Patent ID: 8857591

Claim:
A torque-limited coupling comprising: an input and output rotatably mounted about a common rotational axis; at least one connection which interconnects the input and output in a first position to be rotationally linked to transmit torque and upon exceeding a predeterminable torque limit the at least one connection moves from the first position to a second position at which the input and output are rotatable relative to one another; the at least one connection in the first position is either indirectly or directly connected with a displacement body which is moveably mounted within a chamber filled with a magnetorheological fluid, the position of the displacement body within the chamber being determined by holding force generated by the magnetorheological fluid; a magnetic field generator for providing a variable magnetic field coupled to the magnetorheological fluid and which is provided from the displacement body or a housing of the chamber for adjusting the holding force; and wherein upon exceeding of the torque limit, the displacement body moves within the chamber against the holding force provided by the magnetorheological fluid.