Multi-component injector and cartridge for multi-component injector

Abstract

A multi-component injector receives a flow of component materials and combines the component materials together to form a multi-component material for injection of a surface. The cartridge contains a valve for controlling the flow of component materials to the mixing chamber within which the component materials combine to form a multi-component material. The cartridge may be mounted to and removable from a lance body of a multi-component injector as a single unit.

Description

[0001] Cross - reference to related applications

[0002] This application claims priority to U.S. Provisional Application No. 63 / 422,505, filed on November 4, 2022, titled "Solvent Metering Feed and Metering Piston for Sprayers", and claims priority to U.S. Provisional Application No. 63 / 444,502, filed on February 9, 2023, titled "Multi - component Spray Gun Cartridge", and claims priority to U.S. Provisional Application No. 63 / 459,484, filed on April 14, 2023, titled "Multi - component Spray Gun Cartridge". The disclosures of these provisional applications are hereby incorporated by reference in their entirety. Technical field

[0003] The present invention relates to the spraying of multi - component mixtures. More specifically, the present invention relates to sprayers for spraying multi - component mixtures and their components. Background art

[0004] Spray foam is typically formed by mixing isocyanate and polyol resin components and is a widely used sprayable multi - component fluid. Multi - component fluids can also be glues, adhesives, paints, and other materials. For example, epoxy resin can be sprayed. Each component material flows into a spray gun, where they are mixed to form a multi - component material and then sprayed as a single solution. Since this single solution is formed from multiple constituent components, it can also be referred to as a multi - component material.

[0005] Due to the fast - reacting and solidifying characteristics of the fluid, each constituent component is typically mixed in the spray gun and then sprayed within a few milliseconds. The mixing can be carried out in a mixing chamber within the spray gun. In various embodiments, the mixing chamber can form part of the spray gun nozzle. Due to the fast - solidifying characteristics of the mixed fluid, special attention must be paid to the maintenance of the spray gun. For example, any residue of a component in the spray gun (e.g., in or around the mixing chamber) can react when it comes into contact with its complementary component or otherwise dry out. Blockages and other obstructions can interfere with the mechanical operation of the spray gun and affect normal mixing and spraying. Various aspects of the present disclosure relate to improving maintenance to extend the service life and / or improve spraying performance, etc. Summary of the invention

[0006] According to one aspect of the present disclosure, a cartridge is configured to be used with a multi-component spray gun that has a spray gun body and is configured to receive a first component material and a second component material that are mixed to form a multi-component material. The cartridge includes: a valve body extending between a first body end and a second body end; a first flow valve located within the valve body; a second flow valve located within the valve body; and a mixing chamber cavity that extends along an ejection axis into the first body end of the valve body, the mixing chamber cavity being configured to receive at least a portion of the mixing chamber of the multi-component spray gun. The cartridge is removable from the spray gun body as a single module. If the mixing chamber has not been removed from the cartridge, removing the cartridge from the spray gun body necessarily disconnects any connection of the mixing chamber to the spray gun body.

[0007] According to an additional or alternative aspect of the present disclosure, a multi-component spray gun is configured to receive a first component material and a second component material and output a spray of a multi-component material. The multi-component spray gun includes: a spray gun body; a handle extending from the spray gun body; a trigger supported by the spray gun body; a cartridge removably mounted to the spray gun body; and a mixing chamber. The cartridge includes: a valve body extending between a first body end and a second body end, the second body end being configured to engage with the spray gun body to connect the cartridge to the spray gun body; a first flow valve located within the valve body; a second flow valve located within the valve body; and a mixing chamber cavity that extends along an ejection axis into the first body end of the valve body. The cartridge is detachable from the spray gun body as a single module. The mixing chamber is mountable within the mixing chamber cavity. If the mixing chamber has not been removed from the cartridge, removing the cartridge from the spray gun body necessarily disconnects any connection of the mixing chamber to the spray gun body.

[0008] According to another additional or alternative aspect of the present disclosure, a cartridge for use with a multi-component spray gun having an actuator assembly including a spray gun body and a displacer, the cartridge configured to receive a first component material and a second component material that are mixed to form a multi-component material. The cartridge includes: a valve body extending along an axis between a first body end and a second body end; a mixing chamber cavity formed in the valve body; a first flow valve located within the valve body; a second flow valve located within the valve body; a valve mount configured to engage the actuator assembly at a dynamic interface to receive a mechanical input to actuate the first flow valve and the second flow valve between a corresponding first state and a corresponding second state, in the first state, the flow of the first component material and the second component material to the mixing chamber cavity is closed, and in the second state, the flow of the first component material and the second component material to the mixing chamber cavity is opened; and a body mount formed on the valve body and configured to engage the actuator assembly at a static interface to mount the cartridge to the spray gun body. The cartridge can be mounted to and removed from the actuator assembly as a single unit.

[0009] According to yet another additional or alternative aspect of the present disclosure, a cartridge for use with a multi-component injector having an actuator assembly including a spray gun body and a displacer, the cartridge configured to receive a first component material and a second component material that are mixed to form a multi-component material. The cartridge includes: a valve body extending along an axis between a first body end and a second body end, the valve body including the body mount configured to engage the spray gun body to secure the valve body to the spray gun body; a mixing chamber cavity formed in the valve body and opening through the first body end; and a valve assembly supported by the valve body, the valve assembly movable along the axis and relative to the valve body to open and close a flow path for the first component material and the second component material to the mixing chamber cavity, the valve assembly including a valve mount configured to engage the displacer to secure the valve assembly to the displacer. The cartridge can be mounted to and removed from the actuator assembly as a single unit.

[0010] According to a further additional or alternative aspect of the present disclosure, a cartridge for a multi-component injector, the multi-component injector having an actuator assembly including a spray gun body and a displacer, the cartridge configured to receive a first component material and a second component material that are mixed to form a multi-component material. The cartridge includes a valve body and a valve assembly, the valve body extending along an axis between a first body end and a second body end. The valve body includes: a block; a mixing chamber cavity extending into the block along the axis in a first axial direction; a first valve bore extending into the block along the axis in a second axial direction, wherein a first gas chamber and a first flow chamber configured to receive the first component material are disposed within the first valve bore, and wherein the second axial direction is opposite to the first axial direction; a second valve bore extending into the block in the second axial direction, wherein a second gas chamber and a second flow chamber for receiving a second component material are disposed within the second valve bore; a gas passage extending into the block in the second axial direction; and a body mount configured to engage with the spray gun body to secure the valve body to the spray gun body. The valve assembly is supported by the valve body and includes: a first valve member at least partially disposed within the first valve bore, the first valve member being movable relative to the block between a first member first state and a first member second state, in the first member first state, the first gas chamber is in fluid communication with the mixing chamber cavity and the first flow chamber is in fluid disconnection from the mixing chamber cavity, in the first member second state, the first flow chamber is in fluid communication with the mixing chamber cavity and the first gas chamber is in fluid disconnection from the mixing chamber cavity; a second valve member at least partially disposed within the second valve bore, the second valve member being movable relative to the block between a second member first state and a second member second state, in the second member first state, the second gas chamber is in fluid communication with the mixing chamber cavity and the second flow chamber is in fluid disconnection from the mixing chamber cavity, in the second member second state, the second flow chamber is in fluid communication with the mixing chamber cavity and the second gas chamber is in fluid disconnection from the mixing chamber cavity; and a valve mount configured to engage with the displacer to secure the valve assembly to the displacer. The cartridge is mountable to and removable from the actuator assembly as a single unit.

[0011] In accordance with yet another additional or alternative aspect of the present disclosure, a multi-component spray gun configured to receive a first component material and a second component material and output a spray of the multi-component material, the multi-component spray gun comprising: an actuator assembly including a spray gun body and a displacer movable relative to the spray gun body along an axis; and a cartridge removably mounted to the actuator assembly by a static interface formed between the cartridge and the spray gun body and a dynamic interface formed between the cartridge and the displacer, the dynamic interface configured to actuate a first flow valve of the cartridge to control the flow of the first component material to a mixing chamber cavity formed in the cartridge, and the dynamic interface configured to actuate a second flow valve of the cartridge to control the flow of the second component material to the mixing chamber cavity. The cartridge is mountable to and removable from the actuator assembly as a single unit.

[0012] In accordance with yet another additional or alternative aspect of the present disclosure, a cartridge for use with a multi-component spray gun having an actuator assembly including a spray gun body and a displacer, the cartridge configured to receive a first component material and a second component material that are mixed to form a multi-component material. The cartridge includes: a valve body extending along an axis between a first body end and a second body end; a mixing chamber cavity formed in the valve body and opening through the first body end; a first valve bore formed in the valve body and opening through the second body end; a second valve bore formed in the valve body and opening through the second body end; a valve assembly supported by the valve body, the valve assembly including: a first valve member at least partially disposed within the first valve bore and a second valve member at least partially disposed within the second valve bore; a first flow valve formed within the first valve bore, the first valve member forming a movable valve member of the first flow valve; and a second flow valve formed within the second valve bore, the second valve member forming a movable valve member of the second flow valve. The valve assembly is movable relative to the valve body to actuate the first flow valve and the second flow valve to move between a respective first state and a respective second state, in the first state, the flow of the first component material to the mixing chamber cavity and the flow of the second component material to the mixing chamber cavity are blocked, and in the second state, the flow of the first component material to the mixing chamber cavity and the flow of the second component material to the mixing chamber cavity are not blocked. The cartridge is mountable to and removable from the actuator assembly as a single unit.

[0013] According to a further additional or alternative aspect of the present disclosure, a cartridge is for use with a multi-component spray gun having an actuator assembly including a spray gun body and a displacer. The cartridge is configured to receive a first component material and a second component material that are mixed to form a multi-component material. The cartridge includes: a valve body extending along an axis between a first body end and a second body end; a mixing chamber cavity formed in the valve body and opening through the first body end; a first valve hole formed in the valve body and opening through the second body end; a second valve hole formed in the valve body and opening through the second body end; and a valve assembly supported by the valve body. The valve assembly includes: a coupler at least partially disposed within the valve body; a first valve member connected to the coupler and at least partially disposed within the first valve hole; and a second valve member connected to the coupler and at least partially disposed within the second valve hole. The coupler is configured to transmit a force to the first valve member to displace the first valve member along the first valve hole between a first state of the first member and a second state of the first member. In the first state of the first member, the flow of the first component material to the mixing chamber cavity is blocked, such that the first component material is blocked from flowing into the mixing chamber cavity. In the second state of the first member, the flow of the first component material to the mixing chamber cavity is not blocked, such that the first component material can flow into the mixing chamber cavity. The coupler is configured to transmit a force to the second valve member to displace the second valve member along the second valve hole between a first state of the second member and a second state of the second member. In the first state, the flow of the second component material to the mixing chamber cavity is blocked, such that the second component material cannot flow to the mixing chamber cavity. In the second state of the second member, the flow of the second component material to the mixing chamber cavity is not blocked, such that the second component material can flow to the mixing chamber cavity. The cartridge is mountable to and removable from the actuator assembly as a single unit, such that the valve body and the valve assembly can be mounted together and removed together.

[0014] According to a further additional or alternative aspect of the present disclosure, a multi-component injector is configured to receive a first component material and a second component material and eject a spray of a multi-component material formed by the combination of the first component material and the second component material. The multi-component spray gun includes: a gun body; a displacer at least partially disposed within the gun body; a mixing chamber configured to receive the first component material and the second component material and eject the multi-component material; a cartridge that can be mounted as a single unit to the gun body and the displacer and detached from the gun body and the displacer. The cartridge includes: a valve body extending along an axis between a first body end and a second body end; a mixing chamber cavity formed in the valve body and opening through the first body end, the mixing chamber being at least partially disposed within the mixing chamber cavity; a first valve hole formed in the valve body and opening through the second body end; a second valve hole formed in the valve body and opening through the second body end; and a valve assembly supported by the valve body. The valve assembly includes: a first valve member at least partially disposed within the first valve hole; and a second valve member at least partially disposed within the second valve hole. The first valve member is movable relative to the first valve hole between a first member first state and a first member second state. In the first member first state, the flow of the first component material toward the mixing chamber cavity is blocked, such that the first component material is blocked from flowing toward the mixing chamber cavity. In the first member second state, the flow of the first component material toward the mixing chamber cavity is not blocked, such that the first component material can flow toward the mixing chamber cavity. The second valve member is movable relative to the second valve hole between a second member first state and a second member second state. In the second member first state, the flow of the second component material toward the mixing chamber cavity is blocked, such that the second component material cannot flow toward the mixing chamber cavity. In the second member second state, the flow of the second component material toward the mixing chamber cavity is not blocked, such that the second component material can flow toward the mixing chamber cavity.

[0015] According to a further additional or alternative aspect of the present disclosure, a multi-component injector is configured to receive a first component material and a second component material and eject a spray of a multi-component material formed by combining the first component material and the second component material. The multi-component spray gun includes: a gun body; a displacer at least partially disposed within the gun body; a mixing chamber configured to receive the first component material and the second component material and eject the multi-component material; a first flow valve configured to control the flow of the first component material to the mixing chamber; a second flow valve configured to control the flow of the second component material to the mixing chamber; and a shut-off member supported by the gun body and connected to the first flow valve and the second flow valve, the shut-off member being configured to actuate the first flow valve to cut off the flow of the first component material to the mixing chamber and configured to actuate the second flow valve to cut off the flow of the second component material to the mixing chamber.

[0016] According to a further additional or alternative aspect of the present disclosure, a multi-component injector is configured to receive a first component material and a second component material and eject a spray of a multi-component material formed by combining the first component material and the second component material. The multi-component spray gun includes: a gun body; a displacer at least partially disposed within the gun body; a mixing chamber configured to receive the first component material and the second component material and eject the multi-component material, the mixing chamber being configured to eject the multi-component material in a first axial direction along an ejection axis from an ejection port; a valve assembly configured to control the flow of the first component material to the mixing chamber and control the flow of the second component material to the mixing chamber, the valve assembly being connected to the displacer to be actuated along the ejection axis; and a shut-off member connected to the valve assembly and configured to actuate the valve assembly in a second axial direction opposite to the first axial direction along the ejection axis to cut off the flow of the first component material and the flow of the second component material to the mixing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1A is a first isometric view of the spray gun.

[0018] Figure 1B is a second isometric view of the spray gun.

[0019] Figure 1C is an exploded view of the spray gun.

[0020] Figure 2A is along Figure 1A in the line 2-2 sectional view, showing the spray gun in a non-spraying state.

[0021] Figure 2B is along Figure 1ACross-sectional view of line 2-2 in [description], showing the spray gun in the spraying state.

[0022] Figure 3 is taken along Figure 1A in [description] and is a cross-sectional view taken along line 3-3.

[0023] Figure 4A is Figure 3 an enlarged view of detail 4A in [description].

[0024] Figure 4B is taken along Figure 3 in [description] and is a cross-sectional view taken along line 4B-4B, showing the interface between the barrel and the manifold.

[0025] Figure 5A is an isometric view of the barrel and the mixing assembly.

[0026] Figure 5B is an exploded view of the barrel and the mixing assembly.

[0027] Figure 5C is an isometric view of the barrel.

[0028] Figure 6A is taken along Figure 5A in [description] and is a cross-sectional view taken along line A-A.

[0029] Figure 6B is taken along Figure 5A in [description] and is a cross-sectional view taken along line B-B.

[0030] Figure 6C is taken along Figure 5A in [description] and is a cross-sectional view taken along line C-C.

[0031] Figure 7A is taken along Figure 5A in [description] and is a cross-sectional view taken along line 7-7, showing the valve assembly located at a position associated with the flow valve in a corresponding first open state.

[0032] Figure 7B is taken along Figure 5A in [description] and is a cross-sectional view taken along line 7-7, showing the valve assembly located at a position associated with the flow valve in a corresponding closed state.

[0033] Figure 7C is taken along Figure 5A in [description] and is a cross-sectional view taken along line 7-7, showing the valve assembly located at a position associated with the flow valve in a corresponding second open state.

[0034] Figure 8A is an isometric view of the barrel as seen from the rear side of the barrel.

[0035] Figure 8BAn enlarged isometric view of the cartridge as seen from the rear of the cartridge, with the air rod removed for clarity.

[0036] Figure 8C An enlarged isometric view of a part of the actuator assembly.

[0037] Figure 9 An exploded view of the valve assembly showing the interface between the valve member and the coupler.

[0038] Figure 10A An isometric view of the coupler.

[0039] Figure 10B A front view of the rear side of the coupler.

[0040] Figure 11A Is along Figure 1A A partial cross-sectional view taken along line 11-11 in showing the shutoff member in the unlocked state.

[0041] Figure 11B Is similar to Figure 11A A partial cross-sectional view, but shows the shutoff member in the locked state.

[0042] Figure 12A A first exploded view of the closing and driving piston.

[0043] Figure 12B A second exploded view of the closing and driving piston.

[0044] Figure 13A An isometric view of the shutoff member and the driving piston showing the shutoff member in the unlocked state.

[0045] Figure 13B An isometric view of the shutoff member and the driving piston showing the shutoff member in the locked state. Detailed Description

[0046] The present disclosure generally relates to multi-component spray guns. The cartridge of the present disclosure can quickly and efficiently assemble a spray gun for spraying and can be disassembled for maintenance. The cartridge can be installed as a single unit onto the actuator assembly of the spray gun and can also be removed from the actuator assembly. The cartridge includes a valve assembly for controlling the flow of the component materials to the mixing chamber for mixing the multi-component materials and spraying. The valve assembly can control the flow rate of the component materials and the flow rate of the compressed air to the mixing chamber.

[0047] The cartridge according to the present invention can include a mixing chamber that is at least partially disposed within and supported by the cartridge body of the cartridge. The mixing chamber can be mounted to the cartridge body such that when the cartridge is installed onto or removed from the spray gun, the mixing chamber can remain mounted to the cartridge body. Removing the cartridge from the actuator assembly of the spray gun necessarily disassembles the mixing chamber from the other components of the spray gun.

[0048] The cartridge of the present disclosure can be installed on the spray gun through a dynamic connection interface. This dynamic interface transfers mechanical force to the valve of the cartridge to actuate the valve to switch between various flow states. The cartridge includes a valve coupler configured to receive mechanical force from the actuator assembly of the spray gun and transfer the mechanical force to the valve member to actuate the valve member.

[0049] The cartridge of the present disclosure can be installed on the spray gun through a static connection interface. The static interface fixes the cartridge to the spray gun body of the spray gun. The static interface prevents relative movement of the cartridge along the injection axis, thereby keeping the cartridge installed on the spray gun body. The body coupler of the cartridge engages with the spray gun body to install the cartridge on the spray gun body. The body coupler of the static interface and the valve coupler of the dynamic interface can be configured to be installed on the spray gun such that the dynamic connection interface and the static connection interface are formed simultaneously during installation and disconnected simultaneously during disassembly.

[0050] The spray gun according to the present invention includes a manual cut-off member that allows the user to manually actuate the valve assembly of the cartridge to cut off the flow of the component material. This cut-off member actuates the valve assembly of the cartridge to block the flow of the component material to the mixing chamber, thereby stopping the spraying of the multi-component material. The cut-off member can be configured to lock the spray gun in a non-spraying state, and even if the trigger is pressed, the spray gun cannot be actuated to the spraying state.

[0051] When components are arranged along an axis in a common axial position, these components can be considered to radially overlap. A radial line extending from the axis will pass through each radially overlapping component. When components are arranged relative to the axis in a common radial and circumferential position such that an axis parallel to the axis passes through the axially overlapping components, these components can be considered to axially overlap. When components are aligned about the axis such that a circle centered on the axis passes through the circumferentially overlapping components, these components can be considered to circumferentially overlap.

[0052] Figure 1A is a first isometric view of the injector 10. Figure 1B is a second isometric view of the injector 10. Figure 1C is an exploded view of the injector 10. Figures 1A to 1C are discussed together. The injector 10 includes an actuator assembly 12, a spray gun body 30, a cartridge 14, a mixing assembly 16, a manifold 18, fasteners 20, a cut-off member 22, a trigger 24, a gas connector 26, and a spray port 28. The spray gun body 30 of the actuator assembly 12 is shown in the figure. The spray gun body 30 includes a housing 32 and a handle 34. The gas cap 36 of the mixing assembly 16 is also shown in the figure.

[0053] The injector 10 is configured as a multi-component spray gun. The injector 10 is configured to receive individual component material streams and combine these component materials into a multi-component material that is output from the injector 10 in the form of a spray. The injector 10 is configured to receive individual component material streams (e.g., two or more component materials), combine these component materials to form a multi-component material, and eject a spray of the resulting multi-component material. The injector 10 may also be referred to as a spray gun.

[0054] In some examples, the injector 10 may be configured as a foam spray gun for spraying various foams, e.g., polyureas and other curable or otherwise fixable multi-component foam fluids. A typical foam spraying system includes a first pump and a second pump (not shown in the figures). The first pump supplies a first component material and the second pump supplies a second component material. Two-component spray foam is typically made by mixing a first component material (e.g., isocyanate) and a second component material (e.g., polyol resin) to form the final foam. Although the injector 10 is described as a foam spray gun, it is understood that foam is a broad type of multi-component material that can be sprayed. The multi-component material can also be glue, adhesive, paint, epoxy resin, and other materials. Although the example of spraying foam is used herein, the component materials can be any type of mixable and sprayable component liquids. These mixtures are mixed in the injector 10 and sprayed as a single solution.

[0055] The terms "component A" and "component B" will be used herein to refer to liquids that can be mixed and sprayed as a single fluid stream. Although the example of spraying foam is used herein, component A and component B can be any type of mixable and sprayable liquid components. The mixtures are mixed in the injector 10 and sprayed as a single solution. This single solution may be referred to as a multi-component material since it is formed from multiple constituent components (e.g., component A and component B). Although component A and component B are used as examples herein, it should be understood that some multi-component materials can be composed of more than two component materials and the disclosure herein is not limited to multi-component materials formed from two constituent components.

[0056] Due to the properties of the fluids to react and solidify quickly, the constituent components are typically mixed in the injector 10 and then ejected within a few milliseconds. The mixing can occur in a mixing chamber within the injector 10. In various embodiments, the mixing chamber can form part of the nozzle of the injector 10. The ejection orifice 28 can be formed by the mixing chamber. The mixing chamber can be connected to the air cap 36 and form part of the mixing assembly 16, as discussed in more detail below.

[0057] The actuator assembly 12 is for supporting the cartridge 14 and is configured to actuate a valve within the cartridge 14 between various flow states. The actuator assembly 12 can actuate the valve of the cartridge 14 to initiate and stop the ejection of the multi-component material by the ejector 10. The actuator assembly 12 can include an outer housing (e.g., formed by the spray gun body 30) and various internal components. The actuator assembly 12 includes a displacer that provides a force to the valve of the cartridge 14 to actuate the valve of the cartridge 14 and control the flow of the component materials to the mixing chamber.

[0058] The spray gun body 30 (also referred to as the air body) supports other components of the ejector 10. The handle 34 extends from the housing 32. The spray gun body 30 is configured to receive a stream of compressed gas (e.g., compressed atmospheric air) and route the compressed gas to other components of the ejector 10. The gas connector 26 extends from the spray gun body 30 and is configured to connect to a hose extending from a compressed gas source (e.g., a pressurized tank, a compressor, etc.). The hose routes the compressed gas to the ejector 10 through the gas connector 26. The gas connector 26 can be configured to connect to the hose in any desired manner. For example, the gas connector 26 can be configured as a quick-connect fitting and can include external threads, etc.

[0059] The housing 32 contains an actuator, e.g., a piston, which is configured to actuate the valve assembly of the cartridge 14 to control the flow of the component materials to the ejection orifice 28. The spray gun body 30 is configured to route compressed gas to a chamber within the housing 32 to displace the actuator and is configured to route compressed gas to the cartridge 14. The cartridge 14 routes the compressed gas to the mixing assembly 16 for output from the air cap 36 and the ejection orifice 28.

[0060] The handle 34 can be used for single-handed gripping of the ejector 10 so that a user can pick up, support, and operate the ejector 10 with one hand. The ejector 10 includes a trigger 24 supported by the spray gun body 30. Actuating the trigger 24 by a user with one or more fingers can cause the ejector 10 to eject, and releasing the trigger 24 can cause the ejector 10 to stop ejecting.

[0061] The cartridge 14 is configured to be mounted to the spray gun body 30. The cartridge 14 can be mounted to and removed from the spray gun body 30. The cartridge 14 can be mounted and removed as a single module. When the cartridge is removed, the flow paths of the first and second component materials are not retained on or within the actuator assembly. The cartridge 14 includes an internal valve assembly that is configured to control the flow of the component materials to the mixing assembly 16. The internal valve assembly can be configured to control at least a portion of the flow of compressed gas to the mixing assembly 16. In the illustrated example, the cartridge 14 is configured to directly engage with the housing 32 to be mounted to the spray gun body 30. The cartridge 14 contains a fluid handling assembly. The cartridge 14 is configured to route the component materials and compressed gas to the mixing assembly 16.

[0062] The manifold 18 is supported by the spray gun body 30. In the illustrated example, the manifold 18 is mounted on the cartridge 14 and is supported by the spray gun body 30 via the cartridge 14. The component materials are supplied to the cartridge 14 through the manifold 18. In various other embodiments, the component materials may be introduced through a passage that passes through the spray gun body 30. However, in the illustrated embodiment as well as in various embodiments, the component materials do not flow through the spray gun body 30 but instead flow directly through the manifold 18 to the cartridge 14. In the illustrated example, the spray gun body 30 does not route the flow of the component materials and the component materials do not flow within the spray gun body 30.

[0063] The manifold 18 is directly attached to the cartridge 14. The manifold 18 is not attached to the spray gun body 30. As shown, the manifold 18 is mounted to the cartridge 14 by fasteners 20. In the illustrated example, the fasteners 20 are bolts, but different types of connections may be employed. In the illustrated example, the fasteners 20 extend through a portion of the manifold 18 and into the cartridge 14.

[0064] The manifold 18 is configured to connect to a component pipeline that supplies a separate flow of component materials to the manifold 18. The manifold 18 includes a material inlet 38 for receiving the component materials into the manifold 18. The material inlet 38 may be formed as a fitting configured to connect to a component pipeline (e.g., a hose) that supplies the component materials to the manifold 18. The material inlet 38 may be formed in any desired configuration for connection to the supply pipeline, such as a quick connection, threading, etc. The manifold 18 directs the component materials to the cartridge 14. The component materials are maintained in fluid-separated, distinct paths within the manifold 18. The component materials do not mix within the manifold 18. The component materials are provided to the cartridge 14 in different, separate flows.

[0065] The manifold 18 includes a material valve 40 that can be actuated between an open and a closed state. The user can actuate the material valve 40 by operating a handle of the material valve 40 from outside the manifold 18. When the material valve 40 is in the closed state, the flow path through the manifold 18 is closed and the component materials associated with that material valve 40 are prevented from flowing downstream to the cartridge 14. When the material valve 40 is in the open state, the flow path through the manifold 18 is opened and the component materials associated with that material valve 40 can flow to the cartridge 14.

[0066] The mixing assembly 16 can be installed onto the cartridge 14 and can also be removed from the cartridge 14. The air cap 36 is configured to output compressed gas near the ejection orifice 28. The ejection orifice 28 is oriented through a central opening of the air cap 36. The ejection orifice 28 is oriented along an ejection axis SA, and the ejector 10 is configured to output a multi-component material along this axis. The ejection orifice 28 is configured to eject a spray of the multi-component material from the ejector 10. During ejection, a fluid mixture is ejected from the ejection orifice 28. In various examples, the ejection orifice 28 is at least partially supported by the air cap 36. The air cap 36 can be a retainer for the mixing chamber, as discussed in more detail below. The ejection orifice 28 can be formed by the mixing chamber.

