Patent ID: 8393569

Claim:
A breakable coupling device for coupling together first and second main transmission shafts stationary in translation along a longitudinal axis of rotation of the device, the coupling device comprising: a blocking device having a discontinuous first housing with a series of generally conical openings and a continuous second housing forming a closed loop and offset longitudinally from the series of openings; a compression device; at least one drive device connecting the blocking device and the compression device together in rotation about the longitudinal axis below a predetermined torque, wherein one of the openings of the series of openings of the discontinuous first housing is configured to receive the at least one drive device below the predetermined torque; and a shifting device configured to shift the at least one drive device non-reversibly from the series of openings of the discontinuous first housing towards the continuous second housing when the torque exerted on the at least one drive device is greater than the predetermined torque.