CN110062664B - Reservoir system for a handheld spray gun - Google Patents

Abstract

A reservoir system (50) for use with a spray gun (32) is disclosed. The system includes a cup receptacle (60) and a lid (62). The closure (62) includes a closure body (70) and a collar (68). The closure body (70) provides a spout (72) and a platform (250) surrounding the spout (72). At least a portion of the platform (250) forms a partial helical shape that rotates about a central axis of the nozzle (72). A collar (68) is rotatably connected to the closure body (70). In addition, the collar (68) includes a lid connector structure configured to connect the lid (62) to the cup receptacle (60). In some embodiments, the reservoir system (50) further includes one or more of a fitting (54), a plug (600), and a shaker core (700).

Description

Reservoir system for a handheld spray gun

Background

The present disclosure relates to liquid spray coating devices, such as spray guns. More particularly, the present disclosure relates to reservoir systems for containing and supplying liquid to spray guns.

Liquid spray guns are often used to spray coatings such as stains, primers, paints, sealants, and the like onto a surface. For example, spray guns are widely used in body repair shops when repainting vehicles that have been repaired after an accident. In known spray guns, the liquid is contained in a reservoir or cup attached to the spray gun from which the liquid is fed to the spray nozzle. The liquid may be fed by gravity, or by suction, or more recently by pressure from a compressed air line to the spray gun or from the spray gun itself, using an air bleed line to the reservoir.

Disclosure of Invention

Traditionally, the liquid is contained in a rigid reservoir or tank that is removably mounted on the spray gun. In this way, the canister may be removed for cleaning or replacement. Previously, the can was secured to the gun in an empty state and provided with a removable closure by which the required liquid could be added to the can when the can was attached to the gun. After the spray coating is complete, the can may be removed and the gun and can cleaned for reuse.

More recently, reservoir systems have been developed that enable painters to mix less paint and greatly reduce the amount of technician time required for gun cleaning. PPS available from 3M company of St.Paul, Minn^TMThe paint preparation system provides a reservoir that eliminates the need for a conventional mixing cup and paint screen. PPS^TMThe paint preparation system reservoir includes a reusable outer container or cup, an open-top liner, a collar, and a closure. The liner fits tightly in the outer container and the paint (or other liquid) to be sprayed is contained within the liner. The closure is assembled to the liner and a spout or conduit is provided through which the contained paint is delivered. In use, the liner collapses as paint is withdrawn and after spraying, the liner and cover can be removed, allowing a new, clean liner and cover to be used for the next use of the spray gun. Thus, the amount of cleaning required is significantly reduced and the spray gun can be easily adapted to apply different paints (or other sprayable coatings) in a simple manner.

PPS^TMA paint preparation system is one example of a reservoir system for containing liquid and supplying liquid to a spray gun. Except for storageIn addition to the reservoir or cup, the reservoir system may also include one, two or more components that may or may not be directly used for a particular application. For example, regardless of the exact format, the reservoir or canister incorporates one or more connection features that facilitate removable assembly or attachment to the spray gun. In many cases, the spray gun and reservoir are designed in tandem, providing a complementary connection format that facilitates assembly of the reservoir directly to the spray gun. In other cases, the corresponding reservoir system will include a fitting for use between the reservoir and the spray gun. The adaptor has a first connection format at one end compatible with the spray gun inlet and a second connection format at the opposite end compatible with the reservoir outlet. The releasable connection between the spray gun and the reservoir is conventionally achieved via a standard threaded connection format using either method.

Any modification to the format of the header or connector is desirable. In addition, users desire to improve other components of the reservoir system, either alone or in combination with one another. For example, the cup receptacle, the lid, the connection between the lid and the cup receptacle, and ancillary components intended for use separately from the spray gun may all require modification.

The inventors of the present disclosure have recognized a need for a spray gun reservoir system that overcomes one or more of the problems set forth above.

Some aspects of the present disclosure relate to a closure for a spray gun reservoir system. The closure includes a closure body including a spout, a platform, and a wall. The platform at least partially surrounds the spout and defines a major plane and a partial helical shape. The partial helical shape is inclined with respect to the main plane and rotates about the central axis of the lance. The wall includes an outer face that adjoins the platform and includes a portion that is inclined relative to a major plane of the platform. In this regard, the partial helical shape interrupts the outer, angled portion of the wall. In some embodiments, the outer face of the wall comprises a dome shape or a cone shape. In other embodiments, a first end of the partial spiral shape is proximate to the transition zone of the major plane and a second end of the partial spiral shape interrupts the sloped portion of the outer face of the wall.

Other aspects of the present disclosure relate to a closure for a spray gun reservoir system. The closure includes a closure body and a collar. The closure body provides a spout and a platform surrounding the spout. At least a portion of the platform forms a partial helical shape that rotates about a central axis of the spout. The collar is rotatably connected to the closure body. Further, the collar includes a lid connector structure configured to connect the lid to the cup receptacle.

Other aspects of the present disclosure relate to a reservoir system for use with a spray gun. The system includes a cup receptacle and a lid. The closure includes a closure body and a collar. The closure body provides a spout and a platform surrounding the spout. At least a portion of the platform forms a partial helical shape that rotates about a central axis of the spout. The collar is rotatably connected to the closure body. Further, the collar includes a lid connector structure configured to connect the lid to the cup receptacle. In some embodiments, the cup receptacle includes a sidewall forming an aperture for viewing the contents of the internal cavity, and the aperture has a non-uniform circumferential width. In some embodiments, the closure body includes an outer face defining a continuous dome shape, and the platform defines a ramp surface projecting into the dome shape. In some embodiments, the reservoir system further comprises an adapter configured to connect the reservoir with the spray gun inlet port. In a related embodiment, the cap and the adapter provide a complementary connection format. In some embodiments, the reservoir system further comprises a stopper for sealing the spout. In related embodiments, the plug may include a plug sidewall having a stepped outer diameter. In some embodiments, the reservoir system further includes a shaker core that may be used, for example, to mount the reservoir into a shaker machine. In a related embodiment, the shaker core may define opposing first and second ends, wherein an inner diameter of the shaker core at the first end is smaller than a diameter of the shaker core at the second end.

Exemplary embodiments according to the present disclosure also include, but are not limited to, the embodiments listed below, which may or may not be numbered for convenience. Several additional embodiments not specifically enumerated in this section are disclosed in the accompanying detailed description.

The implementation scheme is as follows:

1. a closure for a spray gun reservoir system comprising:

a closure body, the closure body comprising:

a nozzle;

a platform at least partially surrounding the spout, wherein the platform defines a main plane and a partial helical shape that is inclined relative to the main plane and rotates about a central axis of the spout; and

a wall comprising an outer face adjoining the platform and comprising a portion inclined relative to a major plane of the platform;

wherein the partial spiral shape interrupts the inclined portion of the outer face of the wall.

2. The closure of embodiment 1, wherein the sloped portion of the outer face of the wall comprises a dome shape.

3. The closure of embodiment 1, wherein the sloped portion of the outer face of the wall comprises a tapered shape.

4. The closure according to any of embodiments 1 to 3, wherein a first end of the partial spiral shape is proximate to the transition zone of the main plane and a second end of the partial spiral shape interrupts the inclined portion of the outer face of the wall.

5. The closure of embodiment 4, wherein the second end of the partial helical shape terminates in a retention feature.

6. The closure of any of embodiments 1-5, further comprising a collar rotatably connected to the closure body.

7. The closure in accordance with embodiment 6, wherein the collar includes a closure connector structure configured to connect the closure to a compatible cup receptacle.

8. A closure for a spray gun reservoir system comprising:

a closure body comprising a spout and a platform at least partially surrounding the spout, wherein at least a portion of the platform forms a partial helical shape that rotates about a central axis of the spout, an

A collar rotatably connected to the closure body;

wherein the collar includes a closure connector structure configured to connect the closure to a compatible cup receptacle.

9. The closure of embodiment 8, wherein the deck defines a major plane and the partial spiral shape is inclined relative to the major plane, and further wherein the closure body comprises a wall comprising an outer face that adjoins the deck and comprises a portion that is inclined relative to the major plane of the deck, and even further wherein the partial spiral shape interrupts the inclined portion of the outer face of the wall.

10. The closure of embodiment 9, wherein the sloped portion of the outer face of the wall comprises a dome shape.

11. The closure of embodiment 9, wherein the sloped portion of the outer face of the wall comprises a tapered shape.

12. The closure according to any of embodiments 9 to 11, wherein a first end of the partial spiral shape is proximate to the transition zone of the main plane and a second end of the partial spiral shape interrupts the inclined portion of the outer face of the wall.

13. The closure of embodiment 12, wherein the second end of the partial helical shape terminates in a retention feature.

14. A reservoir system for use with a spray gun, the system comprising:

a cup receptacle; and

a closure, the closure comprising:

a closure body providing a spout and a platform surrounding the spout, wherein at least a portion of the platform forms a partial helical shape that rotates about a central axis of the spout, an

A collar rotatably connected to the closure body;

wherein the collar includes a lid connector structure configured to connect the lid to the cup receptacle.

15. The reservoir system of embodiment 14, wherein the cup receptacle comprises a cylindrical sidewall extending from the base end to the open end and defining an internal cavity, and further wherein an aperture is defined in the sidewall leading to the internal cavity for viewing the contents of the internal cavity from the exterior of the cup receptacle, and even further wherein the aperture has a non-uniform circumferential width.

16. The reservoir system of embodiment 15, wherein the aperture extends from a first side proximate the base end to an opposite second side proximate the open end, and further wherein a circumferential width of the aperture at the first side is greater than a circumferential width of the aperture at the second side.

17. The reservoir system of any of embodiments 14-16, wherein the closure body includes an outer face defining a continuous dome shape, and further wherein the platform defines a ramp surface having a first ramp segment extending from a first end to a second end, the first end being located longitudinally above the second end relative to an upright orientation of the closure, and even further wherein the ramp surface segment projects into the dome shape of the outer face.

18. The reservoir system of embodiment 17, wherein the ramp surface further includes a second ramp segment extending from the first end to the second end, the first end of the second ramp segment being adjacent to and longitudinally above the second end of the first ramp segment, and further wherein the closure body forms an undercut at the intersection of the first and second ramp segments, the undercut projecting into the outer domed shape.

19. The reservoir system of any one of embodiments 17-18, wherein a radial width of the first ramp segment at the first end is less than a radial width of the first ramp segment at the second end.

20. The reservoir system of any of embodiments 14-19, wherein the collar comprises a ring and a plurality of tabs projecting from an underside of the ring, a portion of the closure connector structure being carried by at least one of the tabs, and further wherein the ring has a variable radial width.

21. The reservoir system of embodiment 20, wherein circumferentially adjacent ones of the tabs are separated by a circumferential opening, and further wherein a radial width of the ring decreases at a location that is longitudinally aligned with at least one of the circumferential openings.

22. The reservoir system of any one of embodiments 20-21, wherein the ring defines at least one slot that aligns with a corresponding one of the tabs.

23. The reservoir system of any of embodiments 14-22, further comprising an adapter configured to selectively connect the spout with the spray gun inlet.

24. The reservoir system of embodiment 23, wherein the lid and the fitting comprise complementary connector features for selectively mounting the fitting to the lid.

25. The reservoir system of any one of embodiments 23-24, wherein the adapter comprises a tubular member and a base projecting from the tubular member, and further wherein the tubular member terminates at one end and the base defines a tracking surface opposite the end, and even further wherein at least a portion of the tracking surface forms a partial helical shape corresponding to a partial helical shape of the platform.

