Patent ID: 9168969
Filing Date: 2015-10-27
Classification: B62K,B62M,F16C,F16H,Y10T

Abstract:
1. A drive system for a bicycle, comprising: a crankset that includes a set of pedals; a first sprocket connected to the crankset and rotatable with revolution of the set of pedals; a second sprocket adapted to drive a wheel of the bicycle; a flexible drive member extending between the first and the second sprockets; an eccentric bottom bracket assembly that is engaged with the crankset, the eccentric bottom bracket assembly including an outer shell having an inner surface and defining an opening; a worm wheel positioned in the opening and connected to the eccentric bottom bracket assembly, wherein the crankset is offset from a center of the worm wheel; and a worm engaged with the worm wheel such that rotation of the worm manipulates a position of the crankset relative to the outer shell thereby adjusting tension in the flexible drive member; wherein the worm wheel includes a removable curvilinear track that is fastened to the circumference of the worm wheel, the worm wheel includes a cylindrical body having an outer surface with a groove formed therein; the track lies in the groove that is engaged with the worm; and the track comprises a plurality of notches formed radially through the track.