Coating system comprising an electric sprayer

Abstract

The paint sprayer may include a housing that encloses an interior space. The paint sprayer may include a nozzle assembly coupled to the housing. The paint sprayer may include a pump assembly fluidly coupled to the nozzle assembly and positioned within the first region of the interior space. The paint sprayer may include a reservoir fluidly coupled to the pump assembly and configured to contain a spraying liquid, the reservoir positioned within a second region of the interior space.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Patent Application No. 63 / 590,908, filed on October 17, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to painting systems and, more particularly, to portable electric paint sprayers. Background Art

[0004] Portable electric paint sprayers (sometimes called airless paint sprayers) can finely atomize liquid paint without using a compressed air source. Airless paint sprayers pressurize liquid paint or other spraying liquid (e.g., stain, varnish, etc.) and discharge the paint through a small shaped orifice. Summary of the invention

[0005] In one aspect, the present disclosure provides a paint sprayer comprising: a housing enclosing an interior space; a nozzle assembly coupled to the housing; a pump assembly fluidly coupled to the nozzle assembly and positioned within a first region of the interior space; and a reservoir fluidly coupled to the pump assembly and configured to contain a liquid for spraying, the reservoir being positioned within a second region of the interior space.

[0006] In another aspect, the present disclosure provides a paint sprayer comprising: a housing; a nozzle assembly coupled to the housing; a pump assembly positioned within the housing and fluidly coupled to the nozzle assembly; and a collapsible reservoir fluidly coupled to the pump assembly and configured to contain a liquid for spraying, the collapsible reservoir comprising a flexible sidewall and defining a variable internal volume.

[0007] In another aspect, the present disclosure provides a paint sprayer comprising: a housing; a nozzle assembly coupled to the housing; a pump assembly positioned within the housing and fluidly coupled to the nozzle assembly; and a collapsible reservoir fluidly coupled to the pump assembly and configured to contain a liquid for spraying, the collapsible reservoir comprising a flexible bag and a rigid connector attached to the flexible bag.

[0008] On the other hand, the present disclosure provides a paint sprayer comprising: a housing; a nozzle assembly connected to the housing; a pump assembly positioned within the housing and fluidly connected to the nozzle assembly; a reservoir fluidly connected to the pump assembly and configured to contain a spray liquid; and a delivery connector fluidly connected to the pump assembly and configured to selectively connect to an external source of the spray liquid; wherein the pump assembly is operable in a first mode to draw the spray liquid from the external source via the delivery connector and fill the reservoir.

[0009] On the other hand, the present disclosure provides a paint sprayer comprising: a housing; a pump assembly positioned within the housing; and a nozzle assembly fluidly coupled to the pump assembly, the nozzle assembly comprising a spray tip defining an outlet orifice, a valve assembly positioned upstream of the outlet orifice and downstream of the pump assembly and biased toward a closed position, and an override actuator coupled to the valve assembly; wherein the valve assembly is configured to open in response to a fluid pressure generated by the pump assembly exceeding a threshold pressure; and wherein the override actuator is operable to open the valve assembly regardless of the fluid pressure.

[0010] On the other hand, the present disclosure provides a paint spraying system, which includes: a paint sprayer, which is configured to spray a spraying liquid, the paint sprayer including a pump assembly, a spray tip, and a sprayer delivery connector fluidly connected to the pump assembly; a delivery hose, the delivery hose including a hose segment and a hose delivery connector, the hose segment having a first end connected to the hose delivery connector and a second end configured to be in fluid communication with a source of the spraying liquid, the hose delivery connector being configured to selectively and removably connect to the sprayer delivery connector to establish a fluid connection between the pump assembly and the hose segment; and a base, the base including a base wall and a first support portion, the first support portion being connected to the base wall and defining a first receiving seat, the first receiving seat being configured to removably receive the paint sprayer.

[0011] On the other hand, the present disclosure provides a method for priming a paint sprayer of a paint spraying system, the paint spraying system comprising a delivery hose and a container containing a spraying liquid, the delivery hose having a main hose section, a hose delivery connector, and a priming mechanism, the priming mechanism having a priming chamber, the method comprising: connecting the hose delivery connector to the paint sprayer; drawing the spraying liquid from the container into the priming chamber of the priming mechanism; and forcing the spraying liquid to leave the priming chamber and enter the paint sprayer.

[0012] Other aspects of the disclosure will become apparent by consideration of the detailed description and accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a perspective view showing a painting system according to an embodiment of the present disclosure.

[0014] Figure 2 It is shown Figure 1 Another perspective view of the coating system.

[0015] Figure 3 It is shown Figure 1 A perspective view of a portion of a delivery hose of a painting system.

[0016] Figure 4 It is shown Figure 1 A perspective view of a paint sprayer of a painting system.

[0017] Figure 5 yes Figure 4 The paint sprayer along Figure 4 A cross-sectional view taken along line 5-5.

[0018] Figure 6 It is shown Figure 4 A perspective view of a reservoir of a paint sprayer.

[0019] Figure 7 It is shown Figure 4 Schematic diagram of the control system of a paint sprayer.

[0020] Figure 8 It is used to show Figure 7 Schematic diagram of the control logic of the electronic controller of the control system.

[0021] Fig. 9 It is shown Figure 4 A perspective view of a nozzle assembly of a paint sprayer.

[0022] Fig.10 It is shown Fig. 9 The nozzle assembly along Fig. 9 A cross-sectional view taken along line 10-10.

[0023] Fig.11 It is shown Fig. 9 The nozzle assembly is located along Fig. 9 A cross-sectional view taken along line 11-11.

[0024] Fig.12 It is shown Fig. 9 The nozzle assembly is located along Fig. 9 A cross-sectional view taken along line 10-10.

[0025] Fig.13 It is shown Figure 1A partially exploded perspective view of the coating system.

[0026] Fig.14 It is shown Figure 1 A perspective view of the base of the coating system.

[0027] Fig.15 and Fig.16 is a perspective view showing a painting system according to another embodiment of the present disclosure.

[0028] Fig.17 It is shown Fig.15 A perspective view of a paint sprayer of a painting system.

[0029] Fig.18 It is shown Fig.17 A partially exploded perspective view of a paint sprayer.

[0030] Fig.19 yes Fig.17 The paint sprayer along Fig.17 A cross-sectional view taken along line 19-19.

[0031] Fig. 20 yes Fig.17 A partially exploded perspective view of a reservoir assembly of a paint sprayer.

[0032] Fig.21 It shows Fig.17 The parts of the paint sprayer are along Fig.17 Detailed cross-sectional view taken along line 19-19.

[0033] Fig. 22 It shows Fig.17 The parts of the paint sprayer are along Fig.17 Detailed cross-sectional view taken along line 22-22.

[0034] Fig.23A is shown connected to Fig.17 Paint sprayer, Fig.15 A partial perspective view of a hose delivery connector for a coating system.

[0035] Fig. 23B It shows Fig.23A A partial perspective view of a hose delivery connector.

[0036] Fig.23C It shows Fig.17 A partial perspective view of a sprayer delivery connector of a paint sprayer.

[0037] Fig.24 is shown with Fig.17 The paint sprayer is disconnected, Fig.23A The hose delivery connector along Fig.17 A cross-sectional view taken along line 19-19.

[0038] Fig.25 is shown connected to Fig.17 Paint sprayer, Fig.23A The hose delivery connector along Fig.17 A cross-sectional view taken along line 19-19.

[0039] Fig.26 yes Fig.17 A partial plan view of a paint sprayer with some parts removed.

[0040] Fig. 27 It shows Fig.17 The parts of the paint sprayer are along Fig.17 Detailed cross-sectional view taken along line 19-19.

[0041] Fig.28 It shows Fig.17 The parts of the paint sprayer are along Fig.17 Detailed cross-sectional view taken along line 19-19.

[0042] Fig.29 is shown connected to Fig.17 Paint sprayer, Fig.23A A partial perspective view of a hose delivery connector with some parts removed.

[0043] Fig.30 It shows Fig.17 The parts of the paint sprayer are along Fig.17 Detailed cross-sectional view taken along line 30-30.

[0044] Fig.31 It shows Fig.17 A partial perspective view of a portion of a paint sprayer.

[0045] Fig.32 yes Fig.15 A partially exploded perspective view of the coating system.

[0046] Fig.33 yes Fig.15 A perspective view of a delivery hose for a coating system.

[0047] Fig.34 yes Fig.33 The pre-filling mechanism of the delivery hose is along Fig.33 A cross-sectional view taken along line 34-34.

[0048] Fig.35 It is set in the paint tank Fig.34 A cross-sectional view of the end of a delivery hose.

[0049] Fig.36 It shows that Fig.34 The pre-charge mechanism Fig.15 Flow chart of a method for pre-charging a paint sprayer.

[0050] Fig.37 and Fig.38 yes Fig.15 A perspective view of the coating system showing Fig.26 The hose delivery coupling is connected to Fig.17 Paint sprayer.

[0051] Fig.39 and Fig.40 yes Fig.15 A perspective view of the base of the coating system.

[0052] Before explaining any embodiments of the present disclosure in detail, it should be understood that the present disclosure is not limited in its application to the construction details and component arrangements set forth in the following description or shown in the following figures. The present disclosure can have other embodiments and can be practiced or performed in various ways. In addition, it should be understood that the words and terms used herein are for descriptive purposes and should not be considered restrictive.

[0053] Features illustrated or described as part of one embodiment may be used with another embodiment to yield yet another embodiment. It is therefore contemplated that the present disclosure covers such modifications and variations as fall within the scope of the appended claims and their equivalents. Numerals and letter designations are used in the detailed description to refer to features in the drawings. The same or similar designations in the drawings and description have been used to refer to the same or similar parts of the present disclosure.

[0054] As used herein, the terms "first", "second" and "third" can be used interchangeably to distinguish one component from another component, without intending to specify the position or importance of each component. Unless the context clearly indicates otherwise, the singular forms of "a", "one" and "the" include plural referents. Unless otherwise specified herein, the terms "connect", "fix", "attach to" and the like refer to both direct connection, fixing or attachment, and also refer to indirect connection, fixing or attachment through one or more intermediate components or features. As used herein, the terms "include", "comprise", "contain", "have" or any other variation thereof are intended to cover non-exclusive inclusion. For example, the process, method, article or equipment including a list of features need not be limited to those features, but may include other features that are not explicitly listed or inherent to these processes, methods, articles or equipment. Further, unless there is a clear statement to the contrary, "or" refers to an inclusive "or" rather than an exclusive "or". For example, any of the following situations satisfies condition A or B: A is true (or exists) and B is false (or does not exist), A is false (or does not exist) and B is true (or exists), and both A and B are true (or exist).

[0055] Approximate terms such as "substantially," "approximately," or "substantially" include values ​​within ten percent greater or less than the stated value. When used in the context of an angle or direction, such terms include values ​​within ten degrees greater or less than the stated angle or direction. For example, "substantially vertical" includes directions within ten degrees of vertical in any direction (e.g., clockwise or counterclockwise).

[0056] Benefits, other advantages, and solutions to problems are described below with respect to specific embodiments. However, benefits, advantages, solutions to problems, and any one or more features that may make any benefit, advantage, or solution appear or become more apparent should not be construed as key, required, or essential features of any or all claims. DETAILED DESCRIPTION

[0057] I. First embodiment

[0058] Figure 1 and Figure 2 A painting system 10 is shown that includes a paint sprayer 14, a base assembly 18, a delivery hose 22, and a container 26. The base assembly 18 includes a base 30 having a plurality of receptacles 34 for removably receiving and storing the paint sprayer 14, the delivery hose 22, the container 26, and a paint tank 38. The delivery hose 22 is selectively fluidly coupled to the paint sprayer 14 to facilitate loading or unloading of the paint sprayer 14 with a spraying liquid (e.g., paint, colorant, or cleaning solution such as water, solvent, etc.).

[0059] Paint sprayer

[0060] refer to Figure 4 and Figure 5 In the illustrated embodiment, the paint sprayer 14 is a portable electric paint sprayer 14 that includes a housing 42 and an electric motor 46. The paint sprayer 14 can be operated with a battery pack 50 that is removably coupled to a battery receiving base 54 located at the bottom end of the housing 42. The battery pack 50 includes a plurality of battery cells (not shown) that are electrically connected to provide a desired output (e.g., nominal voltage, current capacity, etc.) of the battery pack 50. When the battery pack 50 is coupled to the battery receiving base 54, the electric motor 46 receives power from the battery pack 50.

[0061] In some embodiments (not shown), the paint sprayer 14 may include a power cord for electrically connecting the motor 46 to an AC power source. However, a battery pack 50 is a preferred means for powering the paint sprayer 14 because the wireless paint sprayer may be used in locations where other power sources are not available. In this embodiment, the motor 46 includes a stator assembly (not shown) and a rotor assembly (not shown) that is rotatable about an axis relative to the stator assembly. In some embodiments, the motor 46 may be a brushless direct current ("BLDC") motor in which the stator assembly is electronically commutated.

