Patent ID: 8336692

Claim:
A fan drive comprising: a drive shaft; a fluid friction clutch including: a drive disc and a housing; a bearing for rotatably journalling said housing on said drive shaft; a fan; said fan and said fluid friction clutch being arranged to facilitate a first air flow moving in a flow direction (L) toward said fan and said fluid friction clutch; said housing having a front-end housing part facing toward said first air flow and a rear-end housing part facing away from said first air flow; a blower mounted on said drive shaft so as to rotate therewith and generate a second air flow; an air conveying unit mounted behind said fluid friction clutch in spaced relationship to said rear-end housing part of said housing; and, said air conveying unit and said rear-end housing part of said housing conjointly defining an air passage between said blower and said fan for conducting said second air flow over said rear-end housing part of said housing to remove heat from said clutch.