Patent ID: 7213589

Claim:
Compressed-gas gun ( 1 ) that utilizes the action of an expanding compressed gas ( 20 ) to fire one of the group consisting of solid projectile bodies ( 3 ), hollow projectile bodies ( 3 ), and projectile bodies ( 3 ) attached to an accessory device, which compressed-gas gun ( 1 ) comprises a gun barrel ( 2 ) for receiving and accelerating the projectile body ( 3 ) and a compressed gas casing ( 5 ), which is connected with the gun barrel ( 2 ) and divided by a partition ( 10 ) into a compressed-gas chamber ( 11 ) and a working chamber ( 12 ), wherein a working piston ( 7 ) installed in the working chamber ( 12 ) as a movable rearward termination of the working chamber ( 12 ) has a piston rod ( 6 ), which is guided through the partition ( 10 ), and the front end of the piston rod ( 6 ) has a valve plate ( 8 ) forming a movable rear closure of the gun barrel ( 2 ), wherein (a) only the working piston ( 7 ), which can be moved as far as a rear wall ( 17 ) of the compressed gas casing ( 5 ), is located inside the working chamber ( 12 ), and the piston rod ( 6 ) of the working piston ( 7 ) is supported in the compressed gas chamber ( 11 ) on the partition ( 10 ) with a spring element ( 9 ), and (b) the compressed gas chamber ( 11 ) has an intake valve ( 14 ), which is designed as a check valve, for supplying compressed gas and is connected with the working chamber ( 12 ) by a control valve ( 15 ).