[0062] Continue to refer Figure 4 and Figure 5 , the paint sprayer 14 also includes a nozzle assembly 58 coupled to the housing 42. The housing 42 includes a handle portion 62 coupled to the battery receptacle 54 and a main portion 66 coupled to the nozzle assembly 58. The handle portion 62 supports a trigger assembly 70 that is electrically connected to the motor 46 and is operable to selectively activate the motor 46. In the illustrated embodiment, the housing 42 can include a pair of clamshell halves 74 that are coupled together along a central separation plane and form both the handle portion 62 and the main portion 66.

[0063] The main part 66 of the housing 42 encloses a first internal space 78, in which the motor 46 is supported. The paint sprayer 14 also includes a pump 82, which is operably connected to the motor 46 and positioned in the first internal space 78 of the main part 66. The pump 82 is fluidically connected to the nozzle assembly 58 and mechanically connected to the motor 46. The paint sprayer 14 further includes a reservoir 86, which is positioned in the housing 42 and fluidically connected to the pump 82. The reservoir 86 can receive, store and supply liquid for spraying. In particular, the reservoir 86 can receive liquid for spraying, store liquid for spraying and also supply liquid for spraying to the pump 82.

[0064] In the illustrated embodiment, the pump 82 includes a first fluid connector 90 and a second fluid connector 94. The pump 82 can be operated in both forward mode and reverse mode. In the forward mode, the pump 82 sucks the spray liquid through the first fluid connector 90 and discharges the spray liquid through the second fluid connector 94. Conversely, in the reverse mode, the pump 82 sucks the spray liquid through the second fluid connector 94 and discharges the spray liquid through the first fluid connector 90. By operating the motor 46 in the first or forward rotation direction, the pump 82 can be operated in the forward mode, and by operating the motor 46 in the opposite second or reverse rotation direction, the pump can be operated in the reverse mode. In the illustrated embodiment, the pump 82 is a gear pump. In other embodiments, the pump 82 can alternatively be another type of pump, such as a piston pump, a diaphragm pump, a peristaltic pump, etc.

[0065] refer to Figure 5 and Figure 6 In the illustrated embodiment, the reservoir 86 is a collapsible reservoir having a collapsible portion 98 that is capable of expanding or contracting in response to the reservoir 86 being loaded or unloaded with a spraying liquid. The reservoir 86 defines a variable interior volume 102 and expands and contracts between a full state and an empty state. When the collapsible portion 98 expands, the variable interior volume 102 increases, and when the collapsible portion 98 contracts, the variable interior volume 102 decreases. In some embodiments, the variable interior volume 102 of the reservoir in the empty state is ninety percent or less of the variable interior volume 102 in the filled state. Figure 6 As shown, the collapsible portion 98 may be formed as a flexible bag 98 having a side wall 106 with a plurality of folded segments 110. When the collapsible portion 98 expands, the folded segments 110 expand away from each other, and when the collapsible portion 98 contracts, the folded segments 110 fold toward each other. In other embodiments (not shown), the collapsible portion 98 may instead be simply formed with a flexible side wall 106 that collapses toward itself when the reservoir 86 is emptied and expands away from itself when the reservoir 86 is filled.

[0066] The reservoir 86 may also include a rigid coupler 114 coupled to the collapsible portion 98. In some embodiments, the rigid coupler 114 may be fixedly attached to the collapsible portion 98. In other embodiments, the rigid coupler 114 may be removably coupled to the collapsible portion 98, which may allow the collapsible portion 98 to be replaced with another collapsible portion as desired. The rigid coupler 114 includes a coupler fitting 118. In the illustrated embodiment, the coupler fitting 118 may be a "Zerk" fitting. The paint sprayer 14 includes a corresponding coupler receptacle 122 supported within the housing 42. The coupler receptacle 122 is fluidly connected to the first fluid connector 90 of the pump 82 via a first passage 126. In the illustrated embodiment, the coupler receptacle 122 is removably fluidly coupled to the coupler fitting 118, thereby fluidly connecting the reservoir 86 to the pump 82.

[0067] Continue to refer Figure 5 , the reservoir 86 of the paint sprayer 14 is completely enclosed within the housing 42. In the illustrated embodiment, the housing 42 further defines and encloses a second interior space 130, which is separated from the first interior space by a partition wall 134. The reservoir 86 is located in the second interior space 130. The partition wall 134 separates the reservoir 86 from the first interior space 78 so that leaking or overflowing spray liquid ejected from the reservoir 86 can be contained in the second interior space 130 and will not interfere with the motor 46, the pump 82, or other components located in the first interior space 78. The partition wall 134 can be formed as a part of the clamshell half 74 or can be formed as a separate component. The coupler receptacle 122 at least partially protrudes through the partition wall 134 and into the second interior space 130, which allows the coupler receptacle to access the reservoir 86 and be connected to the coupler fitting 118.

[0068] In the illustrated embodiment, the housing 42 further includes a reservoir housing member 138 coupled to the main portion 66. In the illustrated embodiment, the reservoir housing member 138 is formed as a door or lid 138. The lid 138 can be removably coupled to the main portion 66 and selectively removable to expose access to the second interior space 130 and allow insertion, removal or replacement of the reservoir 86. In the illustrated embodiment, the lid 138 is pivotally coupled to the main portion 66 by a hinge 142 and can pivot between an open position and a closed position around a hinge axis 146. In the closed position, the lid 138 can be fastened to the main portion 66 by a latch (e.g., an eccentric buckle), a clamp, a snap, a threaded fastener, a twist lock, a bayonet lock or other device. In some embodiments, the user can disconnect the latch, clamp, snap, threaded fastener or other device without using a tool. When the lid 138 is in the closed position, the second interior space 130 is completely closed or defined between the lid 138 and the main portion 66. More particularly, the second interior space 130 is enclosed by the cover 138, the main portion 66, and the dividing wall 134. In this way, the reservoir 86 is enclosed within the housing 42 or within the second interior space 130 of the housing 42. In other embodiments (not shown), the reservoir housing member may instead be formed as a rotating cover that is secured to the main housing portion by rotation (e.g., by a twist lock or bayonet lock). In some embodiments, the cover 138 may be fully detachably attached via a fastener (or fastener head) engaged in a keyhole slot.

[0069] Continue to refer Figure 5 , when the paint sprayer 14 is oriented as Figure 5 In the depicted upright orientation or spraying orientation, the second interior space 130 is generally located above the handle portion 62. In this orientation of the paint sprayer 14, the reservoir 86 is also located above the handle portion 62. The position of the reservoir 86 above the handle portion 62 balances the weight of the reservoir 86 (including the spraying liquid contained therein) above the handle portion 62. This minimizes the moment created by the weight of the reservoir 86 about the handle portion 62, making it easier to hold and operate the paint sprayer 14. Figure 5 As shown, the handle portion 62 defines a longitudinal handle axis 150 that intersects the second interior space 130 and intersects the reservoir 86 .

[0070] refer to Figure 5 and Figure 7 , the paint sprayer 14 may also include a screen or filter 154. The filter 154 may be removable and / or replaceable. For example, in some embodiments, the filter 154 may be positioned adjacent to or supported by the coupler receptacle 122. When the lid 138 is opened and the reservoir 86 is removed, the filter 154 may be accessed and removed / replaced via the second interior space 130.

[0071] Continue to refer Figure 5 , the paint sprayer 14 further includes a second passage 158 that extends between the second fluid connector 94 of the pump 82 and the nozzle assembly 58 and fluidly connects the second fluid connector to the nozzle assembly. In this way, the reservoir 86 is fluidly connected to the nozzle assembly 58 via the first passage 126, the pump 82, and the second passage 158. The third passage 162 or delivery passage is fluidly connected to the second passage 158 and extends to the sprayer delivery connector 166 of the paint sprayer 14. The sprayer delivery connector 166 can be selectively and removably coupled to the delivery hose 22 ( Figure 1 ), the delivery hose can fluidly connect the sprayer delivery connector 166 to an external source of spray liquid (such as the paint tank 38). As will be further described herein, the pump 82 can be operated in the reverse mode to draw the spray liquid from the paint tank 38 into the reservoir 86. Specifically, the spray liquid moves from the paint tank 38 to the reservoir 86 via the delivery hose 22, the sprayer delivery connector 166, the third passage 162, the second passage 158, the pump 82, via the second fluid connector 94 to the first fluid connector 90, the first passage 126, and the coupler receptacle 122. Alternatively, the pump 82 can be operated in the forward mode to empty the reservoir 86 and discharge the spray liquid from the paint sprayer 14 along a similar path via the sprayer delivery connector 166. The spray liquid exiting via the sprayer delivery connector 166 can move through the delivery hose 22 and flow back into the paint tank 38 or back to another external container.

[0072] refer to Figure 2 and Figure 3 , the delivery hose 22 includes a hose segment 170 and a hose delivery coupler 174 coupled to the hose segment 170. The hose delivery coupler 174 includes a hose delivery connector 178, a port 182 fluidly connected to the hose delivery connector 178 and the hose segment 170, and a handle 186. The hose delivery coupler 174 may also include an annular flange 190 at the base of the handle 186 and between the handle 186 and the hose delivery connector 178. The flange 190 may prevent the spray liquid flowing from the hose delivery connector 178 to the handle 186 from dripping.

[0073] Each of the sprayer delivery connector 166 and the hose delivery connector 178 can include a valve (not shown) that is usually biased toward the closed position. In this way, when the sprayer delivery connector 166 is not connected to the hose delivery connector 178 and the pump 82 is operated, the spraying liquid moving through the second passage 158 will not pass through the sprayer delivery connector 166. When the hose delivery connector 178 is connected to the sprayer delivery connector 166, the valve of each connector 166, 178 is actuated so that the spraying liquid can pass through each of the connectors 166, 178. In other words, the valves of the connectors 166, 178 are paired valves on each side of the connecting portion. When the two connectors 166, 178 are not connected, the valve is biased to the closed position. When the two connectors 166, 178 (e.g., via bayonet connection, threaded connection, etc.) are connected, the biasing force is overcome and the valve is opened to allow the fluid delivery between the connectors 166, 178. Examples of sprayer and hose delivery connectors 166, 178 may include, for example, non-spill hydraulic connectors, such as fluid connectors used in hydraulic circuit applications that are subject to high pressure pulses. Examples of such connectors include, for example, the VEP series couplers from Stucchi of Romeoville, Illinois, the Everis series couplers from CPC Worldwide of Arden Hills, Minnesota, and the Everis series couplers from CPC Worldwide of Arden Hills, Minnesota. TM series connectors, and the NSL series quick-connects from Parker Hannifin Corp. of Cleveland, Ohio.

[0074] like Fig.13 As shown, the hose section 170 of the delivery hose 22 includes a distal end 194, which is away from the hose delivery coupling 174 and is configured to be positioned in a container (such as a paint tank 38 or a container 26). The distal end 194 may include a weighted member 198 that maintains the distal end 194 immersed in the paint tank 38 or in the container 26. The weighted member 198 may be annular in shape and may be formed of a material having a density greater than the density of the spraying liquid, so that the weighted member 198 will tend to sink toward the bottom of the container and remain immersed in the spraying liquid. The distal end 194 may also include a tightly fitting wiper collar (not shown). The collar may have a handle (not shown) and may generally be retained at a position spaced apart from the end of the distal end 194. When the distal end 194 is located in the container, the spacing of the collar from the end of the distal end 194 helps prevent the handle from contacting the spraying liquid. The collar can be slidably moved toward the tip of the distal end 194 to push or wipe excess spray liquid toward the tip and back into the container. The distal end 194 can also have a restriction feature (not shown) such as a clamp to prevent the collar from separating from the delivery hose 22.

[0075] refer to Figure 2 , Figure 3 , Figure 7 and Fig.13 The delivery hose 22 may also include a screen or filter 202. The filter 202 may be removable and / or replaceable. For example, in some embodiments, the filter 202 may be positioned within the hose delivery coupling 174, or may be positioned within the distal end 194 of the hose segment 170.

[0076] refer to Figure 5 and Figure 7 , the paint sprayer 14 also includes a control system 206 for controlling various operations of the paint sprayer 14. The control system 206 includes an electronic controller 210 supported in the main portion 66 of the housing 42. The controller 210 controls the operation of the paint sprayer 14 according to three operating modes, which include a loading mode, an unloading mode, and a spraying mode. When the hose delivery connector 178 is connected to the sprayer delivery connector 166, the paint sprayer 14 can operate in the loading mode and the unloading mode. When the hose delivery connector 178 is disconnected from the sprayer delivery connector 166, the paint sprayer 14 can operate in the spraying mode.

