Patent ID: 7357236
Filing Date: 2008-04-15
Classification: F16H

Abstract:
1. A hydraulic torque coupling assembly comprising: a coupling housing; a hollow casing rotatably supported within said coupling housing; at least one output shaft axially outwardly extending from said casing; at least one hydraulically operated selectively engageable friction clutch assembly for operatively coupling said casing and at least one output shaft; at least one hydraulic clutch actuator for selectively frictionally loading said at least one friction clutch assembly, said actuator comprising: said variable pressure relief valve assembly includes a valve closure member, a valve seat complementary to said valve closure member and an electro-magnetic actuator for engaging said valve closure member and urging thereof against said valve seat so as to selectively vary a release pressure of said pressure relief valve assembly based on a magnitude of an electric current supplied to said electro-magnetic actuator; wherein said electro-magnetic actuator is mounted to said coupling housing to be independently supported thereby.