Patent ID: 6761256
Filing Date: 2004-07-13
Classification: F16D

Abstract:
A clutch arrangement for rapid disengagement of two elements in a transmission system when a chosen torque is exceeded, comprising a conical shaft end that carries a corresponding sleeve which, in turn, carries externally at its axial ends two mutually spaced ball bearings with a force transmission ring disposed therebetween, an annular force transmission body that surrounds and is carried by said ball bearings and includes a pressurisable hydraulic chamber which, when pressurised through a valve on said body, causes an inner surface diameter of the body to decrease so as to attain force transmitting engagement with an outer surface of the ring, and said sleeve carrying a dogging element which is adapted to act on an element carried by the body for relieving the hydraulic chamber of pressure upon relative rotation between the body and the sleeve, said ring and said body being adapted to pass free from each other when the hydraulic chamber is depressurised, and said ring being connected operatively with the sleeve so that relative rotation will take place between the ring and the body when the chosen torque is exceeded.