclone chambers, each first stage cyclone chamber comprising a first stage cyclone air inlet, a first stage cyclone air outlet, a first stage cyclone axis of rotation extending between first and second end walls and a cyclone sidewall extends between the first and second end walls; and,

[0133] (c) a handle,

[0134] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axes of rotation are oriented generally horizontally and extend generally transverse to the hand vacuum cleaner axis

[0135] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a cyclone for a surface cleaning apparatus has an air flow channel that extends downstream from the cyclone air outlet wherein the cross-sectional area in a direction transverse to the direction of flow through the air flow channel increases in the downstream direction. This increase in cross-sectional area may be provided by the cyclone chamber (which comprises an inner wall of the air flow channel) decreasing in diameter in the downstream direction and / or an outer wall of the surface cleaning apparatus (which comprises an outer wall of the air flow channel) increasing in diameter in the downstream direction.

[0136] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0137] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0138] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a first stage cyclone chamber, the first stage cyclone chamber comprising a first end wall, an opposed second end wall, a cyclone axis of rotation extending between the first and second end walls, a cyclone sidewall extending between the first and second end walls, a cyclone air inlet and a first cyclone air outlet provided in the first end wall;

[0139] (c) a first air flow passage that extends rearwardly from the first stage cyclone air outlet wherein, in operation, air travels in a first direction of flow through the first air flow passage, the first air flow passage has a first cross-sectional flow area in a plane transverse to the first direction of flow and the first cross-sectional flow area increases in the downstream direction; and,

[0140] (d) a handle,

[0141] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner

[0142] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus which is dockable with a docking station, such as wherein the air treatment assembly is dockable with a docking station while the air treatment assembly is attached as part of the surface cleaning apparatus or when the air treatment assembly has been removed from the surface cleaning apparatus, has two or more openable portions (e.g., doors) that are openable to enable dirt to be transferred from the air treatment assembly to the docking station. Each openable portion may open concurrently and may be concurrently unlocked when docked at the docking station. For example, a single abutment member may engage a drive member that is drivingly connected to the locking mechanism for each openable portion. Alternately, each locking mechanism may be engaged by a different abutment member provided on the docking station. It will be appreciated that that docking station may have a single inlet to which each of the openable portions mate when docked or each openable portion may mate with a different inlet of the docking station.

[0143] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0144] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path, wherein the dirty air inlet comprises an inlet conduit that extends rearwardly;

[0145] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet and a cyclone axis of rotation; and,

[0146] (c) a handle,

[0147] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall and a cyclone sidewall extending transversely between the first and second end walls, and

[0148] wherein the dirty air inlet is provided midway between the first and second end walls, and

[0149] wherein the cyclone assembly has first and second openable portions.

[0150] In accordance with this aspect, there is provided also a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0151] (a) an air flow path extending from a dirty air inlet provided at the front end of the surface cleaning apparatus to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0152] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a second cyclone air outlet and a cyclone axis of rotation; and,

[0153] (c) a handle,

[0154] wherein the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall and a cyclone sidewall extending between the first and second end walls, wherein the first cyclone air outlet is provided in the first end wall and the second cyclone air outlet is provided in the second end wall, and wherein the cyclone air inlet is provided in the cyclone sidewall midway between the first and second end walls,

[0155] wherein the cyclone assembly has first and second openable portions

[0156] In accordance with this aspect, there is provided also a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0157] (a) an air flow path extending from a dirty air inlet provided at the front end of the surface cleaning apparatus to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;

[0158] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet and a cyclone axis of rotation that extends generally transverse to the surface cleaning apparatus axis; and,

[0159] (c) a handle,

[0160] wherein the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall and a cyclone sidewall extending between the first and second end walls, wherein the first cyclone air outlet is provided in the first end wall, and wherein the cyclone air inlet is provided in the cyclone sidewall midway between the first and second end walls, and

[0161] wherein the cyclone assembly has first and second openable portions

[0162] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus which is dockable with a docking station, such as wherein the air treatment assembly is dockable with a docking station while the air treatment assembly is attached as part of the surface cleaning apparatus or when the air treatment assembly has been removed from the surface cleaning apparatus, has a recess provided in the dirt collection region (e.g., a dirt collection chamber that is exterior to an air treatment chamber such as a cyclone chamber) through which dirt travels during an emptying mode of operation as it travels to the air treatment member of a docking station. It will be appreciated that the dirt may travel through a passage that is located in the recess that is part of the surface cleaning apparatus or which is part of the docking station.

[0163] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0164] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path, wherein the dirty air inlet comprises an inlet conduit that extends rearwardly;

[0165] (b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,

[0166] (c) a handle,

[0167] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall, a cyclone sidewall extending transversely between the first and second end walls, and

[0168] wherein a portion of the dirt collection chamber is positioned forward of the cyclone chamber and the cyclone air inlet extends rearward past the portion of the dirt collection chamber to the cyclone air inlet.

[0169] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a docking station for a surface cleaning apparatus having a cyclone chamber with a cyclone axis of rotation that extends transversely as discussed previously, has an inlet wherein the longer dimension of the inlet extends transversely (e.g., generally horizontally and perpendicular to an axis extending centrally through a docking station from the front of the docking station to the rear of the docking station. Accordingly, the inlet may be generally rectangular with the long dimension of the inlet extending transversely.

[0170] In accordance with this aspect, there is provided an assembly comprising a hand vacuum cleaner and a docking station for the hand vacuum cleaner:

[0171] (a) the hand vacuum cleaner comprising having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0172] (i) a hand vacuum cleaner air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path, wherein the dirty air inlet is provided at an upper end of the hand vacuum cleaner;

[0173] (ii) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a front end having an openable front wall and a cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet and a cyclone axis of rotation; and,

[0174] (iii) a handle,

[0175] (b) the docking station comprising a docking station air flow path from a docking station air inlet to a docking station air outlet with an air treatment member provided in the docking station air flow path,

[0176] wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis, the cyclone chamber comprises a first end having a first end wall, an opposed second end having a second end wall, a cyclone sidewall extending transversely between the first and second end walls, and

[0177] wherein the hand vacuum cleaner has first and second transversely opposed sides, and a transverse length between the first and second transversely opposed sides, and

[0178] wherein, when the hand vacuum cleaner is docked at the docking station, the upper end of the hand vacuum cleaner faces forwardly, the front end of the hand vacuum cleaner seats on the docking station air inlet and the docking station has a transverse width, in a direction of the cyclone axis of rotation, that is essentially the same as the transverse length of the hand vacuum cleaner.

[0179] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a surface cleaning apparatus, such as a hand vacuum cleaner, may have two or more user interfaces. Each user interface may display the same information and / or provide the same control actuators. Alternately, each interface may display different information and / or have control actuators that are operable to control different operations of the surface cleaning apparatus. Alternately, some of the user interfaces may display some different information and some of the same information and / or have control actuators that are operable to control different operations of the surface cleaning apparatus and also some of the same operations of the surface cleaning apparatus. The user interfaces may be provided at various locations such as one or more may be provided on the handle, the battery pack, the main body and the air treatment assembly.

[0180] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end, an upper end, a lower end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0181] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet;

[0182] (b) an air treatment assembly provided in the air flow path;

[0183] (c) a motor and fan assembly provided in the air flow path;

[0184] (d) a handle having a hand grip portion;

[0185] (e) a first user interface provided on the upper end of the hand vacuum cleaner; and,

[0186] (f) a second user interface provided on a rear side of the handle.

[0187] In accordance with another aspect of this disclosure, which may be used alone or in combination with any other aspect, a hand vacuum cleaner may have a plurality of energy storage members, such as batteries or capacitors, which may be provided in an energy storage pack, such as a battery pack and which may be removable, wherein some or all of the energy storage members have a long dimension which extends transverse to the axis of the hand vacuum cleaner inlet conduit and in the same plane as the axis of the hand vacuum cleaner inlet conduit and others may have a long dimension that extends in a different direction, e.g., vertically when the axis of the inlet conduit extends horizontally or horizontally when the axis of the inlet conduit extends horizontally.

[0188] In accordance with this aspect, there is provided a hand vacuum cleaner having a front end, a rear end, an upper end, a lower end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:

[0189] (a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet;

[0190] (b) an air treatment assembly provided in the air flow path;

[0191] (c) a motor and fan assembly provided in the air flow path;

[0192] (d) a handle having a hand grip portion; and,

[0193] (e) in operation, a battery pack, the battery pack housing a first set of batteries and a second set of batteries, the first set of batteries comprising at least one first battery having a first long axis and the second set of batteries comprising at least one second battery having a second long axis, wherein the first and second long axes extend at a non-zero angle to each other

[0194] These and other aspects and features of various embodiments will be described in greater detail below.BRIEF DESCRIPTION OF THE DRAWINGS

[0195] For a better understanding of the described embodiments and to show more clearly how they may be carried into effect, reference will now be made, by way of example, to the accompanying drawings in which:

[0196] FIG. 1 is a perspective view of an example hand vacuum, in accordance with an embodiment;

[0197] FIG. 2 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2;

[0198] FIG. 3 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3;

[0199] FIG. 4 is a perspective cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3;

[0200] FIG. 5 is a perspective view of the hand vacuum of FIG. 1 attached to a wand;

[0201] FIG. 6 is a perspective view of the hand vacuum of FIG. 1 attached to the wand and a surface cleaning head;

[0202] FIG. 7 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an example lower air inlet cyclone chamber;

[0203] FIG. 8 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an example multi-air inlet cyclone chamber;

[0204] FIG. 9 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example multi-air inlet cyclone chamber;

[0205] FIG. 10 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example multi-air inlet cyclone chamber;

[0206] FIG. 11 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example multi-air inlet cyclone chamber;

[0207] FIG. 12 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example multi-air inlet cyclone chamber;

[0208] FIG. 13A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an example bypass air inlet cyclone chamber;

[0209] FIG. 13B is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example bypass air inlet cyclone chamber;

[0210] FIG. 14 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having cyclone chamber with a flat rear end;

[0211] FIG. 15A is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a dirt collection chamber below the cyclone chamber and in a closed position;

[0212] FIG. 15B is a perspective side cross-sectional view of the hand vacuum of FIG. 15A with the dirt collection chamber in an open position;

[0213] FIG. 16A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a dirt collection chamber forward of the cyclone chamber and in a closed position;

[0214] FIG. 16B is a side cross-sectional view of the hand vacuum of FIG. 16A with the dirt collection chamber in an open position;

[0215] FIG. 17 is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a first rotationally mounted door in an open position;

[0216] FIG. 18A is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a second rotationally mounted door in an open position;

[0217] FIG. 18B is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an alternate second rotationally mounted door in an open position;

[0218] FIG. 18C is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another alternate second rotationally mounted door;

[0219] FIG. 19 is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a third rotationally mounted door;

[0220] FIG. 20A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having first and second rotationally mounted doors in a closed position;

[0221] FIG. 20B is a side cross-sectional view of the hand vacuum of FIG. 20A when docked at a docking station and with the first and second rotationally mounted doors in an open position;

[0222] FIG. 20C is a side cross-sectional view of an alternate version of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having first and second rotationally mounted doors in a closed position;

[0223] FIG. 20D is a side cross-sectional view of the hand vacuum of FIG. 20C when docked at a docking station and with the first and second rotationally mounted doors in an open position;

[0224] FIG. 21A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having first and second translatably mounted doors in an open position;

[0225] FIG. 21B is a side cross-sectional view of the hand vacuum of FIG. 21A with the second translatably mounted door in the open position;

[0226] FIG. 22 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having an example uniflow cyclone chamber;

[0227] FIG. 23 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having an example inverted cyclone chamber;

[0228] FIG. 24 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having an example split flow cyclone chamber with dual air outlets;

[0229] FIG. 25 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having another example split flow cyclone chamber;

[0230] FIG. 26 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having another example split flow cyclone chamber;

[0231] FIG. 27 is a partial top cross-sectional view of the hand vacuum of FIG. 1 taken along line 3-3, with the hand vacuum having an example hybrid cyclone chamber;

[0232] FIG. 28 is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having an example second cleaning stage;

[0233] FIG. 29A is a perspective side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having another example second cleaning stage;

[0234] FIG. 29B is a front cross-sectional view of the hand vacuum of FIG. 1 taken along line 29-29, with the hand vacuum having the example second cleaning stage of FIG. 28A;

[0235] FIG. 30 is a front cross-sectional view of the hand vacuum of FIG. 1 taken along line 30-30, with the hand vacuum having another example second cleaning stage;

[0236] FIG. 31 is a front cross-sectional view of the hand vacuum of FIG. 1 taken along line 30-30, with the hand vacuum having another example second cleaning stage;

[0237] FIG. 32 is a side perspective view of another example hand vacuum cleaner, in accordance with an embodiment;

[0238] FIG. 33A is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 33-33, with the hand vacuum having a rotationally mounted door in an open position;

[0239] FIG. 33B is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 33-33, with the hand vacuum having another rotationally mounted door in an open position;

[0240] FIG. 34 is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 34-34, with the hand vacuum having a trapezoidal cyclone chamber;

[0241] FIG. 35A is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 34-34, with the hand vacuum having two motors;

[0242] FIG. 35B is a perspective cross-sectional view of the hand vacuum of FIG. 32 taken along line 34-34, with the hand vacuum having two fans;

[0243] FIG. 36 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the hand vacuum having a pre-motor filter below the cyclone chamber;

[0244] FIG. 37 is a perspective rear cross-sectional view of the hand vacuum of FIG. 1 taken along line 37-37, with the hand vacuum having a pre-motor filter below the cyclone chamber;

[0245] FIGS. 38-47 are side cross-sectional views of the hand vacuum of FIG. 1 taken along line 2-2, showing various layouts of the pre-motor filter, suction motor, energy storage member(s), post-motor filter, and handle;

[0246] FIG. 48 is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 2-2, with the cyclone chamber having a variable radius;

[0247] FIG. 49A is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 30-30, with the variable radius cyclone chamber being bowtie-shaped;

[0248] FIG. 49B is a side cross-sectional view of the hand vacuum of FIG. 1 taken along line 30-30, with the variable radius cyclone chamber being frusto-conical;

[0249] FIG. 50 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0250] FIG. 51 is a front cross-sectional view of the hand vacuum of FIG. 50 taken along line 51-51;

[0251] FIG. 52 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a first rotationally mounted door in an open position;

[0252] FIG. 53 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a second rotationally mounted door in an open position;

[0253] FIG. 54 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0254] FIG. 55 is a side cross-sectional view of the hand vacuum of FIG. 54 taken along line 55-55;

[0255] FIG. 56 is a top cross-sectional view of the hand vacuum of FIG. 54 taken along line 56-56;

[0256] FIG. 57 is a perspective side cross-sectional view of the hand vacuum of FIG. 54 taken along line 55-55, with the hand vacuum having a first rotationally mounted door in an open position;

[0257] FIG. 58 is a perspective side cross-sectional view of the hand vacuum of FIG. 54 taken along line 55-55, with the hand vacuum having a second rotationally mounted door in an open position;

[0258] FIG. 59 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0259] FIG. 60 is a side cross-sectional view of the hand vacuum of FIG. 59 taken along line 60-60;

[0260] FIG. 61 is a top cross-sectional view of the hand vacuum of FIG. 59 taken along line 61-61;

[0261] line 62-62;

[0262] FIG. 62 is a top cross-sectional view of the hand vacuum of FIG. 59 taken along

[0263] FIG. 63 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0264] FIG. 64 is a side cross-sectional view of the hand vacuum of FIG. 63 taken along line 64-64;

[0265] FIG. 65 is a partial top cross-sectional view of the hand vacuum of FIG. 63 taken along line 65-65;

[0266] FIG. 66 is a front cross-sectional view of the hand vacuum of FIG. 50 taken along line 66-66;

[0267] FIG. 67 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a first rotationally mounted door in an open position;

[0268] FIG. 68 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a second rotationally mounted door in an open position;

[0269] FIG. 69 is a perspective side cross-sectional view of the hand vacuum of FIG. 50 taken along line 52-52, with the hand vacuum having a third rotationally mounted door in an open position;

[0270] FIG. 70 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0271] FIG. 71 is a front cross-sectional view of the hand vacuum of FIG. 70 taken along line 71-71;

[0272] FIG. 72 is a side cross-sectional view of the hand vacuum of FIG. 70 taken along line 72-72;

[0273] FIG. 73 is a perspective side cross-sectional view of the hand vacuum of FIG. 70 taken along line 72-72, with the hand vacuum having a rotationally mounted door in an open position;

[0274] FIG. 74 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0275] FIG. 75 is a perspective side cross-sectional view of the hand vacuum of FIG. 74 taken along line 75-75, with the hand vacuum having a rotationally mounted door in an open position;

[0276] FIG. 76 is a top cross-sectional view of the hand vacuum of FIG. 74 taken along line 76-76;

[0277] FIG. 77A is a front cross-sectional view of the hand vacuum of FIG. 74 taken along line 77-77, with the hand vacuum having a first bypass air inlet configuration;

[0278] FIG. 77B is a front cross-sectional view of the hand vacuum of FIG. 74 taken along line 77-77, with the hand vacuum having another bypass air inlet configuration;

[0279] FIG. 78 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0280] FIG. 79 is a perspective side cross-sectional view of the hand vacuum of FIG. 78 taken along line 79-79;

[0281] FIG. 80 is a top cross-sectional view of the hand vacuum of FIG. 79 taken along line 80-80 in FIG. 78;

[0282] FIG. 81 is a perspective side cross-sectional view of the hand vacuum of FIG. 78 taken along line 79-79, with the hand vacuum having a rotationally mounted door in an open position;

[0283] FIG. 82 is a top cross-sectional view of the hand vacuum of FIG. 81 taken along line 80-80 in FIG. 78;

[0284] FIG. 83 is a side perspective view of the hand vacuum of FIG. 1 docked to a docking station;

[0285] FIG. 84 is a perspective side cross-sectional view taken along line 84-84 in FIG. 83, with the wand and surface cleaning head omitted;

[0286] FIG. 85 is a perspective view of the hand vacuum of FIG. 1 positioned above the docking station inlet;

[0287] FIG. 86A is a side cross-sectional view of the hand vacuum of FIG. 1 docking to another docking station;

[0288] FIG. 86B is a side cross-sectional view of the hand vacuum of FIG. 1 docked to the docking station of FIG. 86A;

[0289] FIG. 87 is a front cross-sectional view of the hand vacuum of FIG. 1 docked to the docking station of FIG. 86A;

[0290] FIG. 88 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0291] FIG. 89 is a side cross-sectional view of the hand vacuum of FIG. 88 taken along line 89-89, with the hand vacuum docked to a docking station;

[0292] FIG. 90 is a side cross-sectional view of the hand vacuum of FIG. 88 taken along line 90-90, with the hand vacuum docked to the docking station;

[0293] FIG. 91 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0294] FIG. 92 is a partial side cross-sectional view of the hand vacuum of FIG. 91 taken along line 92-92, with a first rotationally mounted door in an open position;

[0295] FIG. 93 is a side cross-sectional view of the hand vacuum of FIG. 91 taken along line 92-92, with a second rotationally mounted door in an open position and docked to a docking station;

[0296] FIG. 94 is a side cross-sectional view of the hand vacuum of FIG. 91 taken along line 94-94, with a third rotationally mounted door in an open position and docked to the docking station;

[0297] FIG. 95 is a front perspective view of an example upright vacuum, in accordance with an embodiment;

[0298] FIG. 96 is a rear perspective view of the upright vacuum of FIG. 95;

[0299] FIG. 97 is a side perspective view of the upright vacuum of FIG. 95, with an air treatment assembly removed for emptying;

[0300] FIG. 98 is a side cross-sectional view of the upright vacuum of FIG. 95 taken along line 98-98;

[0301] FIG. 99 is a perspective side cross-sectional view of the upright vacuum of FIG. 95 taken along line 98-98, with the air treatment assembly removed;

[0302] FIG. 100 is a front perspective view of another example upright vacuum, in accordance with an embodiment;

[0303] FIG. 101 is a rear perspective view of the upright vacuum of FIG. 100;

[0304] FIG. 102 is a side perspective view of the upright vacuum of FIG. 100, with an air treatment assembly removed for emptying;

[0305] FIG. 103 is a side cross-sectional view of the upright vacuum of FIG. 100 taken along line 103-103;

[0306] FIG. 104 is a perspective side cross-sectional view of the upright vacuum of FIG. 100 taken along line 103-103, with the air treatment assembly removed;

[0307] FIG. 105 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0308] FIG. 106 is a perspective side cross-sectional view of the hand vacuum of FIG. 105 taken along line 106-106, with the hand vacuum having dual first stage cyclone chambers;

[0309] FIG. 107 is a perspective side cross-sectional view of the hand vacuum of FIG. 105 taken along line 106-106, with first and second rotationally mounted doors in an open position;

[0310] FIG. 108 is a front perspective view of another example upright vacuum, in accordance with an embodiment;

[0311] FIG. 109 is an enlarged perspective side cross-sectional view of the upright vacuum of FIG. 108 taken along line 109-109;

[0312] FIG. 110 is a side cross-sectional view of the upright vacuum of FIG. 108 taken along line 109-109, with an air treatment assembly removed;

[0313] FIG. 111 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0314] FIG. 112 is a front cross-sectional view of the hand vacuum of FIG. 111 taken along line 112-112;

[0315] FIG. 113A is a side cross-sectional view of the hand vacuum of FIG. 111 taken along line 113-113, with a rotationally mounted door in an open position;

[0316] FIG. 113B is a side cross-sectional view of the hand vacuum of FIG. 111 taken along line 113-113, with another rotationally mounted door in an open position;

[0317] FIG. 114 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0318] FIG. 115 is a front cross-sectional view of the hand vacuum of FIG. 114 taken along line 115-115;

[0319] FIG. 116 is a partial perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having a first rotationally mounted door in an open position;

[0320] FIG. 117A is a perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having a second rotationally mounted door in an open position;

[0321] FIG. 117B is a perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having a third rotationally mounted door in an open position;

[0322] FIG. 118 is a side view of another example hand vacuum, in accordance with an embodiment;

[0323] FIG. 119 is a side cross-sectional view of the hand vacuum of FIG. 118;

[0324] FIG. 120 is a side cross-sectional view of the hand vacuum of FIG. 118, with first and second rotationally mounted doors in an open position;

[0325] FIG. 121 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having an alternate rotationally mounted door in a closed position;

[0326] FIG. 122 is a front cross-sectional view of the hand vacuum of FIG. 121 taken along line 122-122 of FIG. 118;

[0327] FIG. 123 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having the alternate rotationally mounted door in an open position;

[0328] FIG. 124 is a front cross-sectional view of the hand vacuum of FIG. 123 taken along line 122-122 of FIG. 118;

[0329] FIG. 125 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having an alternate main body;

[0330] FIG. 126 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having another alternate rotationally mounted door in an open position;

[0331] FIG. 127 is an exploded partial side cross-sectional view of the air treatment assembly of the hand vacuum of FIG. 126;

[0332] FIG. 128 is a front cross-sectional view of the hand vacuum of FIG. 126 taken along line 122-122 of FIG. 118, with the alternate rotationally mounted door in a closed position;

[0333] FIG. 129 is a front cross-sectional view of the hand vacuum of FIG. 126 taken along line 122-122 of FIG. 118, with the alternate rotationally mounted door in the open position;

[0334] FIG. 130 is a side cross-sectional view of the hand vacuum of FIG. 118, with the hand vacuum having alternate first and second rotationally mounted doors in an open position;

[0335] FIG. 131 is an enlarged partial side cross-sectional view of the air treatment assembly of the hand vacuum of FIG. 130;

[0336] FIG. 132 is a perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having first and second rotationally mounted doors in an open position;

[0337] FIG. 133 is a front cross-sectional view of the hand vacuum of FIG. 114 taken along line 115-115;

[0338] FIG. 134 is a partial perspective side cross-sectional view of the hand vacuum of FIG. 114 taken along line 116-116, with the hand vacuum having a third rotationally mounted door in an open position;

[0339] FIG. 135 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0340] FIG. 136 is a perspective side cross-sectional view of the hand vacuum of FIG. 135 taken along line 136-136, with the hand vacuum having dual first stage cyclone chambers;

[0341] FIG. 137 is a perspective view of another example hand vacuum, in accordance with an embodiment;

[0342] FIG. 138 is a side cross-sectional view of the hand vacuum of FIG. 137 taken along line 138-138, with the hand vacuum docked to a docking station;

[0343] FIG. 139 is a side cross-sectional view of the hand vacuum of FIG. 137 taken along line 139-139, with the hand vacuum docked to the docking station;

[0344] FIG. 140 is a perspective view of another example hand vacuum, in accordance with an embodiment, docking to a docking station;

[0345] FIG. 141 is a side cross-sectional view of the hand vacuum of FIG. 140 taken along line 141-141, with the hand vacuum docked to the docking station;

[0346] FIG. 142 is a side cross-sectional view of the hand vacuum of FIG. 140 taken along line 141-141;

[0347] FIG. 143 is a side cross-sectional view of the hand vacuum of FIG. 140 taken along line 141-141, with the hand vacuum having a rotationally mounted door in an open position;

[0348] FIG. 144 is a side cross-sectional view of an alternate version of the hand vacuum of FIG. 140 taken along line 141-141, with the hand vacuum having a first rotationally mounted door in an open position; and,

[0349] FIG. 145 is a side cross-sectional view of the alternate version of the hand vacuum of FIG. 144 taken along line 141-141 in FIG. 140, with the hand vacuum having the first rotationally mounted door and a second rotationally mounted door in an open position.US_DESCRIPTION_OF_EMBODIMENTS

[0350] The drawings included herewith are for illustrating various examples of articles, methods, and apparatuses of the teaching of the present specification and are not intended to limit the scope of what is taught in any way.DESCRIPTION OF VARIOUS EMBODIMENTS

[0351] Various apparatus, methods and compositions are described below to provide an example of an embodiment of each claimed invention. No embodiment described below limits any claimed invention and any claimed invention may cover apparatuses and methods that differ from those described below. The claimed inventions are not limited to apparatus, methods and compositions having all of the features of any one apparatus, method or composition described below or to features common to multiple or all of the apparatus, methods or compositions described below. It is possible that an apparatus, method or composition described below is not an embodiment of any claimed invention. Any invention disclosed in an apparatus, method or composition described below that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicant(s), inventor(s) and / or owner(s) do not intend to abandon, disclaim, or dedicate to the public any such invention by its disclosure in this document.

[0352] The terms “an embodiment”, “embodiment”, “embodiments”, “the embodiment”, “the embodiments”, “one or more embodiments,”“some embodiments”, and “one embodiment” mean “one or more (but not all) embodiments of the present invention(s)”, unless expressly specified otherwise.

[0353] The terms “including”, “comprising”, and variations thereof mean “including but not limited to”, unless expressly specified otherwise. A listing of items does not imply that any or all of the items are mutually exclusive, unless expressly specified otherwise. The terms “a”, “an”, and “the” mean “one or more”, unless expressly specified otherwise.