[0077] In the loading mode and the unloading mode, the hose delivery connector 178 is connected to the sprayer delivery connector 166, and the valves (not shown) of the connectors 166, 178 are open. When the paint sprayer 14 is operated in the loading mode, the motor 46 is operated in the reverse rotation direction, and the pump 82 is operated in the reverse mode to suck the spray liquid through the sprayer delivery connector 166 (i.e., via the delivery hose 22 inserted into the external container) and introduce the spray liquid into the reservoir 86 to fill the reservoir 86. When the paint sprayer is operated in the unloading mode, the motor 46 is operated in the forward rotation direction, and the pump 82 is operated in the forward mode to draw the spray liquid from the reservoir 86 and discharge the spray liquid through the sprayer delivery connector 166 (i.e., and into the external container via the delivery hose 22). In the spraying mode, the sprayer delivery connector 166 is disconnected from the hose delivery connector 178, and the valve (not shown) in the sprayer delivery connector 166 is closed. When operating the paint sprayer 14 in the spray mode, the motor is operated in a forward rotational direction and the pump is operated in the forward mode to draw the spray liquid from the reservoir 86 and direct the spray liquid through the nozzle assembly 58 to perform a paint spraying operation or a cleaning operation.

[0078] When the paint sprayer 14 is operated in the loading mode or the unloading mode, the spray liquid moves along the first fluid path 214 extending between the sprayer delivery connector 166 and the reservoir 86. Specifically, the first fluid path 214 includes the sprayer delivery connector 166, the third passage 162, the second passage 158, the pump 82, the first passage 126, the coupler receptacle 122, and the reservoir 86. When the paint sprayer 14 is operated in the spray mode, the spray liquid moves along the second fluid path 218 extending between the reservoir 86 and the nozzle assembly 58. Specifically, the second fluid path 218 includes the reservoir 86, the coupler receptacle 122, the first passage 126, the pump 82, the second passage 158, and the nozzle assembly 58.

[0079] The control system 206 also includes a full reservoir sensor 222 and an empty reservoir sensor 226, each of which is electrically connected to the controller 210 and is operable to detect when the reservoir 86 is full of spraying liquid or when it is empty. The full reservoir sensor 222 can be provided as, for example, a mechanical sensor, a pressure sensor, a Hall sensor, etc. For example, in some embodiments, the full reservoir sensor 222 can be a mechanical switch. When the reservoir 86 is full, the collapsible portion 98 is in a fully expanded state, and the distal end 230 of the collapsible portion 98 contacts the mechanical switch. The distal end 230 engages and actuates an actuator (e.g., a contact arm, a button, etc.) of the mechanical switch. In response to being actuated, the full reservoir sensor 222 communicates a signal indicating that the reservoir 86 is full to the controller 210. When the reservoir 86 is emptied and contracted, the collapsible portion 98 moves out of contact with the mechanical switch, and the controller 210 stops receiving signals. In another embodiment, the full reservoir sensor can be a Hall sensor. In this embodiment, the reservoir 86 may include one or more permanent magnets 234 that change position relative to the Hall sensor as the reservoir 86 expands or contracts during operation of the paint sprayer 14. In response to the reservoir 86 being full, the permanent magnet 234 moves within a range close enough to the Hall sensor so that the Hall sensor detects that the reservoir 86 is full. In response to receiving a signal indicating that the reservoir 86 is full, the controller 210 can disable the operation of the motor 46 to prevent the reservoir 86 from being overfilled and ruptured. In some embodiments, the signal from the full reservoir sensor 222 can be sent to the controller 210 only when the paint sprayer 14 is in loading mode. In some embodiments, in response to receiving a signal indicating that the reservoir 86 is full, the controller 210 can actuate an indicator (such as an LED) to notify the user that the reservoir is full. The controller 210 can turn off such an indication when it no longer receives a signal.

[0080] The empty reservoir sensor 226 may be provided as, for example, a vacuum sensor, a Hall sensor, a pressure sensor, a mechanical sensor, etc. For example, in one embodiment, the empty reservoir sensor 226 is a Hall sensor, and the reservoir 86 includes one or more permanent magnets 234. In response to the reservoir 86 being empty, the permanent magnet 234 moves within a sufficiently close range to the Hall sensor such that the Hall sensor detects that the reservoir 86 is empty (i.e., due to the permanent magnet 234 moving toward the Hall sensor when the collapsible portion 98 of the reservoir 86 contracts). In the illustrated embodiment, the empty reservoir sensor 226 is provided as a vacuum sensor 226 that is positioned in fluid communication with the first passage 126. When the pump 82 is operated in the forward mode and the reservoir 86 reaches an empty state, a vacuum is formed within the first passage 126. The vacuum sensor 226 detects the vacuum created within the first passage 126 and, in response, communicates a signal indicating that the reservoir is empty to the controller 210. In response to receiving a signal indicating that the reservoir 86 is empty, the controller 210 can disable the operation of the motor 46 to prevent the pump 82 from running dry. In some embodiments, the signal from the empty reservoir sensor 226 can be sent to the controller 210 only when the paint sprayer 14 is in the unloading mode or the spraying mode. In some embodiments, in response to receiving a signal indicating that the reservoir 86 is empty, the controller 210 can actuate an indicator (such as an LED) to notify the user that the reservoir is empty. The controller 210 can turn off such an indication when it no longer receives a signal.

[0081] refer to Figure 4 , Figure 5 and Figure 7 , the paint sprayer 14 further includes a mode selection switch 238 incorporated into the control system 206. The mode selection switch 238 is electrically connected to the controller 210 and is operable to switch the operating mode of the paint sprayer 14. In some embodiments, the mode selection switch 238 is operable to select between a loading mode, an unloading mode, and a spraying mode. In these embodiments, the mode selection switch 238 communicates a mode signal indicating the operating mode to the controller 210, and in response, the controller 210 places the paint sprayer 14 in the selected mode by enabling or disabling different functions. For example, in the loading mode, the controller 210 enables the motor 46 to operate only in the reverse rotation direction corresponding to the reverse mode of the pump 82. In the unloading mode and the spraying mode, the controller 210 enables the motor 46 to operate only in the forward rotation direction, which corresponds to the forward mode of the pump 82. The controller 210 can further adjust the speed of the motor 46 in response to the selected mode.

[0082] Continue to refer Figure 5 and Figure 7, the control system 206 also includes a delivery connection sensor 242 that detects when the hose delivery connector 178 is connected to the sprayer delivery connector 166. Because the valve of the sprayer delivery connector 166 is opened when the hose delivery connector 178 is connected, the delivery connection sensor 242 can further detect when the valve of the sprayer delivery connector 166 is opened. The delivery connection sensor 242 can be formed as, for example, a mechanical sensor, a Hall sensor, etc. The delivery connection sensor 242 is electrically connected to the controller 210. In response to detecting that the hose delivery connector 178 is connected to the sprayer delivery connector 166, the delivery connection sensor 242 communicates a signal indicating the connection to the controller 210. In response to the signal, the controller 210 can disable the spray mode and can limit the speed of the motor 46, as will be further discussed herein.

[0083] In some embodiments, the mode selection switch 238 can be only operable to select between the loading mode and the unloading mode. In such an embodiment, when the sprayer delivery connector 166 is not connected to the hose delivery connector 178, the controller 210 can automatically place the paint sprayer 14 in the spraying mode. Specifically, the controller can be in response to the determination based on the signal from the delivery connection sensor 242 that the sprayer delivery connector 166 is not connected to the hose delivery connector 178 and the paint sprayer 14 is placed in the spraying mode. In an alternative embodiment (not shown), a mechanical "lock" can be used, which prevents the paint sprayer 14 from being placed in the spraying mode when the delivery connectors 166, 178 are connected to each other. The mechanical lock can be automatically actuated when the delivery connectors 166, 178 are connected, and the movement of the mode selection switch 238 can be blocked to prevent the mode selection switch 238 from moving to the spraying mode position. An instruction can be issued on the paint sprayer 14 to notify the user that the hose delivery connector 178 needs to be removed before the mode selection switch 238 is moved to the spraying mode position.

[0084] In some embodiments (not shown), the control system 206 of the paint sprayer 14 may further include a thermal sensor operable to detect when the motor 46 and / or other components of the paint sprayer 14 exceed a predetermined temperature limit. The thermal sensor may communicate a thermal signal indicative of the temperature of the motor 46 and / or other components to the controller 210, and the controller may deactivate the motor 46 and / or provide an indication to the user upon determining that the temperature detected by the thermal sensor exceeds the predetermined limit.

[0085] The control system 206 further includes a trigger switch 246 that is operable to communicate an ON or OFF signal to the controller 210. In response to the ON signal, and if certain other conditions are met, the controller 210 can activate the motor 46. The trigger switch 246 can be incorporated into the trigger assembly 70 and can be actuated by a trigger 250 of the trigger assembly 70.

[0086] refer to Figure 4 , Figure 5 and Figure 7 , the control system 206 also includes a variable speed selector 254 (e.g., such as a potentiometer or a rotatable dial). The selector 254 can be operable to, for example, change the duty cycle of the motor 46 via, for example, pulse width modulation, so as to adjust the speed of the motor 46. By changing the speed of the motor 46, the flow rate and pressure of the spraying liquid discharged from the pump 82 can be changed. In the embodiment shown, the selector 254 can be operable only in the spraying mode to change the flow rate, pressure and / or spraying mode of the spraying liquid discharged from the nozzle assembly 58. However, in the loading mode and the unloading mode, the speed of the motor 46 can be limited and cannot be changed by adjusting the selector 254. This can be done for safety reasons, that is, in order to prevent overflow, splashing or splashing when the spraying liquid is unloaded from the reservoir 86, or in order to prevent the reservoir 86 from being damaged during the loading process.

[0087] refer to Figure 5 , Fig.13 and Fig.14 In some embodiments, the control system 206 of the paint sprayer 14 includes a tool support sensor 258 electrically connected to the controller 210. The tool support sensor 258 is operable to detect when the paint sprayer 14 is correctly positioned in the first support portion 262 of the base 30, as will be further described herein. In response to being actuated, the tool support sensor 258 conveys a signal indicating that the paint sprayer 14 is correctly positioned in the first support portion 262 to the controller 210. In response to the signal, the controller 210 disables the spray mode of the paint sprayer 14. This prevents the paint sprayer 14 from spraying the spraying liquid from the nozzle assembly 58 when it is positioned in the first support portion 262 of the base 30. The tool support sensor 258 can be provided as, for example, a mechanical sensor, a Hall sensor, etc. For example, in some embodiments, the tool support sensor 258 can be a mechanical switch. When the paint sprayer 14 is correctly positioned in the first support portion 262, the first support portion 262 depresses the actuator of the mechanical switch. In other embodiments, the tool support sensor 258 is a Hall sensor. In these embodiments, the first support portion 262 of the base 30 includes a permanent magnet that is detected by the Hall sensor when the paint sprayer 14 is properly supported in the first support portion 262 .

[0088] refer to Figure 7 In some embodiments, the paint sprayer 14 also includes a ground connection 266. The ground connection 266 can be electrically connected to conductive components of the paint sprayer 14 (e.g., the motor 46, the pump 82, and / or the nozzle assembly 58), which can accumulate static charge during operation of the paint sprayer 14. The base 30 may include a corresponding ground connection 270 ( Fig.14 ), when the paint sprayer 14 is properly positioned in the base 30, the corresponding ground connection is electrically connected to the ground connection 266. The connection between the base 30 and the ground connection 266 can facilitate the safe discharge of static charge accumulated in the paint sprayer 14. This helps prevent unintentional static discharge (e.g., arcing) during operation of the paint sprayer 14, which can be unsafe when working with flammable fluids.

[0089] Figure 8 A logic flow diagram depicting control logic by which the controller 210 may operate the paint sprayer 14 is shown. At step 510, the controller 210 determines whether the full reservoir sensor 222 indicates that the reservoir 86 is full and whether the empty reservoir sensor 226 indicates that the reservoir 86 is empty. If so, the full light or empty light (or other indicator, not shown) may be activated, respectively, and then the process proceeds to step 520. If not, the process proceeds to step 520. At step 520, the controller determines whether the cover 138 ( Figure 4) is closed (e.g., based on a signal from a closed lid sensor; not shown). If yes, proceed to step 530. If no, return to step 510. At step 530, the controller 210 determines whether the trigger switch 246 is actuated. If yes, proceed to step 540. If no, return to step 510. At step 540, the controller 210 determines whether the hose delivery connector 178 is connected to the sprayer delivery connector 166 based on a signal from the delivery connection sensor 242. If yes, proceed to step 550. If no, proceed to step 560. At step 550, the controller determines whether the reservoir 86 is connected to the coupler receptacle 122 (e.g., via a signal from the coupler receptacle sensor; not shown). If yes, proceed to step 570. If no, return to step 510. At step 570, the controller 210 determines whether the mode select switch 238 has selected the loading mode or the unloading mode. If the loading mode is selected, proceed to step 580. If the unloading mode is selected, then proceed to step 590. At step 580, the controller determines whether the reservoir 86 is full based on the signal from the full reservoir sensor 222. If yes, then return to step 510. If no, then proceed to step 600. At step 600, the controller 210 operates the motor 46 in the reverse direction at the loading speed. Returning to step 590, if the controller 210 has determined at step 570 that the unloading mode is selected, then at step 590 the controller 210 determines whether the reservoir is empty based on the signal from the empty reservoir sensor 226. If yes, then return to step 510. If no, then proceed to step 610. At step 610, the controller 210 operates the motor 46 in the forward direction at the unloading speed. Returning to step 560, if the controller 210 determines at step 540 that the transfer hose 22 is not connected, then at step 560 the controller 210 determines whether the transfer door (not shown) is closed. If yes, then proceed to step 620. If no, then return to step 510. At step 620, the controller determines if the reservoir is empty based on the signal from the empty reservoir sensor 226. If yes, then return to step 510. If no, then proceed to step 630. At step 630, the controller 210 operates the motor 46 in the forward direction at a variable speed according to the variable speed selector 254.

