Wide-mouthed fluid connector for hand-held spray gun

Abstract

The invention discloses a spray gun reservoir connector system. The system includes a reservoir closure, a lance inlet, and complementary first and second connector forms. The first connector form and the second connector form are provided with one of the cap or the lance inlet. The first connector form includes a plurality of retention structures each defining a capture area. The retaining structures are collectively arranged in a circular pattern. The second connector form includes a plurality of locking structures that each include a shim body configured to selectively interface with the capture region. The connector form is configured to provide a wedge-shaped engagement between a corresponding one of the locking structure and the retaining structure upon rotation of the lance inlet relative to the cap. The cap may include a spout. The retention structure and the locking structure are radially spaced outside the spout, and the spout may have an inner diameter of not less than 22 mm.

Description

[0001] This application is a divisional application of the patent application with national application number 201780006813.3, invention name “Wide-mouth fluid connector for handheld spray gun”, and entry date into the Chinese national phase on July 13, 2018. Background Art

[0002] The present disclosure relates to liquid spraying devices, such as spray guns. More particularly, it relates to the connection between the spray gun and a reservoir containing the liquid to be sprayed.

[0003] Spray guns are widely used in auto body shops to repaint repaired vehicles after accidents. In known spray guns, the liquid is contained in a reservoir attached to the gun, from which it is fed to a nozzle. Upon emerging from the nozzle, the liquid is atomized and forms a spray with the compressed air supplied to the nozzle. The liquid can be gravity-fed or suction-fed, or more recently, pressure-fed from a compressed air line to the gun through an exhaust line, or from the gun itself. Summary of the Invention

[0004] Traditionally, liquids are contained in a rigid reservoir or canister that is removably mounted on the spray gun. This allows the canister to be removed for cleaning or replacement. Previously, the canister was attached to the spray gun in its empty state and fitted with a removable cap that allowed the canister to be filled with the desired liquid while attached to the spray gun. After spraying, the canister could be removed and the spray gun and canister cleaned for reuse.

[0005] Recently, reservoir components have been developed that allow painters to mix less paint and significantly reduce the amount of time a technician needs to clean the spray gun. PPS available from 3M Company of St. Paul, MN TM Paint preparation systems provide a reservoir that eliminates the need for traditional mixing cups and paint strainers. PPS TM The paint preparation system reservoir comprises a reusable outer container or cup, an open-top liner, and a cap. The liner is a tight fit within the outer container, and the paint (or other liquid) to be sprayed is contained within the liner. The cap is assembled to the liner and provides a spout or conduit through which the contained paint is delivered. During use, the liner collapses as the paint is drawn out, and after spraying, the liner and cap can be removed, allowing a new, clean liner and cap to be used for the next use of the spray gun. Consequently, 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.

[0006] Regardless of the exact form, the reservoir or tank 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 to be in tandem, providing a complementary connection that facilitates direct assembly of the reservoir to the spray gun. In other cases, an adapter is used between the reservoir and the spray gun. The adapter has a first connection at one end that is compatible with the spray gun inlet and a second connection at the opposite end that is compatible with the reservoir outlet. Using either method, the releasable connection between the spray gun and the reservoir is conventionally achieved via a standard screw threaded connection. Other connection forms have also been proposed, such as a releasable quick-fit connection using a bayonet-type structure that can be engaged with a push-and-twist action, requiring less than one complete rotation of the reservoir to connect / disconnect the reservoir, as described, for example, in U.S. Patent Application Publication No. 2013 / 0221130, the entire teachings of which are incorporated herein by reference. To minimize the possibility of accidental release of the reservoir or a weakening of the fluid-tight seal between the reservoir and the spray gun, it has been further proposed to incorporate a safety clamp into a complementary connection form such as that described in U.S. Patent No. 7,083,119, the entire teachings of which are incorporated herein by reference. Although these and other connection forms have greatly improved the convenience and reliability of the removable connection between the reservoir and the spray gun, there is still opportunity for improvement.

[0007] The inventors of the present disclosure recognized a need to overcome one or more of the problems set forth above.

[0008] Some aspects of the present disclosure relate to a spray gun reservoir connector system. The system includes a reservoir, a spray gun inlet, a first connector form, and a second connector form. The reservoir includes a cover. The first connector form is provided with one of the cover and the spray gun inlet; the second connector form is provided with the other of the cover and the spray gun inlet. The first connector form includes a plurality of retaining structures, each of which defines a capture area. The retaining structures are arranged together in a circular pattern and circumferentially spaced from each other. The second connector form includes a plurality of locking structures, each of which includes a gasket body configured to selectively engage the capture area of ​​a corresponding one of the retaining structures. The locking structures are arranged together in a circular pattern and circumferentially spaced from each other. The connector form is configured to provide a wedge-shaped engagement between the locking structure and the corresponding one of the retaining structures when the spray gun inlet is rotated relative to the cover. In some embodiments, the cover also includes a liquid outlet or spout, and the corresponding retaining structures or locking structures are radially spaced outside the spout. In some non-limiting embodiments, the spout may optionally have an inner diameter of not less than 22 mm.

[0009] The connector system of the present disclosure facilitates simple and quick installation of the reservoir to (and removal from) the spray gun (either directly to the spray gun or to the adapter, which is then installed to the spray gun). The complementary connector forms are aligned and then rotated relative to each other to achieve a locked, liquid-tight connection (it should be understood that in some embodiments, the liquid seal can also be achieved before rotation). The larger diameter nozzle configuration provided according to some embodiments of the present disclosure promotes easier cleaning (due to the larger diameter opening and the relatively smooth interior of the adapter chamber).

[0010] As used herein, the term "liquid" refers to all materials in flowable form that are 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, primer putties, lacquers, varnishes and paint-like materials, as well as other materials such as adhesives, sealants, fillers, putties, powder coatings, blasting powders, abrasive slurries, release agents and casting dressings, which may be applied in atomized or non-atomized form depending on the properties and / or intended application of the material, and the term "liquid" is to be interpreted accordingly.

[0011] The present invention includes, but is not limited to, the following exemplary embodiments:

[0012] 1. A spray gun reservoir connector system comprising:

[0013] a reservoir comprising a closure;

[0014] spray gun inlet;

[0015] a first connector form provided with one of a closure and a spray gun inlet, the first connector form comprising a plurality of retaining structures each defining a capture area, wherein the retaining structures are collectively arranged in a circular pattern and circumferentially spaced from one another;

[0016] as well as

[0017] a second connector form provided with the other of the cover and the spray gun inlet, the second connector form comprising a plurality of locking structures, the plurality of locking structures each comprising a gasket body configured to selectively interface with a capture area of ​​a corresponding one of the retaining structures, wherein the locking structures are collectively arranged in a circular pattern and circumferentially spaced from one another;

[0018] Wherein the connector form is configured to provide a wedge engagement between corresponding ones of the locking structure and the retaining structure when the spray gun inlet is rotated relative to the cover.

[0019] 2. The connector system of embodiment 1, wherein the closure further comprises a liquid outlet having a spout, and further wherein the connector form associated with the closure is radially spaced outside of the spout.

[0020] 3. A connector system according to embodiment 2, wherein the nozzle has an inner diameter of not less than 22 mm.

[0021] 4. The connector system of any one of embodiments 1-3, wherein the first connector form is provided with a closure and the second connector form is provided with a spray gun inlet.

[0022] 5. The connector system of embodiment 4, wherein the cover further comprises a liquid outlet, and further wherein the retaining structure is disposed about the liquid outlet and radially spaced from the liquid outlet.

[0023] 6. The connector system of any one of embodiments 1-3, wherein the second connector form is provided with a closure and the first connector form is provided with a spray gun inlet.

[0024] 7. The connector system of embodiment 6, wherein the cover further comprises a liquid outlet, and further wherein the locking structure is arranged around the liquid outlet and radially spaced from the liquid outlet.

[0025] 8. The connector system of any one of embodiments 1-7, wherein the spray gun inlet is on an adapter adapted to connect to the spray gun.

[0026] 9. The connector system of embodiment 8, wherein the adapter further comprises a connector feature and a tubular member configured for connection to the spray gun inlet port.

[0027] 10. The connector system of any one of embodiments 1-7, wherein the spray gun inlet is integral with the spray gun.

[0028] 11. A connector system according to any one of embodiments 1-10, wherein the retaining structures each include a wedge-shaped body and a contact surface defining a mating surface, and further, wherein the mating surface is longitudinally spaced from the contact surface, and even further, wherein the contact surface and the mating surface combine to define at least a portion of the corresponding capture area.

[0029] 12. The connector system of embodiment 11, wherein at least one of the engagement surface and the contact surface defines a plane that is arranged at an angle to a plane that is perpendicular to the rotational axis of the system.

[0030] 13. The connector system of any one of embodiments 1-12, wherein the first connector form further comprises a platform defining a contact surface, and further wherein the retaining structure protrudes longitudinally away from the contact surface.

[0031] 14. The connector system of embodiment 13, wherein the contact surface defines a circle.

[0032] 15. The connector system of any one of embodiments 13-14, wherein at least a portion of the contact surface is substantially planar.

