Combined fluid pressure actuated fuel and oil pump

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

Patent

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123/16

F04B 43/06 (2006.01)

Patent

CA 1204354

ABSTRACT OF DISCLOSURE Disclosed herein is a fluid pressure actuated motor comprising a housing, a motor piston movable reciprocally in the housing and dividing the housing into a relatively low pressure chamber and a relatively high pressure chamber, a piston biasing the motor piston so as to displace the motor piston in the direction minimizing the volume of one of the pressure chambers and maximizing the volume of the other of said pressure chambers, structure for creating a fluid pressure differential between the high and low pressure chambers so as to displace the motor piston in the direction minimizing the volume of the other pressure chamber and maximizing the volume of the one pressure chamber, mechanism responsive to motor piston movement minimizing the volume of the other pressure chamber for establishing communication between the high and low pressure chambers so as thereby to reduce the pressure differential between the high and low pressure chambers and thereby permit displacement of the motor piston by the biasing means in the direction minimizing the volume of the one pressure chamber and maximizing the volume of the other pressure chamber, and structure responsive to motor piston movement minimizing the volume of the one pressure chamber for discontinuing communication between the high and low pressure chambers so as to thereby permit the creation of fluid pressure differential between the high and low pressure chambers by the fluid pressure differential creating structure and thereby effect displacement of the motor piston in the direction minimizing the volume of the other pressure chamber and maximizing the volume of the one pressure chamber.

474594

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