Spray gun component with elastic flow control valve

Abstract

Aspects of the present disclosure relate to a spray gun component for use in a spray gun system. The lance component may include a lance component body further including a liquid inlet and a liquid outlet. At least a portion of the resilient flow control valve is disposed within a liquid passage formed between the liquid inlet and the liquid outlet. The elastic flow control valve has an upstream side and a downstream side. The upstream side is configured to be in fluid communication with the liquid inlet, and the downstream side is in fluid communication with the atmosphere. In a second mode, the flow of gas from the lance system is such that the differential pressure across the elastic flow control valve is at least the opening pressure of the elastic flow control valve and thereby causes the elastic flow control valve to change to an open configuration.

Description

Background Art

[0001] Spray equipment is used in many processes including surface coating applications, combustion and chemical reaction control. Spray equipment can include a device that converts bulk liquid into a fine spray or mist of droplets. The size and shape of the spray equipment can depend on the desired application and / or delivery system. Applications over the years include delivering gaseous hydrocarbon feeds, dispensing chemical pesticides and applying protective or aesthetically pleasing surface coatings in fluidized catalytic cracking processes.

[0002] Spray equipment can be used, for example, in a vehicle repair body shop to apply liquid coating media such as primer, paint and / or varnish to vehicle parts. Spray equipment such as a spray gun can be made of a combination of metal and polymer materials, and includes a platform and a spray head assembly. The spray head assembly includes a nozzle for distributing liquid, one or more atomizing gas outlets for atomizing the liquid when the liquid leaves the nozzle, and two or more shaping gas outlets for shaping the atomized liquid into a desired spray pattern. The spray gun contains a series of internal passages that distribute gas from a gas supply manifold in the platform to the atomizing gas outlet and shaping gas outlet in the spray head assembly. Such spray guns are sometimes referred to as air atomization type, air spray type, air-assisted type or air impact type. Summary of the invention

[0003] In some designs, a manually operated valve such as a needle valve is used to control the flow of coating liquid through the spray gun (see, e.g. Figure 1 and Figure 2 ). A needle (or valve stem) is located along the central axis of the nozzle and cuts off on the valve seat near the outlet orifice. The needle / stem is usually connected to a trigger which is a means of actuation by hand by the user. When the trigger is pulled back by the user, the needle will slide away from the valve seat and allow liquid to flow through the channel outlet. When the trigger is released, a spring is used to push the needle back to its closed position in contact with the valve seat. Along the length of the needle, seals (or packings) are used to isolate the liquid in the flow channel from the external area of ​​the spray gun.

[0004] These components found in the aforementioned spray guns are known to require tight manufacturing tolerances, significantly increase the cost of the spray gun, wear over time due to cycling, and require routine cleaning and maintenance by the user.

[0005] Aspects of the present disclosure relate to a spray gun component for use in a spray gun system. The spray gun component may include a spray gun component body further including a liquid inlet and a liquid outlet. A liquid passage is formed between the liquid inlet and the liquid outlet.

[0006] At least a portion of the elastic flow control valve is disposed within the liquid passage. The elastic flow control valve has an upstream side and a downstream side. The upstream side is configured to be in fluid communication with the liquid inlet, and the downstream side is in fluid communication with the atmosphere. In at least one embodiment, the elastic flow control valve is an indirectly actuated valve that can be opened or closed via a differential pressure across the valve and is different from a manually operated valve.

[0007] In the first mode, the differential pressure across the elastomeric flow control valve is less than the opening pressure of the elastomeric flow control valve and results in a closed configuration. In the second mode, the flow of gas from the spray gun system causes the differential pressure across the elastomeric flow control valve to be at least the opening pressure of the elastomeric flow control valve and thereby causes the elastomeric flow control valve to change to an open configuration.

[0008] In at least one embodiment, the elastic flow control valve has an elastic portion having a dimension measured in a plane transverse to the axis of the elastic flow control valve, and the differential pressure is measured at no greater than the dimension upstream and downstream of the opening of the elastic portion.

[0009] In at least one embodiment, in the first mode, the lance system does not exhaust gas at the mixing zone.

[0010] In at least one embodiment, the spray gun system does not use a needle valve within the liquid passage to control liquid flow.

[0011] In at least one embodiment, the only means for controlling the fluid passage between the liquid inlet and the liquid outlet is one or more resilient flow control valves.

[0012] In at least one embodiment, the spray gun system is not configured to operate with a manually operated valve that seals the liquid passage from the atmosphere in a first mode or unseals the liquid passage to the atmosphere in a second mode.

[0013] In at least one embodiment, the manually operated valve is a globe valve, a gate valve, a spherical valve, a butterfly valve, a plug valve, a sliding valve, a needle valve, or a pinch valve.

[0014] In at least one embodiment, a resilient flow control valve is positioned proximate the liquid outlet.

[0015] In at least one embodiment, the resilient flow control valve forms part of the liquid outlet.

[0016] In at least one embodiment, the elastomeric flow control valve is configured to close when a differential pressure across the elastomeric flow control valve is less than a closing pressure of the elastomeric flow control valve.

[0017] In at least one embodiment, the elastic flow control valve opens in one direction.

[0018] In at least one embodiment, in the second mode, the downstream side of the flexible flow control valve is below atmospheric pressure.

[0019] In at least one embodiment, in the second mode, the downstream side is above atmospheric pressure.

[0020] In at least one embodiment, the pressure on the upstream side of the elastomeric flow control valve is increased by gas pressure from a compatible spray gun body or gas source.

[0021] In at least one embodiment, activation of a gas valve in the spray gun platform causes the elastomeric flow control valve to open by increasing pressure on the upstream side of the elastomeric flow control valve, which increases the differential pressure across the elastomeric flow control valve.

[0022] In at least one embodiment, the flow of gas at the mixing zone reduces the pressure on the downstream side of the elastomeric flow control valve, thereby causing the elastomeric portion to form an opening when the differential pressure is at least the opening pressure of the elastomeric flow control valve.

[0023] In at least one embodiment, the spray gun component further comprises a gas inlet and a gas outlet. A gas passage is formed between the gas inlet and the gas outlet. In at least one embodiment, the upstream side of the elastic flow control valve is fluidly isolated from the gas passage.

[0024] In at least one embodiment, a spray gun component can include a removable cover configured to form a portion of a gas passageway and / or a liquid passageway.

[0025] In at least one embodiment, the liquid passageway further comprises a retaining structure configured to engage with the resilient flow control valve. In at least one embodiment, the retaining structure comprises a rim forming an opening therein.

[0026] In at least one embodiment, the retaining structure has an upstream side and a downstream side. The downstream side of the elastic flow control valve is configured to contact the upstream side of the retaining structure.

[0027] In at least one embodiment, the spray gun component includes a baffle including a wall having an opening formed therein. The baffle can be configured to form a fluid-tight seal with the retaining structure and / or the resilient flow control valve.

[0028] In at least one embodiment, the lance component includes a tubular wall configured to form a fluid-tight seal with a retaining structure.

[0029] In at least one embodiment, the spray gun component is a nozzle assembly.

[0030] In at least one embodiment, the spray gun component may include a gas cap disposed on the spray gun component. In at least one embodiment, the spray gun component is configured to cooperate with a spray gun platform. The spray gun platform may include a second gas passage formed in the spray gun body. The spray gun component has a liquid passage formed therein. In at least one embodiment, the spray gun component includes a gas passage formed between a gas inlet and a gas outlet. The gas inlet of the spray gun component may be configured to cooperate with a gas passage in the spray gun platform. In at least one embodiment, the nozzle assembly is a nozzle barrel.

[0031] In at least one embodiment, a mixing zone is formed external to the lance assembly wherein the gas stream and liquid stream pass through their respective outlets and merge.

[0032] In at least one embodiment, the gas and liquid remain separated in their different passages until passing through their respective outlets at the mixing zone.

[0033] In at least one embodiment, the liquid passage includes a downstream liquid chamber. The retaining structure can form the downstream liquid chamber in the liquid passage. The downstream side of the elastic flow control valve can face the downstream liquid chamber. In at least one embodiment, the downstream liquid chamber includes a plurality of chamber segments that are inclined to each other. The chamber segments are coaxial with the longitudinal axis.

[0034] In at least one embodiment, the size of the downstream liquid chamber is no greater than 3 times the size of the elastomeric flow control valve.

[0035] In at least one embodiment, the gas chamber and the downstream liquid chamber are parallel to the longitudinal axis.

[0036] In at least one embodiment, the nozzle assembly includes a nozzle including a distal surface.The upstream side of the elastomeric flow control valve can be configured to engage the distal surface.

[0037] In at least one embodiment, the liquid inlet is configured to be fluidly coupled to a liquid reservoir system.

[0038] In at least one embodiment, the nozzle assembly is removable from the spray gun platform and maintains a fluid-tight seal between the atmosphere and the contents of the liquid reservoir system.

[0039] In at least one embodiment, the liquid reservoir system is configured to be pressurized in the second mode by activating the gas valve.

[0040] In at least one embodiment, the nozzle assembly includes a pressurization passage.

[0041] In at least one embodiment, the resilient flow control valve can include a frame structure and / or a resilient portion attachable to the frame structure. The frame structure can be configured to cooperate with a retaining structure.

[0042] In at least one embodiment, the openable portion is movable from an initially closed configuration to an open configuration when the resilient portion is subjected to a differential pressure of at least an opening pressure.

[0043] In at least one embodiment, the resilient portion includes at least one self-sealing opening formed therein.

[0044] In at least one embodiment, the self-sealing opening forms a slit, a cross-shaped slit, or a star-shaped pattern of slits. In at least one embodiment, the slits are non-linear.

[0045] In at least one embodiment, the elastomeric flow control valve is constructed entirely of elastomeric material contained between two or more permanently bonded components.

[0046] In at least one embodiment, the liquid passageway is rigid.

[0047] In at least one embodiment, the spray gun component can be an integrated gas cap / nozzle, wherein the liquid outlet and the gas outlet are formed in the integrated gas cap / nozzle. An elastic flow control valve can be installed with the integrated gas cap / nozzle and form a mixing zone where the liquid and gas streams interact.

[0048] In at least one embodiment, the spray gun component can be a liquid hose assembly.

[0049] In at least one embodiment, the spray gun component can be a liquid reservoir component, the liquid reservoir component comprising a nozzle, a connection structure disposed on the liquid reservoir component for attachment to a complementary connection structure (connection format) on the spray gun / platform. In at least one embodiment, the nozzle comprises a liquid inlet and a liquid outlet.

[0050] In at least one embodiment, the liquid reservoir component can be a lid configured to form a fluid-tight seal with the cup.

[0051] In at least one embodiment, the liquid reservoir component can be an adapter configured to mate with a compatible lid.

[0052] In at least one embodiment, the elastomeric flow control valve is disposed adjacent to a distal surface of the nozzle.

[0053] In at least one embodiment, aspects of the present disclosure may be directed to a spray gun including a spray gun component.

[0054] In at least one embodiment, aspects of the present disclosure may be directed to a system including a spray gun component. The system may include a spray gun platform including a spray gun body. The spray gun component is configured to be mechanically coupled to the spray gun body.

[0055] In at least one embodiment, a system can include a liquid reservoir system configured to be mechanically coupled to a spray gun component.

[0056] In at least one embodiment, the spray gun platform can include a grip portion and a gas valve operable when a user grasps the grip portion. The gas valve controls the flow of gas without manually actuating any valves within the liquid pathway.

[0057] In at least one embodiment, the spray gun platform has a top surface on which the actuator is disposed and operable by a user's thumb. A gas valve is located within the spray gun platform and is coupled to the actuator.

[0058] In at least one embodiment, the actuator is disposed on a gripping portion of the spray gun platform.

[0059] In at least one embodiment, the spray gun component is a nozzle assembly that can include a quick connect configured to mate with a complementary feature on the spray gun body.

[0060] In at least one embodiment, the nozzle assembly includes a nozzle tubular wall having a retaining feature formed therein. The spray gun body may include a tubular wall operably connected to a gas source at one end. The nozzle tubular wall may be configured to releasably mate with the tubular wall at an opposite end.

[0061] In at least one embodiment, the spray gun body can include a nozzle release mechanism that is mechanically coupled to the nozzle tubular wall.When activated, the nozzle release mechanism can allow the nozzle assembly to be removed from the spray gun body.

[0062] In at least one embodiment, aspects of the present disclosure may be directed to a kit including a resilient flow control valve configured to operate with a spray gun system.

[0063] In at least one embodiment, the kit can include spray gun components.

