Endless belt power transmission systems or components – Control for variable input to output speed-ratio – Including belt shiftable axially from one to another surface...
Patent
1994-05-09
1995-02-14
Buiz, Michael Powell
Endless belt power transmission systems or components
Control for variable input to output speed-ratio
Including belt shiftable axially from one to another surface...
F16H 900
Patent
active
053890434
ABSTRACT:
A bicycle front derailleur includes a support ring secured to the seat tube of the bicycle frame. The support ring has a side extension on which two links are pivoted. The two links are further pivoted to a chain mover member through which the drive chain extends to be moved thereby. The two links, the side extension and the chain mover member form a parallelogram linkage. One of the links has a sideways lever attached thereto with a control cable secured to the lever so that by pulling the control cable with a manual shifter, the lever rotates the link about the pivot thereof with the side extension so as to move the chain mover member with the coupling of the other pivot thereof to the chain mover member. A biasing spring is disposed between the support ring and the link having the lever thereon to bias the link to an originally-set position. Stroke adjusting screws are provided on the side extension, which screws have an adjustable length relative to the links for adjusting the rotation range of the links and thus the stroke of the chain mover member.
REFERENCES:
patent: 4674995 (1987-06-01), Iwasaki
patent: 4778436 (1988-10-01), Nagano
patent: 5312301 (1994-05-01), Kobayashi
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