Patent ID: 7292923
Filing Date: 2007-11-06
Classification: B62M,Y10T

Abstract:
1. A method for electronically servo-assisting an electronically servo-assisted bicycle gearshift, comprising the steps of: a) receiving a signal requesting a displacement of a chain of a bicycle gearshift from a first sprocket to a second adjacent sprocket of a gearshift group comprising at least two sprockets, b1) if the first sprocket has a smaller diameter than the second sprocket, obtaining an upwards gear-shifting position for the second sprocket, b2) if the first sprocket has a larger diameter than the second sprocket, obtaining a downwards gear-shifting position for the second sprocket, and c) driving an actuator of the gearshift group in response to the signal to displace a guide element of the chain in an axial direction with respect to the gearshift group from the first sprocket to the upwards gear-shifting position for the second sprocket or to the downwards gear-shifting position for the second sprocket, respectively.