[0067] The shut-off member 22 is supported by the spray gun body 30. The knob 42 of the shut-off member 22 can be operated outside the ejector 10. The shut-off member 22 can be actuated between a locked state and an unlocked state. When the shut-off member 22 is in the locked state, the ejector 10 is locked in a non-ejection state such that the valve assembly within the cartridge 14 cannot be actuated to open the flow path for the component materials to the mixing assembly 16. When the shut-off member is in the unlocked state, the ejector 10 can be placed in an ejection state, for example, by actuating the trigger 24, such that the valve assembly within the cartridge 14 can be actuated to open the flow path for the component materials to the mixing assembly 16. In the illustrated example, the knob 42 provides a user interface for the shut-off member 22. The user can actuate the knob 42 to transfer the shut-off member 22 between the locked state and the unlocked state. For example, the user can rotate the knob 42 to transfer the shut-off member 22 between the locked state and the unlocked state.

[0068] The shut-off member 22 can be configured to actuate the ejector 10 from an ejection state to a non-ejection state. For example, if the compressed gas supplied to the ejector 10 is interrupted during operation while the ejector 10 is in an ejection state, the shut-off member 22 can be actuated to the locked state, which will displace the valve assembly of the cartridge 14 and place the ejector 10 in a non-ejection state. The shut-off member 22 can be actuated from the unlocked state to the locked state regardless of the operating state of the ejector 10. Even in the case where the actuator power for actuating the valve assembly of the cartridge 14 is interrupted, the shut-off member 22 that actuates the ejector 10 to the non-ejection state can cut off the ejection of the multi-component material, thereby providing a manual cut-off function for such a situation.

[0069] During operation, the injector 10 is assembled by connecting the cartridge 14 to the actuator assembly 12. The manifold 18 is mounted to the cartridge 14 by fasteners 20. The mixing assembly 16 is mounted to the cartridge 14. It can be understood that the mixing assembly 16 can be mounted to the cartridge 14 before the cartridge 14 is mounted to the actuator assembly 12, or it can be mounted to the cartridge 14 after the cartridge 14 is mounted to the actuator assembly 12. Compressed gas is supplied to the injector 10 and enters the spray gun body 30 from the gas connector 26. The component material is pumped to the manifold 18 and enters the manifold from the material inlet 38. The material valve 40 is in the open state so that the component material can flow to the cartridge 14.

[0070] When the stop member 22 is in the unlocked state, the user operates the trigger 24 to move the valve assembly of the cartridge 14, so that the component material flows to the mixing assembly 16. For example, the compressed gas can displace the actuator within the housing 32, thereby displacing the valve assembly. The component material flows to the mixing chamber and is mixed in the mixing chamber to form a multi-component material. The multi-component material is ejected through the ejection port 28 in the form of a spray.

[0071] When the user releases the trigger 24, the injection of the injector 10 can be stopped. When the user releases the trigger 24, the compressed gas can be redirected within the spray gun body 30, so that the actuator is displaced in the opposite direction. The actuator displaces the valve assembly of the cartridge 14 to cut off the flow of the component material to the mixing assembly 16. The injection of the multi-component material through the ejection port 28 stops.

[0072] The injector 10 has significant advantages. The cartridge 14 receives the flow of the component material from the manifold 18 and the flow of the compressed gas from the spray gun body 30. The spray gun body 30 does not handle the component material. The component material does not flow within the spray gun body 30. The spray gun body 30 does not contain any paths that are fluidly connected to the multi-component material path. Isolating the spray gun body 30 from the component material can prevent any accidental mixing within the spray gun body 30 and reduce the number of components that need to be cleaned of the component material after injection. The spray gun body 30 is protected and isolated from the component material, and even if any material path through the injector 10 accidentally solidifies, the spray gun body 30 can still maintain normal operation.

[0073] The cartridge 14 routes the component material and the compressed gas to the mixing assembly 16. The cartridge 14 can be mounted to the spray gun body 30 as an integral device or can be removed from the spray gun body 30. If accidental solidification occurs in the material path of the cartridge 14, the cartridge 14 can be removed from the spray gun body 30 and replaced with a new cartridge 14. The cartridge 14 isolates the component material from the spray gun body 30, thereby protecting the spray gun body 30 and isolating any possible cross-contamination within the cartridge 14 that may cause accidental solidification. The removal and replacement of the cartridge 14 do not require the repair of other components of the injector 10.

[0074] The barrel 14 includes a valve assembly that controls the flow of the component materials to the mixing assembly 16. The valve assembly (including the movable and static parts of the valve assembly) forms part of the barrel 14, and these valve assemblies are mounted to the actuator assembly 12 together with the barrel 14 and are disassembled from the actuator assembly 12 together with the barrel 14. The valve assembly integrated into the barrel 14 facilitates the installation and disassembly of the component handling assembly of the injector 10.

[0075] The manifold 18 is connected to the barrel 14. The manifold 18 does not have any fluid flow path connected to the spray gun body 30. The manifold 18 only routes the component materials to the barrel 14. The component materials are not mixed within the manifold 18, and the manifold 18 does not include any fluid connection between the component material paths.

[0076] The injector 10 includes a spray gun body 30 for routing compressed gas, a manifold 18 for routing component materials, and a barrel 14 for routing component materials to be mixed at the mixing assembly 16, which is supported by the barrel 14 and routes compressed gas for ejection from the injector 10. The barrel 14 can be installed and disassembled as a single unit, allowing for quick and easy assembly and disassembly of the injector 10. Installing the barrel 14 as a single unit reduces the number of parts and the complexity and time required for disassembling and assembling the valve components, since the valve components are part of the barrel 14.

[0077] Figure 2A is a cross-sectional view taken along Figure 1A line 2-2 in Figure 2B showing the injector 10 in a non-spraying state. Figure 1A is a cross-sectional view taken along Figure 3 line 2-2 in Figure 1A showing the injector 10 in a spraying state. Figures 2A - 2B will be discussed in conjunction with Figures 1A - 1C

[0078] ​The injector 10 includes an actuator assembly 12, a cartridge 14, a mixing assembly 16, a manifold 18, a fastener 20, a shutoff 22, a trigger 24, an air fitting 26, a spray tip 28, an air valve 44, a drive piston 46, and a metering piston 48. The actuator assembly 12 includes a spray gun body 30 and a metering piston 48. The drive piston 46 includes a piston shaft 50, a piston head 52, and a drive mount 54. The spray gun body 30 includes a housing 32 and a handle 34. The housing 32 includes a housing mount 56. Flow valves 58a, 58b; valve body 60; outer body 62; valve assembly 64; valve bores 66a, 66b; mixing chamber cavity 68; flow chambers 70a, 70b; air chambers 72a, 72b; gas passage 74b; seals 76a, 76b, retainers 78a, 78b, gas check valve 80b, air valve stem 82, and body mount 84 of the cartridge 14 are shown in the figure. The valve assembly 64 includes valve members 88a, 88b, a coupler 90, and a valve mount 92. Each valve member 88a, 88b includes a flow head 98, a flow neck 100, a member body 102, a mounting neck 104, a mount head 106, and a tail 108. The mixing assembly 16 includes an air cap 36 and a mixing chamber 110. The shutoff 22 includes a knob 42, a converter 112, and a connector 114. The converter 112 includes a converter body 116 and a locator 118. The connector 114 includes a connector head 122 and a connector shaft 120.

[0079] The injector 10 is configured to receive streams of component materials, mix the component materials to form a multi-component material, and eject the resulting multi-component material through the spray tip 28. The injector 10 ejects along a spray axis SA. This axis also represents an upstream side or upstream direction and a downstream side or downstream direction, where the component materials typically flow from the upstream direction to the downstream direction. In the example shown, the first axial direction AD1 is typically the downstream direction, while the second axial direction AD2 is typically the upstream direction relative to the spray axis SA. The mixing chamber 110 (including the spray tip 28) is coaxial with the axis SA.

[0080] The actuator assembly 12 is configured to support the cartridge 14 and actuate the flow valves 58a, 58b of the cartridge 14 between different states. The actuator assembly 12 is configured to support the cartridge through a static interface 126 between the spray gun body 30 and the valve body 60. The actuator assembly 12 is configured to actuate the valve assembly 64 of the cartridge 14 through a dynamic interface 128 between the valve assembly 64 and the drive piston 46.

[0081] In the illustrated example, the static interface 126 is disposed radially outward of the dynamic interface 128. During at least some operating phases, the static interface 126 may overlap the dynamic interface 128 radially. The relative positions of the static interface 126 and the dynamic interface 128 align the forces and enable efficient transfer of mechanical forces along the injection axis SA to the valve assembly 64. During operation, the dynamic interface 128 may move axially relative to the static interface 126.

[0082] The spray gun body 30 is configured to support other components of the injector 10 during injection. The handle 34 is part of the spray gun body 30 and is configured to be held by a user's hand to adjust and manipulate the injector 10. The handle 34 extends from the bottom side of the housing 32. The handle 34 may be formed separately from the housing and connected to the housing 32 by one or more fasteners (e.g., bolts), among other alternative means.

[0083] The housing 32 supports other components of the injector 10. The housing 32 is configured to receive a flow of compressed gas and define a flow path that guides these gases through the injector 10. The compressed gas can be used for various functions, including purging, actuating valves, mixing, and propulsion, among others. The compressed gas can be compressed air, among other options. The compressed gas can be formed from an inert gas (e.g., nitrogen). The gas connector 26 is supported by the housing 32. The gas connector 26 is configured to connect to a hose or other delivery device that supplies compressed gas to the injector 10. The gas connector 26 can be configured to connect to the hose in any desired manner, e.g., by interface threads or a quick-connect means, among others.

[0084] The gas valve 44 is located within the spray gun body 30. In the illustrated example, the gas valve 44 is located within the housing 32. The gas valve 44 is used to direct the compressed gas within the injector 10. The gas valve 44 can be actuated by the trigger 24 to route the compressed gas, thereby actuating the injector 10 between an injection state and a non-injection state. For example, when the trigger 24 is depressed to place the injector 10 in the injection state, the gas valve 44 can route the compressed gas to the first axial direction side of the drive piston 46, causing the drive piston 46 to move along the first axial direction AD1. When the trigger 24 is released to place the injector 10 in the non-injection state, the gas valve 44 can route the compressed gas to the second axial direction side of the drive piston 46, causing the drive piston 46 to move along the second axial direction AD2.

[0085] The trigger 24 is supported by the spray gun body 30. The trigger 24 is located in front of the handle 34 such that a person holding the handle 34 can actuate the trigger 24 with the fingers of the hand holding the handle 34. The trigger 24 is positioned such that the user's fingers can reach the front surface of the trigger 24 to actuate the trigger 24. Actuation of the trigger 24 can actuate a gas valve 44 within the spray gun body 30 to route and / or block compressed gas within the injector 10, thereby opening and / or closing the valve.

[0086] The drive piston 46 is supported by the spray gun body 30. The drive piston 46 is located within the housing 32. The piston head 52 divides the piston chamber within the housing 32 into a plurality of fluidically isolated drive chambers. Compressed gas is routed to the first drive chamber to displace the drive piston 46 in a first axial direction AD1. Compressed gas is routed to the second drive chamber to displace the drive piston 46 in a second axial direction AD2. The drive piston 46 can be regarded as a displacer of the actuator assembly 12.

[0087] The piston shaft 50 extends from the piston head 52 in the first axial direction AD1. The piston shaft 50 extends axially through the spray gun body 30 and is configured to engage with the cartridge 14 at the dynamic interface 128. In the example shown, the piston shaft 50 projects from a shaft hole formed in the housing 32 to form the dynamic interface 128 with the cartridge 14. The drive piston 46 transfers mechanical motion to the valve assembly 64 at the dynamic interface 128 to open and close the material flow path through the cartridge 14. In the example shown, the drive piston 46 is coaxially disposed with the mixing chamber 110 on the spray axis SA.

[0088] The metering piston 48 is located within the drive piston 46. The metering piston 48 is configured to meter solvent into the compressed gas flow routed from the spray gun body 30 to the cartridge 14. The compressed gas provided by the metering piston 48 and the drive piston 46 can be referred to as the B-side gas, which is routed to the component flow path associated with the B-side component material. In the example shown, the metering piston 48 can move relative to the drive piston 46. The metering piston 48 is configured to meter solvent into the B-side gas.

[0089] The cartridge 14 is mounted on the spray gun body 30. As further explained herein, the cartridge 14 can be removed from the spray gun body 30 as an integral structure to facilitate quick replacement of the valve controlling the flow of the component material (e.g., compressed gas) into the mixing chamber 110. The cartridge 14 is mounted on the spray gun body 30 through a static interface 126 between the cartridge 14 and the spray gun body 30. The static interface 126 does not include moving parts. The static interface 126 supports the cartridge 14 on the spray gun body 30. In the illustrated example, the static interface 126 is formed between the cartridge 14 and the housing 32. More specifically, the static interface 126 is formed between the valve body 60 and the housing 32. In the illustrated example, the static interface 126 is formed between a protrusion and a receiver into which the protrusion extends. In the illustrated example, the protrusion 130 is formed by the cartridge 14 and the receiver 132 is formed by the spray gun body 30.

[0090] In the illustrated example, the static interface 126 forms a pneumatic connection between the cartridge 14 and the actuator assembly 12, where compressed gas routed through the spray gun body 30 is further routed into the valve body 60.

[0091] The cartridge seal 124 is located between and engages the cartridge 14 and the spray gun body 30. In the illustrated example, the cartridge seal 124 engages and seals the valve body 60 and the housing 32. The cartridge seal 124 can be an O-ring or a gasket, among other options. The cartridge seal 124 is located within the receiver 132. The cartridge seal 124 can engage the protrusion 130 to allow pressurized gas to be transferred from the spray gun body 30 to the cartridge 14 for purging air. Although the cartridge seal 124 is illustrated as being supported by the spray gun body 30 such that the cartridge 14 can engage or disengage from the cartridge seal 124 during installation and removal, it is understood that the cartridge seal 124 can also be located on the cartridge 14 to be installed and removed with the cartridge 14. For example, the cartridge seal 124 can be provided on the valve body 60 and supported by the valve body 60.

[0092] The valve body 60 defines a flow path for the component materials and the compressed gas. The valve body 60 extends between a first body end 94 and a second body end 96. The valve body 60 extends between the first body end 94 and the second body end 96 along the injection axis SA. The first body end 94 is oriented along a first axial direction AD1. The first body end 94 can be regarded as forming the downstream end of the cartridge 14. The second body end 96 is oriented along a second axial direction AD2. The second body end 96 can be regarded as forming the upstream end of the cartridge 14. The cartridge 14 is configured such that the first body end 94 is the spray output end of the valve body 60, and the spray (e.g., multi-component material, compressed gas) is ejected from the cartridge 14, from the spray output end. The cartridge 14 is configured such that the connection with the actuator assembly 12 (e.g., the drive connection at the dynamic interface 128 and the support connection at the static interface 126) is formed at the second body end 96. In the illustrated example, the valve body 60 does not receive the component material through the second body end 96. In the illustrated example, the valve body 60 receives the compressed gas at the second body end 96. The valve body 60 is configured such that the multi-component material and the compressed gas are output through the first body end 94.

[0093] The body mount 84 is formed on the cartridge 14. In the illustrated example, the body mount 84 is formed on the second body end 96 of the valve body 60. The body mount 84 is configured to engage with the housing mount 56 of the spray gun body 30 to form the static interface 126. For example, the static interface 126 can be formed as a protrusion-receiving interface between the body mount 84 and the housing mount 56, as discussed in more detail below. The static interface 126 supports the cartridge 14 on the spray gun body 30. During the operation of the injector 10, the static interface 126 does not shift along the injection axis SA.

[0094] The outer body 62 is supported on the valve body 60. The outer body 62 forms the exterior of the cartridge 14. The outer body 62 can also be referred to as a cover. In some examples, the outer body 62 is made of a polymer, while the valve body 60 is made of a metal, such as aluminum, etc. In the illustrated example, the outer body 62 is open in both the first axial direction AD1 and the second axial direction AD2, such that the valve body 60 is axially exposed in both directions.

[0095] The mixing chamber cavity 68 is formed within the valve body 60. The mixing chamber cavity 68 extends from the first body end 94 into the valve body 60. The mixing chamber cavity 68 does not extend completely axially through the valve body 60. The mixing chamber cavity 68 is open in the first axial direction AD1 and closed in the second axial direction AD2. The mixing chamber cavity 68 is open in one axial direction such that the mixing chamber 110 cannot pass through the mixing chamber cavity 68. The mixing chamber cavity 68 is configured such that the mixing chamber 110 can enter the mixing chamber cavity 68 through a single opening, which is oriented in the first axial direction AD1. The mixing chamber cavity 68 is open in the downstream direction and closed in the upstream direction, such that the mixing chamber 110 cannot pass through the second body end 96 of the valve body 60.

[0096] The mixing chamber cavity 68 is open in the downstream direction and closed on the upstream side of the barrel 14. The mixing chamber 110 can be inserted into the mixing chamber cavity 68 from the downstream direction or removed from the downstream direction, but cannot be moved in the upstream direction through the barrel 14 and the valve body 60.

[0097] The mixing assembly 16 can be mounted to the barrel 14 and is supported by the barrel 14. In the illustrated example, the mixing assembly 16 is mounted to the valve body 60. In the illustrated example, the mixing assembly 16 is mounted to the first body end 94 of the valve body 60. The air cap 36 is configured to route compressed gas around the injection port 28, for example, for cleaning the injection port 28. The air cap 36 can be mounted to the mixing chamber 110 such that the air cap 36 and the mixing chamber 110 are joined together to form a single assembly. For example, the mixing chamber 110 can include an external thread, and the air cap 36 can include an internal thread such that the air cap 36 can be screwed onto the mixing chamber 110. The mixing assembly 16 is configured such that a user can install the mixing chamber 110 within the mixing chamber cavity 68 by grasping and manipulating the air cap 36 without grasping the mixing chamber 110.

[0098] The air cap 36 is mounted on the barrel 14 and holds the mixing chamber 110 within the mixing chamber cavity 68. In the illustrated example, the air cap 36 includes an external thread that interfaces with an internal thread of the barrel 14 to mount the air cap 36 to the valve body 60. When the mixing assembly 16 is mounted to the barrel 14, the threaded interface between the air cap 36 and the valve body 60 can radially overlap with the external thread on the mixing chamber 110. The air cap 36 can receive compressed gas from the barrel 14 and eject such compressed gas around the mixing chamber 110, for example, near the injection port 28. Such air can be referred to as cleaning air and is configured to remove residues outside the mixing chamber 110.

[0099] The mixing chamber 110 is located within the mixing chamber cavity 68 inside the cartridge 14. More specifically, in the particular embodiment shown, the mixing chamber 110 is mainly located within the valve body 60 and extends partially out of the valve body 60. When the cartridge 14 is installed onto the spray gun body 30, the mixing chamber 110 can be removed from or inserted into the mixing chamber cavity 68. When the cartridge 14 has been disassembled from the spray gun body 30, the mixing chamber 110 can also be removed from or inserted into the mixing chamber cavity 68. Similarly, regardless of whether the mixing chamber 110 is installed onto the cartridge 14, the cartridge 14 can be installed onto or disassembled from the spray gun body 30. Alternatively, during the process of installing the cartridge 14 onto the spray gun body 30, the mixing chamber 110 can be installed within the mixing chamber cavity 68 of the cartridge 14 and the air cap 36 can be attached to the cartridge 14. The cartridge 14 supports the mixing chamber 110 such that the mixing chamber 110 does not contact the spray gun body 30 and does not extend into the interior of the spray gun body 30. In the example shown, the mixing chamber 110 does not radially overlap any part of the spray gun body 30. During the spraying process, the mixing chamber 110 does not contact the spray gun body 30.

[0100] The spray orifice 28 is formed at the downstream end of the mixing chamber 110. In the example shown, the spray orifice 28 is formed by the mixing chamber 110. In the example shown, the mixing chamber 110 is configured as a stationary mixing chamber 110, i.e., the mixing chamber 110 does not translate along the spray axis SA, thereby preventing the ejector 10 from actuating between the spraying state and the non-spraying state. The mixing chamber 110 is configured to remain stationary when the flow valves 58a, 58b are actuated to open and close the flow of the component materials to the mixing chamber 110.

[0101] The valve bores 66a, 66b extend into the valve body 60. In the example shown, the valve bores 66a, 66b only partially axially penetrate the valve body 60. The valve bores 66a, 66b open in the second axial direction AD2 and close in the first axial direction AD1. The valve bores 66a, 66b open to allow the valve members 88a, 88b to enter the valve bores 66a, 66b. The valve bores 66a, 66b close in the first axial direction AD1 such that the valve members 88a, 88b cannot fully axially penetrate the valve bores 66a, 66b.

[0102] Each valve bore 66a, 66b extends along a valve axis VA. In the example shown, the valve axis VA is parallel and radially offset from the spray axis SA. In some examples, a plane can be provided in the cartridge 14 along which the spray axis SA and the two valve axes VA extend.

[0103] The valve bores 66a, 66b extend from the second body end 96 of the valve body 60 into the valve body 60. The valve bores 66a, 66b define a flow path for the component material and the compressed gas to flow into the mixing chamber 110. In the illustrated example, each of the valve bores 66a, 66b leads to a valve body cavity 86 that extends to the second body end 96 of the valve body 60. The valve bores 66a, 66b are radially offset from the injection axis SA. Portions of the valve bores 66a, 66b extend to radially overlap the mixing chamber cavity 68. This structure makes the cartridge 14 more compact.

[0104] The valve bores 66a, 66b respectively include flow chambers 70a, 70b. The flow chambers 70a, 70b are in fluid communication with the manifold 18 for receiving the component material from the manifold 18. Throughout the operation, each of the flow chambers 70a, 70b is in fluid communication with the manifold 18. The flow valves 58a, 58b control the flow of the component material from the flow chambers 70a, 70b to the mixing chamber 110. In the illustrated example, when the mixing assembly 16 is mounted to the cartridge 14, the flow chambers 70a, 70b are spaced apart from the mixing chamber 110 in a second axial direction AD2. The flow chambers 70a, 70b are disposed upstream of the mixing chamber 110 such that the flow chambers 70a, 70b do not radially overlap the mixing chamber 110. In the illustrated example, the configuration of the cartridge 14 is such that when the injector 10 is in a non-injecting state, the flow path containing the component material within the cartridge 14 does not radially overlap the mixing chamber 110.

[0105] In the illustrated example, the valve bores 66a, 66b respectively include gas chambers 72a, 72b. The gas chambers 72a, 72b are in fluid communication with the compressed gas stream supplied to the injector 10. In some examples, one or both of the gas chambers 72a, 72b are in fluid communication with the compressed gas stream to receive the compressed gas throughout the operation of the injector 10 (whether the injector 10 is in an injecting state or the injector 10 is in a non-injecting state). In some examples, one (but not the other) of the gas chambers 72a, 72b is fluidly connected to receive the compressed gas throughout the operation, while the other gas chamber 72a, 72b is configured to receive the compressed gas when the injector 10 is in a non-injecting state.

[0106] Within each of the valve bores 66a, 66b, the flow chambers 70a, 70b and the gas chambers 72a, 72b of the valve bores 66a, 66b are fluidly isolated from each other by respective valve members 88a, 88b. The valve members 88a, 88b are actuatable to fluidly connect the gas chambers 72a, 72b to the mixing chamber 110 when the injector 10 is in a non-injecting state and to fluidly connect the flow chambers 70a, 70b to the mixing chamber 110 when the injector 10 is in an injecting state.

[0107] Feed channels 134a, 134b are formed within the valve body 60. The feed channels 134a, 134b extend respectively between the valve bores 66a, 66b and fluidly connect the valve bores 66a, 66b to the mixing chamber cavity 68. The component material and the compressed gas flow through the feed channels 134a, 134b and into the mixing chamber 110 to enter the mixing chamber 110. In the illustrated example, the feed channels 134a, 134b extend radially outward relative to the injection axis SA. However, it should be understood that not all examples are limited in this way. For example, the feed channels 134a, 134b can extend axially and radially such that the feed channels 134a, 134b extend laterally but not perpendicular to the injection axis SA.

[0108] Gas channels 74a, 74b ( Figure 3 , Figures 7A - Figure 8A and Figure 8C the gas channel 74b shown in Figure 8B and Figure 8C the gas channel 74a shown in) extend within the valve body 60. The gas channels 74a, 74b are respectively used to route the compressed gas to the gas chambers 72a, 72b. The gas channel 74a is fluidly connected to the valve bore 66a, and the gas channel 74b is fluidly connected to the valve bore 66b. The gas channel 74b is fluidly connected to the gas chamber 72b. In the illustrated example, at least a portion of the gas channel 74b is coaxially arranged with the injection axis SA. In the illustrated example, the gas channel 74b does not extend completely axially through the valve body 60.

[0109] The gas check valve 80b is configured to prevent the reverse flow of gas through the gas channel 74b. The gas check valve 80b is configured to allow the compressed gas to flow in the downstream direction and prevent reverse flow in the upstream direction. For example, if the component material leaks into the gas channel of the cartridge 14 or passes through the mixing chamber 110 and expands and cures, the gas check valve 80b will prevent the reverse flow into the air channel in the actuator assembly 12, thereby protecting the actuator assembly 12 from the adverse contamination of the component material.

[0110] The air rod 82 extends between the cartridge 14 and the spray gun body 30 and fluidly connects the cartridge 14 and the spray gun body 30. In the illustrated example, the air rod 82 is configured to route compressed gas to the gas passage 74b. The air rod 82 includes a hole that extends completely axially therethrough and is configured to route compressed gas to the block 61. In the illustrated example, the air rod 82 is formed as a static component that does not move along the injection axis SA during operation. In the illustrated example, the air rod 82 is mounted on the valve body 60, axially extends into the drive piston 46, and engages the drive piston 46 with a sliding interface. When the drive piston 46 moves relative to the air rod 82, the sliding interface of the air rod 82 is a telescopic interface. The air rod 82 extends completely axially through the main body cavity 86 to connect the gas passage 74b and the compressed gas flow path through the drive piston 46. As discussed in more detail below, the gases flowing to the gas passages 74a, 74b are kept fluidly separated within the cartridge 14 to facilitate the introduction of the solvent into the mixing chamber 110 through only one of the compressed gas flows.

[0111] Although the air rod 82 shown in the figures is supported by the valve body 60, it should be understood that not all examples are so limited. For example, the air rod 82 can be connected to the drive piston 46 and extend into the valve body 60. In this example, the air rod 82 can move relative to the valve body 60 along the injection axis SA with the drive piston 46. In this example, the air rod 82 can telescope relative to the static valve body 60. In this example, the gas check valve 80b can be provided within the drive piston 46.

[0112] A valve main body cavity 86 is formed within the valve body 60. The valve main body cavity 86 opens in the second axial direction AD2. The valve holes 66a, 66b both lead to the valve main body cavity 86. The coupler 90 of the valve assembly 64 is at least partially disposed within the valve main body cavity 86. The valve main body cavity 86 provides an open volume for the coupler 90 to reciprocate along the injection axis SA, which will be discussed in more detail below.

[0113] Sealing bodies 76a, 76b are respectively disposed within the valve holes 66a, 66b. Each sealing body 76a, 76b is mounted within the corresponding valve hole 66a, 66b. The sealing bodies 76a, 76b are configured to engage the valve members 88a, 88b respectively to open and close the flow paths for the compressed gas and the component materials to flow to the mixing chamber 110. In the illustrated example, each sealing body 76a, 76b is formed by a plurality of components mounted within the valve holes 66a, 66b. However, it should be understood that not all examples are so limited. For example, the sealing bodies 76a, 76b can be integrally formed, among other options.

[0114] The seals 76a, 76b can form the valve seats of the flow valves 58a, 58b. The movable parts (e.g., valve members 88a, 88b) of the flow valves 58a, 58b can move relative to the seals 76a, 76b to open or close the flow paths flowing through the flow valves 58a, 58b. In the illustrated example, each of the seals 76a, 76b can be regarded as forming a material seat, and the valve members 88a, 88b can engage therewith to cut off the flow of the component material, and the valve members 88a, 88b can disengage therefrom to allow the component material to flow into the mixing chamber 110. Each of the seals 76a, 76b can also be regarded as forming a gas seat, and the valve members 88a, 88b can engage therewith to cut off the flow of the compressed gas, and the valve members 88a, 88b can disengage therefrom to allow the compressed gas to flow into the mixing chamber 110.