[0090] Figures 9 to 12The nozzle assembly 58 of the paint sprayer 14 is shown. The nozzle assembly 58 includes a valve assembly 274 having a valve body 278 that defines an inlet passage 282 through which the spray liquid enters the nozzle assembly 58 from the second passage 158. The valve assembly 274 also includes a shutoff valve 286 that includes a plunger 290, a ball 294 supported at the front end of the plunger 290, and a ball seat 298 in facing relationship with the ball 294. The plunger 290 is biased toward a closed position by a spring 302, wherein the ball 294 is seated on the ball seat 298. The valve assembly 274 also includes an outlet body 306 that defines an outlet of the valve assembly 274.

[0091] During operation of the paint sprayer 14 in the spray mode, the spray liquid flows through the inlet passage 282 and into the annular space 310 defined within the outlet body 306. The spray liquid within the annular space 310 is pressurized due to the operation of the pump 82 and exerts a force on the front end of the plunger 290, causing the plunger 290 to retract to the open position against the biasing force of the spring 302 and away from the ball seat 298. The spray liquid then flows through the opening in the ball seat 298 and into the nozzle assembly 58.

[0092] refer to Fig.11 , the valve assembly 274 also includes a pressure release button 314 that can be actuated to manually retract the plunger 290 to the open position (e.g., to facilitate cleaning of the valve assembly 274 and the nozzle assembly 58). The pressure release button 314 includes a cam portion 318 that engages a follower 322 attached to the plunger 290. A spring 326 biases the pressure release button 314 toward the release position. When the pressure release button 314 is pressed into the valve body 278, the cam portion 318 exerts a force on the follower 322, which causes the follower 322 to retract with the plunger 290 to the open position of the plunger 290.

[0093] The stop valve 286 (including the plunger 290 and the spring 302) can be adjusted to actuate in response to a spraying liquid having a fluid viscosity or pressure falling within a desired range, which can include, for example, various types of coatings or colorants. When different, less viscous spraying liquids, such as water, mineral spirits, or preservatives, are used in the paint sprayer 14, the pressure release button 314 allows the user to manually open the stop valve 286 to facilitate the spraying of these less viscous spraying liquids. The pressure release button 314 also facilitates the use of the paint sprayer 14 with various spraying liquids (i.e., at a pressure lower than that normally required to open the valve assembly 274) to achieve different spraying characteristics as needed.

[0094] In some embodiments (not shown), the pressure release button 314 can be defined by a detent feature coupled to a user control member (such as a dial). The user control member can be actuatable to define how far the pressure release button 314 can be pressed, corresponding to different stages of the open position of the shut-off valve 286. Different positions of the user control member will cause the detent feature to engage the pressure release button 314 at different stages, thereby controlling the stage of the open position of the shut-off valve 286. The different positions of the pressure release button 314 can thus be adjusted for different spraying liquids (e.g., water, mineral spirits, and preservatives) to optimize the spray characteristics of each type of spraying liquid.

[0095] refer to Figures 10 to 12 , the nozzle assembly 58 includes a nozzle body 330 having internal threads that are removably tightened to external threads on the valve body 278. The nozzle assembly 58 also includes a guard 334 attached to the nozzle body 330, a removable and adjustable spray tip 338, and a saddle 342 that seals against the spray tip 338. The spray tip 338 is removably and adjustably received in a receptacle 346 defined by the guard 334 and the saddle 342. The spray tip 338 includes: a substantially cylindrical barrel 350 that removably and rotatably resides within the receptacle 346; and a handle 354 that is attached to the barrel 350 and has a shape that indicates the intended flow direction through the spray tip 338. The barrel 350 defines a hole 358 extending therethrough transversely relative to the longitudinal dimension of the barrel 350. The saddle 342 is supported in the guard 334 and seals against the outer surface of the barrel 350. The spray liquid entering from the valve assembly 274 flows through the saddle 342 and enters the upstream end of the hole 358 of the barrel 350, and then leaves the spray tip 338 from the downstream end of the hole 358.

[0096] The spray tip 338 also includes three nozzle inserts positioned within the bore 358. The nozzle assembly includes a guide nozzle insert 362, a diverging nozzle insert 366, and a converging nozzle insert 370. The spray liquid flowing into the bore 358 first flows through the guide nozzle insert 362, which directs the spray liquid in the form of a stream toward the diverging nozzle insert 366. The spray liquid entering the diverging nozzle insert 366 is turbulent in a turbulence chamber 374, which is defined between the diverging nozzle insert 366 and the converging nozzle insert 370. The turbulent spray liquid then flows through the converging nozzle insert 370, which defines a nozzle outlet 378. The spray liquid leaving the nozzle outlet 378 is atomized into a spray that can be directed toward a workpiece.

[0097] The spray tip 338 can be removed from the receiving seat 346, for example, to be cleaned or replaced with another spray tip. The spray tip 338 can also be rotated 180 degrees within the receiving seat 346 so that the three nozzle inserts are relatively Fig.10 With the spray tip 338 rotated 180 degrees, the cleaning solution can be directed 'backwards' (ie, in the direction opposite to the intended flow direction) through the apertures to facilitate cleaning of the nozzle insert.

[0098] Main Operations

[0099] Now refer to Figure 3 , Figure 5 , Figure 7 , Figure 8 , Fig.10 and Fig.13The operation of the paint sprayer 14 is described. Starting from loading the reservoir 86 with a spraying liquid (such as paint), the user first positions the reservoir 86 in the paint sprayer 14 and closes the cover 138. Then, the user couples the hose delivery connector 178 to the sprayer delivery connector 166 and positions the distal end 194 of the delivery hose 22 in a container (e.g., a paint tank 38). Then, the user actuates the mode selection switch 238 to place the paint sprayer 14 in a loading mode. Then, the user presses the trigger 250 to actuate the trigger switch 246 and activate the motor 46. This makes the pump 82 run in a reverse mode, sucking the spraying liquid from the paint tank 38 and pumping the spraying liquid into the reservoir 86. In certain embodiments, pressing the trigger 250 in the loading mode starts an automatic loading or automatic filling cycle. The automatic filling cycle will run until the full reservoir sensor 222 stops the cycle. The user can stop the automatic filling cycle at any time by actuating the trigger 250 for the second time. In this way, the user will not overfill the reservoir 86, which may cause rupture. When the user completes loading (e.g., the reservoir 86 is full, or the desired volume of spraying liquid has been loaded into the reservoir 86 in other ways), the user releases the trigger 250 and disconnects the hose delivery connector 178 from the sprayer delivery connector 166. If desired, the user can then place the hose delivery connector 178 in another container (e.g., container 26) containing a fluid (such as water or mineral spirits), which helps prevent the drying or hardening of the spraying liquid (i.e., if the spraying liquid is a coating). Then, the user adjusts the mode selection switch 238 to the spraying mode (or, in some embodiments, automatically starts the spraying mode when the hose delivery connector 178 is disconnected from the sprayer delivery connector 166). Then, the user presses the trigger 250 to actuate the trigger switch 246 and activate the motor 46. This causes the pump 82 to operate in the forward mode, sucking the spraying liquid from the reservoir 86 and pumping the spraying liquid toward the nozzle assembly 58. The spray liquid enters the inlet passage 282 where pressure builds up until it overcomes the bias of the shutoff valve 286, thereby opening the shutoff valve 286. When the shutoff valve 286 is open, the pressurized spray liquid flows from the inlet passage 282 through the shutoff valve 286 and exits through the spray tip 338 in the form of an atomized spray.

[0100] Then, whenever the reservoir 86 is emptied and needs to be refilled, or before the painting operation is completed, the above-mentioned loading step and spraying step are repeated. When the painting is completed, the user connects the hose delivery connector 178 to the sprayer delivery connector 166, and positions the distal end 194 of the delivery hose 22 in a container (e.g., a paint tank 38). If there is any spraying liquid remaining in the reservoir 86, the user can put the paint sprayer in the unloading mode by moving the mode selection switch 238 to the unloading position, and then operate the motor 46 by pulling the trigger 250. This allows the pump 82 to operate in a forward mode to discharge the spraying liquid from the reservoir 86 back into the paint tank 38 (or into different containers as needed), until the user completes the spraying (e.g., when the bag is empty, as indicated by the motor stop caused by the actuation of the empty reservoir sensor 226). Then, the user can continue to clean the paint sprayer 14, as described below.

[0101] Cleaning Operation

[0102] In order to clean the paint sprayer 14, the user places the distal end 194 of the delivery hose in a container (e.g., such as container 26) containing a cleaning fluid (e.g., water, mineral spirits, etc.). The user then connects the hose delivery connector 178 to the sprayer delivery connector 166 (if not yet connected). Then, the steps described above for the main operation of loading and spraying the spraying liquid are repeated with the cleaning fluid. In other words, the cleaning fluid is loaded into the reservoir 86 and then sprayed from the nozzle assembly 58 to clean the parts of the paint sprayer 14. The user can repeat these loading and spraying steps as needed for further cleaning. If desired, the user can also operate the paint sprayer 14 in the unloading mode as described above, so that the cleaning fluid moves through the parts more quickly, which can improve the cleaning effect. As a final step, the preservative can be pumped through the paint sprayer 14 to apply internal components (e.g., before storing the paint sprayer 14) according to the same steps described above about the main operation.

[0103] Mixed Operation

[0104] If desired, the coating liquid can be mixed in a container (such as a paint tank 38 or a container 26) by operating the paint sprayer 14. First, the user performs the steps of the main operation described above, including connecting the delivery hose 22 to the paint sprayer 14 and loading the reservoir 86 with the coating liquid. Then, the user places the paint sprayer 14 in an unloading mode and operates the paint sprayer 14 to load the coating liquid back into the container from which it was sucked. Due to the loading and unloading operations, the coating liquid re-entering the container will be mixed in the container.

[0105] Coating system

[0106] Fig.13 and Fig.14 All or part of the coating system 10 is shown in greater detail. As described herein, the coating system 10 includes a paint sprayer 14, a base 30, a delivery hose 22, and a container 26. The coating system 10 may also operate with a coating tank 38, which may be of different sizes and may contain coating material, colorant material, solvent material, anti-corrosion material, or other liquid for spraying.

[0107] The base 30 includes a base wall 382, ​​a first support portion 262, a second support portion 386, a third support portion 390, and an end well 394. Each of the first support portion 262, the second support portion 386, and the third support portion 390, and the end well 394 can be coupled to the base wall 382 or alternatively can be integrally formed with the base wall 382. The base 30 also includes a hose guide 398 coupled to the base wall 382. The hose guide 398 includes an elongated shaft portion 402 extending upward from the base wall 382 and a hook portion 406 located at a distal end of the shaft portion 402. The hook portion 406 receives and supports the hose segment 170 at an elevated position relative to the base wall 382, ​​which conveniently facilitates positioning the distal end 194 of the delivery hose 22 in a container (e.g., a paint can 38 or a container 26).

[0108] refer to Fig.14 The first support portion 262 defines a first receiving seat 408, which is Figure 1 and Figure 2 The illustrated orientation removably receives and supports the paint sprayer 14, wherein the spray tip 338 is positioned within the tip well 394 and pointing downward. More specifically, the first support portion 262 includes a plurality of raised posts 410 spaced apart from one another such that the posts 410 extend on either lateral side of the housing 42 of the paint sprayer 14 to stably support the paint sprayer 14. The first support portion 262 engages the paint sprayer 14 below the center of gravity (CG) of the paint sprayer such that the paint sprayer 14 remains stably balanced on the first support portion 262. In some embodiments (not shown), the first support portion 262 may include an additional shelf positioned to support the battery pack 50 when the battery pack 50 is coupled to the paint sprayer 14. The shelf may ensure that the paint sprayer 14 does not tip over or otherwise fall from the first support portion when batteries of different sizes and weights are coupled to the first support portion 262 and affect the CG of the paint sprayer 14.

[0109] The tip well 394 includes a raised annular (or circular) wall 414 that protrudes upward from the base wall 382 and defines a recess or well 418 therein. When the paint sprayer 14 is received in the first receiving seat 408 of the first support portion 262, the well 418 receives the spray tip 338 of the nozzle assembly 58. In some embodiments, the spray tip 338 or the guard 334 can contact the base wall 382. In other embodiments, the spray tip 338 is suspended above the base wall 382 and the paint sprayer 14 is completely supported by the first support portion 262. The tip well 394 captures drips of the spray liquid that may drip from the spray tip 338. In some embodiments, the tip well 394 may include a disposable liner (not shown). The tip well 394 (or liner) may be filled with water, mineral spirits, or other materials that help prevent the spray liquid from drying or hardening.

