Surface cleaner

Abstract

A surface cleaner has a body, a suction source, a suction inlet, and a recovery tank. The recovery tank receives and stores a recovered liquid that is drawn from a surface through the suction inlet by the suction source. The recovery tank has an inlet channel fluidly connected to the suction inlet, a plenum, a cyclone chamber, and an outlet channel. The inlet channel receives the recovered liquid and air from the suction inlet. The plenum is fluidly connected to the inlet channel. The plenum receives the recovered liquid and air from the inlet channel. The cyclone chamber receives the recovered liquid and air from the plenum through one or more passages positioned along the outer wall of the plenum. The outlet channel is fluidly connected to the cyclone chamber and the suction source and directs air from the cyclone chamber to the suction source.

Description

Attorney Docket No. 025818-0165-W001SURFACE CLEANER CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims priority to U.S. Provisional Patent Application No.63 / 745,981, filed January 16, 2025, the entire contents of which are hereby incorporated by reference herein.BACKGROUND

[0002] The present disclosure relates to surface cleaners, and more particularly to a recovery tank for a surface cleaner.SUMMARY

[0003] In one embodiment, a surface cleaner has a body, a suction source, a suction inlet in fluid communication with the suction source, and a recovery tank coupled to the body. The recovery tank is configured to receive and store a recovered liquid drawn from a surface through the suction inlet by the suction source. The recovery tank includes a first end, a second end opposite the first end, a sidewall extending between the first end and the second end, an inlet channel fluidly connected to the suction inlet, a plenum, a cyclone chamber, and an outlet channel. The inlet channel is configured to receive the recovered liquid and air from the suction inlet. The plenum is fluidly connected to the inlet channel. The plenum is adjacent the second end of the recovery tank. The plenum is configured to receive the recovered liquid and air from the inlet channel. One or more passages is positioned along an outer wall of the plenum. The cyclone chamber is fluidly connected to the plenum. The cyclone chamber is configured to receive the recovered liquid and air from the plenum through the one or more passages. The outlet channel is fluidly connected to the cyclone chamber and the suction source. The outlet channel is configured to direct the air from the cyclone chamber to the suction source.

[0004] In another embodiment, a surface cleaner has a body, a suction source, a suction inlet in fluid communication with the suction source, and a recovery tank coupled to the body. The recovery tank is configured to receive and store a recovered liquid that is drawn from a surface being cleaned through the suction inlet by the suction source. The recovery tank has a first end, a second end opposite the first end, and a sidewall that extends between the first end and the secondAttorney Docket No. 025818-0165-W001end. The recovery tank has a first container portion and a secondary container portion separated by the sidewall. The first container portion forms a cyclone chamber defined by the sidewall. The first container portion includes a first fluid collection chamber defined by the sidewall. The secondary container portion defines a second fluid collection chamber positioned outside the sidewall of the recovery tank. The first fluid collection chamber is in fluid communication with the second fluid collection chamber.

[0005] In yet another embodiment, a surface cleaner has a body, a suction source, a suction inlet in fluid communication with the suction source, and a recovery tank coupled to the body. The recovery tank receives and stores a recovered liquid that is drawn from a surface being cleaned through the suction inlet by the suction source. The recovery tank has a first end, a second end opposite the first end, an inlet channel, an outlet channel, and a shutoff float. The inlet channel is fluidly connected to the suction inlet. The inlet channel is configured to receive the recovered liquid and air from the suction inlet. The outlet channel is fluidly connected to the inlet channel and the suction source. The outlet channel is configured to direct the air from the recovery tank to the suction source. The outlet channel has an outlet opening that allows air to enter the outlet channel. The shutoff float is configured to float on a surface of the recovered liquid within the recovery tank and inhibit air from flowing into the outlet channel of the recovery tank when a surface of the recovered liquid within the recovery tank reaches a desired level. The shutoff float has a float body and shutoff area connected to the float body by a hinge. The shutoff area is configured to cover the outlet opening to inhibit air from flowing into the outlet channel. The hinge is configured to flex to cause the shutoff area to cover the outlet opening when a predetermined force is applied to the hinge. The hinge is configured to resist flexing when a force less than the predetermined force is applied to the hinge.

[0006] Other aspects of the disclosure will become apparent by consideration of the detailed description and accompanying drawings.BRIEF DESCRIPTION OF THE DRAWINGS

[0007] FIG. l is a perspective view of a surface cleaner according to one embodiment.

[0008] FIG. 2 is a perspective view of the recovery tank of FIG. 1.Attorney Docket No. 025818-0165-W001

[0009] FIG. 3 is a section view of the recovery tank of FIG. 2.

[0010] FIG. 4 is a top section view of the recovery tank taken at the line C-C of FIG. 3.

[0011] FIG. 5A is a top section view of the recovery tank taken at the line A-A of Fig. 3.

[0012] FIG. 5B is a top section view of the recovery tank taken at the line B-B of Fig. 3.

[0013] FIG. 6 is a section view of the recovery tank of FIG. 2 according to another embodiment including a filter.

[0014] FIG. 7 is a top section view of the recovery tank taken through the filter of FIG. 6.

[0015] FIG. 8 is a perspective view of a recovery tank according to another embodiment.

[0016] FIG. 9 is an exploded perspective view of the recovery tank of FIG. 8.

[0017] FIG. 10 is an exploded view of the plenum of the recovery tank of FIG. 8.

[0018] FIG. 11 is a section view of the recovery tank of FIG. 8, wherein the shutoff float is in the low position.

[0019] FIG. 12 is a section view of the recovery tank of FIG. 8, wherein the shutoff float is in the raised position.

[0020] FIG. 13 is a perspective view of the recovery tank of FIG. 8 with a portion of the sidewall removed, detailing the outlet opening and the shutoff float.

[0021] FIG. 14 is a perspective view of the shutoff float of FIG. 8.

[0022] FIG. 15A is a detailed view of the shutoff float in an open position.

[0023] FIG. 15B is a detailed view of the shutoff float in a closed position.

[0024] FIG. 16 is a section view of a recovery tank according to another embodiment.

[0025] FIG. 17 is an exploded section view of the recovery tank of FIG. 16.Attorney Docket No. 025818-0165-W001

[0026] FIG. 18 is a front view of the wave inhibitors of the recovery tank of FIG. 17.

[0027] FIG. 19 is a perspective view of a recovery tank according to one embodiment.

[0028] FIG. 20 is a perspective section view of the recovery tank of FIG. 19.

[0029] FIG. 21 is a section view of the recovery tank of FIG. 19.

[0030] FIG. 22 is a perspective view of a surface cleaner according to one embodiment.

[0031] FIG. 23 is a section view of a recovery tank according to another embodiment.

[0032] FIG. 24 is a section view of a recovery tank according to another embodiment.

[0033] FIG. 25 is a section view of a recovery tank according to another embodiment.