[0354] As used herein and in the claims, two or more parts are said to be “coupled”, “connected”, “attached”, or “fastened” where the parts are joined or operate together either directly or indirectly (i.e., through one or more intermediate parts), so long as a link occurs. As used herein and in the claims, two or more parts are said to be “directly coupled”, “directly connected”, “directly attached”, or “directly fastened” where the parts are connected in physical contact with each other. None of the terms “coupled”, “connected”, “attached”, and “fastened” distinguish the manner in which two or more parts are joined together.

[0355] Furthermore, it will be appreciated that for simplicity and clarity of illustration, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the example embodiments described herein. However, it will be understood by those of ordinary skill in the art that the example embodiments described herein may be practiced without these specific details. In other instances, well-known methods, procedures, and components have not been described in detail so as not to obscure the example embodiments described herein. Also, the description is not to be considered as limiting the scope of the example embodiments described herein.

[0356] As used herein, the wording “and / or” is intended to represent an inclusive-or. That is, “X and / or Y” is intended to mean X or Y or both, for example. As a further example, “X, Y, and / or Z” is intended to mean X or Y or Z or any combination thereof.

[0357] As used herein and in the claims, two elements are said to be “parallel” where those elements are parallel and spaced apart, or where those elements are collinear.

[0358] Some elements herein may be identified by a part number, which is composed of a base number followed by an alphabetical or subscript-numerical suffix (e.g., 300a, or 3001). Multiple elements herein may be identified by part numbers that share a base number in common and that differ by their suffixes (e.g., 3001, 3002, and 3003). All elements with a common base number may be referred to collectively or generically using the base number without a suffix (e.g., 300).

[0359] It should be noted that terms of degree such as “substantially”, “about”, and “approximately” as used herein mean a reasonable amount of deviation of the modified term such that the end result is not significantly changed. These terms of degree may also be construed as including a deviation of the modified term, such as by 1%, 2%, 5% or 10%, for example, if this deviation does not negate the meaning of the term it modifies. For example, the expressions “substantially perpendicular” and “substantially parallel” mean within 10% of perpendicular and parallel, respectively.General Description

[0360] The following is a general description intended to provide a basis for understanding several of the features that are discussed herein. As discussed in detail subsequently, each of the features may be used alone, or in combination, in any embodiment such as the exemplary embodiments described herein.General Description of a Hand Vacuum Cleaner

[0361] FIGS. 1 to 4 show an example embodiment of a surface cleaning apparatus 100. In the illustrated embodiment, the surface cleaning apparatus 100 is a hand-held vacuum cleaner, which is commonly referred to as a “hand vacuum cleaner” or a “handvac”. As used herein, a hand-held vacuum cleaner or hand vacuum cleaner or handvac is a vacuum cleaner that can be operated generally one-handedly to clean a surface while its weight is held by the same one hand. This is contrasted with upright and canister vacuum cleaners, the weight of which is supported by a surface (e.g., floor below) during use. As described subsequently herein, the principles and features applied to the various example hand vacuum embodiments described herein may also be applied to other vacuum types, such as upright and canister vacuum cleaners (see e.g., FIGS. 95, 100, and 108).

[0362] Optionally, the hand vacuum 100 can be mountable on a base so as to form, for example, an upright vacuum cleaner, a canister vacuum cleaner, a stick vac, a wet-dry vacuum cleaner and the like. The hand vacuum 100 can be either removably or permanently mounted to the base. For example, referring briefly to the example shown in FIGS. 5 and 6, the hand vacuum 100 is removably mounted to a base 102, forming a stick vac. As shown, the base 102 includes an elongated rigid wand 104 and a surface cleaning head 106.

[0363] Referring again to FIGS. 1 to 4, in the illustrated embodiment, the hand vacuum 100 has a front end 108, a rear end 110, an upper end 112, a lower end 114, and a hand vacuum axis 116 extending centrally through the hand vacuum 100 between the front and rear ends 108, 110. As used with respect to the hand vacuum axis 116, “centrally” as exemplified is generally centered between the upper and lower ends 112, 114, generally centered between lateral sides of the hand vacuum 100, or both.

[0364] The hand vacuum 100 may include a main body 118. The main body 118 may have a main body housing 120 and a handle 122 connected to the main body housing 118.

[0365] The hand vacuum 100 may further include an air treatment assembly 124 connected to the main body 118 (e.g., permanently or removably). The air treatment assembly 124 may have at least one cleaning stage 126. Each cleaning stage 126 may have an air treatment chamber 128, wherein a dirt collection region 130 may be provided internal to the air treatment chamber 128, and / or a dirt collection chamber 132 external to the air treatment chamber 128.

[0366] The hand vacuum 100 may further include a dirty air inlet 134, a clean air outlet 136 rearward of the dirty air inlet 134, an airflow path 138 extending between the dirty air inlet 134 and clean air outlet 136, and a motor and a fan assembly, which may be a suction motor 140 as exemplified to generate vacuum suction through the airflow path 138 (see e.g., example airflow path in FIGS. 2 and 3). The suction motor 140 may be positioned in the main body 118 within a motor housing 142, which may be integrally formed as part of the main body housing 120 and / or handle 122.

[0367] The hand vacuum 100 may further include a power supply to run the suction motor 140 and other electrical components of the hand vacuum 100. The power supply may be AC power supplied by an electrical cord (not shown) that may be plugged into a wall socket. Alternatively, or in addition to the electrical cord, the power supply of the hand vacuum 100 may include one or more onboard power sources, such as one or more energy storage members 144. Each energy storage member 144 of any suitable type, including, for example one or more batteries, such as solid-state batteries, and / or one or more capacitors, such as super capacitors or ultra capacitors. Each energy storage member 144 may be positioned in the main body 118 within an energy storage member housing 146, which may be integrally formed as part of the main body housing 120 and / or handle 122, or which may be removably mounted.

[0368] Optionally, the hand vacuum 100 may include a pre-motor filter 148 (as shown) and / or a post-motor filter 150 (see e.g., FIG. 34). The pre-motor filter 148 and post-motor filter 150 may respectively be positioned in the main body 118 within a pre-motor filter housing 152 and a post-motor filter housing 154. The pre-motor filter housing 152 and / or post-motor filter housing 154 may be integrally formed as part of the main body housing 120 or removably positioned therein. The pre-motor filter 148 may be positioned in the airflow path 138 downstream of the air treatment assembly 124 and upstream of the suction motor 140. The post-motor filter 150 may be positioned in the airflow path 138 downstream of the suction motor 140 and upstream of the clean air outlet 136.General Description of a Dirty Air Inlet

[0369] In use, dirty air may be drawn into the hand vacuum 100 through the dirty air inlet 134. Accordingly, the dirty air inlet 134 may be provided at the front end 108 and may be positioned proximate the upper end 112, the lower end 114, or any position therebetween. For example, in the embodiment illustrated in FIG. 2, the dirty air inlet 134 is provided at the front end 108 proximate the upper end 112 (see also e.g., FIGS. 32, 50, 70, 78, 91, 111, 114, 118, 135, 137, and 140). As another example, in the embodiment illustrated in FIG. 7, the dirty air inlet 134 is provided at the front end 108 at a position between the upper end 112 and the lower end 114 (see also e.g., FIGS. 54, 59, and 63). Optionally, as shown in FIG. 7, the dirty air inlet 134 can be centrally located between the upper and lower ends 112, 114 (see also e.g., FIGS. 74 and 105). The dirty air inlet 134 can also be provided at the front end 108 proximate the lower end 114 (see e.g., FIG. 88).General Description of an Air Inlet Conduit

[0370] Referring still to FIGS. 1 to 4, as shown, the dirty air inlet 134 may be provided at one end of an air inlet conduit 156. In this way, the end of the air inlet conduit 156 having the dirty air inlet 134 can be used as a nozzle to directly clean a surface. Optionally, the end of the air inlet conduit 156 having the dirty air inlet 134 can be connected to the wand 104 or an accessory tool such that the dirty air inlet 134 is downstream from an inlet of the wand 104, surface cleaning head 106, or the connected accessory.

[0371] Referring to FIGS. 2 to 3, the air inlet conduit 156 of the hand vacuum 100 has a conduit sidewall 158. As exemplified, the conduit sidewall 158 defines a channel 160 extending to the chamber air inlets 176. The conduit sidewall 158 that extends around the channel 160 may extend generally linearly in the direction of a conduit axis 164 for at least a portion of the length of the first channel 160 from the dirty air inlet 134 toward a dirty air outlet 162. As shown, the conduit axis 164 may be generally parallel to the hand vacuum axis 116 (see also e.g., FIGS. 52, 55, 72, 79, 89, 93, 106, 113, 116, 119, 136, 139, and 142). Optionally, the conduit axis 164 may be coaxial with the hand vacuum axis 116 (see e.g., FIGS. 7 and 75). Optionally, the conduit axis 164 may be at an angle to the hand vacuum axis 116 (see e.g., FIGS. 61 and 65).

[0372] The dirty air outlet 162 of the channel 160 may be axially opposed to the dirty air inlet 134 such that, as shown in FIG. 2, the conduit axis 164 may extend through both the dirty air inlet 134 and the dirty air outlet 162 (see also e.g., FIGS. 7, 61, 65, 89, 106, 113, 116, 119, 136, 139, and 142). Alternatively, in some embodiments, the dirty air outlet 162 of the channel 160 may be provided downstream from the dirty air inlet 134, such as in the conduit sidewall 158, such that the conduit axis 164 extends through the dirty air inlet 134 only (see e.g., FIGS. 52, 56, 72, 76, 79, and 93).

[0373] The channel 160 may form a header that extends angularly partially or fully around the air treatment chamber 128.

[0374] The dirty air outlet 162 of the first channel 160 may be in fluid flow communication with the air treatment chamber 128 of a first cleaning stage 1261 (optionally the only cleaning stage 126, as shown in FIGS. 1 to 4) of the air treatment assembly 124. Optionally, as shown, the dirty air outlet 162 may directly feed into the air treatment chamber 128 (i.e., without any intervening airflow passages) such that the conduit axis 164 may extend through each of the dirty air inlet 134, the dirty air outlet 162, and the air treatment chamber 128 of the first cleaning stage 1261 (see also e.g., FIGS. 7, 61, 65, 89, 106, 113, 116, 119, 136, 139, and 142). Alternatively, in some embodiments, the dirty air outlet 162 may indirectly feed into the air treatment chamber 128 (i.e., through an intervening airflow passage such as a tangential air inlet for a cyclone) such that the conduit axis 164 may extend through the dirty air inlet 134 only (see e.g., FIGS. 52, 72, and 79) or the dirty air inlet 134 and the air treatment chamber 128 only (see e.g., FIGS. 56, 75, and 93).

[0375] Optionally, a plurality of channels 160 may be provided. Each channel may be isolated from the other channel(s) and may deliver air to one or more chamber air inlets 176. Alternately, one or more channels may branch of a first channel 1601. In this latter case, a second channel 1602 may be in fluid flow communication with the first channel 1601 through a channel communication port 166. The channel communication port 166 may be provided at any location downstream of the dirty air inlet 134. For example, the channel communication port 166 may be axially opposed to the dirty air inlet 134 such that another conduit axis 1642 may extend through both the dirty air inlet 134 and the channel communication port 166 (see e.g., FIGS. 61 and 65). In such embodiments, the airflow path 138 may branch off and the airflow through the channel communication port 166 from the first channel 1601 into the second channel 1602 may be generally parallel to the airflow in the first channel 1601. Alternatively, instead of being axially opposed to the dirty air inlet 134, the channel communication port 166 may be further downstream such that the other conduit axis 1642 extends through the dirty air inlet 134 only (see e.g., FIGS. 66 and 71). In such embodiments, the airflow path 138 may branch off and the airflow through the channel communication port 166 from the first channel 1601 into the second channel 1602 may be tangential (e.g., at an acute angle) to the airflow in the first channel 1601. Further alternatively, the channel communication port 166 may be provided in the conduit sidewall 158 around the first channel 1601 (see e.g., FIGS. 13, 77, 119, and 142). In such embodiments, the airflow path 138 may branch off and the airflow through the channel communication port 166 may travel generally radially outwardly from the first channel 1601 into the second channel 1602.

[0376] Optionally, as described in greater detail subsequently herein, the channel communication port 166 may have a porous filtration material 168 such as a mesh or a screen (see e.g., FIGS. 7, 61, 65, 66, 71, 77, 119, and 142). Generally, the porous filtration material 168 of the channel communication port 166 may permit dirty air carrying finer dirt particles to pass through to the second channel 1602, while restricting the passage of coarse dirt particles. Those coarse dirt particles that may become stuck on the porous filtration material 168 may be stripped off of the porous filtration material 168 by the airflow travelling further downstream in the first channel 1601. The coarse dirt particles may then be carried downstream to the dirty air outlet(s) 162 of the first channel 1601.

[0377] The conduit sidewall 158 around the second channel 1602 may wrap around at least a portion of the air treatment chamber 128 of the first cleaning stage 1261 (optionally the only cleaning stage 126) from the channel communication port 166 to at least one dirty air outlet 162 of the second channel 1602. In this way, the second channel 1602 may form an annular header around at least part of the air treatment chamber 128 (which may therefore be partially of fully annular). Accordingly, the dirty air outlet(s) 162 (such as at the end of the first channel 1601) may be at least one primary dirty air outlet 1621, and the second channel 1602 may further include at least one secondary dirty air outlet 1622 (see e.g., FIGS. 8 to 10, 13, 51, 56, 61, 65, 66, 71, 77, 106, 113, 117, 119, and 142).

[0378] Each dirty air outlet 162 of the second channel 1602 may be in fluid flow communication with the air treatment chamber 128 of the first cleaning stage 1261 of the air treatment assembly 124. Optionally, each dirty air outlet 162 of the second channel 1602 may directly feed into the air treatment chamber 128 (i.e., without any intervening airflow passages). Optionally, as described in greater detail subsequently herein, each dirty air outlet 162 of the second channel 1602 (other than the downstream-most dirty air outlet 162) may have a porous filtration material 168 such as a mesh or a screen.

[0379] Optionally, more than one air inlet conduit 156 may be provided. Each air inlet conduit 156 may have one dirty air inlet 134 at one end thereof and at least one dirty air outlet 162 downstream of the dirty air inlet 134. Each air inlet conduit 156 may have a conduit sidewall 158 that may define a first channel 1601 and optionally a second channel 1602 in accordance with the foregoing general description of an air inlet conduit 156 (see e.g., FIGS. 11 to 12).General Description of an Air Treatment Assembly

[0380] The air treatment assembly 124 may be configured to treat the air in a desired manner, including, for example, removing dirt particles and other debris and / or water from the airflow. The air treatment assembly 124 may include at least one cleaning stage 126 and may optionally include two or more cleaning stages arranged in series with each other. Each cleaning stage 126 may comprise one or more air treatment chambers 128.

[0381] In any embodiment, one or more cleaning stages 126 may be cyclonic. Each cyclonic cleaning stage 124 may include one cyclonic air treatment chamber 128 or, optionally, a plurality of cyclonic air treatment chambers 128 arranged in parallel with each other. In such embodiments, the air treatment assembly 124 may alternatively be referred to as a cyclone assembly 122. Similarly, each cyclonic air treatment chamber 128 may alternatively be referred to as a cyclone chamber 128. For example, in the embodiment illustrated in FIGS. 2 to 4, the air treatment assembly 124 is a cyclone assembly 124 including a single cyclonic cleaning stage 126 having a single cyclone chamber 128.

[0382] In any embodiment, one or more cleaning stages 126 may be non-cyclonic. For example, the air treatment chamber 128 of a non-cyclonic cleaning stage 126 may be a non-cyclonic momentum separator. Within the air treatment chamber 128 of a non-cyclonic momentum separator, the airflow path 138 may include one or more significant directional changes (e.g., of 45°, 90° or more) whereby dirt particles with higher momentum than the air are separated (e.g., thrown) from the airflow during each directional change. As another example, as described in greater detail subsequently herein, the air treatment chamber 128 of a non-cyclonic cleaning stage 126 may be a spinning disc separator (see e.g., second stage air treatment chamber 1282 of FIGS. 29A and 29B).

[0383] Alternately, or in addition, the air treatment chamber 128 of any cleaning stage 126 may include a bag, an air treatment chamber having one or more outlet screens, a porous physical filter media (such as foam or felt), or other air treating means.

[0384] The air treatment assembly 124 may be configured to collect particulate matter separated from the airflow in any suitable location. Optionally, as shown in FIGS. 2 to 4, each cleaning stage 126 may include a dirt collection region 130 that is internal to the air treatment chamber 128. If a cleaning stage 126 includes a plurality of air treatment chambers 128, each air treatment chamber 128 may have an individual internal dirt collection region 130. Alternately, or in addition, as shown in FIGS. 2 to 4, each cleaning stage 126 may include one or more dirt collection chambers 132 that are external to the air treatment chamber(s) 128. If a cleaning stage 126 includes a plurality of air treatment chambers 128, each air treatment chamber 128 may have an individual external dirt collection chamber 132 or, alternatively, the air treatment chambers 128 may share a common external dirt collection chamber 132. Similarly, if an air treatment assembly 124 includes a plurality of cleaning stages 126, each cleaning stage 126 may have an individual external dirt collection chamber 132 or, alternatively, the cleaning stages 126 may share a common external dirt collection chamber 132.

[0385] Each cleaning stage 126 may include means for emptying each dirt collection region 130 and / or dirt collection chamber 132 thereof. For example, each cleaning stage 126 may include one or more openable portions (e.g., doors) movably mounted by a mount or removably mounted for emptying each dirt collection region 130 and / or dirt collection chamber 132. As described in greater detail subsequently herein, depending on the configuration of the hand vacuum 100, the openable portion(s) may be concurrently openable or separately sequentially openable. If the openable portions are concurrently moveable, the openable portions may be operatively connected to move in synchronization or integrally formed (i.e., such that a single moveable portion opens more than one dirt collection region 130 and / or dirt collection chamber 132).

[0386] Additionally, or alternatively, the air treatment assembly 124 may be moveably connected (e.g., moveably or removably) to the main body 118 for emptying. For example, the air treatment assembly 124 may be fully removable from the main body 118 whereby removing the air treatment assembly 124 may open one or more the various dirt collection regions / chambers 130, 132 for emptying and / or permit transport of the air treatment assembly 124 to, e.g., a refuse bin or docking station to empty the various dirt collection regions / chambers 130, 132 via the one or more openable portions. As another example, the air treatment assembly 124 may be moveably connected (e.g., pivotably, translatably, etc.) to the main body 118 whereby moving the air treatment assembly 124 may open one or more of the various dirt collection regions / chambers 130, 132 for emptying. A fully moveable / removable air treatment assembly 124 may advantageously allow access to additional portions of the hand vacuum 100 that would otherwise be concealed (e.g., the pre-motor filter housing 152) such as for cleaning, inspection, and the like.General Description of a First Stage Air Treatment Chamber

[0387] Referring again to FIGS. 2 to 4, as shown, the air treatment chamber 128 may have a central axis 170. If the air treatment chamber 128 is a cyclone chamber, then the central axis 170 may alternatively be referred to as a cyclone axis of rotation 170 about which the airflow path 138 rotates within the air treatment chamber 128 (see also e.g., FIGS. 22 to 27, 52, 55, 60, 64, 72, 75, 79, 93, 106, 113, 117, and 124, 127, 128, 131, 132, and 136). If the air treatment chamber 128 is non-cyclonic, then the central axis 170 may be the longitudinal axis of the air treatment chamber 128. As used herein, “central” means the central axis 170 is centrally located in the air treatment chamber 128 and generally equally spaced from a treatment chamber sidewall 172 of the air treatment chamber 128.

[0388] The air treatment chamber 128 may be any type of cyclone chamber, such as a transverse cyclone chamber, a horizontal cyclone chamber, or a vertical cyclone chamber. The orientation of the central axis 170 may depend on the type of air treatment chamber 128.

[0389] For example, in embodiments where the air treatment chamber 128 is a transverse cyclone chamber, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the central axis 170 of the air treatment chamber 128 may also be oriented horizontally and may extend generally transverse to the hand vacuum axis 116 (i.e., intersecting the laterally opposed sides of the hand vacuum 100; see e.g., FIGS. 3, 22 to 27, 34 to 35, 106, 124, 128, and 136). Optionally, in such embodiments, the central axis 170 of the air treatment chamber 128 may intersect the hand vacuum axis 116 (they may line in a common plane). Further, in such embodiments, the central axis 170 may be at a mid-line of the air treatment chamber 128 at an elevation equidistantly between a lower end of the air treatment chamber 128 and an upper end of the air treatment chamber 128 and equidistantly positioned between the front and rear ends of the air treatment chamber 128.

[0390] Similarly, in embodiments where the air treatment chamber 128 is a horizontal cyclone chamber, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the central axis 170 of the air treatment chamber 128 may be generally parallel to the hand vacuum axis 116 (i.e., intersecting the front and rear ends 108, 110 of the hand vacuum 100; see e.g., FIGS. 52, 72, 75, 78, and 93). Optionally, in such embodiments, the central axis 170 of the air treatment chamber 128 may be coaxial with the hand vacuum axis 116 (see e.g., FIGS. 52, 72, 75, and 78). Further, in such embodiments, the central axis 170 may be at a mid-line of the air treatment chamber 128 at an elevation equidistantly between the lower end of the air treatment chamber 128 and the upper end of the air treatment chamber 128 and equidistantly positioned between the opposed lateral sides of the air treatment chamber 128.

[0391] Alternatively, in embodiments where the air treatment chamber 128 is a vertical cyclone chamber, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the central axis 170 of the air treatment chamber 128 may be oriented vertically and may extend generally transverse to the hand vacuum axis 116 (i.e., intersecting the upper and lower ends 112, 114 of the hand vacuum 100; see e.g., FIGS. 55, 60, 64, 113, 117, and 132). Optionally, as shown in these embodiments, the central axis 170 of the air treatment chamber 128 may intersect the hand vacuum axis 116.

[0392] If it will be appreciated that, in any air treatment member, the central axis 170 may be oriented with respect to the conduit axis 164 of the air inlet conduit 156 similar to as described with respect to the hand vacuum axis 116 in embodiments in which the conduit axis 164 is generally parallel to the hand vacuum axis 116. For example, when the hand vacuum 100 is oriented as described previously, the central axis 170 may be horizontal and extend generally transversely to the conduit axis 164 (see e.g., FIGS. 3, 22 to 27, 106, 127, 131, and 136) and, in some embodiments, intersect the conduit axis 164. As another example, when the hand vacuum 100 is oriented as described previously, the central axis 170 may be horizontal and extend generally parallel to the conduit axis 164 (see e.g., FIGS. 52, 72, 79, and 93) and, in some embodiments, coaxial with the conduit axis 164 (see e.g., FIG. 75). As yet another example, when the hand vacuum 100 is oriented as described previously, the central axis 170 may be vertical and extend generally transversely to the conduit axis 164 (see e.g., FIGS. 60 and 64) and, in some embodiments, intersect the conduit axis 164 (see e.g., FIGS. 55, 113, 117, and 132).

[0393] Referring again to FIGS. 3 to 4, as shown, the air treatment chamber 128 may have a first end wall 1741 and an axially opposed second end wall 1742. The treatment chamber sidewall 172 may extend between the first and second end walls 174. Similar to as described with respect to the central axis 170, the orientation of the treatment chamber sidewall 172 may depend on the type of air treatment chamber 128. For example, the treatment chamber sidewall 172 of a transverse cyclone may extend generally transversely to the hand vacuum axis 116 (see e.g., FIGS. 3 to 4, 22 to 27, 34 to 35, 106, 127, 131, 136, 138, and 142). In such embodiments, the first and second end walls 174 may be laterally opposed within the coordinate system of the hand vacuum 100 as a whole. Similarly, if the air treatment chamber 128 is a vertical cyclone, the treatment chamber sidewall 172 may extend generally transversely to the hand vacuum axis 116 and the first and second end walls 174 may be vertically opposed within the coordinate system of the hand vacuum 100 as a whole (see e.g., FIGS. 55, 60, 64, 113, 117, and 132). Further, if the air treatment chamber 128 is a horizontal cyclone, the treatment chamber sidewall 172 may extend generally parallel to the hand vacuum axis 116 and the first and second end walls 174 may be longitudinally opposed within the coordinate system of the hand vacuum 100 as a whole (see e.g., FIGS. 52, 72, 75, 79, and 93).

[0394] The air treatment chamber 128 may have any cross-sectional shape in a plane that is transverse to the central axis 170 (e.g., taken along line 2-2 in FIG. 1, line 33-33 in FIG. 32, line 66-66 in FIG. 50, line 56-56 in FIG. 54, line 61-61 in FIG. 59, line 65-65 in FIG. 63, line 71-71 in FIG. 70, line 77-77 in FIG. 74, line 89-89 in FIG. 88, line 106-106 in FIG. 105, line 136-136 in FIG. 135, line 138-138 in FIG. 137, and line 141-141 in FIG. 140). For example, the cross-sectional shape of the air treatment chamber 128 may be generally circular (see e.g., FIGS. 2, 33, 51, 56, 61, 65, 66, 71, 77, 89, 106, 119, 136, 138, and 142). In such embodiments, the treatment chamber sidewall 172 may extend generally linearly between the first and second end walls 174. A generally circular cross-section may improve cyclonic airflow in embodiments in which the air treatment chamber 128 is a cyclone chamber.

[0395] Optionally, as shown in FIG. 14, one or more portions of the sidewall of the air treatment chamber—shown as the rear side of the air treatment chamber 128—may be flat such that the cross-sectional shape of the air treatment chamber 128 may be a major segment (i.e., a shape formed by an arc of more than half of a circumference of a generally circular shape and a straight line segment connecting the endpoints of the arc). A flat side of the cyclone, such as the rearward side, may advantageously enable a more compact hand vacuum 100 in the longitudinal (front / rear) direction without significantly interfering with the dirt separation efficiency of the air treatment chamber 128. Any other shape may be possible, such as generally rectangular or square (e.g., in a non-cyclonic momentum separator). Further, as discussed subsequently, the air treatment chamber (cyclone chamber) may be trapezoidal.

[0396] The air treatment chamber 128 may include at least one chamber air inlet 176. Each chamber air inlet 176 of the air treatment chamber 128 may be fluidly connected to a corresponding dirty air outlet 162 of the air inlet conduit 156. Dirty air may exit the dirty air outlet(s) 162 of the air inlet conduit 156 and enter the air treatment chamber 128 through the corresponding chamber air inlet 176 in the treatment chamber sidewall 172. As exemplified in each of FIGS. 2 and 7 to 13, wherein the air treatment chamber 128 is cyclonic, each chamber air inlet 176 may be a tangential air inlet (see also e.g., FIGS. 51, 56, 61, 65, 66, 71, 77, 106, 119, 132, 136, 139, and 142). That is, dirty air may be introduced into the air treatment chamber 128 in a tangential direction (e.g., along the treatment chamber sidewall 172). Alternately, the chamber air inlet 176 may be an axial air inlet that is used to introduce dirty air into the air treatment chamber 128 in the axial direction thereof.

