CHECK VALVE Russian patent published in 2007 - IPC F16K15/02 F16K15/06 

FIELD: valving systems.

SUBSTANCE: check valve comprises housing and valving member. The valving member is positioned at the housing axis. One side of the housing is provided with the conical central passage for flowing fluid. The other side is provided with recess and collar with bearing surface. The chamber is made between the collar and conical side. The valving member is provided with passages and surfaces corresponding to the conical surfaces and is mounted for permitting movement inside the chamber of the housing and cutting off the central passage for fluid flow when the conical surfaces of the valving member cooperates with the housing.

EFFECT: enhanced reliability and prolonged service life.

1 cl,4 dwg