[0110] The first support portion 262 supports the weight of the paint sprayer 14, wherein the spray tip 338 is oriented downward and suspended in the tip well 394. This orientation ensures safety and minimizes spillage during loading or unloading of the spray liquid into the reservoir 86 (i.e., when operating the paint sprayer in loading mode or unloading mode). When the paint sprayer is supported in this manner, the user will not have to hold the paint sprayer 14 during these operations. This allows the user's hands to be free to perform other steps of the loading process and unloading process.

[0111] In the illustrated embodiment, the second support portion 386 includes a raised rectangular (or, in some cases, square or circular or oval) wall 422 that projects upward from the base wall 382 and defines a second receptacle 426 for removably receiving the container 26. In some embodiments (not shown), instead of the rectangular wall 422, the second support portion 386 may include a plurality of spaced-apart protrusions defining the second receptacle. The protrusions are intended to prevent horizontal movement of the container 26 or a liner (not shown) for receiving another liquid (such as water, mineral spirits, or a preservative).

[0112] The third support portion 390 includes an annular (or circular) recess 430, which is recessed in the base wall 382 and is defined by a cylindrical wall 434 and a bottom wall 438. The cylindrical wall 434 and the bottom wall 438 define a third receiving seat 442, which receives a paint can 38 of a first size (e.g., a pint). The third support portion 390 further includes a plurality of protrusions 446 (three in the illustrated embodiment), which are radially spaced outward from the circumference of the cylindrical wall 434 and surround the circumference of the cylindrical wall. The protrusions 446 cooperatively define a fourth receiving seat 450, which receives a larger paint can of a second size (e.g., a quart). The protrusions 446 contact the side of the paint can 38 of the second size to stably hold the paint can 38. In some embodiments (not shown), the protrusions 446 can be movable (i.e., slidable in the radial direction) to accommodate paint cans of other sizes (e.g., a gallon). The movable protrusion may be slidable, lockable, removable and / or collapsible into the base wall 382 .

[0113] The container 26 may include a lip 454 that may be grasped by a user and measurement markings on the side. The container 26 may also include a ridge (not shown) disposed vertically on the side wall of the container 26 and near its corners for attaching the hose delivery coupler 174 ( Figure 1 ) supported in an upright position.

[0114] In other embodiments (not shown), the base 30 may include one or more additional support portions for supporting additional containers, such as a second paint can 38 or a second container 26 .

[0115] As discussed herein, in some embodiments, the paint sprayer 14 includes a tool support sensor 258 that is operable to detect when the paint sprayer 14 is properly positioned in the first support portion 262 of the base 30. In other embodiments, the first support portion 262 of the base 30 may include a tool support sensor instead of the paint sprayer 14. The tool support sensor 258 of the base 30 can detect that the paint sprayer 14 is properly supported on the first support portion 262 and communicate a signal (e.g., via RFID, Bluetooth, WiFi, NFC, wired communication, or other communication means) to the controller 210. The controller 210 will disable the spray mode in response to the signal.

[0116] As discussed herein, the base 30 may further include a ground connection 270 positioned on the first support portion 262 so as to contact the ground connection 266 of the paint sprayer 14. The contact between the ground connections 266, 270 facilitates grounding the paint sprayer to reduce the possibility of arcing in the paint sprayer 14 when loading or unloading. This improves the safety of the painting system 10, especially when handling flammable fluids.

[0117] II. Second embodiment

[0118] Figures 15 to 38 A coating system 1010 is shown that is substantially similar to that described herein and that incorporates Figures 1 to 14 The following description will focus primarily on the differences or additional features of painting system 1010 compared to painting system 10. Features and elements of painting system 1010 that are similar or correspond to similar features and elements of painting system 10 will be assigned the same reference numerals plus "1000".

[0119] refer to Fig.15 and Fig.16 , the painting system 1010 includes a paint sprayer 1014, a base assembly 1018, and a delivery hose 1022. The base assembly 1018 includes a base 1030 having a plurality of receiving seats 1034 for removably receiving and storing the paint sprayer 1014, the delivery hose 1022, and a paint tank 1038. The delivery hose 1022 is selectively fluidly coupled to the paint sprayer 1014 to facilitate the paint sprayer 1014 to load or unload a spraying liquid (e.g., paint, colorant, or cleaning solution such as water, solvent, etc.).

[0120] Paint sprayer

[0121] refer to Figures 17 to 19 In the illustrated embodiment, the paint sprayer 1014 is a portable electric paint sprayer 1014 that includes a housing 1042 and an electric motor 1046. The paint sprayer 1014 can be operated with a battery pack 50 that is removably coupled to a battery receiving base 1054 located at the bottom end of the housing 1042. The motor 1046 includes a stator assembly 1047 and a rotor assembly 1048 that is rotatable about an axis relative to the stator assembly 1047. In some embodiments, the motor 1046 can be a brushless direct current ("BLDC") motor in which the stator assembly is electronically commutated.

[0122] Continue to refer Figures 17 to 19, the paint sprayer 1014 also includes a nozzle assembly 1058 coupled to the housing 1042. The housing 1042 includes a handle portion 1062 coupled to the battery receptacle 1054 and a main portion 1066 coupled to the nozzle assembly 1058. The handle portion 1062 supports a trigger assembly 1070 that is electrically connected to the motor 1046 and is operable to selectively activate the motor 1046. In the illustrated embodiment, the housing 1042 can include a pair of clamshell halves 1074 that are coupled together along a central separation plane and form both the handle portion 1062 and the main portion 1066.

[0123] The main part 1066 of housing 1042 encloses a first internal space 1078, in which motor 1046 is supported. Paint sprayer 1014 also includes a pump 1082, which is operably connected to motor 1046 and positioned in the first internal space 1078 of main part 1066. Pump 1082 is fluidically connected to nozzle assembly 1058 and mechanically connected to motor 1046. Paint sprayer 1014 further includes a reservoir 1086, which is positioned in housing 1042 and fluidically connected to pump 1082. Reservoir 1086 can receive, store and supply liquid for spraying. In particular, reservoir 1086 can receive liquid for spraying, store liquid for spraying and also supply liquid for spraying to pump 1082.

[0124] In the illustrated embodiment, the pump 1082 includes a first inlet 1090, a second inlet 1094 and an outlet 1096. The pump 1082 can be operated in both forward mode and reverse mode. In the forward mode, the pump 1082 sucks the spraying liquid through the first inlet 1090 and discharges the spraying liquid through the second inlet 1094 or the outlet 1096. On the contrary, in the reverse mode, the pump 1082 sucks the spraying liquid through the second inlet 1094 and discharges the spraying liquid through the first inlet 1090. By operating the motor 1046 in the first or forward rotation direction, the pump 1082 can be operated in the forward mode, and by operating the motor 1046 in the opposite second or reverse rotation direction, the pump can be operated in the reverse mode. In the illustrated embodiment, the pump 1082 is a gear pump. In other embodiments, the pump 1082 can alternatively be another type of pump, such as a piston pump, a diaphragm pump, a peristaltic pump, etc.

[0125] refer to Figures 18 to 20In the illustrated embodiment, the reservoir 1086 is a collapsible reservoir having a collapsible portion 1098 that is capable of expanding or contracting in response to the reservoir 1086 being loaded or unloaded with a spray liquid. The reservoir 1086 defines a variable internal volume 1102 and expands and contracts between a full state and an empty state. When the collapsible portion 1098 expands, the variable internal volume 1102 increases, and when the collapsible portion 1098 contracts, the variable internal volume 1102 decreases. In some embodiments, the variable internal volume 1102 of the reservoir 1086 in the empty state is ninety percent or less of the variable internal volume 1102 in the filled state. In other embodiments, the variable internal volume 1102 of the reservoir 1086 in the empty state is fifty percent or less of the variable internal volume 1102 in the filled state. As Fig. 20 As shown, the collapsible portion 1098 can be formed as a flexible bag 1098 having flexible walls 1106 formed, for example, from multiple layers of plastic material sheets that are joined (e.g., rolled, glued, etc.) on all edges. As the collapsible portion 1098 expands, the flexible walls 1106 unfold away from each other, and as the collapsible portion 1098 contracts, the flexible walls 1106 fold toward each other.

[0126] The reservoir 1086 also includes a rigid coupler 1114 coupled to the collapsible portion 1098. In the illustrated embodiment, the rigid coupler 1114 is fixedly attached to the collapsible portion 1098 and defines an inlet to the reservoir 1086. The rigid coupler 1114 has external threads.

[0127] Continue to refer Figures 18 to 20 , the paint sprayer 1014 also includes a reservoir adapter 1116. The reservoir adapter 1116 has internal threads and is removably threaded to the rigid coupler 1114 of the reservoir 1086. The reservoir adapter 1116 includes a connector plug 1117 that is sized and shaped to be removably coupled to the paint sprayer 1014, thereby fluidly connecting the pump 1082 to the reservoir 1086. Specifically, the paint sprayer 1014 includes a coupler receptacle 1122 supported within the housing 1042. The coupler receptacle 1122 is connected to the housing 1042 via a first passage 1126 ( Fig.21 ) is fluidly connected to the first inlet 1090 of the pump 1082. The coupler receptacle 1122 is removably fluidly coupled to the connector plug 1117, thereby fluidly connecting the reservoir 1086 to the pump 1082. Fig.21As shown, the connector plug 1117 carries a gasket 1127 (e.g., an O-ring) that creates a fluid-tight seal between the connector plug 1117 and the coupler receptacle 1122. The connector plug 1117 also carries a circular open spring ring or wire clasp 1128 that engages the coupler receptacle 1122 to secure the removable connection.

[0128] like Fig.18 As shown, the paint sprayer 1014 may also include an inlet plug 1129 that is externally threaded and can be screwed onto the reservoir adapter 1116 to replace the reservoir 1086 when the reservoir 1086 is disconnected. The reservoir adapter 1116 and the inlet plug 1129 can be installed in the coupler receptacle 1122 to prevent dust or other debris from entering the coupler receptacle 1122 when the reservoir 1086 is not installed. The housing 1042 includes a plug mount that protrudes into the second interior space 1130, and the inlet plug 1129 can be selectively installed into the second interior space and thereby stored when not in use.

[0129] refer to Figures 17 to 19 , the reservoir 1086 of the paint sprayer 1014 is completely enclosed within the housing 1042. The housing 1042 further defines and encloses a second interior space 1130, which is separated from the first interior space 1078 by a partition wall 1134. The reservoir 1086 is located within the second interior space 1130. The partition wall 1134 separates the reservoir 1086 from the first interior space 1078 so that leaking or overflowing spray liquid ejected from the reservoir 1086 can be contained within the second interior space 1130 and will not interfere with the motor 1046, the pump 1082, or other components located within the first interior space 1078. The partition wall 1134 can be formed as part of the clamshell half 1074 or can be formed as a separate component. The coupler receptacle 1122 protrudes at least partially through the dividing wall 1134 and into the second interior space 1130 , which allows the coupler receptacle to access the reservoir 1086 and couple to the reservoir adapter 1116 .

[0130] In the illustrated embodiment, the housing 1042 further includes a reservoir housing member 1138 coupled to the main portion 1066. In the illustrated embodiment, the reservoir housing member 1138 is formed as a door or cover 1138. The cover 1138 is removably coupled to the main portion 1066 and is selectively removed to expose the second interior space 1130 and allow insertion, removal, or replacement of the reservoir 1086. In the illustrated embodiment, the cover 1138 is completely removable from the main portion 1066 and is selectively secured to the main portion 1066 via engagement between projections 1139 on the reservoir housing member 1138, which are tightly received in slots 1140 defined in the main portion 1066 ( Fig.18 ). In other embodiments, such as in this article in conjunction with Figure 5 In the described embodiment, the cover can alternatively be secured to the main portion by a hinge (e.g., hinge 142) and can pivot about hinge axis 146 between an open position and a closed position. The cover 1138 can further be configured as described herein. Figure 5 The method is described in a manner consistent with the manner of securing to the main body portion 1066.

[0131] refer to Fig.19 When the paint sprayer 1014 is oriented in an upright orientation or a spraying orientation, the second interior space 1130 is generally located above the handle portion 1062. In this orientation of the paint sprayer 1014, the reservoir 1086 is also located above the handle portion 1062. Fig.19 As shown, the handle portion 1062 defines a longitudinal handle axis 1150 that intersects the second interior space 1130 and intersects the reservoir 1086 .

[0132] refer to Fig.21 and Fig. 22 , the paint sprayer 1014 further includes a second passage 1158 extending between the outlet 1096 of the pump 1082 and the nozzle assembly 1058 and fluidly connecting the outlet to the nozzle assembly. In this way, the reservoir 1086 is fluidly connected to the nozzle assembly 1058 via the first passage 1126, the pump 1082 and the outlet 1096. The third passage 1162 or delivery passage is fluidly connected to the second inlet 1094 and the second passage 1158 and extends to the sprayer delivery connector 1166 of the paint sprayer 1014. The sprayer delivery connector 1166 can be selectively and removably connected to the delivery hose 1022 ( Fig.15 ), the delivery hose can fluidly connect the sprayer delivery connector 1166 to an external source of spraying liquid, such as the paint tank 1038.

