Patent ID: 7556134

Claim:
A magnetic friction clutch comprising: at least a first and a second clutch part supported so that the first and the second clutch parts are rotatable relative to each other around an axis of rotation, the first clutch part including at least a first and a second clamping jaw movable toward each other and away from each other, the second clutch part being situated between the first and the second clamping jaws and being disk-shaped, the first and the second clamping jaws pressable against the second clutch part by a magnetic force of a variable magnetic flux carried in the first and the second clutch parts in a soft magnetic material in order to form a frictionally engaged connection between the first and second clutch parts, the second clutch part including a plurality of soft magnetic ring zones permeated by the magnetic flux, the ring zones extending in a circumferential direction and separated from each other in a radial direction by slots running in the circumferential direction, the ring zones adjacent to each other in the radial direction being connected to each other by bridging links, the slots being filled with a hardened casting material connecting the ring zones with each other, and inner and/or outer circumferential surfaces of the ring zones facing each other follow a line deviating from a circular line running concentric to the axis of rotation, and the soft magnetic material of the second clutch part has a layered stack, the layered stack of the second clutch having at least one intermediate layer between two cover layers extending transversely to the axis of rotation, the cover layers and the intermediate layer being different soft magnetic materials.