[0064] In at least one embodiment, the kit can include a spray gun platform, a nozzle assembly, and / or a liquid reservoir system.

[0065] In at least one embodiment, the kit can include a liquid stored in a liquid reservoir system.

[0066] In at least one embodiment, aspects of the present disclosure may relate to a method of using a spray gun component as described herein. In at least one embodiment, the spray gun component is a nozzle assembly. The method may include obtaining a spray gun system, the spray gun system including a nozzle assembly body, the nozzle assembly body having a liquid inlet and a liquid outlet forming a liquid passage and a gas inlet and a gas outlet forming a gas passage. In at least one embodiment, the liquid outlet and the gas outlet are configured to intersect at a mixing zone adjacent to the liquid outlet and the gas outlet. In at least one embodiment, the elastic flow control valve is arranged in the liquid passage in a fluid-tight manner. In at least one embodiment, the spray gun system is connected to a gas source controlled by an actuator. The method may include activating an actuator, thereby allowing gas to flow through the gas passage and the gas outlet. In response to activating the actuator, the gas flow causes a change in the differential pressure across the elastic flow control valve. In at least one embodiment, the differential pressure exceeds the opening pressure of the elastic flow control valve and thereby causes the elastic flow control valve to change to an open configuration. The method may also include deactivating the actuator, thereby reducing gas flow through the gas passage and reducing the differential pressure across the elastomeric flow control valve to no greater than a closing pressure of the elastomeric flow control valve, thereby causing the elastomeric flow control valve to change to a closed configuration.

[0067] In at least one embodiment, aspects of the present disclosure may relate to a nozzle assembly including a nozzle assembly body. The nozzle assembly body also includes a gas passage and a liquid passage formed therein. The liquid passage may be formed between a liquid inlet and a liquid outlet. In at least one embodiment, the liquid passage is configured to be fluidically connected to a liquid reservoir system configured to hold liquid, and the gas passage is configured to be fluidically connected to a gas source. In at least one embodiment, an elastic flow control valve is disposed in the liquid passage. In at least one embodiment, the elastic flow control valve has an upstream side and a downstream side. The upstream side is in fluid communication with the liquid reservoir system, and the downstream side is in fluid communication with the liquid outlet. In response to a pressure differential across the first side and the second side being at least the opening pressure of the elastic flow control valve, thereby allowing the elastic flow control valve to open, the flow of gas through the gas passage may cause the elastic flow control valve to open.

[0068] Aspects of the present disclosure are directed to a system that includes a nozzle assembly and a spray gun platform configured to mate with the nozzle assembly such that a gas passage is coupled to a second gas passage of the spray gun platform.

[0069] Aspects of the present disclosure relate to a lid for a liquid reservoir system, the lid comprising a lid body having a liquid inlet and a liquid outlet. The liquid inlet is configured to be connected to a compatible cup, and the liquid outlet is configured to be connected to a compatible spray gun system, or an adapter, or a spray gun platform. In at least one embodiment, a liquid passage is formed in the lid body and fluidically connects the liquid inlet and the liquid outlet. In at least one embodiment, an elastic flow control valve is disposed in the liquid passage. The elastic flow control valve may have a first side and a second side. In at least one embodiment, the first side is in fluid communication with the liquid inlet, and the second side is in fluid communication with the liquid outlet. In at least one embodiment, when the pressure differential across the first side and the second side equals or exceeds the opening pressure of the elastic flow control valve, the elastic flow control valve is opened by the gas flow of a compatible liquid spray gun system.

[0070] In at least one embodiment, the resilient flow control valve is positioned adjacent to the liquid outlet.

[0071] In at least one embodiment, the resilient flow control valve is positioned adjacent to the liquid inlet.

[0072] In at least one embodiment, the nozzle can form a portion of the liquid passageway.In at least one embodiment, the nozzle has an inner surface having a retaining structure disposed thereon, the retaining structure being configured to engage with the resilient flow control valve.

[0073] In at least one embodiment, the cap can include a spout forming a liquid passageway.The spout can have a distal surface having a resilient flow control valve disposed thereon.

[0074] Aspects of the present disclosure relate to a method for operating a spray gun system. The method may include obtaining a spray gun system, the spray gun system including a nozzle assembly body having a liquid inlet and a liquid outlet forming a liquid passage and a gas inlet and a gas outlet forming a gas passage. In at least one embodiment, the liquid outlet and the gas outlet are configured to intersect at a mixing zone adjacent to the liquid outlet and the gas outlet. In at least one embodiment, an elastic flow control valve is disposed in the liquid passage in a fluid-tight manner. In at least one embodiment, the spray gun system is coupled to a gas source controlled by an actuator. The method may include activating an actuator to allow gas to flow through the gas passage and the gas outlet. In response to activating the actuator, the gas flow causes a change in the differential pressure across the elastic flow control valve. In at least one embodiment, the differential pressure exceeds the opening pressure of the elastic flow control valve and thereby causes the elastic flow control valve to change to an open configuration. The method may also include deactivating the actuator, thereby reducing the gas flow through the gas passage, and reducing the differential pressure across the elastic flow control valve to no greater than the closing pressure of the elastic flow control valve, thereby causing the elastic flow control valve to change to a closed configuration.

[0075] In at least one embodiment, the method may include assembling the spray gun system by attaching the nozzle assembly body to the spray gun platform. In at least one embodiment, the spray gun platform includes a second gas passage coupled to the gas passage in the nozzle assembly body. In at least one embodiment, the liquid passage in the nozzle assembly body is separate from the gas passage and the second gas passage.

[0076] In at least one embodiment, the nozzle assembly body can include a nozzle barrel.

[0077] In at least one embodiment, the method can include disassembling the spray gun system by removing the nozzle assembly body from the spray gun platform.

[0078] Aspects of the present disclosure are directed to a spray gun system including spray gun components configured to perform the above-described method. BRIEF DESCRIPTION OF THE DRAWINGS

[0079] To easily identify the discussion of any particular element or act, the most significant digit(s) in a reference number refers to the figure numeral that first introduces that element.

[0080] Figure 1 A cross-sectional side view of a prior art spray gun is illustrated according to one embodiment.

[0081] Figure 2 Illustrated Figure 1 A cross-sectional side view of a portion of a showerhead assembly in which selected portions have been removed to more clearly illustrate certain features.

[0082] Figure 3 A block diagram of a spray gun system having a flexible flow control valve according to one embodiment is illustrated.

[0083] Figure 4A A side view of a spray gun system having spray gun components according to one embodiment is illustrated.

[0084] Figure 4B A detailed cross-sectional side view of a spray gun system 400 is illustrated according to one embodiment.

[0085] Figure 4C An example is given according to an embodiment Figure 4A and Figure 4B Another enhanced cross-sectional side view of the spray gun system at an oblique angle.

[0086] Figure 5A A cross-sectional view of a resilient flow control valve 432 in a closed configuration is illustrated according to one embodiment.

[0087] Figure 5B A cross-sectional view of a resilient flow control valve 432 in an open configuration is illustrated according to one embodiment.

[0088] Figure 6 Illustrated is a diagram of a hand-held device according to an embodiment. FIG. 4A to FIG. 4C system.

[0089] Fig. 7A A nozzle assembly according to one embodiment is illustrated having an integrated cover as part of a liquid reservoir system.

[0090] Figure 7B An example is given according to an embodiment Fig. 7A A cross-sectional view of a nozzle assembly.

[0091] Figure 8 An integrated nozzle assembly and liquid reservoir system according to one embodiment is illustrated.

[0092] Fig. 9 A cross-sectional side view of a nozzle assembly with a downstream baffle is illustrated according to one embodiment.

[0093] Fig.10 A cross-sectional side view of a nozzle assembly with an upstream baffle is illustrated according to one embodiment.

[0094] Fig.11 A perspective view of a nozzle assembly with a liquid reservoir system according to one embodiment is illustrated.

[0095] Fig.12A perspective view of a system according to one embodiment is illustrated.

[0096] Fig.13A A perspective view of a nozzle assembly according to one embodiment is illustrated.

[0097] Fig. 13B An example is given according to an embodiment Fig.13A A cross-sectional side view of a portion of a nozzle assembly.

[0098] Fig. 13C An example is given according to an embodiment Fig. 13B A cross-sectional side view of a portion of a nozzle assembly.

[0099] Fig.14A A cross-sectional side view of a portion of a nozzle assembly according to one embodiment is illustrated.

[0100] Fig. 14B An example is given according to an embodiment Fig.14A A cross-sectional side view of a portion of a nozzle assembly.

[0101] Fig.15A A cross-sectional side view of a nozzle assembly and integrated air cap / nozzle is illustrated according to one embodiment.

[0102] Fig. 15B An example is given according to an embodiment Fig.15A An enhanced cross-sectional side view of a portion of a nozzle assembly.

[0103] Fig. 15C An example is given according to an embodiment Fig.15A and Fig. 15B Rear perspective view of the integrated air cap / nozzle.

[0104] Fig.16A A perspective view of a nozzle assembly according to one embodiment is illustrated.

[0105] Fig. 16B An example is given according to an embodiment Fig.16A Exploded view of the nozzle assembly.

[0106] Fig. 16C An example is given according to an embodiment Fig.16A Bottom cross-sectional view of the nozzle assembly.

[0107] Fig.17A A perspective view of a cover according to one embodiment is illustrated.

[0108] Fig. 17B According to an implementation scheme Fig.17A Top elevation view of the lid.

[0109] Fig. 17C An example is given according to an embodiment Fig.17A and Fig. 17B Side cross-sectional view of the lid.

[0110] Fig.18A A perspective view of a cover according to one embodiment is illustrated.

[0111] Fig.18B An example is given according to an embodiment Fig.18A Side cross-sectional view of the lid.

[0112] Fig.18C An example is given according to an embodiment Fig.18B Enhanced side cross-sectional view of the lid.

[0113] Fig.19A A perspective view of an integrated cap / nozzle according to one embodiment is illustrated.

[0114] Fig.19B An example is given according to an embodiment Fig.19A Top cross-sectional view of the nozzle of the cover.

[0115] Fig.19C An example is given according to an embodiment Fig.19A Side cross-sectional view of the lid.

[0116] Fig. 20A A perspective view of a liquid hose assembly according to one embodiment is illustrated.

[0117] Fig. 20B An example is given according to an embodiment Fig. 20A Side cross-sectional view of a liquid hose assembly. DETAILED DESCRIPTION

[0118] The spray equipment of the present disclosure can allow a user to generate a spray of atomized liquid for a variety of coating applications. Such coating applications can be performed to improve the appearance of a substrate, impart corrosion resistance to a substrate, impart wear resistance to a substrate, improve moisture resistance to a substrate, and improve cleanability of a substrate.

[0119] Aspects of the present disclosure relate to spray equipment that uses an elastic flow control valve within a liquid passage formed therein to control the delivery of a liquid without using a manually operated valve, such as a needle valve actuated by a trigger or actuator. The elastic portion of the elastic flow control valve has the ability to adjust its opening behavior based on changes in differential pressure and possesses inherent elasticity to remain in a normally closed configuration once a predetermined differential pressure is reached.

[0120] The resilient portion used in the present disclosure is preferably made of a resilient, elastic and flexible material. Such materials are selected to give the valve the ability to recover its original shape after being deformed (i.e., bent, stretched, compressed, etc.) in use. These materials may include, but are not limited to, natural and synthetic rubbers (EPDM, silicone rubber, etc.), thermoplastic polymers (LDPE, polypropylene, etc.), elastomers, thermosetting polymers and thermoplastic elastomers (including thermoplastic vulcanizates, thermoplastic polyurethanes, thermoplastic copolyesters, thermoplastic polyamides, etc.).

[0121] The shape and / or deformation of the elastic portion is affected by the surrounding fluid. Therefore, it is important to describe how this process can occur. The elastic portion can be understood as having two "sides" and describing their orientation relative to the fluid flow. The upstream side (e.g., Figure 5A The upstream side 468a in the embodiment faces the liquid inlet and has a fluid pressure (P1) acting thereon from the liquid. The downstream side (e.g., Figure 5A The downstream side 468b in the valve faces the liquid outlet and also has a fluid pressure (P2) acting on it. These fluid pressures may be independent of any internal or residual stresses designed into the valve itself. It should be understood that the shape of the valve may be affected by the difference in fluid pressure between its upstream and downstream sides. This gives rise to the concept of differential pressure across the valve. A positive differential pressure indicates that the average upstream fluid pressure is greater than the average downstream fluid pressure. A negative differential pressure indicates that the average upstream fluid pressure is less than the average downstream pressure.

