SEAL Russian patent published in 2012 - IPC F16J15/00 

FIELD: machine building.

SUBSTANCE: proposed device comprises O-ring with sealing jaw and wall, force element from elastic material representing round-section ring, support ring fixed relative to O-ring and adjusting ring fixed between O-ring and force element. Sealing jaw with thickness not exceeding j of its length has taper contact surface with width equal to thickness of said sealing jaw, taper apex facing sealing space side. Device may incorporate another O-ring, second force element and adjusting ring.

EFFECT: higher reliability.

3 cl, 2 dwg