[0397] The tangential chamber air inlet(s) 176 may be provided in the treatment chamber sidewall 172 at any location around the circumference of the air treatment chamber 128. For example, as shown in FIG. 2, the air treatment chamber 128 has only one tangential chamber air inlet 176 and the chamber air inlet 176 may be provided at the upper end of the air treatment chamber 128 (see also e.g., FIGS. 94, 130, 136, and 139). The one chamber air inlet 176 may alternatively be provided at any other location between the upper and lower ends of the air treatment chamber 128, such as at the lower end (see e.g., FIG. 7).

[0398] As another example, if the air treatment chamber 128 has more than one tangential chamber air inlet 176, then the chamber air inlets 170 may be circumferentially spaced apart about the treatment chamber sidewall 172 (see e.g., FIGS. 8 to 13, 51, 56, 61, 65, 66, 71, 106, 113, 117, 119, and 142). Stated another way, the tangential chamber air inlets 176 may be angularly spaced apart about the central axis 170. The chamber air inlets 176 may have any circumferential / angular spacing, which may correspond to the spacing of the dirty air outlets 162 of the air inlet conduit 156.

[0399] If the air treatment chamber 128 is cyclonic, providing more than one chamber air inlet 176 may advantageously enable the use of a cyclone chamber having a shorter axial length and, therefore, may advantageously provide a more compact hand vacuum 100. The dirty air flow entering the air treatment chamber 128 may maintain generally the same width as the outlet port of the chamber air inlet 176 (i.e., in the direction of the central axis 170) while following the cyclonic airflow path 138. Accordingly, the air treatment chamber 128 may have an axial length that is a multiple of the width of the chamber air inlet 176 (i.e., in the direction of the central axis 170) such that the airflow path 138 may complete a minimum desired number of revolutions within the air treatment chamber 128 before reaching an air outlet of the air treatment chamber 128. For example, the air treatment chamber 128 may have an axial length that is 2.5, 3, 3.5, 4 or more times the width of the outlet port of the chamber air inlet 176 such that the airflow path may complete 2.5, 3, 3.5, 4 or more revolutions within the air treatment chamber 128 before reaching an air outlet of the air treatment chamber 128 or reversing direction towards the air outlet. The air treatment chamber 128 and chamber air inlet 176 may thus be sized to achieve a minimum desirable separation efficiency, which may be influenced at least by the number of revolutions of the airflow path 138 within the air treatment chamber 128. For example, at least 3 revolutions may achieve a minimum desirable separation efficiency. Accordingly, increasing the number of chamber air inlets 176 may enable the width of each chamber air inlet 176 to be shorter while introducing dirty air into the air treatment chamber 128 at about the same air flow rate. This, in turn, may enable the air treatment chamber 128 to be shorter while achieving the desired number of revolutions within the air treatment chamber 128 and thus meeting or exceeding the minimum desirable separation efficiency.

[0400] Treated air may exit the air treatment chamber 128 through one or more chamber air outlets which may comprise or consist of chamber air outlet ports 178 in the first and / or second end walls 174. Optionally, if only one chamber air outlet is used, the air treatment chamber 128 can be a cyclone with unidirectional airflow (i.e., a “uniflow” cyclone chamber wherein the chamber air inlet 176 and chamber air outlet port 178 are at opposite ends of the air treatment chamber 128; see e.g., FIGS. 22, 53, and 93). Alternatively, the air treatment chamber 128 may be configured so that the chamber air inlet 176 and chamber air outlet port 178 are located toward the same end of the air treatment chamber 128 (as is typical of a cyclone; see e.g., FIGS. 23, 55, 60, 64, 67, 79, 113, and 117) and, if the cyclone is vertically oriented with the air inlet and air outlet at the bottom (e.g., the opposite of that shown in FIG. 113B), may be referred to as an inverted cyclone. Further alternatively, the air treatment chamber 128 may be configured so that the chamber air inlet 176 is centered between the first and second end walls 174 (i.e., a hybrid cyclone chamber wherein the airflow path splits into bidirectional airflow paths; see e.g., FIG. 27). In typical cyclone and hybrid embodiments, the chamber air outlet port 178 may be provided in one of the end walls 174 and the other of the end walls 174 may be air impermeable (e.g., a solid planar wall).

[0401] As discussed subsequently, in the embodiment illustrated in FIGS. 1 to 4, the air treatment chamber 128 is a split-flow cyclone with bidirectional airflow to two chamber air outlets 178 from one centrally located chamber air inlet 176 (see also e.g., FIGS. 24 to 26). That is, in the illustrated embodiments, each of the first and second end walls 174 of the air treatment chamber 128 has one chamber air outlet port 178 and the chamber air inlet 176 is generally centrally located between the first and second end walls 174. In this way, the airflow path 138 entering the air treatment chamber 128 may divide into two airflow paths, wherein each airflow path travels to a respective one of the chamber air outlets.

[0402] Any air treatment chamber air outlet may be used and each chamber air outlet may be the same or different and may have a porous member 180, such as a screen or mesh, positioned over the chamber air outlet port 178. Each porous member 180 may extend axially inwardly into the air treatment chamber 128 from the end wall 174 in which the respective chamber air outlet port 178 is provided. Optionally, each chamber air outlet may comprise an air outlet conduit 182, which may be partially or fully air impermeable, having a length extending from the chamber air outlet port 178 in the respective end wall 174 (i.e., an outlet end), to a distal end (i.e., an inlet end), which is axially spaced from the end wall 174. In such embodiments, the porous member 180 of each chamber air outlet may extend axially inwardly into the air treatment chamber 128 from the distal end of the respective air outlet conduit 182.

[0403] The porous member(s) 180 may have any shape such as, for example, semi-spherical (see e.g., FIGS. 22, 25, 26, and 27), cylindrical (see e.g., FIGS. 55 and 64), flat (see e.g., FIG. 26), conical (see e.g., FIG. 67), or frusto-conical (see e.g., FIGS. 23 and 24). If there is more than one chamber air outlet, the porous members 180 of the chamber air outlets 178 may have the same shape (see e.g., FIGS. 24 and 25) or may be differently shaped (see e.g., FIG. 26). The air outlet conduit 182 may optionally be a continuation of the shape of the porous member 180 or, alternatively, may be cylindrical in shape.

[0404] The porous member 180 may include a screen through which the airflow path 138 passes. The screen may have a plurality of pores, and the pores may have any size suitable for permitting the passage of air therethrough while restricting the passage of particulate matter. The screen may be self-supporting (e.g., rigid) and / or supported by a plurality of ribs extending along the screen.

[0405] The porous member 180 may include solid portion facing each chamber air inlet 176 in embodiments where the chamber air inlet(s) 176 and the chamber air outlet port 178 are positioned proximate the same end wall 174 (see e.g., FIGS. 23, 68 to 69, 72 to 73, and 79 to 82). The solid portion may be air impermeable, which may prevent the airflow path 138 from passing directly from the chamber air inlet(s) 176 through the porous member 180 to the chamber air outlet port 178. This may also prevent the pores of the porous member 180 from becoming clogged by the dirty airflow directly impacting on the screen. The rest of the air outlet conduit 182 may be porous or air impermeable.

[0406] The porous members 180 may optionally be removably connected (e.g., threadably, snap-fit, etc.) to the respective end wall 174 over the chamber air outlet port 178. Similarly, the porous members 180 may optionally be removably connected to the air outlet conduit 182, if present. In such embodiments, the air outlet conduit 182, if present, may optionally be integrally formed with the end wall 174. Alternatively, the air outlet conduit 182 may optionally be removably connected to the respective end wall 174. In such embodiments, the porous member 180 may optionally be integrally formed with the air outlet conduit 182. In any such embodiments, the porous members 180 may advantageously be removed from the end wall 174 for inspection, cleaning, and / or replacement. Further, porous members 180 of various shapes may advantageously be interchangeably connected to the end wall 174 to change the airflow dynamics and / or collection capacity of the dirt collection region 130 of the air treatment chamber 128.

[0407] The porous member(s) 180 alone or collectively with their respective air outlet conduits 182, if present, may also be referred to herein as vortex finders and / or porous vortex finders. Optionally, as described in greater detail subsequently herein, if a chamber air outlet port 178 is provided in only one of the end walls 174, the air treatment chamber 128 may optionally include a vortex finder 184 comprising an air impermeable air outlet conduit 182 extending axially inwardly into the air treatment chamber 128 from the axially opposed end wall 174 (see e.g., FIG. 22). The vortex finder 184 may have any shape such as those described with respect to the porous member 180 (alone or in combination with the air outlet conduit 182). The vortex finder 184 may optionally be removably connected to the respective end wall 174 such as described with respect to the porous member 180, which may confer similar advantages to those described.

[0408] Optionally, if the air treatment chamber 128 is a cyclone chamber, the porous member(s) 180 may include a ring 185 extending outwardly from a distal end of the porous member 180 toward the treatment chamber sidewall 172 (see e.g., FIGS. 60, 113, 117, and 132).

[0409] Optionally, if the air treatment chamber 128 is a cyclone chamber, the air treatment chamber 128 may include one or more vanes 186 extending axially inwardly into the air treatment chamber 128 from the first and / or second end wall 174. Each vane 186 may be a circular ring (around the chamber air outlet, if present). Optionally, if more than one vane 186 is provided in an end wall 174, the vanes 186 may be arranged in concentric rings (see e.g., FIGS. 55 to 58, and 72 to 73). The vanes 186 may assist in guiding the cyclonic airflow path 138 within the air treatment chamber 128 as the airflow path 138 moves radially inwardly toward the chamber air outlet(s) 178.General Description of a First Stage Dirt Collection Region

[0410] Referring again for FIGS. 2 to 4, as shown, the air treatment chamber 128 of the first cleaning stage 1261 may include a dirt collection region 130 internal to the air treatment chamber 128 (see also e.g., FIGS. 55, 57 to 58, 60, 64, 72 to 73, 75 to 76, 79 to 82, 90, 93, 106 to 107, 113, 116 to 117, 119 to 131, 132, 136, 138, and 142). Accordingly, at least some of the particulate matter separated by the porous member 180 and / or other separation means (e.g., momentum separation) may remain in the air treatment chamber 128. The dirt collection region may be at an end of the air treatment chamber axially opposed to the air outlet end of the air treatment chamber or in a recess or the like of the air treatment chamber.

[0411] In such embodiments, the treatment chamber sidewall 172 may include a moveable portion 188 that is moveably connected to the treatment chamber sidewall 172. Alternately or in addition the moveable portion may be part or all of an end wall may be moveably mounted. The moveable portion 188 may be moveably connected (e.g., pivotally or translatably) to the treatment chamber sidewall 172 by a mount 190. The mount 190 may be any suitable mechanism for moveably connection the moveable portion 188 to the rest of the treatment chamber sidewall 172 (the stationary portion). For example, the mount 190 may be a rotatable mount such as a hinge (as shown in the illustrated embodiments), sliding tracks, and the like.

[0412] The mount 190 may be provided at any suitable location. For example, as discussed subsequently, a rotatable mount 190 may be provided at a front end of the air treatment chamber 128 such that, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the movable portion 188 may rotate forwardly and upwardly (see e.g., FIGS. 15A to 15B, 17, 20A to 20B, 20C to 20D, 28, 33A, 42, 48, 75, 81, 84, 86A to 86B, 113, and 117). As another example, a rotatable mount 190 may be provided at a lower end of the air treatment chamber 128 such that, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the movable portion 188 may rotate downwardly and rearwardly (see e.g., FIGS. 16A to 16B, 58, 68, 73, 120, 123, 125, 126, 130, and 145). As yet another example, a translatable mount 190 may be provided proximate, e.g., the end walls 174 of the air treatment chamber 128 such that, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the movable portion 188 may translate forwardly (see e.g., FIG. 21A). Any other location of the mount 190, providing any other directional motion, may be used. This may depend, for example, on the desired location of the moveable portion 188 and / or the relative location of the air treatment chamber 128 to the dirt collection chamber 132.

[0413] The moveable portion 188 may be moveable between a closed position in which the air treatment chamber 128 is closed and an open position in which the air treatment chamber 128 is open. When the moveable portion 188 is in the closed position, the hand vacuum 100 may be operable to clean a surface. When the moveable portion 188 is in the open position, the dirt collection region 130 may be placed in communication with a volume exterior to the air treatment chamber 128. For example, the dirt collection region 130 may be placed in communication with an external dirt collection chamber 132, an exterior of the hand vacuum 100 (see e.g., FIGS. 55, 57 to 58, 73, 75, 81, 107, 113, and 117), or both (see e.g., FIGS. 17, 20A to 20B, 21A, 28, 33A, 42, 48, 68, 84, 86A to 86B, 120, 123, 125, 126, 130, 143, and 145), such that the contents in the dirt collection region 130 may be transferred thereto.

[0414] Optionally, the moveable portion 188 can be secured in the closed position using any suitable type of locking mechanism, including a latch mechanism that can be released by a user and / or docking at a docking station. The actuator for opening / releasing the moveable portion 188 can be provided on the air treatment assembly 124 itself, on the main body 118, or on any other portion of the hand vacuum 100 and / or the docking station.General Description of a First Stage Dirt Collection Chamber

[0415] Additionally, or in the alternative to a dirt collection region 130 internal to the air treatment chamber 128, a cleaning stage, such as the first cleaning stage 1261, may include a dirt collection region that is external to the air treatment chamber of that stage. For example, in the embodiment illustrated in FIGS. 2 to 4, the first cleaning stage 1261 includes the dirt collection chamber 132 that is external to the air treatment chamber 128 (see also e.g., FIGS. 52 to 53, 67 to 69, 89 to 90, 92 to 94, 106 to 107, 119 to 131, 136, 139, and 142).

[0416] In such embodiments, the air treatment chamber 128 may be in communication with the dirt collection chamber 132 by one or more dirt outlets 192, which may be of any configuration known in the art. For example, as shown, each dirt outlet 192 may be a slot opening provided in the treatment chamber sidewall 172 between the first and second end walls 174. Each dirt outlet 192 may allow particulate matter to pass from the air treatment chamber 128 to the external dirt collection chamber 132. Accordingly, at least some of the particulate matter separated by momentum separation (e.g., thrown from the air flow by a cyclonic airflow path 138 or by a directional change in a non-cyclonic airflow path 138) and / or other separation means (e.g., the porous member 180) may pass through the one or more dirt outlets 192 of the air treatment chamber 128 into the dirt collection chamber 132. The separated dirt particles may be thrown through the dirt outlet(s) 192 and / or fall therethrough under the force of gravity.

[0417] The dirt outlet(s) 192 may face forwardly, rearwardly, and / or downwardly, depending on the location of the dirt collection chamber 132 relative to the air treatment chamber 128. For example, in the embodiment illustrated in FIGS. 2 to 4, the dirt collection chamber 132 is below the air treatment chamber 128 and the dirt outlets 192 are provided in the lower end of the air treatment chamber 128 facing generally downwardly (see also e.g., FIGS. 15, 53, 67, 80, and 93). As another example, in the embodiment illustrated in FIGS. 16A to 16B, the dirt collection chamber 132 is forward of the air treatment chamber 128 and the dirt outlets 192 are provided in a front end of the air treatment chamber 128 facing generally forwardly (see also e.g., FIGS. 89, 119 to 131, and 142). As yet another example, in the embodiment illustrated in FIG. 7, the dirt collection chamber 132 is rearward of the air treatment chamber 128 and the dirt outlets 192 are provided in the rear end of the air treatment chamber 128 facing generally rearwardly (see also e.g., FIG. 106).

[0418] The dirt collection chamber132 may surround all or part of the air treatment chamber 128 (i.e., all or part of the lower end, the rear end, the front end, and any combination thereof). Accordingly, it will be appreciated that the dirt outlet(s) 192 may be positioned at any location within the portion of the air treatment chamber 128 that is surrounded by the dirt collection chamber 132.

[0419] In some embodiments, the air treatment chamber 128 may have one dirt outlet 192 with the long dimension extending through the treatment chamber sidewall 172 generally parallel to the central axis 170 (see e.g., FIG. 22). Alternately, the air treatment chamber 128 may have a plurality of dirt outlets 192 extending through the treatment chamber sidewall 172 having a long dimension generally parallel to the central axis 170 (see e.g., FIGS. 3, 24, 25, and 27). Similarly, the air treatment chamber 128 may have one dirt outlet 192 (see e.g., FIGS. 23, 53, 67, 80, and 93) or, alternatively, a plurality of dirt outlets 192 (see e.g., FIGS. 26, 106, 121 to 131, 136, 139, and 142) extending through the treatment chamber sidewall 172 having a long dimension generally transverse to the central axis 170. As shown in the embodiments having one dirt outlet 192, the dirt outlet 192 may be an elongated slot at any location between the first and second end walls 174. As shown in the embodiments having two dirt outlets 192, the dirt outlets 192 may be shorter slots spaced apart toward respective end walls 174 of the air treatment chamber 128. Any other number of dirt outlets 192, having any other orientation relative to the central axis 179, may be used.

[0420] Each dirt outlet 192 may be spaced apart from the chamber air inlet(s) 176. For example, in embodiment illustrated in FIG. 3, the dirt outlets 192 are axially spaced apart from the central chamber air inlet 176 on laterally opposed sides thereof such that incoming dirty airflow may enter the air treatment chamber 128 axially between the dirt outlets 192 (see also e.g., FIGS. 24 to 27, 106, 121 to 131, 136, 139, and 142). As another example, if only one dirt outlet 192 is used, the chamber air inlet(s) 176 may be proximate one end wall 174 and the dirt outlet 192 may be proximate the opposite end wall 174 (see e.g., FIGS. 22, 23, 53, 67, 79 to 80, and 93).

[0421] Spacing each dirt outlet 192 from the chamber air inlet(s) 176 may prevent incoming dirty airflow from passing through the dirt outlet(s) 192 directly from the chamber air inlet(s) 176. This may also enable the airflow path 138 to complete at least half of a revolution within the air treatment chamber 128 before passing over the dirt outlets 192. As the airflow path 138 travels cyclonically within the air treatment chamber 128, the airflow path 138 may tend to move radially inwardly toward the central axis 170 while the inertia of the dirt particles may cause the dirt particles to be tangentially thrown from the curved path to then fall along the treatment chamber sidewall 172. Accordingly, spacing the dirt outlets 192 from the chamber air inlet(s) 176 may enable the airflow path 138 to begin to separate from the treatment chamber sidewall 172 and to begin throwing dirt particles along the treatment chamber sidewall 172. In this way, air passing through the dirt outlet(s) 192 may be minimized or eliminated, which may decrease turbulence in the airflow path 138, while also enabling separated dirt particles to enter the dirt collection chamber without becoming re-entrained in the air flow.

[0422] Optionally, at least one dirt outlet 192 may be provided proximate one of the chamber air outlets 178. Optionally, the air inlet is at an end axially opposed to the air outlet. For example, in the embodiment illustrated in FIG. 26, the dirt outlet 192 is transverse to the central axis 170 and is provided below the chamber air outlet (see also e.g., FIGS. 53, 93, 106, 121 to 131, 136, and 139). In this way, in such embodiments, the airflow path 138 travelling toward each chamber air outlet port 178 may complete at least one revolution within the air treatment chamber 128 before passing over the dirt outlets 192.

[0423] Optionally, if only one chamber air outlet is provided, at least one dirt outlet 192 may be provided opposite the chamber air inlet 176. Optionally, the air inlet is at the end having the air outlet. For example, in the embodiment illustrated in FIG. 23, the dirt outlet 192 has a long dimension that is transverse to the central axis 170 and is provided proximate the second end wall 1742 opposite or spaced from the chamber air inlet 176 at the first end wall 1741 (see also e.g., FIGS. 67 and 79). In this way, the airflow path 138 travelling away from the chamber air inlet 176 (e.g., in a uniflow or hybrid configuration) may complete at least one revolution within the air treatment chamber 128 before passing over the dirt outlet 192.

[0424] Optionally, at least one dirt outlet 192 may be provided in the treatment chamber sidewall 172 adjacent the moveable portion 188 thereof. In such embodiments, at least one side of each dirt outlet 192 adjacent the moveable portion 188 may be defined by the moveable portion 188. For example, in the embodiments illustrated in FIGS. 22 and 24, the side of each dirt outlet 192 adjacent the moveable portion 188 and extending generally parallel to the central axis 170 is defined by the moveable portion 188. As another example, in the embodiments illustrated in FIGS. 23 and 26, the side of each dirt outlet 192 adjacent the moveable portion 188 and extending generally transverse to the central axis 170 is defined by the moveable portion 188 (see also e.g., FIG. 67). Accordingly, the dirt outlet is opened when the moveable portion 188 is opened.

[0425] In alternate embodiments, at least one dirt outlet 192 may be provided in the moveable portion 188 of the treatment chamber sidewall 172. In such embodiments, the dirt outlet 192 may be bordered by the moveable portion 188 of the treatment chamber sidewall 172 on at least two sides and bordered by the stationary portion of the treatment chamber sidewall 172 on at least one side. For example, in the embodiments illustrated in FIG. 27, each dirt outlet 192 is bordered by the moveable portion 188 of the treatment chamber sidewall 172 on two sides and bordered by the stationary portion of the treatment chamber sidewall 172 on the other two sides (see also e.g., FIG. 28). Optionally, as exemplified in FIG. 107, the dirt outlet 192 may be bordered on all sides by the moveable portion 188 (i.e., fully within the moveable portion 188; see also e.g., FIGS. 121 to 131).

[0426] The dirt collection chamber 132 may have any position relative to the air treatment chamber 128, such as forward of the air treatment chamber 128 (see e.g., FIGS. 16, 119 to 131, and 142), rearward of the air treatment chamber 128 (see e.g., FIG. 106), or below the air treatment chamber 128 (see e.g., FIGS. 2, 53, 67, 79, and 93). Additionally, the dirt collection chamber 132 may be any combination of positions relative to the air treatment chamber 128, such as at least partially forward and below the air treatment chamber 128 (see e.g., FIGS. 8 to 13, and 138), at least partially rearward and below the air treatment chamber 128 (see e.g., FIGS. 7 and 136), or any other combination.

[0427] When the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the dirt collection chamber 132 may have an upper end, a lower end, a front end, and a rear end. At least one of the upper end, lower end, front end, and rear end of the dirt collection chamber 132 may be bound, at least in part, by a portion of the treatment chamber sidewall 172. This may depend on the position of the dirt collection chamber 132 relative to the air treatment chamber 128. For example, if the dirt collection chamber 132 is below the air treatment chamber 128, at least part of the upper end of the dirt collection chamber 132 may be bound by a portion of the treatment chamber sidewall 172 at the lower end of the air treatment chamber 128 (see e.g., FIGS. 2, 15, 53, 67, 79, and 93). As another example, if the dirt collection chamber 132 is forward of the air treatment chamber 128, at least part of the rear end of the dirt collection chamber 132 may be bound by a portion of the treatment chamber sidewall 172 at the front end of the air treatment chamber 128 (see e.g., FIGS. 16, 89, 119 to 131, and 142). Similarly, if the dirt collection chamber 132 is rearward of the air treatment chamber 128, at least part of the front end of the dirt collection chamber 132 may be bound by a portion of the treatment chamber sidewall 172 at the rear end of the air treatment chamber 128 (see e.g., FIGS. 7 and 106).

[0428] In any such embodiments, at least a portion of the treatment chamber sidewall 172 that partially bounds the dirt collection chamber 132 may be the optional moveable portion 188 of the treatment chamber sidewall 172. In this way, the contents of the dirt collection region 130 within the air treatment chamber 128 may be emptied into the dirt collection chamber 132 by moving the moveable portion 188 from the closed position to the open position.

[0429] The remainder of the dirt collection chamber 132 may be bound by a dirt chamber sidewall 194. The dirt chamber sidewall 194 may include a front wall 196 at the front end, a bottom wall 198 at the lower end, and laterally opposed side walls. Optionally, if the hand vacuum 100 includes one or more air outlet ducts 208 (described in greater detail in the subsequent section) extending along the exterior surface of one or both end walls 174 of the air treatment chamber 128, the dirt collection chamber 132 may extend outwardly (e.g., transversely) beyond each end wall 174 of the air treatment chamber having an air outlet duct 208 thereon. In this way, the laterally opposed side walls of the dirt collection chamber 132 may be flush with the air outlet ducts 208, which may provide increased dirt collection capacity without increasing the overall size of the hand vacuum 100.

[0430] If the dirt collection chamber 132 is partially bound by a rounded portion of the treatment chamber sidewall 172, one or more crevices may be formed within the dirt collection chamber 132 at the intersection of the treatment chamber sidewall 172 and the dirt chamber sidewall 194. Such crevices may be formed where the junction of treatment chamber sidewall 172 and the dirt chamber sidewall 194 forms an acute angle. Accordingly, an enclosing wall 200 may be provided to seal each crevice so as to form a closed volume. For example, as shown in FIGS. 15 and 16, an enclosing wall 200 is provided at the junction of the bottom wall 198 and the treatment chamber sidewall 172, and at the junction of the front wall 196 and the treatment chamber sidewall 172, respectively (see also e.g., FIGS. 119 and 121). Sealing each crevice in a closed volume using the enclosing wall 200 may advantageously prevent the buildup of particulate matter that may become stuck within the tight crevice.

[0431] In any embodiment, the dirt collection chamber 132 may include one or more openable portions. The openable portions may provide one or more means of emptying the dirt collection chamber 132 and transferring the particulate matter collected therein (and optionally in the dirt collection region 130 of the air treatment chamber 128) to an exterior of the hand vacuum 100, such as a refuse bin. For example, the front wall 196 of the dirt collection chamber 132 may include a front door 202 that is moveably connected (e.g., pivotably or translatably) to, e.g., the dirt chamber sidewall 194 by a mount 190 (see e.g., FIGS. 15A to 15B, 17, 20A to 20B, 20C to 20D, 21A to 21B, 28, 33A to 33B, 48, 73, 75, 81, 113, 119 to 120, 130, 132, and 138). Additionally, or alternatively, the bottom wall 198 of the dirt collection chamber 132 may include a bottom door 204 that is moveably connected to the dirt chamber sidewall 194 by a mount 190 (see e.g., FIGS. 16A to 16B, 19, 52, 58, 68, 107, 119 to 131, 132, 136, and 142). Any other portion(s) of the dirt chamber sidewall 194 may be openable, such as the upper end of the dirt collection chamber 132 (see e.g., FIG. 107) or the rear end of the dirt collection chamber 132 (see e.g., FIGS. 92 and 134). As shown in FIGS. 92 and 134, opening the rear end of the dirt collection chamber 132 may include removing the air treatment assembly 124 from the main body 118 or, alternatively, moving (e.g., pivoting, translating, etc.) all or part of the air treatment assembly 124 relative to the main body 118. It will be appreciated that one openable portion may be used to empty collected dirt into a docking station, and another may be used by a user to manually empty collected dirt into, e.g., a refuse bin.