26. The reservoir system of any one of embodiments 23-25, wherein the adapter further comprises at least one locking structure protruding from an exterior face of the base.

27. The reservoir system of embodiment 26, wherein the at least one locking structure extends from a first end to an opposite second end and defines an abutment surface, an upper surface opposite the abutment surface, and a guide surface opposite the base, and further wherein a geometry of the abutment surface in a direction of extension from the first end to the second end is different than a geometry of the upper surface in a direction of extension from the first end to the second end.

28. The reservoir system of embodiment 27, wherein an insertion section extending from the first end and a locking section extending from the insertion section in the direction of the second end are defined above, and further wherein a major plane defined by the insertion section is not coplanar with a major plane defined by the locking section.

29. The reservoir system of embodiment 28, wherein the upper face further defines a tail section extending from the locking section in the direction of the second end, and further wherein a major plane defined by the tail section is not coplanar with a major plane defined by the locking section.

30. The reservoir system of embodiment 29, wherein the tail section is partially helical in shape.

31. The reservoir system of any one of embodiments 27-30, wherein the guide surface defines a first region extending from the first end and a second region extending from the first region in a direction of the second end, and further wherein the first region defines a uniform radius relative to a centerline of the tubular member, and even further wherein the second region defines a tapered radius relative to the centerline in a direction of extension from the first region toward the second end.

32. The reservoir system of any one of embodiments 26-31, wherein the lid further comprises at least one retaining structure configured to engage the at least one locking structure upon rotation of the adapter relative to the lid.

33. The reservoir system of any one of embodiments 14-32, further comprising a stopper for selectively sealing the spout, the stopper comprising a stopper body and a lip, wherein the stopper body defines a closed end opposite the forward end, and further wherein the lip projects radially from the forward end, and even further wherein the lip defines a plurality of gripping tabs.

34. The reservoir system of embodiment 33, wherein the plurality of grip tabs are equally spaced from each other.

35. The reservoir system of any one of embodiments 33-34, wherein the plurality of grip tabs comprises exactly three grip tabs.

36. The reservoir system of any one of embodiments 33-35, wherein the plug body defines a stepped outer diameter in a direction of extension from the closed end to the front end.

37. The reservoir system of any one of embodiments 14-36, further comprising a shaker core configured for selective mounting to the cover, the shaker core having a longitudinal length such that, when mounted to the collar, the shaker core extends beyond the spout.

38. The reservoir system of embodiment 37, wherein the shaker core defines opposing first and second ends, and further wherein an inner diameter of the shaker core at the first end is greater than an inner diameter of the shaker core at the second end.

39. The reservoir system of embodiment 38, wherein the agitator core further comprises an annular shoulder projecting radially inward from the hub adjacent the first end, the annular shoulder defining a flange for abutting a corresponding surface of the collar.

40. The reservoir system of embodiment 39, wherein the shaker core further comprises at least one key body protruding from the flange in the direction of the first end, wherein the key body is configured to be received within a corresponding recess defined by the collar.

Further, it should be understood that while several embodiments of the reservoir systems described above include components of such systems in combination (e.g., a lid, collar, cup receptacle, plug, and/or shaker core, etc.), the features of such components in combination are not inseparably joined such that the components may additionally or alternatively be viewed as stand-alone embodiments or form other combinations not explicitly set forth.

The term "liquid" as used herein refers to all flowable material forms capable of being applied to a surface using a spray gun (whether or not they are intended to color the surface), including, but not limited to, paints, primers, paints, lacquers, varnishes and similar paint-like materials as well as other materials such as adhesives, sealants, fillers, putties, powder coatings, blasting powders, abrasive slurries, mold release agents and casting dressings, which may be applied in atomized or non-atomized form depending on the nature of the material and/or the intended application, and the term "liquid" must be interpreted accordingly.

Drawings

FIG. 1 is a simplified perspective view of a spray gun assembly including a spray gun and a reservoir;

FIG. 2 is an exploded view of a reservoir system including a reservoir and an adapter according to the principles of the present disclosure;

FIG. 3 is a perspective view of a receptacle cup that may be used with the reservoir of FIG. 2;

FIG. 4 is a side view of the receptacle cup of FIG. 3;

FIG. 5 is a perspective view of a collar that may be used with the reservoir of FIG. 2;

FIG. 6A is a top plan view of the collar of FIG. 5;

FIG. 6B is a longitudinal cross-sectional view taken along line 6B-6B of the collar of FIG. 6A;

FIG. 7 is a perspective view of a closure body that may be used with the reservoir of FIG. 2;

fig. 8A is a perspective view of a closure that may be used with the reservoir of fig. 2, including the collar of fig. 5 assembled to the closure body of fig. 7;

FIG. 8B is a longitudinal cross-sectional view taken along line 8B-8B of the closure of FIG. 8A;

FIGS. 9A-9D illustrate the connection of the closure of FIG. 8A with the cup receptacle of FIG. 3;

FIG. 10A is a top plan view of the closure body of FIG. 7;

FIG. 10B is a side view of the closure body of FIG. 10A;

FIG. 10C is an end view of the closure body of FIG. 10A;

FIG. 11 is a transverse cross-sectional view taken along line 11-11 of the closure body of FIG. 10B;

FIG. 12 is an enlarged side perspective view of a portion of the closure body of FIG. 10A;

FIG. 13 is a longitudinal cross-sectional view taken along line 13-13 of the closure body of FIG. 10A;

FIG. 14A is an enlarged top plan view of a portion of the closure body of FIG. 10A;

FIG. 14B is an enlarged longitudinal cross-sectional view of a portion of the closure body of FIG. 14A taken along line 14B-14B;

FIG. 14C is an enlarged longitudinal cross-sectional view of a portion of the closure body of FIG. 14B taken along line 14C-14C;

FIG. 15A is a top perspective view of the fitting of FIG. 2;

FIG. 15B is a top plan view of the fitting of FIG. 15A;

FIG. 15C is a side view of the joint of FIG. 15A;

FIG. 15D is an end view of the fitting of FIG. 15A;

FIG. 15E is a longitudinal cross-sectional view of the fitting of FIG. 15A;

FIG. 15F is a bottom perspective view of the fitting of FIG. 15A;

FIGS. 16-19D illustrate the connection of the fitting of FIG. 15A to the closure of FIG. 8A;

FIG. 20 is a perspective view of another adapter in accordance with the principles of the present disclosure and usable with the reservoir systems of the present disclosure;

FIGS. 21A and 21B illustrate the connection of the fitting of FIG. 20 to a lance inlet port;

FIG. 22 is a perspective view of the adapter of FIG. 20 connected to the reservoir of FIG. 2;

23A and 23B are perspective views of a spray gun nozzle unit including an inlet port in accordance with the principles of the present disclosure;

24A and 24B are perspective views of another spray gun nozzle unit including an inlet port in accordance with the principles of the present disclosure;

FIG. 25A is a perspective view of a stopper according to the principles of the present disclosure and usable with the reservoir systems of the present disclosure;

FIG. 25B is a top plan view of the plug of FIG. 25A;

FIG. 26 is a side view of the stopper of FIG. 25A connected to the reservoir of FIG. 2 and supporting the reservoir on a surface;

fig. 27A is a top perspective view of a shaker core in accordance with the principles of the present disclosure and usable with the reservoir system of the present disclosure;

FIG. 27B is a bottom perspective view of the shaker core of FIG. 27A;

fig. 28 is a longitudinal sectional view of the shaker core of fig. 27A.

FIG. 29A is an exploded view showing the connection of the shaker core of FIG. 27A to the reservoir of FIG. 2;

FIG. 29B is a perspective view of the shaker core and reservoir of FIG. 29A upon final assembly;

FIG. 29C is a perspective view of the connected shaker core and reservoir of FIG. 29B and the plug of FIG. 25A connected to the reservoir;

FIG. 30A is an exploded view showing the connection of the shaker core of FIG. 27A to another reservoir, according to the principles of the present disclosure;

FIG. 30B is a perspective view of the shaker core and reservoir of FIG. 30A upon final assembly;

FIG. 31A is a perspective view of the adapter of FIG. 15A connected to the reservoir of FIG. 30A; and is

Fig. 31B is a perspective view of the adapter of fig. 20 connected to the reservoir of fig. 30A.

Detailed Description

Some aspects of the present disclosure relate to a reservoir system or kit for providing liquid to a spray gun. Additional aspects of the present disclosure relate to various components that may be used with a reservoir system or kit, such as a reservoir cap. By way of background, fig. 1 depicts one embodiment of a spray gun assembly 20, the spray gun assembly 20 including a reservoir system 30 according to the principles of the present disclosure assembled to a gravity-feed spray gun 32. Gun 32 may take a variety of forms and generally includes a body 34, a handle 36, and a spray nozzle 38 at a forward end of body 34. The spray gun 32 is manually operated by a trigger 40 pivotally mounted on the side of the body 34. An inlet port 42 (referenced generally) is formed in the body 34 or carried by the body 40 and is configured to establish fluid connection between an internal spray conduit of the spray gun 32 (hidden) and a reservoir 44 (referenced generally) of the reservoir system 30. The reservoir 44 contains a liquid (e.g., paint) to be sprayed and is connected to the inlet port 42 (it being understood that the connection implied by the figure of fig. 1 does not necessarily reflect the connection of the present disclosure). In use, the spray gun 32 is connected to a source of compressed air (not shown) via a connector 46 at the lower end of the handle 36. When a user pulls the trigger 40, compressed air is delivered through the spray gun 32 and paint is delivered under gravity through the spray gun 32 from the reservoir 44 to the spray nozzle 38. Thus, the paint (or other liquid) atomizes as it exits the nozzle 38 to form a spray with the compressed air exiting the nozzle 38.

In view of the foregoing background, fig. 2 illustrates one non-limiting example of a reservoir system 50 according to the principles of the present disclosure. The reservoir system 50 includes a reservoir 52 and an optional adapter 54. As described below, the reservoir systems of the present disclosure may include one or more additional optional components. With the system 50 of FIG. 2, the reservoir 52 includes a cup receptacle 60 and a lid 62. In some embodiments, the reservoir 52 may further include a liner 64. Generally, the liner 64 corresponds in shape to (and fits closely within) the interior of the cup receptacle 60 and may have a narrow rim 66 at the open end on the top edge of the cup receptacle 60. The closure 62 includes a flange or collar 68 and a closure body 70. The closure body 70 is configured to be push-fit in the open end of the liner 64 to locate the peripheral edge of the closure body 70 on the rim 66 of the liner 64. The lid/liner assembly is held in place by the collar 60 releasably engaging the cup receptacle 68, as described below.

The lid 62 forms a liquid outlet or spout 72 (referenced generally) through which liquid contained by the liner 64 may flow. In use, as paint is drawn from the reservoir 52, the liner 64 collapses in an axial direction towards the lid 62. Air may enter the cup receptacle 60 as the liner 64 collapses (e.g., via an optional vent hole in the base of the cup receptacle 60 (hidden), one or more openings in the side wall of the cup receptacle 60, etc.). Upon completion of spraying, the reservoir 52 may be disengaged from the spray gun 32 (fig. 1), the collar 68 released and the closure/liner assembly removed from the cup receptacle 60. The cup receptacle 60 remains clean and ready for reuse with a new lid 62 and liner 64. In this manner, over-cleaning of the reservoir 52 may be avoided.

