Patent ID: 7628148

Claim:
A paint ball gun comprising: a handle connected with a main body which includes an air tube connected with the handle and a shoot tube located parallel to the air tube, a communication hole defined in communication between the shoot tube and the air tube, a hopper connected to the shoot tube and being adapted to feed paint balls in the shoot tube, a push member movably located in the shoot tube, a strike rod movably received in a rear end of the air tube and connected with the push member, a first chamber defined in a front end of the air tube and pressurized air being provided into the first chamber from a pressurized source, and a valve located in the air tube and including a first member and a second member which is threadedly connected to an end of the first member, a piston rod movably extending through the valve, the first member including a space defined therein and a shoulder extending radially and inward from an inner periphery of the first member, an aperture defined through a wall of the first member and being in communication between the shoot tube and the space, two ends of the piston rod extending out from the first and second members respectively, a piston head connected to an end of the piston rod and removably contacting an end of the first member so as to seal the space, the other end of the piston rod extending out from the second member and facing the strike rod, a flange extending radially outward from the piston rod and located between the shoulder and an inner end of the second member, a second chamber defined between the flange and the inner end of the second member, a path defined axially in the piston rod and communicating with the piston head so as to introduce pressurized air from the first chamber into the second chamber, the flange being stopped by the shoulder of the first member; wherein the second member includes a plurality of radial holes defined through a wall thereof and communicating with grooves defined axially in an outer periphery of the second member.