[0033] 16. The connector system of any one of embodiments 13-15, wherein the platform defines a plurality of undercuts in the contact surface.

[0034] 17. The connector system of any one of embodiments 1-16, wherein each of the locking structures further comprises a stop body extending from the corresponding gasket body.

[0035] 18. A connector system according to any one of embodiments 1-17, wherein the gasket body of each locking structure in the locking structure defines an adjacent surface opposite to the locking surface, and further, wherein at least one of the adjacent surface and the locking surface defines a plane arranged at an angle to a plane perpendicular to the rotation axis of the system.

[0036] 19. A spray gun reservoir assembly comprising:

[0037] a liquid outlet, the liquid outlet comprising a spout;

[0038] A first connector form, the first connector form being radially spaced outside of the spout, the first connector form comprising:

[0039] A surface rotated around the nozzle in the rotation direction includes a first section extending circumferentially to the second undercut portion in the rotation direction along the first flat segment and the first ramp segment.

[0040] 20. The spray gun reservoir component of embodiment 19, wherein the first ramp segment comprises a partial helical shape.

[0041] 21. The spray gun reservoir component of any one of embodiments 19-20, wherein the first ramp segment tapers longitudinally downward from the first flat segment to the second undercut.

[0042] 22. The spray gun reservoir component of any one of embodiments 19-21, wherein the first section extends circumferentially from the first undercut to the second undercut.

[0043] 23. The spray gun reservoir component of embodiment 22, wherein the face comprises a second section,

[0044] The second section extends circumferentially in the rotational direction from the second undercut to the first undercut.

[0045] 24. The spray gun reservoir component of embodiment 23, wherein the second section of the face extends circumferentially to the first undercut in a rotational direction along the second flat segment and the second ramped segment.

[0046] 25. The spray gun reservoir component of embodiment 24, wherein the second ramp segment comprises a partial spiral shape.

[0047] 26. The spray gun reservoir component of any one of embodiments 24-25, wherein the second ramp segment tapers longitudinally downward from the second flat segment to the first undercut.

[0048] 27. The spray gun reservoir component of any one of embodiments 19-26, wherein the second undercut comprises a shoulder.

[0049] 28. The spray gun reservoir component of any one of embodiments 22-27, wherein the first undercut comprises a shoulder.

[0050] 29. The spray gun reservoir component of any one of embodiments 19-28, further comprising a first retaining structure corresponding to the first section of the face.

[0051] 30. The spray gun reservoir component of embodiment 29, wherein the first retaining structure is positioned at a transition from the first flat segment to the first sloped segment.

[0052] 31. The spray gun reservoir component of any one of embodiments 29-30, wherein the first retaining structure is located at a circumferential midpoint of the first section.

[0053] 32. The spray gun reservoir component of any one of embodiments 29-31, wherein the first retaining structure is located at a circumferential midpoint between the second undercut and the first undercut.

[0054] 33. The spray gun reservoir component of any one of embodiments 29-32, wherein the first retaining structure defines a first capture area.

[0055] 34. The spray gun reservoir component of embodiment 33, wherein the first capture region comprises a vertically downward component extending between the first end of the first retaining structure and the second end of the first retaining structure.

[0056] 35. The spray gun reservoir component of embodiment 34, wherein the first capture region comprises a segment of a spiral that rotates about the nozzle in the direction of rotation.

[0057] 36. The spray gun reservoir component of any one of embodiments 23-35, further comprising a second retaining structure corresponding to the second section of the face.

[0058] 37. The spray gun reservoir component of embodiment 36, wherein the second retaining structure is positioned at a transition from the second flat segment to the second sloped segment.

[0059] 38. The spray gun reservoir component of any one of embodiments 36-37, wherein the second retaining structure is located at a circumferential midpoint of the second section.

[0060] 39. The spray gun reservoir component of any one of embodiments 36-38, wherein the second retaining structure is located at a circumferential midpoint between the first undercut and the second undercut.

[0061] 40. The spray gun reservoir component of any one of embodiments 36-39, wherein the second retaining structure defines a second capture area.

[0062] 41. The spray gun reservoir component of embodiment 40, wherein the second capture region comprises a vertically downward component extending between the first end of the second retaining structure and the second end of the second retaining structure.

[0063] 42. The spray gun reservoir component of embodiment 41, wherein the second capture region comprises a segment of a spiral that rotates about the nozzle in the direction of rotation.

[0064] 43. The spray gun reservoir component of any one of embodiments 19-42, wherein the first connector form comprises a platform, wherein the platform comprises a face.

[0065] 44. The spray gun reservoir component of any one of embodiments 19-43, wherein the nozzle has an inner diameter of not less than 22 mm.

[0066] 45. The spray gun reservoir component of any one of embodiments 36-44, wherein the first

[0067] The retaining structure and the second retaining structure are disposed about the spout and are radially spaced from the spout.

[0068] 46. ​​The spray gun reservoir component of any one of embodiments 36-45, wherein the first retaining structure and the second retaining structure each comprise a wedge-shaped body and a contact surface defining an engagement surface, and further, wherein the engagement surface is longitudinally spaced from the contact surface, and the contact surface and the engagement surface combine to define at least a portion of the corresponding capture area.

[0069] 47. The spray gun reservoir component of embodiment 46, wherein at least one of the contact surface and the engagement surface defines a plane that is arranged at an angle to a plane that is perpendicular to the axis of rotation of the system.

[0070] 48. The spray gun reservoir component of any one of embodiments 43-47, wherein the platform defines a contact surface, and further wherein the first retaining structure and the second retaining structure protrude longitudinally away from the contact surface.

[0071] 49. The spray gun reservoir component of embodiment 48, wherein the contact surface defines a circle.

[0072] 50. The spray gun reservoir component of any one of embodiments 48-49, wherein at least a portion of the contact surface is substantially planar.

[0073] 51. The spray gun reservoir component of any one of embodiments 19-50, wherein the spray gun reservoir component is a closure for a spray gun reservoir.

[0074] 52. The spray gun reservoir component of any one of embodiments 19-51, wherein the spray gun reservoir component is a canister. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 is a simplified perspective view of a spray gun assembly including a spray gun and a reservoir;

[0076] Figure 2 is an exploded view of a reservoir incorporating a connected form according to the principles of the present disclosure;

[0077] Figure 3 is a perspective view of a portion of a spray gun reservoir connector system according to the principles of the present disclosure and including a complementary connection form;

[0078] Figure 4A yes Figure 3 A perspective view of a cover portion of a connector;

[0079] Figure 4B yes Figure 4A A top view of the cover;

[0080] Figure 4C yes Figure 4A a side view of the cover;

[0081] Figure 4D yes Figure 4A A longitudinal sectional view of the cover;

[0082] Figure 4E yes Figure 4A an enlarged cross-sectional view of a portion of the cover;

[0083] Figure 4F From different cross-sectional planes Figure 4E an enlarged cross-sectional view of a portion;

[0084] Figure 5A is a connector system that can be used with the present disclosure and includes Figure 4A A perspective view of an adapter having a complementary connection form to a connection form of the cover;

[0085] Figure 5B yes Figure 5A Top view of the adapter;

[0086] Figure 5C yes Figure 5A Front view of the adapter;

[0087] Figure 5D yes Figure 5A A side view of the adapter;

[0088] Figure 5E yes Figure 5A A longitudinal cross-sectional view of the adapter;

[0089] Figures 6 to 9C Show Figure 3 The components of the connector system include Figure 4A The capping and Figure 5A adapter connection;

[0090] Figure 10 is an exploded perspective view of another spray gun reservoir connector system according to the principles of the present disclosure and incorporated into a reservoir cap and adapter;

[0091] Figure 11 yes Figure 10 an enlarged side view of a portion of the cover;

[0092] Figure 12 It is the final assembly Figure 10 A simplified cross-sectional view of a portion of the cover and adapter;

[0093] Figure 13 is an exploded perspective view of another spray gun reservoir connector system according to the principles of the present disclosure and incorporated into a reservoir cap and adapter;

[0094] Figure 14A yes Figure 13 a perspective view of the cover;

[0095] Figure 14B yes Figure 14A A front view of the cover;

[0096] Figure 14C yes Figure 14A a side view of the cover;

[0097] Figure 14D yes Figure 14A A top view of the cover;

[0098] Figure 14E yes Figure 14A an enlarged cross-sectional view of a portion of the cover;

[0099] Figure 15A yes Figure 13 A perspective view of the adapter;

[0100] Figure 15B yes Figure 15A A side view of the adapter;

[0101] Figure 15C yes Figure 15A Front view of the adapter;

[0102] Figure 15D yes Figure 15A A cross-sectional view of an adapter;

[0103] 16A to 17C Show that Figure 14A The capping and Figure 15A adapter connection;

[0104] Figure 18A is a perspective view of another closure according to the principles of the present invention;

[0105] Figure 18B yes Figure 18A a side view of the cover;

[0106] Figure 18C yes Figure 18A A top view of the cover;

[0107] Figure 18D yes Figure 18A a cross-sectional view of the cover; and

[0108] Figure 19 is an exploded perspective view of a modular cover assembly incorporating a connection form according to the principles of the present disclosure. DETAILED DESCRIPTION

[0109] Aspects of the present disclosure relate to a connection system that facilitates a releasable, sealed connection between a spray gun and a reservoir. As background, Figure 1 A spray gun paint system 20 is shown that includes a gravity feed type spray gun 30 and a reservoir 32. The spray gun 30 includes a body 40, a handle 42, and a nozzle 44 at the front end of the body 40. The spray gun 30 is manually operated by a trigger 46 that is pivotally mounted on the side of the body 40. An inlet port 48 (generally referred to as an inlet port) is formed in or carried by the body 40 and is configured to establish a fluid connection between the spray gun 30 and the internal spray conduit (concealed) of the reservoir 32. The reservoir 32 contains the liquid to be sprayed (e.g., paint) and is connected to the inlet port 48 (it should be understood that the inlet port 48 is a liquid that is not sprayed). Figure 1(The connections implied by the drawings do not necessarily reflect the connections disclosed herein.) In use, the spray gun 30 is connected to a compressed air source (not shown) via a connector 49 at the lower end of the handle 42. When the user pulls the trigger 46, compressed air is delivered through the spray gun 30, and paint is delivered from the reservoir 32 to the nozzle 44 through the spray gun 30 under gravity. As a result, the paint (or other liquid) is atomized upon exiting the nozzle 44 to form a spray with the compressed air exiting the nozzle 44.

