Patents by Inventor Ron D. Williams

Ron D. Williams 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).

  • Patent number: 5833535
    Abstract: An exercise machine for exercising the muscles of the front of the lower leg. The exercise machine includes a frame that supports a seat and a pivot shaft such that a user seated on the seat can rest his heels on the pivot shaft. An exercise arm is fixedly attached to the pivot shaft such that pivoting of the exercise arm causes rotation of the pivot shaft. An exercise bar which is parallel to the pivot shaft is attached to the exercise arm, and is spaced from the pivot shaft such that the user can slide the tops of his feet under the exercise bar with his heels resting on the pivot shaft. A cable and pulley system connect the pivot shaft to a stack of weights to thereby provide resistance to the pivoting of the foot about the heels. A hand lever linked to the pivot shaft raises the arm to allow the user to more easily position the tops of the feet under the bar.
    Type: Grant
    Filed: August 11, 1997
    Date of Patent: November 10, 1998
    Inventor: Ron D. Williams