FR2761764A1 - Lightweight hand gun, especially a revolver - Google Patents

Abstract

The gun, incorporating a cylinder (1) and a barrel (7), has each of its cylinder chambers fitted with a sealing bush (2) which is able to move axially into the barrel under the effect of the bullet and/or gases to create a seal between the cylinder and barrel. The rear end of the bush has a shoulder for a return spring (5), and its inner surface, which forms a part of the duct through which the bullet travels, has a series of blind holes (3) with axes at 0 - 90 degrees to the axis of the barrel and the direction of the bullet's movement in order to enhance the forward motion of the seal. In addition, the end of the barrel on the cylinder side has a recess to receive the end of the bush as it moves forward, creating a labyrinth seal.

Description

The invention relates to light armament and very particularly the revolver and a gas sealing system placed between the barrel and the barrel.

Until today, only this type of weapon has been made with ever more precise machining of the parts so as to minimize the space separating the barrel from the barrel and therefore the gas leak. We can then see that nothing has been done to completely eliminate this escape of gases, a phenomenon constituting a loss of free energy, a danger for the shooter or at least an annoyance due to a lateral release of noise, splinters , heat and light (at night).

However, it is possible to face this problem by designing a ring-shaped seal which makes the weapon perfectly watertight laterally.

Firstly, it is important to note that the barrel chamber where the cartridge is housed remains blank to allow the ball complete freedom of movement.

The ring is placed logically at the end of the barrel close to the barrel and its internal bore represents part of this tunnel which is the chamber where the bullet passes and where the pressures of the gases are exerted.

In addition, inside this joint is placed several blind holes having a depth obviously less than the thickness of the latter and being installed on 3600. The axes of their bodies are between 0 "and 90 relative to the axis of the barrel and are directed in the direction of movement of the projectile so as to ideally capture the gases which rush into it after the passage of the warhead and will, therefore, push the seal towards the barrel which is arranged for the receive: a shoulder having the thickness of the ring and the depth necessary to constitute a labyrinth type seal.

Finally, this seal which has only room to move in the axis of the barrel, must return to its initial position so as not to hinder the rotation of the barrel. For this, a return spring whose body has a diameter slightly greater than that of the seal, is placed around the latter and is blocked on its rear part which is in the form of a bead and the front part of the barrel where a shoulder is formed. planned for that: these two parts also aim to make the joint slide perfectly in the axis of the barrel.

Consequently, the spring, whose resistance is lower than the forces created by the thrust of the gases, is compressed by the latter using the seal and when the warhead comes out of the barrel to finally let escape these gases, then the spring brings the seal fully back into the barrel and a second shot can take place.

Figure 1 is a general and longitudinal section of a revolver according to the invention.

Figure 2 is an exploded perspective view of the barrel according to the invention.

Figure 3 is a perspective view of the barrel and its shoulder according to the invention.

With reference to the figures, the barrel (1) comprises, at each ammunition chamber (4), a ring (2) provided with terminal holes (3), a return spring (5) compressing and resting on the said ring (2) and on the shoulder of the barrel (6).

The barrel (7) is formed, on its rear part, of a shoulder (8) where the seal (2) fits.

Figure 2 shows the possibility of concreting the shoulder of the barrel (6) using a second ring (6) sufficiently solid and provided with a screw thread.

Claims (5)

1) Revolver comprising a barrel (1) and a barrel (7) characterized in that the chambers (4) of  this barrel each comprise a sealing system consisting of a ring (2) which can be  move in the axis of the barrel on the action of the movement of the bullet and / or gases in order to create  a seal between the barrel (1) and the barrel (7). 2) Revolver according to claim I characterized in that the inner bore of the ring (2)  forms part of the conduit where the ball passes. 3) Revolver according to claim 2 characterized in that the ring (2) has its part  behind a shoulder on which rests a return spring (5) of said ring (2). 4) Revolver according to any one of the preceding claims, characterized in that  the inner bore of the ring (2) has blind holes (3) whose axes of the bodies are  between 0 "and 90 relative to the axis of the barrel (7) and in the direction of movement of the  ball to favor the forward movement of the sealing ring (2). 5) Revolver according to one of claims 1 to 4 characterized in that the end of the barrel (7),  side barrel (1), has a shoulder (8) in which engages the ring (2) at the time of  shot in order to constitute a labyrinth type joint while the bullet and the gases leave the  barrel (7).