[0122] In the first mode, the resilient portion will be able to seal / close in a closed configuration so that liquid does not flow through the resilient portion. In the first mode, the resilient portion may be configured to remain closed under a closing pressure. The resilient portion may be inherently self-sealing, or the sealing may be achieved / assisted by a specified differential pressure.

[0123] By adjusting the fluid conditions around the elastic portion, thereby changing the differential pressure, the valve can be deformed from its closed configuration (in a first operating mode of the spray gun system) to an open configuration (e.g., in a Figure 5B The second operating mode of the spray gun system illustrated in the drawings) allows the opening to overcome the opening pressure and allow liquid to flow through the valve. The resilient portion may include an attachment structure configured to seal against a component of the resilient flow control valve and / or a nozzle assembly wall.

[0124] The disclosed spray equipment can reduce the number of parts, complexity, cost, eliminate the need for precision machined needles and seals used in spray equipment, achieve a nozzle design that can be more easily removed from the spray equipment, and achieve a nozzle design that keeps the paint reservoir sealed from the atmosphere even when disconnected from the spray equipment. This approach is different in that it does not require a precision machined needle, precision machined valve seat, packing seals, nor a needle spring as is typically found in prior art spray equipment.

[0125] Additional aspects of the present disclosure relate to positioning a resilient flow control valve adjacent to the liquid outlet. This configuration can further reduce the amount of liquid retained by the nozzle assembly and improve the cleanliness of the nozzle assembly.

[0126] Although the spray equipment of the present disclosure is designed to address some of the shortcomings associated with current manual, handheld spray guns as described above, it should be understood that the spray equipment disclosed herein may be readily configured for other devices and / or applications for atomizing liquids without departing from the scope of the present disclosure.

[0127] Figure 1 and Figure 2 A spray gun system 100 is illustrated. The spray gun system 100 includes a body 102 and a nozzle assembly 104. The body 102 includes a gas inlet 106 configured to be coupled to a gas source (not shown). The body 102 may also include a grip portion 112, a trigger 114, and a liquid inlet 116 for connecting to a compatible liquid reservoir system (not shown).

[0128] The nozzle assembly 104 may include a retaining mechanism 118, an air cap 126, and a nozzle 120. The air cap 126 may include an annular opening 204 and two or more diametrically opposed air horns 128 containing horn passages 130 terminating at horn outlets 132. Although the air horns 128 and air cap 126 are used to describe the configuration, various other gases and / or carrier fluids other than air may be used.

[0129] The nozzle 120 may include a liquid outlet 122 sealed with a needle tip 136 that interacts with a needle seat formed in a tapered region 206 of a nozzle wall 208. The nozzle 120 may also include attachment structure for attaching to the body 102 and forming a releasable connection.

[0130] To operate the spray gun system 100, the user's hand depresses the trigger 114, which actuates the valve 134 and causes the needle valve 138 to retract (via the needle protrusion 140 and the biasing mechanism engagement structure 144) away from the nozzle 120 along the spray axis 124. Actuation of the valve 134 allows gas to flow from the gas inlet 106 through the valve 134 and into the shaping gas passage 110 and the atomizing gas passage 108.

[0131] The atomizing gas passage 108 and the shaping gas passage 110 may be fluidly coupled to the atomizing gas passage 210 and the horn passage 130, respectively. Gas from the atomizing gas passage 210 may flow along the exterior of the nozzle wall 208 and through the annular opening 204 (i.e., forming the gas outlet), thereby creating a venturi effect that draws liquid from the liquid reservoir system through the liquid inlet 116 and the liquid passage 202 until the liquid exits the nozzle 120 at the liquid outlet 122, where the gas atomizes the liquid at the mixing zone 212. In some embodiments, the liquid reservoir system may benefit from gravity and / or pressure assistance. For example, the liquid reservoir system may be pressure assisted, which may allow for the handling of viscous liquids.

[0132] The mixing zone 212 is where the gas flow from the atomizing gas passage 210 exiting the annular opening 204 merges, interacts, intersects, and / or atomizes the liquid flow from the liquid passage 202 exiting the liquid outlet 122. The gas may exit the horn passage 130 at the horn outlet 132 to shape the atomized liquid, thereby producing an approximately elliptical spray pattern.

[0133] When the trigger 114 is released, a biasing mechanism (such as a spring) can bias the needle valve 138 to a closed position, which cuts off the flow of liquid. The needle valve 138 can also cooperate with the packing seal 142 to form a fluid-tight seal between the body 102 and the liquid passage 202. Over time, the packing seal 142 may wear and thus may be replaced.

[0134] In at least one embodiment, the spray gun system 100 can include a body 102 having both a liquid passage 202 and an atomizing gas passage 210 formed therein. Thus, to clean the spray gun system 100, the gas cap 126 and the nozzle 120 are removed.

[0135] Figure 3A functional block diagram of a spray gun system 300 according to aspects of the present disclosure is illustrated. The spray gun system 300 may include a spray gun platform 302, a nozzle assembly 304, a liquid reservoir system 306 having a liquid reservoir outlet 308 and containing a liquid, and a gas source 324 having a gas 322. The liquid reservoir system 306 may include any suitable container, reservoir, or housing that can be directly or indirectly (e.g., via a conduit, a hose, an aerosol can, etc.) attached to a liquid inlet 314 of the nozzle assembly 304. In at least one embodiment, the liquid inlet 314 refers to a functional inlet that can cooperate with the liquid reservoir outlet 308 and can be located within the body of the nozzle assembly 304. In at least one embodiment, the spray gun platform 302, the nozzle assembly 304, and the liquid reservoir system 306 (including its liquid reservoir components) can be referred to as spray gun components. The nozzle assembly 304 and the liquid reservoir system 306 can be further configured to be attached to the spray gun platform 302.

[0136] The liquid reservoir system 306 including the liquid reservoir outlet 308 can be reusable or disposable and can be pre-filled with liquid or can be filled on site. The liquid reservoir system 306 can optionally have a removable cover portion to assist in opening and closing the container. In at least one embodiment, the liquid reservoir system 306 can include a liquid reservoir component, such as a gravity-fed liquid reservoir system, which includes a cover, an adapter, or a portion thereof. In at least one embodiment, the liquid reservoir outlet 308 can flow into the liquid inlet 314 in the spray gun system 300 and flow out of the liquid outlet 316. The liquid inlet 314 and the liquid outlet 316 can be formed by openings in the various components of the spray gun system 300. The liquid inlet 314 and the liquid outlet 316 can be connected via a liquid passage 312.

[0137] The gas source 324 can be fluidly isolated from the atmosphere (i.e., a closed vessel) or contain a fluid inlet to allow for the intake of gas 322 from the surrounding environment (i.e., an air compressor). In at least one embodiment, the gas 322 from the gas source 324 can flow into the nozzle gas inlet 326 and out of the spray gun system 300 via the gas outlet 330. The nozzle gas inlet 326 and the gas outlet 330 can be connected via a gas passage 328.

[0138] In some embodiments, at least one of the gas source 324 and the liquid reservoir system 306 is pressurized. In some embodiments, the gas source 324 is pressurized. In some embodiments, the liquid reservoir system 306 is not pressurized. In other embodiments, the liquid reservoir system 306 is not pressurized by means other than hydrostatic pressure (e.g., the liquid reservoir system 306 is vertically positioned above the nozzle assembly 304 in a gravity-fed configuration).

[0139] In at least one embodiment, the spray gun system 300 can have a liquid reservoir system 306 fluidly connected to a flexible flow control valve 318a. Figure 3 As depicted, the flexible flow control valve may be positioned at a variety of locations along the liquid flow path from the liquid reservoir system 306 to the mixing zone 310 (e.g., 318a, 318b, 318c all refer to potential locations for the flexible flow control valve). The term flexible flow control valve 318a may be used interchangeably with flexible flow control valve 318b and flexible flow control valve 318c.

[0140] In at least one embodiment, the elastomeric flow control valve 318a can be positioned so that a sufficient pressure differential can be generated and controlled at that location during operation of the spray gun system 300 (e.g., sufficient to change the elastomeric flow control valve 318a to an open configuration). In at least one embodiment, the elastomeric flow control valve 318a is located within the liquid passage 312 of the nozzle assembly 304. The location of the elastomeric flow control valve 318a within the liquid passage 312 can depend on several factors, including the size and shape of both the valve and the passage, the desire to have an expansion chamber within the liquid passage, and any considerations regarding residual liquid present within the liquid passage when the elastomeric flow control valve 318a is closed. In at least one embodiment, the elastomeric flow control valve 318a can be positioned in the middle of the liquid passage 312. In at least one embodiment, the elastomeric flow control valve 318a is located at the liquid outlet of the liquid passage 312 such that the outlet of the elastomeric flow control valve 318a is adjacent to the mixing zone 310.

[0141] In another embodiment, the elastomeric flow control valve 318c is located within the liquid reservoir system 306, such as in the liquid reservoir outlet 308 or a cap of the liquid reservoir system 306. In at least one embodiment, the elastomeric flow control valve 318b can be located within a conduit connecting the liquid reservoir system 306 to the nozzle assembly 304. From the examples given, it should be understood that a variety of locations are acceptable for the placement of the elastomeric flow control valve.

[0142] In at least one embodiment, two or more elastomeric flow control valves can be used within the same spray gun system 300. The use of more than one elastomeric flow control valve can provide a backup in the event that another elastomeric flow control valve fails. Additionally, the use of two or more elastomeric flow control valves can allow the separable components to remain sealed to the air when disconnected. In at least one embodiment, the elastomeric flow control valve 318a is located at the liquid inlet 314 to the nozzle assembly 304, while another elastomeric flow control valve 318c is located within the lid of the liquid reservoir system. When the liquid reservoir system is disconnected from the nozzle assembly, both components can remain sealed to the atmosphere.

[0143] The spray gun system 300 may include a gas valve 320 placed between a gas source 324 and a nozzle gas passage 328 to manage gas flow within the spray gun system 300. Exemplary gas valves 320 include poppet valves, ball valves, pinch valves, diaphragm valves, and needle valves commonly used in pneumatic applications. In at least one embodiment, the gas valve 320 may be placed within the spray gun system 300 such that the gas valve (indirectly) affects the degree of opening of at least one elastic flow control valve 318a. The indirect fluid communication path may extend across distinct channels (i.e., nozzle gas passage 328 to mixing zone 310 to liquid passage 312), across distinct fluids (i.e., pressure transferred between gas and liquid), or also across (deformable) partitions separating channels.

[0144] The operation of the spray gun system 300 of the present application can be described by a series of events. In a first state, the spray gun system 300 can contain liquid in the liquid reservoir system 306 and gas in the gas source 324. In this state, both the gas valve 320 and the elastic flow control valve 318a are in a closed position. Since both valves are closed, no gas or liquid flows through the spray gun system 300.

[0145] In the first mode, the gas valve 320 may be opened, which allows gas to flow from the gas source 324 through the gas valve 320. The flow of gas in the system changes the differential pressure across the flexible flow control valve 318a via the fluid coupling mechanism previously described. In the first mode, even if the gas is flowing, the differential pressure may not be sufficient to change the flexible flow control valve 318a from the closed configuration. In the second mode, under certain gas flow conditions, a predefined opening differential pressure of the flexible flow control valve 318a may be reached, thereby causing the flexible flow control valve 318a to change to an open configuration, thereby enabling liquid to pass through the liquid passage 312 (if the optional liquid is present). As both the gas and liquid pass through their respective channels, the two fluids are directed to the mixing zone 310.

[0146] Atomization and spray formation processes may occur in the second state within the mixing zone 310. The atomization and spray formation processes may result in the generation of a spray comprising a mixture of at least two fluids (gas 322 and liquid), wherein the liquid has been atomized into small droplets from its initial bulk fluid state.

[0147] When it is desired to reduce or stop the spray emitted from the spray gun system 300, the gas valve 320 can be partially or completely closed. By closing the gas valve 320 (e.g., by a user interacting with an actuator), the flow of gas through the spray gun system 300 can be stopped, and the differential pressure across the flexible flow control valve 318a can be reduced. When the specified closing differential pressure of the flexible flow control valve 318a is reached, the flexible flow control valve 318a can seal itself and stop the flow of liquid through the liquid passage 312. This closing process returns the spray gun system 300 to the first state.

[0148] Figure 4A , Figure 4B and Figure 4C A spray gun system 400 is depicted. In at least one embodiment, the spray gun system 400 can be similar to the spray gun system 100. The spray gun system 400 can include a spray gun platform 402, a nozzle assembly 412, and a liquid reservoir system 428. Each of the aforementioned spray gun components can be releasably attached to each other. In at least one embodiment, at least some of the components of 400 can be integrally formed.

