NON-RETURN VALVE Russian patent published in 1999 - IPC

FIELD: pyrotechnology. SUBSTANCE: invention is meant for use in pyrotechnology for passage of flame force from pyrotechnic igniter to charge to initiate the latter and to prevent subsequent leakage of medium-explosion or combustion products in backward direction. Non-return valve has body with inlet and outlet passages, shut-off element with head and cylindrical tail part and bushing are mounted for axial displacement. Bushing uniaxially embraces tail part of shut-off element and is provided with side through holes to let medium pass. Outer diameter of butt of bushing facing shut-off element is less than outer diameter of surface of head of shut-off element interacting with it. Hole in bushing embracing tail part of shut-off element is through one. Mass of shut-off element is less than that of bushing. EFFECT: enhanced speed of response and reliability of separation of inlet and outlet passages of pyrotechnic system. 1 dwg