[0115] The retainers 78a, 78b are mounted on the valve body 60. The retainers 78a, 78b are respectively mounted on the valve holes 66a, 66b. For example, each of the retainers 78a, 78b can be mounted on the valve body 60 by means of a threaded interface or the like. The retainers 78a, 78b are respectively used to hold the seals 76a and 76b within the valve holes 66a, 66b.

[0116] The shaft seal 136 is supported by the retainers 78a, 78b. The shaft seal 136 is configured to engage with the outer surfaces of the valve members 88a, 88b so as to seal with the outer surfaces of the valve members 88a, 88b. When the valve members 88a, 88b move relative to the shaft seal 136 during operation, the shaft seal 136 engages with the valve members 88a, 88b at the dynamic seal interface. Due to the existence of a sliding interface between the shaft seal 136 and the valve members 88a, 88b, the shaft seal 136 can be regarded as forming a sliding seal. The shaft seal 136 engages with the valve members 88a, 88b to prevent the component material from leaking from the valve holes 66a, 66b along the second axial direction AD2.

[0117] The valve assembly 64 is used to control the flow of the component material and the compressed gas into the mixing chamber 110. The valve assembly 64 is connected to the drive piston 46 at the dynamic interface 128. The drive piston 46 can axially move the valve assembly 64 along the injection axis SA, so as to switch the injector 10 between the non-injection state and the injection state. The valve assembly 64 can be transferred along the injection axis SA, so as to actuate the flow valves 58a, 58b between the first open state, the second open state and the closed state. The valve assembly 64 is supported by the valve body 60.

[0118] When the flow valves 58a, 58b are in the first open state (such as Figure 2AWhen in the state shown (not shown), the air chambers 72a, 72b are in fluid connection with the mixing chamber 110, such that compressed gas can flow into the mixing chamber 110 and be ejected through the ejection orifice 28. Such compressed gas can also be referred to as purge gas. The purge gas flowing through the mixing chamber 110 can blow out any residual material in the mixing chamber 110, thereby preventing unnecessary curing from occurring within the mixing chamber 110. When the flow valves 58a, 58b are respectively in the first open state, the flow chambers 70a, 70b are in fluid disconnection from the mixing chamber 110, such that the component materials cannot flow into the mixing chamber 110.

[0119] When the flow valves 58a, 58b are in the second open state (as Figure 2B shown), the air chambers 72a, 72b are in fluid disconnection from the mixing chamber 110, thereby preventing compressed gas from flowing into the mixing chamber 110. When the flow valves 58a, 58b are in the second open state, the flow chambers 70a, 70b are in fluid connection with the mixing chamber 110, such that the component materials can flow into the mixing chamber 110, be mixed within the mixing holes 138 of the mixing chamber 110 to form a multi-component material, and be ejected as a spray of the multi-component material from the ejection orifice 28.

[0120] When the flow valves 58a, 58b are in the closed state, both the air chambers 72a, 72b and the flow chambers 70a, 70b are in fluid disconnection from the mixing chamber 110. The flow valves 58a, 58b being in the closed state can prevent the component materials and the compressed gas from flowing into the mixing chamber 110. The flow valves 58a, 58b experience the closed state between the first open state and the second open state. The flow valves 58a, 58b move from the first open state to the closed state and then to the second open state to allow the component materials to flow to the mixing chamber 110. The flow valves 58a, 58b move from the second open state to the closed state and then to the first open state to cut off the flow of the component materials and allow the compressed gas to flow to the mixing chamber 110. The flow valves 58a, 58b being in the closed state between the first and second open states can prevent cross-flow between the flow chambers 70a, 70b and the air chambers 72a, 72b.

[0121] The valve assembly 64 is composed of valve members 88a, 88b mounted on the coupler 90. In the illustrated example, each of the valve members 88a, 88b is formed as a shuttle configured to axially transfer along the valve axis VA. The valve members 88a, 88b form a movable valve assembly of the cartridge 14. The valve members 88a, 88b form a movable valve assembly of the flow valves 58a, 58b. Each of the valve members 88a, 88b can move along the valve axis VA. In the illustrated example, the valve axis VA is radially offset from the ejection axis SA and is arranged parallel to the ejection axis SA. The valve members 88a, 88b can move along the valve axis VA so as to actuate the flow valves 58a, 58b between the corresponding first open state, closed state, and second open state.

[0122] The movement of valve member 88a (e.g., parallel to the injection axis SA) opens and closes flow valve 58a. Flow valve 58a routes component A ingredient material or compressed gas to mixing chamber 110 through feed passage 134a according to the state of flow valve 58a. The state of flow valve 58a depends on whether valve member 88a is in the first position, the second position, or the third position. When valve member 88a is in the first position ( Figure 2A ), flow valve 58a is in the first open state. When valve member 88a is in the second position ( Figure 2B ), flow valve 58a is in the second open state. When valve member 88 is in the third position (axially between the first position and the second position), flow valve 58a is in the closed state.

[0123] The movement of valve member 88b (e.g., parallel to the injection axis SA) opens and closes flow valve 58b. Flow valve 58b routes component B ingredient material or compressed gas to mixing chamber 110 through feed passage 134b according to the state of flow valve 58b. The state of flow valve 58b depends on whether valve member 88b is in the first position, the second position, or the third position. When valve member 88b is in the first position ( Figure 2A ), flow valve 58b is in the first open state. When valve member 88b is in the second position ( Figure 2B ), flow valve 58b is in the second open state. When valve member 88b is in the third position (axially between the first position and the second position), flow valve 58b is in the closed state.

[0124] Each valve member 88a, 88b includes a flow head 98, a flow neck 100, a member body 102, a mounting neck 104, a mounting head 106, and a tail 108. The flow head 98 is configured to engage with the seal body 76 (e.g., directly engage with the seal body 76 or engage with a seal supported by the seal body 76) to control the flow of ingredient material and compressed gas to the mixing chamber 110. The flow neck 100 extends between and connects the flow head 98 and the member body 102. The diameter of the flow neck 100 is smaller than that of the flow head 98. When the flow valve 58 is in the second open state, the diameter of the flow neck 100 is smaller than that of the flow head 98, which enables the ingredient material to flow around the flow neck 100 and into the mixing chamber 110.

[0125] The component body 102 extends axially between the flow neck 100 and the mounting neck 104. The component body 102 is connected to the shaft seal 136. The component body 102 is configured to axially slide relative to the shaft seal 136 and engage the shaft seal 136 when the flow valves 58a, 58b are in the first open state, the second open state, and the closed state. The component body 102 is connected to the flow neck 100 at a position within the valve body 60 and axially extends out corresponding valve holes 66a, 66b. In the illustrated example, the diameter of the component body 102 is larger than that of the flow neck 100.

[0126] The mounting neck 104 extends axially between the component body 102 and the mounting head 106. The mounting neck 104 axially extends through the coupler 90. The mounting neck 104 is configured to be disposed within the slot of the coupler 90 to mount the valve members 88a, 88b to the coupler 90. The diameter of the mounting neck 104 is smaller than the diameters of the component body 102 and the mounting head 106. The relatively larger diameters of the component body 102 and the mounting head 106 with respect to the mounting neck 104 facilitate the coupler 90 to transfer the driving force to the valve members 88a, 88b, causing the valve members 88a, 88b to displace along the first axial direction AD1 or the second axial direction AD2. The coupler 90 applies an axial driving force to the component body 102, causing the valve members 88a, 88b to displace along the first axial direction AD1. The coupler 90 applies an axial driving force to the mounting head 106 to cause the valve members 88a, 88b to displace along the second axial direction.

[0127] In the illustrated example, the valve members 88a, 88b include tails 108 that axially extend from the mounting head 106. The tails 108 axially project away from the mounting neck 104 and are disposed on the axial side of the mounting head 106 opposite to the mounting neck 104. The tails 108 are configured to provide a tool interface to facilitate the removal of the valve assembly 64 from the cartridge 14, for example, for cleaning or replacement. For example, after the cartridge 14 is disassembled from the spray gun body 30, the tails 108 can be grasped with pliers and pulled along the second axial direction AD2, thereby pulling the valve assembly 64 along the second axial direction AD2 and removing the valve assembly 64 from the cartridge 14.

[0128] It should be noted that the valve members 88a, 88b in this embodiment are shown as a single piece, but in alternative embodiments, the valve members can be composed of multiple parts fixed to each other. Each valve member 88a, 88b can include a head separated from the valve body and / or a tail separated from the valve body, etc.

[0129] Each valve member 88a, 88b extends into the valve bores 66a, 66b, but does not pass through the valve bores. The valve members 88a, 88b are configured to engage with the seal bodies 76a, 76b to seal the flow paths leading to the mixing chamber 110. When the flow valves 58a, 58b are in the first open state, the flow head 98 engages with a portion of the seal bodies 76a, 76b that is spaced apart from the feed channels 134a, 134b in the second axial direction AD2. When the flow valves 58a, 58b are in the second open state, the flow head 98 engages with a portion of the seal bodies 76a, 76b that is spaced apart from the feed channels 134a, 134b in the first axial direction AD1. When the flow valves 58a, 58b are in the closed state, the flow head 98 engages with portions of the seal bodies 76a, 76b on axially opposite sides of the feed channels 134a, 134b. When the flow valves 58a, 58b are in the closed state, the flow head 98 radially overlaps and covers the feed channels 134a, 134b.

[0130] The valve members 88a, 88b are connected to the coupler 90 so as to be actuated simultaneously along the valve axis VA. The coupler 90 is at least partially disposed within the valve body cavity 86 and is movable relative to the valve body 60. The coupler 90 is connected to the drive piston 46 through the dynamic interface 128. The dynamic interface 128 transmits the mechanical movement of the drive piston 46 to the coupler 90, thereby causing displacement of the valve members 88a, 88b and in turn actuating the flow valves 58a, 58b between different operating states.

[0131] The cartridge 14 includes a valve mount 92 that is connected to the drive mount 54 of the drive piston 46, thereby forming the dynamic interface 128 between the cartridge 14 and the spray gun body 30. The dynamic interface 128 transmits mechanical movement to actuate the flow valves 58a, 58b between different states. As part of the dynamic interface 128, the valve mount 92 is movable relative to the static interface 126 between the cartridge 14 and the spray gun body 30. The dynamic interface 128 is configured to axially transfer along the injection axis SA during operation of the injector 10. In the illustrated example, the valve mount 92 is formed on the coupler 90.

[0132] The manifold 18 is mounted on the cartridge 14. In the illustrated example, the manifold 18 is mounted to the cartridge 14 such that the entire weight of the manifold 18 is supported by the cartridge 14. The entire weight of the manifold 18 is transmitted through the cartridge 14 to the spray gun body 30. In the illustrated example, the fastener 20 extends through the manifold 18 and into the valve body 60 to mount the manifold 18 to the valve body 60. The fastener 20 secures the manifold 18 to the valve body 60.

[0133] The shut-off member 22 is supported by the spray gun body 30. The shut-off member 22 is connected to the drive piston 46. The shut-off member 22 is connected to the valve assembly 64 via the drive piston 46. The connector 114 is connected to the drive piston 46. In the illustrated example, the connector head 122 is at least partially disposed within the piston head 52 of the drive piston 46. The connector head 122 is connected to the drive piston 46 such that the connector 114 and the drive piston 46 move simultaneously along the injection axis SA. The connector shaft 120 extends in a second axial direction AD2 away from the drive piston 46.

[0134] The converter 112 extends between the knob 42 and the connector 114 and connects the two. The converter 112 is configured to convert the rotational movement of the knob 42 into an axial movement of the connector 114, and thus into an axial movement of the drive piston 46 and the valve assembly 64. In the illustrated example, the converter body 116 is connected to the knob 42 by a stop fastener 142. The stop fastener 142 fixes the converter body 116 and the knob 42 together. The converter body 116 is connected to the knob 42 for simultaneous rotation, so that rotating the knob 42 causes the converter body 116 to rotate. In the illustrated example, the converter 112 is coaxially disposed with the injection axis SA, and the converter body 116 is configured to rotate about the injection axis SA.

[0135] The locator 118 is supported by the connector 114. In the illustrated example, the locator 118 is supported by the connector shaft 120. More specifically, in the illustrated example, the locator 118 extends through the connector shaft 120. The locator 118 extends radially outward from the connector shaft 120. The locator 118 is connected to the converter body 116. The locator 118 and the converter body 116 together convert the rotational movement of the knob 42 into an axial movement of the connector 114 along the injection axis SA. The locator 118 extends into a slot formed in the converter body 116, as described below.

[0136] The knob 42 is located outside the spray gun body 30 and can be operated from outside the injector 10. The user can control the actuation of the shut-off member 22 between the locked and unlocked states via the knob 42. The knob 42 is configured to be rotatable about the injection axis SA to control the actuation of the shut-off member 22 between the locked and unlocked states. When the shut-off member 22 is in the locked state, the injector 10 is locked in the non-injection state, such that the valve assembly within the cartridge 14 cannot be actuated to open the flow path for the component material to the mixing chamber 110. When the shut-off member is in the unlocked state, the drive piston 46 can move along the injection axis SA, and the injector 10 can be in the injection state, such that the valve assembly within the cartridge 14 can be actuated to open the flow path for the component material to the mixing assembly 16. In the illustrated example, the knob 42 provides a user interface for the shut-off member 22.

[0137] During operation, the trigger 24 is actuated and released, causing the injector 10 to actuate between a non-injecting state and an injecting state. Compressed gas is directed to opposite sides of the piston head 52 of the drive piston 46, causing the drive piston 46 to axially displace and causing the flow valves 58a, 58b to actuate between various operating states. The injector 10 is initially in Figure 2A the non-injecting state shown. Compressed gas is supplied to the injector 10 through the gas connector 26 and routed through the spray gun body 30 to the cartridge 14. The component materials are supplied to the manifold 18 and routed from the manifold 18 to the cartridge 14.

[0138] When the injector 10 is in the non-injecting state, each flow valve 58a, 58b is in a first open state. The component materials can flow to the flow chambers 70a, 70b, but are blocked by the valve members 88a, 88b from flowing downstream to the mixing chamber 110. Compressed gas flows to the gas chambers 72a, 72b and can flow through the feed channels 134a, 134b to the mixing chamber 110.

[0139] Actuation of the trigger 24 causes the gas valve 44 to direct compressed gas to the chamber on the side of the piston head 52 oriented in the second axial direction AD2. The compressed gas causes the drive piston 46 to move in the first axial direction AD1 (downstream direction). The drive piston 46 causes the valve assembly 64 to move in the first axial direction AD1. The drive piston 46 applies an axial force to the valve assembly 64 at the dynamic interface 128 and causes the valve assembly 64 to move in the first axial direction AD1. In the example shown, the drive piston 46 applies an axial force to the connector 90. The connector 90 applies an axial driving force to the valve members 88a, 88b, causing the valve members 88a, 88b to axially displace.

[0140] The valve members 88a, 88b are respectively displaced to a second position ( Figure 2B ). When the valve member 88a is in the second position, the A-component liquid can flow from the flow chamber 70a (which receives the A-component liquid from the material inlet 38a of the manifold 18) to the feed channel 134a and into the mixing chamber 110. When the valve member 88a is in the second position, the flow path of compressed gas from the gas chamber 72a to the feed channel 134a and into the mixing chamber 110 is cut off. When the valve member 88a is in the second position, the gas chamber 72a can be pressurized by compressed gas, but is fluidly blocked by the valve member 88a from flowing into the feed channel 134a. The state in which the valve member 88a is in the second position corresponds to the state in which the trigger 24 is actuated for injection, and such actuation causes the drive piston 46 to be in the second injection position (e.g., forward or downstream direction in this case).

[0141] When the valve member 88b is in the second position, the B-component liquid can flow from the flow chamber 70b (which receives the B-component liquid from the material inlet 38b of the manifold 18) to the feed channel 134b and enter the mixing chamber 110. When the valve member 88b is in the second position, it cuts off the flow path of the compressed gas from the gas chamber 72b to the feed channel 134b and into the mixing chamber 110. When the valve member 88b is in the second position, the compressed gas chamber 72b can pressurize the compressed gas, but it blocks its inflow into the feed channel 134b through the valve member 88b. The state where the valve member 88b is in the second position corresponds to the state where the trigger 24 is actuated for ejection, and this actuation positions the drive piston 46 in the second ejection position (e.g., in the forward or downstream direction in this example).

[0142] The component materials flow from the flow chambers 70a, 70b to the feed channels 134a, 134b. The component materials enter the mixing chamber 110 through the chamber holes 140a, 140b aligned with the feed channels 134a, 134b and interact with each other within the mixing holes 138 to form the multi-component material. The multi-component material flows through the mixing holes 138 and is ejected from the ejection orifice 28. When the flow valves 58a, 58b are in the second open state respectively, the compressed gas can flow to the gas cap 36 and be ejected from positions around the ejection orifice 28.

[0143] Releasing the trigger 24 stops the ejection of the injector 10. Releasing the trigger 24 causes the gas valve 44 to move, introducing the compressed gas into a chamber in the housing 32 on the side of the piston head 52 oriented along the first axial direction AD1. The compressed gas supplied to this chamber exerts an axial force on the drive piston 46, displacing it along the second axial direction AD2. In addition, the gas valve 44 fluidly connects another chamber in the housing 32 with the exhaust port 144 passing through the handle 34 to expel the compressed gas in the injector 10.

[0144] Releasing the trigger 24 causes the compressed gas to move the drive piston 46 to the first non-ejection position (e.g., in the backward or upstream direction in this example). In this particular embodiment, the first position of the drive piston 46 is in the upstream direction, while the second position of the drive piston 46 is in the downstream direction. This movement of the piston 46 along the second axial direction AD2 causes the valve members 88a, 88b to move to their respective first positions. The drive piston 46 displaces the valve assembly 64 along the second axial direction AD2. The drive piston 46 exerts an axial force on the valve assembly 64 at the dynamic interface 128 and positions the valve assembly 64 along the second axial direction AD2. In the illustrated example, the drive piston 46 exerts an axial force on the connector 90, and the connector 90 exerts an axial driving force on the valve members 88a, 88b, causing the valve members 88a, 88b to axially displace backward.

[0145] When the valve member 88a moves to the first position, which is more upstream than the second position, for example, when the trigger 24 is released, the valve member 88a moves to relieve the blockage of the flow of the air chamber 72a to the feed channel 134a, thereby introducing compressed gas into the mixing chamber 110. However, this positioning re-blocks the flow of component A liquid from the flow chamber 70a to the feed channel 134a. In the example shown, the valve member 88a switches to the third position before returning from the second position to the first position. When the valve member 88a is in the third position, associated with the closed state of the flow valve 58a, the flow of compressed gas from the air chamber 72a to the mixing chamber 110 is blocked, and the flow of component A liquid from the flow chamber 70a to the mixing chamber 110 is also blocked.

[0146] When the ejector 10 ejects from the ejection port 28, the valve member 88a is in one of two positions: the second position allows component A liquid to flow into the mixing chamber 110 for ejection while blocking the flow of compressed gas into the mixing chamber 110; the first position blocks the flow of component A liquid into the mixing chamber 110 while allowing compressed gas to flow into the mixing chamber 110 for purging. Actuation of the trigger 24 causes the valve member 88a to move to the second position, while release of the trigger 24 causes the valve member 88a to move to the first position.

[0147] When the valve member 88b moves to the first position, which is more upstream than the second position, for example, when the trigger 24 is released, the valve member 88b moves to relieve the blockage of the flow of the air chamber 72b to the feed channel 134b, thereby introducing compressed gas into the mixing chamber 110. However, this positioning re-blocks the flow of component B liquid from the flow chamber 70b to the feed channel 134b. In the example shown, the valve member 88b switches to the third position associated with the closed state of the flow valve 58b before returning from the second position to the first position. When the valve member 88b is in the third position, the flow of compressed gas from the air chamber 72b to the mixing chamber 110 is blocked, and the flow of component B liquid from the flow chamber 70b to the mixing chamber 110 is also blocked.

[0148] When the ejector 10 ejects from the ejection port 28, the valve member 88b is in one of two positions: the second position allows component B liquid to flow into the mixing chamber 110 for ejection while blocking the flow of compressed gas into the mixing chamber 110; the first position blocks the flow of component B liquid into the mixing chamber 110 while allowing compressed gas to flow into the mixing chamber 110 for purging. Actuation of the trigger 24 causes the valve member 88b to move to the second position, while release of the trigger 24 causes the valve member 88b to move to the first position.

[0149] Each valve member 88 is mounted on a coupler 90 for simultaneous actuation. The mechanical movement of the drive piston 46 is transmitted from the actuator assembly 12 to the cartridge 14 through the dynamic interface 128, causing the flow valves 58a, 58b to actuate between different states. The drive piston 46 is directly connected to the coupler 90 or indirectly connected to the coupler 90 through one or more intermediate components, depending on the embodiment. The valve members 88a, 88b are directly or indirectly connected to the coupler 90. Thus, actuation of the trigger 24 causes the drive piston 46 to move between a first position and a second position, which causes the valve members 88a, 88b to move to the first position or the second position accordingly, thereby blocking and unblocking the flow of component liquids A and B and compressed gas to the mixing chamber 110. The dynamic interface 128 can be disconnected to remove the cartridge 14 from the spray gun body 30, as further discussed herein.

[0150] Although the mechanical movement for moving the valve members 88a, 88b is from a pneumatic operation initiated by the trigger 24, in rare cases, the ejector 10 may lose air pressure during the ejection state and the ejection process. Since the trigger 24 cannot pneumatically drive the drive piston 46 through the air valve 44, it is necessary to quickly manually shut off the flow of the component materials to stop the ejection of the multi-component materials. This movement is provided by the shut-off member 22. The user can actuate the shut-off member 22 through the knob 42. The knob 42 can be located on the rear side or the upstream side of the spray gun body 30, opposite the ejection orifice 28. The knob 42 can be rotated about the ejection axis SA, among other options. Actuation of the knob 42 provides a mechanical input to the converter 112. In this embodiment, the converter 112 converts the rotational movement into a linear movement. More specifically, the knob 42 can be rotated, thereby providing a rotational input to the converter body 116. The converter body 116 moves the locator 118 along a slot formed in the converter body 116, thereby applying an axial driving force to the locator 118. The locator 118 is connected to the connector 114 to apply an axial driving force to the connector 114. The connector 114 is attached to the drive piston 46 and can mechanically move the drive piston 46.

[0151] The cutoff member 22 is attached to the drive piston 46 and can move the drive piston 46 in a second axial direction AD2, thereby pulling the valve members 88a, 88b rearward, and further actuating the flow valves 58a and cutting off the flow of component A to the mixing chamber 110, and actuating the flow valve 58b and cutting off the flow of component B to the mixing chamber 110. The locator 118 can include pins, knobs, or other protrusions that are connected to the helical structure of the converter body 116. The helical structure can partially or fully surround the injection axis SA, among other options. The locator 118 can be fixed to be linearly translatable only along the injection axis SA, such that engagement with the rotating helical structure causes the pins, knobs, or other protrusions to linearly move along the injection axis SA. The locator 118 can be directly or indirectly connected to the drive piston 46 (connected through the connector 114 in the illustrated example), where the drive piston 46 is indirectly connected to the valve members 88a, 88b through the coupler 90.

[0152] The cartridge 14 is coaxially disposed on the injection axis SA with the cutoff member 22 and the drive piston 46. The cartridge 14 is configured to be transferred relative to the spray gun body 30 in a second axial direction AD2 when installed on the actuator assembly 12, and the cartridge 14 is configured to be transferred relative to the spray gun body 30 in a first axial direction AD1 when removed from the actuator assembly 12. The mixing chamber cavity 68 is coaxially disposed with the piston hole 146, and the piston shaft 50 of the drive piston 46 passes through the piston hole 146 and engages the valve assembly 64 at the dynamic interface 128.

[0153] In the illustrated example, the cartridge 14 engages the actuator assembly 12 at three different positions. The first interface is formed at the static interface 126 between the valve body 60 and the spray gun body 30. The static interface 126 connects the cartridge 14 to the spray gun body 30 to fix the cartridge 14 to the spray gun body 30. The second interface is formed at the dynamic interface 128 between the valve assembly 64 and the drive piston 46. The dynamic interface 128 transmits mechanical force from the actuator assembly 12 to the cartridge 14 to actuate the flow valves 58a, 58b between different operating states, thereby controlling the flow of component materials and compressed gas to the mixing chamber 110. The third interface is formed between the cartridge 14 and the drive piston 46. More specifically, the third interface is formed between the air rod 82 and the drive piston 46. The third interface does not transmit mechanical driving force between the actuator assembly 12 and the cartridge 14. In the illustrated example, the third interface is formed as a telescopic interface, where the components of the actuator assembly 12 move relative to the components of the cartridge 14 (in the illustrated example, the drive piston 46 moves relative to the air rod 82). Compressed gas is transmitted from the actuator assembly 12 to the cartridge 14 at the third interface.

[0154] The injector 10 has significant advantages. The cartridge 14 is mounted to the actuator assembly 12 at the static interface 126 and the dynamic interface 128. The static interface 126 connects the cartridge 14 to the gun body 30 and mechanically supports the cartridge 14 on the gun body 30. The dynamic interface 128 transfers mechanical motion from the drive piston 46 to the valve assembly 64, thereby actuating the flow valves 58a, 58b between different operating states. Both the static interface 126 and the dynamic interface 128 are formed during the installation of the cartridge 14 and disconnected during the removal of the cartridge 14. The static interface 126 and the dynamic interface 128 make the installation and removal of the cartridge 14 easy and quick.

[0155] The cartridge 14 includes the flow valves 58a, 58b such that the flow valves 58a, 58b can be installed and removed together with the cartridge 14. Thus, the flow valves 58a, 58b that control the flow of the component materials to the mixing chamber 110 can be installed and removed together with the cartridge 14. The complete containment of the flow valves 58a, 58b within the cartridge 14 allows for the quick and simple removal and replacement of the valve assembly, for example, by installing a new cartridge 14.

[0156] The stop member 22 can lock the injector 10 in a non-injecting state to prevent the injector 10 from being actuated to the injecting state. The stop member 22 can also actuate the flow valves 58a, 58b to cut off the flow of the component materials to the mixing chamber 110. The stop member 22 provides a single mechanism that can both lock the injector 10 in the injecting state and provide actuation in the event of loss of power to the drive piston 46. The structure of the stop member 22 is simple and can be easily operated by the user, and multiple functions can be achieved through a single component.

[0157] Figure 4A is Figure 3 an enlarged view of detail 4A in. Figure 4B is a cross-sectional view taken along Figure 3 line 4B-4B in, showing the interface between the cartridge 14 and the manifold 18. Figure 4A and 4B will be discussed together and continue to refer to Figures 1A - 3。The cartridge 14, manifold 18, fasteners 20, and spray gun body 30 of the injector 10 are shown in the figure. The valve body 60, valve holes 66a, 66b; cartridge inlets 148a, 148b; inlet check valves 150a, 150b; hole inlets 152a, 152b; and fastener openings 154 of the cartridge 14 are shown. Each cartridge inlet 148a, 148b includes an inlet body 156, an inlet hole 158, an inlet seal 160, a shoulder l62, and a flange 164. The manifold body 166, manifold valves 168a, 168b, manifold channels 170a, 170b, manifold brackets 172, valve caps 174a, 174b, and valve housings 176a, 176b of the manifold 18 are shown. The body slot 178 of the spray gun body 30 is also shown in the figure.