[0432] The mount 190 may be any suitable mechanism for moveably connecting the openable portion to the rest of dirt chamber sidewall 194. For example, the mount 190 may be a rotatable mount such as a hinge (see e.g., FIGS. 17 to 20), a translatable mount such as sliding tracks (see e.g., FIGS. 21A to 21B), and the like. Any other moveable connection type may be used.

[0433] The mount 190 may be provided at any suitable location relative to the openable portion. The location of the mount 190 may depend, for example, on the desired location of the openable portion of the dirt collection chamber 132 and / or the desired directional motion thereof. For example, with respect to the front door 202, the mount 190 may be provided at the front end 108 of the hand vacuum 100. When the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, a rotatable mount 190 may be provided proximate an upper end of the front door 202 such that the front door 202 may rotate forwardly and upwardly (see e.g., FIGS. 15A to 15B, 17, 20A to 20B, 20C to 20D, 21A to 21B, 28, 33B, 48, 75, 81, 113, and 132). Alternatively, the rotatable mount 190 may be provided proximate a lower end of the front door 202 such that the front door 202 may rotate forwardly and downwardly (see e.g., FIGS. 73, 120, 130, and 138). Further alternatively, a translatable mount 190 may be provided proximate the laterally opposed side walls of the dirt collection chamber 132 such that the front door 202 may translate forwardly (see e.g., FIG. 21A).

[0434] As another example, with respect to the bottom door 204, a rotatable mount 190 may be provided at the lower end 114 of the hand vacuum 100. When the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the rotatable mount 190 may be provided proximate a rear end of the bottom door 204 such that the bottom door 204 may rotate downwardly and rearwardly (see e.g., FIGS. 15A to 15B, 19, 52, 58, 68, 107, 119 to 131, 132, 136, and 142). Alternatively, the rotatable mount 190 may be provided proximate a front end of the bottom door 204 such that the bottom door 204 may rotate downwardly and forwardly (see e.g., FIG. 18B). Further alternatively, a translatable mount 190 may be provided proximate the laterally opposed side walls of the dirt collection chamber 132 such that the bottom door 204 may translate downwardly.

[0435] The openable portion (e.g., front door 202 and / or bottom door 204) may be moveable between a closed position in which the dirt collection chamber 132 is closed and an open position in which the dirt collection chamber 132 is opened. In the closed position, the hand vacuum 100 may be operable to clean a surface.

[0436] Optionally, the openable portion can be secured in the closed position using any suitable type of locking mechanism, including a latch mechanism that can be released by a user and / or a docking station. The actuator for opening / releasing the openable portion can be provided on the air treatment assembly 124 itself, on the main body 118, or on any other portion of the hand vacuum 100 and / or on a docking station.

[0437] In such embodiments, where the openable portion is the front door 202, the user may empty the dirt collection chamber 132 by holding the handle 122 with one hand and positioning the front door 202 over a refuse bin (i.e., with the hand vacuum 100 oriented with the rear end 110 at an elevation above the front end 108), and actuating the locking mechanism (e.g., with the same hand or the other hand) to allow the front door 202 to move to the open position and the contents of the dirt collection chamber 132 to fall forwardly from the hand vacuum 100 into the refuse bin below through the open front door 202.

[0438] Similarly, where the openable portion is the bottom door 204, the user may empty the dirt collection chamber 132 by holding the handle 122 with one hand and positioning the bottom door 204 over a refuse bin (i.e., with the hand vacuum 100 oriented with the upper end 112 at an elevation above the lower end 114), and actuating a locking mechanism to allow the bottom door 204 to move to the open position such that the collected particulate matter may fall downwardly from the hand vacuum 100 into the refuse bin below.

[0439] In addition to being manually moveable, or in alternate embodiments, the front door 202 and / or bottom door 204 may be automatically moveable. In such embodiments, each automatically moveable door may alternatively be referred to as an automatic emptying door. That is, in some embodiments, the front door 202 and / or bottom door 204 may itself be an automatic emptying door (see e.g., FIGS. 53, 57, 67, 89 to 90, 93 to 94, 119 to 131, and 141). Alternatively, in some embodiments, the front wall 196 and / or bottom wall 198 of the dirt collection chamber 132 may optionally include an automatic emptying door 206 (described subsequently) moveable independent of the front door 202 and bottom door 204 (see e.g., FIGS. 18A to 18C, 20A to 20B, and 21A to 21B). In any such embodiments, the automatic emptying door 206 may be automatically moveable between a closed position in which the dirt collection chamber 132 is closed and an open position in which the dirt collection chamber 132 is opened.

[0440] Optionally, in embodiments having a dedicated automatic emptying door 206, the front door 202 and / or bottom door 204 may also be automatically moveable separate from or concurrently with the automatic emptying door 206. Conversely, in embodiments having a dedicated automatic emptying door 206, the automatic emptying door 206 may be manually moveable separate from or concurrently with the front door 202 and / or bottom door 204.

[0441] Optionally, a door of the hand vacuum 100 may “automatically” move between its open and closed positions upon docking to a docking station (also referred to as an automatic emptying device) at the instigation of an operating system of the docking station or hand vacuum 100, upon manual actuation of an automatic emptying switch, or any upon any other suitable instigating means.General Description of an Air Outlet Duct

[0442] The hand vacuum 100 may include an air outlet duct 208 downstream of each chamber air outlet port 178. In use, the airflow path 138 may pass through each porous member 180 to separate at least some particulate matter from the air as it travels to each corresponding chamber air outlet port 178. The airflow path 138 may then pass through each chamber air outlet port 178 and into each corresponding air outlet duct 208.

[0443] The air outlet duct(s) 208 may be positioned outwardly from the first and second end walls 174 of the air treatment chamber 128 of the first cleaning stage 1261 (optionally the only cleaning stage 126) such that the central axis 170 intersects each air outlet duct 208. For example, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 generally horizontal, each air outlet duct 208 may be positioned laterally (transversely) outwardly of the air treatment chamber 128 (see e.g., FIGS. 3 to 4, 22 to 27, 34 to 35, 124, and 129), or vertically (i.e., upwardly or downwardly) outwardly of the air treatment chamber 128 (see e.g., FIGS. 113, 117, and 132).

[0444] Each air outlet duct 208 may extend generally rearwardly (i.e., toward the rear end 110 of the hand vacuum 100) from the air treatment chamber 128 through the air treatment assembly 124 (or along an outer wall of the air treatment assembly) toward the main body 118 (see e.g., FIGS. 3 to 4, 22 to 27, 34 to 35, 113, 117, and 132). Alternatively, each outlet duct 188 may extend generally downwardly (i.e., toward the lower end 114 of the hand vacuum 100) from the air treatment chamber 128 through the air treatment assembly 124 (see e.g., FIG. 37) or along an outer wall of the air treatment assembly.

[0445] Each air outlet duct 208 may guide the treated air exiting each chamber air outlet port 178 downstream from a chamber air outlet port 178 of the air treatment chamber 128 to the suction motor 140 and / or to any intervening elements. For example, each air outlet duct 208 may guide the treated air to one or more second stage air treatment chambers 1282 of a second cleaning stage 1262 of the air treatment assembly 124 and / or to an optional pre-motor filter 148.

[0446] Optionally, each air outlet duct 208 may be sized to include one or more elements within an interior thereof such that the treated air guided through the air outlet duct 208 may also be guided through the one or more elements therein. For example, each air outlet duct 208 may be sized to house a pre-motor filter 148. In such embodiments, the pre-motor filter housing 152 may be integrally formed as part of the air outlet duct 208 or removably positioned therein.

[0447] Optionally, each air outlet duct 208 may protrude outwardly from the air treatment chamber and / or main body 118. That is, each air outlet duct 208 may extend along an exterior of the corresponding end wall 174 of the air treatment chamber 128 and / or an exterior of the main body housing 120. For example, in the embodiment illustrated in FIGS. 3 and 4, each air outlet duct 208 extends along an exterior surface of the corresponding end wall 174 of the air treatment chamber 128 and an interior surface of an outer wall of the air treatment assembly (see also e.g., FIGS. 30, 31, 37). Accordingly, the width of the outlet duct 208 increases the width of the air treatment assembly. Alternatively, as discussed in more detail subsequently, each air outlet duct 208 may not increase the width of the air treatment assembly 124 and / or main body 118 as the end wall 174 of the air treatment chamber may extend inwardly in the downstream direction of air flow through the duct 208 (see e.g., FIGS. 25, 27, 34, and 35).

[0448] Optionally, the air treatment assembly 124 may be generally rectangular in cross-sectional shape in a plane that extends along the central axis 170 and intersects the lateral sides of the air treatment chamber 128 (e.g., taken along line 3-3 in FIG. 1). In such embodiments, the air treatment chamber 128 and the air outlet duct(s) 208 may be correspondingly shaped to produce the generally rectangular cross-sectional shape of the air treatment assembly 124. For example, both the air treatment chamber 128 and each air outlet duct 208 may be generally rectangular in cross-sectional shape (see e.g., FIGS. 3, 22 to 24, and 26). As another example, as discussed in more detail subsequently, the air treatment chamber 128 may be generally trapezoidal and each air outlet duct 208 may be generally triangular (e.g., right-angle triangle) in cross-sectional shape (see e.g., FIGS. 25, 27, 34, and 35). Any other corresponding shapes may be used to produce the generally rectangular cross-sectional shape. This may produce generally uniform outer dimensions of the air treatment assembly 124 of the hand vacuum 100.

[0449] Alternately, it will be appreciated that air may exit the chamber air outlet port 178 and enter a pre-motor filter housing or a second cleaning stage, as discussed subsequently.General Description of a Second Stage Air Treatment Chamber

[0450] Optionally, the cleaning stage 126 may be a first cleaning stage 1261 and the air treatment assembly 124 may include a second cleaning stage 1262 downstream of the first cleaning stage 1261. The second cleaning stage 1262 may be arranged in series with the first cleaning stage 1261 such that air exiting each first stage air treatment chamber 1281 of the first cleaning stage 1261 flows into one or more second stage air treatment chambers 1282 of the second cleaning stage 1262. As discussed previously, each second stage air treatment chamber 1282 may include an internal second stage dirt collection region 1302. Additionally, or alternatively, the second cleaning stage 1262 may include one or more external second stage dirt collection chambers 1322. Any design previously discussed may be used for the second stage air treatment chambers 1282.

[0451] In some embodiments, the second cleaning stage 1262 may be rearward of the first cleaning stage 1261. In such embodiments, the airflow path 138 may travel rearwardly from each chamber air outlet port 178 of the first stage air treatment chamber(s) 1281 through each air outlet duct 208 to the second stage air treatment chamber(s) 1282 (see e.g., FIGS. 28, 29A, 33 to 35, 113, 117, 132, and 142). Alternatively, the airflow path 138 may travel rearwardly from each chamber air outlet port 178 of the first stage air treatment chamber(s) 1281 directly to the second stage air treatment chamber(s) 1282 (see e.g., FIGS. 68 to 69, 72 to 73, 75 to 76, and 81 to 82).

[0452] Additionally, or alternatively, in some embodiments the second cleaning stage 1262 may be positioned laterally and / or vertically outwardly of the first cleaning stage 1261. In such embodiments, the central axis 170 of the first stage air treatment chamber 1281 may intersect the second cleaning stage 1262 and may intersect one or more of the second stage air treatment chamber 1282. The airflow path 138 may therefore travel outwardly through each chamber air outlet port 178 of the first stage air treatment chamber 1281 into each second stage air treatment chamber 1282. For example, if the first stage air treatment chamber 1281 is a transverse cyclone, the airflow path 138 may travel laterally outwardly through each chamber air outlet port 178 of the first stage air treatment chamber 1281 to a respective second stage air treatment chamber 1282 (see e.g., FIGS. 30 and 31). As another example, if the first stage air treatment chamber 1281 is a vertical cyclone, the airflow path 138 may travel vertically (i.e., upwardly and / or downwardly) outwardly through each chamber air outlet port 178 of the first stage air treatment chamber 1281 to a respective second stage air treatment chamber 1282 (see e.g., FIGS. 55, 60, and 64).

[0453] Optionally, the second cleaning stage 1262 may be positioned laterally / vertically outwardly of the first cleaning stage 1261 and a third cleaning stage 1263 may be rearward of the first and second cleaning stages 1261, 1262. In such embodiments, the airflow path 138 may travel laterally / vertically outwardly through each chamber air outlet port 178 of the first stage air treatment chamber 1281 to a respective second stage air treatment chamber 1282, and subsequently rearwardly from a chamber air outlet of each second stage air treatment chamber 1282 to one or more third stage air treatment chamber(s) 1283. The airflow path 138 may travel directly rearward from each second stage air treatment chamber 1282 to the one or more third stage air treatment chamber(s) 1283 or, optionally, travel rearwardly through an air outlet duct 208 positioned outward of each second stage air treatment chamber 1282 (see e.g., FIGS. 30 and 31).

[0454] Optionally, the second cleaning stage 1262 may be positioned rearward of the first cleaning stage 1261 and a third cleaning stage 1263 may be rearward of the second cleaning stage 1262. In such embodiments, the airflow path 138 may travel rearwardly from the first cleaning stage 1261 to the second cleaning stage 1262, and subsequently rearwardly from each the second cleaning stage 1262 to the third cleaning stage 1263.

[0455] The second cleaning stage 1262 may include one second stage air treatment chamber 1282 (see e.g., FIGS. 28, 29A, and 142) or, alternately, a plurality of second stage air treatment chambers 1282 arranged in parallel with each other (see e.g., FIGS. 30, 31, 33 to 35, 55, 60 and 62, 64, 67 to 69, 72 to 73, 75 to 76, 81 to 82, 112 to 113, 116 to 117, and 132).

[0456] As shown in these embodiments, each second stage air treatment chamber 1282 may include at least one chamber air inlet 210. For example, in the embodiments illustrated in FIGS. 28, 29A, 31, 55, 60 and 62, 72 to 73, and 117, each second stage air treatment chamber 1282 includes one chamber air inlet 210. In the embodiments illustrated in FIGS. 30, 34 to 35, 64, 67 to 69, 75 to 76, 81 to 82, 113, 132, and 142 each second stage air treatment chamber 1282 includes a plurality of chamber air inlets 210.

[0457] The chamber air inlet(s) 210 may be provided at any location. For example, each chamber air inlet 210 may be provided in a sidewall of the second stage air treatment chamber 1282 and may permit air to travel from an exterior space (e.g., a header or plenum) extending partially or fully around the second stage air treatment chamber 1282 to an interior thereof (see e.g., FIGS. 28, 29A, 34 to 35, 55, 60 and 62, 64, 67 to 69, 72 to 73, 75 to 76, 81 to 82, 113, 117, 132, and 142). In such embodiments, as shown, the plurality of chamber air inlets 210 may be spaced circumferentially about the second stage air treatment chamber 1282. Alternatively, each second stage air treatment chamber 1282 may be in direct fluid communication with a chamber air outlet of the first stage air treatment chamber 1282 such that the chamber air inlet(s) 210 may permit air to travel directly from an interior of the chamber air outlet into the interior of the second stage air treatment chamber 1282. For example, in the embodiment shown in FIG. 30, a header positioned radially outwardly of a plurality of chamber air inlets 210 are spaced circumferentially about the chamber air outlet of the first stage air treatment chamber 1281 within the interior of the header. As another example, in the embodiment shown in FIG. 31, a single chamber air inlet 210 is directly facing the chamber air outlet of the first stage air treatment chamber 1281.

[0458] As further shown in these embodiments, each second stage air treatment chamber 1282 may include at least one chamber air outlet 212. Treated air exiting each chamber air outlet 212 may travel downstream from the second stage air treatment chamber 1282 to the suction motor 140 through any intervening elements, such as air outlet duct(s) 208, one or more additional air treatment chambers 128 of one or more subsequent cleaning stages 126 and / or the pre-motor filter 148.

[0459] Each second stage air treatment chamber 1282 may be cyclonic (see e.g., FIGS. 28, 30, 34 to 35, 55, 60 and 62, 64, 67 to 69, 72 to 73, 75 to 76, 81 to 82, 113, 117, 132, and 142). For example, as shown in these embodiments, the second cleaning stage 1262 may include at least one cyclonic second stage air treatment chamber 1282, such as one cyclonic second stage air treatment chamber 1282 (see e.g., FIG. 142), or a plurality of cyclonic second stage air treatment chambers 1282 arranged in parallel with each other. The cyclonic second stage air treatment chamber(s) 1282 may be any shape such as cylindrical (see e.g., FIGS. 30, 113, 117, and 142) or frusto-conical (see e.g., FIGS. 28, 33 to 35, 55, 60, 64, 72, 76, 82, and 132). The second stage air treatment chambers 1282 may have any orientation when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 generally horizontal, such as horizontal (see e.g., FIGS. 29A, 30, 31, 33 to 35, 55, 60, 112, 115, and 142), transverse (see e.g., FIG. 133), vertical, angled (see e.g., FIG. 64), or a combination thereof (see e.g., FIGS. 28, 67 to 69, 72 to 73, 75, and 81). Optionally, the second stage air treatment chambers 1282 may protrude beyond the treatment chamber sidewall 172 and / or end walls 174 of the first stage air treatment chamber 1281 (see e.g., FIGS. 72, 112, 115, and 133).

[0460] Each second stage air treatment chamber 1282 may alternatively be non-cyclonic (see e.g., FIGS. 29A to 29B and 31). For example, as shown in these embodiments, the second cleaning stage 1262 may include a plurality of non-cyclonic second stage air treatment chambers 1282 arranged in parallel with each other. Optionally, as in the illustrated embodiments, the non-cyclonic second stage air treatment chambers 1282 may be spinning disc separators (e.g., a PL turbine) or a non-cyclonic momentum separator as discussed previously.

[0461] The cyclonic second stage air treatment chambers 1282 may separate particulate matter from the airflow by cyclonic momentum separation similar to as described with respect to the first stage air treatment chamber 1281. That is, in the embodiments shown, particulate matter separated from the air flow by a cyclonic airflow path 138 may be thrown through one or more dirt outlets 214 of the second stage air treatment chamber 1282 and / or fall therethrough under the force of gravity to an external dirt collection chamber 132.

[0462] The non-cyclonic second stage air treatment chambers 1282 may separate particulate matter from the airflow by momentum separation (i.e., directional changes in the airflow as described previously). Alternatively, referring to FIGS. 29A to 29B and 31, if the non-cyclonic second stage air treatment chamber 1282 is a spinning disc separator, each spinning disc separator may include a shaft 216 rotatably mounted within the second stage air treatment chamber 1282. Each spinning disc separator may further include one or a plurality of spaced apart discs 218 rigidly connected to the shaft 216. The discs 218 may have a shaft opening 220 for non-rotational mounting to the shaft 216, with the shaft opening 220 supported, e.g., on a plurality of arms and surrounded by a central opening 222. In use, the airflow path 138 may pass through one or more central opening 222 of the discs 218 between the arms and the shaft 216. Optionally, the central opening 222 may get successively narrower in diameter for each disc 218 moving in the downstream direction.

[0463] Each spinning disc separator may further include an upstream fan 2241 rigidly connected to the shaft 216 proximate the chamber air inlet 210 and a downstream fan 2242 rigidly connected to the shaft 216 proximate the chamber outlet 208. The discs 218 may be disposed between the upstream and downstream fans 224. In the illustrated embodiment, the airflow generated by the suction motor 140 may cause the fans 224 to rotate, which may thereby rotate the shaft 216 and the discs 218 thereon (i.e., a turbine-driven spinning disc separator). The upstream fan 2241 may also assist in drawing air into the second stage air treatment chamber 1282 and / or the downstream fan 2242 may also assist in expelling air from the second stage air treatment chamber 1282. Alternatively, an independent motor (not shown) may be provided to directly rotate the shaft 216 and the discs 218 and fans 224 thereon (i.e., a motor-driven spinning disc separator). Optionally, in the motor-driven embodiment, the fans 224 may be omitted.

[0464] Accordingly, the airflow path 138 through each spinning disc separator may pass through the chamber air inlet 210, the optional upstream fan 2241, the central opening 222 in each disc 218, the downstream fan 2242, and the chamber air outlet 212. Due to the rotation of the discs 218, the airflow through the central opening 222 may be drawn along the downstream side of each disc 218 and travel radially outwardly to an outer edge thereof. During this process, dirt particles in the airflow may tend to separate from the airflow due to the centrifugal forces exerted upon the particles. As such, the particles may be thrown radially outwardly to the walls of the second stage air treatment chamber 1282 before the airflow separates from the downstream side of the disc 218 and proceeds to the central opening 222 of the next disc 218 (or the chamber air outlet 212, from the final disc 218). The discs 218 may be spaced apart from the walls of the second stage air treatment chamber 1282 such that the separated dirt particles may fall along the walls to a lower end of the second stage air treatment chamber 1282 and through the dirt outlet 214 at a lower end thereof. It will be appreciated that any PL turbine design may be used.General Description of Second Stage Dirt Collection

[0465] The second cleaning stage 1262 may include a second stage dirt collection region 1302 that is internal to each second stage air treatment chamber 1282 and / or each second stage air treatment chamber 1282 in the second cleaning stage 1262 may have a dirt outlet 214 in communication with a second stage dirt collection chamber 1322 that is external to each second stage air treatment chamber 1282 similar to that described with respect to the first stage air treatment chamber 1281. The dirt outlet 214 may be a slot outlet provided in the sidewall or end wall of each second stage air treatment chamber 1282 as described previously with respect to the first stage air treatment chamber 1281. The second stage dirt collection chamber 1322 may have any position relative to the second stage air treatment chamber(s) 1282 such as below thereof (see e.g., FIGS. 30, 31, 33B, 55, 60, 64, 67 to 69, and 132), forward thereof (see e.g., FIGS. 72 to 73, and 75 to 76), or both below and forward thereof (see e.g., FIGS. 28, 29A, 33A, 81, 113, 117, and 142).

[0466] Optionally, the dirt outlet 214 of each second stage air treatment chamber 1282 in the second cleaning stage 1262 may be in communication with a respective second stage dirt collection chamber 1322. That is, each second stage air treatment chamber 1282 may have an individual corresponding second stage dirt collection chamber 1322. For example, as shown in the embodiments illustrated in FIGS. 30 and 31, separated dirt particles may be discharged through the dirt outlet 214 of each second stage air treatment chamber 1282 into a corresponding second stage dirt collection chamber 1322. Each second stage dirt collection chamber 1322 may be adjacent to the first stage dirt collection chamber 1321 such as laterally beside (as exemplified), rearward, or below, for example. While the second stage dirt collection chambers 1322 are shown below the second stage air treatment chambers 1282, it will be appreciated that the second stage dirt collection chambers 1322 may be at any other position relative to the corresponding second stage air treatment chamber 1282 (e.g., forward) as described with respect to the first stage dirt collection chamber 1321.

[0467] Optionally, the dirt outlet 214 of each second stage air treatment chamber 1282 in the second cleaning stage 1262 may be in communication with a single second stage dirt collection chamber 1322. That is, where one or more second stage air treatment chambers 1282 are present, each second stage air treatment chamber 1282 may share a single common second stage dirt collection chamber 1322. For example, separated dirt particles may be discharged through the dirt outlet 214 of each second stage air treatment chamber 1282 into a single second stage dirt collection chamber 1322 (see e.g., FIGS. 33 to 35, 55, 60, 64, 67 to 69, 72 to 73, 75 to 76, 81, 113, 117, 132, and 142). The single second stage dirt collection chamber 1322 may be at any location relative to the second stage air treatment chambers 1282. For example, the second stage dirt collection chamber 1322 may be below the second stage air treatment chamber(s) 1282 (see e.g., FIGS. 33A, 67 to 69, and 132) and, optionally, at least partially below the first stage air treatment chamber 1281 (see e.g., FIGS. 33B, 81, 113, 117, and 142). Alternatively, the common second stage dirt collection chamber 1322 may be internal to the first stage air treatment chamber 1281. For example, the second stage air treatment chambers 1282 may discharge separated dirt particles into a dirt collection conduit 226 extending through the chamber air outlet of the first stage air treatment chamber 1281 and interior to the porous member 180 (see e.g., FIGS. 55, 60, 64, 72 to 73, 75 to 76). In such embodiments, the airflow path 138 may pass through the screen of the porous member 180 and through the chamber air outlet port 178 in the annular space around the dirt collection conduit 226 defining the common second stage dirt collection chamber 1322.

[0468] Optionally, the dirt outlet 214 of each second stage air treatment chamber 1282 in the second cleaning stage 1262 may be in communication with the dirt collection chamber 132 of the first cleaning stage 1261. That is, the first stage air treatment chamber 1281 and each second stage air treatment chamber 1282 may share a single common dirt collection chamber 132. For example, separated dirt particles may be discharged through the dirt outlet 192 of the first stage air treatment chamber 1281 and through the dirt outlet 214 of each second stage air treatment chamber 1282 into the same dirt collection chamber 132 (see e.g., FIGS. 28 and 29A). Separated dirt particles may be discharged through the dirt outlet 214 of each second stage air treatment chamber 1282 directly into the common dirt collection chamber 132 (see e.g., FIG. 29A) or indirectly through an intervening dirt collection passage leading to the common dirt collection chamber 132 (see e.g., FIG. 28). The dirt collection passage may be through an annular volume around the second stage air treatment chambers 1282 (see e.g., FIG. 81) or through a volume defined between the second stage air treatment chambers 1282 (see e.g., FIG. 28). Dirt particles that enter the dirt collection passage may fall, such as under the force of gravity, into the common dirt collection chamber 132.

[0469] The second cleaning stage 1262 may be emptied by any suitable means. For example, the second stage dirt collection region(s) 1302 and / or dirt collection chamber(s) 1322 may be emptied separately from the first cleaning stage 1261 by any means described with respect to the first cleaning stage 1261. In such embodiments, the first and second cleaning stages 126 may each have independently actuatable emptying means (e.g., openable portions such as described with respect to the front and bottom doors 202, 204), which may be used to empty the first and second cleaning stages 126 in sequence. For example, the second stage dirt collection chamber(s) 1322 may have an independently actuatable bottom door such as described with respect to the bottom door 204 (see e.g., FIGS. 60 and 69), or an independently actuatable front door such as described with respect to the front door 202, which may comprise a rear end of the first cleaning stage 1261 (see e.g., FIG. 116).