[0149] Aspects of the present disclosure may also be directed to an integrated system.For example, a pouch having a liquid 472 contained therein (ie, a liquid reservoir system) may have a nozzle assembly fixedly coupled to the pouch.

[0150] Although gases and liquids are mentioned throughout the specification, aspects of the present disclosure may also involve multiple fluids.For example, a third fluid may be introduced into the liquid chamber of the nozzle assembly 412 to act as a catalyst.

[0151] In at least one embodiment, the spray gun platform 402 can include a spray gun body 404 that can be formed from a variety of polymer, metal, or ceramic materials. Various internal gas passages can be formed within the spray gun body 404, connecting a gas source to the gas outlet 488. The spray gun body 404 can include a grip portion 406 for handheld gripping of the spray gun platform 402. As shown, the spray gun platform 402 can include a pistol grip.

[0152] The spray gun platform 402 can include a grip axis 450 and a longitudinal axis 448. The grip axis 450 can be formed by the grip portion 406.

[0153] The longitudinal axis 448 of the spray gun system 400 can be formed according to the direction of the liquid spray. For example, the spray gun platform 402 can have a first end 454 defined by the liquid outlet and a second end 456 defined by the nozzle gas inlet 490 and / or the gas passage 426. In at least one embodiment, the longitudinal axis 448 can extend from the liquid outlet 416 to the second end 456. The longitudinal axis 448 can also be defined by a portion of the gas passage, the liquid passage, or a combination thereof.

[0154] In at least one embodiment, the longitudinal plane can be formed from both the longitudinal axis 448 and the gripping axis 450. The transverse plane can be orthogonal to the longitudinal plane. Both the longitudinal plane and the transverse plane can intersect the longitudinal axis. In at least one embodiment, the longitudinal axis 448 and the gripping axis 450 can form an angle 496 of at least 90 degrees. The angle 496 is measured from the point where the user's index finger will grasp the gripping axis (e.g., Figure 6 shown).

[0155] In at least one embodiment, portions of the liquid reservoir system 428, the liquid passage 452, and the liquid outlet 416 can intersect the longitudinal plane. In one embodiment, the spray gun platform 402 includes a grip portion 406 and an actuator 408 that is typically accessible via one or more of a user's fingers or a thumb when gripping the grip portion 406 and that opens a gas valve (not shown) to allow gas to flow along a gas passage within the spray gun platform 402 when the actuator 408 is actuated. In at least one embodiment, the actuator 408 can be positioned on a top surface 464 of the spray gun platform 402 so that the actuator can be operated by a user's thumb, such as Figure 6 shown.

[0156] The spray gun body 404 may also include a nozzle retaining mechanism 484 that is mechanically coupled to the nozzle release mechanism 410. The nozzle retaining mechanism 484 may be configured to engage with a retaining structure 482 (shown as an annular recessed ring formed in the tubular wall 436) of the nozzle assembly 412. The nozzle release mechanism 410 may be configured to release the nozzle assembly 412 when the nozzle release mechanism 410 is activated. For example, the spray gun body 404 may have an outer shell 470 and an inner tubular wall 458. In at least one embodiment, the tubular wall 458 may form a chamber 446 in the gas passage 426 for the spray gun body 404. The tubular wall 458 may also have a retaining structure 420 formed or assembled therein. In at least one embodiment, the nozzle assembly 412 and the liquid reservoir system 428 may be removed from the spray gun body 404 as a single unit.

[0157] The nozzle assembly 412 may have a nozzle assembly body 414 and a resilient flow control valve 432 .

[0158] In at least one embodiment, the nozzle assembly body 414 is configured to cooperate with the spray gun body 404. In at least one embodiment, the nozzle assembly body 414 can be integrally formed by a single piece. In other embodiments, one or more components are combined to form the nozzle assembly body 414. The nozzle assembly body 414 may have a retaining structure 482 configured to cooperate with the nozzle retaining mechanism 484. For example, the tubular wall 436 may have a retaining structure 482 in a concave form, which is engaged with the spray gun body 404 in a push-fit connection. The nozzle retaining mechanism 484 can be mechanically coupled to the nozzle release mechanism 410, which is shown as a depressible button. In at least one embodiment, the nozzle release mechanism 410 is actuated along a plane transverse to the injection direction. In some embodiments, a compliant seal is included as a part of the tubular wall 458 or the tubular wall 436 to produce a fluid-tight seal between the tubular wall 458 and the tubular wall 436.

[0159] In at least one embodiment, the gas passage 426 can be formed by an internal fluid passage of the nozzle assembly body 414 and / or the spray gun body 404. For example, the gas passage 426 can be formed by the tubular wall 458 and the tubular wall 436. The gas passage 426 of the nozzle assembly 412 can be formed between the nozzle gas inlet 490 (which is configured to receive gas from the gas outlet 488 of the spray gun platform 402, which is received from the gas source 492) and terminate at the gas outlet 462 formed by the tubular wall 436. The gas outlet 462 can have a smaller cross-sectional area (measured orthogonal to the longitudinal axis 448) than the through-hole area formed by the tubular wall 436.

[0160] The gas may flow through the nozzle gas inlet 490 via the gas passage 426, flow through the protrusion 442, flow out through the gas outlet 462 formed by the tubular wall 436 and / or the dividing wall 440, and flow out through the shelf 474 into the mixing zone 476. In at least one embodiment, the nozzle assembly 412 can be an external mixing nozzle having a mixing zone 476 adjacent to the shelf 474. Various aspects of the present disclosure may relate to an internal mixing nozzle, in which the gas and liquid interact within one of the passages. The internal mixing nozzle includes a spacing distance between the gas outlet 462 and the liquid outlet 416. For example, the liquid outlet 416 may be located further upstream of the gas outlet 462 in the internal mixing nozzle.

[0161] In at least one embodiment, protrusions 442 within gas passage 426 can be used to provide turbulence and improve spray performance of spray gun platform 402. In at least one embodiment, protrusions 442 are optional and gas passage 426 can be a featureless surface that does not include protrusions 442.

[0162] The gas chamber 444 may be formed by an internal dividing wall 440, which may separate the gas chamber 444 from the downstream liquid chamber 418, and / or a tubular wall 436, which may separate the gas chamber 444 from the exterior of the nozzle assembly 412. In at least one embodiment, the dividing wall 440 may be considered to be a portion of the tubular wall 436 defining the gas passage 426 and / or a portion of the liquid passage 452.

[0163] The spray gun system 400 can include a liquid reservoir system 428 configured to hold a liquid 472. As shown, the liquid reservoir system 428 can be configured to be removably coupled to the nozzle assembly 412 via a connection structure 478 on the cover 480. The connection between the nozzle assembly 412 and the liquid reservoir system 428 can be fluid-tight.

[0164] Figure 4A An exemplary liquid reservoir system 428 is illustrated that is connected to the nozzle assembly 412 via a connection structure 478. Both the liquid reservoir system 428 and the nozzle assembly 412 may have their own connection structures. For example, the nozzle assembly 412 may have a first connection structure at one end, and the cap 480 of the liquid reservoir system 428 may have a second connection structure. Examples of connection structures 478 and liquid reservoir systems 428 can be found commercially from 3M (Saint Paul, MN) under the trade name PPS. Although a gravity-fed liquid reservoir system 428 is shown, a pressure-fed liquid reservoir system 428 is also possible. Examples of possible connection structures 478 may include twist locks, threaded connectors, push-fit connectors, snap-fit ​​connectors, or combinations thereof.

[0165] In at least one embodiment, the liquid 472 in the liquid reservoir system 428 can be fluidly connected to the liquid passage 452 in the nozzle assembly 412. The liquid 472 contained in the liquid reservoir system 428 can flow into the liquid passage 452 (e.g., by gravity feed operation or by pressure feed operation). In at least one embodiment, the liquid passage 452 in the nozzle assembly 412 is formed between the liquid inlet 494 (formed by the opening formed by the tubular wall 438) and the liquid outlet 416 of the nozzle assembly 412. The liquid passage 452 can include (1) a liquid chamber 430 (e.g., which forms a portion of the liquid passage 452) that holds the liquid as it leaves the liquid reservoir system 428 and (2) a downstream liquid chamber 418.

[0166] Liquid chamber 430 may open to elastomeric flow control valve 432. Thus, upstream side 468a of elastomeric flow control valve 432 may be in contact with liquid 472 and / or fluidly coupled to liquid inlet 494, and downstream side 468b may be in contact with atmosphere and fluidly coupled to liquid outlet 416.

[0167] Flexible flow control valve 432 Figure 5A and Figure 5B Described in more detail in .

[0168] The nozzle assembly 412 may include a retaining structure 420 disposed in the liquid passage 452. In at least one embodiment, the retaining structure 420 may include a flange, a lip, a rest, a protrusion, or a detent. In at least one embodiment, the retaining structure 420 may be capable of being pushed into a fit with the elastic flow control valve 432. The retaining structure 420 may protrude radially and / or inwardly from the sidewall of the liquid passage 452. As shown, the retaining structure 420 may include a flange 422 and an edge 424 away from the flange 422. The retaining structure 420 may have an upstream side 486a and a downstream side 486b.

[0169] In at least one embodiment, the rim 424 can be annular and have a diameter narrower than the diameter of the liquid passage 452. The rim 424 can form an opening in the nozzle assembly 412 that leads to the downstream liquid chamber 418 or at least divides the liquid passage 452 into two sections. In at least one embodiment, the elastic flow control valve 432 can be positioned adjacent to the rim 424 and potentially supported by the flange 422. Thus, the elastic flow control valve 432 can be disposed within the liquid passage 452. In at least one embodiment, the downstream side 468b of the elastic flow control valve 432 can contact the upstream side of the flange 422.

[0170] When the elastomeric flow control valve 432 is placed in the nozzle assembly 412, the elastomeric flow control valve 432 can form a fluid-tight seal within the liquid passage 452 and / or between the liquid chamber 430 and the downstream liquid chamber 418. In at least one embodiment, the elastomeric flow control valve 432 can also form a fluid-tight seal with the retaining structure 420 such that an available path for the liquid 472 passes through the elastomeric flow control valve 432 without passing through any gaps between the tubular wall 438 and the elastomeric flow control valve 432.

[0171] In at least one embodiment, the elastomeric flow control valve 432 can be further secured to the retaining structure 420 using adhesive, ultrasonic welding, overmolding, spin welding, or other attachment mechanisms. In at least one embodiment, the edges of the elastomeric flow control valve 432 (e.g., downstream side 468b) and / or the complementary retaining structure 420 (e.g., on the upstream side) can have adhesive disposed therein to facilitate bonding of the two components.

[0172] In at least one embodiment, the downstream liquid chamber 418 can be optional. For example, the elastomeric flow control valve 432 can abut or form the liquid outlet 416. For example, the outer diameter of the elastomeric flow control valve 432 can abut the tubular wall 438. In at least one embodiment, the downstream liquid chamber 418 can have a dimension 466 measured from the center of the opening 434 to any portion of the liquid outlet 416 (along the liquid passage) that is no greater than the dimension of the elastomeric flow control valve 432 (e.g., Figure 5A twice the maximum diameter measurement of the frame structure 506 shown).

[0173] The tubular wall 438 may have a tapered region 460 that leads to and forms the liquid outlet 416. In at least one embodiment, the liquid outlet 416 is formed by the distal end of the tubular wall 438 and the dividing wall 440. In at least one embodiment, the downstream liquid chamber 418 may include different chamber sections oriented orthogonal to the longitudinal axis 448 to form an L-shape. In at least one embodiment, the liquid passage 452 is approximately linear. In at least one other embodiment, the liquid passage 452 forms a plurality of curves.

[0174] The elastomeric flow control valve 432 can be configured such that in the first mode of the spray gun system 400, the differential pressure across the elastomeric flow control valve 432 can be less than the opening pressure of the elastomeric flow control valve 432 and cause the elastomeric flow control valve 432 to be in a closed configuration. Thus, an insignificant pressure differential is generated at the downstream side 468b and no liquid is dispensed. The elastomeric flow control valve 432 can be configured such that in the second mode, a large amount of gas flow can exit from the gas outlet 462, which generates a differential pressure of at least the opening pressure of the elastomeric flow control valve 432.

