Patent ID: 6394770
Filing Date: 2002-05-28
Classification: B60T,F04B,Y10T

Abstract:
A piston pump (10), having a piston (20) which is axially displaceably received in a pump housing (16) and which can be driven to execute a reciprocating stroke motion that includes a supply stroke and a return stroke, and having an inlet check valve (38) which is mounted on the piston (20), wherein the piston pump (10) has a valve opening device (56, 62), which opens the inlet check valve (38) at the onset of the return stroke of the piston (20), and that the inlet check valve (38) has a valve closing body (42), and a valve stroke limiter (74), which valve stroke limiter limits an opening stroke of the valve closing body (42) of the inlet check valve (38) to a predetermined length, which valve stroke limiter slaves the valve closing body (42) of the inlet check valve (38) to the piston (20) during the return stroke of the piston (20), the valve closing body having been lifted from a valve seat (40) of the inlet check valve (38) by the predetermined length during the onset of the opening stroke.