Patent ID: 7914408

Claim:
A cushion ring sprocket assembly comprising: a sprocket body comprising a plurality of teeth arranged in a row, first and second opposite axial tooth faces, first and second hubs extending axially outward relative to the first and second tooth faces, said first and second hubs including respective cylindrical outside diameters; first and second sets of metal cushion rings captured on said first and second hubs, respectively; said first set of cushion rings comprising at least a first inner cushion ring including an inside diameter eccentrically located on said cylindrical outside diameter of said first hub and a first outer cushion ring including an inside diameter eccentrically located on an outside diameter of the first inner cushion ring; said second set of cushion rings comprising at least a second inner cushion ring including an inside diameter eccentrically located on said cylindrical outside diameter of said second hub and a second outer cushion ring including an inside diameter eccentrically located on an outside diameter of the second inner cushion ring, wherein said first and second inner cushion rings include respective inside diameters that are larger than and located eccentrically relative to the respective cylindrical outside diameters of the first and second hubs, and wherein said first and second outer cushion rings include respective inside diameters that are larger than and located eccentrically relative to the respective outside diameters of the first and second inner cushion rings, said outside diameters of the first and second outer cushion rings are adapted to be contacted and deflected by link plates of an associated chain that meshes with said teeth of said sprocket; first and second retaining devices connected to the first and second hubs to capture the first and second sets of cushion rings on the first and second hubs, respectively.