Patent ID: 8672113

Claim:
A wet friction clutch assembly comprising: a housing member having a body, a cover, and a central cavity therein; a pulley member coupled to said housing member, wherein said housing member and pulley member both rotate at input speed; a stationary base member for mounting said housing member on a surface, said base member having a shaft member positioned in said cavity in said housing; a fan member rotatably attached to said housing member; a clutch mechanism positioned in said housing member and adapted to selectively rotate said fan member; a control valve mechanism on said shaft member for modulating the activating oil pressure utilized to selectively activate the clutch mechanism; wherein the rotation of said fan member can be controlled anywhere between minimum and maximum speeds; and at co-axial lubrication oil passageways in said shaft member for routing hot lubrication oil away from said clutch mechanism to a heat exchanger and returning cooler lubrication oil to said clutch mechanism.