Patent ID: 6666670
Filing Date: 2003-12-23
Classification: F01C,F04C

Abstract:
A power steering pump for an automotive vehicle comprising:a housing having an Inner housing wall about an axis, said inner housing wall comprising at least one axial groove; a cam plate received in the housing and defining a cam chamber, said cam plate comprising a perimeter adjacent said inner housing wall and a locator rib received in the axial groove; a rotor coaxially received in the cam chamber and comprising retractable vanes that cooperate with the cam chamber to pressurize fluid; and an outlet communicating with the cam chamber for discharging pressurized fluid from said cam chamber, wherein the axial groove and locator rib are disposed adjacent the outlet port, and wherein, in the absence of pressurized fluid within the cam chamber, the perimeter of the cam plate about the rib is radially spaced apart from the inner housing wall by a first dimension and the locator rib is radially spaced apart from the groove by a second dimension less than the first dimension.