CHECK VALVE Russian patent published in 1995 - IPC

FIELD: valving. SUBSTANCE: when hydraulic mixture flows through passage 3 of housing 4, the top part of gate 5 moves and rotates around pivot 10 positioned on rotatable lever 7 owing to pivot 10 is positioned below the center of gravity of gate 5. The bottom edge of gate 5 is pressed to seat 1 and slides over its sealing surface upward. The gate is held in this position by extension spring 8 interposed between the top edge of gate 5 and lever 7. Further opening of passage 3 is carried-out by rotating gate 5 together with lever 7 around pivot 6 mounted on seat 1. EFFECT: enhanced reliability. 3 dwg