Patent ID: 6155943
Filing Date: 2000-12-05
Classification: F16H

Abstract:
A roller chain and sprocket drive, comprising:a roller chain having a plurality of pairs of interleaved links, said pairs of links being interconnected by pivot pins, each of said pivot pins containing a roller member freely rotatable about said pins,a sprocket having a plurality of teeth spaced about its periphery, said sprocket including roots located between pairs of adjacent teeth for receiving said rollers,each of said roots having a root radius defined as the distance between the center of said sprocket and the point along said root closest to the sprocket center in the radial direction,at least one of said roots having a first root radius, at least one of said roots having a second root radius, said second root radius being less than said first root radius,said first root radius and said second root radius being defined so that the distance between the centers of adjacent rollers will be substantially equal along said rollers seated in said sprocket roots.