[0470] Optionally, the second stage dirt collection chamber(s) 1322 may be emptied simultaneously with the first stage dirt collection chamber(s) 1321. For example, in the example embodiments described herein, opening the front door 202 (see e.g., FIGS. 73, 75, 81, and 113) and / or bottom door 204 (see e.g., FIGS. 58, 68, and 142) of the first stage dirt collection chamber 1321 may concurrently open the first cleaning stage 1261 (e.g., one or both of the first stage air treatment chamber 1281 and the first stage dirt collection chamber 1321) and the second cleaning stage 1262 (e.g., one or both of the second stage air treatment chamber(s) and the second stage dirt collection chamber(s) 1322). In such embodiments, the front door 202 of the first stage dirt collection chamber 1321 may also be an openable portion (e.g., a front door) of, e.g., the second stage dirt collection chamber(s) 1322 (see e.g., FIGS. 73, 81, 113A, and 117). Similarly, the bottom door 204 of the first stage dirt collection chamber 1321 may also be an openable portion (e.g., a bottom door) of, e.g., the second stage dirt collection chamber(s) 1322 (see e.g., FIGS. 58, 113B, 117B, 132, and 142). Alternatively, one of the doors 202, 204 of the first stage dirt collection chamber 1321 may be operatively connected to an openable portion of the second stage dirt collection chamber(s) 1322. In such embodiments, moving the front door 202 between the open and closed positions may concurrently move the openable portion of the second stage dirt collection chamber(s) 1322 (see e.g., FIG. 75) and / or moving the bottom door 204 between the open and closed positions may concurrently move the openable portion of the second stage dirt collection chamber(s) 1322 (see e.g., FIG. 68). As exemplified, a single integral member may concurrently open both stages.General Description of a Suction Motor

[0471] The motor used in the hand vacuum 100 may be of any suitable design and configuration, and ay any location in the air flow path through the surface cleaning apparatus, that is sufficient to impart a desired air flow through the hand vacuum 100. For example, motor may be a suction motor 140 that may include a fan and / or impeller (i.e., a motor and fan assembly), which rotates about a motor axis of rotation 216 to help generate the desired air flow.

[0472] The suction motor 140 may have any orientation within the main body 118. For example, within the main body housing 120, when the hand vacuum 100 is oriented with the upper end 112 above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the motor axis of rotation 228 may be oriented longitudinally horizontally extending in a common direction with the hand vacuum axis 116 (see e.g., FIGS. 2, 7 to 13, 34, 35A, 52, 55, 64, 75, 89, 93, 106, 113, 130, 136, 139, and 142), laterally horizontally (see e.g., FIG. 35B), or vertically (see e.g., FIGS. 46, 60, 72, 79, 81, 117, and 132). Accordingly, within the main body housing 120, the motor axis 228 may be parallel to the hand vacuum axis 116 (i.e., when oriented longitudinally horizontally) or transverse to the hand vacuum axis 116 (i.e., when oriented laterally horizontally or vertically). Alternatively, as described in greater detail subsequently herein, within the handle 122, and when the hand vacuum 100 is oriented with the upper end 112 above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the motor axis 228 may be oriented generally vertically at about the same angle as the handle 122 (see e.g., FIGS. 119 to 121, 123, 125, and 126), or generally horizontally (see e.g., FIG. 142). Any other orientation may be possible.

[0473] As shown in these embodiments, the suction motor 140 may be positioned in the motor housing 142 rearward of the air treatment assembly 124. The motor housing 142 may be positioned in the main body housing 120 or the handle 122 or, alternatively, integrally formed with the main body housing 120 or the handle 122.

[0474] The motor housing 142 may be at any position within the main body housing 120, such as proximate the upper end 112 of the hand vacuum 100 (see e.g., FIGS. 60, 72, 79, 81, 93, and 130), proximate the lower end 114 of the hand vacuum 100 (see e.g., FIGS. 15A, 38, 44, 46, and 47), or at any other location therebetween, such as generally centered therebetween (see e.g., FIGS. 52, 75, 89, 117, 132, and 138). Optionally, at least part of the motor housing 142 may extend rearwardly from the main body housing 120. Accordingly, in embodiments where the motor housing 142 is positioned proximate the upper end 112, at least part of the motor housing 142 may form an upper rearwardly extending portion of the main body 118 (see e.g., FIGS. 33A to 33B, 40, 43, 55, and 64). Similarly, in embodiments where the motor housing 142 is positioned proximate the lower end 114, at least part of the motor housing 142 may form a lower rearwardly extending portion of the main body 118 (see e.g., FIGS. 2, 7 to 13, 15B, 16, 39, 41, 42, 45, 106, 113, and 136).

[0475] The motor housing 142 may be at any position within the handle 122, such as within a hand grip portion 232, 234, a lower member 240, or a finger guard 241 of the handle 122. For example, in the embodiments illustrated in FIGS. 119 to 121, 123, 125, 126, and 142, the motor housing 142 is part of the finger guard 241.General Description of a Pre-Motor Filter

[0476] Optionally, one or more pre-motor filters 148 may be provided in the hand vacuum 100 at any position in the airflow path 138 downstream from the air treatment chamber(s) 128 of the final cleaning stage 126 and upstream from the suction motor 140.

[0477] For example, the pre-motor filter 148 may be positioned in the pre-motor filter housing 152 in the main body 118 rearward of the air treatment assembly 124 (see e.g., FIG. 2) or above the air treatment assembly (see e.g., FIGS. 55 and 60). Optionally, the pre-motor filter 148 may be positioned annularly around the suction motor 140 with the suction motor 140 partially or fully nested therein such that the motor housing 142 may also be the pre-motor filter housing 152. This configuration may advantageously provide a more compact hand vacuum 100.

[0478] Alternatively, the pre-motor filter 148 may be positioned in the air treatment assembly 124, such as fully nested in the porous member 180 of the air treatment chamber 128 of any cleaning stage 126, fully nested between a plurality of air treatment chambers 128 of any cleaning stage 126 (see e.g., FIGS. 112 to 113), in the air outlet duct 208 outward of the air treatment chamber 128, or below the air treatment chamber 128 (see e.g., FIGS. 36 to 37). As shown in FIGS. 36 and 37, where the pre-motor filter 148 is below the air treatment chamber 128, the pre-motor filter housing 152 may be positioned below the air treatment chamber 128 (and optionally above the dirt collection chamber 132) and in communication with the air treatment chamber 128 via the air outlet duct(s) 208.

[0479] Further alternatively, the pre-motor filter 148 may be positioned partially in the main body 118 and partially in the air treatment assembly 124. For example, the pre-motor filter 148 may extend from within the main body housing 120 through the chamber air outlet to be partially nested in the porous member 180 of the air treatment chamber 128 or to be partially nested between a plurality of air treatment chambers 128 (see e.g., FIGS. 81 to 82). Similarly, the pre-motor filter 148 may extend between the portion of the air outlet duct 208 in / along the main body 118 and the portion of the air outlet duct 208 along the air treatment chamber 128.

[0480] If the air treatment assembly is removable, then the pre-motor filter 148 may be removable with the air treatment assembly 124 and a rear end of the air treatment assembly may house the pre-motor filter 148. Alternatively, the pre-motor filter 148 may remain in place when the air treatment assembly 124 is removed, and a forward end of the main body 118 may house the pre-motor filter 148.

[0481] The pre-motor filter 148 may be formed from foam or any other suitable physical, porous filter media. For example, the pre-motor filter 148 may be formed from cloth or paper, such as a pleated filter (see e.g., vertically pleated filter of FIGS. 142 to 143 and horizontally pleated filter of FIGS. 144 to 145). Optionally, a felt filter layer can be provided on one side of the pre-motor filter 148, and preferably is positioned adjacent the downstream side (see e.g., FIGS. 28 and 29A) but may be provided on the upstream side.

[0482] The pre-motor filter 148 may have any suitable shape, such as cylindrical (see e.g., FIGS. 2, and 112 to 113), frusto-conical (see e.g., FIGS. 72 to 73, and 79 to 82), rectangular (see e.g., FIGS. 28, 29A, 33, and 37) or a generally flat, slab-like filter (see e.g., FIG. 64). Any such shape may optionally include pleats to increase the surface area of the pre-motor filter 148 (see e.g., rectangular pleated filters in FIGS. 142 to 145). Optionally, the pre-motor filter 148 may be provided with an internal air inlet into which the airflow enters and passes through the pre-motor filter 148 radially outwardly. In such embodiments, the internal air inlet may be sealed to the air outlet of any cleaning stage, such as the only cleaning stage 126 (see e.g., FIGS. 52 to 53) or the second cleaning stage 1262. Alternately, the pre-motor filter 148 may optionally be provided with an internal air outlet out of which the airflow exits after passing through the pre-motor filter 148 radially inwardly (see e.g., FIGS. 79 to 81, 122, 123, 125, and 126). In such embodiments, the internal air outlet may optionally be sealed to the air inlet of the suction motor 140 (see e.g., FIGS. 72 to 73).

[0483] The pre-motor filter 148 may be removed from the hand vacuum 100 such as for cleaning, inspection, replacement, and the like. The pre-motor filter 148 may be removed by any suitable means such as, for example, through a sidewall of the hand vacuum 100. For example, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the pre-motor filter 148 (and optionally the pre-motor filter housing 152) may be withdrawn from the hand vacuum 100 through the main body housing 120 at the upper end 112 of the hand vacuum 100 (i.e., in the upward direction; see e.g., FIGS. 74, 88, 118, and 137), at the lower end 114 (i.e., in the downward direction), at the rear end 110 (i.e., in the rearward direction; see e.g., FIGS. 72 to 73, and 81 to 82), at the front end 108 (i.e., in the forward direction; see e.g., FIGS. 55 and 60), or at a lateral side (i.e., in the lateral direction; see e.g., FIGS. 28, 67 to 69, 105 to 106, and 135 to 136). Alternatively, the pre-motor filter 148 may be exposed within the hand vacuum 100 for removal, such as by moving (e.g., pivoting, translating) all of the air treatment assembly 124 (see e.g., FIGS. 2, 79 to 80, and 142) or a portion of the air treatment assembly 124 (see e.g., FIG. 52) relative to the main body 118, or removing the air treatment assembly 124 from the main body 118 (see e.g., FIGS. 91 to 92, 111 to 113, 114 to 117, and 132 to 134).General Description of a Post-Motor Filter

[0484] Optionally, one or more post-motor filters 150 may, alternatively or in addition to the pre-motor filter 148, be provided in the hand vacuum 100. The post-motor filter 150 may be at any position in the airflow path 138 downstream from the suction motor 140. For example, post-motor filter 150 may be positioned in the post-motor filter housing 154 in the main body 118 forward of the suction motor 140, (see e.g., FIGS. 47 and 60), rearward of the suction motor 140 (see e.g., FIGS. 45, 125), above the suction motor 140 (see e.g., FIG. 130), annularly around part or all of the axial length of the suction motor (see e.g., FIGS. 33 to 35, 52 to 53, 55, 67 to 69, 72 to 73, 75 to 76, 89 to 90, and 138) or partially annularly (see e.g., FIGS. 60 and 64) around part or all of the axial length of the suction motor 140 as described with respect to the pre-motor filter 148, and / or in the handle 122.

[0485] The post-motor filter 150 may be a physical foam media filter or may be any other suitable physical porous filter media, including, for example, a felt filter, a HEPA filter, a paper filter, other physical filter media, an electrostatic filter, and the like.

[0486] The post-motor filter 150 may have any suitable shape, such as cylindrical, or a generally flat, slab-like filter. Optionally, the post-motor filter 150 may be provided with an internal air inlet into which the airflow enters and passes through the post-motor filter 150 radially outwardly. The internal air inlet may be sealed to the air outlet of the suction motor 140 (see e.g., FIG. 47). Alternately, the post-motor filter 150 may optionally be provided with an internal air outlet out of which the airflow exits after passing through the post-motor filter 150 radially inwardly (see e.g., FIG. 45). The internal air outlet may be sealed to the clean air outlet 136.

[0487] The post-motor filter 150 may be removed from the hand vacuum 100 such as for cleaning, inspection, replacement, and the like. The post-motor filter 150 may be removed by any suitable means as described with respect to the pre-motor filter 148.General Description of a Clean Air Outlet

[0488] The clean air outlet 136 may be provided as part of the main body 118. As exemplified in the embodiment illustrated in FIG. 1, the clean air outlet 136 may include a grill 230 through which clean air may exit the hand vacuum 100 (see also e.g., FIGS. 32, 52, 54, 59, 63, 68, 74, 88, 91, 118, 137, and 140). The grill 230 may be oriented such that exiting air travels generally upwardly, generally laterally outwardly, and / or at an inclined angle generally rearwardly from the hand vacuum 100. Such directional air flow may beneficially avoid the exhaust airflow impacting the user or the surface to be cleaned.

[0489] The clean air outlet 136 may be at any position rearward of the dirty air inlet 134. For example, the clean air outlet 136 may be provided proximate the rear end 110 (see e.g., FIGS. 1, 32, 52, 54, 63, 68, 74, 88, 91, and 137), proximate the front end 108 (see e.g., FIG. 59), or any other location therebetween. Additionally, the clean air outlet 136 may be at any position between the upper and lower ends 112, 114 of the hand vacuum 100. For example, the clean air outlet 136 may be provided through the main body housing 120 at the lower end 114 (see e.g., FIGS. 1, 52, and 68), through the main body housing 120 at the upper end 112 (see e.g., FIGS. 32, 54, 59, 63, 74, 125, and 130). Any other location between the upper and lower ends 112, 114 may be possible, such as through the main body housing 120 at the rear end 110 or at a lateral side (see e.g., FIGS. 88 and 91). Alternatively, where the airflow path 138 passes through the handle 122, the clean air outlet 136 may be provided in a portion of the handle 122, such as a hand grip portion 232, 234, a lower member 240, or a finger guard 241 thereof (see e.g., FIGS. 118 and 140).General Description of a Handle

[0490] The hand vacuum 100 may include any suitable type of carry handle 122, which may be part of the main body 118. The handle 122 may be located proximate the rear end 110 of the hand vacuum 100. Additionally, or alternatively, the handle 122 may be located proximate the upper end 112 of the hand vacuum 100.

[0491] The handle 122 may have one or more hand grip portions. For example, the handle 122 may be a multi-grip handle (see e.g., FIGS. 1, 28, 38, 39, 44, 46, 47, 105, 111, and 135). As shown in the illustrated embodiments, the multi-grip handle 122 may have an upper grip portion 232 and a pistol grip portion 234. Optionally, the multi-grip handle 122 may also have a lower grip portion (not shown) opposite the upper grip portion 232. The user may grip any of the hand grip portions to carry and manipulate the hand vacuum 100. In this way, the multiple hand grip portions may enable the user to hold the hand grip portion 232, 234 most comfortable according to the user's preference and / or suitable for the mode of operation. This may vary depending on the angle at which the user wishes to hold the hand vacuum 100 during operation and / or the direction the dirty air inlet faces during operation.

[0492] As shown, a forward end of the upper grip portion 232 may be connected to the main body housing 120 proximate the upper end 112 of the hand vacuum 100 directly or by an upper bridge portion. The upper grip portion 232 may extend generally rearwardly from the main body housing 120 along an upper grip axis 236. That is, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the upper grip axis 236 may form an acute upward or downward angle from horizontal. The angle can be any suitable angle, such as between about 5° and 75° (e.g., between 5° and 60°, or between 5° and) 45°. For example, in the illustrated embodiments, the upper grip axis 236 of the upper grip portion 232 is forming a downward angle of about 10° from horizontal. Any angle of the upper grip axis 236 may be possible.

[0493] An upper end of the pistol grip portion 234 may be connected to a rearward end of the upper grip portion 232. The pistol grip portion 234 may extend generally downwardly from the upper end of the pistol grip portion 234 along a pistol grip axis 238. That is, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the pistol grip axis 238 may form an acute forward or rearward angle from vertical. The angle can be any suitable angle, such as between about 5° and 75° (e.g., between 5° and 60°, or between 5° and) 45°. For example, in the embodiments illustrated, the pistol grip axis 238 of the pistol grip portion 234 is forming a forward angle of about 15° from vertical. Any angle of the pistol grip axis 238 may be possible.

[0494] A lower end of the pistol grip portion 234 may optionally be connected to a lower rearward portion of the main body housing 120 proximate the lower end 114 of the hand vacuum 100 (see e.g., FIGS. 2, 38, 39, 46, 47, 106, 113, and 135). Optionally, the lower end of the pistol grip portion 234 may be connected to the main body housing 120 by a lower bridge (see e.g., FIGS. 28, 48). Optionally, the lower end of the pistol grip portion 234 may be unconnected to any portion of the hand vacuum 100 (see e.g., FIG. 44).

[0495] Alternatively, the lower end of the pistol grip portion 234 may be connected to a rearward end of the lower grip portion, if present. A forward end of the lower hand grip portion may be connected to the main body housing 120 proximate the lower end 114 of the hand vacuum 100 directly or by a lower bridge portion. The lower grip portion may extend generally rearwardly from the main body housing 120 along a lower grip axis configured similarly to as described with respect to the upper grip portion 232. The lower hand grip portion may enable, for example, inverted operation of the hand vacuum 100 (i.e., with the lower end 114 disposed above the upper end 112).

[0496] Optionally, the handle 122 may include only one of the hand grip portions. For example, the handle 122 of the hand vacuum 100 may have only the upper grip portion 232 (see e.g., FIGS. 45 and 50). As shown, in such embodiments, the upper grip portion 232 may be configured as described previously, with the rearward end of the upper grip portion 232 unconnected to any portion of the hand vacuum 100 (i.e., akin to a wand-style handle).

[0497] Alternatively, the handle 122 of the hand vacuum 100 may be a pistol grip handle having only the pistol grip portion 234 (see e.g., FIGS. 32, 40, 41, 42, 55, 59, 63, 70, 74, 78, 88, 91, 117, 118, 132, 137, and 142). In such embodiments, the upper end of the pistol grip portion 234 may be connected to an upper rearward portion of the main body housing 120 (see e.g., FIGS. 32, 40, 41, 43, 55, and 63) or an upper bridge (see e.g., FIGS. 42, 59, 117, 132, and 142) proximate the upper end 112 of the hand vacuum 100 or, alternatively, directly to the main body housing 120 (see e.g., FIGS. 70, 74, 78, 88, 91, 118, and 137). Similar to as described with respect to the multi-grip handle, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the pistol grip axis 238 may form an acute forward or rearward angle from vertical. For example, in the embodiments illustrated, the pistol grip axis 238 of the pistol grip portion 234 is forming a rearward angle of about 15° from vertical. Any angle of the pistol grip axis 238 may be possible.

[0498] If the handle 122 is a pistol grip handle, the lower end of the pistol grip portion 234 may be configured as described previously. That is, the lower end may optionally be connected to the lower rearward portion of the main body housing 120 (see e.g., FIGS. 40, 41, 42, 43, 55, and 59) or the lower bridge (see e.g., FIGS. 32, 117, and 132) proximate the lower end 114 of the hand vacuum 100 or, alternatively, unconnected to any portion of the hand vacuum 100. In some embodiments where the lower end of the pistol grip portion 234 is unconnected to any portion of the main body housing 120, the handle 122 may optionally include a lower member 240 connected to the lower end of the pistol grip portion 234 (see e.g., FIGS. 63, 70, 74, 78, 88, 91, 118, 137, and 140). The lower member 240 may function as a stand for the hand vacuum 100. Additionally, or alternatively, the lower member 240 may function as the energy storage member housing 146 for one or more energy storage members 144 (see e.g., FIGS. 64, 119 to 126, 138, and 142).

[0499] Optionally, if the handle 122 is a pistol grip handle including the lower member 240, the handle 122 may further include a finger guard 241. The finger guard 241 may be located forward of the pistol grip portion 234 of the handle 122 and extend from the lower member 240 to, e.g., the air treatment assembly 124 or main body 118 at the lower end 114 of the hand vacuum 100. In such embodiments, the finger guard 241 may advantageously protect the user's fingers while gripping the pistol grip portion 234. The finger guard 241 may further advantageously provide additional space within the hand vacuum 100 in which to house various components such as the suction motor 140 (see e.g., FIGS. 119, 120, 121, 123, 125, 126, and 142) or energy storage member 144 (see e.g., FIG. 130), for example. Further, in some embodiments, the finger guard 241 may function as a conduit forming a portion of the airflow path 138 (see e.g., FIGS. 119, 121, 123, 125, 126, and 142).

[0500] In some embodiments, the upper rearward portion of the main body housing 120 may optionally be one or more of the motor housing 142 (see e.g., FIGS. 33A to 33B, 40, 43, 55, and 64), the energy storage member housing 146 (see e.g., FIG. 41), the pre-motor filter housing 152, and the post-motor filter housing 154 (see e.g., FIGS. 33A to 33B, and 64). Accordingly, one or more components of the hand vacuum 100 may be at the upper end of the handle 122. Where the handle 122 is a pistol grip handle, the one or more components may be at the upper end of the pistol grip portion 234 such that the pistol grip axis 238 intersects at least one component in the upper rearward portion (see e.g., FIGS. 33A to 33B, 40, 41, 43, 55, and 64).

[0501] Similarly, in some embodiments, the lower rearward portion of the main body housing 120 may optionally be one or more of the motor housing 142 (see e.g., FIGS. 2, 39, 41, 42, 45, 106, 113, and 136), the energy storage member housing 146 (see e.g., FIGS. 38, 39, 40, 46, 47, 55, and 60), the pre-motor filter housing 152, and the post-motor filter housing 154 (see e.g., FIGS. 42 and 45). Accordingly, one or more components of the hand vacuum 100 may be at the lower end of the handle 122. Where the handle 122 is a pistol grip handle, the one or more components may be at the lower end of the pistol grip portion 234 such that the pistol grip axis 238 intersects at least one component in the lower rearward portion (see e.g., FIGS. 40, 41, 42, 55, and 60).

[0502] In some embodiments, a finger gap 242 for receiving the fingers of a user may be formed between the upper grip portion 232 and / or the pistol grip portion 234 of the handle 122 and the main body housing 120 (see e.g., FIGS. 1, 28, 32, 38 to 47, 54, 59, 63, 106, 111, 117, 119, 121, 123, 125, 126, 130, 132, 136, and 140). That is, as shown in these embodiments, depending on the configuration of the main body housing 120 and the handle 122, the finger gap 242 may be bounded, at least in part, by three or more of the upper grip portion 232, the pistol grip portion 234, the upper bridge, the lower bridge, and the main body housing 120 at the rear end 110 of the hand vacuum 100, the upper rearward portion, the lower rearward portion, and the lower member 240 and finger guard 241. Optionally, the finger gap 242 may be unbounded at one of a lower end (see e.g., FIG. 44) and a rearward end (see e.g., FIG. 45) thereof.

[0503] It will be appreciated that any one or more of the hand grip portions may be arcuate as exemplified or may extend linearly, e.g., a grip axis may extend centrally through the grip portion (e.g., pistol grip portion 234) from a first end of the grip portion (e.g., a lower end of pistol grip portion 234) to an opposed end of the grip portion (e.g., an upper end of pistol grip portion 234).General Description of a Power Supply

[0504] Optionally, the hand vacuum 100 may be powered by an electrical cord. In such embodiments, the suction motor 140 may run on AC power supplied from a wall socket. Alternatively, or in addition to being powered by an electrical cord, the hand vacuum 100 may include one or more onboard power sources. If both an electrical cord and one or more onboard power sources are present, the power cord may optionally be detachable from the hand vacuum 100.

[0505] The onboard power sources may be one or more energy storage members 144 of any suitable type, including, for example one or more batteries, such as solid-state batteries, and / or one or more capacitors, such as super capacitors or ultra capacitors. Optionally, if the one or more energy storage members 144 are batteries, the batteries may be rechargeable (e.g., via an electrical cord that electrically connects the hand vacuum 100 to household mains, or when docked to a docking station). Alternatively, the batteries may be replaceable, non-rechargeable batteries. Additionally, or alternatively, the one or more onboard power sources (i.e., batteries or capacitors) may be provided in a removable housing, such as a removable battery pack, for recharging and / or replacement.

[0506] If the energy storage member(s) 144 is / are a battery pack, each battery pack may include any suitable number of cells, and may include, for example, 3 cell 18560 lithium ion batteries. If two battery packs are connected in series, they may create a 6 cell 22V Li-ion power source. Any number of cells may be used to create a power source having a desired voltage and current, and any type of battery may be used, including NiMH, alkaline and the like.

[0507] Each energy storage member 144 may be positioned in an energy storage member housing 146, which may be rearward of and / or below the air treatment assembly 124. Each energy storage member housing 146 may be positioned in, or integrally formed with, the main body housing 120.

[0508] The energy storage member 144 used in the hand vacuum 100 may be provided at a single location. For example, the energy storage member 144 may be provided as one large battery pack (see e.g., FIGS. 2, 14, 28, 29A, 33A to 33B, 36, 38, 39, 40, 41, 42, 43, 45, 47, 48, 52 to 53, 55, 60, 64, 72 to 73, 75, 79, 81, 89 to 90, 93 to 94, 106 to 107, 113, 119, 121, 125, 130, 136, 138, and 142). Alternatively, multiple energy storage members 144 may be provided in multiple locations within the hand vacuum 100. For example, the energy storage members 144 may be provided as multiple smaller battery packs at different locations, which may be removable individually or concurrently (see e.g., FIGS. 44, 46, 47, 67 to 69, 117, and 132).

[0509] The energy storage member 144 may be provided at any position within the main body housing 120, such as proximate the upper end 112 of the hand vacuum 100 (see e.g., FIGS. 36, 45, 67 to 69, 106 to 107, 117, and 136), proximate the lower end 114 of the hand vacuum 100 (see e.g., FIGS. 33A to 33B, 42, 67 to 69, and 117), or at any other location therebetween. Alternatively, the energy storage member 144 may be provided at any position within the handle 122, such as within the upper grip portion 232 (see e.g., FIGS. 28, 29A, 44, 47, and 52 to 53), the pistol grip portion 238 (see e.g., FIGS. 43, 44, and 48), the lower grip portion, the lower member 240 (see e.g., FIGS. 64, 72 to 73, 75, 79, 81, 89 to 90, 93 to 94, 119, 121, 125, 126, 138, and 142), or the finger guard (see e.g., FIG. 130).

[0510] Optionally, at least part of the energy storage member housing 146 may extend rearwardly from the main body housing 120. Accordingly, in embodiments where the energy storage member housing 146 is positioned proximate the upper end 112, at least part of the energy storage member housing 146 may form the upper rearward portion of the main body 118 (see e.g., FIG. 41). Similarly, in embodiments where the energy storage member housing 146 is positioned proximate the lower end 114, at least part of the energy storage member housing 146 may form the lower rearward portion of the main body 118 (see e.g., FIGS. 2, 14, 38, 39, 40, 47, 55, 60, and 113). Alternatively, at least part of the energy storage member housing 146 may extend rearwardly from the main body housing 120 into the upper grip portion 232 or the lower grip portion such that the energy storage member 144 is partially nested in both the main body housing 120 and the handle 122 (see e.g., FIG. 46).

[0511] As shown in various ones of these embodiments, any number of energy storage members 144 may be provided in any one location or combination of two or more of locations described previously within the main body housing 120 and the handle 122. Any additional location(s) within the hand vacuum 100 other than those described may be possible.

