Patent ID: 6457956
Filing Date: 2002-10-01
Classification: B60T,F04B

Abstract:
A piston pump comprising a pump housing with a piston guide, a piston that is guided so that it can move axially in the piston guide, a drivable drive element against which the piston rests and with which the piston can be driven to execute a reciprocating stroke motion in the axial direction, a restoring spring that engages the piston and presses the piston against the drive element, and a valve which is connected to the piston and controls a fluid flow direction through the piston pump, said piston (20) including a valve seat part (24), which has a valve seat (30) of the valve (44) that controls the fluid flow direction through the piston pump (10), said valve seat part (24) having a piston seal (32) which is of one piece with the valve seat part (24) and seals the piston (20) in the piston guide (14, 16), and said piston (20) having a support body (34) which is engaged by the restoring spring (38), wherein the support body (34) engages the valve seat part (24) spaced apart from the valve seat (30) and the piston seal (32).