[0110] For ease of illustration, the disclosed connection between the spray gun 30 and the reservoir 32 is not included in the drawings. Figure 1 In general, the reservoir 32 includes one or more components that establish a first connection for connection to the spray gun 30. A complementary second connection includes an adapter (not shown) between the reservoir 32 and the inlet port 48 or assembled with the spray gun 30. With this background in mind, Figure 2 A non-limiting example of a reservoir 50 according to the principles of the present disclosure is shown. The reservoir 50 includes an outer container 52 and a lid 54. The lid 54 includes or provides a first connection form or feature 56 (generally referred to as "later described in more detail below"). The remaining components of the reservoir 50 can take various forms and are optional. For example, in some embodiments, the reservoir 50 also includes a liner 58 and a collar 60. Generally speaking, the liner 58 corresponds to the shape of the interior of the container 52 (and is a tight fit in the interior of the container 52) and can have a narrow rim 62 at the open end on the top edge of the container 52. The lid 54 is configured to push fit in the open end of the liner 58 to position the peripheral edge of the lid 54 on the rim 62 of the liner 58. The lid / liner assembly is fixed in place by an annular collar 60 that releasably engages the container 52 (e.g., a threaded interface, snap fit, etc. as shown).

[0111] In addition to the connection form 56, the cover 54 forms a liquid outlet 64 (generally referred to as liquid outlet 64) through which the liquid contained in the liner 58 can flow. In use, as paint is drawn from the reservoir 50, the liner 58 collapses in an axial direction toward the cover 54. Optional vent holes 66 in the base of the outer container 52 allow air to enter when the liner 58 collapses. When spraying is complete, the reservoir 50 can be connected to the spray gun 30 ( Figure 1 ) is separated, the collar 60 is released and the closure / liner assembly is removed integrally from the outer container 52. The outer container 52 and collar 60 remain clean and ready for reuse with a new liner 58 and closure 54. In this way, excessive cleaning of the reservoir 50 can be avoided.

[0112] In other embodiments, the reservoir of the present disclosure need not include the liner 58 and / or the collar 60. The disclosed connection configurations may be implemented with a wide variety of other reservoir configurations that may or may not be directly implied by the drawings.

[0113] As described above, the first connection form 56 provided with the closure 54 is configured to releasably connect with a complementary second connection form provided with the spray gun inlet or device. As a reference point, Figure 3 The cover 54 is shown with a portion of a spray gun inlet 70 that otherwise carries or provides a second complementary connection form 72 (referenced generally). The spray gun inlet 70 may be an adapter, a spray gun 30 ( Figure 1 ), etc. Regardless, the first connection form 56 and the second connection form 72 are configured in tandem to facilitate installation or connection of a releasable, liquid-tight seal between the closure 54 and the spray gun inlet 70. In some embodiments, the first complementary connection form 56 and the second complementary connection form 72 can be considered to collectively define a spray gun reservoir connector system 74 in accordance with the principles of the present disclosure.

[0114] Now refer to Figures 4A to 4D The first connection form 56 is described, which otherwise shows the cover 54 in isolation. The shape of the cover 54 can be considered to define a longitudinal axis A. In addition to the first connection form 56 and the fluid outlet 64, the cover 54 also includes or defines a wall 80, a flange 82, and a hub 84. The wall 80 defines an opposing inner face 86 and an outer face 88, wherein at least the outer face 88 of the wall 80 has a curved (e.g., hemispherical) shape, such as (but not limited to) the shape implied by the accompanying drawings. Finally, the wall 80 defines a central opening 90 (at Figure 4D A flange 82 projects radially outwardly from the periphery of the wall 80 opposite the central opening 90 and is configured to engage with the reservoir 50 ( Figure 2 ) of one or more other components, such as the outer container 52 ( Figure 2 The hub 84 projects longitudinally (relative to the longitudinal axis A) from the flange 82 in a direction opposite the wall 80 and may be configured to interface with one or more other components of the reservoir 50, such as the liner 58 ( Figure 2 ). Wall 80, flange 82 and hub 84 can take many other forms. In addition, in other embodiments, one or both of flange 82 and hub 84 can be omitted.

[0115] The liquid outlet 64 includes a spout 100. The spout 100 is coaxial with the longitudinal axis A and projects upwardly from the wall 80 (relative to the Figure 4A The nozzle 100 defines a passage 104 aligned with and leading to the central opening 90 (at Figure 4DWith this configuration, liquid flow through fluid outlet 64 (eg, from a location within interior face 86 of wall 80 to a location outside of spout 100 ) readily occurs through central opening 90 and passageway 104 .

[0116] In some embodiments, the fluid outlet 64 includes one or more additional features that may optionally be considered components of the first connection form 56. For example, the leading surface 102 may be configured to mate with a complementary component or device (e.g., Figure 3 The sealing relationship can be established by the leading surface 102 being substantially flat or planar (i.e., within 5% of a truly flat or planar shape) in a plane perpendicular to the longitudinal axis A. In addition, one or more annular ribs 106 can be formed along the exterior of the nozzle 100 adjacent the leading surface 102 and configured to form an annular seal with the spray gun inlet 70 when assembled to the closure 54. A variety of other configurations can alternatively be used to promote the (one or more) liquid-tight seals between the closure 54 and the spray gun inlet 70, which may or may not include one or both of the leading surface 102 and the annular rib(s) 106.

[0117] The first connection form 56 includes a platform 110 and a plurality of retaining structures 112. The platform 110 and retaining structures 112 protrude from the exterior face 88 of the wall 80 at a location external to the spout 100 and are configured to facilitate engagement with the second complementary connection form 72 ( Figure 3 )Optional connection or installation as described below.

[0118] The platform 110 extends from the exterior face 88 and terminates at a contact surface 120. The contact surface 120 is configured to provide a sliding interface with the lance inlet (not shown) and may have a shape that is different from the optional curved shape of the wall 80. In some embodiments, the contact surface 120 is substantially flat or planar (i.e., within 5% of a truly flat or planar shape) in a plane perpendicular to the longitudinal axis A. The contact surface 120 circumferentially surrounds the nozzle 100 and is sized and shaped to correspond to the position of the retaining structure 112. For example, and as Figure 4A As best reflected, the contact surface 120 can have an enlarged radial width in the area of ​​each of the retaining structures 112. In other embodiments, the contact surface 120 can have a more uniform radial width.

[0119] In some embodiments, the retaining structures 112 can be identical. Each of the retaining structures 112 defines an opposing first end 124 and a second end 126 and includes a support body 130 and a wedge-shaped body 132. The support body 130 is radially spaced from the nozzle 100 and projects upwardly from the wall 80. One or more reinforcing ribs 133 are optionally provided between the support body 130 and the wall 80 for minimizing deflection of the support body 130 away from the nozzle 100 during use. The wedge-shaped body 132 projects radially inwardly from the support body 130 opposite the wall 80. A capture area 134 is defined by the contact surface 120, the support body 130, and the wedge-shaped body 132 for receiving the spray gun inlet 70 ( Figure 3 )’s corresponding feature structure.

[0120] More specifically, and as Figure 4E As best shown in FIG. 1 , the projection of the support body 130 defines a guide surface 136. The guide surface 136 faces the nozzle 100 and is radially spaced apart from the exterior of the nozzle 100 by a radial spacing R. The wedge-shaped body 132 projects radially inwardly relative to the guide surface 136 and defines an engagement surface 138 and an alignment surface 140. The engagement surface 138 faces the contact surface 120 and is longitudinally spaced apart from the contact surface 120 by a longitudinal spacing L. The contact surface 120, the guide surface 136, and the engagement surface 138 combine to define the capture area 134. The alignment surface 140 faces the nozzle 100 and is radially spaced apart from the exterior of the nozzle 100 by a radial spacing G. The size of the radial spacing R and the size of the radial spacing G are consistent with the size of the gun inlet 70 ( FIG. 1 ). Figure 3 ) corresponds to the geometrical characteristic structure. In this regard, and with reference to Figure 4D , guide surfaces 136 collectively define a capture diameter D1 relative to longitudinal axis A; alignment surfaces 140 collectively define a gap diameter D2. Capture diameter D2 and gap diameter D2 (or vice versa) are selected based on the geometric features of the spray gun inlet 70 to facilitate the desired coupling and decoupling operations as described below.

