CHECK VALVE Russian patent published in 2007 - IPC F16K15/02 F16K1/12 

FIELD: valving systems.

SUBSTANCE: check valve comprises housing provided with recesses from both sides. The recesses are separated by a cross-piece with conical surfaces and connected with the passages in the valving member through the radial inlet and outlet passages. The valving member is made of by-passing bushing that is mounted at the housing axis between the inlet and outlet branch pipes provided with flanges. When the pump unit stops operation, the by-passing bushing is mounted for permitting movement with respect to the axis of the housing to cut off the outlet passages cooperating with the arresting sealing member mounted in the groove. The groove is made in the face of the inlet branch pipe flange. The outer diameters of the flanges of the branch pipes are provided with open grooves and receive the traverse that is provided with the central opening for the eccentric provided with control levers and corrugated flexible bushing and connects the housing with branch pipe flanges. The bushing cooperates with the by-passing bushing through the ring groove for forced coincidence of the passages of the housing with the by-passing bushing when it cooperates with the arresting sealing member mounted in the groove.

EFFECT: simplified manufacturing and improved maintainability.

1 cl, 5 dwg