The adapter 54 facilitates connection of the reservoir 52 to the spray gun inlet port 42 (fig. 1), as described in more detail below. Generally, the cover 62 provides a first connection format 74 (referenced generally) configured to releasably connect with a complementary second connection format 76 (referenced generally) provided with the adapter 54, wherein the adapter 54 further includes a spray gun interface feature configured for connection to the spray gun inlet port 42. Upon final assembly, the components of the reservoir system 50 are aligned along the central axis a.

The cup receptacle 60 is shown in more detail in figure 3. The cup receptacle 60 includes an annular sidewall 80 defining an internal cavity 82. The sidewall 80 terminates in an open end 84 providing access to the interior cavity 82. Opposite the open end 84 is a base end 86. The bottom plate 88 extends radially inward from the sidewall 80 proximate the base end 86 and has an annular shape defining an opening 90. During use, the opening 90 may serve as a vent for the reservoir 52 (fig. 2). Regardless, the floor 88 serves as a support for the liner 64 (FIG. 2) or provides support for the liner 64. As shown, the floor 88 may be slightly offset from the base end 86, wherein the base end 86 enables the cup receptacle 60 to be stably placed directly on a flat work surface. In some embodiments, one or more notches 92 may be defined in the sidewall 80 and open at the base end 86, effectively forming the base end 86 as a plurality of circumferentially separated legs that promote stable placement on a flat work surface.

At least one aperture or window 100 is formed through the thickness of the sidewall 80 to allow the contents of the cavity 82 to be viewed through the at least one aperture or window 100. In some embodiments, the apertures 100 may have a non-uniform or varying circumferential width. For example, the perimeter of the aperture 100 may be described as defining a first side 102 opposite a second side 104. As shown more clearly in fig. 4, first side 102 is proximate base end 86, but is longitudinally spaced from base end 86; second side 104 is proximate open end 84, but is longitudinally spaced from open end 84. The longitudinal extension of the bore 100 may be considered to define a first section 106 extending from the first side 102 and a second section 108 extending from the first section 106 to the second side 104. The width (or circumferential width) of the aperture 100 along the first section 106 is greater than the width of the aperture 100 along the second section 108. With this configuration, the relatively large area of the aperture 100 at the first section 106 provides a user with the ability to more easily discern the liquid level within the cavity 82. The larger area first section 106 may also be appropriately sized for passage of one or more fingers of a user, such as to grasp the liner 64 (fig. 2) when attempting to remove the closure 62 (fig. 2) from the liner 64 (and also to grasp the liner 64 through the opening 90 (fig. 3)). The smaller area second section 108 also provides the user with the ability to discern the liquid level in the cavity 82 when the cup receptacle 60 is inverted (such as when connected to a spray gun), but with minimal impact on the structural integrity of the cup receptacle 60. In other words, second side 104 is spaced from open end 84 such that sidewall 80 is circumferentially continuous and uninterrupted between open end 84 and aperture 100. This continuous loop of material provides increased hoop strength to the cup receptacle 60 at areas where the user is more likely to grip or hold the cup receptacle 60. Similarly, by minimizing the width or size of the aperture 100 along the second section 108 that would otherwise be closer to the open end 84 (as compared to the first section 106), the desired hoop strength of the cup receptacle at the area that the user is likely to hold is maintained while still providing knowledge of the liquid level.

With cross-reference between fig. 3 and 4, the tactile feedback members 110a, 110b (e.g., outwardly projecting ribs) may be formed or disposed at opposite sides of the aperture 100. The tactile feedback members 110a, 110b allow the user to know that they are gripping the area adjacent the aperture 100 without having to look at the cup receptacle 60 so that they can properly position their hand or hands and avoid inadvertently applying excessive pressure (such as by squeezing) through the aperture 100 to the liner 64 (fig. 2). It has been found that squeezing the liner 64 when the liner 64 is full of paint can cause paint to spill over (by forcing the paint up and out of the open end of the liner 64, or by accidental disconnection of the closure 62 (fig. 2) from the liner 64 by excessive deformation of the open end of the liner 64).

As can also be seen in the embodiment of FIGS. 3 and 4, the cup receptacle 60 includes a receptacle rim 118 and a receptacle connecting structure 120 proximate the open end 84. As described in greater detail below, the receptacle connection structure 120 enables the cover 62 (FIG. 2) to be secured to the cup receptacle 60 via the collar 68 (FIG. 2). Receptacle connecting structure 120 may include a plurality of receptacle engaging members 122 that resemble partial threads. Each receptacle engagement member 122 extends between opposite front and rear ends 124, 126. The front end 124 is closer to the open end 84 than the rear end 126, such that the front end 124 can be considered "higher" than the rear end (relative to the upright orientation of fig. 3 and 4). The cam surface 128 is defined between the leading end 124 and the trailing end 126, and may be linearly sloped as shown, or may be flat (non-sloped), curved, or may include any combination of sloped, flat, and/or curved portions. In some embodiments, the shape of the receptacle engagement member 122 is uniform from the front end 124 to the rear end 126 (i.e., the receptacle engagement member 122 is generally a continuous partial thread). Regardless of the particular configuration, the camming surface 128 is adapted to interact with complementary structure on the collar 68 to allow the collar 68 (and thus the cover 62) to be securely attached to the cup receptacle 60 such that the liner 64 (FIG. 2) is held in sealing relation between the cover 62 and the cup receptacle 60. In this regard, and for reasons that will become apparent below, adjacent ones of the receptacle engagement members 122 are circumferentially spaced from one another, thereby establishing gaps 130 (one of which is identified in fig. 4).

In some embodiments, the cup receptacle 60 may be formed of a polymeric or plastic material and may be a molded component. In one non-limiting example, the cup receptacle 60 is or includes polypropylene, although any other polymer, copolymer, combination of polymers, etc. is equally acceptable. In other embodiments, the cup receptacle 60 is metal. Further, the cup receptacle 60 may be formed to be transparent, translucent, or semi-transparent to facilitate viewing of the contents within the cup receptacle 60. In other embodiments, the material used to form (e.g., mold) the cup receptacle 60 may include a dye or pigment selected to provide a desired color.

Returning to fig. 2, the collar 68 may be initially formed separately from the closure body 70 and subsequently attached to form the finished closure 62. With this in mind, the collar 68 is shown in greater detail in FIG. 5 and includes or defines a ring 140 and a closure attachment structure 142 (referenced generally). Generally, the ring 140 is configured to be rotatably received by the closure body 70 (fig. 3). The lid connection structure 142 is configured to selectively interface with the receptacle connection structure 120 (fig. 3) of the cup receptacle 60 (fig. 3) and may be formed or carried by one or more tabs 144 protruding from the ring 140.

With additional reference to fig. 6A, the ring 140 defines a central opening 150 bounded by an inner edge 152. The inner edge 152 may define a circular or substantially circular shape (i.e., within 5% deviation from perfect circles). The outer edge 140 of the ring 154 is opposite the inner edge 152, wherein the radial width of the ring 140 is defined as the radial distance (relative to the central axis a) between the inner edge 152 and the outer edge 154. In some embodiments, ring 140 has a variable radial width. In other words, the ring 140 has a non-uniform radial width in a plane perpendicular to the central axis a (i.e., the plane of the view of fig. 6A). For example, the ring 140 forms or defines a tab portion 156. The tab portions 156 may be symmetrically disposed about the circumference of the ring 140, with each tab portion 156 corresponding to a respective one of the tabs 144. Circumferentially adjacent portions of the tab portion 156 are separated by a notch 158. In some embodiments, each of the recesses 158 is sized and shaped to receive a finger of a user to facilitate gripping and easy manipulation of the collar 68. In a related embodiment, the notch 158 may be sized, shaped, and positioned to interface with one or more other components of a corresponding reservoir system. In any event, the radial width of the ring 140 is reduced in the region of the notch 158 (as compared to the radial width at the tab portion 156). Slots 160 (one of which is identified in each of fig. 5 and 6A) may be formed through the thickness of each of the tab portions 156. Where provided, the slots 160 may each be configured to interface with one or more other components of a corresponding reservoir system. Further, the design of the slot 160 may facilitate injection molding of certain features of the collar 68 (e.g., by providing access by a slide in an injection molding die to enable formation of details on the inner surface of the tab 144).

As best shown in fig. 5, a flange rotation limiting feature 162 may be provided with the collar 68, formed as a nub or protrusion extending from the upper face of the ring 140. The flange rotation limiting features 162 may be positioned opposite each other relative to the circumference of the inner edge 152 and configured to selectively interface with corresponding features of the closure body 70 (fig. 2), as described in more detail below.

In some embodiments, the tabs 144 may have the same configuration, with each tab 144 protruding from the underside of the ring 140. In other embodiments, the tabs 144 need not be identical (e.g., two pairs of two differently configured tab designs). Circumferentially adjacent ones of the tabs 144 are separated by a flange opening 166 (one of which is identified in fig. 5), which also coincides with a corresponding one of the notches 158. The flange opening 166 may provide access for an end user's fingers to assist in gripping the cover 62 (fig. 2) for installation and removal. Such additional gripping functionality is particularly desirable where the end user may be wearing gloves and where the end user's hands (gloved or ungloved) may become slippery from wet paint or other residue. In some embodiments, one or more ribs 168 may be formed as external protrusions on each tab 144.

As described above, the lid connection structure 142 may be associated with the tabs 144, and in some embodiments includes a lid engagement member 170 carried by each tab 144. The lid engagement member 170 is approximately partially threaded. As shown in fig. 6B, each of the lid engagement members 122 extends between opposing leading and trailing ends 172, 174. The rear end 174 is closer to the ring 140 than the front end 172, such that the front end 172 can be considered "lower" than the rear end (relative to the upright orientation of fig. 6B). The cam surface 176 is defined between the front end 172 and the rear end 174, and may be linearly sloped as shown, or may be flat (non-sloped), curved, or may include any combination of sloped, flat, and/or curved portions. Regardless of the particular configuration, the camming surface 176 is adapted to interact with a complementary structure on the cup receptacle 60 (FIG. 3), as described below.

In some embodiments, the collar 68 may be formed from a polymeric or plastic material, and may be a molded component. In one non-limiting example, the collar 68 is or includes 30% glass filled polypropylene, although any other polymer, copolymer, combination of polymers, etc. is equally acceptable. In other embodiments, the collar 68 is metal. Further, the collar 68 may be formed to be transparent, translucent, or semi-transparent to facilitate viewing of the contents within the cup receptacle 60 (FIG. 3). In other embodiments, the material used to form (e.g., mold) collar 68 may include a dye or pigment selected to provide a desired color.

Returning to fig. 2, the closure body 70 generally includes features that facilitate assembly with the collar 68 to form the finished closure 62; features that facilitate fluid-tight mounting of the completed closure 62 with the cup receptacle 60 and liner 64 in cooperation with the collar 68; and features to facilitate connection with the joint 54 (e.g., the first connection format 74). To more fully understand the relationship between the completed closure 62 and cup receptacle 60 in accordance with the collar 68 as described above, corresponding features of the closure body 68 are described in detail below, followed by a detailed explanation of the first connection format 74 and the connector 54.

