HYDROPNEUMATIC GUN Russian patent published in 1999 - IPC

FIELD: sporting equipment, in particular, sporting guns for underwater shooting, applicable in pneumatic rifles. SUBSTANCE: the barrel of the hydropneumatic gun accommodates a working piston having an opening equal to the diameter of the harpoon tail section; the harpoon is made in the form of two cylinders, and its traveling section is positioned in the compression zone of the pressure piston and linked with the working piston; the pneumatic spring is located in the interior of the pressure piston and linked with the discharge revolving lever of the harpoon-line. Controllable check valve communicating the compression zone of the pressure piston with the overboard space is installed in the gun body. The axial line of the pneumatic spring working stroke is positioned at on angle to the barrel axial line. EFFECT: fuller utilization of the pneumatic spring power, enhanced reliability, enhanced accuracy of fire. 3 cl, 2 dwg