Patent ID: 8262520

Claim:
A pulley assembly comprising: a first body having a cylindrically-shaped surface to engage a power transmission belt, the first body rotatable around a first axis, a second body in axially overlapping relationship with the first body, the second body movable relative to the first body around the first axis; and a plurality of elastic members, including at least first and second axially spaced elastic members, each extending at least partially around the first axis, the first and second elastic members each having a radially inner portion and a radially outer portion, wherein one of: (a) the radially inner portions of the first and second elastic members; and (b) the radially outer portions of the first and second elastic members are: (i) coupled to move together around the first axis; and (ii) each movable relative to the first and second bodies around the first axis, wherein the other of: (a) the radially inner portions of the first and second elastic members; and (b) the radially outer portions of the first and second elastic members are fixedly coupled one each to the first and second bodies so as to follow movement of the first and second bodies around the first axis.