[0512] Positioning energy storage members 144 at two or more locations may help distribute the weight of the batteries and may affect the hand feel and / or perceived balance of the hand vacuum 100. Optionally, if the energy storage members 144 are provided in multiple locations within the hand vacuum 100, the energy storage members 144 may be positioned generally opposite each other on opposite sides of a central plane extending along the hand vacuum axis 116 of the hand vacuum 100. For example, one energy storage member 144 may be positioned toward the upper end 112 of the hand vacuum 100 and another energy storage member 144 may be positioned toward the lower end 114 (see e.g., FIGS. 44, 46, 47, 67 to 69, 117, and 132). Similarly, the energy storage members 144 may be positioned toward opposed lateral sides of the hand vacuum 100 (see e.g., FIGS. 86A to 86B), such as on opposed lateral sides around the suction motor 140 (see e.g., FIGS. 2, 14, 39, and 113). In this way, the weight of one energy storage member 144 may at least partially offset / counterbalance the weight of the opposing energy storage member 144. This may help reduce the torque experienced by the user while manipulating the orientation of the hand vacuum 100 during use.

[0513] The energy storage member(s) 144 may have any orientation within the main body housing 120 and / or the handle 122. For example, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, a long dimension of the energy storage member(s) 144 may extend horizontally (i.e., forwardly / rearwardly or laterally), vertically, or any combination thereof. For example, in the embodiment illustrated in FIGS. 140 to 145, some of the energy storage members 144 are oriented laterally horizontally (the forward four batteries exemplified in FIG. 144) and some of the energy storage members 144 are oriented forwardly / rearwardly horizontally (the rearward battery as exemplified in FIG. 144).

[0514] Additionally, or as an alternative to the energy storage members 144 being onboard power sources, one or more energy storage members 144 may optionally be provided within the wand 104, the surface cleaning head 106, and other accessories. The energy storage member(s) 144 in the wand 104 and / or the surface cleaning head 106 may provide some additional power when the hand vacuum 100 is connected to the wand 104 and / or to the surface cleaning head 106 via the wand 104. For example, the additional power from the energy storage member(s) 144 in the wand 104 and / or the surface cleaning head 106 may be used to help power one or more electrically powered components in the surface cleaning head and / or wand, such as one or more of a motor and fan assembly (e.g., a dirty air motor), a brush motor, lights, or other such features that require power in the surface cleaning head 106. Optionally, all of the energy storage members 144 can provide at least some power to the suction motor 140 and, optionally, one or more electrically powered components in the surface cleaning head and / or wand. This may help provide longer run times, higher suction levels or both as compared to only using the power supplied from the hand vacuum 100. The additional mass of the energy storage member(s) 144 in the wand 104 and / or the surface cleaning head 106 may also advantageously be left behind when a user detaches the hand vacuum 100 for above floor cleaning. Accordingly, a desired level of power may be provided when operating in an above-floor cleaning mode and a floor cleaning mode.General Description of an Electrical Connector

[0515] As described previously, in addition to functioning as a nozzle, the air inlet conduit 156 can be directly connected to the downstream end of the wand 104 or any suitable accessory tool such as a crevice tool, a mini brush or the like. The air inlet conduit 156 may also be or indirectly connected to any such accessory tool via the wand 104. Optionally, the hand vacuum 100 can include an electrical connector 244 provided proximate the front end 108, such as adjacent the air inlet conduit 156 (see e.g., FIGS. 1, 50, 54, 59, 63, 70, 78, 111, 114, 118, and 140), which may place the hand vacuum 100 in electrical communication with the accessory tool or the wand 104 upon mechanically connecting the accessory tool or the wand to the hand vacuum 100.

[0516] In such embodiments, the downstream end of the accessory tool or the wand 104 can include another electrical connector detachably matingly connectable to the electrical connector 244 of the hand vacuum 100. The electrical connectors 244 may be of any suitable configuration, such as mating pins and sockets. Power can thereby be communicated directly between the hand vacuum 100 and the accessory tool or indirectly between the hand vacuum 100 and the accessory tool or the surface cleaning head 106 via the wand 104.

[0517] Power may be supplied from the energy storage members 144 and / or electrical cord of the hand vacuum 100 to the electrical connector 244 via wiring 246. The path of the wiring 246 may depend, for example, on the relative positioning of the power supply and the electrical connector 244. For example, the path of the wiring 246 (which is generally shown in stippled lines) from the power supply to the electrical connector 244 may pass through (i.e., internal to) any portion of the main body 118 such as the handle 122 and / or the main body housing 120. The wiring 246 may further pass through one or more portions of the air treatment assembly 124 such as the air treatment chamber 128 and / or the dirt collection chamber 132 of any cleaning stage(s) 126. The wiring 246 may then pass from within the air treatment assembly 124 through an external post 248 extending along an exterior of the air inlet conduit 156 to the electrical connector 244 (see e.g., FIGS. 2, 28, 55, 60, and 64). Alternatively, the path of the wiring 246 may bypass the interior volume of the air treatment assembly 124. For example, the wiring 246 may pass from within the main body housing 120 and through an external post 248 extending along an exterior of the air treatment assembly 124 and the air inlet conduit 156 to the electrical connector 244 (see e.g., FIGS. 52, 67 to 69, 73, 79, 81, 113, 117, and 118).

[0518] Similarly, power may be supplied from the energy storage members 144 and / or electrical cord of the hand vacuum 100 to other electrical components such as the suction motor 140, a user interface, lights, and the like, via wiring 246.General Description of Various Modes of Operation

[0519] Referring to FIG. 5, the hand vacuum 100 may be configured so that the air inlet conduit 156 may be directly mechanically, and optionally electrically (as described previously), connected to the upper end of the wand 104. Referring to FIG. 6, the lower end of the wand 104 may be mechanically, and optionally electrically (i.e., via electrical connectors similar to as described previously), connected to the surface cleaning head 106. The lower end of the wand 104 may also be pivotally, and optionally steeringly, connected to the surface cleaning head 106. In this arrangement, the handle 122 can be used to manipulate the hand vacuum 100 when detached from the wand 104, and can be used to manipulate the combination of the hand vacuum 100 and the wand 104, or the combination of the hand vacuum 100, wand 104, and surface cleaning head 106 (i.e., the stickvac), depending on the mode in which the hand vacuum 100 is used. The wand 104 may be any suitable member that can provide the desired structural connection and airflow communication between the hand vacuum 100 and the surface cleaning head 106 (e.g., a rigid airflow conduit).

[0520] Optionally, the hand vacuum 100 can be detachably connected to the upper end of the wand 104, for example using a latch. Similarly, the lower end of the wand 104 can optionally be removably connected to the surface cleaning head 106. Providing detachable connections at both ends of the wand 104 may enable use of the hand vacuum 100 in at least three modes of operation. That is, the hand vacuum 100 can be used (i) independently in a first above-floor cleaning mode using the air inlet conduit 156 to clean a surface (i.e., in the configuration shown in e.g., FIG. 1); (ii) connected to the wand 104 in a second above-floor cleaning mode using the lower end of the wand 104 to clean a surface (i.e., in the configuration shown in FIG. 5); and (iii) connected to both the wand 104 and the surface cleaning head 106 in an upright cleaning mode using the surface cleaning head 106 to clean a surface (i.e., in the configuration shown in FIG. 6).

[0521] In the first and second above-floor cleaning modes, the hand vacuum 100 can be used for cleaning (e.g., furniture, countertops, etc.) and cleaning hard to reach areas (e.g., along baseboards, ceilings, stairs, etc.). Optionally, accessory tools such as crevice tools, mini brushes (e.g., manual or motorized), hoses, and the like can be removably connected to the air inlet conduit 156 or wand 104 to facilitate the above-floor cleaning modes. In the upright cleaning mode, the hand vacuum 100 can be used to clean a floor or other surface in a manner analogous to a conventional upright-style vacuum cleaner.General Description of a User Interface

[0522] The hand vacuum 100 may include one or more user interfaces. Each user interface may be a display screen, a control switch, a power switch, and the like. For example, each user interface may provide information display, function control, or both. If more than one user interface is provided, the user interfaces may be of the same or different types. For example, a first user interface may be a display screen and a second user interface may be a control switch or a power switch.

[0523] Additionally, If more than one user interface is provided, the user interfaces may be interrelated or separate. For example, information displayed on a first user interface (i.e., a display screen) may be controlled by a related second user interface (i.e., a control switch) and / or correspond to the function of the hand vacuum 100 controlled by the related second user interface (i.e., a control switch or a power switch). As another example, the first user interface may provide information display and / or function control for one or more functions of the hand vacuum 100 and the second user interface may provide information display and / or function control for one or more different functions of the hand vacuum 100.

[0524] Optionally, the user interface of the hand vacuum 100 may include one or more information display devices to provide information to a user. For example, the hand vacuum 100 may include one or more lights to indicate when the suction motor is on, its current power level (e.g., hi or low, if applicable), battery charge level, and the like. The display screen 250, and associated electronics, may be used to display status information. Optionally, the information display device may be connectable to other apparatuses. For example, if the hand vacuum 100 is connected to a different apparatus, such as an accessory tool, the wand 104, and / or surface cleaning head 106, the information displayed may be customized for each type of apparatus connected to the hand vacuum 100. That is, the information display device may optionally be communicatively connected to whatever apparatus is connected to the hand vacuum 100 (e.g., via the electrical connector 244) such that it may detect the type of apparatus connected. The information display devices may include one or more display screens 250, such as an LCD display, LED screen, OLED screen, and the like. Accordingly, the display screen 250 may be configured to show information about whatever apparatus is connected to the hand vacuum 100 (e.g., brush motor of a surface cleaning head on or off), so that the same screen can be used for multiple apparatuses. This may reduce the need to provide screens or the like on each separate apparatus that can be connected to the hand vacuum 100.

[0525] The display screen 250 may be provided on the hand vacuum 100 at any location suitable for allowing the user to monitor the status information displayed on the screen 250. For example, the display screen 250 may be provided at the rear end 110 of the hand vacuum 100, such as on the main body housing 120 at the upper end 112 (see e.g., FIGS. 42, 44 to 47, 50, 59, 114, and 132) or the rear end 110 (see e.g., FIGS. 33A, 40, 41, 43, 55, 64, 72, 75, 79, 81, 89, 93, 118, and 138) of the hand vacuum 100, on the upper end of the handle 122 (see e.g., FIGS. 1, 38, 39, 105, 111, 135, and 140), or any other suitable location.

[0526] Optionally, the user interface of the hand vacuum 100 may include one or more control / power switches 252 (referred to generally herein as power switches). The power switches 252 may control any function of the hand vacuum 100, such as operation of the suction motor 140 (e.g., on / off, variable power levels, or both). For example, a power switch 252 may be operable to establish a power connection between the energy storage members 144 and the suction motor 140. Similarly, the same power switch 252 or a different one may optionally be operable to establish a power connection between the energy storage members 144 and lights or a brush motor of the hand vacuum 100.

[0527] Optionally, a power switch 252 may also be configured to control other powered devices connectable to the hand vacuum 100. For example, the power switch 252 may be operable to control both the suction motor 140 of the hand vacuum 100 and the brush motor and / or lights of the surface cleaning head 106 and / or any other electrified elements provided on the wand 104, surface cleaning head 106, or any other tool or attachment. Alternatively, the power switch 252 may be operable to control some functions of the hand vacuum 100 only, and one or more additional power switches 252 may be operable to control the different functions of the powered devices connectable to the hand vacuum 100.

[0528] The one or more power switches 252 can be provided on the hand vacuum 100 at any suitable location(s), which may be the same or different locations. The power switch 252 may be provided on or near the handle 122 such that it can be actuated by a finger (e.g., thumb or index finger) of the user on the same hand as is holding the handle 122. For example, the power switch 252 may be provided on the upper grip portion 232 (see e.g., FIGS. 1, 50, 106, 111, and 135) or pistol grip portion 234 (see e.g., FIGS. 63, 70, 74, 78, and 140) of the handle 122. This may allow true one-handed operation of the hand vacuum 100.

[0529] Optionally, or in addition to being provided on the handle 122, the power switch 252 may be provided on the main body 118 at a location generally proximate to the handle 122 so that the switch 252 can be operated using the same hand that is holding the handle 122 or, alternatively, by the other hand of the user. For example, the power switch 252 may be provided on the main body housing 120 at the upper end 112 of the hand vacuum 100 (see e.g., FIGS. 28, 59, and 140) or at the rear end 110 of the hand vacuum 100 (see e.g., FIGS. 33, 55, 89, 93, 114, and 138) proximate to the handle 122.

[0530] Optionally, if more than one user interface is provided (i.e., two or more display screens 250, two or more power switches 252, or one or more display screens 250 and one or more power switches 252), the user interfaces may be provided at any combination of locations described herein. For example, in the embodiment illustrated in FIG. 140, the hand vacuum 100 includes a first user interface provided at the upper end 112 of the hand vacuum 100 on the upper bridge portion above the handle 122 and a second user interface is provided at the upper end of the handle 122 on the pistol grip portion 234.

[0531] The power switch 252 can be provided in any suitable configuration. For example, the power switch 252 may be a button (see e.g., FIGS. 1, 111, 114, and 140), a rotary switch, a sliding switch (see e.g., FIGS. 50, 106, and 136), a trigger-type actuator (see e.g., FIGS. 63, 70, 74, 78, and 118), and the like. Optionally, the display screen 250 may be a touch screen, and the power switch 252 can be provided as a touch button in the display screen 250 (see e.g., FIGS. 28, 33, 55, 59, 89, 93, 138, and 140).

[0532] Optionally, the hand vacuum cleaner 100 may be configurable in two or more different operating modes having different power profiles. For example, the suction motor 140 in the hand vacuum 100 may be operable at a low power mode and a high-power mode, each providing different levels of suction and air flow through the hand vacuum 100. In some embodiments, switching between such power modes may be done manually by a user using the power switch 252. In other embodiments, switching between such power modes may be done automatically based on the configuration or operation of the hand vacuum. In other embodiments, the hand vacuum 100 may automatically change power modes, but may also include a manual option for a user to override the automatic changes.General Description of a Docking Station

[0533] Referring to FIG. 83, as exemplified, the hand vacuum 100 may be docked at a docking station 254 for emptying and / or recharging the energy storage members 144 (if any). As exemplified, the docking station 254 may include a station base 256 and a station conduit 258 extending upwardly from the station base 256. The hand vacuum 100 may be docked to the docking station 254 at an upper end of the station conduit 258. The hand vacuum 100 may be docked to the docking station 254 alone. Alternatively, the station conduit 258 may optionally extend to an elevation sufficient such that the hand vacuum 100 may dock at the docking station 254 while attached to the wand 104 or, as shown, the wand 104 and surface cleaning head 106.

[0534] When docked to the docking station 254, the hand vacuum axis 116 of the hand vacuum 100 may have any orientation. For example, the hand vacuum axis 116 may be generally vertically oriented (as shown), generally horizontally oriented, or at any other orientation. This may depend, for example, on the location of the docking station door(s) of the hand vacuum 100. For example, if the front door 202 is an automatic emptying door (see e.g., FIGS. 84, 89 to 90, and 138 to 139) and / or the front wall 196 of the dirt collection chamber 132 includes a separate automatic emptying door 206 (see e.g., FIGS. 20A to 20B, 20C to 20D, and 86), the hand vacuum axis 116 may be generally vertically oriented when docked to the docking station 254 (as shown) or, alternatively, generally horizontally oriented. Similarly, if the bottom door 204 is an automatic emptying door (see e.g., FIG. 141) and / or the bottom wall 198 of the dirt collection chamber 132 includes a separate automatic emptying door 206, the hand vacuum axis 116 may be generally vertically oriented when docked to the docking station 254 (as shown) or, alternatively, generally horizontally oriented.

[0535] Once docked or upon docking, the openable portion (i.e., the front door 202, bottom door 204, and / or automatic emptying door 206) may automatically move from the closed position (see e.g., FIGS. 20A, 20C, and 86A) to the open position (see e.g., FIGS. 20B, 20D, 84, 86B, and 141), placing the dirt collection chamber 132 and / or, optionally (as shown), the dirt collection region 130 within the air treatment chamber 128, in fluid communication with the station conduit 258. Subsequently, a station suction motor 259 in the station base 256 may generate suction to draw the contents of the dirt collection chamber 132 and / or the dirt collection region 130 through the opening of the openable portion and into the station conduit 258 and ultimately out a station air outlet. Alternatively, as described in greater detail subsequently, the suction motor 140 of the hand vacuum 100 may be used to generate the suction to draw the contents of the dirt collection chamber 132 and / or the dirt collection region 130 through the opening of the openable portion and into the station conduit 258. The withdrawn particulate matter may then collect in a station collection chamber within the station base 256 or, optionally, within the station conduit 258 (see e.g., FIG. 84). This may enable the hand vacuum 100 to be automatically emptied by the docking station 254.Detailed Discussion of Particular Features

[0536] The foregoing general description is intended to provide a basis for understanding several of the aspects that are discussed herein. It will be appreciated that any embodiment, such as the example embodiments described herein, may use any one or more of the aspects as described in the general description. Similarly, any embodiment may use any one or more of those features as described in greater detail in the following detailed discussion of particular configurations.Transverse Cyclone Having Multiple Chamber Air Inlets

[0537] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general description and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets.

[0538] As described previously, an advantage of increasing the number of chamber air inlets is that each chamber air inlet may be smaller in axial width while introducing dirty air into the air treatment chamber at about the same cumulative air flow rate. This may similarly enable the air treatment chamber to be smaller in axial length while achieving the desired number of revolutions of the airflow path within the air treatment chamber. Accordingly, an air treatment chamber having a plurality of chamber air inlets from one or more headers may meet or exceed the minimum desirable separation efficiency of particulate matter from the dirty airflow while providing a more compact hand vacuum.

[0539] Another advantage of increasing the number of chamber air inlets is that multiple airflow paths in the air treatment chamber may be provided, which may reduce resistance and turbulence (back pressure) in the airflow.

[0540] The air flow path delivering air to the plurality of chamber air inlets 176 may be of various designs. For example, and as discussed in more detail subsequently, some or all of the plurality of chamber air inlets 176 may be downstream from one or more partially annular or a fully annular headers (see for example FIGS. 8 to 10). Alternately, or in addition, as discussed in more detail subsequently, a plurality of conduits may define discrete channels that feed one or more of the plurality of air inlets. Accordingly, two or more conduits, each of which defines a channel that is isolated from the other channel(s), may be provided (see for example FIGS. 11 to 12). Alternately or in addition, one channel may branch off of another channel and a porous member may be provided at the interface of the two channels (see for example the bypass channel of FIGS. 13A and 13B).

[0541] Referring to FIGS. 8 to 10, in the illustrated examples, the air outlet conduit 156 defines a single channel 160, which in this embodiment includes the linear portion extending from the dirty air inlet 134 and a header 161 downstream of the linear portion. The header 161 has a plurality of dirty air outlets 162, each of which corresponds to a respective chamber air inlet 176. As exemplified, each dirty air outlet 162 and its corresponding chamber air inlet 176 forms a port in the treatment chamber sidewall 172. That is, each paired dirty air outlet 162 of the header and chamber air inlet 176 of the air treatment chamber 128 collectively define an outlet / inlet port through the conduit sidewall 158 / treatment chamber sidewall 172 (i.e., a common wall defining a portion of each of the treatment chamber sidewall 172 and the conduit sidewall 158). Accordingly, when the hand vacuum 100 in the illustrated embodiment is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, a vertical plane that is transverse to the central axis 170 (i.e., the cross-sectional view shown) may extend through a dirty air outlet 162 of the air inlet conduit 156, a corresponding chamber air inlet 176 of the air treatment chamber 128, the linear portion and header 161, and the air treatment chamber 128.

[0542] It will be appreciated that guide vanes or the like may be provided and the chamber air inlets 176 may be configured to produce a swirling or cyclone flow in the air treatment chamber 128. In such a case, each air chamber inlet 176 may be, e.g., a tangential inlet that is downstream from a dirty air outlet 162. For example, the dirty air outlet 162 may be an inlet to a tangential air inlet to a cyclone.

[0543] As shown, the conduit sidewall 158 around the channel 160 extends around at least a portion of the treatment chamber sidewall 172 of the air treatment chamber 128. In this way, as exemplified, the conduit sidewall 158 forms the radial outer wall of header 161, which may be partially annular or fully annular around at least part of the treatment chamber sidewall 172. The header 161 may extend around any amount of the circumference of the treatment chamber sidewall 172, such as at least 15% (e.g., at least 15%, 25%, 35%, 50%, 75%, 90% or 100%). For example, in the illustrated embodiments, the header 161 extends around at least 15% (see e.g., FIG. 8) and about 50% (see e.g., FIGS. 9 and 10) of the circumference of the treatment chamber sidewall 172.

[0544] The amount that the header 161 wraps around the air treatment chamber 128 may depend, for example, on the number of dirty air outlets 162 desired for the channel 160, the desired size of the dirty air outlets 162, and / or the desired spacing between the dirty air outlets 162. Any number of dirty air outlets 162 may be used, such as one, two (see e.g., FIG. 8), three (see e.g., FIG. 9), or more than three, such as seven (see e.g., FIG. 10). As shown in FIGS. 9 to 10, the size and / or spacing of the secondary dirty air outlets 162 may decrease as the number of secondary dirty air outlets 162 increases.

[0545] The width of the header 161 in a plane that is transverse to a direction of flow through the header 161 may be constant or may decrease in the downstream direction. It will be appreciated that the width of the header 161 may be the same as the downstream end of the linear portion of the air inlet conduit 156 that is located at the upstream end of the header 161.

[0546] Optionally, one or more of the dirty air outlets 162 may have a porous filtration material such as a mesh or a screen provided in the flow path. For example, in the embodiments illustrated in FIGS. 8 and 9, the first dirty air outlet 162 in the flow direction has a porous filtration material 168, shown as a screen. In such embodiments, at least one other dirty air outlet 162 may be open (i.e., may be free of / have an absence of any porous filtration material 168). For example, as exemplified in FIG. 8, two dirty air outlets 162 are provided, the upstream one having the porous filtration material 168 and the downstream one being free. If more than two dirty air outlets 162 are provided, then at least one, but not all, of the dirty air outlets may have a porous filtration material and the remainder are free. Optionally, the dirty air outlet 162 that is furthest downstream of all the dirty air outlets 162 may be open (see e.g., FIG. 9). Optionally, the remaining secondary dirty air outlets 1622 may also be open or, as shown in FIG. 9, have a porous filtration material 168.

[0547] The porous filtration material 168 of the upstream dirty air outlet 162 in FIG. 8 and the two upstream dirty air outlets 162 in FIG. 9 may permit dirty air carrying fine dirt particles to pass through to the corresponding chamber air inlet 176, while restricting the passage of coarse dirt particles. Those coarse dirt particles that may become stuck on the porous filtration material 168 of the upstream dirty air outlet(s) 162 may be stripped off of the porous filtration material 168 by the air flow in the header 161. The coarse dirt particles may then be carried downstream to the one or more dirty air outlets 162 which are free.

[0548] Optionally, the dirty air outlets 162 may provide gradated filtration of the dirty air flow. That is, the porous filtration material 168 of each dirty air outlet 162 may have a greater pore size than the porous filtration material 168 of the dirty air outlet 162 immediately upstream therefrom. In this way, dirt particles of successively greater size may be permitted to pass through a dirty air outlet 162 as the dirt particles travel further downstream in the header to the final open dirty air outlet 162.

[0549] Optionally, two or more of the dirty air outlets 162 (other than at least the downstream-most dirty air outlet) may share a common porous filtration material 168. In such embodiments, the common porous filtration material 168 may subdivide the header 161 into an inner header 1611 and an outer header 1612. The common porous filtration material 168 may extend, e.g., from the linear portion of the inlet conduit 156 angularly around part of the treatment chamber sidewall 172 at a location spaced radially outwardly of the chamber air inlets 176. Air may therefore pass through the common porous filtration material 168 and pass through the contained chamber air inlets 176 into the air treatment chamber 128.

[0550] The common porous filtration material 168 may have a single pores size or, optionally, a gradated pore size permitting successively larger dirt particles to pass through the porous filtration material 168 into the inner header 1611 as they travel further downstream in the outer header 1612.

[0551] It will be appreciated that the common porous filtration material 168 may be positioned adjacent the treatment chamber sidewall 172 and define dirty air outlets 162 of the header 161. However, as exemplified in FIG. 10, the common porous filtration material 168 is spaced apart from the exterior surface of the treatment chamber sidewall 172 radially outwardly of the dirty air outlets 162 to provide the inner header 1611 and the outer header 1612. In such embodiments, as shown, at least some of the dirty air outlets 162 radially inward of the common porous filtration material 168 may have a wall 260 protruding inwardly into the air inlet conduit 156 from the exterior surface of the treatment chamber sidewall 172 and extending part way through a radial thickness of the header 161. The common porous filtration material 168 may be supported on the walls 260.

[0552] As shown in FIG. 10, the walls 260 may each be a vane / deflector / hood positioned to direct air through the dirty air outlet 162 into the air treatment chamber. The vane / deflector / hood walls 260 may be configured to direct dirty air through the outlet / inlet port in the common wall shared between the conduit sidewall 158 and the treatment chamber sidewall 172. Accordingly, the walls 260 may extend from a downstream side of the corresponding dirty air outlet 162 and over the dirty air outlet 162 toward the upstream side thereof to catch and direct dirty air through outlet / inlet port in the common wall.

[0553] The cross-sectional shape of the air treatment chamber 128 may be generally circular at any location between the first and second end walls 174 in a plane that is transverse to the central axis 170. Optionally, the dimensions of the air treatment chamber 128 may vary at the location at which the header 161 wraps around the treatment chamber sidewall 172. That is, the radius of the generally circular cross-section (measured from the central axis 170 to the outer surface of the treatment chamber sidewall 172) may vary between the first and second end walls 174 according to the location of the air inlet conduit 156. For example, as shown in the embodiment illustrated in FIG. 48, the generally circular cross-section may have a first radius 2621 at one or more regions between the first and second end walls 174. Additionally, as shown, the generally circular cross-section may also have a second radius 2622 at another region between the first and second end walls 174. The first radius 2621 may be greater than the second radius 2622.

[0554] The one or more regions having the first radius 2621 may be spaced apart from the air inlet conduit 156. The region having the second radius 2622 may be at the location at which the header 161 wraps around the treatment chamber sidewall 172.

[0555] For example, in the embodiment illustrated in FIG. 49A, the air inlet conduit 156, and thus the header 161 and the region of the treatment chamber sidewall 172 having the second radius 2622, are centrally located between the first and second end walls 174 (see also e.g., FIGS. 30 and 31). The treatment chamber sidewall 172 further has two regions proximate the first and second end walls 174 having the first radius 2621. As shown, each region of the treatment chamber sidewall 172 having the first radius 2621 may be spaced apart from each region of treatment chamber sidewall 172 having the second radius 2622 by a transition region. The transition regions may have a gradually increasing radius moving from the region having the second radius 2622 to the region having the first radius 2621. In this way, as shown, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the air treatment chamber 128 may have a generally ‘bowtie’ shaped cross-section in a vertical plane that extends along the central axis 170 (e.g., taken along line 30-30 in FIG. 1).