[0158] The manifold 18 can be connected to a component material pipeline to receive component materials from a pump. The manifold 18 is configured to route the component materials to the cartridge 14. The manifold body 166 supports the other components of the manifold 18. The manifold channels 170a, 170b define the flow paths for the component materials to flow to the cartridge 14. The manifold channels 170a, 170b are fluidly isolated from each other within the manifold body 166. The component materials are isolated from each other within the manifold body 166 and do not mix within the manifold body 166.

[0159] The manifold bracket 172 is formed by the manifold body 166. The manifold bracket 172 projects from the other parts of the manifold body 166. The manifold bracket 172 is configured to engage with a part of the spray gun body 30, where the manifold 18 is mounted to the cartridge 14. In the example shown, the manifold bracket 172 extends into the body slot 178 formed in the housing 32 of the spray gun body 30. The body slot 178 is formed on the lower side of the housing 32. The manifold bracket 172 extends into the body slot 178 and can engage with the part of the spray gun body 30 that forms the body slot 178. The manifold bracket 172 engaging with the spray gun body 30 within the body slot 178 inhibits the rotation of the cartridge 14 relative to the spray gun body 30 and about the spray axis SA during the operation of the injector 10. Removing the manifold 18 from the cartridge 14 allows the cartridge 14 to rotate relative to the spray gun body 30 to mount the cartridge 14 onto the spray gun body 30 or dismount it from the spray gun body 30. It can be understood that although the manifold 18 can directly engage with the spray gun body 30 to lock the orientation of the cartridge 14 during operation, the manifold 18 is not directly connected to the spray gun body 30; instead, the manifold 18 is directly mounted onto the cartridge 14 such that the cartridge 14 fully supports the manifold 18.

[0160] Manifold valves 168a and 168b are respectively disposed within manifold passages 170a and 170b. Manifold valves 168a and 168b are configured as normally closed valves and are actuated to an open state by cartridge 14. Manifold valves 168a and 168b are not check valves that open and close with respect to fluid flow relative to the cartridge. Instead, manifold valves 168a and 168b are configured to remain in their respective closed states until actuated to open by cartridge 14, which is connected to and drives manifold valves 168a and 168b to their respective open states. Cartridge 14 can hold manifold valves 168a and 168b in their respective open states for the entire time that the manifold 18 is attached to cartridge 14. In the illustrated example, manifold valves 168a and 168b are spring-biased ball valves, but it is understood that other configurations are possible.

[0161] Valve housings 176a and 176b are mounted to manifold body 166. Valve housing 176a is at least partially disposed within manifold passage 170a. Valve housing 176b is at least partially disposed within manifold passage 170b. Valve housings 176a and 176b include an array of openings through which constituent material can enter valve housings 176a and 176b from the associated manifold passages 170a and 170b. Valve caps 174a and 174b are mounted to manifold body 166. Valve caps 174a and 174b can form seats for the movable valve assemblies (e.g., the balls in the illustrated example) of manifold valves 168a and 168b.

[0162] Cartridge inlets 148a and 148b project from valve body 60. In the illustrated example, cartridge inlets 148a and 148b project from block 61 of valve body 60. Cartridge inlet 14a projects from valve body 60 at a first position between first body end 94 and second body end 96. Cartridge inlet 14b projects from valve body 60 at a second position between first body end 94 and second body end 96. Cartridge inlets 148a and 148b may also be referred to as material inlets for receiving constituent material into cartridge 14. In the illustrated example, cartridge inlets 148a and 148b project vertically downward away from valve body 60. When cartridge inlets 148a and 148b project from valve body 60, cartridge inlets 148a and 148b also project away from injection axis SA. Cartridge inlets 148a and 148b are radially offset from injection axis SA. Cartridge inlets 148a and 148b are in fluid communication with valve bores 66a and 66b respectively through hole inlets 152a and 152b formed in valve body 60. Hole inlets 152a and 152b extend radially with respect to valve axes VA of valve bores 66a and 66b with which hole inlets 152a and 152b are in fluid connection. Hole inlets 152a and 152b define flow paths for constituent material to flow from cartridge inlets 148a and 148b to flow chambers 70a and 70b of valve bores 66a and 66b.

[0163] In the illustrated example, the barrel 14 is configured such that the first and second component materials do not enter the barrel 14 through either axial end of the barrel 14. The first and second component materials do not enter the valve body 60 through the first body end 94 or the second body end 96.

[0164] In the illustrated example, the hole inlet 152a, the flow chamber 70a, and the feed channel 134a form a material flow path for the first component material to flow within the valve body 60 and to mix the mixing chamber cavity 68 with the flow valve 58a in the second open state. In the illustrated example, the hole inlet 152b, the flow chamber 70b, and the feed channel 134b form a material flow path for the second component material to flow within the valve body 60 and to mix the mixing chamber cavity 68 with the flow valve 58b in the second open state.

[0165] For each barrel inlet 148a and 148b, the inlet body 156 is connected to the valve body 60. The inlet body 156 defines a flow path for the component material to flow to the respective valve holes 66a, 66b. The inlet body 156 can be connected to the valve body 60 in any desired manner, such as by interface threads, among other options. In some examples, the inlet body 156 can be integrally formed with the valve body 60. The inlet body 156 projects from the lower side 180 of the valve body 60. The inlet body 156 projects outwardly, away from the valve body 60. In the illustrated example, each inlet body 156 forms a separate projection that extends away from the valve body 60.

[0166] The inlet hole 158 is formed through the inlet body 156. The inlet hole 158 forms an opening through which the component material enters the barrel 14 from the manifold 18. In the illustrated example, each barrel inlet 148a, 148b includes an array of inlet holes 158 disposed around the inlet body 156. In the illustrated example, each inlet body l56 includes a plurality of inlet holes 158.

[0167] The shoulder 162 is formed by the inlet body 156. The shoulder 162 projects inwardly within the inlet body 156 and forms a seat for the inlet check valves 150a, 150b for the barrel inlets 148a, 148b. The inlet seal 160 is disposed outside the barrel inlets 148a, 148b. The inlet seal 160 is configured to engage with the manifold 18 to prevent leakage of the component material between the inlet body 156 and the manifold 18. In the illustrated example, the inlet seal 160 is supported by the inlet body 156 and engages with the inner surfaces of the valve caps 174a, 174b. The flange 164 projects outwardly from the inlet body 156 and is configured to hold the inlet seal 160 on the inlet body 156.

[0168] The inlet check valves 150a, 150b are provided within the barrel 14. The inlet check valves 150a, 150b are configured to prevent backflow from flowing out of the barrel 14 and into the manifold 18. The inlet check valves 150a, 150b thus protect the manifold 18 from backflow, for example, if there is a cross of the component materials within the valve body 60, resulting in multi-component materials in the flow path within the barrel 14. The inlet check valves 150a, 150b prevent the multi-component materials from flowing into the manifold 18, which may solidify within the manifold 18, causing the manifold 18 to be inoperable.

[0169] The fastener 20 mounts the manifold 18 to the barrel 14. The fastener 20 extends through the manifold body 166 and into a fastener opening 154 formed in the valve body 60. In the illustrated example, the fastener 20 is formed as a threaded fastener that includes an external thread that mates with an internal thread formed within the valve body 60. The fastener 20 extends completely through the manifold body 166 and engages with the valve body 60.

[0170] After mounting the manifold 18 to the barrel 14, the manifold 18 can engage with the spray gun body 30 and the lower side 180 of the valve body 60. The fastener 20 extends into the valve body 60 at a location that is axially disposed between a first interface 182a between the manifold bracket 172 and the spray gun body 30 and a second interface 182b between the valve caps 174a, 174b and the lower side 180. The fastener applies a clamping force to secure the manifold 18 to the barrel 14. The clamping force is balanced between the two interfaces 182a, 182b, thereby providing a secure connection while maintaining the alignment between the barrel inlets 148a, 148b and the flow path through the manifold 18.

[0171] During the assembly of the injector 10, the barrel 14 is mounted to the actuator assembly 12 to form a static interface 126 and a dynamic interface 128, as discussed in more detail below. The manifold 18 is mounted to the barrel 14, where the barrel 14 is mounted on the actuator assembly 12. One of the manifold 18 and the barrel 14 is transferred relative to the other of the manifold 18 and the barrel 14 such that the barrel inlets 148a, 148b enter the manifold 18. The barrel inlets 148a, 148b enter the manifold 18 through the valve caps 174a, 174b, respectively. The distal end of the inlet body 156 contacts the manifold valves 168a, 168b and displaces the manifold valves 168a, 168b to an open state. In the illustrated example, the distal end of the inlet body 156 contacts the balls of the manifold valves 168a, 168b and biases the balls away from the valve seats of the manifold valves 168a, 168b. The inlet body 156 holds the manifold valves 168a, 168b in the respective open states. When the manifold 18 is mounted to the barrel 14, the manifold valves 168a, 168b remain open. The fastener 20 is inserted through the manifold 18 and connected to the valve body 60. The fastener 20 secures the manifold 18 to the barrel 14.

[0172] During the disassembly of the injector 10, the fastener 20 is disconnected from the valve body 60. Then the manifold 18 can be pulled out of the cartridge 14. The cartridge inlets 148a, 148b are withdrawn from the manifold 18, and the manifold valves 168a, 168b return to their respective closed states. When the manifold 18 is not installed on the injector 10, the manifold valves 168a, 168b prevent leakage from the manifold 18. When the manifold 18 is removed from the cartridge 14, the manifold valves 168a, 168b automatically return to the closed state to prevent the material within the manifold channels 170a, 170b (but downstream of the material valves 40a, 40b) from leaking out of the manifold 18, thereby making the assembly and disassembly of the injector 10 easier and cleaner. After removing the manifold 18 from the cartridge 14, the static interface 126 and the dynamic interface 128 can be disconnected, and the cartridge 14 can be removed from the actuator assembly 12.

[0173] Figure 5A is an isometric view of the cartridge 14 with the mixing assembly 16 mounted thereon. Figure 5B is an exploded view of the cartridge 14 and the mixing assembly 16. Figure 5C is an isometric view of the cartridge 14 with the mixing assembly 16 removed, revealing the mixing chamber cavity 68. Figures 5A - 5C will be discussed in conjunction with Figures 1A - 4B together. The valve body 60, outer body 62, valve assembly 64, mixing chamber cavity 68, cartridge inlets 148a, 148b, and fastener openings 154 of the cartridge 14 are shown in the figures. The valve members 88a, 88b and the coupler 90 of the valve assembly 64 are shown in the figures. The gas cap 36, mixing chamber 110, chamber seal 184, and locator 186 of the mixing assembly 16 are also shown in the figures.

[0174] The cartridge 14 is configured to be installed on and removable from the spray gun body 30 of the injector 10 as a single module. The valve body 60 is at least partially disposed within the outer body 62. The cartridge inlets 148a, 148b extend from the valve body 60 and are configured to extend into the manifold 18 to receive the respective component material flows from the manifold 18.

[0175] The valve assembly 64 is at least partially disposed within the valve body 60. The valve assembly 64 is removable from the valve body 60 for maintenance or replacement. For example, the valve assembly 64 can be pulled along the second axial direction AD2 to remove the valve members 88a, 88b from the valve bores 66a, 66b. The same or a new valve assembly 64 can be installed onto the valve body 60 by shifting the valve assembly 64 relative to the valve body 60 along the first axial direction AD1, thereby inserting the valve members 88a, 88b into the valve bores 66a, 66b. During operation of the injector 10, the valve assembly 64 is movable relative to the valve body 60. The valve members 88a, 88b are mounted to the coupler 90. The coupler 90 is configured to connect to the drive piston 46 at the dynamic interface 128. The coupler 90 transmits the axial driving force from the drive piston 46 to the valve members 88a, 88b to axially move the valve members 88a, 88b during operation.

[0176] The mixing assembly 16 can be mounted to the cartridge 14 and is also removable from the cartridge 14. The mixing assembly 16 can remain mounted to the cartridge 14 when the cartridge 14 is mounted to the spray gun body 30 and when the cartridge 14 is removed from the spray gun body 30. The mixing chamber ll0 is configured to be at least partially disposed within the mixing chamber cavity 68 during operation of the injector 10. The mixing chamber seal 184 is mounted to the mixing chamber 110 and is configured to engage the valve body 60 at a location within the mixing chamber cavity 68. The mixing chamber seal 184 engages the mixing chamber 110 and the valve body 60 to prevent leakage between the mixing chamber 110 and the valve body 60 (e.g., leakage of compressed gas or constituent materials).

[0177] The locator 186 extends from the mixing chamber 110. The locating groove 188 is formed in the valve body 60 and extends axially and radially. The locator 186 is configured to be disposed within the locating groove 188 to ensure alignment of the chamber bores 140a, 140b of the mixing chamber 110 with the feed channels 134a, 134b when the mixing chamber 110 is mounted to the cartridge 14. The locator 186 disposed within the locating groove 188 can limit the axial displacement of the mixing chamber 110 when the mixing chamber 110 is mounted to the cartridge 14 or removed from the cartridge 14.

[0178] The air cap 36 can be mounted to the mixing chamber 110. The air cap 36 is configured to direct compressed air and output compressed air around the spray orifice 28 of the mixing chamber 110. Such compressed air can be referred to as cleaning air, which prevents the material from being blown out of the mixing chamber 110. The air cap 36 can be rotated relative to the mixing chamber 110 to mount the air cap 36 to the cartridge 14. In the illustrated example, the cap chamber 190 is formed in the first body end 94 of the valve body 60. The cap chamber 190 extends along the first axial direction AD1 relative to the mixing chamber cavity 68. The cap chamber 190 includes internal threads that are configured to engage the external threads on the air cap 36 to mount the air cap 36 to the cartridge 14.

[0179] Figure 6A is along Figure 5A the cross-sectional view of line AA in Figure 6B is along Figure 5A the cross-sectional view of line BB in Figure 6C is along Figure 5A the cross-sectional view of line CC in Figures 6A to 6C will be discussed together and continue to refer to Figures 1A to 5C . Figures 6A to 6C shows the gas passage through the cartridge 14. The cartridge 14 and the mixing assembly 16 are shown in the figure. The valve body 60, the outer body 62, the valve assembly 64, the valve holes 66a, 66b, the mixing chamber cavity 68, the gas chambers 72a, 72b, the gas passages 74a, 74b, the gas check valves 80a, 80b and the gas rod 82 of the cartridge 14 are shown in the figure. The gas cap 36 and the mixing chamber 110 of the mixing assembly 16 are also shown in the figure.

[0180] In the illustration, the cartridge 14 has been removed from the actuator assembly 12 and the mixing assembly 16 has been installed on the cartridge 14. The cartridge 14 is configured to provide a flow of component materials to the mixing assembly 16 for mixing within the mixing chamber 110 to form a multi-component material that is ejected in a spray form. The cartridge 14 is also configured to provide a flow of compressed gas to the mixing assembly 16, and the compressed gas flows through the mixing chamber 110 to purge the residual materials in the mixing chamber 110 and flows to the gas cap 36 to be ejected around the ejection orifice 28. In the illustrated example, the cartridge 14 is configured to direct discrete flows of compressed gas to the mixing assembly 16. However, it should be understood that not all examples are limited in this way. For example, the cartridge 14 may include a single gas passage that branches within the valve body 60 to supply compressed gas to both gas chambers 72a, 72b simultaneously.

[0181] Maintaining the air flow within the cartridge 14 in a separate air flow can provide significant advantages. For example, some examples of the ejector 10 may be configured to intermittently supply solvent to the mixing chamber 110 during the entire operation. When the ejector 10 is in the non-ejecting mode, the solvent helps to purge the residues in the mixing chamber 110, and this non-ejecting state may also be referred to as the purge state because purge air will flow into and through the mixing chamber 110. The solvent can slow down the reaction process of the multi-component material, thereby inhibiting curing within the mixing chamber 110 and dissolving the uncured multi-component material.

[0182] In the illustrated example, the gas passage 74b is configured to direct compressed gas containing a metered amount of solvent to the mixing chamber 110. Providing the solvent only through the gas passage 74b prevents the solvent from mixing with the component A material provided at a location upstream of the mixing chamber 110 through the valve orifice 66a. For example, the valve orifice 66b may be configured to provide a resin component material to the mixing chamber 110, while the valve orifice 66a may be configured to provide an isocyanate component material. Isocyanates are moisture sensitive and cure upon contact with a liquid (e.g., solvent). The cured isocyanate forms crystals that can scratch or otherwise damage the soft seal and clog the passageways of the cartridge 14. Having the solvent flow into the mixing chamber 110 through the same port as the resin (e.g., through the feed passage 134b) prevents the solvent and isocyanate from mixing within the cartridge 14 at a location upstream of the mixing chamber 110. In the illustrated example, the metering piston 48 is configured to meter the solvent into the compressed gas stream provided to the gas passage 74b.

[0183] The gas passage 74b extends through the valve body 60 and is located between the gas inlet 192b and the gas chamber 72b. At least a portion of the gas passage 74b is coaxially disposed on the injection axis SA with the mixing chamber cavity 68. The gas inlet 192b is formed through the chamber wall 87 and leads to the valve body cavity 86 when the gas valve stem 82 is not installed onto the valve body 60. In the illustrated example, the gas passage 74b includes a first gas path 194b that extends axially along a first axial direction AD1 and extends radially outward relative to the injection axis SA within the valve body 60. A second gas path 196b intersects the first gas path 194b at a location radially offset from the injection axis SA and the valve axis VA of the valve orifice 66b. The second gas path 196b extends radially to the valve axis VA of the valve orifice 66b and intersects the gas chamber 72b at a location spaced from the feed passage 134b in the first axial direction AD1. The gas passage 74b does not open through the first body end 94 of the valve body 60. In the illustrated example, the gas passage 74b does not completely extend through the valve body 60.

[0184] In the illustrated example, the gas stem 82 is connected to the valve body 60 at the gas inlet 192b. The gas stem 82 extends axially along a second axial direction AD2. The gas stem 82 extends through the orifice 198 in the coupler 90. The gas stem 82 is configured to extend into and engage the drive piston 46 during operation of the injector 10. In the illustrated example, the gas stem 82 is mounted to the valve body 60 such that the gas stem 82 remains stationary during operation while the drive piston 46 moves along the injection axis SA to move the valve assembly 64. The gas stem 82 is fully extended out of the orifice 198 whether the injector 10 is in the injecting state or the non-injecting state. The gas stem 82 extends completely through the valve body cavity 86 and extends beyond the second body end 96 of the valve body 60. A portion of the gas passage 74b is located upstream of the gas check valve 80b and is formed in the gas stem 82.

[0185] The valve stem seal 200 is installed on the gas rod 82. The valve stem seal 200 is configured to engage with the inner surface of the drive piston 46 to prevent compressed gas from leaking out of the exterior of the gas rod 82. Although the gas rod 82 shown in the figure is installed on the valve body 60, it should be understood that this is not the case for all examples. For example, the gas rod 82 can be installed on the drive piston 46 so as to move with the drive piston 46, and can extend into the valve body 60 and be sealed with the valve body 60. In this example, the valve stem seal 200 can be installed to engage with the valve body 60 and slide relative to the valve body 60 as the gas rod 82 moves with the drive piston 46. In both of these examples, the gas rod 82 bridges the axial gap between the valve body 60 and the drive piston 46 along the injection axis SA. The gas rod 82 provides a conduit for transmitting compressed gas from the drive piston 46 to the valve body 60 while keeping the flow of this compressed gas separated from the flow of compressed gas transmitted through the gas passage 74a.

[0186] The gas check valve 80b is configured to prevent gas from flowing backward through the gas passage 74b. In the example shown, the gas check valve 80b is disposed within the valve body 60. In the example shown, the gas check valve 80b is coaxially disposed with the injection axis SA. In the example shown, the gas check valve 80b is a spring ball valve, but it should be understood that the gas check valve 80b can be of any desired configuration suitable for allowing one-way flow through the gas passage 74b. In the example shown, the gas valve stem 82 forms the valve seat of the ball valve of the gas check valve 80b. Although the gas check valve 80b shown in the figure is disposed within the valve body 60, it should be understood that not all examples are limited to this. For example, the gas check valve 80 can be disposed within the drive piston 46, such as in the example where the gas valve stem 82 is installed on the drive piston 46 and moves with the drive piston 46.

[0187] The gas passage 74a extends through the valve body 60. The gas passage 74a is used to output compressed gas to the gas chamber 72a and the gas cap 36. The gas passage 74a is used to receive compressed gas through the gas inlet 192a. The gas inlet 192a is formed to pass through the chamber wall 87. The gas inlet 192a leads to the valve body cavity 86 and is used to receive compressed gas from the valve body cavity 86. In some examples, the valve body cavity 86 is pressurized by compressed gas throughout the operation of the injector 10. The valve body cavity 86 is in fluid communication with a passage passing through the spray gun body 30, and this passage outputs compressed gas from the spray gun body 30 to the cartridge 14.

[0188] The gas passage 74a is radially offset from the injection axis SA. The gas passage 74a is configured to supply compressed gas to the gas chamber 72a and the gas cap 36 so that gas is ejected around the injection orifice 28. The gas passage 74a is open in both the axial directions AD1 and AD2 through the valve body 60.

[0189] In the illustrated example, the gas passage 74a includes a first gas path 194a that extends axially within the valve body 60 along a first axial direction AD1. The first gas path 194a extends to a gas outlet 202 that is formed through a first body end 94 of the valve body 60. Compressed gas is output from the gas outlet 202 to the gas cap 36. The compressed gas is output to the gas cap 36 at a position radially outward of the cap chamber 190. The gas cap 36 outputs the compressed gas around the injection orifice 28. Regardless of the operating state of the injector 10, the gas passage 74a can continuously output compressed gas from the gas outlet 202 to the gas cap 36. Thus, throughout the operation, regardless of whether the injector 10 is in an injection state or a non-injection state, and when the injector 10 is transitioning between states, the gas cap 36 can output to around the injection orifice 28

[0190] A second gas path 196a intersects the first gas path 194a at a position radially offset from the injection axis SA and the valve axis VA of the valve bore 66a. The second gas path 196a extends radially to the valve axis VA of the valve bore 66a and intersects the gas chamber 72a at a position spaced along the first axial direction AD1 from the feed passage 134a. The second gas path 196a intersects the first gas path 194a at a position spaced from the gas outlet 202 along a second axial direction AD2. When the injector 10 is in a non-injection state, compressed gas from the gas chamber 72a can flow through the feed passage 134a to the mixing chamber 110

[0191] The gas check valve 80a is configured to prevent reverse flow of gas through the gas passage 74a. In the illustrated example, the gas check valve 80a is disposed within the valve body 60. The position of the gas check valve 80a is radially offset from the injection axis SA and each valve axis VA. In the illustrated example, the gas check valve 80a is a spring ball valve, but it will be understood that the gas check valve 80a can be of any configuration suitable for allowing one-way flow of gas through the gas passage 74a. A valve seat 204 is mounted on the valve body 60 and forms the valve seat of the gas check valve 80a. For example, the valve seat 204 can be mounted on the valve body 60 by means of an interface thread or the like. The gas check valve 80a is mounted within the valve body 60, near the gas inlet 192a

[0192] Although the cartridge 14 has been described as including two different gas passages 74a, 74b within the valve body 60 for routing compressed gas and not crossing each other, it should be understood that not all examples are so limited. For example, some configurations of the cartridge 14 can include a single gas passage within the valve body 60 that branches within the valve body 60 to two valve bores 66a, 66b

[0193] As shown, the coupler 90 is disposed at least partially within the body cavity 86, but spaced apart from the wall of the protrusion 130 that defines the body cavity 86. The gap between the coupler 90 and the body cavity 86 allows compressed gas to flow into the body cavity 86 to pressurize the body cavity 86. Pressurizing the body cavity 86 does not move the coupler 90, but instead supplies compressed gas to the gas passage within the valve body 60. Compressed gas can flow through the gap between the coupler 90 and the body cavity 86. The body cavity 86 does not form a drive cavity that causes the valve assembly 64 to move upon pressurization. Instead, the valve assembly 64 receives a mechanical input through the dynamic interface 128 to actuate the flow valves 58a, 58b between different states.

[0194] The cartridge 14 has significant advantages. The compressed gas supplied to the gas chambers 72a and 72b is fluidly separated within the cartridge 14 until it converges after entering the mixing chamber 110. The fluidly separated gas passages 74a, 74b facilitate the flow of the solvent along a path that does not contain moisture-reactive component materials to the mixing chamber 110. Maintaining the fluid separation of the gas passages 74a, 74b prevents such moisture-sensitive materials from curing at locations upstream of the mixing chamber 110, thereby protecting the seal interface. The gas passage 74a is a gas passage that does not receive or transmit the solvent and supplies compressed gas to the gas cap 36 for cleaning the mixing chamber 110. The gas passage 74a provides dry air free of solvent, thereby preventing overuse of the solvent and reducing material costs.

[0195] Figure 7A is a cross-sectional view taken along Figure 5A centerline 7-7, showing the valve assembly 64 in a position associated with the flow valves 58a, 58b being in a first open state, respectively. Figure 7B is a cross-sectional view taken along Figure 5A centerline 7-7, showing the valve assembly 64 in a position associated with the flow valves 58a, 58b being in a closed state, respectively. Figure 7C is a cross-sectional view taken along Figure 5A centerline 7-7, showing the valve assembly 64 in a position associated with the flow valves 58a, 58b being in a second open state, respectively. Figures 7A to 7C will be discussed together and continue to refer to Figures 1A to 6C .

[0196] The figure shows flow valves 58a, 58b; valve body 60; outer body 62; valve assembly 64; valve bores 66a, 66b; mixing chamber cavity 68; flow chambers 70a, 70b; gas chambers 72a, 72b; gas passage 74b; seal bodies 76a, 76b; retainers 78a, 78b; gas check valve 80b; gas rod 82; body mount 84; and projection 130 of cartridge 14. Valve assembly 64 includes valve members 88a, 88b; coupler 90; and valve mount 92. Each valve member 88a, 88b includes a flow head 98, a flow neck 100, a member body 102, a mounting neck 104, a mounting head 106, and a tail 108. Each seal body 76a, 76b includes a material control body 206, a gas control body 208, and a body gasket 210. Mixing assembly 16 includes a gas cap 36 and a mixing chamber 110.

[0197] Cartridge 14 is configured to be mounted to and removed from spray gun body 30 as a single unit to facilitate quick replacement of the valve that controls the flow of the component material (in some examples, the compressed gas flow to mixing chamber 110). Projection 130 is formed at the second body end 96 of valve body 60. Body mount 84 is formed on projection 130 and is configured to engage a portion of spray gun body 30 to form a static interface between cartridge 14 and spray gun body 30.

[0198] Valve body 60 defines a flow path for the component material and the compressed gas. Valve body 60 extends between a first body end 94 and a second body end 96. Cartridge 14 is configured such that the first body end 94 is the spray output end of valve body 60, and the spray (e.g., multi-component material, compressed gas) exits cartridge 14 from the spray output end. Cartridge 14 is configured such that the connection to actuator assembly 12 (e.g., the actuation connection at dynamic interface 128 and the support connection at static interface 126) is formed at the second body end 96. In the illustrated example, valve body 60 does not receive the component material through the second body end 96. In the illustrated example, valve body 60 receives the compressed gas at the second body end 96. Valve body 60 is configured such that the multi-component material and the compressed gas are output through the first body end 94.

[0199] Mixing chamber cavity 68 is formed within valve body 60. Mixing chamber cavity 68 extends from the first body end 94 into valve body 60 and opens through the first body end 94 in a first axial direction AD1. Mixing chamber cavity 68 does not extend completely axially through valve body 60 and does not open through the second body end 96. Mixing chamber cavity 68 does not open through chamber wall 87. Mixing chamber cavity 68 does not extend to chamber wall 87. Mixing chamber 110 does not pass through two axially aligned openings. Instead, mixing chamber 110 can only move through the opening of mixing chamber cavity 68 oriented in the first axial direction AD1, and this movement occurs during the installation and removal of mixing chamber 110, rather than during the spraying operation.

