Patents by Inventor Gerald R. Kendall

Gerald R. Kendall 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).

  • Leg exerciser
    Patent number: 5391130
    Abstract: An exercise apparatus is used for leg exercises, and particularly for exercising the muscles used in ice skating. The apparatus has a frame with two four bar linkages arranged side by side. Each linkage carries a foot pad. A resistance unit is attached to each linkage to resist movement of the linkage in both directions. The resistance unit is preferably a double acting hydraulic cylinder connected to variable flow control valves to vary the resistance to linkage movement.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: February 21, 1995
    Inventors: Edward J. Green, Gerald R. Kendall, Mark Lumbard, Arvind Naran