RU2216702C2 - Device preventing lock recoil at initial moment of shot - Google Patents

Abstract

FIELD: firearms. SUBSTANCE: device preventing lock recoil at initial moment of shot in hand semiautomatic weapon and utilizing energy of powder gases discharged from bore through gas outlet in its wall has locking member in the form of cut spring bushing with firing stops mounted on barrel close to cartridge chamber for shut-off of gas outlet in bore wall and mechanical engagement of lock with barrel till pressure of gases in bore falls to established value. Device operates if cartridge of enhanced power is used and if conventional cartridge is used pressure of powder gases will not overcome rigidity of cut spring bushing and principle of operation of automatics of weapon with free lock will be realized. EFFECT: increased functional reliability of automatics of pistol when ammunition of various power is used, reduced mass and overall dimensions of device in comparison with analog. 1 cl, 2 dwg

Description

 The invention relates to the field of semi-automatic firearms, namely, locking devices between the barrel and the bolt.

 Widely used pistols with a free shutter and a relatively low-power cartridge (for example, PM, APS, Walter PP and others) have lost their attractiveness for the army due to the appearance of bulletproof vests. The use of a newly introduced high-power cartridge with a supersonic bullet in such pistols requires the introduction of special additional devices. Closest to the claimed invention is a device that prevents the recoil of the bolt at the initial moment of the shot, the P-7 pistol company Huckler-Koch (according to the Barnitzke principle), which consists in the fact that the powder gases discharged from the barrel, at the time of the shot affect the piston located under the barrel, in the direction opposite to the direction of recoil of the shutter (German patent 2627641, F 41 C 19/14, 1976).

 The task to which the invention is directed is the ability to maintain a single pistol in the arsenal of the army and police while using cartridges of different capacities.

 The technical result that can be obtained by carrying out the invention is to increase the reliability of the pistol automatics when using ammunition of different power. Decrease in weight and overall dimensions of the device in comparison with the analogue.

 The technical result is achieved by the fact that in the device that prevents the shutter from rolling back at the initial moment of the shot, in addition to the signs similar to the closest analogue, this is the presence in the barrel wall of an outlet for removing powder gases designed to delay the unlocking movement of the shutter, new ones are introduced that are distinctive from the closest analogue to the signs, consisting in the introduction of a mechanical locking element, made in the form of a split spring sleeve with support stops, and the sleeve is put on the barrel at the chamber and blocks gas escape hole.

 The sleeve has the ability to mechanically engage the bolt with the barrel, deforming under the influence of powder gases at the initial moment of the shot.

 The device is illustrated in the drawing, where in Fig.1 shows a longitudinal section of the device in General, in Fig.2 is a split spring sleeve of the device.

 The device includes: a hole 1 in the wall of the barrel, a split spring sleeve 2 with combat stops 3, a washer-ring 4, a protrusion 5 of the trigger release switch, a profiled section 6 of the sleeve 2, the shutter 7.

 In special cases, the cut 6 of the spring sleeve 2 can be made direct, and the number and location of the combat stops 3 can be changed depending on the mass of the shutter 7 and the power of the cartridge.

 The split spring sleeve 2 is made of steel, has an antifriction isothermal coating.

 The device works as follows: when fired by a high-power cartridge, the powder gases discharged through the hole 1 in the barrel wall act on the inner surface of the split spring sleeve 2, overcoming the rigidity of the split spring sleeve 2, deform it. The spring sleeve 2 with the edges of the profiled section 6 slides along the surface of the barrel, the diameter of the sleeve 2 increases, the fighting stops 3 interact with the corresponding grooves on the shutter body 7. Thus, the shutter is mechanically engaged with the barrel until the pressure of the powder gases decreases to set value required for normal shutter release. The washer-ring 4 prevents the breakthrough of powder gases forward along the barrel. The protrusion 5 of the trigger guard lock prevents rotation of the sleeve 2.

 When fired with a conventional cartridge, the pressure of the powder gases is insufficient to overcome the stiffness of the split spring sleeve 2 and the principle of operation of automatic weapons with a free bolt is implemented.

Claims (2)

 1. A device to prevent recoil of the bolt at the initial instant of the shot in a semi-automatic handgun firearm using the energy of powder gases discharged from the barrel through a gas outlet in its wall, characterized in that it contains a locking element in the form of a split spring sleeve with combat stops, mounted on the barrel at the chamber with the possibility of blocking the gas outlet in the barrel wall and the mechanical engagement of the bolt with the barrel to reduce the gas pressure in trunk anal to the set value.  2. The device according to claim 1, characterized in that to ensure the use of cartridges of different power, the geometric parameters of the device and the stiffness of the split spring sleeve are selected from the condition that the bolt can engage with the barrel, if the cartridge is used with increased power, and the possibility of implementing the principle of the free shutter when using a conventional cartridge.

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