[0121] The geometry of the contact surface 120 and the engagement surface 138 is configured to facilitate the complementary second connection form 72 ( Figure 3 ) of the corresponding characteristic structure of the wedge-shaped joint. Figure 4F, the engagement surface 138 is substantially flat (i.e., within 5% of a truly flat shape), and the plane of the engagement surface 138 is non-parallel relative to the plane of the contact surface 120. For example, the planes of the contact surface 120 and the engagement surface 138 combine to define an angle of approximately 1 degree to 70 degrees, such as in the range of 1 degree to 30 degrees. With this construction, the longitudinal spacing L tapers from the first end 124 to the second end 126. Due to this tapered or wedge-like shape, a rigid body (provided with the second connection form 72) that is initially inserted into the capture area 134 at the first end 124 and then oriented toward the second end 126 will become frictionally wedged or engaged within the capture area 134 as described below. Also refer to Figure 4B , the retaining structures 112 are arranged such that the tapered shape of the capture region 134 of each retaining structure 112 is in the same rotational direction relative to the longitudinal axis A. For example, relative to Figure 4B orientation, the capture area 134 of each retaining structure 112 (hidden in Figure 4B ) tapers in a clockwise direction (eg, the first end 124 is rotationally "in front of" the corresponding second end 126 in a clockwise direction). Figure 4B It is also reflected that the leading end portion 124 can define a recess to further facilitate initial guidance of the body into the capture area 134. The alignment surface 140 of each retaining structure 112 can be substantially flat, generally tangential to the circumference of the spout 100, as shown; in other embodiments, the alignment surface 140 can have a generally arcuate shape following the curved portion of the spout 100.

[0122] Return to Figures 4A to 4D , retaining structure 112 and complementary second connection form 72 ( Figure 3 ) establishes a secure engagement or connection and is separated from the spout 100. Utilizing this configuration, and unlike prior art fluid connector designs utilized with paint spray guns, the disclosed connection form permits the spout 100, and therefore the fluid outlet 64, to exhibit a relatively large inner diameter. In some embodiments, the inner diameter of the spout 100 is no less than 20 mm, alternatively no less than 22 mm, and optionally approximately 30 mm. Additionally, by positioning the capture area 134 in close proximity to the wall 80, the height of the spout 100 can be reduced compared to conventional spray gun reservoir connector designs. In some non-limiting embodiments, for example, the height of the spout 100 is approximately 5 mm to 15 mm.

[0123] Although Figures 4A to 4DThe first connection form 56 is shown as including two of the retaining structures 112, but in other embodiments, three or more of the retaining structures 112 are provided. In some embodiments, the retaining structures 112 are optionally equally spaced. Regardless, open areas 150 are defined between circumferentially adjacent ones of the retaining structures 112. For example, Figure 4B A first open area 150a circumferentially between the second end 126 of the first retaining structure 112a and the first end 124 of the second retaining structure 112b and a second open area 150b circumferentially between the second end 126 of the second retaining structure 112b and the first end 124 of the first retaining structure 112a are identified.

[0124] return Figure 3 , the second connection form 72 is configured to selectively mate with the features of the first connection form 56. In some embodiments, the second connection form 72 is provided as part of an adapter, such as Figures 5A to 5E In addition to the second connection form 72 (generally in Figure 5A In addition to the adapter 180 and the second connection form 72, the adapter 180 also includes a tubular member 190. Detailed descriptions of the various components are provided below. Generally speaking, the shape of the adapter 180 defines a central axis X. The tubular member 190 may include or provide features similar to those of conventional spray gun reservoir connection adapters, such as for establishing a connection to the inlet port of the spray gun. A base 192 of the second connection form 72 protrudes from the tubular member 190 and carries or defines the other portions of the second connection form 72 and facilitates installation of the adapter 180 to the cover 54 ( Figure 3 ).

[0125] The tubular member 190 can take various forms and defines a central passage 200 ( Figure 5E(best shown in ). The passageway 200 is open at the leading end 202 of the tubular member 190. The tubular member 190 forms or provides mounting features that facilitate assembly to a conventional (e.g., threaded) spray gun inlet port. For example, external threads 204 may be provided along the tubular member 190 adjacent the leading end 202, configured to threadably interface with the threads provided by the spray gun inlet port. In this regard, the pitch, thread form, and spacing of the external threads 204 may be selected based on the specific thread pattern of the brand / model of spray gun with which the adapter 180 is intended to be used. Other spray gun mounting features are also acceptable, which may or may not include or require external threads 202. The tubular member 190 may optionally further include or define a gripping section 206. The gripping section 206 is configured to facilitate manipulation of the adapter 180 by a user using conventional tools, and in some embodiments, includes or defines a hexagonal surface pattern suitable for easy engagement with a wrench. In other embodiments, the gripping section 206 may be omitted.

[0126] The base 192 extends from the tubular member 190 opposite the leading end 202 and includes a shoulder 210 and a ring 212. Figure 5E As shown, the shoulder 210 and the ring 212 combine to define a chamber 214 that opens into the central passage 200 of the tubular member 190 and is configured to receive the closure 54 ( Figure 4A ) nozzle 100( Figure 4A ). The shoulder 210 extends radially outward from the tubular member 190 (relative to the central axis X) and defines a radial inner face 216. In some embodiments, the radial inner face 216 is substantially flat or planar (i.e., within 5% of a truly flat or planar shape) in a plane perpendicular to the central axis X, for reasons that will be clarified below. The ring 212 protrudes longitudinally from the outer periphery of the shoulder 210 in a direction opposite to the tubular member 190 and terminates at a contact face 218. In addition, the ring 212 defines a cylindrical inner face 220 and a cylindrical outer face 222. The inner diameter of the ring 212 (e.g., the diameter defined by the cylindrical inner face 220) corresponds to (e.g., is approximately or slightly larger than) the outer diameter of the nozzle 100. The outer diameter of the ring 212 can extend to the contact face 218 or can be uniform. In any case, the maximum outer diameter of the ring 212 (e.g., the maximum diameter defined by the cylindrical outer face 222) corresponds to (e.g., is approximately or slightly smaller than) the above-mentioned gap diameter D1 ( Figure 4D In some embodiments, the contact surface 21 is substantially flat or planar (ie, within 5% of a truly flat or planar shape) in a plane perpendicular to the central axis X, for reasons explained more clearly below.

[0127] In some embodiments, the radially inner face 216 and / or the cylindrical inner face 220 are aligned with the cover 54 ( Figure 4A) establishes a liquid-tight seal and, therefore, may be considered part of the second connection form 72 in accordance with the principles of the present disclosure. In other embodiments, the radially inner face 216, the cylindrical inner face 220, and / or other components of the base 192 may be considered separate from the second connection form 72. Regardless, the second connection form 72 includes a plurality of locking structures 230. The locking structures 230 project outwardly from the cylindrical outer face 222 and are sized and shaped to engage with the retaining structure 112 ( Figure 4A ) are selectively joined.

[0128] In some embodiments, the locking structures 230 are identical and each define a first end 240 that is opposite a second end 242 in a circumferential extension along the ring 212. The locking structures 230 include a washer or wedge-shaped body 250 that defines an abutment surface 252, a locking surface 254, and a guide surface 256. The abutment surface 252 protrudes from the ring 212 at or proximate to the contact surface 218. In some embodiments, the abutment surface 252 is substantially flat or planar (i.e., within 5% of a truly flat or planar shape) in a plane perpendicular to the central axis X and is flush with the contact surface 218 (e.g., the contact surface 218 and the abutment surface 252 can be coplanar).

[0129] The locking surface 254 is formed longitudinally relative to the abutment surface 252 to define a Figure 5D The height H of the gasket body 250 identified in S Additionally, the locking surface 254 generates a shape or geometry relative to the ring 212 that resembles a segment of a spiral. Figure 5D As shown, the abutment surface 252 is substantially flat (i.e., within 5% of a truly flat shape), and the plane of the locking surface 254 is non-parallel relative to the plane of the abutment surface 252. For example, the planes of the abutment surface 252 and the locking surface 254 combine to define an angle of approximately 1 degree to 70 degrees, such as within a range of 1 degree to 30 degrees. In some embodiments, the angle defined by the abutment surface 252 and the locking surface 254 is substantially flat (i.e., within 5% of a truly flat shape), and the plane of the locking surface 254 is non-parallel relative to the plane of the abutment surface 252. Figure 4F The angles defined by the retaining structure 112 are slightly different to optionally create interference between the two components during use. S The longitudinal spacing L ( L ) of the retaining structure 112 increases from the first end 240 toward the second end 242 and is clearly explained below. Figure 4F) is selected. Generally speaking, due to the extended height or wedge-like shape and corresponding dimensions, the gasket body 250 will become frictionally wedged or engaged within a corresponding one of the retaining structures 112. In some embodiments, interference is created by the interaction of the locking surface and the retaining structure, thereby causing the components to "snap" into each other to provide increased friction and retention. In such cases, the aforementioned angles may be intentionally mismatched. Continued with reference to Figures 5A to 5E , the locking structures 230 are arranged around the ring 212 so that the expanded shape of the gasket body 250 of each locking structure 230 is in the same rotational direction relative to the central axis X. For example, relative to Figure 5B In the orientation, the gasket body 250 of each of the locking structures 230 expands in a clockwise direction (eg, the first end 240 is rotationally “in front of” the corresponding second end 242 in a clockwise direction). Figure 5B It is further reflected that the first end 240 may define a curved edge 258 to further facilitate initial guidance of the gasket body 250 into one of the retaining structures 112 .

