RU2155309C1 - Muzzle brake - Google Patents

Abstract

FIELD: muzzle attachments used for recoil reduction, applicable for improvement of the small arms war characteristics. SUBSTANCE: chamber has a shutter installed for shifting under the effect of powder gases up to the complete closing of the central port in the period of after effect. EFFECT: reduced recoil momentum of barrel and weapon. 2 cl, 5 dwg

Description

 The invention relates to automatic weapons and can be used to improve the combat characteristics of small arms.

 Widely known are muzzle brake devices designed to reduce the recoil momentum of a weapon (see the book by V. I. Nadin, Skorin I.A. et al. "Artillery", DOSAAF Publishing House, Moscow, 1972, pp. 124-125) The muzzle brake forces the outflow of powder gases through the side windows to the sides, reducing the gas flow in the direction of the axis of the bore, which reduces the reactive force in the direction of movement of the barrel, but the outflowing powder at high pressures and speeds in the axial direction after the projectile or bullet is substantially affect rollback e of the weapons on hand and power fasteners weapons complexes.

 Known muzzle brake containing a camera mounted on the muzzle of the barrel with side windows in the front wall of the chamber for passing a projectile. The camera is equipped with a shutter installed with the possibility of displacement under the action of pressure of the powder gases (see US patent N 5652406, F 41 A 21/00 from 07/29/97), which is taken as a prototype.

 A disadvantage of the known device is the insufficiently high efficiency of the use of energy of powder gases during the aftereffect, because the shutter partially overlaps the central window during the aftereffect and part of the powder gases nevertheless expires through the central window after the projectile, reducing the effectiveness of the muzzle brake.

 The main task to be solved by the claimed invention is directed is to increase the energy efficiency of powder gases by increasing the area of the front wall of the muzzle brake during the aftereffect.

 The technical result achieved during the implementation of the invention is to reduce the recoil momentum of the barrel and weapons, which positively affects the arrow or power elements of the weapon mounting on the installations, as well as the accuracy of the shooting.

 The specified technical result is achieved by the fact that in a known muzzle brake containing a chamber mounted on the muzzle of the barrel with side windows for the expiration of powder gases and a central window in the front wall of the chamber for passing the projectile, a shutter mounted with the possibility of displacement under the influence of pressure of the powder gases, it ensures the shutter is displaced until the central window completely overlaps during the aftereffect, while the shutter is pivotally mounted on an axis in the lower part of the chamber and is spring-loaded with eccentricity that the axis of rotation.

Compared with the prototype of the claimed technical solution has the following differences:
- the central window in the front wall of the chamber during the aftereffect is completely blocked by a shutter installed with the possibility of displacement under the influence of the pressure of the powder gases, which increases the area of the front wall, which is affected by the pressure of the powder gases, creating a force pulling the barrel forward, i.e. the efficiency of the use of energy of powder gases is increased, while the technical characteristics that determine the force of the impact of the weapon on the shooter or on the power elements of the fastening of weapons in complexes are improved, and therefore, the accuracy characteristics of the weapon are improved.

 Thus, the proposed technical solution has a "NEW" and "INVENTIVE LEVEL".

The invention is illustrated in the drawing, where in FIG. 1 shows a muzzle brake with a central window blocked by a shutter during the aftereffect;
in FIG. 2 - before firing a shot;
in FIG. 3 is a view along arrow B;
in FIG. 4 - cross section along G-G;
in FIG. 5 is a diagram of the action of powder gases on a movable damper.

 The muzzle brake contains a fixed chamber 1, mounted on the barrel 2, a movable shutter 3, pivotally mounted on an axis 4, mounted in the lower part of the fixed chamber 1 with the possibility of turning clockwise by a spring 5 located on the follower 6. F - the resultant force; a - eccentricity.

 During the shot, after the projectile (bullet) passes through the cavity of the muzzle brake, the pressure of expanding powder gases P acts on the front wall of the shutter 3 and due to the eccentricity of the resulting force F relative to the axis of rotation (Fig. 5), the shutter 3 instantly turns counterclockwise until it stops in plane "B" of camera 1, i.e. before closing the front window of the muzzle brake. Due to this, the vast majority of the energy of the powder gases during the aftereffect is spent on reducing the recoil momentum of the barrel (weapon).

Claims (2)

 1. A muzzle brake, comprising a chamber mounted on the muzzle of the barrel with side windows for the expiration of powder gases and a central window in the front wall of the chamber for passing the projectile, a shutter installed with the possibility of displacement under pressure of the powder gases, characterized in that the shutter is displaced to full overlapping of the central window during the aftereffect.  2. The muzzle brake according to claim 1, characterized in that the shutter is pivotally mounted on an axis in the lower part of the chamber and is spring loaded with eccentricity relative to the axis of rotation.

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