Pneumatic gun

An improved gas powered gun comprising:

• a frame;
• a barrel mounted forward on the frame;
• projectile feed means mounted to the frame for providing a projectile to the gun;
• projectile feed sealing means for substantially preventing loss of gas through the projectile feed means;
• a compressed gas reservoir;
• a striker chamber;
• a primary valve assembly for releasing gas from the compressed gas reservoir to expel a projectile from the gun and to charge the striker chamber;
• a striker, slidable within the striker chamber between a cocked and a position of impact on the primary valve assembly which impact actuates the primary valve assembly;
• the striker effectively sealing the striker chamber when the striker is near the primary valve assembly;
• an exhaust port on the striker chamber for exhausting gas from the striker chamber when the striker is effectively at the cocked position;
• bias means for urging the striker from the cocked position to the position of impact on the primary valve assembly;
• trigger means;
• a sear in the trigger means for releasably restraining the striker in the cocked position;
• means for manually moving the striker to the cocked position;
• wherein the improvement comprises:
• valved porting means for exhausting gas from the striker chamber to a region outside of the striker chamber which is open when the striker is moving toward the position of impact on the main valve, and which is closed when compressed gas in the striker chamber is urging the striker from the position of impact on the main valve to the cocked position.

An improved gas powered gun comprising:

• a frame;
• a barrel mounted forward on the frame;
• a projectile feed means mounted to the frame for providing a projectile to the gun;
• bolt means for substantially sealing the projectile feed means against loss of gas;
• a compressed gas reservoir;
• a primary valve assembly adjacent the compressed gas reservoir for releasing gas from the compressed gas reservoir;
• a striker chamber;
• a striker, slidable within the striker chamber between a cocked position and a position of impact on the primary valve assembly which impact actuates the primary valve assembly;
• the striker effectively sealing the striker chamber when near the primary valve assembly;
• bias means for urging the striker from the cocked position to the position of impact on the primary valve assembly;
• an exhaust port on the striker chamber for exhausting gas from the striker chamber when the striker is effectively at the cocked position;
• trigger means;
• a sear in the trigger means for releasably restraining the striker in the cocked position;
• means for manually moving the striker to the cocked position;
• the primary valve assembly further comprising a main poppet valve, and a valve body having a first valve body hole and a second valve body hole;
• the first valve body hole having a reservoir end in fluid communication with the compressed gas reservoir and a striker chamber end in fluid communication with the striker chamber;
• the valve body forming a main valve seat around the reservoir end of the first valve body hole;
• the second valve body hole having a first hole end open to provide gas for expelling a projectile from the gun and a second hole end closed to the passage of gas, and forming a valve hole intersection with the first body hole;
• the main poppet valve having a main poppet valve head in a usual main poppet valve position sealingly engaged with the main valve seat for controlling the release of gas from the reservoir, and an elongated main valve pin smaller than and axially translatable in the first valve body hole having a first valve pin end secured to the main poppet valve head and a second valve pin end in a usual main poppet valve position extending into the striker chamber to the position of impact by the striker, upon which the striker impacts causing the main valve pin to move away from the striker chamber and the main poppet valve to briefly open;
• means urging the main poppet valve to close, returning the main poppet valve to the usual main poppet valve position;
• wherein the improvement comprises:
• a unidirectional secondary valve further comprising:
• a secondary valve element on the main valve pin intermediate the valve hole intersection and the second end of the valve pin, and extending outward in the first valve body hole from the main valve pin effectively to the valve body, such that when the main valve pin moves away from the striker chamber by impact from the striker assembly the secondary valve element moves into the valve hole intersection, opening the secondary valve, and when the main valve pin is in the usual main valve pin position the secondary valve element is within the valve hole substantially closing the secondary valve.