Bicycle shift control apparatus with preferential shifting

Details Bicycle shift control apparatus with preferential shifting Bicycle shift control apparatus with preferential shifting

2007-10-30

2007-10-30

Johnson, Vicky A. (Department: 3682)

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

Including belt shiftable axially from one to another surface...

Reexamination Certificate

active

10708264

ABSTRACT:
A shift control apparatus is provided for a bicycle that has a front transmission and a rear transmission, wherein each transmission has a plurality of gear steps. The apparatus comprises a travel condition sensing unit and a control unit that operates one of the front transmission and the rear transmission in priority to the other one of the front transmission and the rear transmission based on the travel condition.

REFERENCES:
patent: 5213548 (1993-05-01), Colbert et al.
patent: 5261858 (1993-11-01), Browning
patent: 5551315 (1996-09-01), Pikoulas
patent: 5577969 (1996-11-01), Watarai
patent: 5865454 (1999-02-01), Campagnolo
patent: 5970816 (1999-10-01), Savard
patent: 6047230 (2000-04-01), Spencer et al.
patent: 6959941 (2005-11-01), Takeda et al.
patent: 7061228 (2006-06-01), Ichida et al.
European search report for EP 04004212.9, the European patent application that corresponds to this application, dated May 9, 2007.

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