The closure body 70 is shown in more detail in fig. 7 and includes a spout 72 and a first connection format 74 (referenced generally). In addition, closure body 70 includes a wall 200, a rim 202, a skirt 204, one or more liner seal members 206, and a flange retention feature 208. The wall 200 defines an outer face 210 and an inner face (hidden in fig. 7, but shown at 212 in fig. 9D) opposite the outer face 210. The outer face 210 may have a curved or dome-like shape as shown, although other shapes and geometries are also acceptable (e.g., tapered). Outer face 210 extends from rim 202 to first connection format 74 and spout 72. A rim 202 projects radially outwardly from the periphery of the wall 200. A skirt 204 projects longitudinally from the rim 202. Liner seal member 206 is one or more ribs that project radially outward from skirt 204 for reasons that will become apparent below.

The flange retention features 208 may each approximate a finger or latch that projects from and above the outer face 210 and collectively serve to retain the collar 68 (fig. 2). For example, fig. 8A and 8B illustrate the final assembly of the collar 68 to the closure body 70 when forming the finished closure 62. The ring 140 is slidably positioned over the wall 200 and rim 202 with the flange retention features 208 cooperating to capture the collar 68 relative to the closure body 70. In the illustrated embodiment, a rotational or sliding interface is established between the collar ring 140 and the flange retention features 208, allowing the collar 68 to rotate relative to the closure body 70 (and vice versa). Rotation of the collar 68 relative to the closure body 70 is limited by selective abutment or interface between the flange rotation limiting features 162 provided with the collar 68 and corresponding ones of the flange retention features 208. With this configuration, the collar 68 is free to rotate relative to the closure body 70 in the first rotational direction (and vice versa) until the flange rotation limiting feature 162 is in abutting contact with a corresponding one of the flange retention features 208; in the event that further rotation of the collar 68 in the first direction is attempted, the closure body 70 will rotate with the collar 68.

The cross-sectional illustration of the closure 62 of fig. 8B shows that upon final assembly of the collar 68 to the closure body 70, the tabs 144 extend away from the rim 202 and are radially spaced from the hub 204. A void region or gap 220 is established between each of the lid engagement members 170 and the skirt 204. The provision of the void area 220 facilitates mounting of the lid 62 to the cup receptacle 60 (FIG. 2).

More specifically, FIG. 9A reflects the disposition of the cover 62 prior to mounting to the cup receptacle 60. As a point of reference, the liner 64 is disposed within the cup receptacle 60 and is therefore largely hidden from view; the rim 66 of the liner 64 is partially visible and identified in fig. 9A. The collar 68 is rotatably arranged relative to the cup receptacle 60 such that each of the tabs 144 is generally aligned with a corresponding one of the gaps 130 (two of which are generally identified in fig. 9A) between the receptacle engagement members 122 of the cup receptacle 60. The lid 62 may then be lowered onto the cup receptacle 60 as shown in FIG. 9B. In this regard, because tabs 144 are aligned with respective ones of gaps 130 (fig. 9A), cover engagement members 170 (fig. 5) carried by each of tabs 144 pass freely between receptacle engagement members 122. The cover 62 is substantially fully seated against the cup receptacle 60 (and/or liner 64) before the camming surfaces on either part engage, although not yet fully seated and tightened. The "snap" sensation and/or sound originates from a combination of: (i) liner sealing member 206 (fig. 9A) is quickly advanced into the open end of liner 64 such that a portion of liner 64 quickly stretches over liner sealing member 206 and then relaxes; and (ii) when the lid 62 is quickly dropped into contact, the lid body rim 202 (fig. 7) impacts the liner rim 66/receptacle rim 118, respectively. The "snap" feel or sound is further facilitated by the segmented configuration of the collar 68 (i.e., the notches 158 and corresponding flange openings 166). If the collar 68 is not segmented, a snap-fit feel is less likely to occur, allowing the user to undesirably "over-tighten" or screw the closure 62 into the liner 64, and possibly fold the liner 64 while doing so. This brief snap-on feel may tactilely and/or audibly assure the end user that the lid 62 and liner 64 are securely attached, even though the lid 62 is not yet secured to the cup receptacle 60.

The collar 68 may then be rotated relative to the cup receptacle 60 (and/or vice versa) to effect engagement between the cover engagement members 170 and corresponding ones of the receptacle engagement members 122. For example, the partial cross-sectional view of fig. 9C illustrates an initial interface between one of the receptacle engagement members 122 and one of the lid engagement members 170 as the collar 68 is rotated relative to the cup receptacle 60. With initial rotation, the front end 172 of the cover engagement member 170 is directed toward the front end 124 of the receptacle engagement member 122. In the seating arrangement described in the preceding paragraph, in which the cover 62 is seated atop the cup receptacle 60 and mounted to the liner 64 (fig. 2), the front end 172 of the cover engagement member 170 is located at a vertical position along the central axis a that is offset or "below" the front end 124 of the receptacle engagement member 122. Thus, with further rotation of the collar 68, the lid engagement member 170 readily passes "under" the receptacle engagement member 122. However, as the collar 68 is rotated further relative to the cup receptacle 60, the camming surface 128 of the receptacle engagement member 122 directly interfaces with the camming surface 176 of the lid engagement member 170. Specifically, as the collar 68 continues to rotate, the cam-like interface between the receptacle engagement members 122 and the lid engagement members 170 achieves a clamping force applied along the central axis a. Thus, the gripping movement of the lid 62 and cup receptacle 60 along the central axis A is achieved by rotation of the collar 68 to better ensure a secure connection. Furthermore, as shown, the optional placement of receptacle engaging member 122 and cover engaging member 170 as part of the threads that are easily activated not only allows for faster installation of cover 62, but also prevents possible thread cross-threading, reduces the amount of area where excess paint can collect and foul the assembly, and facilitates cleaning.

Fig. 9D reflects that the liner rim 66 is clamped between the receptacle rim 118 and the lid rim 202 as the lid 62 is finally connected to the cup receptacle 60 during formation of the finished reservoir 52, thereby providing a liquid seal. The liner 64 is also stretched or clamped between the liner sealing member 206 and the cup receptacle 60, further promoting a fluid-tight sealing relationship between the lid 62 and the liner 64. With this sealing arrangement, liquid (e.g., paint) disposed in liner 64 will flow from liner 64 along inner face 212 of closure wall 200 toward spout 72 (e.g., when reservoir 52 is inverted from the orientation of fig. 9D). The separate collar 68 is movably attached to the closure body 70 without fear of creating a leak path for paint.

In some embodiments, the closure body 70 may be formed of a polymeric or plastic material and may be a molded component. In one non-limiting example, the closure body 70 is or includes polypropylene, although any other polymer, copolymer, combination of polymers, etc. are equally acceptable. In other embodiments, the closure body 70 is metal. Further, the lid body 70 may be formed to be transparent, translucent, or semi-transparent to facilitate viewing of the contents within the cup receptacle 60. In other embodiments, the material used to form (e.g., mold) the closure body 70 may include a dye or pigment selected to provide a desired color.

Returning to fig. 7, the first connection format 74 (referenced generally in fig. 7) includes a platform 250, a first retention structure 252a, and a second retention structure 252 b. Generally, the platform 250 and the retaining structures 252a, 252b are formed on or project from the outer face 210 of the capping wall 200 at a location external to the spout 72 and are collectively configured to facilitate selective connection or installation with the complementary second connection format 76 (fig. 2) of the fitting 54 (fig. 2).

The platform 250 terminates in or defines a guide surface 260 that rotates about the nozzle 72. As best shown in fig. 10A-10C, the geometry of the guide surface 260 can be viewed as providing first and second guide segments 262a, 262b separated by first and second undercut or capture regions 264a, 264 b. The first guide segment 262a extends circumferentially in a clockwise direction from the first undercut 264a to the second undercut 264b, relative to a rotational direction defined by rotation (clockwise or counterclockwise) of the guide surface 260 about the nozzle 72, and has a geometry that creates an introduction region 266 and a ramp region 268. Then, relative to the clockwise direction, the lead-in region 266 is "forward" or "upstream" of the ramp region 268. Similarly, the second guide segment 262b may be considered to extend circumferentially from the second undercut 264b to the first undercut 264a in a clockwise direction and have a geometry that creates a lead-in region 266 and a ramp region 268.

In some embodiments, the guide segments 262a, 262b may be substantially identical, such that the following description of the first guide segment 262a applies equally to the second guide segment 262 b. The first guide section 262a is positioned to correspond with the first retaining structure 252 a. The major plane of lead-in area 266 can be substantially flat (i.e., within 5% deviation from a perfectly flat shape) and substantially perpendicular (i.e., within 5% deviation from a perfectly perpendicular relationship) to central axis a. The ramped region 268 tapers longitudinally downward (relative to the upright orientation of fig. 10B and 10C) in the direction of extension from the lead-in region 266 to the second undercut 264B, forming a partial helical shape. Thus, the lead-in region 266 is longitudinally or vertically "higher" than the ramped region 268 (relative to the upright orientation of fig. 10A and 10B), and the major plane of the ramped region 268 is oblique to the major plane of the lead-in region 266 (and not substantially perpendicular to the central axis a). A transition line or zone 270 is defined at the intersection of the lead-in region 266 and the ramp region 268 and is generally aligned with the first retention structure 252 a. The transition line 270 (and the transition line 270 associated with the second guide section 262 b) is more clearly evident in the cross-sectional view of fig. 11.

With continued reference to fig. 11, the guide surface 260 may have a varying or non-uniform radial width relative to the central axis a. The non-uniform radial width may be achieved by the inner edge 280 of the guiding surface 260 being circular (following the cylindrical shape of the nozzle 72), while the opposite outer edge 282 of the guiding surface 260 has a non-uniform shape. For example, the shape of the outer edge 282 along the lead-in region 266 of the first guide segment 262a (relative to the top plan view of fig. 11) may have an increasing radius in the direction of extension from the first undercut 264a toward the ramp region 268. Further, at least a segment along the shape of the outer edge 282 of the ramped region 268 may have an increasing radius in the direction of extension toward the second undercut 264 b. With this optional configuration, at the second undercut 264b, the radial width of the first guide section ramp region 268 is greater than the radial width of the second guide section lead-in region 266; similarly, at the first undercut 264a, the radial width of the second guide section ramp region 268 is greater than the radial width of the first guide section lead-in region 266.

The first and second undercuts 264a, 264b may be substantially identical and may be equally spaced about the spout 72. The geometric features created by the first undercut 264a are provided by the enlarged view of fig. 12. Consistent with the above description, the first undercut 264a forms or defines a transition between the ramp region 268 of the second guide section 262b and the lead-in region 266 of the first guide section 262 a. A shoulder or retention feature 290 is defined by the undercut 264a, extending between a forward end 292 of the first guide section 262a and a rearward end 294 of the second guide section 262 b. The major plane of shoulder 290 is non-parallel relative to the major plane of lead-in region 266 and relative to the major plane of ramp region 268, with shoulder 290 being in an upright orientation relative to fig. 12 above second segment ramp region 268).