[0200] The cap chamber 190 extends from the mixing chamber cavity 68 along a first axial direction AD1. The cap chamber 190 is coaxially disposed on the injection axis SA with the mixing chamber cavity 68. The diameter of the cap chamber 190 is greater than the diameter of the mixing chamber cavity 68. The cap chamber 190 opens through the first body end 94 of the valve body 60. In the illustrated example, the cap chamber 190 includes threads configured to engage threads on the gas cap 36 to mount the gas cap 36 to the valve body 60.

[0201] The mixing assembly 16 is mountable to and supported by the barrel 14. In the illustrated example, the mixing assembly 16 is mounted to the valve body 60. In the illustrated example, the mixing assembly 16 is mounted to the first body end 94 of the valve body 60. The gas cap 36 extends at least partially into the valve body 60 and radially overlaps a portion of the valve body 60 when the mixing assembly 16 is mounted to the barrel 14. In the illustrated example, the gas cap 36 is mounted to the barrel 14 by interface threads formed on the gas cap 36 and the valve body 60. The threads on the valve body 60 are formed in the cap chamber 190. The cap chamber 190 extends along the first axial direction AD1 relative to the mixing chamber cavity 68. The diameter of the cap chamber 190 is greater than that of the mixing chamber cavity 68. In the illustrated example, the threads on the valve body 60 that engage the gas cap 36 are formed as internal threads. Although the gas cap 36 is described as being mounted to the barrel 14 by interface threads, it should be understood that other types of connections are possible, such as, for example, bayonet connections, among other options.

[0202] The injection orifice 28 is formed at the downstream end of the mixing chamber 110. In the illustrated example, the injection orifice 28 is formed by the mixing chamber 110. In the illustrated example, the mixing chamber 110 is configured as a static mixing chamber 110, i.e., the mixing chamber 110 does not translate along the injection axis SA such that the injector 10 cannot be actuated between an injection state and a non-injection state. The mixing chamber 110 is configured to remain stationary when the flow valves 58a, 58b are actuated between different states to open and close the flow of the component materials to the mixing chamber 110.

[0203] The valve bores 66a, 66b extend into the valve body 60. In the illustrated example, the valve bores 66a, 66b only partially axially penetrate the valve body 60. The valve bores 66a, 66b open along the second axial direction AD2 and are closed along the first axial direction AD1. The valve bores 66a, 66b open along the second axial direction AD2 to allow the valve members 88a, 88b to enter the valve bores 66a, 66b. The valve bores 66a, 66b are closed along the first axial direction AD1 such that the valve members 88a, 88b cannot fully axially penetrate the valve bores 66a, 66b. By pulling the valve assembly 64 along the second axial direction AD2, the valve assembly 64 can be removed from the valve body 60. By aligning the valve members 88a, 88b with the valve bores 66a, 66b respectively and moving the valve assembly 64 along the first axial direction AD1 to cause the valve members 88a, 88b to enter the valve bores 66a, 66b, a new or identical valve assembly 64 can be installed on the cartridge 14.

[0204] Each of the valve bores 66a, 66b extends along a valve axis VA. In the illustrated example, the valve axis VA is parallel and radially offset from the injection axis SA. In some examples, a plane may be provided in the cartridge 14 along which the injection axis SA and the two valve axes VA extend. The valve bores 66a, 66b define flow paths for the component material and the compressed gas to flow to the mixing chamber 110.

[0205] The valve bores 66a, 66b pass through the chamber wall 87 of the valve body 60. The chamber wall 87 forms the downstream end of the main body cavity 86. The protrusion 130 extends from the chamber wall 87 along the second axial direction AD2. The protrusion 130 extends from the block 61 of the valve body 60 along the second axial direction AD2. The main body cavity 86 opens along the second axial direction AD2 through the second main end 96 and is at least partially defined by the chamber wall 87 and the protrusion 130. The chamber wall 87 is spaced apart from the distal end of the protrusion 130 along the first axial direction AD1. The chamber wall 87 is spaced apart from the main body mount 84 along the first axial direction AD1. In the illustrated example, each of the gas channels 74a, 74b and the valve bores 66a, 66b opens through the chamber wall 87.

[0206] The block 61 of the valve body 60 defines various flow channels passing through the cartridge 14. In the illustrated example, the valve bores 66a, 66b and the mixing chamber cavity 68 are both formed within the block 61. The valve bores 66a, 66b extend into the block 61 along the first axial direction AD1, and the mixing chamber cavity 68 extends into the block 61 along the second axial direction AD2. The gas channels 74a, 74b are formed to pass through the block 61. The protrusion 130 extends from the block 61 to the second main end 96. In the illustrated example, the chamber wall 87 forms one end of the block 61 along the second axial direction AD2.

[0207] The valve bores 66a, 66b respectively include flow chambers 70a, 70b. The flow chambers 70a, 70b are fluidly connected to the manifold 18 for receiving ingredient materials from the manifold 18. The flow valves 58a, 58b control the flow of the ingredient materials from the flow chambers 70a, 70b to the mixing chamber 110. In the illustrated example, the valve bores 66a, 66b respectively include air chambers 72a, 72b. The air chambers 72a, 72b are fluidly connected to a compressed air stream supplied to the injector 10. The flow valves 58a, 58b control the flow of the compressed gas from the air chambers 72a, 72b to the mixing chamber 110. The air chambers 72a, 72b are arranged to radially overlap with the mixing chamber 110, where the mixing chamber 110 is mounted to the cartridge 14. The air chambers 72a, 72b radially overlap with the mixing chamber cavity 68.

[0208] The flow chamber 70a is coaxially disposed on the valve axis VA of the valve bore 66a with the air chamber 72a. The flow chamber 70b is coaxially disposed on the valve axis VA of the valve bore 66b with the air chamber 72b.

[0209] Within each of the valve bores 66a, 66b, the flow chambers 70a, 70b and the air chambers 72a, 72b of the valve bores 66a, 66b are fluidly isolated from each other by respective valve members 88a, 88b. The valve members 88a, 88b are actuatable to fluidly connect the air chambers 72a, 72b to the mixing chamber 110 when the injector 10 is in a non-injecting state and to fluidly connect the flow chambers 70a, 70b to the mixing chamber 110 when the injector 10 is in an injecting state.

[0210] The feed channels 134a, 134b respectively extend between the valve bores 66a, 66b and fluidly connect the valve bores to the mixing chamber cavity 68. The ingredient materials and the compressed gas flow through the feed channels 134a, 134b and flow into the mixing chamber 110 to enter the mixing chamber 110. In the illustrated example, the feed channels 134a, 134b are aligned with each other such that a radial line extending from the injection axis SA can extend through each of the feed channels 134a, 134b along the entire length of the feed channels 134a, 134b without intersecting the walls defining either of the feed channels 134a, 134b.

[0211] The air rod 82 extends between the cartridge 14 and the gun body 30 and is fluidly connected thereto. The air rod 82 is configured to route compressed gas to the gas channel 74b in the illustrated example. The air rod 82 extends through an orifice 198 formed in the coupler 90. The valve assembly 64 can move relative to the air rod 82 when the flow valves 58a, 58b are actuated between different states. A body cavity 86 is formed within the valve body 60. The body cavity 86 opens in a second axial direction AD2. Both of the valve bores 66a, 66b lead to the body cavity 86. The coupler 90 of the valve assembly 64 is at least partially disposed within the body cavity 86 and can reciprocate within the body cavity 86 during operation of the injector 10.

[0212] Sealing bodies 76a and 76b are respectively disposed within valve holes 66a and 66b. Each of the sealing bodies 76a and 76b is installed within the corresponding valve hole 66a and 66b. The sealing bodies 76a and 76b are configured to engage with valve members 88a and 88b respectively to open and close the flow paths for compressed gas and component material flowing into the mixing chamber 110. In the illustrated example, each of the sealing bodies 76a and 76b is formed by a plurality of components installed within the valve holes 66a and 66b. However, it should be understood that not all examples are limited thereto. For example, the sealing bodies 76a and 76b may be integrally formed, and there are other options in addition.

[0213] In the illustrated example, each of the sealing bodies 76a and 76b includes a gas control body 208 installed within the valve holes 66a and 66b. The gas control body 208 at least partially defines gas chambers 72a and 72b. The gas control body 208 is configured to engage with the flow heads 98 of the valve members 88a and 88b when the flow valves 58a and 58b are in the second open state to seal the gas chambers 72a and 72b and prevent compressed gas from flowing into the mixing chamber 110. The gas control body 208 can be regarded as forming the gas seats of the flow valves 58a and 58b. It should be understood that the gas control body 208 can be configured to directly engage with the flow head 98 to seal the gas chambers 72a and 72b, or the gas control body 208 can support a sealing element (e.g., an O-ring) that directly engages with the flow head 98 to seal the gas chambers 72a and 72b.

[0214] A body seal 214a is disposed around the gas control body 208 and engages with the gas control body 208 and the valve body 60. The body seal 214a prevents compressed gas from leaking from the outside of the gas control body 208.

[0215] Each of the sealing bodies 76a and 76b further includes a material control body 206 installed within the valve holes 66a and 66b. The material control body 206 at least partially defines flow chambers 70a and 70b. The material control body 206 is configured to engage with the flow heads 98 of the valve members 88a and 88b when the flow valves 58a and 58b are in the first open state to seal the flow chambers 70a and 70b and prevent component material from flowing into the mixing chamber 110. The material control body 206 can be regarded as forming the material seats of the flow valves 58a and 58b. It should be understood that the material control body 206 can be configured to directly engage with the flow head 98 to seal the flow chambers 70a and 70b, or the material control body 206 can support a sealing element (e.g., an O-ring) that directly engages with the flow head 98 to seal the flow chambers 70a and 70b.

[0216] The body seal 214b is disposed around the material control body 206 and engages with the material control body 206 and the valve body 60. The body seal 214b prevents the component material from leaking outside the gas control body 208. In the illustrated example, a pair of body seals 214b are installed on the upstream side and the downstream side of each material control body 206. The body seal 214b is disposed on the opposite axial sides of the hole inlets 152a, 152b that supply the component material to the valve holes 66a, 66b.

[0217] The valve body gasket 210 is axially disposed between the gas control body 208 and the material control body 206. The valve body gasket 210 can engage with each of the gas control body 208 and the material control body 206. The valve body gasket 210 is provided with an outlet that is aligned with the feed channels 134a, 134b to facilitate the flow of fluid from inside the seal bodies 76a, 76b to the feed channels 134a, 134b and then to the mixing chamber cavity 68. The outlet passing through the valve body gasket 210 forms the outlet of the seal bodies 76a, 76b. The valve body fastener 212 passes through the valve body 60 and engages with the valve body gasket 210. The valve body fastener 212 fixes the valve body gasket 210 relative to the valve body 60 and maintains the alignment between the outlet and the feed channels 134a, 134b. In the illustrated example, the valve body fastener 212 is fixed to the valve body 60 and includes a column that extends through the valve body 60 and engages with the valve body gasket 210. For example, the valve body fastener 212 can be connected to the valve body 60 by connection means such as interface threads. In the illustrated example, the outer body 62 extends and covers the valve body fastener 212.

[0218] Seal bodies 76a, 76b form valve seats for flow valves 58a, 58b. Movable components (e.g., valve members 88a, 88b) of flow valves 58a, 58b are movable relative to seal bodies 76a, 76b to open and close the flow paths flowing through flow valves 58a, 58b. In the illustrated example, gas control body 208 forms a gas seat with which valve members 88a, 88b cooperate to cut off the gas flowing to mixing chamber cavity 68. In the illustrated example, material control body 206 forms a material seat with which valve members 88a, 88b cooperate to cut off the component materials flowing to mixing chamber cavity 68. In the illustrated example, valve members 88a, 88b maintain a sealed engagement with seal bodies 76a, 76b throughout the operation, and flow valves 58a, 58b are respectively in a first open state, a second open state, and a closed state. In the first open state, valve members 88a, 88b are disengaged from gas control body 208 and are in sealed engagement with material control body 206. In the second open state, valve members 88a, 88b are disengaged from material control body 206 and are in sealed engagement with gas control body 208. In the closed state, valve members 88a, 88b are in sealed engagement with gas control body 208 and material control body 206. It can be understood that valve members 88a, 88b are considered to achieve a sealed engagement when directly engaged with seal bodies 76a, 76b or when engaged with a separate seal (e.g., O-ring) supported by flow head 98 or seal bodies 76a, 76b.

[0219] Retainers 78a, 78b are mounted to valve body 60. Retainers 78a, 78b are respectively mounted on valve holes 66a, 66b. For example, each of retainers 78a, 78b can be mounted to valve body 60 by means of a threaded interface or the like. Retainers 78a, 78b are respectively used to fix seal bodies 76a and 76b within valve holes 66a, 66b. Shaft seal 136 is supported by retainers 78a, 78b. Shaft seal 136 is configured to engage with the outer surfaces of valve members 88a, 88b to seal with the outer surfaces of valve members 88a, 88b.

[0220] The valve assembly 64 is used to control the flow of the component material and the compressed gas to the mixing chamber 110. The valve assembly 64 is formed by valve members 88a, 88b mounted on the connector 90. In the illustrated example, each of the valve members 88a, 88b is formed as a shuttle that can move axially along the valve axis VA. Each of the valve members 88a, 88b is elongated along its respective valve axis VA. The valve members 88a, 88b can slide along their respective valve axes VA and slide relative to the seal bodies 76a, 76b, so that the flow valves 58a, 58b are in various operating states. The valve members 88a, 88b form the moving valve members of the flow valves 58a, 58b. The movement of the valve member 88a (e.g., parallel to the injection axis SA) can open and close the flow valve 58a. The movement of the valve member 88b (e.g., parallel to the injection axis SA) opens and closes the flow valve 58b.

[0221] Each of the valve members 88a, 88b extends into the valve holes 66a, 66b, but does not pass through the valve holes. The valve members 88a, 88b are respectively at least partially disposed within the valve holes 66a, 66b. In the illustrated example, the valve members 88a, 88b project from the valve holes 66a, 66b in the second axial direction AD2. The valve members 88a, 88b extend into the body cavity 86. The valve members 88a, 88b extend to and through the connector 90 for mounting to the connector 90. In the illustrated example, during at least some operating phases of the cartridge 14, the valve members 88a, 88b project beyond the second body end 96. In the illustrated example, at least when the flow valves 58a, 58b are in their respective first open states, the valve members 88a, 88b project axially outward beyond the second body end 96.

[0222] The valve members 88a, 88b are connected to the connector 90 for simultaneous actuation along the valve axis VA. The connector 90 is coaxially disposed on the injection axis SA with the mixing chamber 110. The valve members 88a, 88b are connected to the connector 90 at positions radially offset from the injection axis SA. The connector 90 is configured to receive a drive input (axial AD1 or AD2) along the injection axis SA and transmit the drive input radially outward to the valve members 88a, 88b and displace the valve members 88a, 88b axially along their respective valve axes VA. The valve members 88a, 88b are fixed to the connector 90 for simultaneous actuation such that the flow valves 58a, 58b are simultaneously actuated between different states and are in the same respective states. For example, the flow valves 58a, 58b will simultaneously be in the first open state, the second open state, or the closed state.

[0223] The cartridge 14 has significant advantages. The cartridge 14 can be mounted as a single module onto the actuator assembly 12 of the injector 10 and can also be removed therefrom. The cartridge 14 includes the static components of the flow valves 58a, 58b and the movable valve components of the flow valves 58a, 58b. The static components (e.g., the seal bodies 76a, 76b) and the movable valve components (e.g., the valve members 88a, 88b) are configured to be mounted onto and removed from the actuator assembly 12 as part of the cartridge 14. The cartridge 14 itself does not contain a drive assembly that provides mechanical force to actuate the flow valves 58a, 58b. The cartridge 14 does not contain any driver similar to the drive piston 46. Instead, mechanical force is input into the cartridge 14 through the coupler 90 and transmitted to the valve members 88a, 88b. The cartridge 14 does not support the trigger 24. The cartridge 14 does not contain a valve that reroutes compressed gas to different flow paths like the gas valve 44; instead, the flow valves 58a, 58b can open and close the flow of compressed gas to the mixing chamber cavity 68. The ingredient material and the compressed gas flow through the cartridge 14 in a single direction, i.e., towards the mixing chamber cavity 68. The valve body 60 opens in the second axial direction AD2 to facilitate mounting the cartridge 14 onto the actuator assembly 12 at the static interface 126 and the dynamic interface 128.

[0224] The cartridge 14 can be mounted and removed as a single unit, which enables the part of the injector 10 that controls the flow of the ingredient material and where the ingredient materials are mixed to form a multi-component material to be disassembled and removed. The cartridge 14 can be removed from the actuator assembly 12 that guides the flow of the compressed gas and the manifold 18 that guides the flow of the ingredient material. The cartridge 14 isolates any potential cross-flow inside the cartridge 14, preventing contamination caused by the cross-flow. The cartridge 14 also includes various check valves (e.g., the inlet check valves 150a, 150b ( Figure 4B )) and the gas check valves 80a ( Figure 6B ), 80b) that prevent backflow. Such valves can isolate any potential cross-flow inside the cartridge 14. If such improper curing occurs in the cartridge 14, the cartridge 14 can be removed and replaced with a new one, thereby reducing downtime and saving costs. The user can use the same manifold 18 and actuator assembly 12 and only need to replace the cartridge 14.

[0225] Figure 8A is an isometric view of the cartridge 14 as seen from the rear side of the cartridge 14. Figure 8B is an enlarged isometric view of the cartridge 14 as seen from the rear side of the cartridge 14, with the gas rod 82 removed for clarity. Figure 8C is a partially enlarged isometric view of the actuator assembly 12. Figures 8A - 8C will be discussed in conjunction with Figures 1A - 7C

[0226] ​The figure shows the actuator assembly 12 and the cartridge 14 of the injector 10. The figure shows the spray gun body 30 and the drive piston 46 of the actuator assembly 12. The figure shows the housing 32, the housing mount 56, the receiver 132, and the body slot 178 of the spray gun body 30. The figure shows the valve body 60, the outer body 62, the valve assembly 64, the cartridge inlets 148a, 148b, the body mount 84, and the protrusion 130 of the cartridge 14. The figure shows the valve members 88a, 88b, the coupler 90, and the valve mount 92 of the valve assembly 64.

[0227] The cartridge 14 can be mounted onto the actuator assembly 12 as a single unit or removed from the actuator assembly 12. The cartridge 14 is configured to be mounted onto the actuator assembly 12 through a static interface 126 (as shown in Figure 2A and 2B ) and a dynamic interface 128 (as shown in Figure 2A and 2B ). The static interface 126 remains fixed when connected and supports the moving parts. The static interface 126 fixes the valve body 60 to the spray gun body 30, such that the cartridge 14 is supported by the spray gun body 30. The dynamic interface 128 allows for the transfer of mechanical motion between the actuator assembly 12 and the cartridge 14, for example, opening and closing the flow valves 58a, 58b. The static interface 126 and the dynamic interface 128 can form connections and disconnections for connecting the cartridge 14 to the actuator assembly 12 and removing the cartridge 14 from the actuator assembly 12. The static interface 126 and the dynamic interface 128 can be formed simultaneously when mounting the cartridge 14 and can be disconnected simultaneously when removing the cartridge 14. In the example shown, the static interface 126 and the dynamic interface 128 are coaxially arranged on the injection axis SA, and the cartridge 14 is mounted onto the actuator assembly 12.

[0228] The static interface 126 is formed by the engagement of the protrusion 130 of the valve body 60 with the receiver of the spray gun body 30. In the example shown, the protrusion 130 includes the body mount 84 of the valve body 60 and is part of the cartridge 14. The protrusion 130 can be formed as a cylindrical protrusion, among other alternatives. In the example shown, the receiver 132 is formed by the housing mount 56 and is part of the spray gun body 30. However, it can be understood that in alternative examples, the protrusion 130 of the cartridge 14 can be configured to receive the receiver 132 of the spray gun body 30, such that the cartridge 14 can be considered to contain the receiver, while the spray gun body 30 can be considered to contain the protrusion. In such examples, a part of the spray gun body 30 can extend into the protrusion 130 of the cartridge 14, and thus be at least partially disposed within the valve body 60.

[0229] The body mount 84 is formed by a series of barrel protrusions 216 that project radially outward from the valve body 60. The barrel protrusions 216 are arranged about the injection axis SA. In the illustrated example, the barrel protrusions 216 are evenly arranged about the injection axis SA. The barrel protrusions 216 include alignment barrel protrusions 216a and mounting barrel protrusions 216b. The circumferential width CW1 of the alignment barrel protrusions 216a is different from the circumferential width CW2 of the mounting barrel protrusions 216b. In the illustrated example, the circumferential width CW1 of the alignment barrel protrusions 216a is less than the circumferential width CW2 of the mounting barrel protrusions 216b. The circumferential width is taken between the circumferential edges of the barrel protrusion 216 and the radially outer surface of the barrel protrusion 216. The different circumferential widths of the alignment barrel protrusions 216a and the mounting barrel protrusions 216b provide a keyed interface between the body mount 84 and the housing mount 56, thereby allowing the cartridge 14 to be installed in a single direction relative to the spray gun body 30 (as shown in the illustrated example). The barrel protrusions 216 are formed at the second body end 96 of the valve body 60 in the illustrated example.

[0230] The housing mount 56 is configured to engage with the body mount 84 to form a static interface 126. In the illustrated example, the housing mount 56 is formed by a series of body notches 218 and body protrusions 220 that extend about the injection axis SA. The body notches 218 extend radially outward such that the body protrusions 220 are formed between circumferentially adjacent body notches 218. Each body protrusion 220 only extends partially about the injection axis SA. Each body notch 218 only extends partially about the injection axis SA. The body notches 218 include alignment body notches 218a and mounting body notches 218b. The circumferential width CW3 of the alignment body notches 218a is different from the circumferential width CW4 of the mounting body notches 218b. In the illustrated example, the circumferential width CW3 of the alignment body notches 218a is less than the circumferential width CW4 of the mounting body notches 218b. The circumferential width is taken between the circumferential edges of the body notch 218 and the radially outer surface of the body notch 218. The different circumferential widths of the alignment body notches 218a and the mounting body notches 218b form a keyed interface between the body mount 84 and the housing mount 56, thereby allowing the cartridge 14 to be installed in a single direction relative to the spray gun body 30 (in the illustrated example). In the illustrated example, the body notches 218 and the body protrusions 220 are formed at the distal end of the spray gun body 30 along the first axial direction AD1.

[0231] Although the width of the alignment cartridge protrusion 216a is described as being narrower than the width of the mounting cartridge protrusion 216b, it should be understood that not all examples are so limited. For example, the cartridge 14 may include an alignment cartridge protrusion 216a having a circumferential width greater than that of the mounting cartridge protrusion 216b. In such an example, the circumferential width of the alignment body notch 218a will correspondingly be greater than that of the mounting body notch 218b.

[0232] During installation, the alignment cartridge protrusion 216a is axially aligned with the alignment body notch 218a. The circumferential width CW2 of the mounting cartridge protrusion 216b is greater than the circumferential width CW3 of the alignment body notch 218a, such that the mounting cartridge protrusion 216b cannot pass through the alignment body notch 218a during installation. If the mounting cartridge protrusion 216b is aligned with the alignment body notch 218a during installation, the body protrusion 220 supporting the alignment body notch 218a will prevent the mounting cartridge protrusion 216b from passing through the alignment body notch 218a, thereby preventing the cartridge 14 from being installed in this orientation. Although alignment

[0233] When the alignment cartridge protrusion 216a is axially aligned with the alignment body recess 218a, the cartridge 14 is moved in a second axial direction AD2 such that the cartridge protrusion 216 passes through the body recess 218. Accordingly, the cartridge protrusion 216 is located within a receiving chamber 222 formed in the spray gun body 30. The receiving chamber 222 opens in a first axial direction AD1 toward the mixing chamber 110. The mixing chamber 110 does not extend into the receiving chamber 222 and does not radially overlap a portion of the spray gun body 30.

[0234] When the cartridge protrusion 216 passes through the body recess 218, the protrusion 130 radially overlaps the receiver 132. The valve body 60 is disposed within the spray gun body 30 to radially overlap the spray gun body 30. The cartridge 14 may be rotated relative to the spray gun body 30, e.g., about the spray axis SA (alternatively, the spray gun body 30 may be rotated relative to the cartridge 14) to misalign the cartridge protrusion 216 with the body recess 218, thereby locking the cartridge 14 to the spray gun body 30. The relative rotation between the cartridge 14 and the spray gun body 30 axially overlaps the cartridge protrusion 216 with the body protrusion 220. The body protrusion 220 axially overlapping the cartridge protrusion 216 blocks the axial movement of the cartridge protrusion 216, thereby blocking the axial movement of the cartridge 14 in the first axial direction AD1.

[0235] To disassemble the cartridge 14, the cartridge 14 needs to be rotated, for example, about the injection axis SA, so that the cartridge protrusion 216 is realigned with the body notch 218, and then the body mount 84 can be removed from the receiving chamber 222. For example, the cartridge 14 can be rotated in the opposite direction to when the cartridge 14 was installed. Align the cartridge protrusion 216a with the body notch 218a again, and then pull the cartridge 14 in the first axial direction AD1 to disconnect the static interface 126 and remove the cartridge 14 from the spray gun body 30. It will be appreciated that various other locking structures can also be used for the static connection between the cartridge 14 and the spray gun body 30. It should be noted that in this embodiment, the cartridge 14 is not threadedly connected to the spray gun body 30, and only a partial turn (e.g., a quarter turn) rather than a full turn or even a half turn is required to install the cartridge 14 onto the spray gun body 30, but not all embodiments are so limited.

[0236] The dynamic interface 128 includes a valve mount 92 that engages with the drive mount 54. This engagement can also take the form of protrusions and receivers as described previously, with or without projections and grooves. In the example shown, the valve assembly 64 forms the receiver, and the drive piston 46 forms a protrusion that extends into the receiver of the valve assembly 64. However, it will be understood that in various other examples, the drive piston 46 can receive a portion of the valve assembly 64 such that the valve assembly 64 extends into the drive piston 46, thereby forming the dynamic interface 128.

[0237] The drive mount 54 is supported by the drive piston 46. The drive mount 54 can be integrally formed with the drive piston 46, for example, with the piston shaft 50, or can be separately formed and connected to the drive piston 46.

[0238] The valve mount 92 is formed on the valve assembly 64. In the example shown, the valve mount 92 is formed on the coupler 90. In the example shown, the valve mount 92 is coaxially disposed with the body mount 84 on the injection axis SA.

[0239] In the example shown, the drive mount 54 includes a drive projection 224, a groove 226, and a drive mount 228. The drive projection 224 projects radially outward from the piston shaft 50. In the example shown, the drive mount 54 includes a series of radially outward projecting drive projections 224. The drive projections 224 are arranged in an annular pattern around the injection axis SA. The drive mount 228 is spaced apart from the drive projection 224 in the second axial direction AD2. The drive mount 228 is formed as a surface oriented in the first axial direction AD1. The groove 226 is axially disposed between the drive projection 224 and the drive mount 228.

[0240] In the illustrated example, the valve mount 92 includes a valve notch 230 and a valve projection 232. The valve notches 230 are arranged in a ring around the injection axis SA and are spaced between the valve projections 232. The valve projections 232 are provided between adjacent valve notches 230. The valve notches 230 are sized to permit the drive projection 224 to axially pass through the valve notches 230 when the cartridge 14 is mounted to and removed from the spray gun body 30. In the illustrated example, the valve mount 92 is disposed around an aperture 198 that completely axially passes through the coupler 90. However, it should be understood that not all examples are limited to this. For example, the aperture 198 may be open in a second axial direction AD2 and closed in a first axial direction AD1, such as in an example where each gas passage 74a, 74b receives compressed gas from the body cavity 86, or in an example that includes a single gas passage that receives compressed gas from the body cavity 86.

