Patent ID: 6358020
Filing Date: 2002-03-19
Classification: F01C,F04C,Y10T

Abstract:
A cartridge-type pump for a power steering system and intended to be received within a pump housing, comprising:an upper plate having a generally planar inner surface; a lower plate having a generally planar inner surface; a cam plate disposed between said upper plate and said lower plate, said cam plate having a first surface in direct contact with said inner surface of said upper plate and a second surface in direct contact with said inner surface of said lower plate; a bore formed in said cam plate and a rotor disposed in said bore; a plurality of alignment pins pressed into and not passing all the way through a respective one of a plurality of holes formed in said inner surface of said lower plate and passing trough passages in said cam plate and said upper plate to align said plates; and a plurality of retaining clips secured to a respective one of said plurality of alignment pins to hold said plates together and form the pump; wherein the catridge-type pump can be built and tested separate from the pump housing into which it is intended to be positioned, the pump not having any separate structure attached thereto intended to secure the pump to said pump housing; the said lower plate having a recess formed therein for receipt of a seal to input pressure on and help seal the pump.