Mechanically-actuated trigger assembly and pneumatic valve for pneumatic gun
A trigger assembly and mechanically-actuated pneumatic valve provide improved feel and performance for a pneumatic gun. The trigger assembly can include a trigger having a cam-shaped contact surface. A separate actuator can be arranged between the trigger and a valve actuator. The contact surface of the trigger contacts the actuator to cause a contact surface of the actuator to actuate the valve actuator. Roller bearing contact surfaces can be provided on one or both ends of the actuator to reduce friction between the contact surfaces. The valve actuator may control a face seal, pin valve, and plug member to control distribution of gas within the valve. The face seal and pin valve members can redundantly seal an exhaust port. The plug member can seal off an input port during a firing operation of the pneumatic gun to improve gas efficiency.
1. A trigger assembly and mechanical pneumatic valve for a pneumatic gun, comprising:
a trigger pivotably arranged in a pneumatic gun, said trigger having a contact surface;
an actuator pivotably arranged in the pneumatic gun, said actuator having a first end configured to be contacted by the contact surface of the trigger and a second end configured to contact a valve actuator to initiate a firing operation of the pneumatic gun in response to a trigger pull;
a valve body comprising a plurality of ports for communicating compressed gas, said plurality of ports comprising an input port, a first output port, and a second output port;
a first sealing member surrounding the input port and a second sealing member surrounding the second output port;
a face seal member configured to abut against an outside contact surface of the second sealing member and seal the second output port when the mechanical pneumatic valve is in a non-actuated state;
a pin valve member configured to seal against an inside contact surface of the second sealing member and provide a redundant seal of the second output port when the mechanical pneumatic valve is in the non-actuated state; and
a plug member configured to seal against an inside surface of the first sealing member and close the input port when the mechanical pneumatic valve is in an actuated state,
wherein the valve actuator is configured to move the face seal member, pin valve member, and plug member.
2. A trigger assembly and mechanical pneumatic valve according to claim 1 , wherein the contact surface of the trigger comprises a cam-shaped surface to multiply a force exerted by the trigger on the actuator and reduce a force required to be exerted on the trigger to actuate the valve actuator.
3. A trigger assembly and mechanical pneumatic valve according to claim 1 , wherein the actuator comprises a roller bearing contact surface arranged on a first end of the actuator to be contacted by the contact surface of the trigger.
4. A trigger assembly and mechanical pneumatic valve according to claim 1 , wherein the actuator comprises a roller bearing contact surface arranged on a second end of the actuator to contact the valve actuator.
5. A trigger assembly and mechanical pneumatic valve according to claim 1 , wherein the face seal, pin valve, and plug members are all integrally formed on the valve actuator, wherein the valve actuator is configured to move the face seal away from the second sealing member and to move the pin valve member to a position where a recessed area of the pin valve member aligns with the second sealing member to exhaust compressed gas through the second output port, and wherein the valve actuator is further configured to move the plug member into a sealing position within the first sealing member to block the entry of compressed gas through the input port.
6. A trigger assembly and mechanical pneumatic valve according to claim 1 , wherein the plurality of ports are configured for delivery of compressed gas into the valve, out of the valve, and between valve components, and wherein:
the input port is configured to deliver compressed gas from the compressed gas source into a valve chamber;
the first output port is configured to communicate compressed gas between the valve chamber and a pneumatic assembly of the pneumatic gun; and
the second output port is configured to release compressed gas from the valve to atmosphere, either directly or through a separate exhaust port.
7. A trigger assembly and mechanical pneumatic valve according to claim 1 , wherein the valve actuator is permitted to travel an additional distance beyond an initial point where the pin valve opens, such that the firing operation occurs at an intermediate time during the trigger pull to improve accuracy and feel during the firing operation.
8. A trigger assembly and mechanical pneumatic valve according to claim 1 , wherein the actuator further includes a return mechanism to urge the actuator from the firing position back to a ready position when the trigger is released.
9. A trigger assembly and mechanical pneumatic valve according to claim 1 , wherein the pin valve member comprises two reduced diameter sections, wherein a first reduced diameter section is configured to release compressed gas through the second output port past the second sealing member, and wherein a second reduced diameter section is configured to release compressed gas through an exhaust port past a third sealing member, when the valve is in an actuated position.
10. A trigger assembly and mechanical pneumatic valve according to claim 1 , wherein the valve further comprises a chamber insert arranged within the valve chamber to hold the first sealing member in place within the input port.