[0034] Before any embodiments of the disclosure are explained in detail, it is to be understood that the disclosure is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The disclosure is capable of other embodiments and of being practiced or of being carried out in various ways.DETAILED DESCRIPTION

[0035] FIG. 1 illustrates a surface cleaner 10 according to one embodiment. The surface cleaner 10 is a wet surface cleaner, such as a spot cleaner, carpet or hard floor cleaner, extractor, or the like, that delivers a liquid to a surface to be cleaned. The surface cleaner 10 includes a body 14, a suction source 18, a supply tank 22, a spray nozzle 26, a suction inlet 30, an exhaust outlet 31, and a recovery tank 34. In some embodiments, the cleaner 10 includes a controller 38. The body 14 includes a base 42 supporting the surface cleaner 10 on a surface, such as the surface to be cleaned, and a handle 46 that allows a user to carry and maneuver the surface cleaner 10.

[0036] The supply tank 22 is removably coupled to and supported by the base 42. The supply tank 22 holds a liquid (e.g., a cleaning liquid such as water and / or a detergent or solution). In use, the liquid can be dispensed onto the surface to be cleaned through the spray nozzle 26, or liquid distributor. The suction source 18 is configured to generate a suction airflow along an airpathAttorney Docket No. 025818-0165-W001between the suction inlet 30 and the exhaust outlet 31. The suction inlet 30 is in fluid communication with the recovery tank 34 and the suction source 18 along the airpath. In use, the suction source 18 generates a suction airflow to draw liquid and debris from the surface being cleaned through the suction inlet 30 and into the recovery tank 34. A suction air path extends between the suction inlet 30 and the suction source 18. The recovery tank 34 is removably coupled to and supported by the base 42 of the body 14. The recovery tank 34 receives and stores the debris and liquid drawn up and recovered from the surface being cleaned. The recovery tank 34 is structured to hold a predetermined operating amount of liquid. The predetermined operating amount of liquid fills the recovery tank 34 to a full-tank liquid line. In the illustrated embodiment, the surface cleaner 10 includes a static brush cleaning tool 32 adjacent the suction inlet 30. In some embodiments, the cleaning tool 32 may be an agitating brush, a spot cleaning tool, or another type of accessory cleaning tool.

[0037] FIGS. 2-7 illustrate the recovery tank 34 in detail according to one embodiment. The recovery tank includes a first end 50 and a second end 54 opposite the first end 50. The first end 50 is a bottom end of the recovery tank 34, and the second end 54 is a top end of the recovery tank 34. The recovery tank 34 includes a generally cylindrical shape formed by a sidewall 36 that is curved. The sidewall 36 extends between the first end 50 and the second end 54. The recovery tank 34 includes a main or first container portion 35 and a secondary container portion 37 that are separated by the sidewall 36. The main container portion 35 is cylindrical and has a central axis CL1.

[0038] With reference to FIGS. 2-3, the recovery tank 34 includes an inlet channel 58, a plenum 62, a cyclone chamber 66, and an outlet channel 70. The inlet channel 58 is fluidly connected to the suction inlet 30. In use, the inlet channel 58 receives the recovered liquid, debris, and air from the suction inlet 30. The inlet channel 58 includes a recovery tank inlet 74 and a connection tube 78 which connects the recovery tank inlet 74 to the plenum 62. The recovery tank inlet 74 is positioned at the first end 50 of the recovery tank 34. The recovery tank inlet 74 is positioned along the central axis CL1. The connection tube 78 is a vertical tube and extends from the first end 50 toward the second end 54. The connection tube 78 extends along the central axis CL1.Attorney Docket No. 025818-0165-W001

[0039] The plenum 62 is fluidly connected to the inlet channel 58. The plenum 62 is located adjacent the second end 54 of the recovery tank 34 inside the main container portion 35 and is at least partially positioned within the cyclone chamber 66. In use, the plenum 62 receives the recovered liquid, debris, and air from the inlet channel 58.

[0040] The plenum 62 includes an extension tube 62a, a diffuser 62b, and an outer wall 62c that is curved. The extension tube 62a is releasably connected to the connection tube 78 of the inlet channel 58. In one embodiment, the extension tube 62a is omitted and the connection tube 78 is releasably connected to the diffuser 62b. The extension tube 62a extends along the central axis CL1 concentric with the connection tube 78. The ends of the extension tube 62a and the connection tube 78 may have a securing mechanism, such as a friction fit or threads, which secures the connection tube 78 to the extension tube 62a. The connection may include an O-ring or other seal. The extension tube 62a and the connection tube 78 form a central column 80 within the recovery tank 34.

[0041] The diffuser 62b is positioned above the extension tube 62a. The diffuser 62b is an inverted cone. The radius of the diffuser 62b, measured from the central axis CL1, increases in length as the diffuser 62b extends in the upward direction. A flow guide 63 is positioned in the diffuser 62b. The flow guide 63 is spaced from the diffuser 62b. The flow guide 63 has a similar shape as the diffuser 62b and is also an inverted cone. The radius of the flow guide 63, measured from the central axis CL1, increases as the flow guide 63 extends in the upward direction. A diffuser passage 67 is defined between the flow guide 63 and the diffuser 62b. The diffuser passage 67 has a generally increasing diameter in the inlet direction. The increasing diameter of the diffuser passage 67 reduces the velocity of the recovered liquid, debris, and air flowing from the extension tube 62a through the diffuser passage 67.

[0042] The outer wall 62c is a curved wall offset from the sidewall 36 and has a uniform radius. The outer wall 62c includes a plurality of openings or apertures 86 (FIG. 4) that are the outlet of the plenum 62. Vanes 82 are positioned along the outer wall 62c and are adjacent the apertures 86. Each pair of adjacent vanes 82 is positioned around an aperture 86 forming a passage 86a that includes the apertures 86 and outlets to the cyclone chamber 66. More specifically, a gap or space between two adjacent vanes 82 forms a passage 86a between the plenum 62 and theAttorney Docket No. 025818-0165-W001cyclone chamber 66. The outer wall 62c includes twenty apertures 86 and twenty corresponding vanes 82 that form twenty passages 86a between the plenum 62 and the cyclone chamber 66. In some embodiments, the outer wall 62c may include fewer or more apertures 86 and vanes 82. In one embodiment, the plenum 62 includes one passage 86a forming an inlet to the cyclone chamber 66. In one embodiment, the plenum 62 includes three or more passages 86a forming an inlet to the cyclone chamber 66.

[0043] With reference to FIG. 4, the vanes 82 are equally spaced along the outer wall 62c (eg., the outer surface) of the plenum 62. The space between adjacent vanes 82 form the passages 86a between the plenum 62 and the cyclone chamber 66. The passages 86a have a uniform thickness. The passages 86a are angled such that they do not extend in a radial direction from the central axis CL1. A passage axis line 87 extends along each of the passages 86a and defines the central axis of the passage 86a. The passage axis line 87 is not parallel to a radial axis extending from the central axis CL1. Each passage 86a has an angle a defined between the passage axis line 87 and a line 89 tangent to the sidewall 36 of the recovery tank 34, the line 89 being tangent at the point where the passage axis line 87 intersects the sidewall 36. Said another way, the angle a is defined between a formed passage 86a and a line 89 tangent to the sidewall 36 of the cyclone chamber 66, the line 89 being tangent at the point where an extension of the formed passage 86a intersects the sidewall 36. The angle a is at least 130 degrees. In some embodiments, the angle a is greater than 120 degrees. In some embodiments, the angle a is greater than 130 degrees. In some embodiments, the angle a is between 130 and 145 degrees. In some embodiments, the angle a is between 140 and 145 degrees.