Fig. 7 and 12 generally illustrate that in some embodiments, portions of the guide surface 260 protrude into the continuous shape (e.g., dome-shaped shape) of the outer face 210 of the wall 200 or otherwise reflect deviations in the continuous shape of the outer face 210 of the wall 200. The plane of the cross-sectional view of fig. 13 passes through the first undercut 264a and better reflects this optional feature. As shown, the outer face 210 has a continuously sloped shape (e.g., a dome-like shape, a conical shape, etc.) in a direction extending from the platform 250 toward the rim 202. The ramped area 268 of the second guide section 262b interrupts the continuous shape with the trailing end 294 being interior with respect to the shape of the outer face 210. In other words, in some embodiments, the platform 250 can be considered to protrude from the outer face 210 of the wall 200, with the guide surface 260 being defined primarily by the platform 250 and partially by the outer face 210. Alternatively, and with reference to between fig. 10B and 13, the closure body 70 can be viewed as including a platform 250 at least partially surrounding the spout 72. The platform 250 includes or forms at least one region (e.g., lead-in region 266) that serves as the uppermost surface of the platform 250 (relative to the upright orientation of fig. 10B and 13) and is substantially flat so as to define a major plane M of the platform 250. The platform 250 also includes or forms at least one region (e.g., the ramped region 268) having a partial helical shape that is inclined relative to the major plane M and rotates about the central axis C of the nozzle 72. The outer face 210 of the wall 200 abuts the platform 250 and includes a portion (generally identified at 296 in fig. 10B and 13) that is inclined relative to the major plane M of the platform 250. The partial helical shape of the platform 250 interrupts the sloped portion 296 of the outer face 210 of the wall 200. The angled portion 296 may define or include a dome shape, a conical shape, or the like. A first end of the partial spiral shape is proximate to a transition region (e.g., transition line 270 in fig. 10A) of the major plane M and an opposite second end of the partial spiral shape (e.g., back end 294) interrupts the sloped portion 296 of the outer face 210 of the wall 200. In some embodiments, the second end of the partial helical shape (e.g., the trailing end 294) terminates in a retention feature, such as one of the undercuts 264a, 264 b. With these configurations, the overall height of the closure body 70 (and thus the closure 62 (fig. 2)) is reduced (as compared to conventional spray gun connector formats), thereby ergonomically positioning the cup receptacle 60 (fig. 2) closer to the spray gun 32 (fig. 1) during use.

Returning to fig. 7, the retaining structures 252a, 252b may be identical such that the following description of the first retaining structure 252a applies equally to the second retaining structure 252 b. The first retention feature 252a is associated with a first segment 262a of the guide surface 260 and includes an arm 300 and a tab 302. The arm 300 is radially spaced from the spout 72 and projects axially upwardly from the wall 200. A stiffening rib 304 is optionally provided between the arm 300a and the wall 200 for controlling deflection of the arm 300 away from the spout 72 during use. A tab 302 projects radially inwardly from the arm 300 opposite the wall 200.

Referring to fig. 14A, the first retention structure 252a can be considered as defining opposing inlet and outlet ends 310 and 312. The inlet end 310 is "forward" or "upstream" of the outlet end 312 relative to the direction of rotation described above. The cross-sectional views of fig. 14B and 14C also show that a capture area 314 is defined by the first guide segment 262a, the arm 300, and the tab 302 for receiving corresponding features of the second connection format 76 (fig. 2).

More specifically, the projection of the arm 300 defines a housing surface 320. The housing surface 320 faces and is radially spaced from the exterior of the spout 72. The tab 302 projects radially inward relative to the housing surface 320 and defines an engagement surface 322 and an alignment surface 324. The engagement surface 322 faces the first guide segment 262a and is longitudinally spaced from the first guide segment 262 a. The alignment surface 324 faces the spout 72 and is radially spaced from the exterior of the spout. The radial spacing between the nozzle 72 and the engagement surface 322 and between the nozzle 72 and the alignment surface is sized to correspond with the geometric features of the adapter 54 (FIG. 2).

The geometry of the first guide segment 262a and the engagement surface 76 are configured to facilitate wedge-like locking engagement with corresponding features of the second connection format 76 (fig. 2). With particular reference to fig. 14C, the tab 302a is generally aligned with the transition line 270 between the lead-in region 266 and the ramp region 268. The shape of the engagement surface 322 defines a wedging section 330 and an optional void section 332. The wedging section 330 extends from the inlet end 310 and is aligned with the introduction zone 266 or disposed above the introduction zone 266. Void section 332 extends from wedging section 330 to exit end 312 and is aligned with or disposed above ramped area 268. The intersection of the wedging section 330 and the clearance section 332 is substantially aligned with the transition line 270. The engagement surface 322 is non-coplanar with a major plane along the wedging section 330 and a major plane along the clearance section 332.

Wedging section 330 is substantially flat (i.e., within 5% deviation from a perfectly flat shape) and the plane of wedging section 330 is not parallel to the plane of lead-in area 266. For example, the plane of wedging section 330 and the plane of lead-in area 266 combine to define an included angle in the range of approximately 1 to 70 degrees, such as 1 to 30 degrees. With this configuration, the longitudinal spacing or height of the capture area 314 tapers from the inlet end 310 to the outlet end 312, e.g., to a minimum dimension at the transition line 270. Due to this tapered or wedge-like shape, a rigid body that is initially inserted into the capture area 314 at the inlet end 310, and then directed toward the outlet end 312 (provided with the nipple 54 (fig. 2)) may be frictionally wedged or engaged within the capture area 314, as described below.

The voided section 322 (where provided) may also be substantially planar, and the plane of the voided section 332 is non-parallel with the major plane of the ramped region 268. The planes of the void section 332 and the ramp region 268 are arranged such that the longitudinal spacing or height of the capture region 314 expands in the direction of the exit end 312, e.g., expands or increases from the transition line 270 to the exit end 312.

With additional reference to fig. 14A, the retaining structures 252a, 252b are arranged such that the tapered-then-expanded shape of the capture area 314 of each retaining structure 252a, 252b is in the same rotational direction relative to the central axis a. For example, with respect to the orientation of fig. 14A, the inlet end 310 of the first retention structure 252a is rotationally "forward" of the corresponding outlet end 312 in a clockwise direction; similarly, the inlet end 310 of the second retention structure 252b is rotationally "forward" of the corresponding outlet end 312 in a clockwise direction. Thus, the capture area 314 (hidden in fig. 14A) associated with each of the retention structures 252a, 252b tapers in a clockwise direction. Fig. 14A also reflects that the inlet end 310 of each retention structure 252a, 252b can define a groove or ramp to further facilitate initial guidance of the body into the corresponding capture area 314. As shown, the alignment surface 324 of each retention structure 252a, 252b may be substantially planar, generally tangential to the circumference of the nozzle 72; in other implementations, the alignment surface 324 may have an arcuate or irregular shape.

Referring additionally to fig. 14B, the retaining structures 252a, 252B establish secure engagement with the complementary second connection format 76 (fig. 2) and are separated from the spout 72. With this configuration, and unlike existing fluid connector designs utilized with paint spray guns, the connection format of the present disclosure allows the spray tube 72 to exhibit a relatively large inner diameter. In some embodiments, the inner diameter of the nozzle 72 is no less than 20mm, or no less than 22mm, and optionally about 30 mm. Furthermore, by positioning capture region 314 proximate wall 200, the height of spray tube 72 may be reduced as compared to conventional spray gun reservoir connector designs. In some non-limiting embodiments, for example, the height of the spout 72 is about 5mm to 15 mm. Further, sealing features may be provided on spout 72 or with spout 72 for effecting a fluid-tight seal with a component inserted over the spout (e.g., joint 54 (fig. 2)), such as optional annular sealing rib 340 and/or optional spout sealing surface 342 (e.g., a chamfered or angled surface at forward end 344 of spout 72).

Returning to fig. 2, second connection format 76 is configured to selectively mate with features of first connection format 74 as described above, and in some embodiments is provided as part of joint 54. Referring to fig. 15A-15D, the joint 54 generally includes a tubular member 350 in addition to the second connection format 76 (referenced generally in fig. 15A). The tubular member 350 may include or provide features that approximate a conventional spray gun reservoir adapter, such as for establishing a connection to an inlet port of a spray gun. With this in mind, the tubular member 350 may take various forms and defines a central passageway 352. The passageway 352 is open at a front end 354 of the tubular member 350. Further, the tubular member 350 forms or provides a mounting feature that facilitates assembly to a conventional (e.g., threaded) lance inlet port. For example, external threads 356 may be disposed along the exterior of the tubular member 350 adjacent the front end 354 configured to threadably interface with threads provided with the lance inlet port. In this regard, the pitch, profile, and spacing of the external threads 356 may be selected according to the particular thread pattern associated with the make/model of spray gun for which the adapter 54 is intended. Other lance mounting features are equally acceptable which may or may not include or require external threads 356. The tubular member 350 may optionally further include or define a gripping section 358. Gripping section 358 is configured to facilitate user manipulation of joint 54 using conventional tools, and in some embodiments, includes or defines a hexagonal surface pattern adapted to be easily engaged by a wrench. In other implementations, the gripping section 358 may be omitted.

Second connection format 76 includes a base 360, a first locking structure 362a, a second locking structure 362b, and a tracking surface 364. The base 360 protrudes from the tubular member 350 and carries or forms the locking structures 362a, 362b and the tracking surface 264. The locking structures 362a, 362b are, in turn, configured to selectively interface with corresponding ones of the retaining structures 252a, 252b (fig. 7), and the tracking surface 364 is configured to interface with the guide surface 260 (fig. 7) as described below.

The base 360 includes a shoulder 370 and a ring 372. As best shown in fig. 15E, the shoulder 370 and the ring 372 combine to define a chamber 374, the chamber 374 opening into the passageway 352 of the tubular member 350 and configured to receive the spout 72 (fig. 2). The shoulder 370 extends radially outward and downward from the tubular member 350. A ring 372 projects longitudinally from the outer periphery of the shoulder 370 in a direction opposite the tubular member 350 and terminates at the tracking surface 364. In addition, ring 372 defines a cylindrical inner face 380 opposite an outer face 382. The inner diameter of the ring 372 (e.g., the diameter defined by the cylindrical inner face 380) corresponds to (e.g., is approximately or slightly larger than) the outer diameter of the nozzle 72. In some embodiments, ring 372 may define or provide joint sealing surface 284 along inner face 380, which corresponds with nozzle sealing surface 342 (FIG. 14B). The outer diameter of the ring 372 may vary in the direction of extension toward the tracking surface 364, as described below, or may be uniform. Regardless, the maximum outer diameter of ring 372 (e.g., the maximum diameter defined by outer face 382) is selected to nest within the clearance diameter collectively established by retaining structures 252a, 252b (fig. 7), as described below.

The geometry of the shape of the tracking surface 364 conforms to the geometry described above with respect to the closure guiding surface 260 (fig. 7). In particular, and with reference to fig. 15F, tracking surface 364 can be viewed as providing or creating a first track segment 390a and a second track segment 390b separated by first and second undercut or capture regions 392a, 392 b. The circumferential location and shape of the undercuts 392a, 392b correspond to the undercuts 264a, 264b (fig. 7) in the closure body 70 (fig. 7) described above. The track segments 390a, 390b have a shape and geometry corresponding to the guide segments 262a, 262b (fig. 7) described above. Thus, for example, track segments 390a, 390b may each be considered to generate a lead-in region 394 and a ramp region 396 (identified with respect to first track segment 390a in fig. 15F). The shape of the undercuts 392a, 392b creates a finger or retention feature 400 at the transition between the track segments 390a, 390 b. For example, as shown in fig. 15F, the finger 400 defined at the second undercut 392b extends between a forward end 402 of the second track segment 390b and a rearward end 404 of the first track segment 390 a.

