Patents by Inventor Ralph Felder

Ralph Felder 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).

  • Sucker rod adjustment tool
    Patent number: 4022430
    Abstract: Disclosed is a sucker rod adjustment tool which enables the adjustment of effective sucker rod length for pumps used in oil wells, to be made in an efficient and timely manner. The tool consists of two cable slings from which two hydraulic servos are suspended and a lifting collar is attached at the lower ends of the hydraulic servos; all so arranged as to lift the sucker rod through its supporting member to allow adjustment when the hydraulic servos are retracted.
    Type: Grant
    Filed: August 19, 1976
    Date of Patent: May 10, 1977
    Inventors: Donald Wayne Felder, Ralph Felder, Orville Monroe