Automated bicycle transmission

Details Automated bicycle transmission Automated bicycle transmission

B - Operations, Transporting

62

M

B62M 25/08 (2006.01) B62J 99/00 (2009.01) G01D 21/02 (2006.01) G01P 1/10 (2006.01) B62J 39/00 (2006.01)

Patent

CA 2082724

ABSTRACT An automated bicycle transmission (10) comprises an actuator (17) for movement into predetermined positions of a sprocket change mechanism member (18) moving to engage a chain (19) for transmission of motion opposite a predetermined sprocket among a plurality of coaxial sprockets of different diameter (20). The actuator is controlled by an electronic control device (11) to which is connected a plurality of sensors including a sensor (1) for detection of bicycle speed, a sensor (13) for longitudinal slope or inclination of the bicycle and optionally a sensor (15) of stress transmitted by the cyclist to the pedals. The electronic device (11) compares values detected by the sensors with ranges of preset values corresponding to the various sprockets and controls engagement of the chain with the sprocket having a range of values including said detected values. There can also be provided a sensor (14) of movement of the pedals enabling operation of the actuator (17) only if the cyclist is pedalling.

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