Patent ID: 9140257
Filing Date: 2015-09-22
Classification: B60T,F04B

Abstract:
1. A piston pump for a hydraulic vehicle braking system, comprising: a pump piston configured to be driven in a to-and-fro lifting movement, and at least one spring-loaded nonreturn valve configured to control a throughflow direction through the piston pump, the nonreturn valve having a valve seat, a shut-off body and a valve closing spring configured to load the shut-off body against the valve seat, wherein the shut-off body has a damper body, together with which it is lifted off from the valve seat during the opening of the nonreturn valve and together with which it is loaded against the valve seat by the valve closing spring, wherein the shut-off body is movable with respect to the damper body in the opening and the closing direction, wherein the damper body is received in a damper chamber and defines an annular gap between said damper body and said damper chamber sized and configured to permit displacement of fluid from the damper chamber around said damper body as said damper body moves during the opening of the nonreturn valve, and wherein the shut-off body is movable transversely to its opening and closing direction to provide sealing orientation of the shut-off body on the valve seat during the closing of the nonreturn valve.