Patent ID: 6694729
Filing Date: 2004-02-24
Classification: F01B,F04B

Abstract:
A pump unit comprising:a housing having a first end and a second end and a plurality of sides; a cylinder block located in the housing and having a plurality of pistons mounted therein; a swash plate contained within the housing and engaging the pistons; an end cap comprising a first side attached to the second end of the housing and having a running surface for the cylinder block formed thereon, and a second side formed opposite the first side; porting formed within the end cap in communication with the cylinder block; a charge pump in communication with the porting; and a pump shaft having a first driven end with a first mating feature formed thereon, a second end having a second mating feature formed thereon, where the second end of the pump shaft extends through both sides of the end cap, so that the second mating feature is located entirely outside the pump unit.