[0556] The header 161 may be positioned at any other location, which may affect the cross-sectional shape of the air treatment chamber 128 in the vertical plane. For example, the air inlet conduit 156 and the header 161 may be positioned proximate one of the first and second end walls 174. In such embodiments, as shown in FIG. 49B, the region of the treatment chamber sidewall 172 having the second radius 2622 may be located proximate the one of the first and second end walls 174 proximate which the air inlet conduit 156 and header 161 are positioned, and the treatment chamber sidewall 172 may further have one region proximate the other of the first and second end walls 174 having the first radius 2621. These regions may be spaced apart by a transition region as described with respect to FIG. 49A. In this way, the air treatment chamber 128 may have a generally frusto-conically shaped cross-section in the vertical plane.

[0557] An advantage of the design in FIGS. 49A and 49B is that the header 161 may at least partially wrap around the treatment chamber sidewall 172 without the conduit sidewall 158 protruding beyond or significantly protruding beyond treatment chamber sidewall 172 having the first radius 2621. This, in turn, may provide a more compact hand vacuum 100. For example, as shown in FIG. 49A, a portion of a width of the conduit sidewall 158 around the header 161 in a direction that is transverse to the direction of air flow through the header 161 may be between the first radius 2621 and the second radius 2622. As shown, a remainder of the width of the conduit sidewall 158 may protrude beyond the first radius 2621. As another example, as shown in FIG. 49B, the full width of the conduit sidewall 158 may be between the first radius 2621 and the second radius 2622 (i.e., the second radius 2622 plus the width of the conduit sidewall 158 may be less than or equal to the first radius 2621).

[0558] Accordingly, the air treatment chamber 128 may be, e.g., a multi-inlet cyclone wherein the conduit sidewall 158 is at least partially, and optionally fully, nested within the first radius 2621 of the air treatment chamber 128. In this way, the air treatment chamber 128 may have multiple chamber air inlets 176 without increasing / substantially increasing the cross-sectional area of the air treatment assembly 124.Horizontal Cyclone Having Multiple Chamber Air Inlets

[0559] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general description and / or the detailed discussion, may have an air treatment chamber that is a horizontal cyclone which extends in a common direction with the axis 116 having a plurality of chamber air inlets.

[0560] As discussed with respect to a transverse cyclone having multiple chamber air inlets, the air flow path delivering air to the plurality of air inlets may be of various designs. For example, and as discussed in more detail subsequently, some or all of the plurality of chamber air inlets 176 may be downstream from one or more partially annular or a fully annular headers 161 (see e.g., FIG. 51). Alternately, or in addition, as discussed in more detail subsequently, a plurality of conduits may define discrete channels that feed one or more of the plurality of air inlets. Accordingly, two or more conduits, each of which defines a channel that is isolated from the other channel(s), may be provided. Alternately or in addition, a bypass channel may be used wherein one channel may branch off of another channel and a porous member may be provided at the interface of the two channels.

[0561] Further, the shape of the channel 160, header 161 and positioning of the dirty air outlets 162, and the use of a porous filtration member 168, such as the common porous filtration material 168, may be of any design discussed previously with respect to a transverse cyclone.

[0562] For example, in the embodiment illustrated in FIGS. 50 to 53, the air treatment chamber 128 of the hand vacuum 100 is a horizontal cyclone which extends in a common direction with the axis 116. As shown, in such embodiments, each of the hand vacuum axis 116, the conduit axis 164, and the central axis 170 may be generally parallel. Accordingly, at least a linear portion of the conduit sidewall 158 around the channel 160 may be generally parallel to the central axis 170.

[0563] Optionally, as exemplified in FIGS. 50 to 53, the linear portion of the air inlet conduit 156 may extend along the exterior surface of the treatment chamber sidewall 172, such as at the upper end of the air treatment chamber 128 (as shown), the lower end, a lateral side, or at any other location. Alternatively, the linear portion may optionally extend through the first end wall 1741 into the interior of the air treatment chamber 128. In such embodiments, the linear portion may extend along the interior surface of the treatment chamber sidewall 172 or, alternatively, extend into the air treatment chamber 128 at a location spaced apart from the treatment chamber sidewall 172 (e.g., centrally in the front wall of the cyclone chamber as exemplified in FIG. 76). In the latter embodiment, the conduit axis 164 may optionally be coaxial with the central axis 170.

[0564] The linear portion of the conduit sidewall 158 may extend any length along the air treatment chamber 128 such that the dirty air outlets 162 (and corresponding chamber air inlets 176) may be at any location at or between the first and second end walls 174. For example, the dirty air outlets 162 may be proximate the first (rear) end wall 1741 (as shown; see also e.g., FIG. 76), proximate the second (front) end wall 1742 (see e.g., FIG. 53), or any other location therebetween.

[0565] As discussed previously, the one or more channels 160 may be provided, each of which may terminate at one or more dirty air outlets 162 and each dirty air outlet 162 may be a port in the treatment chamber sidewall 172 of the air treatment chamber 128 whereby the dirty air outlet 162 and the chamber air inlet 176 are the same port or the dirty air outlet 162 may terminate at the inlet of an inlet, such as a tangential inlet to air treatment chamber 128. Any channel and inlet design discussed with respect to a transverse cyclone may be used with a horizontally extending cyclone.

[0566] For example, as shown in FIGS. 50 to 53, the upstream dirty air outlet 1621 has a porous filtration material 168. Each downstream dirty air outlet 1622, other than the downstream-most dirty air outlet 162, may also have a porous filtration material 168. Similarly, any of the dirty air outlets 162 may share a common porous filtration material 168 and / or each have a wall 260 similar to as described previously.

[0567] Alternatively, in embodiments where the linear portion extends through the first end wall 1741 into the interior of the air treatment chamber 128, the treatment chamber sidewall 172 and the conduit sidewall 158 may not share a common wall through which the dirty air outlets 162 pass to the corresponding chamber air inlets 176. Instead, as exemplified in FIG. 77, the dirty air outlets 162 may pass through the conduit sidewall 158 to the corresponding chamber air inlets 176. The porous filtration material 168 shown may optionally be omitted.

[0568] While the upstream dirty air outlet 1621 in the example embodiments described in this section is provided in a curved portion of the channel 160, it will be appreciated that the curved portion may optionally be omitted, and the upstream dirty air outlet 1621 may instead be provided in the linear portion. In such embodiments, the conduit sidewall 158 around the channel 160 may extend through the first end wall 1741 into the air treatment chamber 128, and the dirty air outlet 162 of the channel 160 may be axially opposed to the dirty air inlet 134 as described previously (i.e., an axial chamber air inlet).

[0569] Similar to as described previously, the cross-sectional shape of the air treatment chamber 128 may be generally circular at any location between the first and second end walls 174 in a plane that is transverse to the central axis 170, and the radius of the circular cross-section may optionally be varied depending on the location at which the header 161 wraps around the treatment chamber sidewall 172.Vertical Cyclone Having Multiple Chamber Air Inlets

[0570] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general description and / or the detailed discussion, may have an air treatment chamber that is a vertical cyclone having a plurality of chamber air inlets.

[0571] As discussed with respect to a transverse cyclone having multiple chamber air inlets, the air flow path delivering air to the plurality of air inlets may be of various designs. For example, and as discussed in more detail subsequently, some or all of the plurality of chamber air inlets 176 may be downstream from one or more partially annular or a fully annular headers 161 (see e.g., FIG. 56). Alternately, or in addition, as discussed in more detail subsequently, a plurality of air inlet conduits 156 may define discrete channels 160 that feed one or more of the plurality of air inlets. Accordingly, two or more conduits, each of which defines a channel that is isolated from the other channel(s), may be provided. Alternately or in addition, a bypass channel may be used wherein one channel may branch off of another channel and a porous member may be provided at the interface of the two channels.

[0572] Further, the shape of the channel 160, header 161 and positioning of the dirty air outlets 162, and the use of a porous filtration member 168, such as the common porous filtration material 168, may be of any design discussed previously with respect to a transverse cyclone.

[0573] For example, in the embodiment illustrated in FIGS. 54 to 58, the air treatment chamber 128 of the hand vacuum 100 is a vertical cyclone. As shown, in such embodiments, the hand vacuum axis 116 and the conduit axis 164 may be generally parallel, and the central axis 170 may be generally transverse to the hand vacuum axis 116 and conduit axis 164. Accordingly, at least a linear portion of the conduit sidewall 158 around the first channel 1601 may be transverse to the treatment chamber sidewall 172.

[0574] When the hand vacuum 100 in the illustrated embodiment is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, a horizontal plane that is transverse to the central axis 170 (i.e., the cross-sectional view shown in FIG. 56) may extend through each dirty air outlet 162, each chamber air inlet 176 of the air treatment chamber 128, the annular header 161 formed by the conduit sidewall 158 around the channel 160, and the air treatment chamber 128.

[0575] Similar to as described previously, the cross-sectional shape of the air treatment chamber 128 may be generally circular at any location between the first and second end walls 174 in a plane that is transverse to the central axis 170, and the radius of the circular cross-section may optionally be varied depending on the location at which the header 161 wraps around the treatment chamber sidewall 172.Multiple Chamber Air Inlets from Multiple Isolated Air Inlet Conduits

[0576] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber having a plurality of multiple air inlet conduits that are isolated from each other wherein each air inlet conduit extends to one or more chamber air inlet 176.

[0577] While the air treatment chambers in example embodiments described in this section are transverse cyclones, it will be appreciated that the features described herein may be equally applicable to horizontal cyclones which extend in a common direction with axis 166 and vertical cyclones. That is, an air treatment chamber that is a transverse cyclone, a horizontal cyclone, or a vertical cyclone may have a plurality of chamber air inlets from multiple air inlet conduits in accordance with this section.

[0578] Referring to FIGS. 11 and 12, in the illustrated embodiments, the hand vacuum 100 includes a first air inlet conduit 1561 and a second air inlet conduit 1562. Any other number of air inlet conduits 156 may be possible.

[0579] The air inlet conduits 156 may be provided at any location or combination of locations as described previously herein with respect to the single air inlet conduit 156. The air inlet conduits 156 may be laterally and / or vertically spaced apart from one another or they may be adjacent each other (vertically or laterally). For example, in the illustrated embodiments, the first air inlet conduit 1561 is a lower air inlet conduit and the second air inlet conduit 1562 is an adjacent upper air inlet conduit. That is, the first air inlet conduit 1561 is disposed below the second air inlet conduit 1562 when the hand vacuum 100 is oriented with the upper end 112 disposed immediately above the lower end 114.

[0580] The air inlet conduits 156 may each be configured as having a single dirty air outlet 162 (such as described with respect to e.g., FIGS. 3 and 6). Alternatively, the air inlet conduits 156 may each be configured as having multiple dirty air outlets 162 (such as described with respect to e.g., any of FIGS. 8 to 10). Optionally, the air inlet conduits 156 may have different configurations. For example, at least one of the air inlet conduits 156 may be configured as having a single dirty air outlet 162 and at least one other of the air inlet conduits 156 may be configured as having multiple dirty air outlets 162.

[0581] For example, in the vertical arrangement of the air inlet conduits 156 shown in each of FIGS. 11 and 12, the first air inlet conduit 1561 is configured as described with respect to FIG. 3 (i.e., with the dirty air outlet 162 axially opposed to the dirty air inlet 134). Accordingly, as shown, the conduit axis 164 of the first air inlet conduit 1561 intersects the dirty air inlet 134, the dirty air outlet 162, and the upper end of the air treatment chamber 128. The dirty air outlet 162 of the first air inlet conduit 1561 is open.

[0582] In the embodiment shown in FIG. 11, the dirty air outlet 162 of the second air inlet conduit 1562 is angularly positioned similar to as described with respect to the air inlet conduit 156 in FIG. 8. In the embodiment shown in FIG. 12, the dirty air outlet 162 of the second air inlet conduit 1562 is angularly positioned similar to as described with respect to FIG. 9.

[0583] Optionally, as shown, the second air inlet conduit 1562 may optionally pass over the air treatment chamber 128 such that the conduit axis 1642 of the second channel 1602 does not intersect the air treatment chamber 128.

[0584] The dirty air outlet(s) 162 of the second channel 1602 of the second air inlet conduit 1562 may be configured as described with respect to any of FIGS. 9 to 10. For example, the sole dirty air outlet 162 of the second air inlet conduit 1562 in FIG. 11 is open, while the upstream dirty air outlet 162 of the second air inlet conduit 1562 in FIG. 12 has a porous filtration material 168 and the downstream dirty air outlet 162 is open.Transverse Cyclone Having Multiple Chamber Air Inlets from an Air Inlet Conduit Having a Bypass Channel

[0585] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets from an air inlet conduit having a primary air outlet from a first channel and at least one secondary air outlet from a bypass channel.

[0586] An air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets from an air inlet conduit having primary air outlet from a first channel and at least one secondary air outlet from a bypass channel may confer similar advantages as described previously with respect to an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets. For example, increasing the number of chamber air inlets may enable the use of a smaller air treatment chamber, providing a more compact hand vacuum while still meeting or exceeding the minimum desirable separation efficiency of particulate matter from the dirty airflow. Additionally, the bypass second channel may advantageously provide pressure relief by distributing the airflow across different channels, which may mitigate pressure build-up, decreased separation efficiency, and / or burnout of the suction motor 140.

[0587] The bypass channel 1602 is a second channel that is downstream from an upstream or first channel 1601. The bypass second channel 1602 branches off from the first channel 1601. At a position at which the bypass second channel 1602 branches off from the first channel 1601, a porous member, such as a screen, may be provided to limit the size of dirt that may move with the air flow from the first channel 1601 into the bypass second channel 1602.

[0588] Optionally, the bypass second channel 1602 may branch off of the first channel 1601 at the downstream end of the first channel 1601.

[0589] As shown in FIGS. 13A, 13B, and 33A, the bypass second channel 1602 is physically divided from the first channel 1601. The first channel 1601 is in fluid flow communication with the bypass second channel 1602 through the channel communication port 166. As shown, the channel communication port 166 may be provided in the conduit sidewall 158 between the channels 160 within the overlapping length of the channels. The channel communication port 166 may be at any location within the overlapping length downstream of the dirty air inlet 134. In this way, as shown, the airflow path 138 may travel, e.g., generally radially outwardly (upwardly radially outwardly, in the illustrated embodiments) from the first channel 1601 through the channel communication port 166 into the bypass second channel 1602. In such embodiments, the conduit sidewall 158 around the bypass second channel 1602 may direct the airflow therein to one or more downstream secondary dirty air outlets 1622.

[0590] Optionally, as shown in FIG. 13B, the channel communication port 166 may be open (i.e., free of any porous filtration material). Alternatively, as shown in FIGS. 13A and 33A, the channel communication port 166 may optionally include a porous filtration material 168, such as a screen or mesh, over the channel communication port 166. In such embodiments, the porous filtration material 168 may operate similarly to as described previously. In particular, in operation, some air travelling through the first channel 1601 passes through the porous filtration material 168 into the bypass second channel 1602. Similar to as described with respect to FIGS. 8 to 10, the porous filtration material 168 may permit dirty air carrying fine dirt particles to pass through to the bypass second channel 1602, while restricting the passage of coarse dirt particles. Those coarse dirt particles that may become stuck on the porous filtration material 168 may be stripped off by the airflow travelling to the primary dirty air outlet 1621 of the first channel 1601 and through the corresponding chamber air inlet 176. The fine dirt particles may then be carried downstream through the bypass second channel 1602 to the one or more secondary dirty air outlets 1622 and through the corresponding chamber air inlet 176.

[0591] The first channel 1601 and the second channel 1602 may each be considered to be downstream of the air inlet conduit 156. The second channel 1602 may each be considered to be downstream of the first channel 1601.

[0592] A portion of the bypass second channel 1602 may overlap (e.g., extend generally in the same direction as) at least a portion of the first channel 1601. The bypass second channel 1602 and the first channel 1601 may be laterally or vertically adjacent to one another such that the overlapping length is at a lateral side, upper side, and / or lower side of each second channel 1602. For example, in the embodiments illustrated in FIGS. 13A, 13B, 33A, and 33B, the first channel 1601 is below the bypass second channel 1602 such that a portion of the upper side of the first channel 1601 overlaps (extends concurrently with) a portion of the lower side of the bypass second channel 1602. That is, the first channel 1601 is disposed below the bypass second channel 1602 when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114. In any embodiment, the channels may share a common wall for at least part of their length in the flow direction.

[0593] Similarly, the one or more secondary dirty air outlets 1622 of the bypass second channel 1602 may be configured as described previously with respect to the downstream dirty air outlet(s) 162 of any of FIGS. 8 to 10. For example, in the illustrated embodiments, the first channel 1601 and the primary dirty air outlet 1621 thereof, and the second channel 1602 and the secondary dirty air outlet 1622 thereof, are configured similar to as described with respect to FIG. 8.

[0594] Accordingly, the first channel 1601 may have one or more primary dirty air outlets 1621 which may be configured as described previously, such as described with respect to the upstream dirty air outlet 162 of any of FIGS. 8 to 10. Accordingly, as exemplified in FIG. 33A, the only dirty air outlet 1621 (or optionally the upstream dirty outlet 1621 or upstream dirty outlets 1621) may have an absence of a porous filtration material 168. Alternately, if the first channel 1601 has a plurality of dirt outlets 1621, then the upstream dirty outlet 1621 or upstream dirty outlets 1621 may have a porous filtration material 168 and the downstream dirty air outlets 1621 or the downstream most dirty air outlet 1621 may have an absence of a porous filtration material 168.

[0595] The channel communication port 166 may be at any location within the overlapping length downstream of the dirty air inlet 134. In this way, as shown, the airflow path 138 may travel generally radially outwardly (upwardly radially outwardly, in the illustrated embodiments) from the first channel 1601 through the channel communication port 166 into the bypass second channel 1602.Vertical Cyclone Having Multiple Chamber Air Inlets from an Air Inlet Conduit Having a Bypass Channel

[0596] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a vertical cyclone having a plurality of chamber air inlets from an air inlet conduit having primary air outlet from a first channel and at least one secondary air outlet from a bypass channel.

[0597] The shape and positioning of the first channel 1601 and the bypass second channel 1602 may be of any design discussed previously and may have one or more dirty air outlets of any design discussed previously.

[0598] Referring now to the embodiments illustrated in FIGS. 59 to 62 and 63 to 65, as best shown in FIGS. 61 and 65, the second channel 1602 downstream of the air inlet conduit 156 may be a bypass second channel 1602. The bypass second channel 1602 may confer similar advantages to those described previously with respect to an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets from an air inlet conduit having primary air outlet from a first channel and at least one secondary air outlet from a bypass channel.

[0599] Optionally, the first channel 1601 and the one or more primary dirty air outlets 1621 thereof, and the bypass second channel 1602 and the one or more secondary dirty air outlets 1622 thereof, may be configured as described previously, such as with respect to FIGS. 13A, 13B, 33A, and 33B (with the air treatment chamber 128 and air inlet conduit 156 rotated 90° such that the central axis 170 is vertically oriented). Accordingly, the linear portion of the conduit sidewall 158 around the first channel 1601 may extend generally parallel to the hand vacuum axis 116, and the bypass second channel 1602 may overlap at least a portion of the first channel 1601.

[0600] Optionally, the bypass second channel 1602 may branch off of the first channel 1601 at the downstream end of the first channel 1601. This configuration may be desirable where, as shown, the linear portion of the conduit sidewall 158 around the first channel 1601 extends at an acute angle to the hand vacuum axis 116. The linear portion of the conduit sidewall 158 around the first channel 1601 may extend at an acute angle to the hand vacuum axis 116 to provide a centrally located dirty air inlet 134 (i.e., centered between the lateral sides of the air treatment chamber 128) and a tangential chamber air inlet 176 corresponding to the primary dirty air outlet 1621.

[0601] The first channel 1601 may be in fluid flow communication with the bypass second channel 1602 through the channel communication port 166. As shown, the channel communication port 166 may be provided at the downstream end of the first channel 1601 proximate the primary dirty air outlet 1621 thereof such that one conduit axis 1641 may extend through both the dirty air inlet 134 and the primary dirty air outlet 1621 and another conduit axis 1642 may extend through both the dirty air inlet 134 and the channel communication port 166. In this way, as shown, the airflow path 138 may travel generally axially from the first channel 1601 through the channel communication port 166 into the bypass second channel 1602.

[0602] Optionally, as discussed previously, the channel communication port 166 may be open (i.e., free of any porous filtration material). Alternatively, as shown in FIGS. 61 and 65, the channel communication port 166 may include a porous filtration material 168, such as a screen or mesh, over the channel communication port 166. In such embodiments, the porous filtration material 168 may operate similarly to as described previously such that, in operation, some air travelling through the first channel 1601 carrying fine dirt particles passes through the porous filtration material 168 into the second channel 1602 and carried to the one or more secondary dirty air outlets 1622 thereof. Restricted coarse dirt particles that may become stuck on the porous filtration material 168 may be stripped off by the airflow travelling to the primary dirty air outlet 1621 of the first channel 1601.Horizontal Cyclone Having Multiple Chamber Air Inlets from an Air Inlet Conduit Having a Bypass Channel

[0603] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a horizontal cyclone having an axis that extends in a common direction with the axis 166 with a plurality of chamber air inlets from an air inlet conduit having one or more primary air outlets from a first channel and one or more secondary air outlets from a bypass channel.

[0604] The shape and positioning of the first channel 1601 and the bypass second channel 1602 may be of any design discussed previously and may have one or more dirty air outlets of any design discussed previously.

[0605] As exemplified in FIGS. 66 to 69, 70 to 73, 74 to 77, and 78 to 82, as best shown in FIGS. 66, 71, and 77, the second channel 1602 of the air inlet conduit 156 is a bypass second channel 1602. The bypass second channel 1602 may confer similar advantages to those described previously with respect to an air treatment chamber that is a transverse cyclone having a plurality of chamber air inlets from an air inlet conduit having primary air outlet from a first channel and at least one secondary air outlet from a bypass channel.

[0606] The air inlet conduit 156 may be configured any way as described with respect to the air treatment chamber that is a horizontal cyclone having a plurality of chamber air inlets. For example, in the illustrated embodiments, the conduit sidewall 158 of each channel includes a linear portion around the first channel 1601 extending in the direction of the conduit axis 164. As shown, the conduit axis 164, the hand vacuum axis 116, and the central axis 170 of the air treatment chamber 128 are generally parallel. Additionally, the conduit sidewall 158 of each channel may include a curved portion around the first channel 1601 and a curved portion around the second channel 1602.

[0607] In the embodiments illustrated in FIGS. 66 to 69, 70 to 73, and 78 to 82, the linear portion of the conduit sidewall 158 around the first channel 1601 extends along the exterior surface of the treatment chamber sidewall 172 at the upper end of the air treatment chamber 128. As shown, the linear portion extends to the rear end of the air treatment chamber 128 and feeds into the curved portion of the first channel 1601 and the bypass second channel 1602 downstream therefrom. Accordingly, the primary dirty air outlet 1621 of the first channel 1601 in the curved portion of the conduit sidewall 158, the secondary dirty air outlet(s) 1622 of the bypass second channel 1602, and the corresponding chamber air inlets 176, are located proximate the second end wall 1742.

[0608] The conduit sidewall 158 around the curved portion of the first channel 1601 and the bypass second channel 1602 may be configured similar to as described previously with respect to FIGS. 50 to 53. For example, in the embodiments illustrated in FIGS. 66 to 69, 70 to 73, and 78 to 82, the first channel 1601 is in fluid communication with the second channel 1602 through the channel communication port 166 proximate the primary dirty air outlet 1621 provided in the curved portion of the conduit sidewall 158 between the first and second channels 160.

[0609] Additionally, the conduit sidewall 158 around the curved portion of the first and second channels 160 may wrap around at least a portion of the treatment chamber sidewall 172 forming a partially annular or fully annular header around the air treatment chamber 128 as described previously. For example, in the embodiments illustrated in FIGS. 66 to 69 and 70 to 73, the conduit sidewall 158 around the bypass second channel 1602 and the curved portion of the first channel 1601 extends around about 25% of the treatment chamber sidewall 172 of the air treatment chamber 128. As another example, in the embodiments illustrated in FIGS. 79 to 80 and 81 to 82, the conduit sidewall 158 around the bypass second channel 1602 and the curved portion of the first channel 1601 extends around about 75% of the treatment chamber sidewall 172 of the air treatment chamber 128. In such embodiments, as shown, the conduit sidewall 158 around the bypass second channel 1602 may pass below the lower end of the air treatment chamber 128 between the dirt collection chamber 132 (see e.g., FIG. 79), the second stage dirt collection chamber 1322 (see e.g., FIG. 81), or a common dirt collection chamber.

[0610] In the embodiment illustrated in FIGS. 74 to 77, the linear portion extends through the second end wall 1742 into the interior of the air treatment chamber 128 at a location spaced apart from the treatment chamber sidewall 172. As shown, the conduit axis 164 of a linear portion of the conduit sidewall 158 around the first channel 1601 may optionally be coaxial with the central axis 170. As shown, the linear portion extends to a location between the front and rear ends of the air treatment chamber 128. Accordingly, the primary dirty air outlet 1621, the secondary dirty air outlet(s) 1622, and the corresponding chamber air inlets 176, are located interior to the air treatment chamber 128 proximate the second (front) end wall 1742.

[0611] As described previously, the first channel 1601 may be in fluid flow communication with the bypass second channel 1602 through the channel communication port 166. As shown, the channel communication port 166 may be provided at the downstream end of the linear portion of the first channel 1601 proximate the location where the linear portion of the first channel 1601 feeds into the curved portion of the first channel 1601 (see e.g., FIGS. 77A and 77B). That is, as shown, both the bypass second channel 1602 and the curved portion of the first channel 1601 branch off of the linear portion of the first channel 1601 at the downstream end thereof such that the air flow may travel radially outwardly from the linear portion of the first channel 1601 into the bypass second channel 1602 and the curved portion of the first channel 1601.

[0612] Alternatively, optionally only the curved portion of the first channel 1601 may branch off of the linear portion of the first channel 1601, and the curved portion of the first channel 1601 may feed into the bypass second channel 1602 as described with respect to FIGS. 66 and 71. As a further alternative, the curved portion of the first channel 1601 may optionally be omitted and only the bypass second channel 1602 may branch off of the linear portion of the first channel 1601. In such embodiments, the primary dirty air outlet 1621 may be axially opposed to the dirty air inlet 134 (i.e., an axial chamber air inlet).

