HK1133919B - Fire arm or sports gun with silencer - Google Patents

Description

Air or fire rifle with noise dampener of the type comprising a firing mechanism, a barrel, a chamber, said air or fire rifle comprising an over-moulded or over-injected noise dampener on the mentioned barrel so that the barrel and damper form a single part.

BACKGROUND OF THE INVENTION

Various silencers and mechanisms to couple the silencer to the barrel of a carbine or pistol are known in the state of the art.

Thus, European Patent No 1247057, of 2000 , in the name of the company HECKLER & KOCH GMBH is known, which refers to a coupling device to secure a silencer on the barrel of a portable firearm that comprises a fastening for securing a silencer on the barrel of a portable firearm, with a silencer that essentially has the form of a tube, a coupling bracket fitted to the rear end of the silencer and a barrel mouth that adjusts to the coupling bracket, on which the coupling bracket can be secured, and the barrel mouth presents a non-round configuration, characterised in that a supplementary part is installed on the coupling bracket on the side opposite the first and which can rotate with a contra-form complementary to the non-round configuration, so that the supplementary part can secured to the barrel mouth only in one position of preset rotation angle, the silencer, together with the coupling bracket, is positioned so that it can rotate with respect to the supplementary part, and a blocking device is planed for inclusion, which will immobilise the silencer, together with the coupling bracket on the supplementary part, at a chosen angle of rotation, without it being able to rotate.

The same company also owns European Patent No 1117970 of 2000 , which refers to a coupling device for securing a silencer onto the barrel of a portable firearm relating to a fastening for securing a silencer onto the barrel of a portable firearm with a retention projection, which is positioned or configured on the silencer, and which presents an arrangement in the shape of an orifice the centres a contra-projection, which is positioned or configured on the barrel and which presents a centred arrangement in the shape of adjustment surfaces that adjust in the arrangement in the shape of an orifice and a pin that can be dismounted for securing the retention projection on the contra-projection, so that the arrangement in the shape of an orifice and the arrangement in the shape of adjustment surfaces are positioned centrally in a consecutive fashion in a seating zone, and with which at least one expansion space is configured between the two axial ends of the seating zone.

Lastly, European Patent 0772758 dated 1995 is also known, in the name of Mr Bernard Louvat, relating to a silencer for a rifle that refers to a noise-moderating device for a clay-pigeon or sports shotgun. It comprises a tubular body that adapts over the barrel(s) of the firearm and has a ring-shaped decompression chamber behind said tubular body, together with a series of internal transversal baffles held in place by separation parts and includes orifices that allow the lead shot to pass through and wad evacuation. It is intended to attenuate the noise and thus reduce acoustic contamination and refers to a silencer for firearms adaptable to all calibres of clay-pigeon or sports shotguns and rifles, single or double-barrel, side-by-side or over/under, together with gauge 12 or 14 garden rifles.

US 3 299 558 A , which describes a gun barrel with an over-molded plastic layer to dampen the noise level when striking against brush or rocks, forms a starting point for claim 1.

BRIEF DISCLOSURE OF THE INVENTION

This invention is a considerable advance in the air and fire rifles sector because it increases the performance of the firearm and reduces noise.

The economic advantages lie in the fact that noise dampener is manufactured by over-moulding or over-injection on the barrel so that the barrel and dampener form a single part.

In view of the fact that it can be manufactured by injection with over-moulding or over-injection means significant economic advantages in the production of the barrels with noise dampeners, since these usually comprises two independent parts.

As seen in the invention background, most of the patents refer to mechanisms to facilitate the coupling of the noise dampener to the barrel. The coupling must provide stability (no movement) as well as firing reliability, in other words, it has to fit and, at the same time, remain calibrated with the front and rear sights centred. This is one of the main problems, since centring is required each time the noise dampener is coupled to the barrel. This, on the contrary is not necessary in this invention because the front and rear sights are always centred because the front sight is fixed to the noise dampener, which is over-moulded onto the barrel.

All relating to the noise dampener insulating mechanism has also been improved. Traditionally, a series of loose parts are employed, generally wrapped in cotton or similar materials. The actual invention proposes the introduction of at least two parts with an acoustic labyrinth, which is an evident saving from the economic point of view, since it is very easy to install and manufacture and there is also a significant technical improvement, because when these parts are coupled inside the barrel, they always leave the exit pathway for the bullet or pellet correctly centred.

An objective of this invention is an air or fire rifle with noise dampener of the type comprising a firing mechanism, a barrel, a chamber, said air or fire rifle comprising an over-moulded or over-injected noise dampener on the mentioned barrel so that the barrel and damper form a single part.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to facilitate the description, the present report is accompanied by four sheets of drawings that show a practical case of exemplary embodiment, which is cited as a non-limiting example of the scope of the present invention:

• Figure 1 is a side view of the objective of this invention.
• Figure 2 is a section view through line II-II of Figure 1.
• Figure 3 is a section view through line III-III of Figure 1.
• Figure 4 is a view of the two parts of the noise damper insulating mechanism.

A SPECIFIC EMBODIMENT EXAMPLE OF THIS INVENTION

Figure 1 illustrates a barrel 1, a sight 6 and a noise dampener 3.

Figure 2 represents the barrel 1, the noise dampener 3, parts 4, 5 and a cover 10.

Figure 3 shows the barrel 1, the noise dampener 3, the cover 10, the sight 6 and a housing 7 for the parts.

Finally, figure 4 shows parts 4, 5, partitions 8 and neckings 9.

Thus, in a specific embodiment example, as shown in Figure 1, the objective of the invention consists in over-moulding or over-injecting a noise dampener 3 on the barrel 1.

In this way, they form a single part.

As can be seen in the section of Figure 2, there are two parts 4,5 inside the noise dampener 3, inside the housing 7 seen in Figure 3, which form part of the noise dampener 3 insulating mechanism, which forms said parts 4, 5 an acoustic labyrinth to provide maximum dampening of the firing noise, ending in a cover 10.

Said parts 4, 5 are formed interiorly by partitions 8 and neckings 9 on said partitions 8 which, on joining with or fitting both parts 4, 5 together inside the noise dampener 3 (Fig. 2) and, with respect to the inside of the noise dampener, determine a space or passage between the two parts as an extension of said chamber.

In an embodiment, the sight 6 can be fixed onto the noise dampener 3, just as illustrated in Figure 1.

This invention describes a new air or fire rifle with a noise dampener. The examples described here do not limit the present invention and it may have various applications and/or adaptations, all of which are within the scope of the following claims.

Claims (3)

1. Air or fire rifle with noise dampener of the type comprising a firing mechanism, a barrel (1), a chamber, said air or fire rifle comprising an over-moulded or over-injected noise dampener (3) on the mentioned barrel (1) so that the barrel (1) and damper (3) form a single part.
2. Air or fire rifle in accordance with claim 1 characterised in that the noise dampener (3) insulating mechanism comprises an acoustic labyrinth, formed by at least two parts (4, 5) that fit together and with respect to the inside of the noise dampener, determine a space between the two parts as an extension of the mentioned chamber.
3. Air or fire rifle in accordance with claim 1 characterised in that it comprises a sight (6) fixed to the noise dampener (3).