Torque-limiting clutch comprising a release trigger mechanism

A clutch for a rotary shaft, said clutch comprising an annular chamber, a housing and a thin-walled sleeve forming an axially extended thin wall of the annular chamber, the chamber being arranged to be supplied with a pressurized fluid for substantially elastic deformation of the sleeve, so that a surface of the sleeve engages a smooth complementary shaped surface so that the shaft is drivingly connected to the clutch, the clutch further comprising a trigger device and a channel system activatable by said trigger device upon a relative angular movement between the shaft and the housing, the chamber being connected to said channel system and the channel system being arranged to, when it is activated by said trigger device, assume a state in which the pressurized fluid can flow through the channel system away from the chamber, so that the shaft can rotate independently of the housing, wherein the clutch further comprises a control means arranged to receive said fluid flowing through the channel system away from the chamber, and also comprising a pump in turn arranged to pump fluid to the chamber so as to achieve said pressure therein, wherein the control means is fixedly arranged in relation to the housing, so that the control means is arranged to rotate with the shaft, wherein the clutch further comprises a generator means arranged to harvest electric energy from the rotation of the shaft, and wherein the generator means is arranged to power the control means.