Patent ID: 7686146

Claim:
An apparatus for an engine comprising: an electromagnetic clutch mounted to the engine; a viscous drive mounted to the electromagnetic clutch; an engine cooling fan mounted to a fan shaft, the fan shaft coupled to the viscous drive; a viscous drive case defining a viscous fan drive cavity surrounding the viscous drive; and a coolant case surrounding the viscous drive case and defining a coolant chamber for a coolant therebetween, the coolant chamber also being a viscous heater cavity, the coolant case further comprising: a coolant inlet; a coolant outlet, wherein the coolant inlet permits the coolant into the coolant chamber and the coolant outlet permits coolant out of the coolant chamber; a heater core, wherein the coolant from the coolant outlet flows into the heater core; a drive pulley; a drive pulley shaft upon which the drive pulley rotates, wherein the electromagnetic clutch permits coupling of the drive pulley and the drive pulley shaft to drive the viscous drive, wherein the fan shaft and the drive pulley shaft are non-concentric and serially arranged.