Front derailleur
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 15, 1992
Grant Date -
N/A
app pub date -
Nov 8, 1990
filing date -
Nov 14, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A front derailleur is provided with a first pressing portion having an arc substantially coaxial with the front gears and including a first pressing point where a pressing operation of the chain engaging the small gear is started and a second pressing point where the shifting operation of the chain mounting the intermediate gear is completed when the chain is shifted from the small gear to the intermediate gear. The derailleur is further provided with a second pressing portion positioned radially outwardly of the front gears relative to the first pressing portion for pressing the chain when shifting from the intermediate gear to the large gear. A speed change subsidiary portion is provided between the first pressing portion and the second pressing portion for shifting a pressing operating position from the first pressing portion to the second pressing portion as the shifting operation of the chain proceeds in the second speed change operation, and allowing the chain to incline relative to the front gear in plan view.
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