HYDROPNEUMATIC HARPOON RIFLE FOR UNDERWATER HUNTING Russian patent published in 1998 - IPC

FIELD: underwater hunting. SUBSTANCE: hydropneumatic harpoon rifle includes barrel 1 with harpoon 2, receiver 3 and hydraulic pump. Valve gear of rifle incorporates main chamber 4 with outlet hole 5 and auxiliary chamber 6 with drain hole 7. Two pistons 8 and 10 spring-loaded one with regard to another are positioned in chambers 4 and 6. Water goes from hydraulic pump through chamber 6, throttle clearance 9, chamber 4 into receiver 3. With shot trigger mechanism 13 moves piston 10 via pusher 12. Water from chamber 6 goes outside and water from receiver 3 and chamber 4 streams through outlet hole 5 into barrel 1 and pushes harpoon 2 out. EFFECT: increased operational reliability and expanded functional capabilities of rifle. 1 dwg