Patent ID: 6334762
Filing Date: 2002-01-01
Classification: B60T,F04B

Abstract:
A piston pump comprising a pump housing, a piston that is driven in a reciprocating stroke motion in the axial direction and is contained so that the piston moves axially in a sleeve (26) which is inserted into said pump housing, a sealing part (68) which is inserted into the pump housing adjacent an end face of the bottom (64) of the sleeve, which end face is oriented toward the sealing part (68), the sealing part being positioned in such a way that it seals the pump housing, the piston pump (10) has a through flow conduit (90, 96) between the sealing part (68) and the sleeve (26), a radially inner part of the through flow conduit (90, 96) is constituted by a radially inner first groove (90) in the sleeve bottom (64), the radially inner first groove communicates with a radially outer second groove (96) of the through flow conduit (90, 96) in the sealing part (68).