[0133] The pump 1082 can be operated in a reverse mode to draw the coating liquid from the paint tank 1038 into the reservoir 1086. Specifically, the coating liquid moves from the paint tank 1038 via the delivery hose 1022, the sprayer delivery connector 1166, the third passage 1162, the pump 1082, the first inlet 1090 via the second inlet 1094, the first passage 1126, and the coupler receptacle 1122 to the reservoir 1086. Alternatively, the pump 1082 can be operated in a forward mode to empty the reservoir 1086 and discharge the coating liquid from the paint sprayer 1014 along a similar path via the sprayer delivery connector 1166. The coating liquid exiting via the sprayer delivery connector 1166 can move through the delivery hose 1022 and flow back into the paint tank 1038 or back to another external container.

[0134] refer to Fig. 22 , the nozzle assembly 1058 includes a valve assembly 1274 having a valve body 1278 that defines a second passage 1158 through which the spray liquid enters the nozzle assembly 1058 from the outlet 1096. The valve assembly 1274 also includes a stop valve 1286 that includes a plunger 1290, a ball 1294 supported at the front end of the plunger 1290, and a ball seat 1298 in a facing relationship with the ball 1294. The plunger 1290 is biased toward a closed position by a spring 1302, wherein the ball 1294 is seated on the ball seat 1298.

[0135] During operation of the paint sprayer 1014, the spray liquid flows through the second passage 1158 and enters the annular space 1310 defined within the ball seat 1298 and the valve body 1278. The spray liquid within the annular space 1310 is pressurized due to the operation of the pump 1082 and exerts a force on the front end of the plunger 1290, causing the plunger 1290 to resist the biasing force of the spring 1302 and retract away from the ball seat 1298 to the open position. The spray liquid then flows through the opening in the ball seat 1298 and enters the nozzle assembly 1058.

[0136] Continue to refer Fig. 22 , the valve assembly 1274 also includes a pressure release button 1314 that can be actuated to manually retract the plunger 1290 to an open position (e.g., to facilitate cleaning of the valve assembly 1274 and the nozzle assembly 1058). The pressure release button 1314 is substantially the same in structure and function as the pressure release button 314 described herein.

[0137] The nozzle assembly 1058 includes a nozzle body 1330 having internal threads that are removably screwed to external threads on the valve body 1278. The nozzle body 1330 defines a guard portion 1334 and a cylindrical receiving seat 1346 that receives a removable and adjustable spray tip 1338. The spray tip 1338 is substantially similar to the spray tip 338 described herein. Like the spray tip 338, the spray tip 1338 can be removed from the receiving seat 1346, for example, to be cleaned or replaced with another spray tip. The spray tip 1338 can also be rotated 180 degrees in the receiving seat 1346 for cleaning, as described herein with respect to the spray tip 338.

[0138] refer to Fig.16 , the delivery hose 1022 includes a main hose segment 1170 and a hose delivery coupler 1174 coupled to the main hose segment 1170. The hose delivery coupler 1174 includes a hose delivery connector 1178 fluidly connected to the manifold 1650. The hose delivery connector 1178 is selectively connected to the sprayer delivery connector 1166 to fluidly connect the main hose segment 1170 to the paint sprayer 1014.

[0139] FIG. 23A to FIG. 25 Hose delivery connector 1178 and sprayer delivery connector 1166 are shown. Hose delivery connector 1178 includes handle 1654 defining a hollow interior, grip portion 1658 and connector portion 1662. Hose valve assembly 1666 is positioned within handle 1654 and fluidly coupled to main hose segment 1170.

[0140] The hose delivery connector 1178 also includes a hose valve stem 1670 that is axially non-movably secured within the handle 1654. The hose valve stem 1670 internally defines a hose stem passage 1672 that is fluidly connected to the manifold 1650. The manifold 1650 fluidly connects the hose valve stem 1670 to the main hose segment 1170. The hose delivery connector 1178 also includes an annular hose valve body 1674 that is concentrically disposed about the hose valve stem 1670 and within the handle 1654. The hose valve body 1674 defines an orifice 1678 that is normally closed by a hose stem head 1682 of the hose valve stem 1670. The hose valve body 1674 is slidably disposed about the hose valve stem 1670 and is urged toward a forward closed position ( 1678 ) by a hose valve spring 1686. Fig.24 ) is biased, and in this closed position, the hose rod head 1682 closes the orifice 1678.

[0141] The sprayer delivery connector 1166 includes a connector body 1690 and a sprayer valve assembly 1692. The connector body 1690 is annular and defines a hollow interior and is secured to the housing 1042. The connector body 1690 is also fluidly connected to the third passage 1162 and the second inlet 1094 of the pump 1082. The connector body 1690 defines an orifice 1698. The sprayer valve assembly 1692 includes a sprayer valve stem 1694 having a sprayer stem head 1702 that normally closes the orifice 1698 of the sprayer valve stem 1694. The sprayer valve stem 1694 is slidably disposed within the connector body 1690 and is urged toward a forward closed position ( Fig.24 ) is biased, and in this closed position, the sprayer rod head 1702 closes the orifice 1698.

[0142] like Fig.25 As shown, when the hose delivery connector 1178 is connected to the sprayer delivery connector 1166, the connector body 1690 presses against the hose valve body 1674, thereby retracting the hose valve body 1674 to an open position, in which the hose stem head 1682 no longer blocks the orifice 1678. The spray liquid is then allowed to flow into or out of the hose valve stem 1670 through the orifice 1678. Similarly, the hose stem head 1682 presses against the sprayer stem head 1702, thereby retracting the sprayer valve stem 1694 to an open position, in which the sprayer stem head 1702 no longer blocks the orifice 1698. The spray liquid is then allowed to flow into or out of the connector body 1690 through the orifice 1698. Therefore, Fig.25 Flow path 1710, shown by the arrow in FIG. 1 , extends from hose stem passage 1672, through orifice 1678 of hose valve body 1674, through orifice 1698, and through connector body 1690 (through an opening in sprayer valve stem 1694), into third passage 1162. Spray liquid can flow along flow path 1710 in either direction.

[0143] refer to Fig. 23B , the connector portion 1662 of the handle 1654 includes two mounting tabs 1714 that are positioned approximately 180 degrees apart from each other and protrude in both the axial direction and the radial direction. Each mounting tab 1714 defines a lug 1718 that protrudes radially inward from the inner surface of the mounting tab 1714. Fig.23C , the connector body 1690 defines two helical grooves or channels 1722 in its outer circumferential surface. Each channel 1722 includes an opening 1724 at its axial distal end and an axially extending notch 1726 at its opposite proximal end.

[0144] When the hose delivery connector 1178 is coupled to the sprayer delivery connector 1166, the lug 1718 is received into the corresponding channel 1722 via the opening 1724. The handle 1654 is then rotated (e.g., counterclockwise) so that the lug 1718 crosses the channel 1722, which pulls the hose rod head 1682 toward the sprayer rod head 1702 and causes both the hose valve assembly 1666 and the sprayer valve assembly 1692 to open. When the lug 1718 reaches the proximal end of the channel 1722, the lug 1718 is received in the recess 1726 and is retained in the recess under the action of the spring force of the hose valve spring 1686 and the sprayer valve spring 1706. The hose delivery connector 1178 is thereby selectively secured to the sprayer delivery connector 1166, and the paint sprayer 1014 can be loaded or unloaded with spraying liquid via the delivery hose 1022.

[0145] Reference again Fig.19 , the paint sprayer 1014 also includes a control system 1206 for controlling various operations of the paint sprayer 1014. The control system 1206 includes an electronic controller 1210 supported in the main part 1066 of the housing 1042. The controller 1210 controls the operation of the paint sprayer 1014 according to three operating modes, which include a loading mode, an unloading mode, and a spraying mode. When the hose delivery connector 1178 is connected to the sprayer delivery connector 1166, the paint sprayer 1014 can operate in the loading mode and the unloading mode. When the hose delivery connector 1178 is disconnected from the sprayer delivery connector 1166, the paint sprayer 1014 can operate in the spraying mode.

[0146] In the loading mode and the unloading mode, the hose delivery connector 1178 is connected to the sprayer delivery connector 1166, and the valve assemblies 1666, 1692 of the connectors 1166, 1178 are open. When the paint sprayer 1014 is operated in the loading mode, the motor 1046 is operated in the reverse rotation direction, and the pump 1082 is operated in the reverse mode to suck the spray liquid through the sprayer delivery connector 1166 (i.e., via the delivery hose 1022 inserted into the external container) and introduce the spray liquid into the reservoir 1086 to fill the reservoir 1086. When the paint sprayer 1014 is operated in the unloading mode, the motor 1046 is operated in the forward rotation direction, and the pump 1082 is operated in the forward mode to draw the spray liquid from the reservoir 1086 and discharge the spray liquid through the sprayer delivery connector 1166 (i.e., and into the external container via the delivery hose 1022). In the spray mode, the sprayer delivery connector 1166 is disconnected from the hose delivery connector 1178, and the sprayer valve assembly 1692 within the sprayer delivery connector 1166 is closed. When the paint sprayer 1014 is operated in the spray mode, the motor 1046 is operated in a forward rotational direction, and the pump 1082 is operated in a forward mode to draw the spray liquid from the reservoir 1086 and direct the spray liquid through the nozzle assembly 1058 to perform a paint spraying operation or a cleaning operation.

[0147] refer to Fig.18 , Fig.19 and Fig.26, the paint sprayer 1014 includes a barbed anchor 1728 positioned on one lateral side of the paint sprayer toward the rear end 1730 of the second interior space 1130. The control system 1206 also includes a sensor 1754 mounted on the reservoir, which is electrically connected to the controller 210 and is operable to detect when the reservoir 1086 is installed. The sensor 1754 mounted on the reservoir is also positioned on the other lateral side opposite the barbed anchor 1728 toward the rear end 1730 of the second interior space 1130. The sensor 1754 mounted on the reservoir includes a barbed plunger 1756 that is retractable from an extended position to a retracted position and is spring biased toward the extended position. When the reservoir 1086 is installed in the paint sprayer 1014, the barbed anchor 1728 and the barbed plunger 1756 are received in corresponding apertures (not shown) defined in the rear flap portion of the reservoir 1086 and are retained in the corresponding apertures by the barbed anchor and the corresponding barbs of the barbed plunger. Thus, the 1086 is anchored within the second interior space 1130 at three points (i.e., the rigid coupler 1114 of the sensor 1754 mounted on the reservoir, the barbed anchor 1728, and the barbed plunger 1756). When the barbed plunger 1756 is coupled to the flap of the reservoir 1086, the barbed plunger 1756 is pulled outwardly to an extended position against the bias of the spring. The barbed plunger 1756 actuates the switch 1738 to signal the controller 1210 that the reservoir 1086 is installed. When the reservoir 1086 is removed, the barbed plunger 1756 retracts and the switch 1738 signals the controller that the reservoir 1086 is removed.

[0148] In response to receiving a signal from the full reservoir sensor 1762 indicating that the reservoir 1086 is full, the controller 1210 can disable the operation of the motor 1046 to prevent the reservoir 1086 from being overfilled and ruptured. In some embodiments, the signal from the full reservoir sensor 1762 can be sent to the controller 1210 only when the paint sprayer 1014 is in the loading mode. In some embodiments, in response to receiving a signal indicating that the reservoir 1086 is full, the controller 1210 can actuate an indicator (not shown), such as an LED, to notify the user that the reservoir is full. The controller 1210 can turn off such an indication when it no longer receives a signal.

[0149] refer to Fig.19 , Fig.21 and Fig. 27, the control system 1206 also includes an empty reservoir sensor 1226 that is electrically connected to the controller 1210 and is operable to detect when the reservoir 1086 is empty. In the illustrated embodiment, the empty reservoir sensor 1226 detects a low pressure within the first passage 1126, which indicates that the reservoir 1086 is empty when the pump 1082 is operated in a forward mode corresponding to a spray mode or an unloading mode. The empty reservoir sensor 1226 includes an optical sensor 1232 and one or more permanent magnets 1234. The empty reservoir sensor 1226 also includes a diaphragm 1742 coupled to the plunger 1746. The diaphragm 1742 is in fluid communication with the first passage 1126. In some embodiments, the empty reservoir sensor 1226 further includes a biasing member 1750, such as a spring, which biases the diaphragm 1742 away from the first passage 1126.

