Bicycle rear derailleur
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 10, 1995
Grant Date -
N/A
app pub date -
Nov 10, 1993
filing date -
Mar 23, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
There is provided a bicycle rear derailleur wherein a problem that shifting the chain to a diametrically larger sprocket causes the guide pulley to come too close to the sprocket, which is an inherent problem to a conventional bicycle rear derailleur using a double tension mechanism, is rationally solved with further improved speed change efficiency. This rear derailleur comprises a rearwardly extending control mechanism (23) pivotally supported at a front end portion thereof to a bicycle frame (22) ahead of the multiple sprocket assembly, the control mechanism mounted at a rear end portion thereof with a chain guide (25) rotatably supporting a guide pulley (39) and a tension pulley (40), wherein the control mechanism is urged against the bicycle frame in a clockwise direction about a first lateral shaft (34), and the chain guide is urged against a chain guide mount of the control mechanism in a clockwise direction about a second lateral shaft (41).
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