Patent ID: 6655255
Filing Date: 2003-12-02
Classification: F04B

Abstract:
A variable displacement axial piston pump adapted for use in a fluid system, comprising:a housing having a body portion and a head portion with an inlet port passage and an outlet port passage; a rotating group disposed in the body portion and having an axis of rotation and including a barrel having a plurality of cylinder bores, a plurality of piston assemblies with each of the plurality of piston assemblies having a piston slideably disposed within one of the cylinder bores and a shoe pivotably attached to and extending from the piston, the rotating group being in fluid communication with the inlet and outlet port passages of the housing head portion; and a swashplate arrangement disposed in the body portion and being pivotable in a first arcuate direction relative to the axis of rotation of the barrel and pivotable in a second arcuate direction, the swashplate arrangement being pivotable in the second arcuate direction in response to various system parameters, wherein the swashplate mechanism includes a primary member and a secondary member that is pivotable relative to the primary member.