Patent ID: 6318979
Filing Date: 2001-11-20
Classification: B60T,F04B,F16K

Abstract:
A piston pump, comprising a piston (16) that is driven in a reciprocating stroke motion, a check valve (28) that controls a flow direction through the piston pump, the piston (16) is embodied as a hollow piston with a wall (18), whose interior forms a positive displacement chamber (22) of the piston pump (10), the check valve (28) includes a valve hole (30), which is made in the piston (16) and has a channel-like valve closing body (32) that is mounted on the piston (16) with an open face of a channel (38) that covers the valve hole (30) of the piston (16), said valve closing body comprises a spring-elastic material, and at a same time forms a valve spring element.