[0130] The guide surface 256 of each locking structure 230 is defined opposite the ring 212 and, in some embodiments, mimics the curvature of the cylindrical outer face 222. Other shapes may also be acceptable, which may be curved or not. In any case, and as indicated in FIG5 , the guide surfaces 256 collectively define a maximum outer diameter D3 relative to the central axis X. Figure 4D The maximum outer diameter D3 is designed according to the size of the first connection form 56 and is particularly designed to be slightly smaller than the capture diameter D1 and larger than the gap diameter D2. The reason will be clearly explained below.

[0131] In some embodiments, each of the locking structures 230 may further include a stop body 260. The stop body 260 is located at the second end 242 of the corresponding locking structure 230 and protrudes longitudinally from or relative to the locking surface 254 of the corresponding gasket body 250 in a direction opposite to the abutment surface 252. In this regard, the stop body 260 defines a height H that protrudes beyond the gasket body 250. S The stop surface 262. Figure 5D As shown, the height H of the stopper body 260 B is selected to be larger than the retaining structure 112 ( Figure 4F )'s longitudinal spacing L( Figure 4F ), the reasons are clearly explained below. In other embodiments, the brake body 260 can be omitted.

[0132] although Figures 5A to 5EThe second connection form 72 is shown as including two of the locking structures 230, but in other embodiments, three or more of the locking structures 230 are provided, wherein the number of locking structures 230 is optionally the same as that provided with the complementary first connection form 56 ( Figure 4A ) of the retaining structure 112 ( Figure 4A ) matches the number of circumferentially adjacent ones of the locking structures 230. Similarly, the spacing between circumferentially adjacent ones of the locking structures 230 mimics the circumferential spacing between the retaining structures 112 (e.g., the locking structures 230 are optionally equally spaced around the rings 212, 100 in some embodiments). Regardless, the circumferential length (e.g., arc length) of each of the locking structures 240 is less than the open area 150 ( Figure 4B ) is the circumferential length of each open area in ).

[0133] refer to Figure 6 , engagement between the first connection form 56 and the second connection form 72 (and therefore between the closure 54 and the adapter 180) initially requires alignment of the adapter 180 with the fluid outlet 64. The closure 54 and the adapter 180 are spatially arranged so that the contact surface 218 of the adapter 180 faces the contact surface 120 of the closure 54, and the locking structures 230 are rotationally offset from the retaining structure 112 (i.e., the locking structures 230 are each longitudinally aligned with a corresponding one of the open areas 150). Then, as Figure 7A and Figure 7B As shown, the cover 54 and the adapter 180 are directed toward each other so that the contact surface 218 of the adapter 180 contacts the contact surface 120 of the cover 54. The base 192 is located above the spout 100 (hidden in the Figure 7A and Figure 7B But for example in Figure 6 ), and the central axis X of the adapter 180 is aligned with the longitudinal axis A of the cover 54. Consistent with the above description, the outer diameter of the ring 212 of the base 192 is smaller than the gap diameter D2 ( Figure 4D ), thereby allowing the base 192 to nest on the spout 100 "inside" the retaining structure 112. Figure 7A and Figure 7B In the initial state, the locking structure 230 is rotationally spaced from the retaining structure 112. However, due to the corresponding geometries of the cover 54 and the adapter 180, the engagement between the contact surface 120 and the contact surface 218 circumferentially aligns the locking structure 230 with the retaining structure 112 (e.g., Figure 7A The first end 240 of the locking structure 230 is shown circumferentially aligned with the capture area 134 of the first retaining structure 112a).

[0134] The adapter 180 is then rotated relative to the cover 54 (and / or vice versa) about the common axis A, X in a direction that causes the first end 240 of each of the locking structures 230 to move toward the first end 124 of the corresponding one of the retaining structures 112. For example, relative to Figure 7B In the orientation of FIG, the adapter 180 is rotated clockwise relative to the cover 54. By this rotation, the gasket body 250 of each of the locking structures 230 is guided into the capture area 134 of the corresponding one of the retaining structures 112. Figure 8A and Figure 8B The initial interface between the corresponding pairs of retaining structure 112 and locking structure 230 is shown. Figure 8B It is highlighted that the maximum outer diameter D3 collectively established by the locking structures 230 is greater than the gap diameter D2 collectively established by the retaining structures 112, thereby positioning the locking structures 230 radially to interface with their counterparts in the retaining structures 112. However, as Figure 8C As shown in the cross-sectional view, the maximum outer diameter D3 is smaller than the capture diameter D1, thereby preventing the guide surface 136 of the retaining structure 112 from openly contacting the guide surface 256 of the corresponding locking structure 230 in a manner that may otherwise hinder the rotation of the adapter 180 relative to the cover 54 (and / or vice versa).

[0135] As Figure 8D As reflected in the partial cross-sectional view, the height H of the gasket body 250 at the first end 240 of the locking structure 230 is S ( Figure 5D ) is less than the longitudinal spacing L of the capture region 134 at the first end 124 of the retaining structure 112 ( Figure 4E ). Thus, the gasket body 250 is easily guided into the capture area 134, sliding between the contact surface 120 and the engagement surface 138. The sliding plane interface established between the contact surface 120 of the closure 54 and the contact surface 218 of the adapter 180 maintains the circumferential alignment of the gasket body 250 and the capture area 134 as the adapter 180 continues to rotate relative to the closure 54 (and / or vice versa).

[0136] As the adapter 180 is further rotated relative to the cover 54 (and / or vice versa) (i.e., relative to Figure 8D134), establishing a wedge-shaped coupling or engagement between the retaining structure 112 and the locking structure 230 due to the tapered shape of the capture area 134 and the gasket body 250. The locking surface 254 of the gasket body 250 abuts the engagement surface 138 of the wedge-shaped body 132. The angle or plane of the sliding engagement between the locking surface 254 and the engagement surface 138 (as the closure 54 and adapter 180 are rotated relative to each other) guides the adapter 180 into more secure engagement with the closure 54, forcing the abutment surface 252 of the gasket body 250 toward the contact surface 120 of the retaining structure 112. In some embodiments, the wedge-shaped locking engagement can be further facilitated by forming at least the relevant portions of the closure 54 and adapter 180 of different materials. For example, in some embodiments, the cover 54 is a plastic material and the adapter 180 is a metal (e.g., stainless steel); using these and similar configurations, the plastic-based retaining structure 112 can compress or deflect slightly in response to forces applied by the harder metal-based gasket body 250, resulting in a more secure locking interface.

[0137] With continued rotation of the adapter 180 relative to the cover 54 (and / or vice versa), the gasket body 250 of each locking structure 230 will become frictionally and mechanically locked within the capture area 134 of a corresponding one of the retaining structures 112 . Figure 9A and Figure 9B 1 and 2 show the locked state of the adapter 180 and the cover 54. An optional stop body 260 provided with each of the locking structures 230 prevents excessive rotation of the adapter 180 relative to the cover 54 (and / or vice versa). Figure 9B As best shown, the height H of the stop body 260 B ( Figure 5D ) is greater than the longitudinal spacing L of the capture region 134 (general reference) Figure 4E ), wherein the abutment between the stop surface 262 and the first end 124 of the retaining structure 112 prevents further rotation.

[0138] In the locked state, Figure 9CAs reflected, a liquid-tight seal is maintained (it should be understood that a liquid-tight seal can be achieved or obtained before the locked state is achieved). In particular, the leading surface 102 of the spout 100 contacts and seals against the radially inner face 216 of the base 192, and the annular rib(s) 106 of the fluid outlet 64 contacts and seals against the cylindrical inner face 220 of the base 192. As part of the rotational locking operation described above, a secure liquid-tight contact between the leading surface 102 and the radially inner face 216 is enhanced; due to the wedge-shaped interface between the retaining structure 112 and the locking structure 230, the radially inner face 216 is forced into close contact with the leading surface 102 (i.e., relative to the radially inner face 220). Figure 9C 102 , the adapter 180 is urged or drawn downwardly relative to the closure 54 (and thus the radially inner face 216 is urged or drawn downwardly onto the leading surface 102 ) as the adapter 180 rotates as described above to better ensure a liquid-tight seal. In some embodiments, a liquid-tight sealing interface can be further facilitated by forming at least relevant portions of the closure 54 and the adapter 180 of different materials. For example, in some embodiments, the closure 54 is a plastic material and the adapter 180 is a metal (e.g., stainless steel); with these and similar configurations, the plastic-based spout 100 and annular rib 106 of the closure 54 can compress or deflect slightly in response to the force exerted by the harder, metal-based base 192 , thereby resulting in a more secure sealing contact between the components.