[0150] In response to the low pressure of the spraying liquid in the first passage 1126, the diaphragm 1742 extends toward the first passage 1126, thereby causing the plunger 1746 to move. The plunger 1746 moves relative to the optical sensor 1232, causing the optical sensor 1232 to send a signal to the controller 1210 indicating that the reservoir 1086 is empty. In other words, when the pump 1082 is operated in the forward mode and the reservoir 1086 reaches an empty state, a low pressure is generated in the first passage 1126. The vacuum sensor 1226 detects the low pressure in the first passage 1126 and, in response, communicates a signal indicating that the reservoir 1086 is empty to the controller 1210. In response to receiving the signal indicating that the reservoir 1086 is empty, the controller 1210 can disable the operation of the motor 1046 to prevent the pump 1082 from running dry. In some embodiments, the signal from the empty reservoir sensor 1226 can be sent to the controller 1210 only when the paint sprayer 1014 is in the unloading mode or the spraying mode. In some embodiments, in response to receiving a signal indicating that the reservoir 1086 is empty, the controller 1210 can activate an indicator, such as an LED (not shown), to notify the user that the reservoir is empty. The controller 1210 can turn off such an indication when it no longer receives a signal.

[0151] refer to Fig.26 and Fig.28, the control system 1206 also includes a full reservoir sensor 1222. The full reservoir sensor 1222 detects when the reservoir 1086 is full. The full reservoir sensor 1222 includes a switch 1758, a plunger 1762, and a spring 1766. The spring 1766 biases the plunger 1762 toward the second interior space 1130 so that when the reservoir 1086 is not full, a portion of the plunger 1762 protrudes into the second interior space 1130. When the reservoir 1086 is installed in the second interior space 1130, the collapsible portion 1098 of the reservoir 1086 presses against the plunger 1762 when full, causing the plunger 1762 to retract. In the retracted state, the plunger 1762 engages the switch 1758, causing the switch 1758 to communicate a signal indicating that the reservoir 1086 is full to the controller 1210.

[0152] Continue to refer Fig.29 and Fig.30 , the control system 1206 also includes a delivery connection sensor 1242 that detects when the hose delivery connector 1178 is connected to the sprayer delivery connector 1166. The delivery connection sensor 1242 includes a collar 1770 that is concentrically positioned around the connector body 1690 and is rotatable relative to the connector body 1690 between a disengaged or unactuated position (not shown) and an engaged or actuated position (not shown). Fig.29 and Fig.30 The delivery connection sensor 1242 also includes a biasing member or spring 1774 that biases the collar 1770 toward the unactuated position. The delivery connection sensor 1242 further includes a switch 1778 that is electrically connected to the controller 1210.

[0153] refer to Fig.29 , the collar 1770 includes a first leg or tab 1782. The collar 1770 also includes a second leg or tab 1786 positioned proximate to the switch 1778. When the hose delivery connector 1178 is coupled to the sprayer delivery connector 1166, the mounting tab 1714 engages and pushes the tab 1782, thereby rotating the collar 1770 from the non-actuated position to the actuated position. In the actuated position of the collar 1770, the tab 1786 engages and actuates the switch 1778. This causes the switch 1778 to communicate a signal to the controller 1210 indicating that the hose delivery connector 1178 is connected to the sprayer delivery connector 1166. In response to the signal, the controller 1210 can disable the spray mode and can limit the speed of the motor 1046. In the absence of the signal, the controller 1210 can disable the loading mode and / or the unloading mode.

[0154] refer to Fig.31, the paint sprayer 1014 further includes a mode selection switch 1238 incorporated into the control system 1206. The mode selection switch 1238 is electrically connected to the controller 1210 and is operable to switch the operating mode of the paint sprayer 1014. In the illustrated embodiment, the mode selection switch 1238 includes a first mode selection button 1790 and a second mode selection button 1794. The first mode selection button 1790 is operable to place the paint sprayer 1014 in a loading mode and a spraying mode. For example, when the hose delivery connector 1178 is connected to the sprayer delivery connector 1166 and the first mode selection button 1790 is pressed, the controller 1210 places the paint sprayer 1014 in a loading mode. When the hose delivery connector 1178 is not connected and the first mode selection button 1790 is pressed, the controller 1210 places the paint sprayer 1014 in a spraying mode. When the hose delivery connector 1178 is connected to the sprayer delivery connector 1166 and the second mode selection button 1794 is pressed, the controller 1210 places the paint sprayer 1014 in the unloading mode. The mode selection switch 1238 also includes two indicators 1798 corresponding to the two corresponding buttons 1790, 1794. The indicator 1798 can be, for example, an LED indicator, and can indicate to the user whether the first mode selection button 1790 or the second mode selection button 1794 was last pressed, or whether the paint sprayer 1014 is in the loading mode or the unloading mode (or the spraying mode).

[0155] The control system 1206 also includes a variable speed selector 1254. The selector 1254 is actuated by a dial and is operable to adjust the speed of the motor 1046, for example, by changing the duty cycle of the motor 1046 via, for example, pulse width modulation. By changing the speed of the motor 1046, the flow rate and pressure of the spraying liquid discharged from the pump 1082 can be changed. In the embodiment shown, the selector 1254 can be operable only in the spraying mode to change the flow rate, pressure and / or spraying mode of the spraying liquid discharged from the nozzle assembly 1058. However, in the loading mode and the unloading mode, the speed of the motor 1046 can be limited and cannot be changed by adjusting the selector 254. This can be done for safety reasons, that is, in order to prevent overflow, splashing or splashing when the spraying liquid is unloaded from the reservoir 1086, or in order to prevent the reservoir 1086 from being damaged during the loading process.

[0156] Continue to refer Fig.31 , the paint sprayer 1014 also includes an indicator panel 1802 that is operable to indicate information to a user about the paint sprayer 1014. For example, the indicator panel 1802 may indicate information such as the setting of the speed selector 1254.

[0157] refer to Fig.28, the control system 1206 further includes a trigger switch 1246 that is operable to communicate an ON or OFF signal to the controller 1210. In response to the ON signal, the controller 1210 can activate the motor 1046. The trigger switch 1246 can be incorporated into the trigger assembly 1070 and can be actuated by the trigger 1250 of the trigger assembly 1070.

[0158] Coating system

[0159] Figure 32 to Figure 39 All or part of the painting system 1010 is shown in greater detail. As described herein, the painting system 1010 includes a paint sprayer 1014, a base assembly 1018, a delivery hose 1022, a container 1026, and a removable mount 1806 for a hose delivery connector 1178. The painting system 1010 may also operate with a paint tank 1038, which may be of different sizes and may contain paint material, colorant material, solvent material, anti-corrosion material, or other liquid for spraying.

[0160] Figure 33 to Figure 35 All or part of the delivery hose 1022 is shown in greater detail. The delivery hose 1022 includes a weighted member 1198 located at a distal end 1194 of the main hose segment 1170 opposite the hose delivery coupler 1174. The weighted member 1198 is configured to be positioned in a container containing a spraying liquid, such as a paint tank 1038. The weighted member 1198 can be formed of a material having a density greater than the density of the spraying liquid so that the weighted member 1198 will tend to sink toward the bottom of the container and remain submerged in the spraying liquid.

[0161] In the illustrated embodiment, the weighted member 1198 is formed into a filter assembly 1202 that includes a filter body 1810, a filter screen 1814, and a retaining clip 1818 (e.g., an open spring ring) that retains the filter screen 1814 within the filter body 1810. The filter screen 1814 can be removed and replaced by removing the retaining clip 1818 from the filter body 1810. The filter body 1810 is fluidly coupled to the main hose segment 1170 at the distal end 1194 via a barbed plug 1822.

[0162] The delivery hose 1022 also includes a pre-filling mechanism 1826 connected to the manifold 1650 of the hose delivery coupling 1174. When the paint sprayer 1014 is initially operated and there is no spraying liquid in the pump 1082, it may first be necessary to pre-fill the pump 1082 with the spraying liquid to make it operable. The pre-filling mechanism 1826 includes a syringe assembly 1830 and a pre-filling hose segment 1834 that fluidly connects the syringe assembly 1830 to the manifold 1650.

[0163] refer to Fig.33 and Fig.34 , the syringe assembly 1830 includes: a barrel 1838, which is fluidly coupled to the pre-fill hose segment 1834; and a plunger 1842, which is disposed within the barrel 1838. The barrel 1838 and the plunger 1842 define a pre-fill chamber 1840 having a variable volume, which changes as the plunger 1842 moves into or out of the barrel 1838. The spray liquid can be drawn into the pre-fill chamber 1840 and then forced out of the pre-fill chamber 1840 toward the pump 1082 of the paint sprayer 1014 to pre-fill the pump 1082, as will be explained herein. The syringe assembly 1830 also includes a syringe housing 1846, which receives and retains the barrel 1838. The syringe housing 1846 also defines a hose channel 1850, which receives and retains a portion of the main hose segment 1170. The syringe housing 1846 also includes a shaft segment or rod 1854 positioned proximate to the hose passage 1850. The rod 1854 provides a surface for clamping the main hose segment 1170 to selectively prevent the spray liquid from flowing through the main hose segment 1170 during the priming operation. In other embodiments (not shown), instead of clamping the main hose segment 1170, the main hose segment 1170 can be selectively blocked by another device, such as an in-line shutoff valve (not shown).

[0164] Fig.36A method 2000 of pre-filling a paint sprayer 1014 via a delivery hose 1022 using a pre-fill mechanism 1826 is shown. At step 2004, the paint sprayer 1014 is placed in a loading mode via a mode selector switch 1238. At step 2008, the hose delivery connector 1178 is connected to the sprayer delivery connector 1166. The distal end 1194 of the main hose section 1170 is also immersed in a container (e.g., a paint tank 1038) containing a spray liquid. At step 2012, the spray liquid is drawn into the pre-fill chamber 1840 of the syringe assembly 1830. This is accomplished by pulling the plunger 1842 out of the barrel 1838, which draws the spray liquid into the barrel 1838. Specifically, the coating liquid flows from the container into the main hose segment 1170, from the main hose segment 1170 to the manifold 1650, from the manifold 1650 to the pre-filled hose segment 1834, and then from the pre-filled hose segment 1834 into the barrel 1838. Alternatively, steps 2008 and 2012 may be performed in the reverse order. Specifically, the coating liquid may first be drawn into the pre-filled chamber 1840 (with the distal end 1194 immersed in the container), wherein the hose delivery connector 1178 is not yet connected to the sprayer delivery connector 1166, and then the hose delivery connector 1178 may be subsequently connected to the sprayer delivery connector 1166.

[0165] Next, at step 2016, when the pre-fill chamber 1840 is filled with the spray liquid, the main hose section 1170 is subsequently blocked to prevent the spray liquid from flowing through it. The main hose section 1170 can be blocked by clamping the main hose section 1170. For example, the main hose section 1170 can be tightly wrapped around the rod 1854 of the syringe housing 1846 to clamp the main hose section 1170. Next, at step 2020, the spray liquid is then forced to leave the pre-fill chamber 1840 and enter the pump 1082, while the main hose section 1170 is maintained in a blocked or clamped state. Specifically, the plunger 1842 is pushed back into the barrel 1838, which forces the spray liquid to leave the pre-fill chamber 1840 and enter the pre-fill hose section 1834. The spray liquid flows from the pre-filled hose segment 1834 into the manifold 1650, and because the main hose segment 1170 remains blocked, the spray liquid flows from the manifold 1650 into the hose delivery connector 1178, into the sprayer delivery connector 1166, and finally into the pump 1082 via the second inlet 1094 ( Fig.21). The pump 1082 is then primed and the main hose segment 1170 can be unblocked (step 2024). Any remaining excess spray liquid in the pre-fill chamber 1840 can be forced out, for example, by pressing the plunger 1842 into the rest of the barrel 1838. The remaining spray liquid that leaves the pre-fill chamber 1840 will flow through the main hose segment 1170 and back into the container once it is unblocked. The reservoir 1086 can then be loaded by pressing the trigger assembly 1070 to operate the pre-filled pump 1082.

[0166] Fig.37 and Fig.38 A painting system 1010 is shown in which a paint sprayer 1014, a delivery hose 1022, a paint tank 1038, a container 1026, and a mount 1806 are supported on a base assembly 1018. A distal end 1194 including a filter assembly 1202 is immersed in the paint tank 1038, and a hose delivery connector 1178 is connected to the sprayer delivery connector 1166. The painting system 1010 is thus arranged to operate in a loading mode to fill the reservoir 1086, to operate in an unloading mode to empty the reservoir 1086, or to perform a priming method 2000 to prime the pump 1082.

[0167] refer to Fig.39 and Fig.40 , the base 1030 includes a base wall 1382, a first support portion 1262, a second support portion 1386, a third support portion 1390, a fourth support portion 1450, and a container receptacle 1394. Each of the first support portion 1262, the second support portion 1386, the third support portion 1390, and the fourth support portion 1450, and the container receptacle 1394 can be coupled to the base wall 1382 or alternatively can be integrally formed with the base wall 1382.

[0168] The base 1030 also includes a hose guide mount 1398 coupled to the base wall 1382, which can help a user hold the hose in place and adjust the vertical position of the hose. The base assembly 1018 further includes a hose guide 1858 removably coupled to the hose guide mount 1398. The hose guide 1858 is rigid and elongated and defines a hose receiving channel that receives the distal end 1194 of the main hose segment 1170. When the paint can 1038 or other container is received in the fourth support portion 1450, the hose guide 1858 conveniently holds the distal end 1194 in the container.

