Patents by Inventor Charles L. Guinnip

Charles L. Guinnip 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).

  • Thread chasing tool
    Patent number: 4630978
    Abstract: A tool for cleaning or repairing the screw threads on studs, bolts and the like comprises inner and outer relatively slidable sleeve members and a series of die elements rockably mounted between the sleeve members adjacent one end or mouth of the tool so as to be urged by relative sliding movement between the members in opposite directions between the expanded position and a contracted position in which inwardly facing thread cutting teeth on the die elements are urged into a thread engaging position with a threaded member inserted into the mouth of the tool.
    Type: Grant
    Filed: October 3, 1985
    Date of Patent: December 23, 1986
    Assignees: Terry L. Keiser, Grant Y. Keiser
    Inventors: Terry L. Keiser, Charles L. Guinnip