[0175] In response to the differential pressure being at least the opening pressure of the elastomeric flow control valve 432, the elastomeric flow control valve 432 may thus change to an open configuration, thereby forming an opening 434. The opening 434 of the elastomeric flow control valve 432 allows liquid to flow from the gas passage 426 through the opening 434, into a chamber (e.g., the downstream liquid chamber 418) or directly into the mixing zone 476 (which is adjacent to the shelf 474 and / or the liquid outlet 416), wherein the gas may atomize the liquid at the mixing zone 476.

[0176] The elastic flow control valve 432 can be positioned at a plurality of locations along the liquid flow path (e.g., liquid passage 452) as discussed herein so that a sufficient pressure differential can be generated and controlled at the location. In at least one embodiment, the elastic flow control valve 432 is located in the middle of the nozzle, such as Figure 4B shown.

[0177] Figure 5A and Figure 5BA cross-sectional view of the flexible flow control valve 432 is illustrated. Figure 5A The flexible flow control valve 432 is illustrated in a first mode, and Figure 5B The elastic flow control valve 432 is illustrated in the second mode.

[0178] The elastic flow control valve 432 is known in the art and is referred to in a variety of ways, including elastic valves, elastic closure members, discharge valve members, deformable outlet valves, dispensing closures, valve-controlled dispensing closures, elastomeric valves, double slit valves, and duckbill valves (not all of which are exhaustive). Examples of such valves may include, but are not limited to, EP3,280,652B1, US5,839,1112, US1,739,871, US5,676,289, and US 6,053,194. For example, applications for such valves include food and beverage containers, powder, lotion, and soap dispensers, and manual pump spray bottles.

[0179] In at least one embodiment, the elastomeric flow control valve 432 includes at least a resilient portion 504, and optionally a frame structure 506 and / or a support portion 502. The components of the elastomeric flow control valve 432 can be formed from separate and distinct materials, each with their own properties.

[0180] The frame structure 506 may have a structure configured to cooperate with the retaining structure of the nozzle assembly. The frame structure 506 may be relatively more rigid (e.g., as measured using the Shore A hardness test method) than the elastic portion 504. For example, the frame structure 506 may be rigid, while the elastic portion 504 is elastomeric. The frame structure 506 may be configured to be combined with both the elastic portion 504 and the support portion 502. The frame structure 506 may include various attachment features that facilitate mechanical engagement with the nozzle assembly or other components of the elastic flow control valve 432. For example, the frame structure 506 may include barbs 514 to secure the elastic portion 504 via the support portion 502.

[0181] In at least one embodiment, the frame structure 506 can be annular so that each portion of the frame structure 506 is equidistant from the center of the opening 434. By having the frame structure 506, the edge of the elastic portion 504 can be anchored within the liquid passage 452, and the position of the elastic portion 504 can be maintained at any differential pressure. In addition, by separating the frame structure 506 from the elastic portion 504, the nozzle assembly can be customized according to the application by replacing the elastic flow control valve 432.

[0182] In at least one embodiment, the support portion 502 can be a component that acts as an intermediary between the elastic portion 504 and the frame structure 506. Figure 5AAs shown, the support portion 502 is also configured to direct liquid toward the resilient portion 504 .

[0183] In at least one embodiment, the support portion 502 can be formed of a more rigid material than the resilient portion 504. In at least one embodiment, the support portion 502 can be configured to facilitate the bonding of the resilient portion 504 to the frame structure 506 and / or dissipate forces from the resilient portion 504. The support portion 502 can have features that assist in the retention and / or force dissipation of the resilient portion 504 relative to the frame structure 506. For example, the support portion 502 can include a complementary feature configured to mate with a barb 514 on the frame structure, and another complementary feature configured to mate with an attachment structure 516 on the resilient portion 504. In at least one embodiment, the support portion 502 or the frame structure 506 can have a rim 518 on a distal surface opposite the direction of the opening 434. In at least one embodiment, the rim 518 can have an outer diameter that is larger than the outer diameter of the frame structure 506 (e.g., measured in a plane orthogonal to the resilient flow control valve axis 510).

[0184] The elastic part can be designed to have a predefined opening differential pressure (e.g., opening pressure), which means when the valve deformation changes from the first mode to the second mode. The change in the opening degree or the opening cross-sectional area of ​​the elastic part can be further controlled by the magnitude of the differential pressure. This provides a certain degree of flow control, because the elastic flow control valve has many possible deformable states between the closed configuration and the open configuration. Another important feature of the elastic part is that the elastic part can return to the first mode when the differential pressure stimulus is removed. The closing differential pressure can be designed into the valve or as a characteristic of the valve, which describes when the valve will be changed back to the first mode from the second mode. In at least one embodiment, various aspects of the elastic part can be responsive to the negative differential pressure across the elastic part 504 to distribute liquid.

[0185] The elastic portion 504 may have a self-sealing opening 434 formed by one or more slits 520 therein. When in a closed configuration, one or more slits 520 may touch each other and form a fluid-tight seal. One or more slits 520 may be features that allow the elastic portion 504 to form an opening 434 when the elastic portion 504 is in an open configuration and in response to an opening pressure. In at least one embodiment, one or more slits 520 may be horizontal, vertical, combined, or even cross and star-shaped. One or more slits 520 may have a first slit size 512 that may be designed so that when a target pressure differential is achieved from the upstream side 468a to the downstream side 468b, an expected liquid 472 will be dispensed from the opening 434. The first slit size 512 may further control the flow rate of the liquid 472.

[0186] like Figure 5B As shown, when in the open configuration, the opening 434 can open outward along the elastic flow control valve axis 510 (toward the direction of the flow of the liquid 472). The liquid flow rate of the elastic portion 504 can be controlled based on the opening area formed by the one or more slits 520. The opening area can be partially defined by the second slit size 508 and the first slit size 512. In at least one embodiment, the second slit size 508 is defined along the elastic flow control valve axis 510, and the second slit size 508 is defined in a plane orthogonal to the elastic flow control valve axis 510.

[0187] Figure 6 A system 600 is illustrated that includes components of a spray gun system 400 and a gas source 602 coupled to the spray gun system 400. The system 600 also includes a user's hand 604. The system 600 illustrates that the actuator 408 is positioned on or near the top surface 464 of the spray gun body 404. The actuator 408 can be configured to be positioned so that the hand 604 can use the thumb to press the actuator 408 while the hand 604 is grasping the grip portion of the spray gun body 404. As shown, the grip axis 450 passes through the actuator 408. The longitudinal axis 448 can pass through the nozzle assembly 412 and the liquid outlet 416.

[0188] Fig. 7A and Figure 7B An integrated lid / nozzle 702 is illustrated, which is constructed in a similar manner to the nozzle assembly 412, except that the integrated lid / nozzle 702 includes an integrally formed lid portion 704, and there is no connection structure between the lid and the nozzle assembly. The lid portion 704 can be releasably mated with a cup 706, such as Figure 4A shown.

[0189] In at least one embodiment, a rim 716 of the cover portion 704 can form a liquid inlet 714 that, together with the liquid outlet 712 , defines a liquid passage 710 .

[0190] In at least one embodiment, the liquid reservoir system 708 can be formed from the combination of the cup 706 and the lid portion 704 .

[0191] Figure 8A nozzle assembly 802 is illustrated that is constructed in a similar manner to the integrated lid / nozzle 702, except that the nozzle assembly 802 is integral with the liquid reservoir system 804, and there is no connection structure between the lid and the cup. The nozzle assembly 802 and the liquid reservoir system 804 can be transported together with the liquid in the liquid reservoir system 804, and can be discarded or stored after a single use. Therefore, the liquid reservoir system 804 can be sealed to the nozzle assembly 802. In this configuration, the liquid can be sealed from the atmosphere in the first state even when the embodiment is disassembled from the spray gun (not shown).

[0192] Fig. 9 A nozzle assembly 902 is illustrated that is constructed in a similar manner to the nozzle assembly 412, except that the nozzle assembly 902 includes a resilient flow control valve 904 having a baffle 906 mounted downstream of the resilient portion 918. In addition, in the nozzle assembly 902, the rest portion 938 may be arranged along the Figure 4A Said longitudinal plane orientation.

[0193] The nozzle assembly 902 may include a tubular wall 910 that forms a liquid passage as described with respect to the nozzle assembly 412. The tubular wall 910 may include a retaining structure 914 and a retaining structure 920. Both the retaining structure 914 and the retaining structure 920 may be annular and may include various protrusions, rests, dimples, or recesses to assist in retaining the flexible flow control valve 904. The retaining structure 920 and the retaining structure 914 may separate the liquid passage and form a downstream liquid chamber 926.

[0194] The elastic flow control valve 904 can be similar to Figure 5A The elastic flow control valve 432 in the embodiment of the present invention. The elastic flow control valve 904 may have an upstream side 930a facing the liquid reservoir system (not shown) and a downstream side 930b oriented toward the injection direction. The elastic flow control valve 904 may be oriented along an elastic flow control valve axis 928.

[0195] The elastic flow control valve 904 may have an elastic portion 918, an attachment structure 912 (similar to Figure 5A Attachment structure 516 in ) and frame structure 908. Frame structure 908 may include barbs 916 that are configured to cooperate with retaining structure 914 and form a snap fit.

[0196] The baffle 906 can help regulate the liquid dispensed by the flexible flow control valve 904. In at least one embodiment, the baffle 906 can be considered a part of the flexible flow control valve 904. The baffle 906 can also be a separate part that can be matched with the nozzle assembly 902. The baffle 906 can include a wall 942 with an opening 924 formed therein. In at least one embodiment, the size of the opening 924 is less than the size established by the edge of the retaining structure 920. For example, the diameter of the opening 924 can be no greater than half the diameter of the retaining structure 920. The baffle 906 can also include a tubular wall 940 attached to or formed with the wall 942.

[0197] In at least one embodiment, the downstream side 930b of the elastomeric flow control valve 904 can mate with the upstream side of the baffle 906. The baffle 906 can include features such as barbs 922 on the tubular wall 940 to mate with the retaining structure 920, and include additional features to allow assembly with the frame structure 908. In at least one embodiment, the baffle 906 can be assembled downstream on the elastomeric flow control valve 904. For example, the inner diameter 934 of the baffle 906 can be larger than the inner diameter 936 of the elastomeric flow control valve 904 (which is adjacent to the elastic portion 918).

[0198] As shown, liquid can pass from the upstream side 930a to the downstream side 930b through the elastic portion 918. The dispensed liquid can pass through the opening 924 and enter the downstream liquid chamber 926. In at least one embodiment, the opening 932 of the elastic portion 918 can be axially aligned or even coaxial with the opening 924 along the elastic flow control valve axis 928.

[0199] Fig.10 A nozzle assembly 1002 is illustrated that is similar to the nozzle assembly 412, except that the elastomeric flow control valve 1004 is modified to include a baffle 1006. For example, the nozzle assembly 1002 may include a wall 1022 having a flange 1020. The downstream side 1016b of the elastomeric flow control valve 1004 may be disposed on the flange 1020 and form a fluid-tight connection within the liquid passageway.

[0200] The elastic flow control valve 1004 can include a frame structure 1008 and an elastic portion 1018 as described herein. The frame structure 1008 can include a retaining structure 1012 disposed on an inner bore of the retaining structure 1012. The retaining structure 1012 can be a rest or protrusion sized to hold the tubular wall 1014 of the baffle 1006 in place. For example, the rest of the frame structure 1008 can have an inner diameter 1024 that is smaller than the diameter 1010 of the baffle 1006. In at least one embodiment, the baffle 1006 is located upstream of the elastic portion 1018 (e.g., toward the upstream side 1016a).

[0201] In a second mode of operation, the openings of the baffle 1006 can meter the flow of liquid into the resilient portion 1018 to control the flow rate of the liquid as it is dispensed into the downstream liquid passageway.

[0202] Fig.11 An example of a system 1100 is illustrated that includes a liquid reservoir system 428 and a nozzle assembly 1110 having a nozzle assembly body 1102. The nozzle assembly body 1102 may be similar to Fig.16A and Fig. 16B The nozzle assembly 1602 in FIG. 1 is different in that the cover ( Fig.11 ) on side 1112.

[0203] Thus, the nozzle assembly body 1102 includes a side mounted liquid passage 1104 arranged orthogonally to the reservoir axis 1122. The nozzle assembly body 1102 can include an integrated liquid passage 1104. An elastomeric flow control valve 1124 can be mounted within the liquid passage 1104. The liquid reservoir system 428 can be releasably connected to the nozzle assembly 1110.

