Patent ID: 7931552

Claim:
A pulley assembly for use in an automobile accessory drive system, the pulley assembly comprising: a shaft engaging member including a bore for receiving an accessory input shaft for engagement therewith; a pulley member including a bore receiving an axially extending shaft of the shaft engaging member, the pulley member including a first coupling surface and a peripheral belt-engaging surface; and a shaft extension member threadably connected to the shaft engaging member that transfers torque between the pulley member and the shaft engaging member, the shaft extension member including a second coupling surface facing the first coupling surface; wherein the first and second coupling surfaces couple together when torque applied to the shaft extension member is in a first direction such that the shaft extension member and the shaft engaging member rotate with the pulley member; wherein the first and second coupling surfaces decouple when torque applied to the shaft extension member is in a second direction opposite the first direction such that the shaft engaging member rotates relative to the pulley member.