[0139] After use, the adapter 180 can be released from the closure 54 by rotating the adapter 180 in the opposite direction (e.g., counterclockwise) relative to the closure 54 to extract the locking structure 230 from the corresponding retaining structure 112. Once disengaged, the adapter 180 can be separated from the closure 54. In some embodiments, a reverse camming interface between the retaining structure 112 and the locking structure 230 can occur as the adapter 180 is rotated (i.e., an interface opposite to that described above) to help release any seal between the adapter 180 and the closure 54. Once disengaged, the adapter 180 can be separated from the closure 54.

[0140] As described above, in some embodiments, the cover 54 and the adapter 180 can be formed of different materials. For example, the cover 54 can be a plastic component (e.g., molded plastic) and the adapter 180 can be metal (e.g., stainless steel). Using these optional configurations, after the spraying operation, the adapter 180 can be easily cleaned and reused, and the cover 54 can be considered a disposable item.

[0141] Return to Figure 3 , although the above description has provided a complementary second connection form 72 as the adapter 180 ( Figure 5A) part, but other configurations are also acceptable. For example, the second connection form 72 can be permanently assembled to the spray gun or provided as an integral part of the spray gun (for example, the second connection form 72 described above can be provided as the spray gun 30 ( Figure 1 ) of the entry port 48( Figure 1 ) or set at the spray gun 30 ( Figure 1 ) of the entry port 48( Figure 1 ) at). That is, the spray gun reservoir connector system of the present disclosure does not require an adapter.

[0142] Furthermore, the positions of the first connection form 56 and the second connection form 72 may also be reversed. In other embodiments, the second connection form 72 may then be formed or provided with the cover 54, and the first connection form 56 may be formed or provided with the spray gun inlet 70 (e.g., an adapter, a spray gun inlet port, etc.). For example, Figure 10 Portions of an alternative spray gun reservoir connector system 300 are shown, including complementary first and second connection forms 302, 304 (referenced generally). The first connection form 302 is provided as part of a closure 310; the second connection form 304 is provided as part of a spray gun inlet, such as an adapter 312 as shown.

[0143] The cover 310 may be similar to the cover 54 described above ( Figure 2 ), and generally includes a wall 320 and a fluid outlet including a spout 322. The first connection form 302 includes a plurality of locking structures 330 circumferentially spaced from one another along the exterior of the spout 322. The locking structures 330 may be highly similar to the locking structures 230 ( Figure 5A ), wherein the nozzle 322 is similar in function to the base 192 ( Figure 5A ).like Figure 11 As further shown in FIG. 3 , each of the locking structures 330 includes a spacer body 332 and an optional stop body 334. The spacer body 332 may have the same configuration as described above with respect to the spacer body 250 ( Figure 5A ) and generally provide an expanded height from the first end 336 toward the second end 338. The stop body 334 is located at the second end 338 and can have the same configuration as described above with respect to the stop body 260 ( Figure 5A ) Any one of the characteristic structures described.

[0144] return Figure 10, the cover 310 can provide one or more sealing features that are optionally considered part of the first connection form 302. For example, an angled face seal 340 can be formed along the interior of the spout 322 near the leading end 342. Additionally or alternatively, an annular rib seal 344 can be formed along the interior of the spout 322 at a location spaced from the leading end 342. Other sealing configurations are also contemplated.

[0145] Adapter 312 may be similar to adapter 180 described above ( Figure 5A ), and generally includes a tubular member 350. The second connection form 304 protrudes from the tubular member 350 and includes a platform 352, a ring 354, and a plurality of retaining structures 356. The platform 352 has an annular shape that defines an outer diameter that is greater than the outer diameter of the tubular member 350. The ring 354 is coaxial with the tubular member 350 and can be considered to function similarly to the nozzle 100 (described above). Figure 4A ). The outer diameter of the ring 354 is smaller than the inner diameter of the nozzle 322, thereby allowing the ring 354 to be nested within the nozzle 322. A sealing feature structure can be provided at the outer diameter of the ring 354 to provide additional sealing and retention of the nozzle 322. The retention structure 356 can be highly similar to the retention structure 112 ( Figure 4A ), and includes a support body 360 and a wedge-shaped body 362. The surfaces of the platform 352, the support body 360, and the wedge-shaped body 362 combine to define a capture area 364 commensurate with the above description, which is sized to slidably receive a corresponding one of the shim bodies 332 in a wedge-shaped engagement.

[0146] The ring 354 may be provided as a separate component mounted to the connection form. In this way, more complex geometries may be obtained than would otherwise be possible with conventional manufacturing techniques.

[0147] The connection of the adapter 312 to the closure 310 is achieved in a manner highly similar to the previous embodiment. The adapter 312 is axially aligned with the spout 322, wherein the retaining structure 356 is rotationally offset relative to the locking structure 330. The adapter 312 is then advanced onto the closure 310, wherein the ring 354 is nested within the spout 322. The adapter 312 is then rotated relative to the closure 310 (and / or vice versa) to engage the retaining structure 356 with the corresponding one of the locking structures 330. A wedge-type interface is provided, wherein the adapter 312 is pulled into firm contact with the closure 310 as described above. With further rotation, the gasket body 332 of each locking structure in the locking structure 330 becomes frictionally and mechanically locked within the capture area 364 of the corresponding retaining structure 356. Where provided, the stop body 334 of each locking structure in the locking structure 330 contacts the corresponding retaining structure 356 to prevent excessive rotation of the adapter 312. Figure 12is a simplified representation of the locking arrangement between the closure 310 and the adapter 312 (and therefore between the complementary first connection form 302 and the second connection form 304 (referenced generally)). The gasket body 332 of each of the locking structures 330 is wedged within the capture area 364 of the corresponding retaining structure 356. At least one liquid-tight seal is provided at the contact interface between the angled face seal 340 of the spout 322 and the ring 354 of the adapter 312. Figure 12 In the embodiment of the present invention, a second liquid-tight seal is provided at the contact interface between the leading end portion 370 of the ring 354 and the annular rib seal 372 provided with the cover 310. It will be understood that Figure 12 The position of the annular rib seal 372 in the figure is similar to Figure 10 The annular rib seal 342 is different and reflects an alternative sealing method.

[0148] While the above description has provided the complementary second connection form 304 as part of the adapter 312, other configurations are also acceptable. For example, the second connection form 304 may be permanently assembled to the spray gun or provided as an integral part of the spray gun (e.g., the second connection form 304 described above may be provided as a spray gun 30 ( Figure 1 ) of the entry port 48( Figure 1 ) or set at this port).

[0149] Figure 13 A portion of an alternative spray gun reservoir connector system 400 according to the principles of the present disclosure is shown, the system including complementary first and second connection forms 402, 404 (referenced generally). The first connection form 402 is provided as part of a closure 410; the second connection form 404 is provided as part of a spray gun inlet, such as an adapter 412 suitable for connection to a spray gun as shown.

[0150] Cap 410 14A to 14E , and in many respects can be highly similar to the closure 54 described above ( Figure 4A ) or the like. The closure 410 generally includes a wall 420 and a fluid outlet 422. The fluid outlet 422 includes a nozzle 424 along with optional sealing features as described above, such as a leading surface 426 of the nozzle 424 and / or one or more annular ribs 428 formed along the exterior of the nozzle 424 near the leading surface 426. Where provided, in some embodiments, the sealing features can be considered as part of the first connection form 402.

[0151] The first connection form 402 (usually Figure 14A ) includes a platform 440 and a plurality of retaining structures 442. The retaining structures 442 can be highly similar to the retaining structures 112 ( Figure 4A ) and are circumferentially spaced from one another at locations radially spaced from the nozzle 424. Generally speaking, each of the retaining structures 442 includes a base plate 444, a support body 446, and a wedge-shaped body 448. The base plate 444 defines a contact surface 450 that is generally aligned with the surface of the platform 440 in the region of the retaining structure 442 (e.g., Figure 14E ). The support body 446 protrudes from the base plate 444 and defines a guide surface 452 ( Figure 14B ). The wedge-shaped body 448 extends radially inward from the support body 446 opposite the bottom plate 444 and is defined Figure 14E The best visible engagement surface 454. The engagement surfaces 450 to 454 combine to define a Figure 14E Reflecting the tapered or angular shape of the capture area 456. For example, and relative to Figure 14E In the embodiment of the present invention, the shape of the capture region 456 has a vertical downward component between the first end 458 and the second end 459. In other words, when the capture region 456 rotates around the nozzle 424, the shape of the capture region 456 can resemble a segment of a spiral. Other shapes or configurations are also contemplated. In other embodiments, three or more of the retaining structures 442 can be provided.

