Patents Represented by Attorney Jeffferson Perkins

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  • Rotatable handgrip actuating system
    Patent number: 5476019
    Abstract: A twist grip cable system having a mandrel received over the handlebar of a bicycle and a pulling spool providing increased mechanical advantage which may be used for the full range of rotation or In the case of a variable mechanical advantage system, that is one with a variable radius spool, for only part of the range. To provide even greater mechanical advantage, with the spool complete dropped away, a groove or slot is provided in the mandrel into which the cable may fall.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: December 19, 1995
    Assignee: SRAM Corporation
    Inventors: John D. Cheever, Sam Patterson, Michael W. Larson, Tymme A. Laun