Patents by Inventor Harry E. Keithley

Harry E. Keithley 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).

  • Clamp for presses
    Patent number: 3987681
    Abstract: A clamping device for use on presses has an elongated clamping rod. Exterior threads on one end portion of the rod are threaded into internal threads on a rotatable drive sleeve. Selective driving of the sleeve in opposite directions selectively moves the rod into or out of the sleeve for extending and retracting the rod.
    Type: Grant
    Filed: August 9, 1972
    Date of Patent: October 26, 1976
    Assignee: Gulf & Western Industrial Products Company
    Inventors: Harry E. Keithley, Loren G. Harrington