Patent ID: 7540280
Filing Date: 2009-06-02
Classification: F41B

Abstract:
1. A bullet cartridge for toy air gun comprising an air chamber transversely disposed near a top side thereof, an annular stop flange disposed inside said air chamber and dividing said air chamber into a front chamber and a rear chamber, a jet nozzle perpendicularly extending from said front chamber for guiding out a compressed gas to fire a bullet, a metal bush mounted with a gasket member and stopped at said annular stop flange inside the rear chamber, said gasket member having a front wall stopped against said annular stop flange, a screw cap fastened to a rear end of said rear chamber remote from said front chamber, said screw cap having a center through hole, a piston rod inserted through said metal bush and a center through hole of said gasket member and the center through hole of said screw cap, said piston rod having a front stop flange suspending in said front chamber for stopping said front wall of said gasket member to seal the center through hole of said gasket member and a collar extending around the periphery and suspending in said rear chamber, a compression spring sleeved onto said piston rod and stopped between said collar of said piston rod and said metal bush to force said metal bush and said gasket member against said annular stop flange and to support said piston rod in the position where the front stop flange of said piston rod is stopped at the front wall of said gasket member to seal the center through hole of said gasket member and to isolate said front chamber from said rear chamber, and an air inlet passage for guiding a compressed gas from a CO 2 steel cylinder into said rear chamber.