In some embodiments, the locking structures 362a, 362b are identical, such that the following description of the first locking structure 362a applies equally to the second locking structure 362 b. The locking structure 362a defines a first end 420 opposite a second end 422 in a direction extending circumferentially along the ring 372, as best seen in fig. 15B. In addition, the locking structure 362a defines or forms an abutment surface 424 from the projection of the ring 372 opposite the upper face 426, as well as a guide surface 428 as best identified in fig. 15E. The shape of the abutment surface 424 follows or is continuous with a corresponding portion of the tracking surface 364. For example, and as best seen in fig. 15F, at first end 420, abutment surfaces 424 intersect first track segment 390a intermediate sloped region 396. In the direction extending from first end 420, the shape of abutment surface 424 mimics or follows the angled or partially helical orientation of ramp region 396; in addition, the shape of abutment surface 424 mimics or follows the substantially flat or planar shape of lead-in region 394 to second end 422.

With particular reference to fig. 15C, the upper face 426 is formed longitudinally opposite the abutment face 424 to define the height of the locking structure 362 a. In some embodiments, the plane or shape of upper face 426 varies between first end 420 and second end 422, forming locking structure 362a to provide insertion section 440, locking section 442, and optional tail section 444. The insertion section 440 includes a major plane of the upper face 426 that is non-parallel to a major plane of a corresponding region of the abutment face 424 such that the locking structure 362a has a reduced height at the first end 420. In other words, the height of the locking structure 362a increases along the insertion section 440 in a direction extending from the first end 420. In some embodiments, a chamfer may be formed in the upper face 426 at the first end 420, and the upper face 426 is substantially flat or planar along the remainder of the insertion section 440, arranged non-parallel to the abutment face 424. The upper face 426 is generally parallel to a corresponding region of the abutment face 424 along the locking segment 442, and creates a shape or geometry relative to the ring 372 that resembles a partial helix (the locking segment 442 associated with the second locking structure 362b is identified in fig. 15A, which also shows a partial helical shape). The tail section 444 may include an abutment surface 424 and an upper surface 426 that are substantially parallel in the direction of extension toward the second end 422 (fig. 15B). With this configuration, the vertical position of the locking structure 362a relative to the central axis a changes as the locking structure 362a rotates about the ring 372, with the first end 420 being vertically "lower" than the second end 422 relative to the upright orientation of the view.

As best seen in fig. 15B, the radial width of the locking structure 362a is defined by the radial (relative to the central axis a) distance between the ring 372 and the guide surface 428. With this in mind, the locking structure 362a may have a varying or non-uniform radial width relative to the central axis a. For example, the shape of the guide surface 428 (relative to the top plan view of fig. 15D) may define a uniform or slightly increasing radius in the direction extending from the first end 420, and a tapered or decreasing radius to the second end 422, thereby forming a streamlined appearance.

In some embodiments, the shape of the locking structure 362a is further demarcated from the ring 372 by an insert or recess 450, and more precisely formed relative to the ring 372, the insert or recess 450 can be formed in the face of the ring 372 adjacent to the locking structure 362a, and optionally a groove 452, as identified in fig. 15A. Regardless, the locking structures 362a, 362b are arranged about the ring 372 such that the spatial features are in the same rotational direction relative to the central axis a. For example, relative to the orientation of fig. 15B, the vertically lower first end 420 of each locking structure 362a, 362B is rotationally "forward" of the corresponding vertically higher second end 422 in a clockwise direction.

In some embodiments, the joint 54 is formed of a rigid material such as stainless steel (303S 31). Other materials, such as plastic, are also contemplated. Composite or other materials for use with a particular coating material and/or application are also acceptable.

The coupling of the reservoir 52 and adapter 54 begins with the alignment of the ring 372 with the spout 72, as shown in fig. 16. In the arrangement of fig. 16, the joint 54 is rotationally arranged such that the locking structures 362a, 362b are rotationally offset from the retaining structures 252a, 252 b. The nipple 54 is then directed onto the closure body 70 (and/or vice versa) with the spout 72 nested within the base 360.

In the initial assembled state of fig. 17A and 17B, the nipple 54 has been placed onto the closure body 70 as described above, with the locking structure 362a, 362B rotationally spaced from the retention structure 252a, 252B. Fig. 17C also illustrates the rotational arrangement of the tab 54 relative to the closure body 70 upon initial placement. With respect to the clockwise direction, the first end 420 of the first locking structure 362a is "forward" of the inlet end 310 of the first retaining structure 252a, and the first end 420 of the second locking structure 362b is "forward" of the inlet end 310 of the second retaining structure 252 b. The increased radial width of the locking structures 362a, 362b encourages a user to initially place the nipple 54 onto the closure body 70 in the rotational position shown. Returning to fig. 17A and 17B, a section of the tracking surface 364 of the tab 54 abuts the guide surface 260 of the closure body 70. For example, the cross-section of fig. 17D shows a portion of the ramped region 396 of the first track segment 390a abutting the ramped region 268 of the first guide segment 262 a. Due to the partial helical shape along the guide segments 262a, 262b of the closure body 70 and along the track segments 390a, 390b of the tab 54 as described above, fig. 17A reflects that the locking structures 362a, 362b are vertically "above" (relative to the orientation of fig. 17A) the capture area 314 (hidden in fig. 17A) of each of the retention structures 252a, 252b in this initial contact state between the tab 54 and the closure body 70.

The tab 54 is then rotated relative to the closure body 70 (and/or vice versa) to guide each of the locking structures 362a, 362b into engagement with a corresponding one of the retention structures 252a, 252 b. For example, and with reference to the first retaining structure 252a and the first locking structure 362a identified in fig. 17A-17C, the joint 54 may be rotated (e.g., clockwise) such that the first end 420 of the first locking structure 362a approaches and then enters the capture area 314 at the inlet end 310 of the first retaining structure 252 a. Due to the sliding interface and corresponding helical shape between the tracking surface 364 of the nipple 54 and the guide surface 260 of the closure body 70 (e.g., between the ramped region 396 of the first track segment 390a and the ramped region 268 of the first guide segment 262a as in fig. 17D), the nipple 54 is lowered or lowered vertically relative to the retaining structures 252a, 252b as the nipple 54 is rotated such that the first end 420 of the first locking structure 262a is aligned with the capture region 314 at the inlet end 310 as the first locking structure 362a approaches the inlet end 310 of the first retaining structure 252 a. For example, fig. 18A-18C illustrate a later stage of rotation of the fitting 54 relative to the closure body 70. As shown in the cross-section of fig. 18C, the first end 420 of the first locking structure 362a has entered the capture area 314 of the first retention structure 252 a. In this regard, as described above, due to the reduced height of the first end 420 of the locking structure 362a and the increased height of the catch region 314 at the inlet end 310, the locking structure 314 is easily guided into the catch region 426 with minimal interference between the upper face 426 of the locking structure 362a and the engagement surface 322 of the retention structure tab 302.

With continued rotation of the sub 54 relative to the closure body 70 (and/or vice versa), each locking structure 362a, 362b will be frictionally and mechanically locked within the capture area 314 of a respective one of the retention structures 252a, 252 b. Fig. 19A to 19C show the locked state of the reservoir 52 and the adapter 54. The tracking surface 364 (referenced generally) of the joint 54 has been further rotated relative to the guide surface 260 and along the guide surface 260 to achieve more complete engagement of the locking structure 362a, 362b within the corresponding one of the retaining structures 252a, 252 b. In addition, the undercuts 392a, 392b of tab 54 have engaged the undercuts 264a, 264b of closure body 70. For example, in the view of fig. 19C, an abutting interface is achieved between the fingers 400 of the tab second undercut 392b abutting the shoulder 290 of the closure body first undercut 264 a. This interface prevents over-rotation of the sub 54 relative to the closure body 70 (and/or vice versa) and serves to stabilize the connection assembly.

The cross-sectional view of fig. 19D shows first locking structure 362a secured within capture area 314 (referenced generally) of first retaining structure 252a and reflects the shape and spatial orientation of locking section 442 mimicking the shape and spatial orientation of capture area 314 along wedging section 330. In the locked condition, the abutment face 424 of the locking structure 362a abuts the lead-in area 266 of the closure body guide surface 260, and the locking section 442 of the upper face 426 of the locking structure 362a abuts the wedging portion 330 of the engagement surface 322 of the tab 302. The downward angular orientation of the guide surface 260 and the engagement surface 322, as well as the abutment surface 424 and the upper surface 426 along the wedging section 330 relative to a plane perpendicular to the axis of rotation, determines that as the locking structure 362a is progressively advanced through the capture area 314 (i.e., the first end 420 of the locking structure 362a is progressively advanced from the inlet end 310 of the retention structure 252 a), the nipple 54 is drawn or dragged downward (relative to the orientation of fig. 19D) onto the closure body 70, thereby promoting a fluid-tight seal between the components. For example, in some non-limiting embodiments, a seal may be established between annular sealing rib 340 (fig. 14B) of spout 72 and inner face 380 (fig. 15E) of fitting 54, between spout sealing surface 342 (fig. 14B) and fitting sealing surface 384 (fig. 15E), and so forth. Nozzle sealing surface 342 and coupling sealing surface 384 have complementary configurations designed to interfere and seal when the system is locked. The expanded height of capture region 314 along void section 332 to exit end 312 readily allows first end 420 to pass through for ease of assembly.

Returning to fig. 2, in addition to or in lieu of the adapter 54, the complementary second connection format 76 can also be incorporated into other adapter configurations that can optionally be provided with the reservoir systems and kits of the present disclosure (such as the reservoir system 50). For example, another embodiment of a fitting 500 that may be used with the reservoir systems and kits of the present disclosure is shown in fig. 20. The joint 500 includes a second connection format 76' (referenced generally), a tubular member 502, and opposing first and second clamps 504a, 504 b.

The second connection format 76 'may be highly similar to the second connection format 76 (fig. 15A) and includes a base 360', a first locking structure 362a, a second locking structure (hidden in fig. 20 but shown at 362b in fig. 15A), and a tracking surface 364 (referenced generally). The locking structures 362a, 362b and tracking surface 364 may be the same as described above. The base 360' may be similar in height to that described above with respect to the base 360 (fig. 15A). The base 360' has a different outer profile or shape than the base 360 and does not have to form an insert or recess 450 (fig. 15A). In addition, base 360' defines a sealing surface 508 around tubular member 502.

The tubular member 502 may include or provide features that approximate a conventional spray gun reservoir adapter, such as for establishing a connection to an inlet port of a spray gun. With this in mind, the tubular member 502 may take various forms and define a central passage 510. The passageway 510 opens at a front end 512 of the tubular member 502. Further, tubular member 502 optionally forms or provides a feature that facilitates a sealed connection to the lance inlet port. For example, a rib 514 may be disposed along an exterior of tubular member 502 adjacent front end 512, configured to sealingly interface with an interior surface of the lance inlet port.

The clamps 504a, 504b may be identical, each projecting from the base 360' at opposite sides of the tubular member 502. Each clamp 504a, 504b terminates at a head 520 and defines an engagement surface 522 radially spaced from the tubular member 502. A latching surface 524 is defined at the intersection of the head 520 and the engagement surface 522. The longitudinal distance between the latch surface 524 and the sealing surface 508 corresponds to the geometric feature of the spray gun inlet port, as does the transverse distance between the opposing engagement surfaces 522. For example, fig. 21A shows the fitting 500 and the inlet port 530 and spray nozzle assembly 532 (referenced generally) of the spray gun. The inlet port 530 includes an inlet tube 534 and a connector assembly 536. The inlet tube 534 is fluidly connected to an outlet 538 of the spray nozzle assembly 532. The outer diameter of the tubular member 500 of the fitting 502 corresponds to the inner diameter of the inlet tube 534. The connector assembly 536 can take various forms, and in some embodiments includes a first flange 540 and a second flange 542 that project radially from the inlet tube 534. The flanges 540, 542 may have different peripheral shapes or outer diameters, as shown. The lateral distance between the engagement surfaces 522 of the clamps 504a, 504b is selected to be greater than the smallest outer diameter of the flange varying peripheral shape and less than the largest outer diameter. Additionally, the longitudinal distance between the sealing surface 508 and the latching surface 524 of each of the clamps 504a, 504b is selected to approximate the longitudinal spacing between the opposing faces of the flanges 540, 542.

