Patent ID: 6726585
Filing Date: 2004-04-27
Classification: B62M,F16H

Abstract:
A variable ratio sprocket assembly for use on a bicycle or other chain drive system requiring multiple gear ratios comprising:an axle providing a center for rotation, coupled to a frame of the bicycle; a bicycle wheel hub coupled to a rear wheel of the bicycle, said bicycle wheel hub being coupled to a receiver; said receiver having a first diameter, said receiver being coupled to said bicycle wheel hub such that rotating said receiver rotates said bicycle wheel; a converter having a second diameter substantially greater than said diameter of said receiver, said converter slidably engaging said receiver, said converter providing a plurality of gear ratios with respect to said receiver, said converter being substantially rotated around said axle; a driver having a third diameter substantially greater than said second diameter of said converter, said driver being slideably engaged by said converter whereby rotating said driver in a first direction rotates said converter in a first direction which in turn rotates said receiver in a first direction; and a sprocket coupled to an exterior surface of said driver, said sprocket being adapted for engaging a drive chain whereby said drive chain rotates said sprocket.