Patent ID: 8764593

Claim:
A sprocket, comprising: a circular sprocket disc formed with a plurality of teeth and tooth gaps along a circumferential direction; a plurality of sound-damping units mounted to said sprocket disc on at least one side of said sprocket disc for reducing a noise development when a chain runs onto the sprocket, said sound-damping units being separately and individually mounted at a plurality of positions on the at least one side of said sprocket disc along the circumferential direction of said sprocket disc; said sound-damping units including: a mounting base for connection to said sprocket; an elastic body mounted on said mounting base and configured for cushioning a chain running onto the sprocket; a protective cap or a protective coating disposed on said elastic body; circle segments defined by geometric connection lines between a center point of the sprocket and said tooth gaps; said sound damping units being sized for mounting below said tooth gaps and in said circle segments and said sound-damping units being respectively disposed below said tooth gaps or within circle segments and below said teeth.