Bicycle derailleur
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United States of America Patent
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Apr 12, 1994
Grant Date -
N/A
app pub date -
Jan 14, 1993
filing date -
May 17, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
With an object of decreasing the size and weight of a derailleur and a control lever assembly by decreasing a difference in an elastic returning force between a beginning and ending phases of the pantograph link mechanism's deformation, the following technical is provided: The parallelogram pantograph link mechanism (7) is provided with a first and second pivotal members (12, 13) each having a predetermined length and pivoted to a predetermined position of a different constituent member of the parallelogram pantograph link mechanism (7), and respective ends of the first and second pivotal members (12, 13) are mutually connected by a pin for causing the first and second pivotal members (12, 13) to pivot relatively to the members to which they are respectively pivoted when the parallelogram pantograph link mechanism (7) is deformed; and a return spring (15) is provided between the first or second pivotal member (12 or 13) and a selected one of the constituent members of the parallelogram pantograph (15).
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