Patent ID: 7191883

Claim:
A fluid friction coupling, comprising: a drive shaft; a drive disk, wherein the drive disk is rotationally fixed to the drive shaft; an output housing, wherein the output housing is rotatably supported on the drive shaft, wherein the drive disk and the output housing form a working chamber and a reservoir chamber, which between them have a fluid connection for a viscous medium by way of a feed hole and a return duct; an armature base plate; a valve lever; and a steel insert, wherein the steel insert is integral to the output housing and the steel insert is arranged in an area of magnetic flux of an electromagnet; wherein the feed hole is adapted to be controllable via the valve lever with the armature base plate by the electromagnet; wherein the valve lever is arranged between the drive disk and the electromagnet; wherein the armature base plate is arranged in a magnetic flux area of the electromagnet; wherein the valve lever is fixed to the drive disk.