Power steering pump

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

Patent

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F04C 2/356 (2006.01) B62D 5/06 (2006.01) B62D 5/10 (2006.01) F04B 49/00 (2006.01) F04B 49/08 (2006.01) F04C 2/00 (2006.01) F04C 2/344 (2006.01) F04C 13/00 (2006.01) F04C 15/00 (2006.01) F04D 1/00 (2006.01)

Patent

CA 1177326

Abstract The disclosure relates to a cheek plate unloading slipper vane pump for supplying fluid to a system. A fluid passage in the cheek plate receives flow from the contracting pockets. The passage has a portion directing flow from the contracting pumping pockets radially in- wardly of the cheek plate. A tubular member is fixedly attached to the cheek plate coaxially with the axis of relative rotation of the rotor, and the interior of the tubular member communicates with the portion of the fluid passage directing flow radially inwardly. A housing member that defines a chamber in which the cam ring, rotor and cheek plate are located has a discharge orifice coaxial with the tubular member. A seal is provided between the rubular member and the housing member enabling the tubular member to move with the cheek plate relative to the housing member while maintaining the seal.

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