Patent ID: 6039665
Filing Date: 2000-03-21
Classification: B62M,F16G,F16H,Y10S

Abstract:
A chain and a sprocket cluster in combination for use in a bicycle transmission,wherein the chain comprises:a plurality of intermediate links;a plurality of pairs of outer links;a plurality of fasteners, wherein each fastener connects an end of one of the plurality of intermediate links between a corresponding pair of outer links so that the plurality of intermediate links alternate with the plurality of pairs of outer links;wherein each intermediate link includes a reinforcing rib extending along an intermediate portion thereof between a pair of the plurality of fasteners;wherein each intermediate link defines a longitudinal bottom recess between each end thereof for receiving a sprocket tooth therein, the recess extending between the fasteners at each end of the intermediate link;wherein each pair of outer links comprises first and second outer link plates facing each other, wherein each outer link plate includes a laterally curved middle portion, wherein the laterally curved middle portion of the first outer link plate curves away from the second outer link plate, and wherein the laterally curved middle portion of the second outer link plate curves away from the first outer link plate; andwherein the sprocket cluster comprises:a plurality of sprockets coaxially mounted together, each sprocket including a plurality of teeth for engaging the chain so that a sprocket tooth extends into the recess of each intermediate link engaging the sprocket.