[0044] In some embodiments, as shown in FIGS. 6 and 7, there is a filter 90 positioned in the plenum 62 adjacent the vanes 82. The filter 90 may be a screen or a mesh. The filter 90 is configured to collect large debris such as hair and fibers and inhibit the large debris from entering the cyclone chamber 66.

[0045] Returning to FIGS. 2-3, the cyclone chamber 66 is fluidly connected to the plenum 62. The cyclone chamber 66 is positioned in the main container portion 35. The cyclone chamber 66 is partially defined by the sidewall 36 of the recovery tank 34. The cyclone chamber 66 surrounds the plenum 62. A skirt 68 extends around the central axis CL1 extending below the outerAttorney Docket No. 025818-0165-W001wall 62c and the vanes 82 in a direction toward the first end 50 of the recovery tank 34 and offset from the sidewall 36 of the recovery tank 34. In the illustrated embodiment, the skirt 68 is concentric with the plenum outer wall 62c. The cyclone chamber 66 has a dimension T1 between the skirt 68 and the sidewall 36 and / or the outer wall 62c of the plenum 62 and the sidewall 36. The dimension T1 is determined by balancing the reduction in foaming that occurs as the dimension T1 decreases against the increase in pressure drop that also occurs as the dimension T1 of the cyclone chamber 66 decreases, as desired for the application. In use, the cyclone chamber 66 receives the recovered liquid, debris, and air from the plenum 62 through the passage 86a created by adjacent vanes 82. Because the passage 86a is angled, the recovered liquid, debris, and air enter the cyclone chamber 66 at an angle and form a cyclonic flow about the central axis CL1. The centrifugal force from the cyclone separates debris and the recovered liquid from the air.

[0046] The outlet channel 70 is fluidly connected to the cyclone chamber 66 and the suction source 18. The outlet channel 70 is formed by a second tube 88 that surrounds the central column 80 formed by the extension tube 62a of the plenum and / or the connection tube 78. The second tube 88 is concentric with the central column 80 and extends in the direction of the central axis CL1. The top of the second tube 88 has an outlet opening 92 that allows air to enter the outlet channel 70. The outlet opening 92 is positioned above the full-tank liquid line. The outlet channel 70 and the inlet channel 58 are parallel channels. In use, the outlet channel 70 is configured to direct the air from the cyclone chamber 66 to the suction source 18. The air is directed downward toward the first end 50. The outlet channel 70 may include ribs 96 to support the second tube 88 and further direct the air. The ribs 96 extend in the vertical direction.

[0047] As mentioned above, the recovery tank 34 includes a main or first container portion 35 and a secondary container portion 37. The main container portion 35 is cylindrical and includes the plenum 62, the cyclone chamber 66, and a first fluid collection chamber 104. The plenum 62 and the cyclone chamber 66 are positioned at the top end of the main container portion 35 (e.g., the end closest to the second end 54 of the recovery tank 34). The first fluid collection chamber 104 is situated below the cyclone chamber 66 and is at the bottom end of the main container portion 35. The first fluid collection chamber 104 is adjacent the first end 50 of the recovery tank 34. The first fluid collection chamber 104 is continuous with the cyclone chamber 66 and is in fluid communication with the cyclone chamber 66. The sidewall 36 defines the firstAttorney Docket No. 025818-0165-W001fluid collection chamber 104. Said another way, the sidewall 36 defines the outer boarder of the first fluid collection chamber 104. The first fluid collection chamber 104 encompasses the central column 80. The central axis CL1 extends through the center of the first fluid collection chamber 104. In use, the first fluid collection chamber 104 receives and stores the recovered liquid and debris from the cyclone chamber 66.

[0048] The secondary container portion 37 is positioned adjacent the main container portion 35. The secondary container portion 37 defines a second fluid collection chamber 108. The second fluid collection chamber 108 is adjacent the first end 50 of the recovery tank 34 and the first fluid collection chamber 104. Since the second fluid collection chamber 108 is positioned adjacent the first fluid collection chamber 104, the second fluid collection chamber 108 is positioned outside or adjacent the cyclone chamber 66. In the illustrated embodiment, the second fluid collection chamber 108 is crescent shaped. The second fluid collection chamber 108 is defined outside of the sidewall 36 that defines the first fluid collection chamber 104. The second fluid collection chamber 108 includes a central axis CL2. In the illustrated embodiment, the second fluid collection chamber 108 is smaller than the first fluid collection chamber 104. In some embodiments, the second fluid collection chamber 108 may be the same size as the first fluid collection chamber 104. In some embodiments, the second fluid collection chamber 108 is larger than the first fluid collection chamber 104.

[0049] The first fluid collection chamber 104 is contiguous with the second fluid collection chamber 108 and share a common boarder formed by the sidewall 36. The first fluid collection chamber 104 is defined by the sidewall 36, while the second fluid collection chamber 108 is positioned outside the sidewall 36. The first fluid collection chamber 104 is on a first side of the sidewall 36, while the second fluid collection chamber 108 is positioned on a second opposite side of the sidewall 36. The central axis CL1 of the first fluid collection chamber 104 is offset from the central axis CL2 of the second fluid collection chamber 108. The central axis CL2 is positioned radially outward from the central axis CL1 and the first fluid collection chamber 104.

[0050] Additionally, with reference to FIGS. 5 A and 5B, the first fluid collection chamber 104 is in fluid communication with the second fluid collection chamber 108 through an opening 112. The fluid communication allows the recovered liquid and debris to flow from the first fluidAttorney Docket No. 025818-0165-W001collection chamber 104 to the second fluid collection chamber 108. The sidewall 36 that separates the first fluid collection chamber 104 from the second fluid collection chamber 108 includes the opening 112. The opening 112 in the sidewall 36 fluidly connects the first fluid collection chamber 104 to the second fluid collection chamber 108. The opening 112 is positioned at the first end 50 of the recovery tank 34 and extends toward the second end 54.

[0051] As illustrated in FIGS. 5A,5B, and 20, the opening 112 includes a first portion 112 having a first height and a second portion 112a having a second height. The height of the first portion of the opening 112 (e.g., the distance the opening extends between the first end 50 and the second end 54) is selected to enable free flow of fluid into the second fluid collection chamber 108. In one embodiment, the height of the first portion of the opening 112 is at least about one quarter of the height of the second fluid collection chamber 108 (e.g., the maximum distance the second fluid collection chamber 108 extends between the first end 50 and the second end 54). In some embodiments, the height of the first portion of the opening 112 may be more than one third the height of the second fluid collection chamber 108. In some embodiments, the height of the opening 112 may be less than one quarter of the height of the second fluid collection chamber 108. As illustrated by the section views in FIGS. 5A and 20, the second portion of the opening 112a includes a height greater than the height of the first portion 112. The height of the second portion of the opening 112a allows air that enters the second fluid collection chamber 108 to exit when the level of the recovered liquid and debris is higher than the height of the first portion of the opening 112. The height of the second portion of the opening 112a may be selected to enable continued air flow between the first and second fluid collection chambers 104, 108 when the recovery tank 34 is full, as desired for the application. Stated another way, the height of the second portion of the opening 112a may be higher than a tank-full liquid height along the sidewall 36. The tank-full liquid height is defined by the upper surface of the recovered liquid in the first fluid collection chamber 104 when the predetermined operating amount of liquid is in the recovery tank 34.