[0204] The nozzle assembly body 1102 includes a removable cover (not shown) attached to the liquid passage 1104. The removable cover includes an opening that allows gas to flow from the second end 1114 to the first end 1116 through the gas passage 1108 formed between the removable cover and the nozzle assembly body 1102. The opening can allow liquid from the liquid passage 1104 to be atomized. The rest 1120 can promote atomization, and the liquid and gas can combine at the mixing zone 1118.

[0205] In at least one embodiment, the liquid passage 1104 can be controlled via a gas passage 1108 (within a removable cover), which can be on a side 1112 of the nozzle assembly body 1102 .

[0206] The nozzle assembly body 1102 can be releasably coupled to a gas source at the second end 1114. For example, the nozzle assembly body 1102 can be releasably coupled to a removable cover that is directly coupled to a gas source (not shown). Gas can flow through the gas passage 1108 and create a pressure differential across the elastomeric flow control valve 1124 sufficient to open the elastomeric flow control valve 1124 and allow liquid to flow through the liquid outlet to interact with the gas at the mixing zone 1118.

[0207] When actuated by the liquid passage 1104, gas can flow through the gas passage 1108 and create a negative pressure sufficient to draw the liquid in. The gas and atomized liquid can flow through the gas outlet 1106 and the mixing zone 1118.

[0208] Fig.12 Illustrated is a system 1200 configured to pressurize a liquid to be sprayed by the system 1200. The system 1200 may include a pressurizable liquid reservoir system 1212, a nozzle assembly 1204, and a spray gun platform 1206. The nozzle assembly 1204 may be similar to the nozzle assembly 304 and the nozzle assembly 412 further described herein.

[0209] The pressurizable liquid reservoir system 1212 may be similar to the pressurized system commercially available from 3M (St. Paul, MN) under the trade designation "PPS", model "Type H / O".

[0210] The spray gun platform 1206 can be similar to the spray gun platform 402, except that the spray gun platform 1206 can include an auxiliary gas outlet 1208 that is fluidly coupled to an auxiliary gas inlet 1214 of a pressurizable liquid reservoir system 1212. In a first mode, the gas source 1210 supplies little or no gas. In a second mode, the user can press the actuator 1202, which triggers a valve and causes gas to flow through the auxiliary gas outlet 1208 and into the auxiliary gas inlet 1214 (thus pressurizing the pressurizable liquid reservoir system 1212). In at least one embodiment, the actuator 1202 can also trigger a valve that causes gas to flow through the nozzle assembly 1204, thereby atomizing the liquid as described herein. In at least one embodiment, the auxiliary gas inlet 1214 can be supplied independently of the spray gun platform 1206.

[0211] Fig.13A , Fig. 13B and Fig. 13C The spray gun components including the nozzle assembly 1302 and the air cap 1304 are illustrated. The nozzle assembly 1302 can be configured to cooperate with a spray gun platform (not shown). The nozzle assembly 1302 can share some components with the "3M Performance Spray Gun" commercially available from 3M (St. Paul, Minnesota). Although the nozzle assembly 1302 can be an example of a nozzle cartridge, the principles can be extended to non-cartridge-based spray systems (e.g., Figure 1 and Figure 2 ).

[0212] The gas cap 1304 is commercially available from 3M (St. Paul, Minnesota) and can be configured to fit with a standard spray gun or spray gun nozzle cartridge. The gas cap 1304 can have a gas cap front wall 1306 with a primary opening 1318 formed therein (thus forming part of the gas outlet). The gas cap 1304 can also have one or more auxiliary gas holes 1316 formed therein adjacent to the primary opening 1318. The auxiliary gas holes 1316 can improve the resulting spray pattern.

[0213] The nozzle assembly 1302 and the air cap 1304, when assembled, may be oriented along the longitudinal axis 1308 such that the longitudinal axis 1308 passes through the main opening 1318. The nozzle assembly 1302 may include a nozzle 1310 having a chamber 1314. The nozzle 1310 may be attached to the nozzle assembly 1302.

[0214] One aspect of this embodiment is that the elastomeric flow control valve 1338 may be positioned adjacent to the liquid outlet 1332 to reduce or minimize the amount of liquid remaining downstream of the elastomeric flow control valve after shutting off the flow of gas by closing the actuator.

[0215] like Fig. 13C As shown, the nozzle 1310 may include a nozzle wall 1324 that tapers toward a nozzle tip distal surface 1326 to form a tapered region 1342. The nozzle wall 1324 may form a chamber 1314 on an interior portion of the nozzle wall 1324. The nozzle 1310 may include an elastic flow control valve 1338 mounted adjacent to the nozzle tip distal surface 1326.

[0216] In at least one embodiment, the retaining structure 1340 can be formed within the nozzle wall 1324. For example, the wall can extend inwardly from the nozzle tip distal surface 1326 of the nozzle 1310 and along the longitudinal axis 1308 to form a flange 1330, wherein the distal-most end of the flange 1330 forms a flange rim 1344.

[0217] The nozzle assembly 1302 may include an elastic flow control valve 1338 similar to the elastic flow control valves described herein. The elastic flow control valve 1338 may include a frame structure 1336 and have an upstream side 1320a and a downstream side 1320b. The frame structure 1336 may include an elastic flow control valve rim 1334 on the upstream side 1320a. In at least one embodiment, the flange rim 1344 may have an outer diameter smaller than the outer diameter of the chamber 1314 (e.g., measured transversely to the longitudinal axis 1308). The downstream side 1320b of the elastic flow control valve 1338 may cooperate with the interior of the flange rim 1344 to form a fluid-tight seal between the chamber 1314 and the liquid outlet 1332. This configuration may be advantageous because the elastic flow control valve 1338 may be pushed outward along the longitudinal axis 1308 toward the liquid outlet 1332. The flange 1330 resists outward opening pressure, thereby allowing the elastic flow control valve 1338 to remain fully seated.

[0218] In at least one embodiment, the nozzle tip distal surface 1326 of the nozzle 1310 can protrude downstream beyond the plane established by the air cap front wall 1306 (which is adjacent to the main opening 1318) (e.g., forming an external mixing spray arrangement). An annular opening 1322 can be formed between the nozzle wall 1324 and the air cap front wall 1306 to allow atomizing gas to flow through from the gas passage 1328. The gas exiting the annular opening 1322 and the liquid exiting the liquid outlet 1332 can interact at the mixing zone 1312.

[0219] Fig.14A A nozzle assembly 1402 is illustrated that is constructed in a similar manner to the nozzle assembly 1302, except that an elastic flow control valve 1408 is mounted on the outside of the nozzle wall 1406, rather than the nozzle wall 1406 having a retaining structure. In at least one embodiment, the nozzle assembly 1402 can include a nozzle 1404, an elastic flow control valve 1408, and an air cap 1304 disposed on the nozzle 1404.

[0220] Fig. 14B The elastomeric flow control valve 1408 is illustrated in more detail. For example, the nozzle tip distal surface 1410 of the nozzle 1404 may form an annular rim 1426 that receives the elastomeric flow control valve 1408 at a downstream side of the rim 1426. The nozzle tip distal surface 1410 may be a portion of the nozzle 1404.

[0221] The elastomeric flow control valve 1408 may include a frame structure 1412 and an elastomeric portion 1414 (as in the elastomeric flow control valve 1338), except that the frame structure 1412 may be configured to include a recessed portion 1418 having a diameter complementary to the nozzle tip distal surface 1410. Alternatively, the elastomeric flow control valve 1408 may be made of a single elastomeric member that may be stretched to fit over the recessed portion 1418. Thus, the downstream side 1416b of the elastomeric flow control valve 1338 may cover the nozzle tip distal surface 1410 (and the rim 1426) of the nozzle 1404. An adhesive or other fastener may be applied to the recessed portion 1418 to further secure the elastomeric flow control valve 1408 to the nozzle 1404. The downstream side 1416b of the elastomeric flow control valve 1408 may be exposed to the atmosphere and may be proximate to the mixing zone 1420. In at least one embodiment, the elastomeric flow control valve 1408 can be located at the liquid outlet 1422 such that the outlet of the elastomeric flow control valve 1408 is directly adjacent to the gas outlet 1424 and combines at the mixing zone 1420. In at least one embodiment, the frame structure 1412 does not substantially contact the upstream side 1416a of the nozzle wall 1406.

[0222] Fig.15A , Fig. 15B and Fig. 15C The nozzle assembly 1502 and the integrated air cap / nozzle 1504 in the spray head assembly 1500 are illustrated. The integrated air cap / nozzle 1504 can be a spray gun component or another spray gun component that can be attached to the nozzle assembly 1502. The spray head assembly 1500 can be constructed in a similar manner to the spray head assembly described by Johnson et al. in U.S. Patent No. 9,358,561. For example, Fig. 15B The nozzle assembly 1502 is constructed in a similar manner to the cartridge described in Johnson et al. The integrated air cap / nozzle 1504 is constructed in a similar manner to the integrated air cap / nozzle described in Johnson et al., except that the integrated air cap / nozzle 1504 includes a retaining structure 1510 for cooperating with the elastic flow control valve 1508.

[0223] For example, the integrated air cap / nozzle 1504 may include a cap body including a nozzle body including a nozzle orifice, a nozzle outlet end 1518 located within the nozzle orifice, and a liquid nozzle opening 1520 located within the nozzle outlet end 1518 through which liquid exits during operation of the liquid spray gun system. The integrated air cap / nozzle 1504 may include a center air outlet 1516 located in a gap defined between the nozzle orifice and the nozzle outlet end 1518 through which center air is discharged when liquid is sprayed through the liquid nozzle opening. The liquid nozzle opening and the center air outlet 1516 are formed in a front wall 1522 of the cap body.

[0224] The nozzle body inlet end 1506 of the integrated air cap / nozzle 1504 may have an inner surface 1512 for mating with the liquid passage of the nozzle assembly 1502. The inner surface 1512 may include a retaining structure 1510 (which is shown as a recessed portion sized to receive the elastic flow control valve 1508). The elastic flow control valve 1508 may be similar to the elastic flow control valve 432 described herein. In addition, the elastic flow control valve 1508 may have an upstream side 1514a and a downstream side 1514b. The upstream side 1514a may face upstream of the liquid flow toward the liquid inlet, and the downstream side 1514b may face downstream of the liquid flow toward the liquid outlet. Similar to the elastic flow control valve 1338, the elastic flow control valve 1508 may be placed in the retaining structure 1510 so that the downstream side 1514b faces the liquid nozzle opening 1520 and is positioned adjacent to the liquid nozzle opening 1520.

[0225] Fig.16A , Fig. 16B and Fig. 16CA nozzle assembly 1602 configured to be attached to a spray gun platform is illustrated. Nozzle assembly 1602 can be similar to nozzle assembly 412, except that nozzle assembly 1602 is assembled using multiple body parts. For example, nozzle assembly 1602 can include nozzle body part 1612 and nozzle body part 1614.

[0226] The nozzle assembly 1602 can be oriented along the longitudinal axis 1624. For example, a portion of the gas passage 1618 (formed between the gas outlet 1628 and the gas inlet 1640) can be aligned along the longitudinal axis 1624, as described in the nozzle assembly 412. In at least one embodiment, the retaining structure 1608 can be proximate to the gas inlet 1606. However, the elastic flow control valve 1622 can be oriented along the elastic flow control valve axis 1620. In at least one embodiment, the elastic flow control valve axis 1620 is perpendicular to the longitudinal axis 1624. In at least one embodiment, the elastic flow control valve axis 1620 and the longitudinal axis 1624 can intersect at a location proximate to the gas outlet 1628. The longitudinal axis 1624 can be defined by the direction of the resulting spray pattern, and the elastic flow control valve axis 1620 can be defined by a majority of the cylindrical portion of the elastic flow control valve 1622.

[0227] The liquid passage 1626 (including the liquid chamber 1616) can be formed by the combination of the nozzle body portion 1612 and the nozzle body portion 1614. In at least one embodiment, the nozzle body portion 1612 can partially form the liquid passage 1626 with the nozzle body portion 1614. The liquid passage 1626 can extend from the liquid inlet 1604 to the liquid outlet 1610. The gas can be configured to atomize the liquid at the mixing zone 1630 in operation. In at least one embodiment, the nozzle body portion 1614 can include a retaining member 1632 therein, which is formed in the liquid passage 1626.

[0228] The retaining member 1632 can be engaged with the elastic flow control valve 1622 (e.g., the frame structure 1638). For example, the elastic flow control valve 1622 can be oriented so that the upstream side 1634a faces upstream of the liquid flow and the downstream side 1634b faces downstream of the liquid flow. The liquid can flow through the liquid inlet 1604, through the liquid passage 1626, through the elastic flow control valve 1622, and through the liquid diverter 1636. In at least one embodiment, the liquid diverter 1636 can be formed in the nozzle body portion 1614 and is configured to direct the liquid from the elastic flow control valve 1622 to the liquid outlet 1610 and into the mixing zone 1630.

