Patent ID: 7074147

Claim:
A sprocket comprising: a hub; a plurality of teeth projecting radially outward from said hub, wherein circumferentially successive teeth are separated from each other respective tooth spaces each at least partially defined by a radiused root surface defined about root arc center; first and second elastomeric cushion rings mounted on said hub and located respectively adjacent opposite first and second axial faces of said teeth, each of said first and second cushion rings defining a plurality of compression pads separated from each other by grooves that extend parallel to a central axis of rotation of said hub, each of said compression pads comprising a planar outer surface defined symmetrically about a circumferential mid-point, wherein said grooves are each radially aligned with one of said tooth spaces so that a radial reference line that passes through said central axis of rotation and any one of said root arc centers also intersects one of said groove.