With the above configuration, the fitting 500 may be connected to the inlet port 530 by first spatially arranging the fitting 500 such that the tubular member 502 is aligned with the inlet tube 534 and the clamps 504a, 504b are aligned with the reduced diameter portions of the peripheral shape of the flanges 540, 542. The tubular member 502 may then be inserted into the inlet tube 534 with the clamps 504a, 504b "passing" through the flanges 540, 542. The fitting 500 is then rotated relative to the inlet port 530, causing the clamps 504a, 504B to engage the flanges 540, 542, as shown in fig. 21B. In the installation arrangement of fig. 21B, the tubular member 502 (fig. 21A) is fluidly sealed within the inlet tube 534 and the flanges 540, 542 are securely captured by the clamps 504a, 504B, including a first flange 540 abutting the sealing surface 508 (fig. 20) of each of the clamps 504a, 504B and a second flange abutting the latching surface 524 (fig. 20) of each of the clamps 504a, 504B. In addition, the periphery of the flanges 540, 542 abuts the engagement surface 522 (fig. 21A) of the clips 504a, 504b, better ensuring a secure connection.

Other lance inlet port connection formats may be incorporated into the fitting 500. Regardless, the reservoir connection features (e.g., second connection format 76') of the adapter 500 provide a secure assembly to the reservoir 52 according to the description above, and is generally reflected in fig. 22.

One or more of the above-described connection formats (e.g., second connection format 76, 76') may be incorporated into other spray gun reservoir system components in accordance with the principles of the present disclosure. For example, a nozzle unit 550 according to the principles of the present disclosure is shown in fig. 23A and 23B and is provided as part of a spray gun, such as the spray gun 32 (fig. 1) described above. The nozzle unit 550 includes an inlet port 552 and a spray nozzle assembly 554 (referenced generally). The inlet port 552 includes an inlet tube 556 and a second connection format 76' (referenced generally). An inlet tube 556 is fluidly connected to an outlet 558 of spray nozzle assembly 554. Second connection format 76 'may have a configuration as described above, including a base 360', a first locking structure 362a, a second locking structure 362b, and a tracking surface 364. Accordingly, the second connection format 76' provided with the nozzle unit 550 is configured for direct connection to a reservoir of the present disclosure, such as reservoir 52 (fig. 2). With these embodiments, the lance inlet port 552 may be considered a component or part of a lance reservoir system.

Another embodiment of a spray gun nozzle unit 570 in accordance with the principles of the present disclosure is shown in fig. 24A and 24B and is provided as part of a spray gun, such as the spray gun 32 (fig. 1) described above. Nozzle unit 570 includes an inlet port 572 and a spray nozzle assembly 574 (referenced generally). The inlet port 572 includes an inlet tube 576 and a second connection format 76' (referenced generally). Inlet tube 576 is fluidly connected to outlet 578 of spray nozzle assembly 574. Second connection format 76 'may have a configuration as described above, including a base 360', a first locking structure 362a, a second locking structure 362b, and a tracking surface 364. Accordingly, the second connection format 76' provided with the nozzle unit 570 is configured for direct connection to a reservoir of the present disclosure, such as reservoir 52 (fig. 2). With these embodiments, the lance inlet port 572 can be considered a component or part of a lance reservoir system.

The reservoir system (e.g., reservoir system 50 of fig. 2) may include one or more additional auxiliary components and may be provided as a reservoir system kit. For example, an optional stopper 600 that may be used with the reservoir systems and kits of the present disclosure is shown in fig. 25A and 25B. The stopper 600 includes or defines a stopper body 602 and a lip 604. The plug body 602 has a closed end 606 and a sidewall 608. Sidewall 608 protrudes from closed end 606 and defines a diameter of stopper body 602 that is selected according to a feature of the corresponding reservoir, such as a diameter of a reservoir spout (e.g., closure body spout 72 (fig. 7)) adapted to effect a seal with the spout upon insertion. In some embodiments, sidewall 608 can have a stepped outer diameter, such as a first diameter along first region 610 and a second diameter along second region 612. The diameter along the second region 612 may be larger than the diameter of the first region 610, e.g., selected to provide a sealed interface with the reservoir spout. With this configuration, the stopper 600 may be inserted into and sealed against the reservoir spout in a manner that allows for temporary sealing and protection of the reservoir (including paint or other liquids stored therein), including an inverted storage orientation. The diameter along the first region 610 or the second region 612 may be selected to interface with other components of a corresponding reservoir system or kit, for example, to provide a sealed interface with a component of a fitting disposed with the system, e.g., with the fitting tubular member 350 (fig. 15A). Other geometric features are also acceptable.

A lip 604 protrudes radially outward from the stopper body 602 opposite the closed end 606 and provides a surface for gripping by a user. In some embodiments, the lip 604 is sized and shaped to define one or more tabs 614. In one embodiment, the lip 604 forms exactly three identically shaped and equally spaced tabs 614, as best shown in fig. 25B. The tab 614 facilitates a user in grasping the stopper 600 when the stopper 600 is inserted into the reservoir system component. Furthermore, when the stopper 600 is secured to the reservoir 52 and the reservoir 52 is stored in an inverted orientation as shown in fig. 26, in embodiments provided with three equally spaced tabs 614, the tabs 614 readily support the reservoir 52 in an inverted position relative to the storage surface 616.

Stopper 600 may be formed of various suitable materials (in combination with the geometric features of stopper 600) for achieving a tight seal with reservoir 52, adapter 54 (fig. 2), and the like. For example, in some non-limiting embodiments, stopper 600 is or comprises low density polyethylene.

Another optional auxiliary component that may be included with the reservoir systems (e.g., reservoir system 50 of fig. 2) and kits of the present disclosure is a shaker core 700 shown in fig. 27A and 27B. As a point of reference, a user may desire to use an industrial-type "shaker" machine to mix paint stored within a reservoir (such as reservoir 52 of fig. 2). Most shaker machines employ a clamping system or device to hold the reservoir in place during operation. In this regard, the shaker core 700 is temporarily assembled to a reservoir for dispensing clamping forces applied by the shaker machine. With this in mind, the shaker core 700 is a generally cylindrical body that extends between a first end surface 702 (best seen in FIG. 27B) opposite a second end surface 704 (best seen in FIG. 27A) and includes or defines a centering ring 706. One or more ribs 708 are optionally provided to longitudinally support the ring 706. The end surfaces 702, 704 are each configured to provide a surface adapted to engage a shaker machine gripping apparatus. The first end surface 702 is provided as part of a first end section 710 (referenced generally) and the second end surface 704 is provided as part of a second end section 712 (referenced generally). In some embodiments, each of the end sections 710, 712 includes a mating feature configured for assembly onto a reservoir, wherein the mating feature of the first end section 710 is different (e.g., in size) from the mating feature of the second end section 712 such that the shaker core 700 may be used with differently configured reservoirs. The shaker core 700 may be formed from a variety of materials suitable for maintaining the structural integrity of the shaker core 700 when utilized with shaker machines. In some non-limiting embodiments, for example, the shaker core 700 is or includes Acrylonitrile Butadiene Styrene (ABS).

For example, and with additional reference to fig. 28, the first end section 710 includes or defines an annular shoulder 720, a skirt 722, and one or more key bodies 724. An annular shoulder 720 projects radially outward from central ring 706, wherein an interior surface of central ring 706 and annular shoulder 720 combine to define a flange 726 (best seen in fig. 27B). A skirt 722 projects longitudinally from the annular shoulder 720 opposite the central ring 706 and terminates in the first end surface 702. The key bodies 724 each project radially inward from the skirt 722 along a flange 726. In some embodiments, four of the key bodies 724 are provided and are equally spaced around the circumference of the flange 726. Any other number and spatial arrangement is also acceptable. Regardless, the geometric features of the first end section 710 (e.g., the size and/or shape of the skirt 722, the flange 726, and/or the key body 724) may be configured to facilitate secure interfacing with corresponding features of a reservoir, such as the reservoir 52 (fig. 2).

For example, fig. 29A shows the shaker core 700 relative to the reservoir 52. The first end section 710 of the shaker core 700 is configured to interface with the cover 62 of the reservoir 52. The inner diameter of the skirt 722 is selected to approximate (e.g., be equal to or slightly larger than) the largest outer diameter of the closure 62, and in particular the collar 68. In embodiments where the collar 68 includes the tabs 144 and the tabs 144 each include or provide one or more of the external ribs 168, the inner diameter of the skirt 722 approximates the diameter collectively defined by the tab ribs 168. With this configuration, the first end section 710 may be placed over the lid 62 with the inner surface of the skirt 722 abutting the rib 168 or immediately adjacent the rib 168. Key body 724 may be sized, shaped, and circumferentially positioned according to the size, shape, and position of collar recess 158. Accordingly, assembly of the first end section 710 onto the cover 62 includes nesting each of the key bodies 724 within a corresponding one of the notches 158. When so arranged, the flange 726 abuts the collar 68 and rotational movement of the shaker core 700 relative to the collar 68 (and vice versa) is significantly restricted by the interface between the key body 724 and the collar 68. In some embodiments, a friction fit is provided between key body 724 and collar 68 at corresponding recesses 158. Regardless, the height or longitudinal dimension of the shaker core 700 from the flange 726 to the second end surface 704 is selected to be greater than the height or longitudinal dimension of the cover 62 from the collar 68 to the spout 72. With this configuration, and as reflected by fig. 29B, when the first end segment 710 is connected or mounted to the closure 62 as described above, the second end surface 704 extends longitudinally beyond the spout 72 in preparation for engagement with a shaker machine gripping device (not shown). Further, when "keyed" to the collar 68 (FIG. 29A) as in FIG. 29B, the shaker core 700 may be used as a tool to assist in loosening or unscrewing the collar 68 from the cup receptacle 60. For example, when paint or other residue is present between the cup receptacle 60/collar 68 interface, it may be difficult for a user to apply sufficient force or torque to the collar 68 when the user is directly gripping the collar 68. In these cases, the shaker core 700 may be attached to the collar 68 as shown, and provide a large surface area for grasping and subsequently applying sufficient manual loosening force or torque. Fig. 29C shows a related embodiment system of the present disclosure in which the shaker core 700 is connected to the reservoir 52 as described above, and an optional plug 600 is also provided and sealed to the reservoir 52 in accordance with the foregoing description.

Returning to fig. 27A-28, the second end section 712 is optionally configured for assembly to a reservoir other than the reservoir 52 (fig. 2), e.g., in terms of size. The second end section 712 may include a skirt 730, a flange 732, and one or more key bodies 734. Skirt 730 projects longitudinally from central ring 706 and terminates at second end surface 704. Skirt 730 may have an interrupted configuration as shown, or may be a continuous, circumferentially uninterrupted body. In any event, the inner diameter of skirt 730 is less than the inner diameter of centering ring 706. A flange 732 projects radially inward from skirt 730 adjacent to central ring 706. Flange 732 may have an intermittent configuration as shown, or may be a continuous, circumferentially uninterrupted body. Key bodies 734 each project radially inward from skirt 730 along flange 732. In some embodiments, four of the key bodies 734 are provided and are equally spaced about the circumference of the flange 732. Any other number and spatial arrangement is also acceptable. Regardless, the geometric features of the second end section 710 (e.g., the size and/or shape of the skirt 730, the flange 732, and/or the key body 734) may be configured to facilitate a secure interface with corresponding features of the reservoir.

