Patent ID: 7452281

Claim:
A torque transmission device comprising: an input section for receiving a torque from a driving machine; an output section coupled to the driven machine: a bridge section for coupling the input section to the output section to transmit the torque from the input section to the output section, wherein the bridge section is broken when the torque to be transmitted exceeds a predetermined value to interrupt the torque transmission; and a retainer fixed to the input section for coupling the input section to the output section when the bridge section is broken, wherein the input section includes a plurality of projections. which are intermeshed with projections of a pulley, and at least one elastically deformable member is located between the projections of the input section and the projections of the pulley, the output section is coupled to a shaft of the driven machine such that the output section and the shaft rotate together, and the retainer includes a plate extending from the input section and engaging with the output section when the bridge section is broken.