[0052] In use, the recovered liquid flows from the first fluid collection chamber 104 to the second fluid collection chamber 108 via the opening 112. In some embodiments, such as an upright extractor shown in FIG. 22, the recovery tank 34, 4034 may be mounted to the upright handle 4046 such that the tank will be tilted in use as the handle 4046 is pivoted rearwardly. More specifically, when a user tilts the recovery tank 34 in the clockwise direction (as viewed when theAttorney Docket No. 025818-0165-W001recovery tank 34 is positioned in the orientation shown in FIG. 3) such that the second fluid collection chamber 108 is lower than the first fluid collection chamber 104, the recovered liquid and debris flows from the first fluid collection chamber 104 to the second fluid collection chamber 108 through the opening 112. The second fluid collection chamber 108 allows the recovered liquid to flow out of the first fluid collection chamber 104 and main container portion 35 increasing the capacity of the recovery tank 34. Additionally, the second fluid collection chamber 108 may reduce sloshing and foaming in the first fluid collection chamber 104 by reducing the fluid level in the first fluid collection chamber 104.

[0053] Turning back to FIGS. 2 and 3, the recovery tank 34 further includes a lid 100 removably coupled to the main container portion 35 and defining a top surface of the recovery tank 34. The lid 100 is removable to open the recovery tank 34 to allow for emptying, cleaning, and maintenance of the recovery tank 34. In the illustrated embodiment, the plenum 62 and the skirt 68 are attached to and removable with the lid 100.

[0054] Turning to FIGS. 6-7, the recovery tank 34 further includes a shutoff float 114 and wave inhibitors 118. In use, the shutoff float 114 floats on a surface of the recovered liquid in the recovery tank 34 and configured to inhibit air from flowing into the outlet channel 70 when the surface of the recovered liquid reaches a desired level or the full-tank liquid line. In use, the wave inhibitors 118 engage the top of the recovered liquid in the recovery tank 34 to settle the surface when the surface of the recovered liquid reaches a level sufficient to contact the wave inhibitors 118. The shutoff float 114 and the wave inhibitors 118 will be discussed in detail below with regards to different embodiments, however their description and function are similar in all embodiments unless otherwise noted.

[0055] FIGS. 8- 15b illustrate another embodiment of a recovery tank 1034 according to the present disclosure, with like features having like reference numerals one thousand higher than the original embodiment of the recovery tank 34. The recovery tank 1034 is similar to the recovery tank 34, but it does not include a second fluid collection chamber.

[0056] With reference to FIGS. 8 and 11, the recovery tank 1034 has a first end 1050 and a second end 1054. The recovery tank 1034 includes an inlet channel 1058, a plenum 1062 having an outer wall 1062c with a plurality of openings or apertures 1086, a cyclone chamber 1066, anAttorney Docket No. 025818-0165-W001outlet channel 1070, vanes 1082, a lid 1100, a fluid collection chamber 1104, a shutoff float 1114, and wave inhibitors 1118. The wave inhibitors 1118, discussed in more detail in the next embodiment, are attached to the skirt 1068 and are positioned along the sidewall of the recovery tank 1034. The recovery tank 1034 has a main container portion 1035 with a generally cylindrical shape defined by a sidewall 1036.

[0057] With reference to FIGS. 9 and 10, the plenum 1062 and the skirt 1068 are attached to and removable from the main container portion 1035 with the lid 1100. FIG. 9 illustrates the lid 1100 with the plenum 1062 and the skirt 1068 removed from the main container portion 1035 to empty the recovery tank 1034. The lid 1100 is also removably coupled to the plenum 1062. FIG. 10 illustrates the lid 1100 removed from the plenum 1062 to allow access to the plenum 1062 and to clean or maintain the vanes 1082.

[0058] FIGS. 11-15B illustrate the shutoff float 1114 in detail. As discussed above, in use, air from the cyclone chamber 1066 enters the outlet channel 1070 through an outlet opening 1092. The outlet channel 1070 directs the air to the suction source 18 (FIG. 1). The shutoff float 1114 covers the outlet opening 1092 when the amount of recovered liquid in the recovery tank 1034 lifts the shutoff float 1114 to a desired shut-off level. The shutoff float 114 is at the desired shut-off level when the surface of recovered liquid in the tank is at the tank-full liquid line. This inhibits air, and potentially the recovered liquid, from entering the outlet channel 1070 and reaching the suction source 18 when the tank is full of liquid.

[0059] With reference to FIG. 13, the outlet opening 1092 has a generally rectangular shape. In the illustrated embodiment, the outlet opening 1092 is curved. The outlet opening 1092 has a length LI and a height Hl. The length LI and the height Hl define a cross-sectional area of the outlet opening 1092. The illustrated embodiment includes two outlet openings 1092 on opposite sides of the second tube 1088 that forms the outlet channel 1070. In some embodiments, the recovery tank 1034 may have more or fewer outlet openings 1092 spaced around the second tube 1088.

[0060] The shutoff float 1114 is positioned around the second tube 1088 that forms the outlet channel 1070. The shutoff float 1114 floats on the surface of the recovered liquid and rises as the amount of recovered liquid in the recovery tank 1034 increases. The shutoff float 1114 risesAttorney Docket No. 025818-0165-W001from a lowered position (e.g., a first position), shown in FIG. 11, to a raised position (e.g., a second position), shown in FIG. 12. The shutoff float 1114 is in the lowered position when there is no recovered liquid in the recovery tank 1034. The shutoff float 1114 reaches the raised position when the recovery tank 1034 is full and a predetermined operating amount of liquid is in the recovery tank 1034. The second tube 1088 includes a stop 1122 (FIG. 13) positioned to limit how high the shutoff float 1114 can rise.

[0061] With reference to FIG. 14, the shutoff float 1114 includes a float body 1123, a float guide 1124 extending from the float body 1123, and a shutoff area 1126 connected to the float guide 1124 by a hinge 1130. The float body 1123 is positioned around the second tube 1088 and allows the shutoff float 1114 to move vertically along the second tube 1088 as the amount of recovered liquid in the recovery tank 1034 increases. The float body 1123 may be a collar. The float guide 1124 extends from the float body 1123 and helps guide and stabilize the float body 1123 on the second tube 1088. The float guide 1124 extends in the upward direction (e.g., toward the second end 1054 of the recovery tank 1034). The shutoff area 1126 is located at the upper end of the float guide 1124 and is connected to the float guide 1124 by a hinge 1130. As discussed below in detail, the hinge 1130 flexes under pressure to move the shutoff area 1126 such that it covers the outlet opening 1092 (FIG. 13). The shutoff area 1126 blocks airflow when it covers the outlet opening 1092 inhibiting flow of air and liquid into the recovery tank. The illustrated embodiment includes two float guides 1124 each having a shutoff area 1126 such that both outlet openings 1092 are covered. In other embodiments, the number of float guides 1124 is increased or decreased based on the number of outlet openings 1092.

