Patent ID: 7559416
Filing Date: 2009-07-14
Classification: F16D

Abstract:
1. A bicycle wheel hub assembly comprising: a. a wheel hub formed with a wheel hub shell disposed coaxially about a wheel mounting shaft, whereby said wheel hub shell is journaled for rotation about said wheel mounting shaft and a cylindrical annular hub cavity is defined therebetween, b. an integrally formed power transmission sleeve disposed within said hub cavity and defining a power transmission sleeve outer surface and a cylindrical power transmission sleeve inner surface that is eccentric relative to said power transmission sleeve outer surface, c. a sprocket having sprocket teeth projecting radially relative to a sprocket axis, with a central cylindrical wheel mounting shaft opening defined through said sprocket to receive said wheel mounting shaft coaxially therewithin, d. a drive sleeve projecting from said sprocket axially toward said hub and defining a cylindrical drive sleeve outer surface that is eccentric relative to said drive shaft opening, and said drive sleeve is disposed within said power transmission sleeve, and e. a drag mechanism mounted on said wheel mounting shaft to retard rotation of said power transmission sleeve relative to said drive sleeve.