Actuator for a bicycle gear-shift

Details Actuator for a bicycle gear-shift Actuator for a bicycle gear-shift

2007-08-14

2007-08-14

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

11416032

ABSTRACT:
A bicycle gear-shift actuator having an articulated quadrilateral support with four connecting rods hinged together by four pin elements, and a motor member, having a variable length output shaft that travels along a drive axis between two opposite pin elements to move them for deforming the articulated quadrilateral. Preferably, the drive axis perfectly intersects the pin axis of at least one of the two pin elements.

REFERENCES:
patent: 5254044 (1993-10-01), Anderson
patent: 5470277 (1995-11-01), Romano
patent: 5480356 (1996-01-01), Campagnolo
patent: 5494307 (1996-02-01), Anderson
patent: 6047230 (2000-04-01), Spencer et al.
patent: 6623389 (2003-09-01), Campagnolo
patent: 6761655 (2004-07-01), Fukuda
patent: 2004/0014541 (2004-01-01), Del Pra
patent: 2004/0063528 (2004-04-01), Campagnolo
patent: DE 39 38 454 (1991-05-01), None
patent: 1 103 456 (2001-05-01), None

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