[0152] Platform 440 is similar in functionality to platform 110 described above ( Figure 4A ), and defines a ramp surface 460. Compared to the other embodiments discussed above, the platform 440 is configured such that the ramp surface 460 has a varying shape around the nozzle 424. In particular, and as 14B to 14D As best shown, a plurality of undercuts 462 are defined in the platform 440, thereby creating a plurality of ramp segments 464. The ramp surface 460 along each of the ramp segments 464 has a partial helical shape that transitions longitudinally as the ramp segment 464 rotates about the nozzle 424. For example, the first ramp segment 464a is 14B to 14D 462a and the second undercut 462b. The first ramp segment 464a is positioned to correspond to the first retaining structure 442a. With these conventions in mind, the ramp surface 460 of the first ramp segment 464a tapers longitudinally downward from the first undercut 462a to the second undercut 462b. Figure 14B In an upright orientation, the ramp surface 460 of the first ramp segment 464a is vertically "above" the base plate 444 of the first retaining structure 442a at the location of the first undercut 462a, vertically aligned with the base plate 444 in the region of the first retaining structure 442a, and vertically "below" the base plate at the location of the second undercut 462b. Figure 14B) is defined at each undercut portion in the undercut portion 462, the reason for which will be clearly explained below. Figure 14D As best reflected, at least one undercut 462 is formed between circumferentially adjacent ones of the retaining structures 442; in some embodiments, a single one of the undercuts 462 is located at the circumferential midpoint between a pair of retaining structures 442. In related embodiments, the number of undercuts 462 (and therefore the number of ramp segments 464) corresponds to the number of retaining structures 442.

[0153] return Figure 13 , adapter 412 can be highly similar to adapter 180 ( Figure 5A ), and generally includes a tubular member 480. The tubular member 480 may include the tubular member 190 ( Figure 5A ) Any of the features described in the second connection form 404. The second connection form 404 includes a base 500 and a plurality of locking structures 502. The base 500 protrudes from the tubular member 480 and carries the locking structures 502. The locking structures 502 are in turn configured to selectively interface with corresponding ones of the retaining structures 442 as described below.

[0154] exist 15A to 15D Adapter 412 is shown in more detail in FIG. Base 500 includes a shoulder 510 and a ring 512. Figure 15D As best shown, the shoulder 510 and the ring 512 combine to define a chamber 514 that opens into the passageway of the tubular member 480 and is configured to receive the closure 410 ( Figure 14A ) of the nozzle 424 ( Figure 14A ). The shoulder 510 extends radially outward and downward from the tubular member 480 and defines an inner face 516. The ring 512 protrudes longitudinally from the outer periphery of the shoulder 510 in a direction opposite to the tubular member 480 and terminates at a contact face 518. In addition, the ring 512 defines a cylindrical inner face 520 and a cylindrical outer face 522. The inner diameter of the ring 512 (e.g., the diameter defined by the cylindrical inner face 520) corresponds to (e.g., is approximately or slightly larger than) the outer diameter of the nozzle 424. The outer diameter of the ring 512 can further extend to expand to the contact face 518 or can be uniform. In any case, the maximum outer diameter of the ring 512 (e.g., the maximum diameter defined by the cylindrical outer face 522) is selected to be nested within the retaining structure 442 ( Figure 14A ) within the gap diameter established together.

[0155] The geometry of the shape of the contact surface 518 is similar to that described above with respect to the ramp surface 460 ( Figure 14A ) are consistent with those described in . In particular, a plurality of undercuts 530 are formed along the contact surface 518, thereby generating a plurality of track segments 532. The number, circumferential position and shape of the undercuts 530 in the contact surface 518 are consistent with those of the platform 440 ( Figure 14A ) in the undercut 462 ( 14B to 14D ) corresponds to the above. A partial spiral shape is generated along the contact surface 518 of each of the track segments 532, and a tab 534 is formed at each of the undercuts 530.

[0156] In some embodiments, the locking structures 502 are identical and each define a first end 540 that is opposite a second end 542 in a circumferential extension along the ring 512, as shown. Figure 15B The locking structure 502 may be similar to the locking structure 230 ( Figure 5A ), and includes a spacer or wedge-shaped body 550 that defines an abutment surface 552, a locking surface 554, and a guide surface 556. The abutment surface 552 protrudes from the ring 512 at or proximate to the contact surface 518. In some embodiments, the shape of the abutment surface 552 matches the corresponding shape of the contact surface 518 and, therefore, can have an angled orientation (e.g., similar to a segment of a helix).

[0157] The locking surface 554 is formed longitudinally relative to the abutment surface 552 to define the height of the gasket body 550. In some embodiments, the plane of the locking surface 552 is substantially parallel to the plane of the abutment surface 552, thereby creating a shape or geometry relative to the ring 512 that is similar to that formed by Figure 15B With this configuration, the vertical position of the gasket body 550 relative to the ring 512 changes as the gasket body 550 rotates around the ring 512, with the first end 540 relative to the ring 512. 15A to 15D The upright orientation is vertically "below" the second end 542. The locking structures 502 are arranged around the ring 512 so that the angular orientation of the gasket body 550 of each locking structure 502 is in the same rotational direction relative to the central axis X. For example, relative to Figure 15B In the orientation, the gasket body 550 of each locking structure in the locking structure 520 extends downward in a clockwise direction (e.g., the vertically lower first end 540 is rotationally "in front of" the corresponding vertically higher second end 542 in a clockwise direction).

[0158] The number of locking structures 502 provided with adapters 412 is equal to the number of locking structures 502 provided with covers 410 ( Figure 14A ) of the retaining structure 442( Figure 14A ) corresponds to the number of. Thus, three or more of the locking structures 502 may be included in other embodiments. Figure 5A ) In contrast, the locking structure 502 need not include a stop body.

[0159] return Figure 13 , the connection of the cover 410 and the adapter 412 is consistent with the previous explanation. First, the ring 512 is aligned with the spout 424. Figure 13 In the arrangement of FIG, the adapter 412 is arranged in a rotational manner, thereby causing the locking structure 502 to be rotationally offset from the retaining structure 442. The adapter 412 is then guided onto the cover 410 (and / or vice versa) with the spout 424 nested within the base 500.

[0160] exist Figure 16A and Figure 16B In the initial assembled state of FIG. 4 , the adapter 412 has been placed onto the closure 410 as described above, with the locking structure 502 rotationally spaced from the retaining structure 442. The contact surface 518 of the adapter 412 abuts the ramp surface 460 of the closure platform 440. As described above, due to the partial helical shape of the ramp surface 460 along the ramp segment 464 of the closure 410 and the partial helical shape of the contact surface 518 along the track segment 532 of the adapter 412, the locking structure 502 is located vertically "above" (relative to the position of the locking structure 502) the capture area 456 of each of the retaining structures 442. Figure 16A and Figure 16B orientation).

[0161] The adapter 412 is then rotated relative to the cover 410 (and / or vice versa) to direct each of the locking structures 502 into engagement with a corresponding one of the retaining structures 442. For example, and with reference to the first retaining structures 442a and Figure 16A and 16B 442a, the adapter 412 can be rotated (e.g., clockwise) to allow the first end 540 of the gasket body 550 to approach and then enter the capture area 456 at the first end 458 of the first retaining structure 442a. Due to the sliding interface between the ramp surface 460 and the contact surface 518 and the corresponding helical shape, as the adapter 412 is rotated, the adapter 412 drops or lowers vertically relative to the retaining structure 442, thereby aligning the first end 540 of the first locking structure 502a with the capture area 456 at the first end 458 of the first retaining structure 442a as the first locking structure 502a approaches the first end 458 of the first retaining structure 442a.

[0162] With continued rotation of the adapter 412 relative to the cover 410 (and / or vice versa), the gasket body 550 of each locking structure 502 will become frictionally and mechanically locked within the capture area 456 of a corresponding one of the retaining structures 442 . Figure 17A and Figure 17BThe locked state of the cover 410 and the adapter 412 is shown. The contact surface 518 of the adapter 412 is further rotated relative to and along the ramp surface 460, thereby achieving more complete engagement of the locking structure 502 within the retaining structure 442. The tabs 534 of each track segment 532 (one of which is at Figure 17A ) and shoulders 466 (one of which is Figure 17A The abutment interface between the adapter 412 and the cover 410 prevents excessive rotation of the adapter 412 relative to the cover 410 (and / or vice versa) and serves to stabilize the connection assembly. Figure 17C , shows one of the wedge bodies 550 housed within the capture area 456 (generally referenced) of one of the retaining structures 442 and reflects that the shape and spatial orientation of the wedge body 550 mimics the shape and spatial orientation of the capture area 456. In the locked state, the abutment surface 552 of the shim body 550 abuts the contact surface 450 of the base plate 444 and the locking surface 554 of the shim body 550 abuts the engagement surface 454 of the wedge body 448. The downward angular orientation of the contact surface 450 and the engagement surface 454 relative to a plane perpendicular to the axis of rotation and the downward angular orientation of the abutment surface 552 and the locking surface 554 relative to a plane perpendicular to the axis of rotation indicate that as the shim body 550 is progressively advanced through the capture area 456 (i.e., the first end 540 of the shim body 550 is progressively advanced from the first end 458 to the second end 459 of the retaining structure 442), the adapter 412 is pulled or drawn downward (relative to the adapter 412). Figure 17C oriented) to the cover 410, thereby promoting a liquid-tight seal between the components. As with the other embodiments above, other sealing features may be provided.

