Patents by Inventor Steven P. Frohardt

Steven P. Frohardt 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 speed drive
    Patent number: 4260386
    Abstract: A variable ratio, or adjustable ratio, mechanical drive mechanism employs a rotatable driving element the effective diameter of which may be changed. The driving element is segmented to permit effective diameter change by an alteration in the relative position of the segments.Alteration is effected by forcing a change in the separation of the axis of driving element and the point of engagement of the driving element with the driven element.
    Type: Grant
    Filed: May 16, 1979
    Date of Patent: April 7, 1981
    Inventor: Steven P. Frohardt