[0241] In the illustrated example, the radial direction of the valve notch 230 is the same as the radial direction of the cartridge projection 216. Similarly, the radial direction of the drive projection 224 is the same as the radial direction of the body notch 218. This radial directionality of the interface assembly facilitates the simultaneous formation and disconnection of the static interface 126 and the dynamic interface 128 during the installation of the cartridge 14 onto the actuator assembly 12 and the removal of the cartridge 14 from the actuator assembly 12.

[0242] During installation, axially aligning the alignment cartridge projection 216a with the alignment body notch 218a also axially aligns the valve notch 230 with the drive projection 224. When the cartridge projection 216 passes through the housing notch 218, the drive projection 224 passes through the valve notch 230. Relative rotation between the cartridge 14 and the spray gun body 30 also causes relative rotation between the valve assembly 64 and the drive piston 46. This relative rotation causes the valve notch 230 to move relative to the drive projection 224, thereby misaligning with the drive projection 224. Relative rotation between the cartridge 14 and the drive piston 46 causes the drive projection 224 to axially overlap with the valve projection 232. The valve projection 232 also axially overlaps with the drive mount 228. The valve projection 232 is at least partially disposed within the recess 226 and is axially supported between the drive projection 224 and the drive mount 228.

[0243] Once the dynamic interface 128 engages, the drive mount 54 can linearly move the coupler 90 through the valve mount 92. For example, the drive projection 224 can apply a force to the valve projection 232 in a second axial direction AD2, causing the valve assembly 64 to move in the second axial direction AD2, while the drive mount 228 can apply a force to the valve projection 232 in a first axial direction AD1, causing the valve assembly 64 to move in the first axial direction AD1.

[0244] Movement of the drive piston 46 in the first axial direction AD1 (downstream direction) causes the coupler 90 to move in the first axial direction AD1, and the coupler 90 applies a driving force to the valve members 88a, 88b to cause the valve members 88a, 88b to move in the first axial direction AD1. Moving the valve members 88a, 88b in the first axial direction AD1 actuates the flow valves 58a, 58b to respective second open states, thereby fluidly connecting the flow chambers 70a, 70b to the mixing chamber 110 and allowing the component A and B materials to flow to the mixing chamber 110 while cutting off the flow of compressed gas to the mixing chamber 110. Movement of the drive piston 46 in the second axial direction AD2 (upstream direction) causes the coupler 90 to move in the second axial direction AD2, and the coupler 90 applies a driving force to the valve members 88a, 88b, thereby causing the valve members 88a, 88b to move in the second axial direction AD2. Moving the valve members 88a, 88b in the second axial direction AD2 actuates the flow valves 58a, 58b back to their respective first open states, thereby fluidly connecting the gas chambers 72a, 72b to the mixing chamber 110 to resume the flow of purge gas while cutting off the flow of component A and B materials to the mixing chamber 110. The drive mechanical movement is transmitted from the drive piston 46 to the valve members 88a, 88b through the coupler 90.

[0245] It should be noted that in some embodiments, the linear movement generated in the actuator assembly 12 and routed through the dynamic interface 128 to the cartridge 14 can be generated by electricity (e.g., by a solenoid or other electric actuator), by pressurized liquid hydraulics, or mechanically by trigger pulling and releasing (e.g., the trigger mechanically moves the drive mount 54 in the first axial direction AD1 and a spring mechanically moves the drive mount 54 in the second axial direction AD2, instead of or in addition to pneumatic actuation). Various other types of dynamic and static interfaces can secure the cartridge 14 and transfer mechanical movement to open and close the flow valves 58a, 58b.

[0246] In the illustrated example, the protrusions and receivers forming the static interface 126 and the dynamic interface 128 are set in opposite configurations. The static interface 126 is formed between a portion of the cartridge 14 that is located within and received by the actuator assembly 12. In the illustrated example, a portion of the valve body 60 extends to and engages a portion of the spray gun body 30, thereby forming the static interface. The dynamic interface 128 is formed between a portion of the cartridge 14 that is located within and received by the actuator assembly 12. In the illustrated example, a portion of the drive piston 46 extends to and engages a portion of the valve assembly 64. However, it should be understood that not all examples are limited in this way. In some examples, the protrusions may all be formed on the cartridge 14, and the receivers may also all be formed on the actuator assembly 12, such that a portion of the cartridge 14 is received within a portion of the actuator assembly 12, thereby forming both the static interface 126 and the dynamic interface. In some examples, the receivers may all be formed on the cartridge 14, and the protrusions may all be formed on the actuator assembly 12, such that certain portions of the actuator assembly 12 are received within certain portions of the cartridge 14, thereby forming the static interface and the dynamic interface. In some examples, certain portions of the actuator assembly 12 extend into certain portions of the cartridge 14 to form the static interface 126, while certain portions of the cartridge 14 extend into certain portions of the actuator assembly 12 to form the dynamic interface 128.

[0247] In the illustrated example, the valve assembly 64 is keyed to the valve body 60. More specifically, the coupler 90 is keyed to the valve body 60. The valve assembly 64 can be considered to form the dynamic part of the cartridge 14, while the valve body 60 and other portions of the cartridge 14 form one or more static parts of the cartridge 14. The dynamic valve assembly 64 is keyed to the valve body 60. In the illustrated example, the coupler 90 is keyed to the valve body 60. Specifically, the outer radial surface of the coupler 90 is non-circular so as to mate with the non-circular inner radial surface of the protrusion 130 of the valve body 60 (defining the valve body cavity 86). In the illustrated example, the outer surface of the coupler 90 is arcuate and has a flat portion, and the inner surface defining the valve body cavity 86 is also arcuate and has a flat portion. The flat portions overlap radially and can engage each other to prevent relative rotation. In the illustrated example, the outer portion of the coupler 90 and the inner surface of the valve body 60 defining the valve body cavity 86 are D-shaped. It will be understood that the coupler 90 and the valve body cavity 86 can have any desired interface shape that is capable of preventing relative rotation, such as, for example, hexagonal, square, triangular, trapezoidal, oval, etc.

[0248] The keyed interface rotationally locks the valve assembly 64 relative to the valve body 60 to effect synchronous rotation. Such a keyed interface protects the valve members 88a, 88b and other portions of the flow valves 58a, 58b from damage that could be caused by relative rotation. The valve members 88a, 88b extend into the valve bores 66a, 66b and are fixed to the coupler 90. If the axial position of the valve assembly 64 is incorrect such that the valve protrusion 232 and the drive protrusion 224 are circumferentially aligned when the cartridge 14 rotates relative to the spray gun body 30 to form the static interface 126 connection, such rotation may apply torque to the valve members 88a, 88b, causing the valve members 88a, 88b to bend or deform. The keyed interface prevents the valve body 60 from rotating relative to the valve assembly 64 about the spray axis SA.

[0249] Rotationally locking the valve assembly 64 relative to the valve body 60 facilitates the simultaneous formation of the connections of the static interface 126 and the dynamic interface 128. During installation, the cartridge 14 is aligned with the receiving chamber 222 of the spray gun body 30. In the illustrated example, both the static interface 126 and the dynamic interface 128 are formed by the relative rotation between the cartridge 14 and the actuator assembly 12. If the valve body 60 could rotate relative to the valve assembly 64, a connection may not be formed at the dynamic interface 128, and / or the dynamic interface 128 may remain connected when the static interface 126 is disconnected. In the illustrated example, the valve body 60 can twist the coupler 90 during rotation to form or disconnect the static interface 126. Preventing relative rotation facilitates the simultaneous formation and disconnection of the static interface 126 and the dynamic interface 128.

[0250] As described above, the manifold 18 can be mounted to the cartridge 14 and locks the cartridge 14 to the spray gun body 30 to prevent relative rotation therebetween. Figure 8CThe gun body groove 178 formed on the lower side of the gun body 30 is shown. In the illustrated example, the gun body groove 178 is formed in the housing 32. The gun body groove 178 is formed on the lower side of the housing 32. The gun body groove 178 is formed on the same side of the housing 32 as where the handle 34 projects. The body groove 178 is configured to receive the manifold bracket 172 that projects from the manifold body 166. The manifold bracket 172 is disposed in the body groove 178 and can prevent the manifold 18 from rotating about the injection axis SA and circumferentially relative to the gun body 30. When the manifold 18 is fixed to the cartridge 14 (e.g., by the fastener 20), due to the rotational locking interface between the manifold 18 and the gun body 30, the cartridge 14 is also prevented from rotating about the injection axis SA. The connection interface between the actuator assembly 12 and the cartridge 14 has significant advantages. The cartridge 14 can be installed by a relative rotation of less than one full turn between the cartridge 14 and the actuator assembly 12. The cartridge 14 does not have a threaded connection (which requires multiple full turns of rotation to form a static interface 126) to the gun body 30. Such a threaded interface may cause misalignment when forming the dynamic interface 128, thereby increasing the complexity of connecting the injector 10 and the cartridge 14. The static interface 126 and the dynamic interface 128 can be considered to form a double protrusion-receiving connection.

[0251] The connection of the dynamic interface 128 and the static interface 126 is set to be formed simultaneously. Both of these connections are formed by the relative axial movement between the cartridge 14 and the actuator assembly 12 and the relative rotational movement between the cartridge 14 and the actuator assembly 12. Both of these connections are disconnected by the relative rotational movement between the cartridge 14 and the actuator assembly 12 and the relative axial movement between the cartridge 14 and the actuator assembly 12. Forming the dynamic and static connections simultaneously enables the quick, efficient, and simple installation and removal of the cartridge 14. The user can easily remove the cartridge 14 and install the same or a different cartridge 14 on the actuator assembly 12 while minimizing downtime, thereby enabling a more efficient injection operation.

[0252] Figure 9 is an exploded view of the valve assembly 64, showing the interface between the valve members 88a, 88b, and the coupler 90. Figure 9 will continue to refer to Figures 1A to 8C for discussion. The valve assembly 64 includes valve members 88a, 88b, a coupler 90, and a valve mount 92. The coupler 90 includes mounting grooves 234a, 234b. Each of the mounting grooves 234a, 234b includes a receiving orifice 236 and a retaining groove 238. Each valve member 88 includes a flow head 98, a flow neck 100, a valve member body 102, a mounting neck 104, a mounting head 106, and a tail 108.

[0253] The valve assembly 64 forms a dynamic part of the cartridge 14 and is configured to move relative to the valve body 60 during operation. The valve assembly 64 controls the flow valves 58a, 58b to switch between a first open state, a second open state, and a closed state.

[0254] The coupler 90 is configured to be connected to a drive part (e.g., the drive piston 46) of the actuator assembly 12 to receive a mechanical input that displaces the coupler 90 along an axis (e.g., the injection axis SA). The valve mount 92 is formed by the coupler 90. The valve mount 92 is arranged around an orifice 198 passing through the coupler 90. Mounting grooves 234a, 234b are formed on the coupler body 233 of the coupler 90. In the illustrated example, the mounting grooves 234a, 234b completely penetrate the coupler body 233 and open along a first axial direction AD1 and a second axial direction AD2. In the illustrated example, each of the mounting grooves 234a, 234b penetrates the first face of the coupler body 233 along the axial AD1 and the second face along the second axial direction AD2, respectively. Each of the mounting grooves 234a, 234b includes a receiving orifice 236 and a retaining groove 238 extending from the receiving orifice 236. The receiving orifice 236 is wider than the retaining groove 238. The wider receiving orifice 236 facilitates the alignment of the valve members 88a, 88b through the mounting grooves 234a, 234b for mounting on the coupler 90. The narrower retaining groove 238 connects the valve members 88a, 88b to the coupler 90 such that the coupler 90 can apply a driving force to the valve members 88a, 88b to move the valve members 88a, 88b in the axial directions AD1, AD2.

[0255] The flow head 98 is configured to engage with the seal bodies 76a, 76b (e.g., directly engage with the seal bodies 76a, 76b, or indirectly engage through a seal disposed between the flow head 98 and the seal bodies 76a, 76b) to control the flow of the component material and the compressed gas to the mixing chamber 110. The flow neck 100 extends between and connects the flow head 98 and the component body 102. The diameter of the flow neck 100 is smaller than that of the flow head 98. The component body 102 extends axially between the flow neck 100 and the mounting neck 104. In the illustrated example, the diameter of the component body 102 is larger than that of the flow neck 100. The mounting neck 104 extends axially between the component body 102 and the mounting head 106. The mounting neck 104 is configured to extend axially through the coupler 90. The mounting neck 104 is configured to be disposed within the mounting grooves 234a, 234b to mount the valve members 88a, 88b to the coupler 90. The mounting head 106 is disposed at the axial end of the mounting neck 104 opposite to the component body 102. In the illustrated example, the valve members 88a, 88b include tails 108 that extend axially from the mounting head 106. The tails 108 project axially away from the mounting neck 104 and are disposed on the axial side of the mounting head 106 opposite to the mounting neck 104. The tails 108 are configured to provide a tool interface to facilitate the removal of the valve assembly 64 from the cartridge 14, e.g., for cleaning or replacement.

[0256] The diameter of the mounting neck 104 is smaller than the diameters of the component body 102 and the mounting head 106. The diameters of the valve member body 102 and the mounting head 106 are larger than the mounting neck 104, which facilitates the coupler 90 to transmit the driving force to the valve bodies 88a, 88b, thereby causing the valve bodies 88a, 88b to move in the first axial direction AD1 or the second axial direction AD2. The coupler 90 applies an axial driving force to the component body 102 to cause the valve bodies 88a, 88b to move in the first axial direction AD1. The coupler 90 applies an axial driving force to the mounting head 106 to cause the valve bodies 88a, 88b to move in the second axial direction AD2.

[0257] To assemble the valve members 88a, 88b to the connector 90, the valve members 88a, 88b pass through the receiving orifice 236 such that the mounting neck 104 is located within the receiving orifice 236 and aligned with the retaining groove 238. Then, the valve members 88a, 88b are moved relative to the connector 90 (or the connector 90 is moved relative to the valve members 88a, 88b) such that the mounting neck 104 is disposed within the retaining groove 238. With the mounting neck 104 disposed within the retaining groove 238, the mounting head 106 and the valve member body 102 are axially overlapped with the body of the connector 90. Then, the connector 90 can apply an axial driving force on the member body 102 to displace the valve members 88a, 88b in the first axial direction AD1 and apply an axial driving force on the mounting head 106 to displace the valve member 88 in the second axial direction AD2.

[0258] Figure 10A is an isometric view of the connector 90'. Figure 10B is a front view of the rear side of the connector 90'. Figure 10A and 10B will be discussed together and continue to refer to Figures 1A to Figure 9 . The connector 90' is substantially similar to the connector 90, except that the connector 90' includes a rotary lock 240. The rotary lock 240 projects from a surface of the connector 90' oriented in the second axial direction AD2. Each rotary lock 240 is formed as an independent projection extending in the second axial direction AD2. The rotary locks 240 are circumferentially disposed between the valve slots 230 of the connector 90'. At least a portion of each rotary lock 240 extends from the valve projection 232. The rotary locks 240 can be considered to be axially overlapped with the valve projections 232.

[0259] The configuration of the rotary locks 240 is to ensure that a dynamic interface 128 is formed when a static interface 126 is formed between the cartridge 14 and the actuator assembly 12. For example, when attempting to mount the cartridge 14 to the actuator assembly 12, the valve assembly 64 may be fully displaced in the first axial direction AD1. However, the drive piston 46 is displaced in the second axial direction AD2 such that the injector 10 is in a non-injecting state during initial installation. When the valve assembly 64 moves forward and the drive piston 46 moves backward, an axial gap is created between the valve mount 92 and the drive mount 54, thereby forming a static interface 126 but not a dynamic interface 128. In such an example, initiating the flow of the multi-component material into the cartridge 14 will cause the multi-component material to flow into and mix within the mixing chamber 110, but since the dynamic connection is not formed, the flow of the component material cannot be cut off.

[0260] The rotary lock 240 extends from the coupler 90' and is configured such that during installation, as the valve assembly 64 moves forward and the drive piston 46 moves backward, the rotary lock 240 extends into the circumferential gap between the drive protrusions 224. The rotary lock 240 circumferentially overlaps the drive protrusions 224 to prevent the cartridge 14 from rotating along the injection axis SA to form a static connection. This rotational resistance informs the user that the valve assembly 64 needs to be displaced in the second axial direction AD2 (e.g., by gripping the tail 108 using tools such as pliers, or by gripping the coupler 90' through the orifice 198, among other options). When the drive mount 54 and the valve mount 92 are aligned to form the dynamic interface 128, the rotary lock 240 does not inhibit the rotation of the cartridge 14. Although the coupler 90' is described as including the rotary lock 240, it should be understood that not all examples are limited to this. For example, the dimensions of the cartridge 14 and the actuator assembly 12 can be designed such that when the valve assembly 64 is fully forward and the drive piston 46 is fully backward, the drive protrusions 224 and the valve protrusions 232 overlap circumferentially, and this interface can also prevent the formation of the static interface 126 when the drive mount 54 and the valve mount 92 are misaligned to form the dynamic interface 128.

[0261] Figure 11A is a partial cross-sectional view taken along Figure 1A the centerline 11-11, showing the shut-off member 22 in the unlocked state. Figure 11B is a partial cross-sectional view similar to Figure 11A but showing the shut-off member 22 in the locked state. Figure 11A and 11B will be discussed in conjunction with Figures 1A to Figure 10B together. The spray gun body 30, the shut-off member 22, the drive piston 46, and the metering piston 48 of the injector 10 are shown in the figures. The shut-off member 22 includes a knob 42, a converter 112, a connector 114, a shut-off fastener 142, and a spring 242. The converter 112 includes a locator 118 and a converter body 116. The converter body 116 includes a lock groove 244. The connector 114 includes a connector shaft 120 and a connector head 122.

[0262] The shut-off member 22 is connected to the drive piston 46 and is configured to control the operability of the drive piston 46, thereby controlling whether the injector 10 can be actuated to the injection state. The shut-off member 22 is connected to the valve assembly 64 through the drive piston 46. The shut-off member 22 is supported by the spray gun body 30. The shut-off member 22 is configured to actuate the valve assembly 64 in the second axial direction AD2 away from the injection port 28 of the mixing chamber 110. The shut-off member 22 can actuate the valve assembly 64 in the second axial direction AD2 such that each flow valve 58a, 58b is in its respective first open state, in which the flow of the A and B component materials to the mixing chamber 110 is blocked, thereby preventing the injector 10 from ejecting the multi-component material.

[0263] The knob 42 is disposed outside the spray gun body 30 and can be operated from the outside of the injector 10. The user can control the actuation of the stop member 22 between the locked and unlocked states by the knob 42. The knob 42 is rotatable about the injection axis SA to control the actuation of the stop member 22 between the locked and unlocked states.

[0264] A spring 242 is disposed between the knob 42 and the spray gun body 30. The spring 242 is configured to bias the knob 42 in a second axial direction AD2 and away from the spray gun body 30. The spring 242 can engage the locator 118 into the detent 246 in the lock slot 244 of the adapter 112 to hold the stop member 22 in the locked state, as discussed in more detail below.

[0265] The connector 114 is connected to the drive piston 46. In the illustrated example, the connector head 122 is at least partially located within the piston head 52 of the drive piston 46. The connector 114 is held within the cavity of the piston head 52 by a retainer 248. The retainer 248 is mounted to the drive piston 46 and configured to prevent the connector 114 from moving relative to the drive piston 46 in the second axial direction AD2. The retainer 248 can be formed as a complete ring that extends entirely around the injection axis SA or as one or more partial rings that extend partially around the injection axis SA. The connector shaft 120 extends in the second axial direction AD2 away from the drive piston 46. The connector shaft 120 extends into the adapter body 116 and radially overlaps a portion of the adapter body 116.

[0266] The adapter 112 is operatively connected to the connector 114 and the knob 42. The adapter 112 is operatively connected to the connector 114 such that the adapter 112 is capable of axially moving the connector 114 along the injection axis SA in the second axial direction AD2. The adapter 112 is also operatively connected to the connector 114 such that the adapter is capable of preventing the connector 114 from shifting in a first axial direction AD1, thereby preventing the drive piston 46 from shifting in the first axial direction AD1. When the stop member 22 is in the unlocked state ( Figure 11A ), the connector 114 is capable of moving axially relative to the adapter body 116. When the stop member 22 is in the locked state ( Figure 11B ), the connector 114 is held in a fixed position along the injection axis SA, thereby preventing the injector 10 from being actuated to the injection state.

[0267] The converter 112 is configured to convert a rotational input from the knob 42 into a linear input of the connector 114. The converter 112 is configured to convert a rotational input from the knob 42 into an axial movement of the connector 114 along the injection axis SA so as to actuate the drive piston 46 to move from a forward position associated with the injection state of the injector 10 to a backward position associated with the non-injection state of the injector 10.

[0268] The locator 118 is supported by the connector 114. In the illustrated example, the locator 118 is supported by the connector shaft 120. In the illustrated example, the locator 118 extends through the connector shaft 120. The locator 118 extends radially outward from the connector shaft 120. The locator 118 is configured to engage with the converter body 116. In the illustrated example, the locator 118 extends into a locking groove 244 formed in the converter body 116. The locator 118 forms a linear displacer of the converter 112.

[0269] The converter body 116 is connected to the knob 42 by a stop fastener 142. The stop fastener 142 fixes the converter 112 and the knob 42 together. The converter body 116 is connected to the knob 42 for simultaneous rotation such that rotation of the knob 42 causes rotation of the converter body 116. In the illustrated example, the converter body 116 is coaxially arranged with the injection axis SA and is configured to rotate about the injection axis SA. The converter body 116 forms a rotational input of the converter 112.

[0270] Locking grooves 244 are provided on the converter body 116. In the illustrated example, each locking groove 244 extends completely through the converter body 116 and is located between the outer radial surface and the inner radial surface of the converter body 116. In the illustrated example, the locking grooves 244 extend helically about the injection axis SA. The locking grooves 244 extend between a free end 250 and a locking end 252. The axial length of the free end 250 is greater than that of the locking end 252. When the locator 118 is located at the free end 250, it can axially move relative to the converter body 116, while when it is located at the locking end 252, its axial movement is restricted.

[0271] The locking groove 244 includes an inclined surface 254 which is configured to engage with the locator 118 to axially move the locator 118. The inclined surface 254 exerts a driving force on the locator 118 to move the locator 118 in the second axial direction AD2.

[0272] The locator 118 may include a pin, a knob, or other protrusion that engages a helical structure (e.g., a locking groove 244) of the adapter body 116. The helical locking groove 244 may partially or fully surround an axis, among other options. In the illustrated example, the locking groove 244 does not fully extend around the injection axis SA. The locator 118 may be fixed to translate linearly only along the injection axis SA, such that connection to the rotating helical structure of the adapter body 116 causes the pin, knob, or other protrusion forming the locator 118 to move linearly along the axis. It will be appreciated that while the locator 118 is connected to the connector 114 in the illustrated example, the locator 118 may be directly or indirectly connected to the drive piston 46, which is indirectly connected to the valve members 88a, 88b via the coupler 90.

[0273] The shutoff member 22 can be switched between a locked state and an unlocked state. To actuate the shutoff member 22 from the unlocked state to the locked state, the knob 42 needs to be rotated in a first rotational direction (e.g., clockwise or counterclockwise) along the injection axis SA. Rotating the knob 42 causes the adapter body 116 to rotate in the same direction as the knob 42. The adapter body 116 rotates relative to the locator 118 to position the locator 118 within the locking end 252 of the locking groove 244. When the locator 118 is located within the locking end 252 of the locking groove 244, the adapter body 116 prevents axial movement of the locator 118 in a first axial direction AD1. The locator 118 is connected to the adapter body 116, preventing the connector 114 fixed to the locator l18 from moving in the first axial direction AD1, and thus preventing the drive piston 46 and the valve assembly 64 from moving in the first axial direction AD1. The injector 10 is thereby locked in a non-injecting state.

[0274] When the shutoff member 22 is in the locked state, the locator 118 is located at the locking end 252 of the locking groove 244 and is prevented from moving in the first axial direction AD1. The locator 118 is connected to the connector 114, thereby preventing the connector 114 from moving in the first axial direction AD1. The connector 114 is connected to the drive piston 46, thereby preventing the drive piston 46 from moving in the first axial direction AD1. Accordingly, the drive piston 46 cannot actuate the valve assembly 64, and the injector 10 is locked in a non-injecting state.

[0275] To actuate the shut-off member 22 from the locked state to the unlocked state, the knob 42 is rotated in a second rotational direction (e.g., the other of clockwise and counterclockwise) along the injection axis SA. The converter body 116 rotates in the same rotational direction as the knob 42. The converter body 116 rotates relative to the locator 118 to position the locator 118 within the free end 250 of the lock slot 244. When the locator 118 is located at the free end 250 of the lock slot 244, the converter body 116 does not impede the axial movement of the locator 118 in the first axial direction AD1. Accordingly, the drive piston 46 is able to move in the first axial direction AD1 to actuate the valve assembly 64 and place the injector 10 in the injection state.

[0276] When the shut-off member 22 is in the unlocked state ( Figure 11A ), the locator 118 is located at the free end 250 of the lock slot 244 and is able to move axially within the lock slot 244. The locator 118 is able to move axially relative to the converter body 116. When the locator 118 is able to move axially relative to the converter body 116, the connector 114 can move axially and the drive piston 46 can also move axially. The drive piston 46 can move in the first axial direction AD1 along the injection axis SA so that the injector 10 can be actuated from the non-injection state to the injection state. The drive piston 46 can also move in the second axial direction AD2 along the injection axis SA so that the injector 10 can be actuated from the injection state to the non-injection state.

[0277] In the example shown, the mechanical movement of the moving valve members 88a, 88b is derived from a pneumatic operation initiated by the trigger 24. However, in rare instances, when the injector 10 is in the injection state and injecting, the air pressure (or hydraulic pressure in an example including hydraulic actuation) may be lost, and since the trigger 24 cannot move the drive piston 46 pneumatically (or hydraulically), a quick manual shut-off of the A and B component material flows is required to stop the injection of the multi-component material. This movement is provided by the shut-off member 22. The shut-off member 22 is attached to the drive piston 46 and can move the drive piston 46 in the second axial direction AD2 to pull the valve members 88a, 88b rearward, closing the flow valve 58a to cut off the flow of the A component to the mixing chamber 110 and closing the flow valve 58b to cut off the flow of the B component to the mixing chamber 110.

[0278] In the case of pneumatic (or hydraulic) flow loss, the user rotates knob 42. Knob 42 rotates converter body 116. Converter body 116 rotates about injection axis SA, and inclined surface 254 contacts locator 118 and causes the locator to move along inclined surface 254. As converter body 116 rotates, locator 118 linearly moves in the second axial direction AD2. Locator 118 is driven along the inclined surface to the locking end 252 of locking groove 244. As locator 118 moves along inclined surface 254, locator 118 is displaced in the second axial direction AD2.

[0279] Locator 118 pulls connector 114 in the second axial direction AD2, and connector 114 pulls drive piston 46 in the second axial direction AD2. Drive piston 46 pulls valve assembly 64 in the second axial direction AD2 to cut off the flow of component A and component B materials to mixing chamber 110, thereby cutting off the injection of multi-component materials. Therefore, in the case of pneumatic (or hydraulic) pressure loss, shut-off member 22 can actuate injector 10 from the injection state to the non-injection state.

[0280] The user can actuate shut-off member 22 through knob 42. Actuation of knob 42 provides a mechanical input to converter 112. In this embodiment, converter 112 converts rotational motion into linear motion. More specifically, knob 42 can be rotated to provide a rotational input to converter 112. Due to the connection between locator 118 and connector 114, converter 112 axially moves connector 114 in the second axial direction AD2. Connector 114 is connected to drive piston 46 and can mechanically move drive piston 46.

[0281] Figure 12A is a first exploded view of shut-off member 22 and drive piston 46. Figure 12B is a second exploded view of shut-off member 22. Figure 13A is an isometric view of shut-off member 22 and drive piston 46, showing shut-off member 22 in the unlocked state. Figure 13B is an isometric view of the shut-off member and the drive piston, showing the shut-off member in the locked state. Figures 12A - 13B will be discussed together and continue to refer to Figures 1A - 11B . Shut-off member 22 includes knob 42, converter 112, connector 114, shut-off fastener 142, and spring 242. Converter 112 includes locator 118 and converter body 116. Converter body 116 includes locking groove 244, groove body 256, and mounting body 258. Connector 114 includes connector shaft 120 and connector head 122.

