Patents by Inventor Mark A. Amey

Mark A. Amey has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Variable length crank arm
    Patent number: 5636554
    Abstract: A variable length crank arm assembly for transferring energy to the power train of a bicycle, the assembly including a primary crank arm attached to a secondary crank arm by a rotatable coupling. The rotatable coupling enables the secondary crank arm to be rotated to extended and retracted positions during the power and unloading strokes of a pedal cycle. The variable length crank arm is biased to impart a continuous force to rotate the secondary crank arm toward its retracted position, and a stop limits the rotation of the secondary crank arm to establish the extended and retracted positions.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: June 10, 1997
    Inventor: Mark A. Amey