[0613] In any embodiment if the linear portion of conduit sidewall 158 around the first channel 1601 extends through the first end wall 1741 into the air treatment chamber 128, since the conduit sidewall 158 around the curved portion of the first channel 1601 and the bypass second channel 1602 is interior to the air treatment chamber 128, the inlet / outlet port between each dirty air outlet 162 and the corresponding chamber air inlet 176 may be through the conduit sidewall 158 only (i.e., not through a common wall shared with the treatment chamber sidewall 172) (see e.g., FIGS. 77A and 77B).

[0614] In any embodiment, the channel communication port 166 may optionally include the porous filtration material 168. In such embodiments, the primary dirty air outlet 1621 may be open and the secondary dirty air outlet(s) 1622 may have any configuration as described previously. For example, as shown in FIGS. 66 to 69, 70 to 73, 74 to 77, and 78 to 82, the channel communication port 166 includes the porous filtration material 168 and both of the primary dirty air outlet 1621 and the sole secondary dirty air outlet 1622 are open. In such embodiments, the porous filtration material 168 of the channel communication port 166 may operate similarly to as described previously such that, in operation, some air travelling through the first channel 1601 carrying fine dirt particles passes through the porous filtration material 168 into the bypass second channel 1602 to the one or more secondary dirty air outlets 1622 thereof. Restricted coarse dirt particles that may become stuck on the porous filtration material 168 may be stripped off by the airflow travelling to the primary dirty air outlet 1621 of the first channel 1601 (see e.g., FIGS. 66 and 71) or into the curved portion of the first channel 1601 (see e.g., FIGS. 77A and 77B).

[0615] Accordingly, while described separately with respect to a transverse, horizontal or vertical cyclone, any feature of an air treatment chamber, such as a cyclone chamber, having a bypass channel may be used with an air treatment chamber (e.g., cyclone) having any orientation.Air Treatment Chamber Having Multiple Chamber Air Inlets from an Air Inlet Conduit Having an Electrical Connector

[0616] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber having a plurality of chamber air inlets from an air inlet conduit having an electrical connector proximate the dirty air inlet.

[0617] As described previously, in addition to functioning as a nozzle, this design may advantageously enable the air inlet conduit 156 to be electrically connected (directly or indirectly via the wand 104) to the wand 104 or any suitable accessory tool upon mechanically connecting to the hand vacuum 100.

[0618] In any embodiment, the air treatment chamber 128 having a plurality of chamber air inlets 172 may be cyclonic, such as a transverse cyclone (see e.g., FIGS. 8, 9, 10, 11, 12, 13A, 13B, 33A, and 33B), a horizontal cyclone (see e.g., FIGS. 50 to 53, 66 to 69, 70 to 73, and 78 to 82), or a vertical cyclone (see e.g., FIGS. 54 to 58, 59 to 62, and 63 to 65). In any such embodiments, the air treatment chamber 128 may be downstream from the air inlet conduit 156 having the electrical connector 244 proximate the dirty air inlet 134, and the air inlet conduit 156 may have a header 161 feeding a plurality of air inlets (see e.g., FIGS. 8, 9, 10, 50 to 53, and 54 to 58), a bypass air conduit (see e.g., FIGS. 13A, 13B, 33A, 33B, 59 to 62, 63 to 65, 66 to 69, 70 to 73, and 78 to 82), or one of a plurality of air inlet conduits (see e.g., FIGS. 11 and 12).

[0619] In these embodiments, the air inlet conduit 156 of each of the various configurations includes the electrical connector 244 proximate the dirty air inlet 134, and the electrical connector 244 is detachably matingly connectable to the electrical connector 244 of the wand 104 or accessory tool. Upon mating connection of the electrical connectors 244, power may be supplied from the energy storage members 144 and / or electrical cord of the hand vacuum 100 to the wand 104 or accessory tool via wiring 246. The wiring 246 may follow any path through the hand vacuum 100 from the power supply to the electrical connector 244 as described previously herein.Transverse Cyclone Having an Air Outlet at One End Wall

[0620] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone having and an air outlet at one end wall.

[0621] In any embodiment, such as in the embodiment illustrated in FIGS. 22 and 27, the air treatment chamber 128 may have one chamber air outlet. As shown, the chamber air outlet may be provided at either one of the first and second end walls174. The chamber air outlet may have an outlet port through the one of the first and second end walls 174 (i.e., as shown) or, alternatively, through the treatment chamber sidewall 172 proximate the one of the first and second end walls 174.

[0622] The chamber air outlet may be configured any way as described previously herein. For example, as shown in the illustrated embodiments, each chamber air outlet may have the porous member 180 positioned over the chamber air outlet port 178 and extending axially inwardly into the air treatment chamber 128 from the respective end wall 174. Further, as shown, each chamber air outlet may have an air outlet conduit 182 extending from an outlet end of the conduit 182 at the respective end wall 174 to the distal inlet end axially spaced inwardly from the end wall 174, and the porous member 180 may extend axially inwardly into the air treatment chamber 128 from the distal end of the air outlet conduit 182.

[0623] Optionally, as shown in FIG. 22, if a chamber air outlet is provided at only one of the end walls 174, the air treatment chamber 128 may optionally include an air impermeable vortex finder 184 extending axially inwardly into the air treatment chamber 128 from the other end wall 174. Alternatively, as shown in FIG. 27, the other of the end walls 174 may optionally be an air impermeable, solid planar wall.

[0624] The air inlet conduit 156 may be of any design as described herein. Accordingly, the inlet / outlet port extending from each of the one or more dirty air outlets 162 of the air inlet conduit 156 to the corresponding chamber air inlet 176 may be provided through the common wall shared between the conduit sidewall 158 and the treatment chamber sidewall 172.

[0625] In any embodiment, if the chamber air outlet is provided at one of the end walls 174, the at least one chamber air inlet 176 may be generally centrally located (e.g., midway) between the first and second end walls 174 (see, e.g., FIG. 27). As described previously, this design may generate a hybrid airflow path 138 within an air treatment chamber 128 such as a cyclone chamber. Alternately, such as shown in the embodiment illustrated in FIG. 22, the at least one chamber air inlet 176 may be provided at the end wall opposed to the end wall with the air outlet (i.e., a uniflow configuration as described previously). In either of such of the illustrated embodiments, as shown, the chamber air inlet(s) 176 may be located axially inwardly from the porous member 180. Alternately, the air inlet may be located at the same end as the air outlet.

[0626] In any embodiment, the air treatment chamber 128, treatment chamber sidewall 172, optional moveable portion 188, and dirt outlet(s) 192 may be configured as shown in the illustrated embodiments or may have any other configuration as described herein.Transverse Cyclone Having Vortex Finders at Both End Walls

[0627] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone having and a vortex finder at both end walls and one or both of which may be an air outlet. The vortex finders at both end walls may advantageously assist in generating and / or maintaining a cyclonic airflow path within the air treatment chamber.

[0628] As shown in the embodiments illustrated in FIGS. 22 and 24 to 26, the chamber air outlet may be provided at one (see e.g., FIG. 22) or both (see e.g., FIGS. 24 to 26) of the first and second end walls 174. The chamber air outlet may comprise an outlet port through the one of the first and second end walls 174 (i.e., as shown). Alternatively, in some embodiments, the chamber air outlet may comprise an outlet port through the treatment chamber sidewall 172 proximate one of the first and second end walls 174. In such embodiments, the airflow path 138 may exit the air treatment chamber 128 into an air outlet duct 208 at the upper end or lower end of the air treatment chamber 128 or, alternatively, in the rearward direction into an air outlet duct 208, subsequent cleaning stage 126, or the main body housing 120.

[0629] As described previously, the porous member 180 of each chamber air outlet may, alone or collectively with their respective air outlet conduits 182 (if present), be referred to herein as porous vortex finders 180. Accordingly, the porous vortex finders 180 may be of any configuration as described herein with respect to the porous member 180 alone or in combination with the air outlet conduit 182.

[0630] As shown in FIGS. 24 to 26, if a chamber air outlet is provided at both of the first and second end walls 174, the air treatment chamber 128 may similarly include the porous vortex finder 180 at each end wall 174.

[0631] Alternatively, as shown in FIG. 22, if only one chamber air outlet is provided in one of the first and second end walls 174, the air treatment chamber 128 may similarly include the porous vortex finder 180 at the one of the first and second end walls 174. In such embodiments, as shown, the opposed end wall 174 may be a solid planar wall (i.e., air impermeable see e.g., FIG. 22) and the air treatment chamber 128 may optionally include an air impermeable vortex finder 184 provided at the opposed end wall 174 (see e.g., FIG. 22). Similarly, in embodiments wherein the chamber air outlet is provided in the treatment chamber sidewall 172 proximate one of the first and second end walls 174, the first and second end walls 174 may be solid planar walls, and the air treatment chamber 128 may include impermeable vortex finders 184 at each end wall 174.

[0632] In any such embodiments, each impermeable vortex finder 184 may extend axially inwardly into the air treatment chamber 128 from its respective end wall 174 similar to as described with respect to the porous vortex finder 180. The impermeable vortex finder 184 may be a solid member having any shape as described with respect to the porous vortex finder 180. The shape may be the same as or, optionally, different from the shape of the porous vortex finder 180 used in the cyclone chamber. For example, the impermeable vortex finder 184 may be semi-spherical, cylindrical, conical, or frusto-conical (as shown).

[0633] The air inlet conduit 156 may be of any design as described herein. Accordingly, the inlet / outlet port extending from each of the one or more dirty air outlets 162 of the air inlet conduit 156 to the corresponding chamber air inlet 176 may be provided through the common wall shared between the conduit sidewall 158 and the treatment chamber sidewall 172.

[0634] In embodiments having only one chamber air outlet is present, the at least one chamber air inlet 176 may be located proximate the end wall 174 at which the chamber air outlet is positioned, proximate the opposed end wall 174 (see e.g., FIG. 22), or generally centrally located (e.g., midway) between the first and second end walls 174 similar to as described previously. In embodiments wherein more than one chamber air outlet is present, the at least one chamber air inlet 176 may be located proximate either of the end walls 174 or generally centrally located between the first and second end walls 174 similar to as described previously (see e.g., FIGS. 24 to 26). Any other location may be used.

[0635] In any embodiment, the air treatment chamber 128, treatment chamber sidewall 172, optional moveable portion 188, and dirt outlet(s) 192 may be configured as shown in the illustrated embodiments or may have any other configuration as described herein.Trapezoidal Transverse Cyclone

[0636] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a trapezoidal transverse cyclone. This design may advantageously provide a more compact hand vacuum 100.

[0637] For example, referring to FIGS. 25 and 27 the air treatment chamber 128 has a trapezoidal cross-sectional shape in a horizontal plane that is parallel to both the hand vacuum axis 116 and the central axis 170 (i.e., along line 3-3 in FIG. 1). Similarly, the air treatment chamber 128 in FIGS. 34 to 35 has a trapezoidal cross-sectional shape in a horizontal plane that is parallel to both the hand vacuum axis 116 and the central axis 170 (i.e., along line 34-34 in FIG. 32).

[0638] As shown, the treatment chamber sidewall 172 at the front end of the air treatment chamber 128 is longer in the transverse direction between the first and second end walls 174 than the treatment chamber sidewall 172 at the rear end of the air treatment chamber 128. Accordingly, the air treatment chamber 128 is wider at the front end and narrows in the direction of the hand vacuum axis 116 toward the rear end. This may enable the airflow path 138 from each chamber air outlet to travel rearwardly in each air outlet duct 208 within the cross-sectional area of the front end of the air treatment chamber 128. That is, each air outlet duct 208 may be shaped corresponding to the particular trapezoidal cross-sectional shape of the air treatment chamber 128 such that the airflow path 138 from each chamber air outlet may travel rearwardly from the first and / or second transversely opposed end walls 174 without requiring the air treatment assembly 124 to be wider in the transverse direction.

[0639] Each air outlet duct 208 extending along the exterior of the corresponding end wall 174 of the air treatment chamber 128 may be shaped so as to not protrude outwardly beyond the corresponding end wall 174 at the front end of the air treatment chamber 128. Accordingly, each air outlet duct 208 may be generally triangular (e.g., right-angle triangle) in cross-sectional shape (see e.g., FIGS. 25, 27, 34, and 35) to produce a generally rectangular cross-sectional shape of the air treatment assembly 124 in the horizontal plane (i.e., taken along line 3-3 in FIG. 1 and line 34-34 in FIG. 32). Accordingly, the maximum transverse dimension of the air treatment assembly may be the same as the axial length of the treatment chamber sidewall 172 at the front end of the chamber 128. The axial dimension of the outlet ducts 208 may increase in the downstream (rearward) direction as the axial length of the sidewall 172 decreases. It will be appreciated that the duct 208 at the front end may extend axially outwardly from the end wall 174 and the axial dimension of the outlet ducts 208 may increase in the downstream (rearward) direction as the axial length of the sidewall 172 decreases. It will also be appreciated that the longest side of the chamber need not be the front side but may be the rear side, if the air flow from the chamber 128 extends, e.g., forwardly in the downstream direction.

[0640] In operation, air travels in a direction of flow through each air outlet duct 208 (rearward, in the illustrated embodiments). To be correspondingly shaped to the trapezoidal air treatment chamber 128, each air outlet duct 208 may have a cross-sectional flow area in a plane transverse to the direction of flow and / or in the direction of the central axis 170. Accordingly, as shown, the cross-sectional flow area increases in the downstream direction (i.e., in the direction of the hand vacuum axis 116 from the front end of the air treatment chamber 128 to the rear end thereof). Optionally, as shown in each of FIGS. 25, 27, and 34 to 35, the width of the air treatment chamber 128 may decrease generally linearly from the front end to the rear end. The cross-sectional flow area of each air outlet duct 208 may therefore increase generally linearly in the downstream direction corresponding to the decreasing width of the air treatment chamber 128.

[0641] Optionally, only one air outlet duct 208 may be provided (see e.g., FIG. 27). Alternatively, two air outlet ducts 208 may be provided (see e.g., FIGS. 25, and 34 to 35). In either case, each air outlet duct 208 may be shaped corresponding to the air treatment chamber 128 such that the air outlet duct 208 is positioned between the corresponding end wall 174 and a lateral side of the hand vacuum 100, which may be the lateral side of the air treatment assembly.

[0642] Optionally, each air outlet duct 208 may extend to a second cleaning stage 1262, which may be rearward of the air treatment chamber 128. In such embodiments, as shown in FIGS. 34 to 35, a downstream end of the air outlet ducts 208 may extend to one or more chamber air inlets 210 of each air treatment chamber 128 of the second cleaning stage 1262.

[0643] Alternatively, if a second cleaning stage 1262 is not provided, each air outlet duct 208 may extend rearwardly from the air treatment chamber 128 along an interior of the main body housing 120. For example, as shown in the embodiment illustrated in FIGS. 25 and 27, the upstream portion of the air outlet ducts 208 extending along the chamber 128 may be generally triangular in cross-sectional shape and the downstream portion of the duct 208, which may be in the main body housing 120 may be generally rectangular in cross-sectional shape. Accordingly, as shown, each air outlet duct 208 may extend along both the exterior of the corresponding end wall 174 of the air treatment chamber 128 and within the interior of the main body housing 120 without increasing the cross-sectional area thereof. Each air outlet duct 208 may extend rearwardly to a pre-motor filter 148 or suction motor 140 positioned in the main body housing 120 at the downstream end of the air outlet duct 208. It will be appreciated that part or all of the downstream portion of the duct 208 may be part of a header for a pre-motor filter or may extend to a header for a pre-motor filter.

[0644] It will be appreciated that, in other embodiments, the air treatment chamber 128 may be trapezoidal in any other plane, and the air outlet ducts 208 can be correspondingly shaped in that same plane as described previously. For example, the air treatment chamber 128 may have a trapezoidal cross-sectional shape in a vertical plane that is transverse to the hand vacuum axis 116 and parallel to the central axis 170 (e.g., along line 30-30 in FIG. 1). In such embodiments, the treatment chamber sidewall 172 at one of the upper and lower ends of the air treatment chamber 128 may be longer in the transverse direction between the first and second end walls 174 than the treatment chamber sidewall 172 at the other of the upper and lower ends. Similarly, each air outlet duct 208 extending along the exterior of the corresponding end wall 174 of the air treatment chamber 128 may be shaped so as to not protrude outwardly beyond the corresponding end wall 174 at the wider of the upper and lower ends of the air treatment chamber 128. In such embodiments, the direction of flow through each air outlet duct 208 may optionally be upward or downward (e.g., similar to as shown in FIG. 37).Concurrently Openable Transverse Cyclone and Dirt Collection Chamber Front Door

[0645] A hand vacuum cleaner using any one or more aspects discussed herein, including one or more of the other aspects set out herein in the general discussion and / or the detailed discussion, may have an air treatment chamber that is a transverse cyclone wherein the cyclone and a dirt collection chamber each have a front door that open concurrently.

[0646] In any embodiment, the air treatment assembly 124 may include an openable portion at the front end thereof that is moveable between a closed position, in which the hand vacuum 100 is operable to clean a surface, and an open position, in which the dirt collection chamber 132 and air treatment chamber 128 are open. Accordingly, in some embodiments, the openable portion of the air treatment assembly 124 may include the front door 202 of the dirt collection chamber 132, which may be a front door of the air treatment assembly 124, and the moveable portion 188 of the treatment chamber sidewall 172. In such embodiments, this may advantageously enable the dirt collection chamber 132 and the dirt collection region 130 of the air treatment chamber 128 to be emptied concurrently. That is, as described previously, when the openable portion (front door 202 and moveable portion 188) is in the open position, the dirt collection region 130 may be placed in communication with the dirt collection chamber 132, which is itself placed in communication with an exterior of the hand vacuum 100, such that the dirt collection region 130 and dirt collection chamber 132 may be concurrently emptied.

[0647] In such embodiments, the openable portion of the air treatment assembly 124 may be rotatable about the mount 190 (i.e., a rotational mount). The rotational mount 190 may be provided at any suitable location, such as those described previously herein. The location of the rotational mount 190 may be chosen to provide any openable portion with any directional motion, such as those described previously herein. Any type of rotational mount may be used. As exemplified, a pivot mount is used.

[0648] As exemplified, a single rotational mount 190 may be used. The mount 190 may be provided on one or both of the front door 202 of the dirt collection chamber 132 and the moveable portion 188 of the treatment chamber sidewall 172. For example, the rotational mount 190 may be provided at an end of one of the front door 202 and the moveable portion 188 and the front door 202 and the moveable portion 188 may be connected together so they move concurrently. Alternatively, as described in greater detail in the subsequent section, separate mounts 190 may be used for the front door 202 and the moveable portion 188. Separate mounts 190 may enable the front door 202 and the moveable portion 188 to move concurrently or separately sequentially.

[0649] Referring to FIGS. 15A and 15B, in the illustrated embodiment, the openable portion of the air treatment assembly 124 includes the front door 202 of the dirt collection chamber 132 and the moveable portion 188 of the treatment chamber sidewall 172. As shown, the rotatable mount 190 is provided at the front end of the air treatment chamber 128, which is also the front end of the air treatment assembly 124, at an upper end of the front door 202 such that, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, the openable portion rotates forwardly and upwardly. Optionally, as shown in the illustrated embodiment, the rotational mount 190 is located above the mid-line of the air treatment chamber 128 (i.e., above a horizontal plane that extends along the central axis 170 at an elevation equidistantly between the lower end of the air treatment chamber 128 and the upper end of the air treatment chamber 128).

[0650] In the illustrated embodiment, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand vacuum axis 116 oriented horizontally, at least a portion of the dirt collection chamber 132 is positioned below the air treatment chamber 128. Accordingly, each dirt outlet 192, having any configuration and orientation as described previously herein, may be provided in the lower end of the air treatment chamber 128 facing generally downwardly into the dirt collection chamber 132.

[0651] Additionally, when the openable portion of the air treatment assembly 124 moves from the closed position to the open position, the rotational path of the moveable portion 188 passes through the dirt collection chamber 132. During this movement, as the moveable portion 188 swings through a portion of the dirt collection chamber 132, the moveable portion 188 may contact and push out some or all dirt and debris out of the dirt collection chamber 132. Therefore, the moveable portion 188 may be used to assist in pushing particulate matter from the dirt collection chamber 132 through the open front door 202. Accordingly, the moveable portion 188 may optionally be sized such that a distal end thereof comes into close proximity with the bottom wall 198 of the dirt chamber sidewall 194 and / or the lateral edges come into close proximity with the lateral sides of the dirt chamber sidewall 194.

[0652] In embodiments such as FIGS. 15A and 15B wherein at least a portion of the dirt collection chamber 132 is positioned below the air treatment chamber 128, the remaining components of the hand vacuum 100 may be at any position as described herein. The components of the hand vacuum 100 may be positioned such that an alignment axis 264 that is parallel to hand vacuum axis 116 extends through the dirt collection chamber 132, and through one or more of the pre-motor filter 148, energy storage member housing 146, suction motor 140, and post-motor filter 150. The alignment axis 264 may be at any position between the lower end of the air treatment chamber 128 and the bottom wall 198 of the dirt collection chamber 132.

[0653] For example, in the embodiment illustrated in FIG. 15A, when the hand vacuum 100 is oriented with the upper end 112 disposed above the lower end 114 and the hand ...

Examples

Embodiment Construction

[0351]Various apparatus, methods and compositions are described below to provide an example of an embodiment of each claimed invention. No embodiment described below limits any claimed invention and any claimed invention may cover apparatuses and methods that differ from those described below. The claimed inventions are not limited to apparatus, methods and compositions having all of the features of any one apparatus, method or composition described below or to features common to multiple or all of the apparatus, methods or compositions described below. It is possible that an apparatus, method or composition described below is not an embodiment of any claimed invention. Any invention disclosed in an apparatus, method or composition described below that is not claimed in this document may be the subject matter of another protective instrument, for example, a continuing patent application, and the applicant(s), inventor(s) and / or owner(s) do not intend to abandon, disclaim, or dedicat...

Claims

1. A hand vacuum cleaner having a front end, a rear end and a hand vacuum cleaner axis extending centrally through the hand vacuum cleaner between the front and rear ends, the hand vacuum cleaner comprising:(a) an air flow path extending from a dirty air inlet provided at the front end of the hand vacuum cleaner to a clean air outlet, which is positioned rearward of the dirty air inlet, with a motor and fan assembly provided in the air flow path;(b) a cyclone assembly provided in the air flow path, the cyclone assembly comprising a cyclone chamber and a dirt collection chamber exterior to the cyclone chamber, the cyclone chamber comprising a cyclone air inlet, a first cyclone air outlet, a dirt outlet in communication with the dirt collection chamber and a cyclone axis of rotation; and,(c) a handle,wherein, when the hand vacuum cleaner axis is oriented horizontally, the cyclone axis of rotation is oriented generally horizontally and extends generally transverse to the hand vacuum cleaner axis and the cyclone chamber comprises a first end wall, an opposed second end wall and a cyclone sidewall extending transversely between the first and second end walls, andwherein, when the hand vacuum cleaner is oriented with the dirty air inlet provided at an upper end of the hand vacuum cleaner and the hand vacuum cleaner axis is oriented horizontally, the hand vacuum cleaner has a lower end, the cyclone chamber has a lower end, an upper end and a mid-line positioned at an elevation equidistantly between a bottom of the cyclone chamber and a top of the cyclone chamber and the dirt collection chamber has a lower end, andwherein a front end of the cyclone assembly has an openable portion which is moveably mounted by a mount between a closed position, in which the hand vacuum cleaner is operable to clean a surface, and an open position, in which the cyclone chamber and the dirt collection chamber are opened, and the mount is provided between the mid-line and the top of the cyclone chamber.

2. The hand vacuum cleaner of claim 1 wherein the mount is a rotational mount.

3. The hand vacuum cleaner of claim 2 wherein, when the hand vacuum cleaner is oriented with the dirty air inlet provided at an upper end of the hand vacuum cleaner and the hand vacuum cleaner axis is oriented horizontally, the openable portion rotates forwardly and upwardly to the open position.

4. The hand vacuum cleaner of claim 1 wherein the dirt outlet is provided in the lower end of the cyclone chamber.

5. The hand vacuum cleaner of claim 1 wherein the dirt outlet is provided in the cyclone sidewall.

6. The hand vacuum cleaner of claim 5 wherein the dirt outlet is provided in the lower end of the cyclone chamber, the cyclone air inlet is provided at an upper end of the cyclone chamber and the first cyclone air outlet is provided in the first end wall.

7. The hand vacuum cleaner of claim 1 wherein the openable portion comprises a portion of a front wall of the dirt collection chamber and a portion of the sidewall of the cyclone chamber, wherein, as the openable portion moves to the open position, an opening is provided in the front wall of the dirt collection chamber and, when the openable portion is in the open position, a section of the openable portion closes the opening.

8. The hand vacuum cleaner of claim 7 wherein the section comprises the portion of the sidewall of the cyclone chamber.

9. The hand vacuum cleaner of claim 8 further comprising a sealing member provided on at least one of a forward side of the portion of the sidewall of the cyclone chamber and a rearward side of a section of the front wall of the dirt collection chamber having the opening.

10. The hand vacuum cleaner of claim 1 wherein a front end of the dirt collection chamber has an openable door which is moveably mounted by a mount between a closed position, in which the hand vacuum cleaner is operable to clean a surface, and an open position, in which the dirt collection chamber is opened.

11. The hand vacuum cleaner of claim 10 wherein the mount is provided at the lower end of the dirt collection chamber.

12. The hand vacuum cleaner of claim 11 wherein the mount is a rotational mount.

13. The hand vacuum cleaner of claim 11 wherein, when the hand vacuum cleaner is oriented with the dirty air inlet provided at an upper end of the hand vacuum cleaner and the hand vacuum cleaner axis is oriented horizontally, the openable door rotates forwardly and upwardly to the open position.

14. The hand vacuum cleaner of claim 1 wherein, in operation, the hand vacuum cleaner further comprises a pre-motor filter and an axis extending in a common direction to the hand vacuum cleaner axis extends through the dirt collection chamber below the cyclone chamber and the pre-motor filter.

15. The hand vacuum cleaner of claim 1 wherein, in operation, an energy storage member housing is positioned at the lower end of the hand vacuum cleaner and an axis extending in a common direction to the hand vacuum cleaner axis extends through the dirt collection chamber below the cyclone chamber and the energy storage member housing.

16. The hand vacuum cleaner of claim 15 wherein, in operation, the hand vacuum cleaner further comprises a pre-motor filter and the axis extending in a common direction to the hand vacuum cleaner axis extends through the pre-motor filter.

17. The hand vacuum cleaner of claim 16 wherein, in operation, the energy storage member housing is positioned at a lower end of the handle.

18. The hand vacuum cleaner of claim 1 wherein the first cyclone air outlet is provided in the first end wall and a second cyclone air outlet is provided in the second end wall and the dirt outlet comprises a transversely extending opening in the cyclone sidewall at a position between the first and second cyclone air outlets.

19. The hand vacuum cleaner of claim 18 wherein each of the first and second cyclone air outlets comprises a vortex finder.

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