Patent ID: 6042350
Filing Date: 2000-03-28
Classification: B60T,F04B,Y10T

Abstract:
A piston pump for a hydraulic system including:a pump housing;a cylindrical bore disposed within the pump housing,a pump piston adapted to reciprocate in the cylinder bore wherein the pump piston separates a working chamber from a suction chambera non-return inlet valve havinga spring housing with a radially-outward projecting flange encloses a closure member and a valve seat,a valve spring arranged in the spring housing cooperates with the pump piston to preload the closure member against the valve seat,a compression spring disposed about the spring housing preloads the radially-outward projecting flange of the spring housing against one end the pump piston, the spring housing is biased to the one end of the pump piston by the compression spring, the one end of the pump piston attached to the spring housing includes a joint chamfer which attaches into a sharp recess of a form-lock element of the spring housing.