[0229] In at least one embodiment, the elastomeric flow control valve 1622 can be contained between two or more components (nozzle body portion 1612 and nozzle body portion 1614) that are permanently joined using any of the means previously described or joined using a mechanical fastening mechanism. When combined, the two or more components can form a complete nozzle assembly 1602. In at least one embodiment, the two components (nozzle body portion 1612 and nozzle body portion 1614) can be formed with complementary sealing features so that the elastomeric flow control valve 1622 does not use a frame structure (not shown) separate from the nozzle body.

[0230] Fig.17A , Fig. 17B and Fig. 17C The liquid reservoir component is illustrated as a cap 1702. The cap 1702 can be constructed in a similar manner to the cap 480 described herein, except that the cap 1702 includes a resilient portion 1714 disposed therein. The cap 1702 can be configured to couple with a spray gun inlet from a nozzle assembly or spray gun component.

[0231] For example, the cap 1702 may have a connection structure 1704 as described in PCT Publication WO2018109594A1 by Hegdahl et al. For example, the cap 1702 may include a cap body, wherein the cap body includes a nozzle 1706, a platform 1724 at least partially surrounding the nozzle 1706. The platform 1724 may define a main plane and a partial spiral shape, which is inclined relative to the main plane and rotates around the central axis of the nozzle 1706. Although in Fig.17A 1724 is obscured in the illustration, but the platform 1724 is shown as a relatively flat surface (aligned along the major plane) that transitions to a slope. The cover 1702 may also include a wall having an outer face 1722 that abuts the platform 1724 and includes a portion that is inclined relative to the major plane of the platform 1724. A partial spiral shape 1726 begins in the major plane and interrupts the inclined portion of the outer face of the wall. The cover 1702 may be configured to be attached directly or indirectly to a nozzle assembly or other spray gun component.

[0232] In at least one embodiment, the nozzle 1706 can include a rim 1720 on a distal surface that defines a liquid outlet 1708. The elastic flow control valve 1710 can be connected to Fig. 13C The mid-elastic flow control valve 1338 is coupled to the nozzle tube 1706 in a manner similar to the manner in which it is coupled to the nozzle tip distal surface 1326 .

[0233] For example, the cover 1702 may include a retaining structure 1718 positioned adjacent to the rim 1720, with an upstream side 1728a facing the liquid in the liquid reservoir system (not shown) and a downstream side 1728b oriented downstream (i.e., toward a liquid inlet of a nozzle assembly or another spray gun component). The retaining structure 1718 may include a flange configured to couple with the frame structure 1716 of the elastomeric flow control valve 1710 to form a fluid-tight fit with the cover 1702. When the one or more slits 1730 of the elastomeric portion 1714 open toward the downstream side 1728b (to form the opening 1712) due to a differential pressure exceeding the opening pressure, liquid (if present) is dispensed from the opening 1712, and when the cover 1702 is attached to the nozzle assembly or another spray gun component, the liquid may enter the liquid inlet of the nozzle assembly or another spray gun component.

[0234] Fig.18A , Fig.18B and Fig.18C An embodiment of a liquid reservoir component is illustrated, which is an adapter 1802 coupled to a lid 1804. In at least one embodiment, the adapter 1802 can include a resilient flow control valve 1812 and can be assembled to the lid 1804.

[0235] The lid 1804 may include a lid spout 1828 and a connection feature 1826 disposed thereon.

[0236] Adapter 1802 may have a connection structure 1806 complementary to connection feature 1826 that can be connected to a spray gun platform or nozzle assembly. Adapter 1802 may be assembled on cover spout 1828 of cover 1804. The connection structure 1806 shown is similar to the connection structure described in FIG. 52 of PCT Publication WO 2004 / 037433 to Joseph et al. For example, adapter 1802 may have an integral outlet for direct connection to a bushing of a spray gun platform or nozzle assembly. Liquid outlet 1810 may have a cylindrical portion (e.g., adapter spout 1808) provided with a helical protrusion (e.g., connection structure 1806) for cooperating with an attachment on a spray gun platform or nozzle assembly body. Connection structure 1806 may also include a bearing / raised feature provided at one end of the helical protrusion to form an end stop and limit the rotation of adapter 1802 and / or cover 1804 relative to connection structure 1806.

[0237] In at least one embodiment, the adapter 1802 may also include an elastic flow control valve 1812 having an upstream side 1816a and a downstream side 1816b. The elastic flow control valve 1812 may be attached to the adapter 1802 in a manner similar to the manner in which the elastic flow control valve 1710 is attached to the nozzle 1706. For example, the adapter nozzle 1808 of the adapter 1802 may include a distal surface 1830 and an inner surface 1814. The distal surface 1830 may form a retaining structure 1822 for engaging with the downstream side 1816b of the elastic flow control valve 1710 described herein. The elastic flow control valve 1710 may include a frame structure 1818 and an elastic portion 1820. In at least one embodiment, the sidewall 1824 of the frame structure 1818 may contact the inner surface 1814 so that no gap is formed between the sidewall 1824 and the inner surface 1814. This configuration may reduce liquid that may accumulate at the distal end of the adapter nozzle 1808.

[0238] Fig.19A , Fig.19B and Fig.19C An integrated cap / nozzle 1900 is illustrated. The integrated cap / nozzle 1900 may include a cap 1902 integrally formed with a nozzle assembly body 1904. Similar to Fig. 7A and Figure 7B Similar to the integrated cap / nozzle 702 in FIG. 1 , the integrated cap / nozzle 1900 may also include a flexible flow control valve 1910 , except that the liquid passage 1924 is positioned adjacent to the liquid outlet 1920 .

[0239] For example, the nozzle assembly body 1904 may include a gas inlet 1918 and a gas outlet 1938 forming a gas passage 1922. The nozzle assembly body 1904 may include a liquid inlet 1934 and a liquid outlet 1920 forming a liquid passage 1924. In at least one embodiment, an inner wall 1926 partially spaced apart from the tubular wall 1906 may form at least a portion of the liquid passage 1924. Liquid may be delivered from the liquid inlet 1934 to the liquid outlet 1920 via the liquid passage 1924.

[0240] The nozzle assembly body 1904 can include a tubular wall 1906 forming a gas inlet 1918 coaxial with the longitudinal axis 1908. In at least one embodiment, the longitudinal axis 1908 can be adjustable from 90 degrees to 180 degrees relative to the liquid flow axis 1916.

[0241] In at least one embodiment, the elastic flow control valve 1910 can be adjacent to the liquid inlet 1934. The elastic flow control valve 1910 can include an attachment structure 1914 and an elastic portion 1912 formed of a single component. Therefore, the elastic flow control valve 1910 can lack a frame structure as described herein. The attachment structure 1914 can include an integral flange that forms a seal relative to the liquid inlet 1934 and seals the opening in the liquid inlet 1934. As shown, the elastic portion 1912 can be a duckbill valve. The elastic flow control valve 1910 can open to the downstream liquid chamber 1930. In the second mode, the elastic portion 1912 can be configured to change to an open configuration in response to gas flowing through the gas outlet 1938 and causing a differential pressure across the elastic portion 1912 to be at least the opening pressure of the elastic portion 1912. Any liquid located in an attached compatible cup (not shown) can be dispensed in response to the open configuration and can be atomized at the mixing zone 1940.

[0242] In at least one embodiment, a plenum passage 1932 can be formed within the nozzle assembly body 1904 such that the chamber 1928 of the gas passage 1922 is fluidly coupled to a cap chamber 1936 separate from the liquid passage 1924. The plenum passage 1932 can be described in U.S. Patent No. 9,802,213 to Joseph et al.

[0243] Fig. 20A and Fig. 20B The liquid hose assembly 2002 is illustrated. The liquid hose assembly 2002 can be a spray gun component that is used to feed a liquid in a pressure-feed configuration (with Figure 1 The liquid hose assembly 2002 may include a supply hose 2004 and an adapter 2024 having a connection structure 2026 that is configured to releasably mate with a complementary connection structure of the spray gun platform or nozzle assembly.

[0244] The connection structure 2026 is commercially available from 3M (St. Paul, Minnesota) under the trade name "Performance Spray Gun Pressure Whip", part number 26833. For example, the connection structure 2026 may include a tracking surface 2010 and a locking structure 2028. The locking structure 2028 is configured to selectively interface with a complementary structure on a spray gun platform or nozzle assembly. The adapter 2024 may also include an arm 2008, which may further retain the adapter 2024 on the spray gun platform or nozzle assembly. The adapter 2024 may also include a gripping section 2006, which may allow a user to easily perform a quick connect operation for attaching the adapter 2024 to the spray gun platform.

[0245] In at least one embodiment, the adapter 2024 can include a tubular member 2020. The tubular member 2020 can form a chamber 2012 for sealing with a nozzle on a spray gun platform. The distal surface of the nozzle can engage the sealing surface 2014 of the chamber 2012 and be held in place by a connecting structure 2026.

[0246] The tubular member 2020 may be Fig. 13C The retaining structure 1340, Fig. 17C The retaining structure 1718 and Fig.18C The retaining structure 2022 is formed upstream of the sealing surface 2014 in a manner similar to the retaining structure 1822 in FIG. For example, the retaining structure 2022 can retain the elastic flow control valve 2016 in the direction of the downstream side 2030b so that the fluid pressure from the upstream side 2030a does not cause the elastic flow control valve 2016 to shift downstream. In at least one embodiment, the tubular member 2020 can be machined from metal, and the frame structure 2032 can be locked into a groove at the retaining structure 2022. In at least one embodiment, the tubular member 2020 can have an external thread 2018 for attachment to the supply hose 2004.

[0247] "Spanning" means between two opposing major surfaces. For example, between the upstream and downstream sides of a flexible flow control valve.

[0248] "Actuator" refers to a device or mechanism configured to manually control a gas valve from outside the gas valve body and / or outside the spray gun body or spray gun component body. The term actuator may also include a button or trigger structure.

[0249] "Atmosphere" refers to the conditions surrounding the spray gun system (barometric pressure, temperature, etc.).

[0250] "Atmospheric pressure" refers to the pressure exerted by the atmosphere on the spray gun system.

[0251] "Subject" refers to the material form of an object.

[0252] "Closed" refers to a state of the elastic flow control valve in which no liquid flows when the liquid is on the upstream side of the elastic flow control valve.

[0253] "Closed configuration" refers to a configuration of the elastomeric flow control valve that does not allow liquid to pass from the upstream side to the downstream side when liquid is present on the upstream side of the elastomeric flow control valve. The closed configuration may include an unopened slit or self-sealing flap in the elastomeric portion.

[0254] "Closing pressure" refers to the pressure at or below which the flexible flow control valve will transition from an open configuration to a closed configuration. The closing pressure and the opening pressure may be different values.

[0255] "Differential pressure" refers to the difference in pressure between an upstream (P1) location and a downstream (P2) location. This can be expressed as ΔP = P1 - P2.

[0256] "Downstream liquid chamber" refers to a chamber downstream of the elastomeric flow control valve. The downstream liquid chamber may be configured to facilitate a negative fluid pressure in response to the presence of fluid flow in the gas passage.

[0257] The "downstream side" refers to the side downstream of the elastic portion.

[0258] "Elastomer" refers to natural or synthetic polymers, such as natural or synthetic rubber, that exhibit viscoelastic behavior under deformation, having a low elastic modulus (eg, no greater than 0.5 GPa) and a high strain to failure.

[0259] "Fluid-tight" means preventing the ingress of fluids such as water at the appropriate operating pressure of the spray gun system. In at least one embodiment, the liquid may be at a pressure of no greater than 50 psi.

[0260] "Gas" refers to a substance or thing that is in the state of expanding freely to fill an entire container, having no fixed shape (unlike a solid) and having no fixed volume (unlike a liquid). Gases can be used in a spray process to atomize bulk liquids and form a spray pattern. Gases can be used as carriers for liquids to aid in the delivery of fluids. Examples of gases include nitrogen, carbon dioxide, gas mixtures such as air, and even gas propellants, which may be in a gaseous state at standard pressure but are liquefied at higher pressures.

[0261] "Gas valve" refers to a device that controls, directs, or regulates the flow of gas (and can indirectly control, direct, or regulate the flow of liquid by changing the differential pressure across the elastomeric flow control valves described herein) in a binary or staged manner. Examples of gas valves may include gate valves, poppet valves, butterfly valves, ball valves, etc.

