FR2885211A1 - Gas storage device for semi-automatic firearm, has push button storing gas by closing centre punch of relay capacitor, and return spring emptying capacitor when sniper does not activate button and gas pushing piston acting on cylinder head - Google Patents

Abstract

The device has a relay capacitor (1) connected to an orifice (10) below a barrel (9) through a tube (2). The capacitor is filled with gas under pressure using an inlet valve (3) and blocks the gas under depression induced by an outlet of a missile of the barrel. The capacitor has, in outlet, a centre punch (4) which is activated manually by a push button (5) which stores the gas by closing the punch. A return spring empties the capacitor by opening the punch when a sniper does not activate the button and the gas pushes a piston (8) which acts on a cylinder head (7).

Description

-1-DESCRIPTION

  The present invention relates to a device for storing part of the gases from the combustion of the powder when fired with a semiautomatic weapon. Currently the borrowing of gas is used to act immediately on a piston (8) which pushes back the breech (7) of the weapon allowing: - the extraction and ejection of the empty socket, the replenishment of a new ammunition in the chamber by the movement (this time on the front) of the cylinder head (7) repelled by a spring (the evacuated gases no longer acting on the piston (8)). The problem is that all these mechanical movements are detrimental to the accuracy of the weapon since they begin before the projectile leaves the barrel (9); it is for this reason that snipers primarily use manual repetition weapons.

  The device according to the invention overcomes this disadvantage.

  FIG. 1 shows an exemplary embodiment of the invention by way of non-limiting example. It comprises in fact a first characteristic: a relay capacitance (1) connected to the barrel (9) by a tube (2). This relay capacity (1) fills with gas pressure by means of an inlet valve (3) (inlet port).

  The second characteristic is a push button system (5) connected to a needle (4) (manually actuated by the shooter) which makes it possible to keep the relay capacitor (1) closed at its output towards the piston (8).

  Operation: the shooter presses the push button (5) and fires; a part of the gases pushing the projectile through the barrel (9) will enter the relay capacity (1) via the barrel orifice (10), the tube (2) and the valve (3). These high-pressure gases remain stored by the combined actions of the valve (3) and the needle (4) connected to the pushbutton (5).

  The shooter's stroke may immediately stop pressing the pushbutton (5), which will empty the relay capacity (1) and return the pushbutton (5) to its original position by the pushbutton (5). action of a spring (6).

  The piston (8) and the cylinder head (7) are actuated; the semiautomatic operation of the weapon can resume: extraction, ejection, replenishment and striker reset. The shooter can fire again.

  NB: if the shooter does not use the push button (5) the weapon remains in normal operation: the gases only go through the relay capacity (1) to activate the piston (8) immediately.

  (case of a desire to quickly fire several ammunition semiautomatic mode) NB: a variant of the system is to postpone the action of the pushbutton (5) directly on the piston (8) by means of a pin (11). ) which blocks the latter; preventing it from falling back under the action of the gases retained in the relay capacity (1). The needle (4) is the only element that disappears in this variant of the system.

Claims (1)

-2-.REVENDICATIONS   1_Dispositif for storing part of the gases resulting from the combustion of the powder in a semi-automatic weapon characterized in that it comprises: a relay capacitor (1) connected by a tube (2) to an orifice (10) located under the gun (9) and equipped with a valve (3) passing high pressure gas at its inlet when the shot is launched, the relay capacity (1) being equipped at the output of a needle (4) actuated manually by the shooter by means of a push-button (5).   2_Dispositif according to claim 1 characterized in that the pushbutton (5) blocks by its action the gases in the relay capacity (1), they closing by their high pressure the valve (3) when the pressure in the barrel (9) decreases (projectile out of the barrel (9)).   3_Dispositif according to claim 1 or claim 2 characterized in that a spring (6) resets the push button (5) to its original position when the shooter stops pressing the push button (5). 4_Device according to any one of the preceding claims characterized in that the release of the pushbutton (5) empty the relay capacity (1) of the high-pressure gas that it contains having the effect of pushing the piston (8) to the 'back; the piston (8) then driving the cylinder head (7) to find a semi-automatic operation of the weapon: ejection of the case (sleeve) empty then supplying a new cartridge.