Patent ID: 6382073
Filing Date: 2002-05-07
Classification: F41A

Abstract:
Gas operated shotgun including a barrel (11) with an interior, a cylinder (12) attached to said barrel and having an internal chamber, a piston (13) moving in said chamber of the cylinder between a forward rest position and an active retracted control position for certain functional operations of the shotgun, where the inside of the barrel communicates with the internal chamber of the cylinder through at least one passageway (14) of a part of the propulsion gasses formed from a cartridge being fired from said barrel in said cylinder due to the movement of the piston from the forward rest position to the active retracted position, where the piston is guided centrally by an interposed seal bushing (15), on a stationary guide rod (16) coaxial to the cylinder and where said guide rod carries a stem (19) with an excess pressure valve (18) positioned to close the cylinder (12) on the opposite side to the one the piston is travelling towards during its active retracting stroke, characterised by a protective flap (20) which extends into the cylinder chamber towards the piston on the front of the same, which is placed in front of the gas entrance hole (14) in said cylinder chamber and which partially covers the guide rod (16) of the piston.