Power steering pump

F - Mech Eng,Light,Heat,Weapons – 04 – C

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103/96

F04C 2/356 (2006.01) B62D 5/06 (2006.01) B62D 6/02 (2006.01)

Patent

CA 1156088

POWER STEERING PUMP ABSTRACT OF THE DISCLOSURE A power steering pump having a cam with an internal cam surface defining pumping arcs, a rotor in said cam, pump- ing elements preferably in the form of slippers carried by the periphery of the rotor in sliding engagement with the pumping arcs, flow control valve means having a movable valve element responsive to both static pressure and velocity pres- sure of the displaced fluid on the high pressure side of the pump wherein provision is made or decreasing the volume of fluid delivered by the pump at high pressure upon an increase in the speed of the rotor, and means for equalizing the pres- sure between the volume of fluid between two adjacent pumping elements located at a high pressure outlet port and a corres- ponding volume of fluid between two other adjacent slippers located at a low pressure inlet port as the pumping elements pass through their respective pump cycles.

324473

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