[0062] The shutoff area 1126 has a generally rectangular shape. In the illustrated embodiment, the shutoff area 1126 is curved. The shutoff area 1126 has a length L2 and a height H2. The length L2 and the height H2 define the total area of the shutoff area 1126. The total area of the shutoff area 1126 may be larger than the area of the outlet opening 92 such that the shutoff area 1126 can completely cover the outlet opening 92. The length L2 of the shutoff area 1126 is longer than the length LI of the outlet opening 1092. The height H2 of the shutoff area 1126 is larger than the height Hl of the outlet opening 1092. In some embodiments, the total area of the shutoff area 1126 is the same size as or smaller than the area of the outlet opening 92. In someAttorney Docket No. 025818-0165-W001embodiments, the length L2 and height H2 of the shutoff area 1126 are the same as the length LI and height H2 outlet opening 1092.

[0063] The hinge 1130 is a living hinge configured to resist flexing until a predetermined force is applied to the hinge. The hinge 1130 flexes to cause the shutoff area 1126 to cover the outlet opening 1092 in response to the predetermined force being applied to the hinge by suction from the suction source 18. The force causes the hinge 1130 to flex inward (e.g., toward the second tube 1088 or toward the outlet opening 1092). The amount of force the hinge 1130 experiences is a function of the area of the shutoff area 1126 that is exposed to the outlet opening 1092. The predetermined amount of force needed to flex the hinge 1130 corresponds to a predetermined amount of the shutoff area 1126, a predetermined exposed area, being exposed to or facing the outlet opening 1092 as the shutoff float 1114 rises with the surface of the recovered liquid in the recovery tank 1034. In one embodiment, the predetermined exposed area of the shutoff area 1126 is 75% of the total area of the outlet opening 1092. In some embodiments, the predetermined exposed area of the shutoff area 1126 is between 75% and 100% of the total area of the outlet opening 1092. In some embodiments, the predetermined exposed area of the shutoff area 1126 is between 80% and 100% of the total area of the outlet opening 1092. In some embodiments, the predetermined exposed area of the shutoff area 1126 is between 90% and 100% of the total area of the outlet opening 1092. The living hinge 1130 resists flexing when the force applied to the hinge 1130 is less than the predetermined force. The hinge 1130 resists flexing until the predetermined force is applied to the hinge 1130 by the predetermined exposed area being exposed to the outlet opening 1092 to inhibit the shutoff area 1126 moving to cover the outlet opening 1092 before the shutoff float 1114 is positioned at the desired shut-off level.

[0064] The predetermined force needed to flex the hinge 1130 to have the shutoff area 1126 cover the outlet opening 1092 is determined by one or more of the elements from the group consisting of: the hinge thickness T3, the hinge height H3, the hinge length L3, the hinge shape, and / or the hinge material.

[0065] FIG. 15A illustrates the shutoff float 1114 when the hinge 1130 is not flexed and the shutoff area 1126 does not cover the outlet opening 1092. Said another way, FIG. 15A illustrates the shutoff float 1114 in an open position such that air can flow into the outlet channelAttorney Docket No. 025818-0165-W0011070 via the outlet opening 1092. This occurs when there is no suction or when the suction force applied to the shutoff area 1126 has not reached the predetermined flex force. FIG. 15B illustrates the shutoff float 1114 when the hinge 1130 is flexed and the shutoff area 1126 covers the outlet opening 1092. Said another way, FIG. 15B illustrates the shutoff float 1114 in a closed position inhibiting airflow into the outlet channel 1070 via the outlet opening 1092. This occurs when the surface of the recovered liquid in the recovery tank 1034 has reached a desired height and a sufficient portion of the shutoff area 1126 is exposed to the outlet opening 1092. The desired height is a height that is sufficient for the shutoff area 1126 to cover an amount of the outlet opening 1092 desired for the application when the recovery tank 1034 is full and the upper surface of the recovered liquid is at the full-tank liquid line.

[0066] FIGS. 16-18 illustrate another embodiment of a recovery tank 2034 according to the present disclosure, with like features having like reference numerals two thousand higher than the original embodiment of the recovery tank 34. The recovery tank 2034 is similar to the recovery tank 34, but it does not include a shutoff float or the second fluid collection chamber.

[0067] The recovery tank 2034 includes a first end 2050 and a second end 2054. The recovery tank 2034 includes an inlet channel 2058, a plenum 2062, a skirt 2068, a cyclone chamber 2066, an outlet channel 2070, vanes 2082, a lid 2100, and the wave inhibitors 2118. The recovery tank 2034 has a main container portion 2035 with a generally cylindrical shape defined by a sidewall 2036. The recovery tank 2034 includes a central axis CL3.

[0068] FIG. 17 illustrates the lid 2100 with the plenum 2062 removed from the main container portion 2035 of the recovery tank 2034.

[0069] Unlike recovery tanks 34 and 1034, where the wave inhibitors 118, 1118 are attached to the skirt 68, 1068, the wave inhibitors 2118 in the recovery tank 2034 are attached to the second tube 2088 of the outlet channel 2070 in the fluid collection chamber 2104. The wave inhibitors 2118 are positioned in the recovery tank 2034, specifically in the fluid collection chamber 2104 along the sidewall 2036 and adjacent the outlet opening 2092 of the outlet channel 2070. The wave inhibitors 2118 are at a height that is lower than the outlet opening 2092 and generally at a height related to the tank-full liquid line. In one embodiment, the wave inhibitors 2118 are positioned above the tank-full liquid line. In one embodiment, the wave inhibitors 2118Attorney Docket No. 025818-0165-W001are positioned lower than the tank-full liquid line. In one embodiment, the wave inhibitors 2118 are positioned at the tank-full liquid line.

[0070] FIG. 18 illustrates the wave inhibitors 2118 in detail. Each wave inhibitor 2118 is formed by a paddle 2134 (e g., an angled blade). While the wave inhibitors 118, 1118 in the prior embodiments were attached to the skirt 68 1068, in the illustrated embodiment the wave inhibitors 2118 are attached to and extend radially outwardly from a body 2133 configured to secure the wave inhibitors 2118 to the second tube 2088 (FIG. 17). The body 2133 may be a collar. The paddles 2134 extend radially outwardly into the recovery tank 2034 and more specifically into the fluid collection chamber 2104. The illustrated recovery tank 2034 includes four wave inhibitors 2118 that are evenly spaced around the body 2133. The paddles 2134 may extend to the inner wall of the cyclone chamber 2066 such that the paddles 2134 contact the inner wall of the cyclone chamber 2066. In some embodiments, the recovery tank 2034 includes fewer or more wave inhibitors 2118. In some embodiments, the wave inhibitors 2118 are omitted.

