Patent ID: 6561176
Filing Date: 2003-05-13
Classification: F41B

Abstract:
A gas-powered gun comprising:a gun body with a bolt chamber opening forward of the gun body through which a projectile in the bolt chamber may be expelled, a hammer chamber and an air chamber with an air passage between the air chamber and the bolt chamber, a hammer reciprocating in the hammer chamber between a cocked position and a firing position, a spring urging the hammer from the cocked position to the firing position, a trigger plate including a trigger, a sear engaging the trigger and releasably restraining the hammer in the cocked position against spring bias such that the hammer is released when the trigger is pulled, an exhaust valve pin with cup seal in the hammer chamber closing the air chamber to the bolt chamber until the exhaust valve pin is struck by the hammer moving the exhaust valve pin to an open position establishing fluid communication between the air chamber and the bolt chamber, a projectile magazine mounted to the gun body adapted to feed a projectile into the bolt chamber, a bolt between the air passage reciprocating in the bolt chamber in concert with the hammer in the hammer chamber between said cocked position rearward in the bolt chamber, wherein the bolt seals the air passage and opens the projectile magazine to accept said projectile into the bolt chamber forward of the bolt, to a firing position forward in the bolt chamber, wherein the bolt seals the projectile magazine from the bolt chamber, the bolt having an air channel aligning with the air passage with the bolt in said firing position and exhausting forward from the bolt into the bolt chamber expelling a projectile in the bolt chamber forward of the bolt from the gun body under pressure of compressed gas from the compressed gas bottle and stored in the air chamber, past the cup seal and through the air passage and through the bolt air channel, a three way valve having a first position and a second recocking position, a ram assembly including a ram moving rearward under compressed air pressure received through the three valve, the ram pushing the bolt, and the hammer mechanically linked thereto, rearward to said cocked position past the sear, which sear holds the hammer and thus also the bolt in cocked position until released by the trigger, a receptacle on the gun body to which a gas bottle regulator and compressed gas bottle may be attached, the valve connectable to the compressed gas bottle through the gas bottle regulator, the receptacle directing compressed air from the bottle to the air chamber and also to the valve in regulated fluid communication with the ram assembly for recocking the hammer, a coupler controlling effective three way valve position in directing compressed air during recocking and firing, a timing plate aligned in connection between the trigger plate and the coupler such that pulling the trigger moves the trigger plate, timing plate and coupler in a line rearward first releasing the sear to fire the gun and then moving the three way valve to its recocking position, directing compressed air to the ram assembly to recock the hammer, the trigger then returning upon release to its unpulled position under spring bias, the timing plate, trigger plate and coupler moving together in alignment.