PNEUMATIC WEAPON Russian patent published in 1994 - IPC

FIELD: pneumatic weapons. SUBSTANCE: device comprises receiver 1 whose cylindrical part accommodates casing 2 with pipe union 3 disposed on axis of launching chamber. Installed movably on end of pipe union 3 is shutoff device 5 in the form of thin-walled cap of flexible material covering the tapered inlet 8 into bypass channel 6 leading to channel of bore 7. Control chamber 9 between shutoff device 5 and pipe union 3 communicates through line 10 with launching valve 11 and two-stage pump 12. Valve 18 serves as pressure valve of second stage. Lever 19 connects bore 7 with slider 20 which imparts progressive motion to case 13 and cocks the release mechanism consisting of trigger 21, sear 22 and rocker 23. As trigger 21 is pressed, valve 11 opens, pressure in line 10 and cavity 9 drops and working pressure in launching chamber 4 throws back shutoff device 5, opening access to bypass channel 6 and thence to channel of bore 7. EFFECT: higher efficiency of utilizing potential energy of compressed gas for acceleration of bullet in barrel of pneumatic weapon. 2 dwg