[0071] The paddles 2134 extend radially outwardly into the fluid collection chamber 2104 and in the downward direction (e.g., in the direction toward the first end 2050). More specifically, the paddles 2134 are angled in a first downward direction and in a second downward direction. The first downward direction is a downward direction relative to a radius of the cyclone chamber 2066 or the recovery tank 2034. The line 2144 extends in the first downward direction. The paddle 2134 is angled such that an end 2134a of the paddle 2134 that positioned closest to the center axis CL3 is higher (e.g., closer to the second end 2054) than an end 2134b of the paddle that is furthest from the center axis CL3. Said another way, a radial inward end 2134a is higher than the radial outward end 2134b of the paddle 2134. Because the paddle 2134 is angled in a downward direction relative to a radius of the cyclone chamber 2066, recovered liquid rotating around the center axis CL3 that contacts the lower surface 2134c of the paddle 2134 is directed downward and radially outward toward the outer wall (e.g., the sidewall 2036) of the recovery tank 2034. The paddle 2134 forms an angle b between a plane 2148 that is perpendicular to the center axis CL3 and the line 2144 extending in the first downward direction that the paddle 2134 is angled. In the illustrated embodiment, the angle b is 20 degrees. In some embodiments, the angle b is between 5 and 30 degrees. In some embodiments, the angle b is between 15 and 25 degrees.Attorney Docket No. 025818-0165-W001

[0072] The paddle 2134 is angled in a second downward direction. The second downward direction is a downward direction relative to a tangent of the outer surface of the recovery tank 2034. The tangent is a horizontal tangent. The line 2136 extends in the second downward direction in the direction of fluid flow as the recovered liquid rotates around the central axis CL3. The paddle 2134 is angled such that an upstream or first edge 2134d of the paddle 2134 is higher than a downstream or second edge 2134e of the paddle 2134. Because the paddle 2134 is angled in a downward direction relative to a tangent of the outer surface of the recovery tank 2034, recovered liquid rotating around the center axis CL3 that contacts the lower surface 2134c of the paddle 2134 is directed downward and in a direction tangential to the outer surface of the recovery tank 2034. The tangential direction is perpendicular to a radial axis extending from the central axis CL3. An angle c is formed between the line 2136 that extends along the surface of the paddle 2134 in the downward direction and a plane 2140 that is perpendicular to the central axis CL3. The plane 2148 is parallel to and spaced from the plane 2140. The angle c is 10 degrees. In some embodiments, the angle c is between 5 and 20 degrees. In some embodiments, the angle c is between 5 and 15 degrees.

[0073] As mentioned above, the paddle 2134 is angled in a first downward direction and a second downward direction. In some embodiments, the paddle 2134 is only angled in the first downward direction. In some embodiments, the paddle 2134 is only angled in the second downward direction.

[0074] In use, the wave inhibitors 2118 engage the top of the surface of the recovered liquid and help settle the surface by reducing the foam and splashing as the surface of the recovered liquid contacts the lower surfaces 2134c of the paddles 2134 as the liquid moves around the center axis CL3. Reduced wave motion and splashing helps reduce the amount of recovered liquid entering the outlet opening 2092 and flowing into the outlet channel 2070. The wave inhibitors 2118 engage the surface of the recovered liquid as the surface nears the height of the outlet opening 2092. The wave inhibitors 2118 may be helpful to settle the surface of the recovered liquid in the recovery tank 2034 in surface cleaners that have rapid changes in airflow (e.g., surface cleaners that use a hose) and cleaners with movement such as upright extractors.Attorney Docket No. 025818-0165-W001

[0075] Although the recovery tank 2034 does not include a shutoff float, the surface cleaner 10 may have a different means of preventing the recovered liquid from entering the outlet channel 2070 when the amount of recovered liquid in the recovery tank 3034 is the same as the predetermined operating amount of liquid. In one embodiment, the surface cleaner 10 includes a sensor (e.g., a water height sensor, moisture sensor, pressure sensor, or the like) that monitors an attribute correlated to or corresponding to the amount of recovered liquid within the recovery tank 2034. The sensor is in communication with the controller 38 (FIG. 2) and sends a signal to the controller 38 indicative of an amount of recovered liquid in the recovery tank. The controller 38 turns off the suction source 18 (FIG. 2) when the amount of liquid in the recovery tank reaches a predetermined level.

[0076] FIGS. 19-21 illustrate another embodiment of a recovery tank 3034 according to the present disclosure, with like features having like reference numerals three thousand higher than the original embodiment of the recovery tank 34. The recovery tank 3034 is similar to the recovery tank 34 but is taller and narrower.

[0077] The recovery tank 3034 includes a first end 3050 and a second end 3054. The recovery tank 3034 includes an inlet channel 3058, a plenum 3062, a skirt 3068, a cyclone chamber 3066, an outlet channel 3070, vanes 3082, and an outlet cap 3138. The recovery tank 3034 also includes a first fluid collection chamber 3104 and a second fluid collection chamber 3108 separated by a sidewall 3036.

[0078] The tall and narrow shape of the recovery tank 3034 may cause increased velocities in the cyclone chamber 3066. Increased velocities can draw recovered liquid in a direction toward the second end 3054 of the recovery tank 3034 along the second tube 3088 of the outlet channel 3070. The outlet cap 3138 is attached to the second tube 3088 adjacent the outlet opening 3092. The outlet opening 3092 is closer to the second end 3054 than the first end 3050. The outlet cap 3138 includes a flared portion 3142 that extends outwardly into the first fluid collection chamber 3104. The outlet cap 3138 inhibits the recovered liquid from traveling upwardly along the second tube 3088. The outlet cap 3138 also diverts the airflow away from the second tube 3088 to limit the height that the recovered liquid can travel toward the outlet opening 3092.Attorney Docket No. 025818-0165-W001

[0079] Although the recovery tank 3034 does not include a shutoff float, the surface cleaner 10 may have a different means of preventing the recovered liquid from entering the outlet channel 3070 when the amount of recovered liquid in the recovery tank 3034 is the same as the predetermined operating amount of liquid. In one embodiment, the surface cleaner 10 includes a sensor (e.g., a water height sensor, moisture sensor, pressure sensor, or the like) that monitors an attribute correlated to or corresponding to the amount of recovered liquid within the recovery tank 3034. The sensor is in communication with the controller 38 (FIG. 2) and sends a signal to the controller 38 indicative of an amount of recovered liquid in the recovery tank. The controller 38 turns off the suction source 18 (FIG. 2) when the amount of liquid in the recovery tank reaches a predetermined level.

[0080] FIG. 22 illustrates another embodiment of a surface cleaner 4010 according to the present disclosure, with like features having like reference numerals four thousand higher than the original embodiment of the surface cleaner 4010. The surface cleaner 4010 is similar to the surface cleaner 10 but is an upright surface cleaner.

[0081] The surface cleaner 4010 includes a body 4014, a suction source 4018, a supply tank 4022, a spray nozzle (not shown), suction inlet 4030, and a recovery tank 4034. The body 4014 includes a base 4042 and a handle 4046. The handle 4046 is an upright handle that is reclined during use. The supply tank 4022 and the recovery tank 4034 are attached to the handle 4046.

