Patent ID: 7520373

Claim:
An electromagnetic friction clutch comprising: a first clutch part and a second clutch part mounted so as to be rotatable relative to each other, the first clutch part having a soft magnetic material defining at least part of a magnetic circuit, the magnetic circuit having a magnetic force for pressing the first and second clutch parts together; and at least one electromagnet being situated in the magnetic circuit to change the magnetic flux in the first and second clutch parts; the magnetic circuit being guided in the first and second clutch parts in such a way that the magnetic flux changes at least ten flux crossover points one after the other in a direction of flow of the magnetic circuit between the first and second clutch parts wherein the first clutch part includes a first clamping jaw and a second clamping jaw movable with respect to each other and the second clutch part is configured as a disk positioned between the first and second clamping jaws.