Continuously Variable Transmission For A Bicycle

Abstract: A continuously variable transmission for a bicycle is provided that improves the functionality of the bicycle and increases the reliability and longevity of the transmission. The transmission is continuously variable among a potentially infinite number of speed ratios allowing a user to select the proper speed ratio based on the operating conditions, the motion of the bicycle, and any other considerations from the user. A driver assembly reduces the torque from a crankshaft to a set of sheaves and a belt to improve the reliability and longevity of the components of the transmission that set the speed ratio. Moreover, a position motor simply and precisely controls the speed ratio by controlling the relative positioning between sheaves. A driven assembly increases torque for output to a drive wheel, which propels the bicycle.

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