Scatter-rifle with gasses withdrawal

FIELD: auto-loading smoothbore rifles.

SUBSTANCE: the invention is pertinent to the field of scatter-rifles with gasses withdrawal, in particular, to the auto-loading smoothbore rifles. The scatter-rifles with gasses withdrawal contains a barrel, on which there is a cylinder with a reloading piston linked with a rod, a retracting spring, a gear to control pressure of the gases made in the form of a valve and a spring, an automatics switching-off safety valve having a bucket with two grooves. At that the mentioned piston is located inside the cylinder in front of the reloading piston with a capability of a longitudinal motion perpendicularly to the barrel. The invention allows to operate in an automatic mode using cartridges of different power and to readjust for a manual reloading.

EFFECT: the invention allows to operate in an automatic mode using cartridges of different power and to readjust for a manual reloading.

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The invention relates to grabovym guns with the exhaust gases, in particular to a self-loading shotguns.

A known mechanism for adjusting the gas pressure automatic weapons on the patent of Russian Federation №2164334, CL IPC 7 F 41 A 5/28, comprising a housing, the piston and spring-loaded valve. When the excessive pressure in the housing, the valve opens and the excess gas is discharged to atmosphere. This embodiment allows the use of cartridges of different capacities. The disadvantage of this device is the lack of mute automation, switching weapons to manual reloading, which reduces consumer properties of the product.

Known Grabovoi rifle for U.S. patent No.4,395,937, CL 89-128 containing barrel, a cylinder with a bowling ball return mechanisms, piston, valve device to disable the automatic running of the movement of the forearm, where the valve device has a rotational movement and is placed in the cylinder.

The disadvantage of the described device are large its dimensions, which does not allow you to place the node reset excess pressure when working with a powerful cartridges, which reduces the versatility of the gun, i.e. the inability to use cartridges of different capacities.

The present invention is to increase the universality of the guns, which can be operated in automatic mode with different capacity cartridge is and can be reset to manual reloading.

The problem is solved using a shot gun exhaust gas discharge containing a barrel, a cylinder with a bowling ball return mechanisms, piston, valve device to disable the automatic running of the movement of the forearm, where the valve device is designed as a piston with two grooves located in the cylinder perpendicular to the barrel, before bowling ball return mechanisms piston, with the possibility of longitudinal movement.

Placing the valve device perpendicular to the barrel, cylinder, before bowling ball return mechanisms piston, with the possibility of longitudinal movement allows you to save a known mechanism for adjusting the gas pressure automatic weapons on the patent of Russian Federation №2164334, which improves consumer properties of products, but it along with the application, in the automatic mode, cartridges of different capacities, provides the opportunity to transfer weapons from automatic mode to manual reloading.

The invention is illustrated by drawings, where figure 1 shows a General view of the position of the automatic mode, figure 2 - General view of the position of manual reloading, figure 3 - section a-a figure 1, figure 4 - cross-section B-B figure 2

Grabovoi gun exhaust gas discharge contains a shaft 1 on which is located a cylinder 2 with a bowling ball return mechanisms piston 3 connected with a thrust of 4, a return spring 5, the adjustment mechanism pressure ha is found in the form of a valve 6 and springs 7, valve device consisting of a piston 8 with two grooves 9 and belts 10. The piston 8 belts 10 has the ability to block the hole 11 made in the shaft 1 and the cylinder 2, using the forearm 12 with bevels 13. Translated from the automatic mode to the manual cocking produced with the assistance of the established on the axis 14 of the lever 15 with an opening 16, spring-loaded by a spring 17 and the latch 18 mounted in a bowling ball return mechanisms, the piston 3.

Grabovoi gun with fume extraction works as follows:

With the automatic recharging of the gas from the barrel 1 through the holes 11 (Fig 3) and grooves 9 of the piston 8 passes for bowling ball return mechanisms, the piston 3.

When a powerful cartridge, excessive pressure moves the valve 6 and the excess gas is discharged to atmosphere. The valve 6 under the action of the spring 7 is closed under the action of gases begins to move bowling ball return mechanisms, the piston 3, which in turn moves the rod 4 ago (in the drawing to the right), and then due to the return spring 5 bowling ball return mechanisms, the piston 3 is returned to its original position, is recharging (ejected cartridge case and chamber installed a new cartridge). To switch guns on manual reloading is required to press the lever 15 and move the forearm 12 ago (in the drawing to the right) and release the lever 15. The lever 15 to its hole 16 engages with the latch 18. Cevi the 12 is rigidly connected with a bowling ball return mechanisms piston 3. When moving the forearm 12, due to the bevels 13 moves the piston 8, which is their belts 10 overlaps the openings 11 and when firing gases do not have the opportunity to go to a bowling ball return mechanisms, the piston 3. Gun ready to manual reloading by moving the forearm 12 back, which moves the bowling ball return mechanisms, the piston 3 with a thrust of 4.

Grabovoi gun with exhaust gases containing barrel, a cylinder with a bowling ball return mechanisms, piston, valve device to disconnect the automatics with the piston and the working movement of the forearm, characterized in that the piston valve device to disable automatic is made with two grooves and is located in the cylinder before bowling ball return mechanisms, piston with the possibility of longitudinal displacement perpendicular to the barrel.