Patent ID: 8789670

Claim:
A decoupler comprising: an input hub having a rotational axis; a drive member disposed about the hub for rotation about the rotational axis, the drive member having an inner clutch surface; an isolator coupling the hub and the drive member, the isolator comprising a carrier, a plurality of arcuate springs, and a wrap spring, the carrier being received between the input hub and the drive member, the carrier comprising a carrier member and a pair of reaction blocks, the carrier member defining a pair of apertures into which the reaction blocks are mounted, each of the arcuate springs being mounted in the carrier member and being disposed between the input hub and an associated one of the reaction blocks, the wrap spring having a proximal end and a plurality of helical coils, the proximal end having an end face that is abutted against one of the reaction blocks, the helical coils being engaged to the inner clutch surface of the drive member; wherein rotary power is input to the decoupler via the input hub, and wherein rotary power transmitted through the decoupler is transmitted directly from the hub to the arcuate springs.