[0163] Although the above description has provided a complementary second connection form 404 (usually in Figure 13 ) as part of the adapter 412, but other configurations are also acceptable. For example, the second connection form 404 can be permanently assembled to the spray gun or provided as an integral part of the spray gun (for example, the second connection form 404 described above can be provided as a spray gun 30 ( Figure 1 ) of the entry port 48( Figure 1 ) or provided at the port). In addition, the positions of the first connection form 402 and the second connection form 404 can be reversed. In other embodiments, the second connection form 404 can then be formed or provided with the cover 410, and the first connection form 402 can be formed or provided with the spray gun inlet (e.g., an adapter, an integral spray gun inlet port, etc.).

[0164] As described above, the tapered or ramped interface provided by the ramp surface 460 can be implemented with other geometries or designs in accordance with the principles of the present disclosure. For example, a portion of another cover 580 in accordance with the principles of the present disclosure may be provided. 18A to 18D The cover 580 is similar to any of the covers described in the present disclosure and includes a platform 582. For ease of understanding, the connection form feature structure described above is 18A to 18D Omitted from the illustration. A first undercut 584a and a second undercut 584b are formed along the face 586 of the platform 582 consistent with the above explanation. The face 586 rotates about the nozzle 588, and the direction of rotation along the nozzle 588 can be specified (e.g., clockwise or counterclockwise). Relative to the clockwise direction, the first segment 590a of the face 586 can be considered to extend circumferentially from the first undercut 584a to the second undercut 584b, and the second segment 590b can be considered to extend circumferentially from the second undercut 584b to the first undercut 584a. Each of the segments 590a, 590b includes a flat segment 592 and a sloped segment 594. The sloped segment 594 is similar to the sloped surface 460 ( Figure 14A ), while the flat segment 592 is substantially planar (e.g., the plane of the ramp segment 594 is inclined relative to the plane of the flat segment 592). With this configuration, the tapered or ramped interface described above can be provided, and the cover 580 is designed to facilitate ease of manufacture by molding.

[0165] Any of the complementary connection forms 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 components or assemblies that include connection geometry to permit connection to the remainder of the closure. For example, the modular closure assembly 600 may be formed as a separate modular component or assembly. Figure 19 6 and includes a modular liquid outlet 602 and a modular closure base 604. The modular components 602, 604 are formed independently and subsequently assembled. Generally speaking, the modular liquid outlet 602 includes components of a platform 610, a liquid outlet 612, and a connection form 614 (generally referred to as). The platform 610 is sized and shaped according to corresponding features of the modular closure base 604 described below and supports the liquid outlet 612 and the connection form 614. The liquid outlet 612 and the connection form 614 can take any of the above-mentioned forms and Figure 19 In a non-limiting example, the liquid outlet 64 ( Figure 4A ) and the first connection form 56 ( Figure 4A Any other connection forms described herein may alternatively be incorporated into the modular liquid outlet 602 .

[0166] The modular closure base 604 generally includes a wall 620 and a rim 622 projecting from the wall 620. The wall 620 forms a central opening 624, and is sized and shaped according to the size and shape of the platform 610. The central opening 624 can take on a variety of shapes and sizes, but is generally configured such that the outer diameter of the opening 624 is larger than the inner diameter of the liquid outlet 612 and smaller than the outer diameter of the platform 610.

[0167] Assembly of the modular cover assembly 600 includes securing the table 610 to the wall 620 with a central opening 624 leading to the liquid outlet 612. In some embodiments, the modular liquid outlet 602 is secured to the modular cover base 604 by welding and / or adhesives, etc. In some embodiments, the adhesive joints and / or welded joints serve to both retain and create a liquid-tight seal when the modular liquid outlet 602 is assembled to the modular cover base 604. Other attachment techniques may also be acceptable, such as quarter-turn locks, providing a mechanical locking mechanism, threads, snap fits, other mechanical fasteners (e.g., screws, rivets, and / or molded posts that are cold-formed / hot-formed and rapidly increased downwardly to hold / retain the component(s) in place and provide a suitable leak-proof seal).

[0168] Compared to what might otherwise be possible using, for example, injection molding, constructing the closure 600 using modular liquid outlets 602 and modular closure bases 604 can provide the advantage of allowing more complex geometries to be easily created. For example, in a given closure 600, it may be impossible to form a specific geometry in an injection molded part due to the location of the mold parting and the necessary trajectory of the slide required to form certain features. However, if the closure 600 is divided into modular components, tooling can be designed to directly access surfaces of each modular component that would be inaccessible on a one-piece closure. Thus, further geometric complexity can be achieved.

[0169] The modular cover components 602, 604 may also be constructed of different materials as desired for the application. For example, it may be desirable to use an engineered plastic for the modular liquid outlet 602 (due to the strength and tolerances required for a secure and durable connection to the spray gun), while a lower cost polymer may be used for the modular cover base 604.

[0170] In other embodiments, the modular liquid outlet 602 provided above can alternatively be attached or pre-assembled to the end of a paint supply line or paint storage bag, etc., and then connected to the spray gun paint inlet port. In this way, paint can be provided directly to the spray gun without the need for a modular cover base 504 (or other reservoir components).

[0171] The spray gun reservoir connector system disclosed herein offers significant improvements over previous designs. By positioning the various components, in the form of a connector, outside of or separately from the liquid outlet (or spout) formed by the cap, the inner diameter of the spout can be increased compared to conventional designs. This, in turn, improves the flow rate through the spout. Furthermore, the connector system disclosed herein lowers the center of gravity of the reservoir relative to the spray gun compared to conventional designs. Furthermore, a more stable and secure connection is provided, minimizing any potential "wobbling" of the reservoir relative to the spray gun during spraying operations.

[0172] 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 present disclosure.

Claims

1. A spray gun reservoir connector system, comprising: a reservoir, the reservoir comprising a closure, wherein the closure further comprises a liquid outlet, the liquid outlet having a spout; Spray gun inlet; a first connector form, the first connector form being provided with the spray gun inlet, the first connector form comprising a plurality of retaining structures, each of the plurality of retaining structures defining a capture region, the capture region being configured to have a tapered shape, wherein the retaining structures are collectively arranged in a circular pattern and circumferentially spaced from one another, each retaining structure comprising a support body and a wedge-shaped body, wherein the wedge-shaped body extends radially inwardly from the support body; as well as a second connector form provided with the cover, the second connector form comprising a plurality of locking structures, each of the plurality of locking structures comprising a gasket body configured to have a tapered shape corresponding to a shape of the capture region and configured to selectively interface with the capture region of a corresponding one of the retaining structures, wherein the locking structures are collectively arranged in a circular pattern and circumferentially spaced from one another; wherein the connector form is configured such that upon rotation of the spray gun inlet relative to the cover, the capture region slidably receives a corresponding one of the gasket bodies in a wedging engagement; wherein said connector form associated with said closure is radially spaced outside of said spout.

2. The connector system of claim 1, wherein the nozzle has an inner diameter of not less than 22 mm.

3. The connector system of claim 1, wherein the locking structure is disposed around the liquid outlet and is radially spaced from the liquid outlet.

4. The connector system of claim 1, wherein the spray gun inlet is on an adapter adapted to connect to a spray gun.

5. The connector system of claim 4, wherein the adapter further comprises a connector feature and a tubular member configured for connection to a spray gun inlet port.

6. The connector system of claim 1, wherein the spray gun inlet is integral with the spray gun.

7. A connector system according to claim 1, wherein the retaining structures each include a contact surface and an engagement surface defined by the wedge-shaped body, and further, wherein the engagement surface is longitudinally spaced from the contact surface, and even further, wherein the contact surface and the engagement surface combine to define at least a portion of the corresponding capture area.

8. The connector system of claim 7, wherein at least one of the engagement surface and the contact surface defines a plane that is arranged at an angle to a plane that is perpendicular to an axis of rotation of the system.

9. The connector system of claim 1 wherein the first connector form further comprises a platform defining a contact surface, and further wherein the retention structure protrudes longitudinally away from the contact surface.

10. The connector system of claim 9, wherein the contact surface defines a circle.

11. The connector system of claim 9, wherein at least a portion of the contact surface is substantially planar.

12. The connector system of claim 9, wherein the platform defines a plurality of undercuts in the contact surface.

13. The connector system of claim 1, wherein each of the locking structures further comprises a stop body extending from the corresponding washer body.

14. A connector system according to any one of claims 1-13, wherein the gasket body of each locking structure in the locking structure defines an abutment surface opposite to the locking surface, and further, wherein at least one of the abutment surface and the locking surface defines a plane arranged at an angle to a plane perpendicular to the rotation axis of the system.

15. The connector system of claim 1, wherein the spout includes an angled face seal formed along an interior of the spout proximate a leading end of the spout.

16. The connector system of claim 1, wherein the spout includes an annular rib seal formed along an interior of the spout at a location spaced from the leading end.

17. A connector system according to claim 1, wherein the first connector form includes a platform, wherein the surfaces of the platform, the support body and the wedge-shaped body combine to define the capture area, and the size of the capture area is set to slidably receive a corresponding one of the gasket bodies in a wedge-shaped engagement.

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