Patent ID: 7475764

Claim:
A device for driving a coolant pump for the coolant circuit of an internal combustion engine for a motor vehicle, the device comprising a drive train having a drive wheel, a first clutch comprising a fluid friction clutch and a drive shaft for driving the coolant pump, the device comprising: a) a second clutch which comprises an electromagnetic clutch and which is connected into the drive train parallel to the fluid friction clutch, b) the drive wheel which comprises a pulley with a web, and wherein c) the fluid friction clutch and the electromagnetic clutch each comprise a driving disk which can be driven by the pulley, d) the fluid friction clutch and the electromagnetic clutch are arranged on opposite sides of the web and the driving disks are fastened on the drive shaft, and e) the drive shaft is mounted rotatably in a bearing housing which comprises a coolant pump impeller fastened to a driven end of the drive shaft and the driving disks fastened to a driving end of the drive shaft.