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US 5,177,320 AGranted
Staged gas system
OwnerGeorge L. Reynoldsinventor
Life of this patent
Estimating the term…
Abstract
As the primary mass is driven by gas trapped from the barrel of a weapon being fired, it unlocks the bolt and carries it rearward to start the cycling action to operate the weapon. Until the bolt is unlocked a smaller area of the primary mass is exposed to the gases and a larger area is used after the unlocking and the secondary mass is contacted.
Claims3
A stage gas system for cycling a weapon comprising:
- a weapon having a barrel through which a projectile may be fired,
- said weapon having a gas cylinder with a piston therein and a bolt lockable forwardly,
- port means between said barrel and said gas cylinder to conduct gases thereto when said weapon is fired.
- closure means for trapping said gases within said gas cylinder to prevent reverse gas flow when gas pressure in said barrel has diminished,
- said gases in said cylinder moving said piston rearwardly to unlock said bolt to permit rearward movement of said piston and said bolt,
- said piston having a second area of exposure to said gases after unlocking said bolt to create a different force to operate cycling functions of said weapon,
- said piston having a hollow bore to receive a greater volume of gases than a piston without said bore to supply a relatively greater initial force on said piston to accommodate a high cyclic rate weapon, and
- a second piston having a reduced frontal area exposed to said gases followed by an enlarged total frontal area of said second piston being exposed to said gases.
5 more elements
A staged gas system for cycling a weapon comprising:
- a weapon having a barrel through which a projectile may be fired,
- said weapon having a gas cylinder with a piston therein and a bolt lockable forwardly,
- port means between said barrel and said gas cylinder to conduct gases thereto when said weapon is fired,
- closure means for trapping said gases within said gas cylinder to prevent reverse gas flow when gas pressure in said barrel is diminished,
- said gases in said cylinder moving said piston rearwardly to unlock said bolt to permit rearward movement of said piston and said bolt,
- said piston having a second area of exposure to said gases after unlocking said bolt to create a different force to operate cycling functions of said weapon,
- said piston having a bore therein terminating in a closed end and an end with a reduced opening,
- said gas cylinder having a plug fitting into said opening when said weapon is in battery position,
- said piston being movable to remove said end with reduced opening from said plug.
6 more elements
A staged gas system for cycling a weapon comprising,
- a weapon having a barrel through which a projectile may be fired,
- said weapon having a gas cylinder with a piston therein and a bolt lockable forwardly,
- port means between said barrel and said gas cylinder to conduct gases thereto when said weapon is fired,
- closure means for trapping said gases within said gas cylinder to prevent reverse gas flow when gas pressure in said barrel has diminished,
- said gases in said cylinder moving said piston rearwardly to unlock said bolt to permit rearward movement of said piston and said bolt,
- said piston having a second area of exposure to said gases after unlocking said bolt to create a different force to operate cycling functions of said weapon,
- said piston havinng a smaller diameter end engagable with a recess in said gas cylinder when in battery position,
- said smaler diameter being exposed to said gas pressure when said piston moves from battery position.
5 more elements
Dependencies are inferred from the claim text.