[0082] The recovery tank 4034 is similar to the recovery tank 34 and includes a first fluid collection chamber (not shown) and a second fluid collection chamber (not shown). In use, when the recovery tank 4034 is attached to the upright handle 4046 that is reclined during use, the second fluid collection chamber is lower than the first fluid collection chamber such that the recovered liquid flows from the first fluid collection chamber to the second fluid collection chamber. The second fluid collection chamber allows water to flow out of the cyclone chamber such that it increases the capacity of recovery tank and reduces the formation of foam in the first fluid collection chamber. In some embodiments, the recovery tank 34 is similar to the recovery tank 3034. In some embodiments, the recovery tank 4034 is attached to the base 4042. In some embodiments, the recovery tank 4034 is similar to the recovery tank 1034 or the recovery tank 2034.Attorney Docket No. 025818-0165-W001

[0083] FIG. 23 illustrates a recovery tank 5034 that may be similar to and includes features described with respect to the recovery tanks 34, 1034, 2034, or 3034. The recovery tank 5034 has a first end 5050 and a second end 5054. The recovery tank inlet 5074 is positioned at the first end 5050, and the recovery tank outlet 5072 is positioned at the second end 5054.

[0084] FIG. 24 illustrates a recovery tank 6034 that may be similar to and includes features described with respect to the recovery tanks 34, 1034, 2034, or 3034. The recovery tank 6034 has a first end 6050 and a second end 6054. The recovery tank inlet 6074 is positioned at the second end 6054, and the recovery tank outlet 6072 is positioned at the first end 6050.

[0085] FIG. 25 illustrates a recovery tank 7034 that may be similar to and includes features described with respect to the recovery tanks 34, 1034, 2034, or 3034. The recovery tank 7034 has a first end 7050, a second end 7054, and a centerline CL7. The tank inlet 7074 and the tank outlet 7072 are at the first end 7050. The inlet channel 7078 of the recovery tank 7034 includes a first portion 7078a that is upstream of the recovery tank 7034 and a second portion 7078b that is inside the recovery tank 7034. The first portion 7078a does not extend in a direction parallel to the central axis CL7. The first portion 7078a extends in a direction perpendicular to the central axis CL7. The second portion 7078b extends along the central axis CL7. The outlet channel 7070 includes a first portion 7070a inside the tank and a second portion 7070b that is downstream of the recovery tank 7034. The first portion 7070a extends along the central axis CL7. The second portion 7070b extends in a direction that is not parallel to the central axis CL7. The second portion 7070b extends in a direction perpendicular to the central axis CL7.

[0086] Various features and advantages of the disclosure are set forth in the following claims.

Claims

Attorney Docket No. 025818-0165-W001CLAIMSWhat is claimed is:

1. A surface cleaner comprising:a body;a suction source;a suction inlet in fluid communication with the suction source; anda recovery tank coupled to the body, the recovery tank configured to receive and store a recovered liquid drawn from a surface through the suction inlet by the suction source, the recovery tank including,a first end,a second end opposite the first end,a sidewall extending between the first end and the second end,an inlet channel fluidly connected to the suction inlet, the inlet channel configured to receive the recovered liquid and air from the suction inlet,a plenum fluidly connected to the inlet channel, the plenum adjacent the second end of the recovery tank, the plenum configured to receive the recovered liquid and air from the inlet channel,one or more passages positioned along an outer wall of the plenum, a cyclone chamber fluidly connected to the plenum, the cyclone chamber configured to receive the recovered liquid and air from the plenum through the one or more passages, andan outlet channel fluidly connected to the cyclone chamber and the suction source, the outlet channel configured to direct the air from the cyclone chamber to the suction source.Attorney Docket No. 025818-0165-W0012. The surface cleaner of claim 1 , further comprising a plurality of vanes along the outer wall of the plenum, wherein each of the one or more passages is formed by a gap between adjacent vanes.

3. The surface cleaner of claim 1 or claim 2, wherein the plenum is at least partially positioned in the cyclone chamber.

4. The surface cleaner according to any one of the preceding claims, further comprising a skirt extending from the outer wall offset from the sidewall.

5. The surface cleaner according to any one of the preceding claims, wherein:the inlet channel includes a recovery tank inlet and an inlet channel,the recovery tank inlet is positioned at the first end of the recovery tank, andthe inlet channel connects the recovery tank inlet to the plenum.

6. The surface cleaner according to any one of the preceding claims, wherein the recovery tank inlet is adjacent the first end.

7. The surface cleaner according to any one of the preceding claims, wherein the recovery tank is defined by a container portion and a lid removably coupled to the container portion.

8. The surface cleaner according to claim 7, wherein the plenum is attached to the lid and removable with the lid.

9. The surface cleaner according to any one of claims 2-8, wherein the plenum includes a filter positioned adjacent the plurality of vanes.

10. The surface cleaner according to any one of the preceding claims, further comprising one or more paddles positioned within the recovery tank along the sidewall, wherein the one or more paddles are configured to engage the recovered liquid in the recovery tank when a surface of the recovered liquid within the recovery tank reaches a predetermined level.

11. The surface cleaner of claim 9, further comprising a skirt extending from the outer wall offset from the sidewall, wherein the one or more paddles are attached to the skirt.Attorney Docket No. 025818-0165-W00112. The surface cleaner according to any one of the preceding claims, wherein the one or more paddles extend into the recovery tank and are angled in direction towards the first end of the recovery tank.

13. The surface cleaner of claim 12, wherein:the one or more paddles are angled in a downward direction relative to a tangent of the recovery tank,an angle is formed between a plane that is perpendicular to a central axis of the recovery tank and a line that extends along a surface of the paddle in the downward direction relative to the tangent of the recovery tank, andthe angle is between 5 and 20.

14. The surface cleaner of claim 12, wherein:the one or more paddles are angled in a downward direction relative to a radius of the recovery tank,an angle is formed between a plane that is perpendicular to a central axis of the recovery tank and a line that extends along a surface of the paddle in the downward direction relative to a radius of the recovery tank, andthe angle is between 5 and 30 degrees.

15. The surface cleaner according to any one of the preceding claims, further comprising a shutoff float configured to float on a surface of the recovered liquid within the recovery tank and inhibit air from flowing into the outlet channel of the recovery tank when a surface of the recovered liquid within the recovery tank reaches a desired level.

16. The surface cleaner according to any one of the preceding claims, wherein the surface cleaner comprises a sensor to monitor an attribute indicative of the amount of recovered liquid within the recovery tank and a controller configured to inhibit air from flowing into the outlet channel of the recovery tank when a surface of the recovered liquid within the recovery tank reaches a predetermined level.Attorney Docket No. 025818-0165-W00117. The surface cleaner according to any one of claims 2-16, wherein the outer wall of the plenum is a curved wall offset from the sidewall, and wherein the plurality of vanes is equally spaced around the outer wall of the plenum.

18. The surface cleaner according to any one of claims 2-17, wherein the outer wall of the plenum is a curved wall offset from the sidewall, further comprising a plurality of adjacent vanes and a plurality of passages, the cyclone chamber configured to receive the recovered liquid and air from the plenum through the plurality of passages.

