Patent Number: 6,293,884

Title: Cluster sprockets for bicycle transmissions and other prime movers

Abstract: This invention comprises a multi-sprocket or cluster gear assembly with a plurality of progressively sized sprockets or gears that are positioned adjacent to each other so as to define an increasing diameter sprocket assembly. Each sprocket comprises a non-circular configuration having at least one long dedendum radius and at least one short dedendum radius, such as an eccentric oval shape. The short radius and the long radius of two adjacent sprockets are aligned and substantially equal in length with each other. The teeth of the sprockets may comprise a chamfer face to better facilitate derailing from one sprocket to the adjacent sprocket. The axial alignment of one sprocket may be retarded by one tooth, relative to the axial alignment of the larger sprocket to better facilitate derailing.

Inventors: Chattin; Jessie R. (Tampa, FL)

Assignee: Chattin Cluster Gears, Inc.

International Classification: B62M 9/00 (20060101); B62M 9/10 (20060101); B62M 9/12 (20060101); F16H 55/30 (20060101); F16H 55/02 (20060101); F16H 9/02 (20060101); F16H 9/24 (20060101); F16H 055/12 (); F16H 055/30 ()

Expiration Date: 09/25/2018