PNEUMATIC UNDERWATER GUN Russian patent published in 2008 - IPC F41B11/08 F41B11/12 F41C9/06 

FIELD: pneumatic weapon, applicable in pneumatic arbalest.

SUBSTANCE: the pneumatic underwater gun has a body, receiver, pneumatic breechblock, barrel, operating piston, sear and drop-line lever and a handle installed for axial motion, the pneumatic breechblock is installed with the working stroke in the shot direction and is provided with a back stroke fixing stop and a restrictor of the working stroke in the shot direction. The pneumatic breechblock is coupled by means of the larger-section piston to the barrel cavity, by means of the smaller-section piston-to the intake space. The trigger sear is made in the form of a piston and installed in a through duct of the body linked with the receiver cavity and the intake space. The working piston is provided with a water-removing ring and a vacuum collar. The sealing collar of the working piston is installed for axial motion in an annular groove whose exterior surface is coupled to the barrel cavity through a duct. A ratchet wheel is installed in the handle, it is linked with the hammer and a tie-rod, is provided with stops corresponding to the angle of attack of the ratchet wheel stop. The harpoon is made in the form of a polyhedral prism, whose bases are turned at and angle relative to one another. The tip is provided with a dagger-type blade with a double-edged sharpening, the blade width exceeds the tip diameter by 1.1-3 times.

EFFECT: improved operating characteristic, enhanced safety of operation and efficiency of use of the shot power and target hitting.

2 cl, 9 dwg