For example, fig. 30A illustrates a shaker core 700 with respect to a reservoir 52' in accordance with the principles of the present disclosure. The reservoir 52' may be similar in height to the reservoir 52 (fig. 2) described above, but reduced in size. Thus, the reservoir 52 ' includes a cap 62 ' having a collar 68 '. Consistent with the previous explanation, collar 68 ' includes tabs 144 ' and forms recesses 158 '. An external rib 168 'is optionally provided on each of the tabs 144'. With these explanations in mind, the second end section 712 of the shaker core 700 is configured to interface with the cover 62 'of the reservoir 52'. The inner diameter of the skirt 730 is selected to be approximately (e.g., equal to or slightly larger than) the maximum outer diameter of the collar 68 '(e.g., the diameter collectively defined by the tab ribs 168'). With this configuration, the second end section 712 can be placed over the cap 62 ', with the inner surface of the skirt 730 abutting the rib 168 ' or immediately adjacent the rib 168 '. Key body 734 can be sized, shaped, and circumferentially positioned according to the size, shape, and location of collar recess 158'. Accordingly, assembly of the second end section 712 onto the cover 62 'includes nesting each of the key bodies 734 within a corresponding one of the notches 158' in a manner similar to that previously described. When so arranged, the flange 732 abuts the collar 68 'and rotational movement of the shaker core 700 relative to the collar 68' (and vice versa) is significantly restricted. The height or longitudinal dimension of the shaker core 700 from the flange 732 to the first end surface 702 is selected to be greater than the height or longitudinal dimension of the cover 62 ' from the collar 68 ' to the spout 72 '. With this configuration, and as reflected by fig. 30B, when the second end segment 712 is connected or mounted to the closure 62 'as described above, the first end surface 702 longitudinally passes beyond the spout 72' in preparation for engagement with a shaker machine gripping device (not shown). Although not shown, a plug 600 (fig. 25A) may optionally be provided and sealed to the spout 72'.

In addition to having smaller external dimensions than the reservoir 52 (fig. 2), the reservoir 52' is also compatible with other reservoir system components of the present disclosure, in addition to the plug 600 and the shaker core 700. For example, reservoir 52' may incorporate the same first connection format 74 as described above, facilitating coupling with adapter 54 as shown in fig. 31A and/or adapter 500 as shown in fig. 31B.

Any of the complementary connection formats described in this disclosure may be integrally formed with the remainder of the corresponding closure. Alternatively, these components may be initially formed as separate modular parts or assemblies comprising connection geometries to allow connection to the remainder of the closure, for example as described in WO 2017/123709, the entire teachings of which are incorporated herein by reference.

The spray gun reservoir system of the present disclosure provides a significant improvement over previous designs. A user can easily and conveniently achieve a secure, sealed connection between the reservoir and the fitting components of the system in a highly intuitive manner. Other optional system components are compatible with one another and facilitate use and storage of the reservoir in a desired manner.

Although the present disclosure has been described with reference to preferred embodiments, workers skilled in the art will recognize that changes may be made in form and detail without departing from the spirit and scope of the disclosure.

Claims (39)

1. A closure for a spray gun reservoir system comprising:

a closure body, the closure body comprising:

a nozzle;

a platform at least partially surrounding the spout, wherein the platform defines a main plane and a partial helical shape that is inclined relative to the main plane and rotates about a central axis of the spout; and

a wall comprising an outer face adjoining the platform and comprising an inclined portion that is inclined relative to the major plane of the platform;

wherein the partial helical shape begins at the major plane and interrupts the inclined portion of the outer face of the wall;

wherein the platform defines a ramp surface having a first ramp segment extending from a first end to a second end, the first end being longitudinally above the second end relative to an upright orientation of the lid; and

wherein the first ramp segment projects into the outer face;

the platform includes at least one region that serves as an uppermost surface of the platform and is substantially flat.

2. The closure of claim 1, wherein the sloped portion of the outer face of the wall comprises a dome shape.

3. The closure of claim 1, wherein the sloped portion of the outer face of the wall comprises a tapered shape.

4. The closure in accordance with claim 1 in which a first end of said partial spiral shape is proximate a transition zone of said major plane and a second end of said partial spiral shape interrupts said sloped portion of said outer face of said wall.

5. The closure of claim 4, wherein the second end of the partial helical shape terminates in a retention feature.

6. The closure of claim 1, further comprising a collar rotatably connected to the closure body.

7. The closure as claimed in claim 6, wherein the collar comprises a closure connector structure configured to connect the closure to a compatible cup receptacle.

8. A closure for a spray gun reservoir system comprising:

a closure body comprising a spout and a platform at least partially surrounding the spout, wherein at least a portion of the platform forms a partial helical shape that rotates about a central axis of the spout, an

A collar rotatably connected to the closure body,

wherein the collar comprises a closure connector structure configured to connect the closure to a compatible cup receptacle;

wherein the platform defines a major plane and the partial helical shape is inclined relative to the major plane, wherein the closure body comprises a wall comprising an outer face that adjoins the platform and comprises an inclined portion that is inclined relative to the major plane of the platform, wherein the partial helical shape interrupts the inclined portion of the outer face of the wall.

9. The closure of claim 8, wherein the sloped portion of the outer face of the wall comprises a dome shape.

10. The closure of claim 8, wherein the sloped portion of the outer face of the wall comprises a tapered shape.

11. The closure in accordance with claim 8 in which a first end of said partial spiral shape is proximate a transition zone of said major plane and a second end of said partial spiral shape interrupts said sloped portion of said outer face of said wall.

12. The closure of claim 11, wherein the second end of the partial helical shape terminates in a retention feature.

13. A reservoir system for use with a spray gun, the system comprising:

a cup receptacle; and

a closure, the closure comprising:

a closure body providing a spout and a platform surrounding the spout, wherein at least a portion of the platform forms a partial helical shape that rotates about a central axis of the spout, an

A collar rotatably connected to the closure body,

wherein the collar comprises a lid connector structure configured to connect the lid to the cup receptacle;

wherein the platform defines a ramp surface having a first ramp segment extending from a first end to a second end, the first end being longitudinally above the second end relative to an upright orientation of the lid; and

wherein the first ramp segment projects into an outer face of a wall of the closure body.

14. The reservoir system of claim 13, wherein the cup receptacle comprises a cylindrical sidewall extending from a base end to an open end and defining an internal cavity, wherein an aperture is defined in the sidewall leading to the internal cavity for viewing contents of the internal cavity from outside the cup receptacle, wherein the aperture has a non-uniform circumferential width.

15. The reservoir system of claim 14, wherein the aperture extends from a first side proximate the base end to an opposite second side proximate the open end, wherein a circumferential width of the aperture at the first side is greater than a circumferential width of the aperture at the second side.

16. The reservoir system of claim 13, wherein the closure body includes an outer face defining a continuous dome shape, wherein a segment of the ramp surface protrudes into the dome shape of the outer face.

17. The reservoir system of claim 16, wherein the ramp surface further comprises a second ramp segment extending from a first end to a second end, the first end of the second ramp segment being adjacent to and longitudinally above the second end of the first ramp segment, wherein the closure body forms an undercut at the intersection of the first and second ramp segments, the undercut protruding into the domed shape of the outer face.

18. The reservoir system of claim 16, wherein a radial width of the first ramp segment at the first end is less than a radial width of the first ramp segment at the second end.

19. The reservoir system of claim 13, wherein the collar comprises a ring and a plurality of tabs projecting from an underside of the ring, a portion of the closure connector structure being carried by at least one of the tabs, wherein the ring has a variable radial width.

20. The reservoir system of claim 19, wherein circumferentially adjacent ones of the tabs are separated by a circumferential opening, wherein a radial width of the ring decreases at a location that is longitudinally aligned with at least one of the circumferential openings.

21. The reservoir system of claim 19, wherein the ring defines at least one slot aligned with a corresponding one of the tabs.

22. The reservoir system of claim 13, further comprising an adapter configured to selectively connect the spout with a spray gun inlet.

23. The reservoir system of claim 22, wherein the lid and the adapter include complementary connector features for selectively mounting the adapter to the lid.

24. The reservoir system of claim 22, wherein the adapter comprises a tubular member and a base projecting from the tubular member, wherein the tubular member terminates at one end and the base defines a tracking surface opposite the one end, wherein at least a portion of the tracking surface forms a partial helical shape corresponding to the partial helical shape of the platform.

25. The reservoir system of claim 24, wherein the adapter further comprises at least one locking structure protruding from an exterior face of the base.

26. The reservoir system of claim 25, wherein the at least one locking structure extends from a first end to an opposing second end and defines an abutment face, an upper face opposing the abutment face, and a guide surface opposing the base, wherein a geometry of the abutment face in a direction of extension from the first end to the second end is different than a geometry of the upper face in a direction of extension from the first end to the second end.

27. The reservoir system of claim 26, wherein the upper face defines an insertion section extending from the first end and a locking section extending from the insertion section in the direction of the second end, wherein a major plane defined by the insertion section is not coplanar with a major plane defined by the locking section.

28. The reservoir system of claim 27, wherein the upper face further defines a tail section extending from the locking section in the direction of the second end, wherein a major plane defined by the tail section is not coplanar with the major plane defined by the locking section.

29. The reservoir system of claim 28, wherein the shape of the tail section is a partial helical shape.

30. The reservoir system of claim 26, wherein the guide surface defines a first region extending from the first end and a second region extending from the first region in a direction of the second end, wherein the first region defines a uniform radius relative to a centerline of the tubular member, wherein the second region defines a tapered radius relative to the centerline in the direction of extension from the first region toward the second end.

31. The reservoir system of claim 25, wherein the cap further comprises at least one retaining structure configured to engage the at least one locking structure when the adapter is rotated relative to the cap.

32. The reservoir system of claim 13, further comprising a stopper for selectively sealing the spout, the stopper comprising a stopper body and a lip, wherein the stopper body defines a closed end opposite a forward end, wherein the lip projects radially from the forward end, wherein the lip defines a plurality of gripping tabs.

33. The reservoir system of claim 32, wherein the plurality of grip tabs are equally spaced from one another.

34. The reservoir system of claim 32, wherein the plurality of grip tabs comprises exactly three grip tabs.

35. The reservoir system of claim 32, wherein the plug body defines a stepped outer diameter in a direction of extension from the closed end to the leading end.

36. The reservoir system of claim 13, further comprising a shaker core configured for selective mounting to the cover, the shaker core having a longitudinal length such that, when mounted to the collar, the shaker core extends beyond the spout.

37. The reservoir system of claim 36, wherein the shaker core defines opposing first and second ends, wherein an inner diameter of the shaker core at the first end is greater than an inner diameter of the shaker core at the second end.

38. The reservoir system of claim 37, wherein the shaker core further comprises an annular shoulder projecting radially inward from a hub adjacent the first end, the annular shoulder defining a flange for abutting a corresponding surface of the collar.

39. The reservoir system of claim 38, wherein the shaker core further comprises at least one key body protruding from the flange in the direction of the first end, wherein the at least one key body is configured to be received within a corresponding recess defined by the collar.

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