Patent ID: 7445106

Claim:
A power transmission device comprising: a housing; a rotatable input member at least partially positioned within said housing; a rotatable output member at least partially positioned within said housing; a spindle rotatably supported by said housing and fixed for rotation with said rotatable output member; a friction clutch operable to selectively transfer torque between said input member and said spindle; and an actuator operable to provide an actuating force to said friction clutch, said actuator including an electric motor having an output shaft drivingly coupled to a gerotor, said gerotor being operable to supply pressurized fluid to a piston acting on said friction clutch, said piston being positioned within a closed cavity in communication with an outlet port of said gerotor, wherein an end of said rotatable input member and an end of said rotatable output member are supported by said spindle; wherein a portion of said rotatable input member is telescopically arranged with a portion of said rotatable output member; wherein pressurized fluid within said closed cavity is forced to pass through said gerotor and enter a low pressure volume of fluid; wherein said power transmission device includes a cap sealingly engaging said housing to enclose said friction clutch and said piston therein; and wherein said cap includes an aperture adapted to receive at least a portion of said spindle and a portion of said output member.