[0262] "Grip portion" refers to a section configured to be gripped by a user's hand.

[0263] "Liner" means disposed in or extending along a straight or nearly straight pipeline.

[0264] "Liquid" refers to coating materials that can be applied to a surface using a spray gun system, including (but not limited to) paints, primers, base coats, lacquers, varnishes and 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 can be applied in atomized or non-atomized form depending on the properties of the material and / or the intended application. In these applications, the term liquid is used generally because it can include solid particles (pigments, powders, granules, etc.) suspended or dissolved in a carrier liquid.

[0265] "Liquid outlet" refers to the location where liquid leaves the spray gun component or will leave the spray gun component without interference from the elastic flow control valve. For example, the elastic flow control valve can be mounted on the liquid outlet of the spray gun component and form part of the liquid outlet. In at least one embodiment, the liquid outlet can be at least partially formed at the distal end of the spray gun component.

[0266] "Liquid passage" refers to the liquid flow path within the body of the spray gun component.

[0267] "Liquid reservoir component" refers to a component within a liquid reservoir system. Examples of liquid reservoir components include caps, containers, cups, pouches, bags, adapters, and liquid hose assemblies.

[0268] A "liquid reservoir system" refers to a system configured to hold or transport a liquid. A liquid reservoir system may include at least one liquid reservoir component. A liquid reservoir system may include multiple liquid reservoir components, such as a cup and a lid. A liquid reservoir system may also include a component fluidly coupled to a barrel, such as a liquid hose assembly. A liquid reservoir system may be a type of liquid source.

[0269] A "manually operated valve" refers to a valve that can be controlled via a mechanical linkage to an actuator. For example, a manually operated valve may be mechanically coupled to another component, such as a trigger of a spray gun platform. The manually operated valve may be translated along the longitudinal axis of the spray. Examples of manually operated valves include poppet valves, globe valves, gate valves, spherical valves, butterfly valves, plug valves, sliding valves, needle valves, levers, or pinch valves. The term "manually operated valve" does not include an elastic flow control valve. For example, even if a slit in the elastic portion can be pushed with manual pressure, an elastic flow control valve is not a "manually operated valve" because the primary and / or intended mechanism is based on differential pressure rather than manual activity.

[0270] "Mixing zone" refers to where the gas stream exits the gas outlet and combines, interacts, intersects and / or atomizes the liquid stream from the liquid outlet.

[0271] "Nozzle assembly" refers to a fluid nozzle and a device for coupling the fluid nozzle to a spray gun platform. The nozzle assembly is used to deliver gas through a gas passage formed therein and / or deliver liquid through a liquid passage formed therein. The gas passage and / or liquid passage of the nozzle assembly can cooperate with the gas passage and / or liquid passage of the spray gun platform. In at least one embodiment, the nozzle assembly can include a nozzle barrel.

[0272] "Nozzle cartridge" refers to a spray gun component having a liquid passage for direct connection to a liquid source / liquid reservoir system and a liquid outlet. When combined with a spray gun platform, the spray gun platform itself does not include a liquid passage, but the spray gun platform may include a portion of a gas passage for connection to a gas source. A nozzle cartridge may refer to a type of nozzle assembly.

[0273] "Open" refers to any state that allows some liquid to flow across the flexible flow control valve when liquid is present on the upstream side. For example, open may refer to partially open.

[0274] "Open configuration" refers to a configuration that allows liquid to pass from the upstream side to the downstream side when liquid is present on the upstream side.

[0275] "Opening size" refers to the maximum size of the opening of the elastic flow control valve.

[0276] "Opening pressure" refers to the differential pressure that can open the elastic part of the elastic flow control valve. Opening pressure is synonymous with cracking pressure.

[0277] "Elasticity" refers to the ability of a material to absorb energy when elastically deformed and release that energy when unloaded. Upon unloading, the material will return to its original state. Elastomeric materials can be elastic.

[0278] "Resilient flow control valve" refers to a valve operable to control the flow of a fluid, the valve having the ability to adjust its degree of opening based on changes in differential pressure, and the resiliency to remain in a normally closed configuration once a predetermined closing differential pressure is reached. The term "resilient flow control valve" may be used to refer to a resilient portion, or any component of a resilient flow control valve.

[0279] "Elastic portion" refers to the portion of an elastic flow control valve that controls the flow of liquid. The elastic portion is configured to change between an open configuration and a closed configuration based on a differential pressure across the elastic portion relative to an opening pressure of the elastic portion. The elastic portion can be elastomeric, but a rigid or semi-rigid layer can also be utilized.

[0280] "Rigid" is used to refer to materials that do not deform / flex easily. In one example, a rigid material can be described as having a "stiffness" or elastic modulus of at least 0.5 GPa.

[0281] "Spray equipment" refers to any equipment or components used to transport, store, or atomize bulk fluids into a fine spray or mist of droplets. Spray equipment can refer to devices that use air spray, airless, rotary / centrifugal, ultrasonic, or electrostatic methods.

[0282] "Spray gun" refers to a type of spray equipment. A spray gun may refer to an air spray gun, which uses a low-pressure stream of liquid mixed with compressed gas to atomize a liquid in a controlled manner.

[0283] "Spray gun components" refers to components that form part of a spray gun system. Examples of spray gun components include spray gun platforms, valves, nozzle assemblies, nozzle barrels, gas caps, liquid reservoir systems and liquid reservoir components thereof. Spray gun components may also include any device that is physically attached to any of the aforementioned spray gun components.

[0284] "Spray gun platform" refers to the spray gun component having a gripping portion, an actuator, and connections to a gas source and optionally a liquid reservoir system. In at least one embodiment, the spray gun platform can refer to a spray gun body with an integrated liquid inlet. In at least one embodiment, the spray gun platform can be manually coupled to a nozzle barrel or nozzle assembly.

[0285] "Spray gun system" refers to one or more spray gun components that, when assembled together, are configured to atomize and / or shape a liquid into a spray. A spray gun system may use air to atomize a liquid. A spray gun may be a manual spray gun system or may be a robotic spray gun system (meaning attached to a robotic arm).

[0286] "Tapered region" refers to a region that tapers from a first dimension to a second dimension. The second dimension is smaller than the first dimension. A dimension may include a diameter or a circumference, and may generally indicate a hole or opening size.

[0287] "Tubular" refers to a long, round and hollow shape. Tubular can refer to an elliptical or polygonal cross section.

[0288] The "upstream side" refers to the side upstream of the elastic portion.

Claims

1. A spray gun component for use in a spray gun system, the spray gun component comprising: The spray gun component body further comprises: a liquid inlet and a liquid outlet, wherein a liquid passage is formed between the liquid inlet and the liquid outlet; at least a portion of a resilient flow control valve disposed within the liquid passage, the resilient flow control valve having an upstream side and a downstream side, the upstream side being configured to be in fluid communication with the liquid inlet and the downstream side being in fluid communication with the atmosphere; wherein in a first mode, a differential pressure across the elastomeric flow control valve is less than an opening pressure of the elastomeric flow control valve and results in a closed configuration; Wherein in a second mode, gas flow from the spray gun system causes the differential pressure across the elastomeric flow control valve to be at least the opening pressure of the elastomeric flow control valve and thereby causes the elastomeric flow control valve to change to an open configuration.

2. The spray gun assembly of claim 1, wherein the spray gun system does not use a needle valve within the fluid passage to control fluid flow.

3. A spray gun component according to claim 1 or claim 2, wherein the only means for controlling the fluid passage between the liquid inlet and the liquid outlet is one or more resilient flow control valves.

4. A spray gun component according to any one of claims 1 to 3, wherein the spray gun system is configured to operate without a manually operated valve, the manually operated valve sealing the liquid passage to isolate it from the atmosphere in the first mode, or unsealing the liquid passage to connect it to the atmosphere in the second mode.

5. A spray gun component according to any one of claims 1 to 4, wherein the elastic flow control valve is arranged proximate to the liquid outlet.

6. The spray gun component of any one of claims 1 to 5, wherein the elastomeric flow control valve is configured to close when the differential pressure across the elastomeric flow control valve is less than a closing pressure of the elastomeric flow control valve.

7. A spray gun component according to any one of claims 1 to 6, wherein in the second mode the downstream side of the elastic flow control valve is below atmospheric pressure.

8. A spray gun component according to any one of claims 1 to 7, wherein the pressure on the upstream side of the resilient flow control valve is increased by gas pressure from a compatible spray gun body or gas source.

9. The spray gun component according to any one of claims 1 to 8, further comprising a gas inlet and a gas outlet, wherein a gas passage is formed between the gas inlet and the gas outlet.

10. A spray gun component according to any one of claims 1 to 9, wherein the liquid passage further comprises a retaining structure configured to engage the resilient flow control valve.

11. A spray gun component according to any one of claims 1 to 10, wherein the elastic flow control valve comprises a frame structure and an elastic portion attached to the frame structure, wherein the frame structure is configured to cooperate with the retaining structure.

12. The spray gun component of claim 11, wherein the resilient portion includes at least one self-sealing opening formed therein.

13. The spray gun component of claim 12, wherein the self-sealing opening is formed by slits, cross-shaped slits, or star-shaped pattern slits formed in the resilient portion.

14. A kit comprising at least the spray gun components according to any one of claims 1 to 13.

15. A method of using a spray gun component according to any one of claims 1 to 13, wherein the spray gun component is a nozzle assembly body, the method comprising: obtaining a spray gun system, the spray gun system comprising the nozzle assembly body, the nozzle assembly body having a liquid inlet and a liquid outlet forming a liquid passage and a gas inlet and a gas outlet forming a gas passage, wherein the liquid outlet and the gas outlet are configured to intersect at a mixing zone adjacent to the liquid outlet and the gas outlet, wherein a resilient flow control valve is disposed in a fluid-tight manner within the liquid passage, wherein the spray gun system is coupled to a gas source controlled by an actuator; activating the actuator to allow gas to flow through the gas passage and the gas outlet; In response to activating the actuator, the gas flow causes a change in a differential pressure across the elastomeric flow control valve, the differential pressure exceeding an opening pressure of the elastomeric flow control valve and thereby causing the elastomeric flow control valve to change to an open configuration; The actuator is deactivated, thereby reducing gas flow through the gas passage and reducing the differential pressure across the elastomeric flow control valve to no greater than a closing pressure of the elastomeric flow control valve, thereby causing the elastomeric flow control valve to change to a closed configuration.

16. The method according to claim 15, further comprising: The spray gun system is assembled by attaching the nozzle assembly body to a spray gun platform, the spray gun platform including a second gas passage coupled to the gas passage in the nozzle assembly body, the liquid passage in the nozzle assembly body being separate from the gas passage and the second gas passage.

17. A nozzle assembly, comprising: The nozzle assembly body further comprises: a gas passage and a liquid passage formed in the nozzle assembly body, the liquid passage formed between a liquid inlet and a liquid outlet, wherein the liquid passage is configured to be fluidly coupled to a liquid reservoir system configured to contain a liquid, and the gas passage is configured to be fluidly coupled to a gas source; wherein a resilient flow control valve is disposed within the liquid passage, the resilient flow control valve having an upstream side and a downstream side, the upstream side being in fluid communication with the liquid reservoir system, and the downstream side being in fluid communication with the liquid outlet; Wherein in response to a pressure differential across the first side and the second side being at least an opening pressure of the elastomeric flow control valve, thereby allowing the elastomeric flow control valve to open, gas flow through the gas passage causes the elastomeric flow control valve to open.

18. The nozzle assembly of claim 17, wherein the nozzle assembly is removable from the spray gun platform and maintains a fluid-tight seal between the atmosphere and the contents of the liquid reservoir system.

19. A cover for a liquid reservoir system, the cover comprising: a lid body having a liquid inlet and a liquid outlet, the liquid inlet being configured to connect to a compatible cup and the liquid outlet being configured to connect to a compatible spray gun system, a liquid passage formed in the lid body and fluidly connecting the liquid inlet and the liquid outlet; wherein an elastic flow control valve is disposed in the liquid passage, the elastic flow control valve having a first side and a second side, the first side being in fluid communication with the liquid inlet, and the second side being in fluid communication with the liquid outlet; Wherein when a pressure differential across the first side and the second side equals or exceeds an opening pressure of the elastomeric flow control valve, gas flow through the compatible liquid spray gun system causes the elastomeric flow control valve to open.

20. The cover of claim 19, further comprising a spout forming a portion of the liquid passage, the spout having an inner surface having a retaining structure disposed thereon, the retaining structure being configured to engage with the elastic flow control valve.

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