[0282] The shut-off member 22 can be switched between a locked state and an unlocked state. In the locked state, the shut-off member 22 locks the injector 10 in a non-injecting state; in the unlocked state, the injector 10 can be actuated between a non-injecting state and an injecting state. By switching the shut-off member 22 from the unlocked state to the locked state, the shut-off member 22 can switch the injector 10 from the injecting state to the non-injecting state.

[0283] The knob 42 is configured to be at least partially disposed outside the spray gun body 30. The user can operate the knob 42 from outside the injector 10. The knob 42 is rotatable about the injection axis SA and is configured to actuate the shut-off member 22 between the locked and unlocked states. The spring 242 cooperates with the knob 42 and is configured to bias the knob 42 in a second axial direction AD2. The spring 242 is disposed between the knob 42 and the spray gun body 30. The spring 242 shown in the figure is a wave spring, but it can be understood that other types of springs are also feasible.

[0284] The connector 114 is connected to the drive piston 46 so as to move along the injection axis SA together with the drive piston 46. In the illustrated example, the connector head 122 is at least partially located within the piston head 52 of the drive piston 46. The retainer 248 is mounted on the piston head 52 and axially overlaps the connector head 122. The retainer 248 fixes the connector head 122 within a chamber formed within the piston head 52 of the drive piston 46. The retainer 248 fixes the connector 114 to the drive piston 46.

[0285] The converter 112 is connected to the knob 42 and the drive piston 46. In the illustrated example, the converter 112 is indirectly connected to the drive piston 46 through the connector 114. The converter 112 can convert the rotational input of the knob 42 into a linear movement of the drive piston 46 in the second axial direction AD2, axially away from the injection orifice 28 of the mixing chamber 110.

[0286] The locator 118 is mounted on the connector 114. In the illustrated example, the locator 118 is mounted on the connector shaft 120. The locator 118 extends completely through the connector shaft 120 such that each end of the locator 118 projects radially outward from the connector shaft 120. Each radial end of the locator 118 extends into and is located within the locking groove 244.

[0287] The converter body 116 is mounted to the knob 42 so as to rotate coaxially with the knob 42. In the illustrated example, the mounting body 258 of the converter body 116 is at least partially disposed within a knob cavity 260 formed within the knob 42. The cutoff fastener 142 is at least partially disposed within the converter body 116. The cutoff fastener 142 extends through the mounting body 258 and into the knob 42. The cutoff fastener 142 may include external threads configured to engage internal threads within the knob 42. The cutoff fastener 142 axially fixes the converter body 116 and the knob 42 relative to each other.

[0288] In the illustrated example, the base body 258 is keyed to the knob 42 to prevent relative rotation between the base body 258 and the knob 42. The outer surface of the base body 258 is non-circular, and the inner surface of the knob cavity 260 also has a corresponding non-circular shape to match the outer surface of the base body 258. In the illustrated example, the outer surface of the base body 258 includes a conversion plane 262 that mates with a corresponding knob plane 264 formed on the knob 42. However, it will be understood that the keying interface can take any desired shape. For example, the outer surface of the base body 258 and the inner surface of the knob cavity 260 can be hexagonal, square, oval, triangular, and other non-circular shapes.

[0289] The slot body 256 extends from the mounting body 258 in a first axial direction AD1. A locking slot 244 is formed in the slot body 256. In the illustrated example, the locking slot 244 extends helically around the slot body 256. The locking slot 244 extends axially and circumferentially around the slot body 256. In the illustrated example, the converter body 116 includes a pair of locking slots 244, and both ends of the locator 118 extend into the locking slots 244. When the cutoff member 22 actuates the drive piston 46 in a second axial direction AD2 (e.g., in the case of a pressure loss), and when the cutoff member 22 is in the locked state and holds the injector 10 in the non-injecting state, the double-slot structure of the converter body 116 can balance the forces on the locator 118. The interface between the converter body 116 and the locator 118 is located radially outside the injection axis SA, and the holding force is balanced by the double-slot structure.

[0290] Each locking slot 244 extends between a free end 250 and a locking end 252. The axial length of the free end 250 is longer than the axial length of the locking end 252. In the illustrated example, the free end 250 opens in the first axial direction AD1 to allow the locator 118 to enter and exit the converter body 116 during the assembly or disassembly of the injector 10. The size of the spray gun body 30 is designed such that the locator 118 remains within the locking slot 244 even when the drive piston 46 is fully displaced in the first axial direction AD1 during the operation of the injector 10.

[0291] In the illustrated example, a pawl 246 is formed at the locking end 252. The pawl 246 extends along a first axial direction AD1 such that a portion of the structure of the converter body 116 circumferentially overlaps the pawl 246. The pawl 246 is configured to receive an end portion of the locator 118 when the stopper 22 is in the locked state.

[0292] Figure 13A and 13B shown in the unlocked state (as Figure 13A shown in the configuration where the injector 10 is in the injection state) and the locked state ( Figure 13B ). As described above, the stopper 22 can actuate the injector 10 from the injection state to the non-injection state in the case of pressure loss, and can also lock the injector 10 in the non-injection state. Whether the injector 10 is in the injection state or the non-injection state, the stopper 22 can be actuated to the locked state.

[0293] To actuate the injector 10 from the injection state to the non-injection state, the knob 42 is rotated to rotate the converter body 116. The inclined surface 254 of the lock groove 244 engages with the end portion of the locator 118 and linearly translates the locator 118 along a second axial direction AD2. The inclined surface 254 is arcuate so as to displace the locator 118 when the converter body 116 rotates. The locator 118 is connected to 114, and the connector 114 is connected to the drive piston 46 such that the converter 112 pulls the drive piston 46 along the second axial direction AD2. The knob 42 is rotated until the locator 118 reaches the locking end 252 of the lock groove 244. The spring 242 biases the knob 42 along the second axial direction AD2 to move the locator 118 into the pawl 246. When the locator 118 is located at the locking end 252 of the lock groove 244, the injector 10 is locked in the non-injection state. When the locator 118 is located in the pawl 246, the knob 42 cannot freely rotate about the injection axis SA, thereby placing the stopper 22 in the unlocked state.

[0294] To actuate the stopper 22 to the unlocked state, the knob 42 is rotated to rotate the converter body 116. The converter body 116 rotates relative to the locator 118 such that the locator 118 is located at the free end 250 of the lock groove 244. In the illustrated example, the pawl 246 fixes the stopper 22 in the locked state. To actuate the stopper 22 to the unlocked state, the knob 42 is pressed along the first axial direction ADl to compress the spring 242 and displace the converter body 116 relative to the locator 118 along the first axial direction AD1. In this way, the locator 118 moves out of the pawl 246, and then the knob 42 can be rotated to place the stopper 22 in the unlocked state.

[0295] The shut-off member 22 has significant advantages. By rotating the knob 42, the shut-off member 22 can be actuated between a locked state and an unlocked state. The rotation of the knob 42 can cause linear displacement of the drive piston 46 and the valve assembly 64, thereby actuating the injector 10 from an injection state to a non-injection state. The shut-off member 22 can also lock the injector 10 in the non-injection state to prevent the injector 10 from being actuated to the injection state. The shut-off member 22 provides a single mechanism that can both cut off injection and lock the injector 10 to prevent injection. The user can easily operate the shut-off member 22 to quickly actuate the injector 10 to the non-injection state, prevent material loss, and prevent accidental injection in case of pressure loss. The shut-off member 22 engages with the drive piston 46 to physically lock the drive piston 46 to prevent the injector 10 from being actuated to the injection state. In the illustrated example, the shut-off member 22 can be considered to form a trigger lock because the shut-off member 22 prevents the injector 10 from triggering to the injection state, but the shut-off member 22 does not directly engage with the trigger 24. Thus, even when the shut-off member 22 is in the locked state, the trigger 24 can still be actuated, but such actuation will not cause the injector 10 to be actuated to the injection state.

[0296] Although the present invention has been described in connection with exemplary embodiments, those skilled in the art will understand that various changes can be made and elements thereof can be replaced with equivalents without departing from the scope of the present invention. In addition, various modifications can be made without departing from the basic scope of the present invention to adapt a particular situation or material to the teachings of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed, but covers all embodiments falling within the scope of the appended claims. In addition, although some options are shown in the figures, it should be understood that these options are not necessarily present and certain aspects can be deleted or replaced.

Claims

1. A cartridge for use with a multi-component spray gun, the multi-component spray gun having a gun body and configured to receive a first component material and a second component material that are mixed to form a multi-component material, the cartridge comprising: A valve body that extends between a first body end and a second body end; A first flow valve located within the valve body; A second flow valve located within the valve body; And A mixing chamber cavity that extends along an injection axis into the first body end of the valve body, the mixing chamber cavity being configured to receive at least a portion of the mixing chamber of the multi-component spray gun; Wherein the cartridge can be removed from the gun body as a single module; and Wherein, if the mixing chamber has not been removed from the cartridge, removing the cartridge from the gun body necessarily disconnects any connection of the mixing chamber to the gun body.

2. The barrel according to claim 1, wherein, The mixing chamber cavity does not extend through the second body end.

3. The barrel according to claim 1, wherein, The mixing chamber cavity opens at the first body end of the valve body such that the mixing chamber can be removed from the first body end of the valve body, and wherein the mixing chamber cavity is partially or completely enclosed relative to the second body end of the valve body such that the mixing chamber cannot move through the second body end.

4. The barrel according to any one of claims 1 to 3, wherein, The mixing chamber is in direct contact with the cartridge and can be removed to disengage from the contact with the cartridge, but the mixing chamber is not in direct contact with the gun body during spraying.

5. The barrel according to any one of claims 1 to 4, wherein The mixing chamber is received by the cartridge and can be removed from the cartridge, and the mixing chamber does not contact the gun body during spraying.

6. The cartridge according to any one of claims 1 to 4, wherein: The valve body defines a first material path between a first material inlet and the mixing chamber cavity; The valve body defines a second material path between a second material inlet and the mixing chamber cavity; and The first material path and the second material path are fluidly separated such that the first component material and the second component material flow into the valve body respectively and flow out from the first body end and are mixed together to form the multi-component material.

7. The barrel according to any one of claims 1 to 6, wherein, The first body end is configured to be connected to an air cap.

8. The barrel according to claim 7, wherein, The air cap holds the mixing chamber within the cartridge, and separation of the air cap from the cartridge allows the mixing chamber to be removed from the first body end of the cartridge and removed from the cartridge.

9. The barrel according to any one of claims 7 and 8, wherein, Threads are formed at the first body end of the valve body, and the threads are configured to connect the air cap to the cartridge.

10. The cartridge according to any one of claims 1 to 9, further comprising: A first valve hole that extends from the second body end along a first valve axis deviating from the injection axis into the valve body; A second valve hole that extends from the second body end along a second valve axis deviating from the injection axis into the valve body; Wherein the first flow valve is disposed within the first valve hole; and Wherein the second flow valve is disposed within the second valve hole.

11. The barrel according to claim 10, wherein, The first valve hole does not open through the first body end.

12. The barrel according to claim 11, wherein, The second valve hole does not open through the first body end.

13. The cartridge according to any one of claims 10 to 12, wherein: A first air chamber is formed within the first valve bore; A first flow chamber is formed within the first valve bore; The first air chamber is in fluid connection with the mixing chamber bore, wherein the first flow valve is in a first open state such that compressed gas can flow from the first air chamber to the mixing chamber bore; and The first flow chamber is in fluid connection with the mixing chamber bore, wherein the first flow valve is in a second open state such that the component material can flow from the first flow chamber to the mixing chamber bore.

14. The barrel according to claim 13, wherein When the first flow valve is in the second open state, the first air chamber is fluidly disconnected from the mixing chamber bore, and wherein when the first flow valve is in the first open state, the first flow chamber is fluidly disconnected from the mixing chamber bore.

15. The barrel according to any one of claims 10 to 14, wherein, A first feed hole is formed in the valve body and extends between the first valve bore and the mixing chamber cavity and fluidly connects the first valve bore and the mixing chamber cavity, and a second feed hole is formed in the valve body and extends between the second valve bore and the mixing chamber cavity and fluidly connects the second valve bore and the mixing chamber cavity.

16. The cartridge according to any one of claims 1 to 15, further comprising: A first gas passage passing through the second body end opening, wherein at least a portion of the first gas passage is disposed on the injection axis.

17. The barrel according to any one of claims 1 to 16, wherein, The entirety of the first flow valve and the entirety of the second flow valve are removed from the multi-component spray gun together with the cartridge.

18. The cartridge according to any one of claims 1 to 17, wherein a body coupler is formed at the second body end, the body coupler being configured to engage with the spray gun body to form a static interface for supporting the cartridge on the spray gun body.

19. The barrel according to claim 18, wherein, The body mount includes at least one protrusion that projects radially outward relative to the injection axis.

20. The cartridge according to claim 19, wherein the at least one protrusion is formed on the exterior of the valve body.

21. The cartridge according to any one of claims 1 to 20, further comprising: A body cavity formed in the valve body and opening through the second body end; A valve assembly disposed at least partially within the body cavity, the valve assembly being movable along the injection axis to actuate the first flow valve and the second flow valve to open and close the flow path to the mixing chamber cavity.

22. The barrel according to claim 21, wherein, A cavity wall is formed at an axial end of the body cavity, the cavity wall being disposed between the first body end and the second body end.

23. The cartridge according to claim 1, further comprising: A body cavity formed in the valve body and opening through the second body end; A first valve bore extending into the valve body and leading to the body cavity; A second valve bore extending into the valve body and leading to the body cavity; A valve assembly disposed at least partially within the body cavity, the valve assembly being movable along the injection axis to actuate the first flow valve and the second flow valve to open and close the flow path to the mixing chamber cavity, the valve assembly including: A first valve member disposed at least partially within the first valve bore and movable along the first valve bore; A second valve member, at least partially disposed in the second valve bore and movable along the second valve bore; and A coupler connected to each of the first valve member and the second valve member, at least partially disposed within the body cavity.

24. The cartridge according to claim 23, further comprising: A first seal disposed within the first valve bore, the first flow valve being formed between the first seal and the first valve member; A second seal disposed within the second valve bore, the second flow valve being formed between the second seal and the second valve member.

25. The barrel according to claim 24, wherein, The first valve member is configured to slide along the valve axis of the first valve bore and relative to the first seal.

26. The barrel according to claim 25, wherein, The first valve member is in sealing engagement with the first seal, wherein the first flow valve is opened to allow the first component material to flow to the mixing chamber bore, and the first flow valve is closed to prevent the first component material from flowing to the mixing chamber bore.

27. A multi-component spray gun configured to receive a first component material and a second component material and output a spray of the multi-component material, the multi-component spray gun comprising: A spray gun body; A handle extending from the spray gun body; A trigger supported by the spray gun body; A cartridge removably mounted to the spray gun body, the cartridge comprising: A valve body extending between a first body end and a second body end, the second body end configured to engage with the spray gun body to connect the cartridge to the spray gun body; A first flow valve located within the valve body; A second flow valve located within the valve body; and A mixing chamber cavity extending along the spray axis to the first body end of the valve body; Wherein the cartridge can be removed from the spray gun body as a single module; A mixing chamber that can be installed within the mixing chamber cavity; Wherein, if the mixing chamber has not been removed from the cartridge, removing the cartridge from the spray gun body will necessarily disconnect any connection between the mixing chamber and the spray gun body.

28. The multi-component spray gun according to claim 27, further comprising: An air cap removably connected to the first body end, the air cap holding the mixing chamber within the mixing chamber cavity.

29. The multi-component spray gun according to any one of claims 27 and 28, further comprising: A manifold fluidly connected to the cartridge, the manifold configured to supply the first component material to the cartridge and supply the second component material to the cartridge.

30. The multi-component spray gun according to claim 29, wherein, The manifold is mounted to the cartridge.

31. The multi-component spray gun according to claim 30, wherein, The manifold is mounted to the cartridge by a fastener extending through the manifold body and into the valve body.

32. The multi-component spray gun according to any one of claims 29 to 31, wherein, The manifold engages with the spray gun body to inhibit rotation of the cartridge relative to the spray gun body.

33. The multi-component spray gun according to any one of claims 27 to 32, wherein, The cartridge further comprises: A valve assembly movable relative to the valve body, the valve assembly forming the movable valve member of the first flow valve and the movable valve member of the second flow valve.

34. The multi-component spray gun according to claim 33, wherein: The cartridge is mounted to the spray gun body through a static interface and a dynamic interface; The static interface is formed between the valve body and the spray gun body; The dynamic interface is formed between the valve assembly and a drive piston at least partially disposed within the spray gun body; And The dynamic interface transfers mechanical force from the drive piston to the valve assembly to actuate the flow valve between a first state and a second state, in the first state, the flow of the first component material and the second component material to the mixing chamber is blocked, and in the second state, the flow of the first component material and the second component material to the mixing chamber is not blocked.

35. The multi-component spray gun according to any one of claims 27 to 34, wherein, The first component material and the second component material do not flow within the spray gun body.

36. The multi-component spray gun according to any one of claims 27 to 35, wherein, The first component material does not enter the cartridge through either the first body end or the second body end.

37. The multi-component spray gun according to claim 36, wherein, The second component material does not enter the cartridge through either the first body end or the second body end.

38. A cartridge for use with a multi-component spray gun having an actuator assembly including a spray gun body and a displacer, the cartridge configured to receive a first component material and a second component material that are mixed to form a multi-component material, the cartridge comprising: A valve body extending along an axis between a first body end and a second body end; A mixing chamber cavity formed in the valve body; A first flow valve located within the valve body; A second flow valve located within the valve body; A valve mount configured to engage the actuator assembly at a dynamic interface to receive a mechanical input to actuate the first flow valve and the second flow valve between a corresponding first state and a corresponding second state, in the first state, the flow of the first component material and the second component material to the mixing chamber cavity is closed, and in the second state, the flow of the first component material and the second component material to the mixing chamber cavity is open; And A body mount formed on the valve body and configured to engage the actuator assembly at a static interface to mount the cartridge to the spray gun body; Wherein the cartridge can be mounted to and removed from the actuator assembly as a single unit.

39. The cartridge according to claim 38, further comprising: A valve assembly supported by the valve body and movable relative to the valve body, wherein the valve assembly includes a first valve member of the first flow valve and a second valve member of the second flow valve; Wherein the valve mount is formed on the valve assembly.

40. The barrel according to claim 39, wherein, The valve assembly further includes: A coupler connected to the first valve member and the second valve member; Wherein the valve mount is formed on the coupler.

41. The cartridge according to claim 40, wherein the valve mount is formed around an orifice extending through the coupler.

42. The cartridge according to any one of claims 40 and 41, wherein the coupler is formed as a plate.

43. The barrel according to any one of claims 39 to 42, wherein, The valve assembly extends into the valve body through the second body end.

44. The cartridge according to any one of claims 39 to 43, further comprising: a first valve hole formed in the valve body and leading to the second body end, the first flow valve being disposed within the first valve hole; a second valve hole formed in the valve body and leading to the second body end, the second flow valve being disposed within the second valve hole.

45. The barrel according to claim 44, wherein, The first valve member is elongate and extends along a first valve axis of the first valve hole, and the second valve member is elongate and extends along a second valve axis of the second valve hole.

46. The barrel according to claim 45, wherein, The first valve axis is parallel to and offset from the axis, and wherein the second valve axis is parallel to and offset from the axis.

47. The barrel according to any one of claims 44 to 46, wherein The first valve hole does not pass through the first body opening, and the second valve hole does not pass through the first body end opening.

48. The barrel according to any one of claims 38 to 47, wherein, The valve mount is formed by at least one valve protrusion extending radially.

49. The barrel according to claim 48, wherein, The at least one valve protrusion extends radially inward.

50. The barrel according to any one of claims 38 to 49, wherein, The body mount is formed by at least one cartridge protrusion extending radially.

51. The cartridge according to claim 50, wherein the at least one cartridge protrusion extends radially outward.

52. The cartridge according to any one of claims 38 to 51, wherein: the valve body includes a block, the first flow valve and the second flow valve being disposed within the block; the valve body includes a protrusion extending from the block to the second body end; and the body mount is formed on the protrusion.

53. The barrel according to claim 52, wherein, The mixing chamber cavity does not extend completely axially through the block.

54. The barrel according to any one of claims 38 to 53, wherein, The mixing chamber cavity does not pass through the second body end opening.

55. The barrel according to any one of claims 38 to 54, wherein, The static interface forms a pneumatic connection between the cartridge and the actuator assembly, wherein compressed gas routed through the spray gun body is further routed into the valve body.

56. The cartridge according to claim 38, further comprising: a coupler, the coupler being at least partially disposed within the valve body, the coupler configured to move along the axis to actuate the first flow valve and the second flow valve between respective first states and respective second states; wherein the valve mount is formed on the coupler.

57. The cartridge according to claim 56, further comprising: a first valve member, the first valve member being connected to the coupler to move therewith, the first valve member extending from the coupler and into a first valve hole formed within the valve body; and a second valve member, the second valve member being connected to the coupler to move therewith, the second valve member extending from the coupler and into a second valve hole formed within the valve body.

58. The barrel according to claim 57, wherein, The first valve member and the second valve member extend through the coupler.

59. The cartridge according to any one of claims 57 and 58, wherein the first valve member engages the coupler at a first position radially outward of the valve mount, and the second valve member engages the coupler at a second position radially outward of the valve mount.

60. A cartridge for use with a multi-component injector having an actuator assembly including a gun body and a displacer, the cartridge configured to receive a first component material and a second component material that are mixed to form a multi-component material, the cartridge comprising: A valve body extending along an axis between a first body end and a second body end, the valve body including the body mount configured to engage with the gun body to fix the valve body to the gun body; A mixing chamber cavity formed in the valve body and opening through the first body end; And A valve assembly supported by the valve body, the valve assembly movable along the axis and relative to the valve body to open and close a flow path for the first component material and the second component material to flow to the mixing chamber cavity, the valve assembly including a valve mount configured to engage with the displacer to fix the valve assembly to the displacer; Wherein the cartridge can be mounted to and removed from the actuator assembly as a single unit.

61. The cartridge according to claim 60, wherein the body mount and the valve mount are coaxially disposed on the axis.

62. The cartridge according to any one of claims 60 and 61, wherein the body mount includes a plurality of cartridge protrusions extending from the valve body.

63. The cartridge according to claim 62, wherein the plurality of cartridge protrusions extend radially outward.

64. The barrel according to any one of claims 62 and 63, wherein, The plurality of cartridge protrusions include an alignment cartridge protrusion having a first circumferential width and a mounting cartridge protrusion having a second circumferential width, the first circumferential width being less than the second circumferential width.

65. The barrel according to any one of claims 62 to 64, wherein, The valve body includes: A block, the mixing chamber cavity being formed in the block; A protrusion extending from one end of the block to the second end of the valve body, wherein the body mount is formed on the protrusion.

66. The cartridge according to claim 65, wherein the protrusion at least partially defines a body cavity, the valve assembly being at least partially disposed in the body cavity, the body cavity opening through the second body end.

67. The cartridge according to claim 66, wherein: The cavity wall of the block at least partially defines the body cavity; and The valve assembly is at least partially disposed within the block and extends into the block through the cavity wall.

68. The cartridge according to claim 67, wherein: The valve body further includes: A first valve hole extending through the cavity wall into the block; and A second valve hole extending through the cavity wall into the block; The valve assembly further includes: A first valve member at least partially disposed within the first valve hole and movable within the first valve hole to block and unblock the flow of the first component material from the first valve hole to the mixing chamber cavity; and A second valve member at least partially disposed within the second valve hole and movable within the second valve hole to block and unblock the flow of the second component material from the second valve hole to the mixing chamber cavity.

69. The barrel according to claim 68, wherein, The first valve hole does not penetrate the opening of the first body end, and the second valve hole does not penetrate the opening of the first body end.

70. The barrel according to any one of claims 68 and 69, wherein, The valve assembly further includes: A coupler that is connected to the first valve member and the second valve member, wherein the valve mount is formed on the coupler.

71. The barrel according to claim 70, wherein, The valve mount is formed around an orifice that passes through the coupler, and the orifice is disposed on the axis.

72. The barrel according to any one of claims 70 and 71, wherein, The first valve member engages the coupler at a first mounting position that is radially offset from the valve mount, and wherein the second valve member engages the coupler at a second mounting position that is radially offset from the valve mount.

73. The barrel according to any one of claims 60 to 72, wherein, The valve mount includes a plurality of valve protrusions that extend radially with respect to the axis.

74. The barrel according to claim 73, wherein, The plurality of valve protrusions extend radially inward.

75. The cartridge according to any one of claims 60 to 74, further comprising: A first cartridge inlet that extends from the valve body and away from the axis, the first cartridge inlet including a first inlet hole configured to receive the first component material into the cartridge; A second cartridge inlet that extends from the valve body and away from the axis, the second cartridge inlet including a second inlet hole configured to receive the second component material into the cartridge.

76. The barrel according to claim 75, wherein, The first cartridge inlet extends from the valve body at a first position between the first body end and the second body end, and wherein the second cartridge inlet extends from the valve body at a second position between the first body end and the second body end.

77. The barrel according to any one of claims 60 to 76, wherein, The mixing chamber cavity does not penetrate the second body end opening.

78. The barrel according to any one of claims 60 to 77, wherein, The valve assembly is configured to allow the flow of compressed gas to the mixing chamber cavity while closing the flow paths of the first component material and the second component material to the mixing chamber cavity, and the valve assembly is configured to block the flow of compressed gas to the mixing chamber cavity while opening the flow paths of the first component material and the second component material to the mixing chamber cavity.

79. A cartridge for a multi-component injector, the multi-component injector having an actuator assembly including a spray gun body and a displacer, the cartridge configured to receive a first component material and a second component material that are mixed to form a multi-component material, the cartridge comprising: A valve body that extends along an axis between a first body end and a second body end, the valve body including: A block; A mixing chamber cavity that extends along the axis into the block in a first axial direction; A first valve hole that extends along the axis into the block in a second axial direction, wherein a first gas chamber and a first flow chamber configured to receive the first component material are disposed within the first valve hole, and wherein the second axial direction is opposite to the first axial direction; A second valve hole that extends into the block in the second axial direction, wherein a second gas chamber and a second flow chamber for receiving the second component material are disposed within the second valve hole; A gas passageway that extends into the block in the second axial direction; and A body mount configured to engage with the spray gun body to secure the valve body to the spray gun body; A valve assembly supported by the valve body, the valve assembly including: A first valve member disposed at least partially within the first valve bore, the first valve member movable relative to the block between a first member first state and a first member second state, in the first member first state, the first gas chamber is in fluid communication with the mixing chamber cavity and the first flow chamber is in fluid communication with the mixing chamber cavity, in the first member second state, the first flow chamber is in fluid communication with the mixing chamber cavity and the first gas chamber is in fluid communication with the mixing chamber cavity; A second valve member disposed at least partially within the second valve bore, the second valve member movable relative to the block between a second member first state and a second member second state, in the second member first state, the second gas chamber is in fluid communication with the mixing chamber cavity and the second flow chamber is in fluid communication with the mixing chamber cavity, in the second member second state, the second flow chamber is in fluid communication with the mixing chamber cavity and the second gas chamber is in fluid communication with the mixing chamber cavity; and A valve mount configured to engage with the displacer to secure the valve assembly to the displacer; Wherein the cartridge can be mounted to the actuator assembly as a single unit and removed from the actuator assembly.

80. The barrel according to claim 79, wherein, The valve assembly further includes: A coupler connected to the first valve member and the second valve member such that displacement of the coupler along the axis causes displacement of the first valve member and the second valve member along the axis; Wherein the valve mount is formed on the coupler.

