Patent ID: 6832605
Filing Date: 2004-12-21
Classification: F41A,F41B

Abstract:
A hammer assembly for use in a pneumatic gun, said pneumatic gun for firing projectiles by use of compressed gas as a propellant, said pneumatic gun comprising:(1) a recock chamber, and (2) a valve, said valve normally closed and impact openable, said valve comprising a valve seat; said hammer assembly comprising:(a) an impacter, said impacter slidably translatable within said recock chamber between a cocked position and a valve-opening position, said valve-opening position closer than said cocked position to said valve seat, said impacter biased toward said valve-opening position, said impacter comprising: (i) an impacter body portion; (ii) an impact imparting face, said valve receptive to an impact by said impact imparting face when said impacter moves to said valve-opening position, so that momentum is provided to said valve by said impacter to open said valve; and (iii) an impacter contact face; (b) a recock piston, said recock piston slidably translatable within said recock chamber between a piston ready-to-fire position and an impacter-cocking position, said piston ready-to-fire position closer than said impacter-cocking position to said valve seat, said recock piston directly or indirectly biased toward said piston ready-to-fire position, said recock piston comprising: (i) a pressure receiving face, said pressure receiving face slidable within said recock chamber; and (ii) a longitudinal passageway, said longitudinal passageway penetrating (A) said recock piston and (B) said pressure receiving face, to define in said pressure receiving face a transfer portal; said transfer portal disposed between said impacter body portion and said valve seat, so that the momentum provided by said impacter to open said valve passes through said transfer portal; said impacter contact face directly or indirectly engageable by said recock piston, wherein as said recock piston moves from said piston ready-to-fire position to said impacter-cocking position, said impacter moves from said valve opening position to said cocked position, and wherein said recock piston returns to said piston ready-to-fire position independently of said impacter; whereby said impacter and said recock piston separately provide a valve opening function and a recock function, respectively, for said pneumatic gun.