[0169] The first support portion 1262 defines a first receiving seat 1408 that can removably receive and support a Fig.37 and Fig.38The paint sprayer 1014 is shown in an orientation with the spray tip 1338 positioned within a container 1026 that is held in a container receptacle 1394 with the spray tip 1338 pointing downward. The container 1026 thus catches drops of the spray liquid that may drip from the spray tip 1338. The container 1026 can be filled with water, mineral spirits, or another material that can help prevent the spray liquid in the paint sprayer 1014 (e.g., in the spray tip 1338) from drying or hardening.

[0170] The first support portion 1262 supports the weight of the paint sprayer 1014, wherein the spray tip 1338 is oriented downward and suspended within the container 1026. This orientation ensures safety and minimizes spillage during loading or unloading of the spray liquid into the reservoir 1086 (i.e., when operating the paint sprayer in loading mode or unloading mode). When the paint sprayer is supported in this manner, the user will not have to hold the paint sprayer 1014 during these operations. This allows the user's hands to be free to perform other steps of the loading process and unloading process.

[0171] In the illustrated embodiment, the second support portion 1386 includes a raised circular wall 1422 that projects upwardly from the base wall 1382 and defines a second receptacle 1426 for removably receiving the mount 1806. The mount 1806 receives and retains the hose delivery coupler 1174 when it is not connected to the paint sprayer 1014. Any spraying liquid that overflows from the hose delivery coupler 1174 is captured by the mount 1806, and the mount 1806 can be removed from the second receptacle 1426 for cleaning.

[0172] The third support portion 1390 provides a mounting surface to which the prefill bracket 1862 is mounted. The prefill bracket 1862 defines a prefill receptacle 1866 that selectively receives and retains the syringe assembly 1830. The prefill bracket 1862 makes it easier for the user to actuate the plunger 1842 with one hand and grip the main hose segment 1170 with the other hand during the pump priming process.

[0173] Similar to the paint sprayer 14 discussed herein, in some embodiments, the paint sprayer 1014 may include a tool support sensor (not shown) operable to detect when the paint sprayer 1014 is properly positioned in the first support portion 1262 of the base 1030. In other embodiments, the first support portion 1262 of the base 1030 may include a tool support sensor instead of the paint sprayer 1014. The tool support sensor of the base 1030 may detect that the paint sprayer 1014 is properly supported on the first support portion 1262 and communicate a signal (e.g., via RFID, Bluetooth, WiFi, NFC, wired communication, or other communication means) to the controller 1210. The controller 1210 will disable the spray mode in response to the signal.

[0174] Similar to the base 30 discussed herein, the base 1030 may further include a grounding connector (not shown) positioned on the first support portion 1262 to contact a grounding connector (not shown) of the paint sprayer 1014. The contact between the grounding connectors facilitates grounding the paint sprayer 1014 to reduce the possibility of arcing in the paint sprayer 1014 during loading or unloading. This improves the safety of the painting system 1010, especially when handling flammable fluids.

[0175] operate

[0176] Unless expressly described otherwise, the operation of the painting system 1010 and the paint sprayer 1014 , including the main operation, the cleaning operation, and the mixing operation, is substantially the same as the operation described herein for the painting system 10 and the paint sprayer 14 .

[0177] Although the present disclosure has been described in detail with reference to certain preferred embodiments, variations and modifications exist within the scope and spirit of one or more independent aspects of the present disclosure described. For example, the features and methods of the painting system 10 and the paint sprayer 14 can be used in the painting system 1010 and / or the paint sprayer 1014, and vice versa.

Claims

1. A paint sprayer, comprising: a housing enclosing an internal space; a nozzle assembly coupled to the housing; a pump assembly fluidly coupled to the nozzle assembly and positioned within the first region of the interior space; as well as A reservoir, fluidly coupled to the pump assembly and configured to contain a spray liquid, is positioned within the second region of the interior space.

2. The paint sprayer according to claim 1, wherein: The housing includes a first clamshell member and a second clamshell member, and wherein the second region of the interior space is at least partially defined between the first clamshell member and the second clamshell member.

3. The paint sprayer according to claim 2, wherein: The housing further includes a cover member coupled to the first clamshell member and the second clamshell member, and wherein the cover member partially defines a second region of the interior space.

4. The paint sprayer according to claim 3, wherein: The second region is completely enclosed by the first clamshell member, the second clamshell member and the cover member.

5. The paint sprayer according to claim 1, wherein: The reservoir is collapsible such that a first interior volume of the reservoir in a filled state is larger than a second interior volume of the reservoir in an empty state.

6. The paint sprayer according to claim 1, wherein: The housing includes a partition wall separating the first area from the second area.

7. The paint sprayer of claim 1, further comprising a delivery coupling configured to couple to an external source of the spraying liquid and supply the spraying liquid to the reservoir via the pump assembly.

8. The paint sprayer according to claim 1, wherein: The reservoir is selectively removable from the interior space.

9. The paint sprayer of claim 8, further comprising: an electronic controller configured to control operation of the pump assembly; as well as a sensor electrically connected to the electronic controller and configured to detect a reservoir within the interior space; Wherein the electronic controller disables the pump assembly in response to a signal from the sensor indicating that the reservoir is not within the interior space.

10. A paint sprayer, comprising: case; a nozzle assembly coupled to the housing; a pump assembly positioned within the housing and fluidly coupled to the nozzle assembly; as well as a collapsible reservoir fluidly coupled to the pump assembly and configured to contain a liquid for spraying, the collapsible reservoir including a flexible sidewall and defining a variable interior volume; wherein the collapsible reservoir is capable of moving between a filled state and a partially emptied state, wherein the collapsible reservoir defines a first internal volume in response to being in the filled state and defines a second internal volume in response to being in the partially emptied state, and wherein the second internal volume is less than fifty percent of the first internal volume.

11. The paint sprayer of claim 10, wherein: The housing encloses an interior space, wherein the pump assembly is positioned within a first region of the interior space, and wherein the collapsible reservoir is positioned within a second region of the interior space.

12. The paint sprayer of claim 11, wherein: The housing includes a partition wall separating the first area from the second area.

13. The paint sprayer of claim 10, wherein: The collapsible reservoir further includes a rigid coupler attached to the flexible sidewall.

14. The paint sprayer of claim 10, further comprising a delivery coupling configured to couple to an external source of the spraying liquid and supply the spraying liquid to the collapsible reservoir via the pump assembly.

15. The paint sprayer of claim 10, wherein: The housing includes a first clamshell member, a second clamshell member, and a cover member, and wherein the collapsible reservoir is enclosed within an interior space defined by the first clamshell member, the second clamshell member, and the cover member.

16. A paint sprayer, comprising: case; a nozzle assembly coupled to the housing; a pump assembly positioned within the housing and fluidly coupled to the nozzle assembly; as well as A collapsible reservoir is fluidly coupled to the pump assembly and is configured to contain a liquid for spraying, the collapsible reservoir comprising a flexible bag and a rigid coupler attached to the flexible bag.

17. The paint sprayer of claim 16, wherein: The housing encloses an interior space, wherein the pump assembly is positioned within a first region of the interior space, and wherein the collapsible reservoir is positioned within a second region of the interior space.

18. The paint sprayer of claim 16, wherein: The collapsible reservoir is capable of moving between a filled state and a partially emptied state, wherein the collapsible reservoir defines a first internal volume in response to being in the filled state and defines a second internal volume in response to being in the partially emptied state, and wherein the second internal volume is less than ninety percent of the first internal volume.

19. The paint sprayer of claim 16, wherein: The housing includes a first clamshell member, a second clamshell member, and a cover member, and wherein the collapsible reservoir is enclosed within an interior space defined by the first clamshell member, the second clamshell member, and the cover member.

20. The paint sprayer of claim 19, wherein: The collapsible reservoir is selectively removable from the interior space.

21. A paint sprayer, comprising: case; a nozzle assembly coupled to the housing; a pump assembly positioned within the housing and fluidly coupled to the nozzle assembly; a reservoir fluidly coupled to the pump assembly and configured to contain a spray liquid; as well as a delivery coupling fluidly coupled to the pump assembly and configured to selectively connect to an external source of the spraying liquid; Therein, the pump assembly is operable in a first mode to draw the spray liquid from the external source via the delivery coupling and fill the reservoir.

22. The paint sprayer of claim 21, wherein: The pump assembly is capable of operating in a second mode to pump the spray liquid from the reservoir, and wherein, in response to the delivery coupling being coupled to an external source of the spray liquid and operating the pump assembly in the second mode, the spray liquid is pumped from the reservoir and through the delivery coupling toward the external source.

23. The paint sprayer of claim 22, wherein: In response to the delivery coupling being disconnected from the external source of the spraying liquid and operating the pump assembly in the second mode, the spraying liquid is pumped from the reservoir and through the nozzle assembly.

24. The paint sprayer of claim 21, further comprising a valve assembly positioned downstream of the pump assembly and biased toward a closed position.

25. The paint sprayer of claim 24, wherein: The valve assembly is configured to open in response to a fluid pressure generated by the pump assembly exceeding a threshold pressure.

26. The paint sprayer of claim 21, further comprising an electronic control unit and a delivery connection sensor configured to detect whether the delivery coupling is coupled to an external source of the spraying liquid, wherein: The electronic control unit is configured to adjust the speed of the pump assembly in response to the signal from the delivery connection sensor.

27. The paint sprayer of claim 21, further comprising an electronic control unit and a full reservoir sensor, the full reservoir sensor being configured to detect whether the reservoir is full of the spraying liquid, wherein: The electronic control unit is configured to disable operation of the pump assembly in response to a signal from the full reservoir sensor.

28. The paint sprayer of claim 21, further comprising an electronic control unit and an empty reservoir sensor configured to detect whether the reservoir is empty, wherein: The electronic control unit is configured to disable operation of the pump assembly in response to a signal from the empty reservoir sensor.

29. A paint sprayer, comprising: case; a pump assembly positioned within the housing; as well as a nozzle assembly fluidly coupled to the pump assembly, the nozzle assembly comprising a spray tip defining an outlet orifice, a valve assembly positioned upstream of the outlet orifice and downstream of the pump assembly and biased toward a closed position, and an override actuator coupled to the valve assembly; wherein the valve assembly is configured to open in response to a fluid pressure generated by the pump assembly exceeding a threshold pressure; and Therein, the override actuator is operable to open the valve assembly regardless of the fluid pressure.

30. The paint sprayer of claim 29, wherein: The valve assembly includes a plunger, a valve seat, and a biasing member configured to bias the plunger toward the valve seat.

31. The paint sprayer of claim 30, wherein: The override actuator includes a button coupled to the plunger and operable to selectively move the plunger away from the valve seat.

32. The paint sprayer of claim 31, wherein: The override actuator further includes a spring that biases the button toward the unactuated position.

33. The paint sprayer of claim 31, wherein: The override actuator further includes a follower attached to the plunger, and wherein the button includes a cam portion configured to engage the follower to move the plunger.

34. A paint spraying system, comprising: a paint sprayer configured to spray a spray liquid, the paint sprayer comprising a pump assembly, a spray tip, and a sprayer delivery coupling fluidly coupled to the pump assembly; a delivery hose comprising a hose segment and a hose delivery coupler, the hose segment having a first end coupled to the hose delivery coupler and a second end configured to be in fluid communication with a source of the spraying liquid, the hose delivery coupler being configured to selectively and removably couple to the sprayer delivery coupler to establish a fluid connection between the pump assembly and the hose segment; as well as A base includes a base wall and a first support portion coupled to the base wall and defining a first receptacle configured to removably receive the paint sprayer.

35. The coating spraying system of claim 34, wherein: The base further includes a receptacle configured to receive the spray tip in response to the paint sprayer being received in the first receptacle.

36. The coating spraying system of claim 34, wherein: The source includes a first paint can, and wherein the base further defines a second receptacle configured to removably receive the first paint can.

37. The coating spraying system of claim 36, wherein: The base further defines a third receptacle configured to removably receive a second paint can having a smaller volume than the first paint can.

38. The coating spraying system of claim 34, wherein: The delivery hose further includes a pre-fill mechanism configured to introduce the spraying liquid into the pump assembly via the sprayer delivery coupling.

39. The coating spraying system of claim 38, wherein: The priming mechanism includes a syringe.

40. The coating spraying system of claim 34, wherein: The second end of the delivery hose is coupled to the filter assembly.

41. A method for pre-filling a paint sprayer of a paint spraying system, the paint spraying system comprising a delivery hose and a container for containing a spraying liquid, the delivery hose comprising a main hose section, a hose delivery connector and a pre-filling mechanism, the pre-filling mechanism comprising a pre-filling chamber, the method comprising: connecting the hose delivery connector to the paint sprayer; Aspirating the spraying liquid from the container into the pre-filling chamber of the pre-filling mechanism; as well as The spray liquid is forced out of the pre-fill chamber and into the paint sprayer.

42. The method of claim 41, further comprising placing the paint sprayer in a loading mode.

43. The method of claim 41, further comprising blocking the main hose section of the delivery hose.

44. The method of claim 41 further comprising placing the end of the main hose segment in the container.

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