Patents by Inventor William G. Chunn

William G. Chunn 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).

  • Method of internally and externally upsetting the end of a metal tube
    Patent number: 5184495
    Abstract: A method is disclosed of externally and internally upsetting the end of a steel tube to provide a thicker wall for welding to a tool joint and for providing an internal tapered section having a projected length (Miu) along the longitudinal axis of the tube that substantially exceeds today's API standard upset. The method includes three upsetting steps, one pressing step, and one reheating step after the first two steps of the method.
    Type: Grant
    Filed: December 3, 1991
    Date of Patent: February 9, 1993
    Assignee: Prideco, Inc.
    Inventors: William G. Chunn, Ralph T. Moore