81. The barrel according to claim 80, wherein, The valve mount is disposed around an aperture extending through the coupler, the aperture being disposed on the axis.

82. The barrel according to any one of claims 79 to 81, wherein, The first valve member is configured to transition from the first member second state to the first member first state in the first axial direction.

83. The barrel according to any one of claims 79 to 82, wherein, A body cavity is formed in the valve body, the body cavity opening through the second body end.

84. The barrel according to claim 83, wherein, The first valve member and the second valve member are each disposed at least partially within the body cavity.

85. The barrel according to any one of claims 79 to 84, wherein, The body mount is formed on the exterior of the valve body at the second body end.

86. The barrel according to any one of claims 79 to 85, wherein, The body mount includes a plurality of cartridge protrusions extending radially.

87. The barrel according to claim 86, wherein, The plurality of cartridge protrusions extend radially outward.

88. The barrel according to any one of claims 79 to 87, wherein, The valve mount includes a plurality of valve protrusions extending radially.

89. The barrel according to claim 88, wherein, The plurality of valve protrusions extend radially inward.

90. The barrel according to any one of claims 79 to 89, wherein, The gas passageway passes through the first body end opening.

91. The barrel according to any one of claims 79 to 89, wherein, The gas passageway does not pass through the first body end opening.

92. The cartridge according to any one of claims 79 to 91, further comprising: A gas rod connected to the block and in fluid communication with the gas passageway.

93. The barrel according to claim 92, wherein, The gas rod extends further in the second axial direction than the valve assembly.

94. The barrel according to any one of claims 92 and 93, wherein, The gas rod extends axially beyond the second body end.

95. The cartridge according to any one of claims 79 to 94, further comprising: A first seal disposed within the first seal bore, the first valve member engaging the first seal to form a first flow valve.

96. The barrel according to claim 95, wherein, The first valve member engages the first seal in both the first state of the first member and the second state of the first member.

97. The barrel according to any one of claims 95 and 96, wherein, The first seal at least partially defines the first flow chamber and at least partially defines the first gas chamber.

98. A multi-component spray gun configured to receive a first component material and a second component material and output a spray of the multi-component material, the multi-component spray gun comprising: An actuator assembly including a spray gun body and a displacer movable relative to the spray gun body along an axis; And A cartridge removably mounted to the actuator assembly by a static interface formed between the cartridge and the spray gun body and a dynamic interface formed between the cartridge and the displacer, the dynamic interface configured to actuate a first flow valve of the cartridge to control the flow of the first component material to a mixing chamber cavity formed in the cartridge, and the dynamic interface configured to actuate a second flow valve of the cartridge to control the flow of the second component material to the mixing chamber cavity; Wherein the cartridge is mountable to and removable from the actuator assembly as a single unit.

99. The multi-component spray gun according to claim 98, further comprising: A handle extending from the spray gun body; And A trigger supported by the spray gun body.

100. The multi-component injector according to any one of claims 98 and 99, wherein, The displacer is formed as a piston.

101. The multi-component injector according to any one of claims 98 to 100, wherein, The cartridge further comprises: A valve body in which the first flow valve and the second flow valve are formed; and A valve assembly supported by the valve body, the valve assembly movable relative to the valve body to actuate the first flow valve and the second flow valve between respective first and second states, in the first state, the flow of the first component material to the mixing chamber cavity and the flow of the second component material to the mixing chamber cavity are blocked, and in the second state, the flow of the first component material to the mixing chamber cavity and the flow of the second component material to the mixing chamber cavity are not blocked; Wherein the static interface is formed between the valve body and the spray gun body; and Wherein the dynamic interface is formed between the valve assembly and the displacer.

102. The multi-component injector according to claim 101, wherein, The static interface is formed between protrusions extending into a receiver.

103. The multi-component injector according to claim 102, wherein, The valve body includes the protrusions and the spray gun body includes the receiver.

104. The multi-component spray gun according to any one of claims 101 to 103, wherein, The displacer extends into the valve assembly to form the dynamic interface.

105. The multi-component injector according to any one of claims 98 to 104, wherein, The static interface and the dynamic interface are formed simultaneously during installation of the cartridge to the actuator assembly.

106. The multi-component injector according to claim 105, wherein, During removal of the cartridge from the actuator assembly, the static interface and the dynamic interface are disconnected simultaneously.

107. The multi-component injector according to claim 101, wherein: The static interface is formed between a body mount of the valve body and a housing mount of the spray gun body; and The dynamic interface is formed between a valve mount of the valve assembly and a drive mount of the displacer.

108. The multi-component injector according to claim 107, wherein, The body mount includes at least one cartridge-shaped protrusion, and the housing mount includes at least one body protrusion, and wherein, in the case where the static interface is formed, the at least one cartridge-shaped protrusion and the at least one body protrusion overlap axially.

109. The multi-component injector according to claim 108, wherein: The at least one cartridge protrusion includes an alignment protrusion having a first circumferential width and a mounting protrusion having a second circumferential width; The at least one body protrusion includes a plurality of body protrusions; The housing mount includes a plurality of body notches scattered between the body protrusions of the plurality of cartridge protrusions; The plurality of body notches include an alignment notch having a third circumferential width and a mounting notch having a fourth circumferential width; and The first circumferential width is different from the second circumferential width, and the third circumferential width is different from the fourth circumferential width.

110. The multi-component injector according to claim 109, wherein, The second circumferential width is greater than the third circumferential width, thereby preventing the mounting protrusion from passing through the alignment notch.

111. The multi-component injector according to any one of claims 107 to 110, wherein, The valve mount includes at least one valve protrusion, and the drive mount includes at least one drive protrusion, and wherein, in the case where the dynamic interface is formed, the at least one valve protrusion and the at least one drive protrusion overlap axially.

112. The multi-component injector according to claim 111, wherein: The drive mount further includes a drive bracket axially spaced from the at least one drive protrusion and a groove axially disposed between the at least one drive protrusion and the drive bracket; and The at least one valve protrusion extends into the groove to be axially supported by the at least one drive protrusion and the drive bracket, wherein the dynamic interface is formed.

113. The multi-component injector according to any one of claims 111 and 112, wherein, The drive mount is formed on a piston shaft of the displacer.

114. The multi-component injector according to any one of claims 98 to 113, wherein, The cartridge is configured to rotate about the axis to form the static interface and the dynamic interface and to disconnect the static interface and the dynamic interface.

115. The multi-component injector according to any one of claims 98 to 114, wherein, A pneumatic connection is formed between the cartridge and the actuator assembly to supply compressed gas to the cartridge.

116. The multi-component injector according to any one of claims 98 to 114, wherein, A first pneumatic connection is formed between the cartridge and the spray gun body to supply a first compressed gas flow to the cartridge, and a second pneumatic connection is formed between the cartridge and the displacer to supply a second compressed gas flow to the cartridge.

117. The multi-component injector according to claim 116, wherein, An air rod extends between the cartridge and the displacer and pneumatically connects the cartridge and the displacer, and the second compressed gas flow flows through the air rod.

118. The multi-component injector according to claim 117, wherein, The air rod is fixed to the cartridge.

119. The multi-component injector according to claim 117, wherein, The air rod is telescopically engaged with one of the cartridge and the displacer.

120. The multi-component injector according to any one of claims 98 to 119, wherein, The first component material and the second component material do not flow within the actuator assembly.

121. The multi-component injector according to any one of claims 98 to 120, wherein, The mixing chamber cavity is open along the axis in a first axial direction and closed along the axis in a second axial direction opposite to the first axial direction.

122. The multi-component injector according to any one of claims 98 to 121, wherein, When the cartridge is disassembled, the flow paths of the first and second component materials are not maintained mounted on or disposed within the actuator assembly.

123. The multi-component injector according to claim 98, wherein, The dynamic interface and the static interface are simultaneously established by a rotational movement of the cartridge relative to the spray gun body in a first rotational direction, and are simultaneously disconnected by a rotational movement of the cartridge relative to the spray gun body in a second rotational direction.

124. The multi-component injector according to any one of claims 98 to 123, further comprising: a manifold configured to be connected to a first supply line supplying the first component material to the manifold and a second supply line supplying the second component material to the manifold; wherein the manifold is mounted to the cartridge to be supported by the cartridge.

125. The multi-component injector according to claim 124, wherein, Fasteners extend through a manifold body of the manifold and into the cartridge to fix the manifold to the cartridge.

126. The multi-component injector according to any one of claims 124 and 125, wherein, The manifold engages with the spray gun body to prevent the cartridge from rotating relative to the spray gun body, wherein the static interface and the dynamic interface are formed and the manifold is mounted to the cartridge.

127. The multi-component injector according to any one of claims 98 to 100 and 123, further comprising: a manifold configured to be connected to a first supply line supplying the first component material to the manifold and a second supply line supplying the second component material to the manifold; wherein the cartridge further comprises: a valve body in which the first flow valve and the second flow valve are formed; and a valve assembly supported by the valve body, the valve assembly being movable relative to the valve body to actuate the first flow valve and the second flow valve between respective first and second states, in the first state, the flow of the first and second component materials to the mixing chamber cavity is blocked, and in the second state, the flow of the first and second component materials to the mixing chamber cavity is not blocked; wherein the valve body is connectable to the spray gun body at the static interface; wherein the valve assembly is connectable to the displacer at the dynamic interface; and wherein the manifold is mounted to the valve body.

128. The multi-component injector according to claim 127, wherein: the cartridge includes a first cartridge inlet protruding from the valve body and a second cartridge inlet protruding from the valve body; and the first cartridge inlet and the second cartridge inlet extend into the manifold, wherein the manifold is mounted to the valve body.

129. The multi-component injector according to claim 128, wherein: when the manifold is mounted to the cartridge, the first cartridge inlet engages and disengages from a first manifold valve of the manifold; and when the manifold is mounted to the cartridge, the second cartridge inlet engages and disengages from a second manifold valve of the manifold.

130. The multi-component injector according to claim 129, wherein, The first manifold valve is not a check valve.

131. The multi-component injector according to any one of claims 128 to 130, wherein, A first inlet valve is disposed within the first cartridge inlet and is configured to prevent backflow from the cartridge to the manifold.

132. The multi-component injector according to any one of claims 98 to 131, wherein, The first component material does not enter the cartridge through the axial end of the cartridge.

133. A cartridge for use with a multi-component spray gun having an actuator assembly including a spray gun body and a displacer, the cartridge configured to receive a first component material and a second component material that are mixed to form a multi-component material, the cartridge comprising: A valve body extending along an axis between a first body end and a second body end; A mixing chamber cavity formed in the valve body and opening through the first body end; A first valve hole formed in the valve body and opening through the second body end; A second valve hole formed in the valve body and opening through the second body end; A valve assembly supported by the valve body, the valve assembly comprising: A first valve member at least partially disposed within the first valve hole; and A second valve member at least partially disposed within the second valve hole; A first flow valve formed within the first valve hole, the first valve member forming a movable valve member of the first flow valve; and A second flow valve formed within the second valve hole, the second valve member forming a movable valve member of the second flow valve; wherein the valve assembly is movable relative to the valve body to actuate the first flow valve and the second flow valve between a respective first state and a respective second state, in the first state, the flow of the first component material to the mixing chamber cavity and the flow of the second component material to the mixing chamber cavity are blocked, and in the second state, the flow of the first component material to the mixing chamber cavity and the flow of the second component material to the mixing chamber cavity are not blocked; and wherein the cartridge is mountable to the actuator assembly as a single unit and removable from the actuator assembly.

134. The barrel according to claim 133, wherein, The valve assembly further comprises: A coupler connected to the first valve member and the second valve member, the coupler configured to transmit a force to the first valve member and the second valve member to move the first valve member and the second valve member relative to the valve body in a first axial direction along the axis and in a second axial direction along the axis relative to the valve body, the first axial direction being opposite to the second axial direction.

135. The barrel according to claim 134, wherein, The mixing chamber cavity opens in the first axial direction.

136. The barrel according to any one of claims 134 and 135, wherein, The first valve member and the second valve member are configured to shift in the first axial direction to move from the respective first state to the respective second state.

137. The barrel according to any one of claims 134 to 136, wherein, The coupler is at least partially disposed within the valve body.

138. The cartridge according to any one of claims 133 to 137, further comprising: A first seal disposed within the first valve hole, the first flow valve being formed between the first valve member and the first seal; And A second seal disposed within the second valve hole, the second flow valve being formed between the second valve member and the second seal.

139. The barrel according to claim 138, wherein, In the case where the first flow valve is in the first state and the first flow valve is in the second state, the first valve member is sealingly engaged with the first seal body.

140. The cartridge according to any one of claims 133 to 139, wherein: The first flow valve blocks the flow of the first component material to the mixing chamber cavity in the first state and allows the first compressed gas to flow to the mixing chamber cavity in the first state; and The first flow valve blocks the flow of the first compressed gas to the mixing chamber cavity in the second state and allows the first component material to flow to the mixing chamber cavity in the second state.

141. The cartridge according to claim 140, wherein: The second flow valve blocks the flow of the second component material to the mixing chamber cavity in the first state and allows the second compressed gas to flow to the mixing chamber cavity in the first state; The second flow valve blocks the flow of the second compressed gas to the mixing chamber cavity in the second state and allows the second component material to flow to the mixing chamber cavity in the second state.

142. The barrel according to any one of claims 133 to 141, wherein, In the case where the first flow valve is in the first state and the first flow valve is in the second state, the first valve member is in contact with the first component material.

143. The barrel according to any one of claims 133 to 142, wherein, In the case where the first flow valve is in the first state and the first flow valve is in the second state, the first valve member is in contact with the compressed gas.

144. The barrel according to any one of claims 133 to 143, wherein, The first valve member is a shuttle, comprising: A flow head; A member body; A flow neck that axially extends between the flow head and the member body and connects the flow head and the member body; A mounting head; and A mounting neck that axially extends between the member body and the mounting head and connects the member body and the mounting head; Wherein, the flow neck is narrower than the flow head; and Wherein, the mounting neck is narrower than the member body and the mounting head.

145. The barrel according to claim 144, wherein, The first valve member further includes a tail that extends from the mounting head on a side of the mounting head opposite to the mounting neck.

146. The cartridge according to claim 133, wherein: The valve assembly includes a coupler; The first valve member is connected to the coupler at a first position radially offset from the axis; The second valve member is connected to the coupler at a second position radially offset from the axis.

147. The barrel according to claim 146, wherein, The first valve member extends completely through the coupler, and the second valve member extends completely through the coupler.

148. The barrel according to any one of claims 146 and 147, wherein, The coupler includes: A first mounting groove formed through the coupler, the first mounting groove including a first receiving orifice and a first retaining groove extending from the first receiving orifice; A second mounting groove formed through the coupler, the second mounting groove including a second receiving orifice and a second retaining groove extending from the first receiving orifice; Wherein, the first valve member is connected to the coupler at the first retaining groove; Wherein, the second valve member is connected to the coupler at the second retaining groove.

149. The barrel according to claim 148, wherein, The first valve member is configured to be installed to the coupler by transferring through the first receiving orifice and then transferring into the first retaining groove.

150. The cartridge according to any one of claims 148 and 149, wherein: The first valve member includes: A first flow head; A first member body; A first flow neck that axially extends between the first flow head and the first member body and connects the first flow head and the first member body; A first mounting head; and A first mounting neck that axially extends between the first member body and the first mounting head and connects the first member body and the first mounting head; The first flow neck is narrower than the first flow head; and The first mounting neck is narrower than the first member body and the first mounting head.

151. The barrel according to claim 150, wherein, The first mounting neck is disposed within the first retaining groove, wherein the first valve member is connected to the coupler, the first member body axially overlaps with the coupler body of the coupler, and the first mounting head axially overlaps with the coupler body.

152. The cartridge according to any one of claims 150 and 151, wherein: The second valve member includes: A second flow head; A second member body; A second flow neck that axially extends between the second flow head and the Second member body and connects the second flow head and the second member body; A second mounting head; and A second mounting neck that axially extends between the second member body and the Second mounting head and connects the second member body and the second mounting head; The second flow neck is narrower than the second flow head; and The second mounting neck is narrower than the second member body and the second mounting head.

153. The barrel according to claim 150, wherein, The second mounting neck is disposed within the second retaining groove, and the second valve member is connected to the coupler, the second member body axially overlaps with the coupler body of the coupler, and the second mounting head axially overlaps with the coupler body.

154. The barrel according to any one of claims 148 to 153, wherein, The coupler further includes: An orifice that passes through and is aligned with the axis; and A plurality of valve protrusions that radially extend inwardly into the orifice.

155. A cartridge for use with a multi-component spray gun having an actuator assembly including a spray gun body and a displacer, the cartridge configured to receive a first component material and a second component material that are mixed to form a multi-component material, the cartridge including: A valve body that extends along an axis between a first body end and a second body end; A mixing chamber cavity formed in the valve body and opening through the first body end; A first valve hole formed in the valve body and opening through the second body end; A second valve hole formed in the valve body and opening through the second body end; And A valve assembly supported by the valve body, the valve assembly including: A coupler disposed at least partially within the valve body; A first valve member connected to the coupler and disposed at least partially within the first valve bore; and A second valve member connected to the coupler and disposed at least partially within the second valve bore; Wherein the coupler is configured to transmit a force to the first valve member to displace the first valve member along the first valve bore between a first member first state and a first member second state, in the first member first state, the flow of the first component material to the mixing chamber cavity is blocked such that the first component material is blocked from flowing into the mixing chamber cavity, and in the first member second state, the flow of the first component material to the mixing chamber cavity is not blocked such that the first component material can flow to the mixing chamber cavity; Wherein the coupler is configured to transmit a force to the second valve member to displace the second valve member along the second valve bore between a second member first state and a second member second state, in the first state, the flow of the second component material to the mixing chamber cavity is blocked such that the second component material is blocked from flowing to the mixing chamber cavity, and in the second member second state, the flow of the second component material to the mixing chamber cavity is not blocked such that the second component material can flow to the mixing chamber cavity; Wherein the cartridge can be mounted to the actuator assembly as a single unit and removed from the actuator assembly such that the valve body and the valve assembly can be mounted together and removed together.

156. The cartridge according to claim 155, wherein: The valve body includes a block, and the first valve bore, the second valve bore, and the mixing chamber are formed in the block; The valve body includes a protrusion extending from the block, and the protrusion and the block at least partially define the body cavity opening through the second body end; and The coupler is disposed at least partially within the body cavity.

157. The barrel according to claim 156, wherein, A body mount is formed on the protrusion, and the body mount is configured to engage with the spray gun body to statically mount the cartridge to the spray gun body.

158. The barrel according to any one of claims 155 to 157, wherein, The first valve member extends completely through the coupler, and the second valve member extends completely through the cartridge.

159. The cartridge according to any one of claims 155 to 158, wherein the first valve member includes: A first flow head; A first member body axially overlapping the coupler body of the coupler; A first flow neck axially extending between the first flow head and the first member body and connecting the first flow head and the first member body; A first mounting head axially overlapping the coupler body; and A first mounting neck axially extending between the first member body and the first mounting head and connecting the first member body and the first mounting head; Wherein the first flow neck is narrower than the first flow head; and Wherein the first mounting neck is narrower than the first member body and the first mounting head.

160. The barrel according to claim 159, wherein when the first valve member is in the first state of the first member, the first flow head is sealed within the first valve hole to block the flow of the first component material towards the mixing chamber cavity.

161. The barrel according to any one of claims 155 to 160, wherein the first flow path of the first component material does not extend through the second body end, and wherein the second flow path of the second component material does not extend through the second body end.

162. The barrel according to any one of claims 155 to 161, wherein the valve body is configured such that the first component material enters the valve body at a first position between the first body end and the second body end, and wherein the valve body is configured such that the second component material enters the valve body at a second position between the first body end and the second body end.

163. The barrel according to any one of claims 155 to 162, wherein, A valve mount is formed on the coupler, and the valve mount is configured to dynamically engage with the displacer to receive a mechanical drive input from the displacer.

164. A multi-component injector configured to receive a first component material and a second component material and eject a spray of a multi-component material formed by combining the first component material and the second component material, the multi-component injector comprising: A gun body; A displacer at least partially disposed within the gun body; A mixing chamber configured to receive the first component material and the second component material and eject the multi-component material; A barrel that can be mounted as a single unit to and disassembled from the gun body and the displacer, the barrel comprising: A valve body extending along an axis between a first body end and a second body end; A mixing chamber cavity formed in the valve body and opening through the first body end, with the mixing chamber at least partially disposed within the mixing chamber cavity; A first valve hole formed in the valve body and opening through the second body end; A second valve hole formed in the valve body and opening through the second body end; and A valve assembly supported by the valve body, the valve assembly comprising: A first valve member at least partially disposed within the first valve hole; and A second valve member at least partially disposed within the second valve hole; wherein the first valve member is movable relative to the first valve hole between a first state of the first member and a second state of the first member, in the first state of the first member, the flow of the first component material towards the mixing chamber cavity is blocked such that the first component material is prevented from flowing towards the mixing chamber cavity, and in the second state of the first member, the flow of the first component material towards the mixing chamber cavity is not blocked such that the first component material can flow towards the mixing chamber cavity; and Wherein, the second valve member is movable relative to the second valve orifice between a first state of the second member and a second state of the second member. In the first state of the second member, the flow of the second component material to the mixing chamber cavity is blocked, such that the second component material is prevented from flowing to the mixing chamber cavity. In the second state of the second member, the flow of the second component material to the mixing chamber cavity is not blocked, such that the second component material can flow to the mixing chamber cavity.

165. The multi-component injector according to claim 164, further comprising: A coupler connected to the first valve member, the second valve member, and the displacer, the coupler configured to receive a mechanical drive input from the displacer and transmit mechanical force to the first valve member and the second valve member to displace the first valve member relative to the first valve orifice and displace the second valve member relative to the second valve orifice.

166. The multi-component injector according to claim 165, wherein, The coupler is configured to be mounted to the displacer during installation of the cartridge, and the coupler is configured to be detached from the displacer during removal of the cartridge.

167. The multi-component injector according to any one of claims 164 to 166, wherein, The first valve member includes: A first flow head disposed within the first valve orifice; A first member body; A first flow neck that axially extends between the first flow head and the first member body and connects the first flow head and the first member body; A first mounting head; and A first mounting neck that axially extends between the first member body and the first mounting head and connects the first member body and the first mounting head; Wherein, the first flow neck is narrower than the first flow head; and Wherein, the first mounting neck is narrower than the first member body and the first mounting head.

168. A multi-component injector configured to receive a first component material and a second component material and eject a spray of a multi-component material formed by the combination of the first component material and the second component material, the multi-component injector comprising: A spray gun body; A displacer at least partially disposed within the spray gun body; A mixing chamber configured to receive the first component material and the second component material and eject the multi-component material; A first flow valve configured to control the flow of the first component material to the mixing chamber; A second flow valve configured to control the flow of the second component material to the mixing chamber; And A cutoff member supported by the spray gun body and connected to the first flow valve and the second flow valve cutoff member, the cutoff member configured to actuate the first flow valve to cutoff the flow of the first component material to the mixing chamber and configured to actuate the second flow valve to cutoff the flow of the second component material to the mixing chamber.

169. The multi-component injector according to claim 168, wherein, The cutoff member is configured to axially move the first valve member of the first flow valve away from the ejection orifice of the mixing chamber to cutoff the flow of the first component material. The multi-component injector according to any one of claims 168 and 169, wherein, The cutoff member includes a converter configured to convert a rotational input of the converter into a linear output to actuate the first flow valve and the second flow valve.

171. The multi-component injector according to claim 170, wherein, The converter includes: A converter body configured to receive a rotational input and rotate about an axis; A locator engages a slot formed in the converter body such that rotation of the converter body displaces the locator from a first end of the slot to a second end of the slot and axially moves along the axis.

172. The multi-component injector according to claim 171, wherein, The slot extends axially and circumferentially.

173. The multi-component injector according to any one of claims 171 and 172, wherein, The slot includes a first slot and a second slot, wherein a first end of the locator is disposed in the first slot, and wherein a second end of the locator is disposed in the second slot. The multi-component injector according to any one of claims 171 to 173, wherein The shut-off member further includes: A connector mounted to the displacer, wherein the locator extends radially outward from the connector.

175. The multi-component injector according to claim 174, wherein, The connector includes a connector head at least partially disposed within a piston head of the displacer, the connector includes a connector shaft extending from the connector head and away from the mixing chamber, and the locator extends from the connector shaft.

176. The multi-component injector according to any one of claims 174 and 175, wherein, The locator extends through the connector.

177. The multi-component injector according to any one of claims 168 to 176, wherein, The shut-off member includes a knob that can be contacted from the outside of the spray gun body, and the knob forms an input of the shut-off member. The multi-component injector according to any one of claims 168 to 177, wherein The shut-off member can be actuated between an unlocked state and a locked state. In the unlocked state, a first flow valve and a second flow valve can be actuated to corresponding open states to allow a first component material and a second component material to flow to the mixing chamber. In the locked state, the shut-off member prevents the first flow valve and the second flow valve from being actuated to the corresponding open states. The multi-component injector according to any one of claims 168 to 177, wherein, The shut-off member can be actuated between an unlocked state and a locked state. In the unlocked state, the multi-component injector can be transferred between a non-injection state and an injection state. In the locked state, the multi-component spray gun is locked in the non-injection state.

180. The multi-component spray gun according to any one of claims 168 to 179, wherein, A first flow valve and a second flow valve are disposed within a cartridge, and the cartridge can be mounted to the spray gun body at a static interface and can be mounted to the displacer at a dynamic interface.

181. The multi-component spray gun according to claim 180, wherein, The first component material and the second component material do not flow within the spray gun body.

182. A multi-component injector configured to receive a first component material and a second component material and eject a spray of a multi-component material formed by combining the first component material and the second component material, the multi-component injector comprising: A spray gun body; A displacer at least partially disposed within the spray gun body; A mixing chamber configured to receive the first component material and the second component material and eject the multi-component material, the mixing chamber being configured to eject the multi-component material in a first axial direction along an ejection axis from an ejection port; A valve assembly configured to control the flow of the first component material to the mixing chamber and control the flow of the second component material to the mixing chamber, the valve assembly being connected to the displacer to be actuated along the ejection axis; And A shut-off member connected to the valve assembly and configured to actuate the valve assembly in a second axial direction opposite to the first axial direction along the ejection axis to cut off the flow of the first component material and the flow of the second component material to the mixing chamber.

183. The multi-component injector according to claim 182, wherein, The shut-off includes: A knob that can be contacted from the outside of the spray gun body, the knob being configured to rotate; A converter connected to the knob and the valve assembly, the converter configured to convert a rotational input from the knob into a linear motion of the valve assembly to actuate the valve assembly in the second axial direction.

184. The multi-component injector according to claim 183, wherein, The converter includes a converter body connected to the knob to be rotated by the knob.

185. The multi-component injector according to claim 184, wherein, The converter body is at least partially disposed within the knob.

186. The multi-component injector according to claim 185, wherein, The converter body includes at least one external plane, and the knob includes at least one knob plane, the knob plane engaging the at least one external plane to prevent rotation of the converter body relative to the knob.

187. The multi-component injector according to any one of claims 184 to 186, wherein, At least one slot is formed in the converter body, the at least one slot extending helically about the injection axis.

188. The multi-component injector according to claim 187, wherein, The at least one slot does not completely extend around the injection axis.

189. The multi-component injector according to any one of claims 187 and 188, wherein, The at least one slot includes a free end and a locking end, wherein a pawl is formed at the locking end. The multi-component injector according to any one of claims 184 to 189, wherein The converter further includes: A locator engaged with the converter body, wherein rotation of the converter body is configured to axially displace the locator relative to the injection axis.

191. The multi-component injector according to any one of claims 184 to 190, further comprising: A connector extending between and connecting the displacer and the converter.

192. The multi-component injector according to any one of claims 183 to 191, wherein the shut-off member further includes: A spring disposed between the knob and the spray gun body, the spring biasing the knob in the second axial direction.

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