19. The surface cleaner according to any one of claims 2-18, wherein an axis formed by a passage between two adjacent vanes of the plurality of vanes defines an angle relative to a tangent of the cyclone chamber at the point where the axis intersects the sidewall, and the angle is greater than 120 degrees.

20. The surface cleaner of claim 19, wherein the angle is between 140 and 145 degrees.

21. A surface cleaner comprising:a body;a suction source;a suction inlet in fluid communication with the suction source, anda recovery tank coupled to the body, the recovery tank configured to receive and store a recovered liquid that is drawn from a surface being cleaned through the suction inlet by the suction source, the recovery tank having a first end, a second end opposite the first end, and a sidewall extending between the first end and the second end,the recovery tank having a first container portion and a secondary container portion separated by the sidewall;wherein the first container portion forms a cyclone chamber defined by the sidewall, wherein the first container portion includes a first fluid collection chamber defined by the sidewall,wherein the secondary container portion defines a second fluid collection chamber positioned outside the sidewall of the recovery tank,Attorney Docket No. 025818-0165-W001wherein the first fluid collection chamber is in fluid communication with the second fluid collection chamber.

22. The surface cleaner of claim 21, further comprising an opening in the sidewall between the first fluid collection chamber and the second fluid collection chamber such that the recovered liquid can flow from the first fluid collection chamber to the second fluid collection chamber.

23. The surface cleaner of claim 22, wherein the opening is positioned at the first end of the recovery tank.

24. The surface cleaner according to claim 21 or claim 22, wherein the opening extends from the first end toward the second end, wherein the opening has a first portion having a first height and a second portion having a second height, and wherein the second height is greater than the first height.

25. The surface cleaner of claim 24, wherein the recovery tank holds a predetermined operating amount of liquid, the upper surface of the predetermined operating amount of liquid defining a tank-full liquid height along the sidewall, wherein the second height is greater than the tank-full liquid height.

26. The surface cleaner according to any one of claims 21-25, wherein the recovered liquid flows from the first fluid collection chamber to the second fluid collection chamber when the recovery tank is tilted.

27. The surface cleaner according to any one of claims 21-26, wherein the sidewall along the cyclone chamber forms a cylinder.

28. The surface cleaner according to any one of claims 21-27, wherein:the recovery tank further includes an inlet channel fluidly connected to the suction inlet, the inlet channel configured to receive the recovered liquid and air from the suction inlet, the cyclone chamber is fluidly connected to the inlet channel, andthe cyclone chamber configured to receive the recovered liquid and air from the inlet channel.Attorney Docket No. 025818-0165-W00129. The surface cleaner of claim 28, wherein the inlet channel includes a recovery tank inlet adjacent the first end of the recovery tank.

30. The surface cleaner according to claim 28 or claim 29, wherein the recovery tank further includes:a plenum fluidly connected to the inlet channel, the plenum positioned near the second end of the recovery tank, the plenum configured to receive the recovered liquid and air from the inlet channel, andone or more openings positioned along an outer wall of the plenum, the cyclone chamber configured to receive the recovered liquid and air from the plenum through the one or more passages.

31. The surface cleaner of claim 30, wherein the outer wall of the plenum is a curved wall offset from the sidewall, further comprising a plurality of adjacent vanes and a plurality of passages, the cyclone chamber configured to receive the recovered liquid and air from the plenum through the plurality of passages.

32. The surface cleaner according to any one of claims 21-31, wherein the recovery tank further includes one or more paddles positioned within the recovery tank along the sidewall, wherein the one or more paddles are configured to engage the recovered liquid in the recovery tank when a surface of the recovered liquid within the recovery tank reaches a predetermined level.

33. A surface cleaner comprising:a body;a suction source;a suction inlet in fluid communication with the suction source; anda recovery tank coupled to the body, the recovery tank configured to receive and store a recovered liquid that is drawn from a surface being cleaned through the suction inlet by the suction source, the recovery tank includinga first end,Attorney Docket No. 025818-0165-W001a second end opposite the first end,an inlet channel fluidly connected to the suction inlet, the inlet channel configured to receive the recovered liquid and air from the suction inlet,an outlet channel fluidly connected to the inlet channel and the suction source, the outlet channel configured to direct the air from the recovery tank to the suction source, the outlet channel having an outlet opening that allows air to enter the outlet channel, and a shutoff float configured to float on a surface of the recovered liquid within the recovery tank and inhibit air from flowing into the outlet channel of the recovery tank when a surface of the recovered liquid within the recovery tank reaches a desired level, wherein the shutoff float has a float body and a shutoff area connected to the float body by a hinge,wherein the shutoff area is configured to cover the outlet opening to inhibit air from flowing into the outlet channel,wherein the hinge is configured to flex to cause the shutoff float to cover the outlet opening when a predetermined force is applied to the hinge, and wherein the hinge is configured to resist flexing when a force less than the predetermined force is applied to the hinge.

34. The surface cleaner of claim 33, wherein the predetermined force is determined by one or more elements from a group consisting of: hinge thickness, hinge height, hinge length, hinge shape, and hinge material.

35. The surface cleaner according to claim 33 or claim34, wherein the predetermined force corresponds to a predetermined amount of the shutoff area being exposed to the outlet opening and suction from the suction source being applied through the outlet opening as the float rises with the surface of the recovered liquid within the recovery tank.

36. The surface cleaner of claim 35, wherein the outlet opening is defined by a cross-sectional area, and wherein the predetermined amount of the shutoff area being exposed to the outlet opening is more than 75% of the area of the outlet opening.Attorney Docket No. 025818-0165-W00137. The surface cleaner of claim 35, wherein the outlet opening is defined by a cross-sectional area, and wherein the predetermined amount of the shutoff area being exposed to the outlet opening is between 80% and 100% of the area of the outlet opening.

38. The surface cleaner according to any one of claims 33-37, wherein the outlet opening is defined by a cross-sectional area, and wherein the shutoff area has a total area that is equal to or greater than the area of the outlet opening.

39. The surface cleaner according to any one of claims 33-38, wherein the outlet opening is spaced from the first end and the second end.

40. The surface cleaner according to any one of claims 33-39, wherein the inlet channel includes a recovery tank inlet positioned at the first end of the recovery tank.

41. The surface cleaner according to any of the claims 33-40, wherein the recovery tank further includes:a plenum fluidly connected to the inlet channel, the plenum adjacent the second end of the recovery tank, the plenum configured to receive the recovered liquid and air from the inlet channel,one or more openings positioned along an outer wall of the plenum, anda cyclone chamber fluidly connected to the plenum, the cyclone chamber configured to receive the recovered liquid and air from the plenum through the one or more passages.

42. The surface cleaner of claim 41, wherein the outer wall of the plenum is a curved wall offset from the sidewall, further comprising a plurality of adjacent vanes and a plurality of passages, the cyclone chamber configured to receive the recovered liquid and air from the plenum through the plurality of passages.

43. The surface cleaner according to any of the claims 33-42, wherein the recovery tank further includes one or more paddles positioned within the recovery tank, wherein the one or more paddles are configured to engage the recovered liquid in the recovery tank when a surface of the recovered liquid within the recovery tank reaches a predetermined level.

Images