EP0772758B1 - Gun silencer - Google Patents

Description

The subject of the present invention is a sound moderator for clay pigeon shooting or Recreation.

It is intended to attenuate noise and decrease noise pollution, and concerns a silencer for shooting weapons adaptable to rifles or rifles to double clay pigeon shooting or leisure cannons of all calibers, juxtaposed or superimposed, as well as on the rifles of garden gauge 12 or 14 mm.

To date there are a large number of silencer for firearms such as, for example, that described in patent US 4,907,488 (SEBERGER) which state of a cylindrical silencer fixed on the barrel of a firearm. This device includes a quasi-parabolic reflector placed in front of the muzzle of the weapon and leader most of the landfill and wave gases sound to a tuned room located behind the muzzle. The second section of the silencer includes two series of chambers and hollow deflectors semi-spherical which divide the landfill gases and the sound wave in two parts following paths of different lengths to meet in a room where they annihilate each other. The spacing of deflectors is determined to transform the noise from the ultrasonic discharge. US-A-4,907,488 is considered the state of the closest technique.

However, no gun silencer existing to date is to our knowledge specifically adapted for clay pigeon shooting or leisure.

However, many clay pigeon stands located in outskirts of cities face problems due to the strong deflagration and the resonance of the blows repeated rifles,

The device according to the present invention has aims to remedy this state of affairs and is particularly intended to considerably reduce nuisance caused by recreational shooting in the environment urban and clay pigeon shooting stands, so as to allow they continue to exist near cities.

It consists of a tubular body adapting to the barrels of the weapon and comprising the elements mentioned in claim 1.

la figure 1 représente une coupe longitudinale d'un fusil à deux canons superposés équipé d'un modérateur de son,

la figure 2 est une coupe transversale suivant les flèches A-A de la figure 1

et les figures 3 à 6 sont des coupes transversales suivant les flèches B-B de la figure 1 montrant différentes formes possibles du dispositif.

In the accompanying drawings, given by way of nonlimiting examples of embodiments of the subject of the invention:

FIG. 1 represents a longitudinal section of a rifle with two superimposed barrels equipped with a sound moderator,

Figure 2 is a cross section along the arrows AA of Figure 1

and Figures 3 to 6 are cross sections along the arrows BB of Figure 1 showing different possible forms of the device.

The device comprises, a tubular body 1 provided at one end with a centering piece 2 in which barrels 3 are inserted, and to the other end of a plug 4.

Inside the body 1 are arranged several baffles or deflectors 5 held in place at using spacers 6, as well as possibly an intermediate centering piece 7.

These deflectors 5 as well as the plug 4 are machined from an orifice 8 to allow the free passage of sheaves of lead and the evacuation of wads, such as indicated by the arrows F, while braking the speed one of the main sources of combustion gases noise.

The intermediate centering piece 7 is pierced with several passages 9 to allow return behind the combustion gases in a 10 annular decompression located between the two parts centering, around the barrels 3, the gas outlet is making use of discharge orifices 11 provided in the body 1. This arrangement makes it possible to draw several successive strokes without loss of yield, while ventilating the sound moderator.

The latter is an integral part of the weapon and caps the cannons 3 over three quarters of their length from which we will have previously removed part of the strip of aim 12. The upper part of the body 1 is determined to coincide exactly with the sighting strip 12 remaining so as to maintain the original aim of the weapon (Figure 1).

The orifices 8 of the deflectors 5 and of the plug 4 may have an increasing diameter of the outlet of the cannons 3 towards the outside of the sound moderator, for allow free passage of the sheaf of pellets as well that the evacuation of the flock, as indicated by the arrows F, while braking the gas speed of one of the main sources of noise.

The moderator of his handset with subsonic clay pigeon cartridges can reduce the noise about 70%.

The weight, shape and dimensions of the device described above may vary depending on the weapon as well as its caliber.

Claims (2)

1. Noise moderating device for used on clay pigeon-type shotguns, adaptable to double-barrel shotguns of all calibres, side-by-side horizontal or vertical barrel arrangement, and consisting of a combination of a tubular encasement (1) which can be fitted on the barrels (3) of the weapon and comprising an annular decompression chamber (10) arranged at the rear of the said tubular encasement, together with a series of internal cross deflectors (5) held by spacers (6), the said tubular encasement in the assembled position on the weapon coinciding exactly with the aiming sight (12) of the shotgun, from which has been previously removed a part in order to retain the original sight of the weapon, capping the barrels (3) for three quarters of their length and being equipped at one end with a centring piece (2) in which are inserted the said barrels, and at the other end a plug (4), an intermediate inner centring part drilled with several holes (9) allowing return of the gases into the decompression chamber (10) and their evacuation through the orifices (11) arranged in the tubular body, the said decompression chamber being situated between the two centring parts (2, 7), around the barrels (3), the plug (4) and the deflectors (5) being each one fitted with an orifice (8) allowing the passage of the projectiles and the packing.
2. Device as per claim 1 categorised in that the orifices (8) of the deflectors (5) and the plug (4) have a diameter which increases at the barrel exit (3) in the direction of the tubular body (1).

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