Patents by Inventor Richard L. Clark, Jr.

Richard L. Clark, Jr. 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).

  • Patent number: 6030004
    Abstract: A double shouldered high torque resistance threaded connection for drill stem components having enhanced resistance to torque forces, tensile loads and material stress and fatigue is disclosed. The tool joint is provided with threads having a 75.degree. included angle between the thread flanks thereof and with generally elliptical root surfaces to minimize material stress and fatigue during operation under high torque and high tensile loads. When made up, the double intrerengaging shoulders of the threaded tool joint are in firm face to face engagement permitting torque forces and tensile loads to propagate through the tool joint in a manner that minimizes bending forces and minimizes high stress concentration so that the resulting service life of the tool joint is significantly enhanced.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: February 29, 2000
    Assignee: Shaw Industries
    Inventors: William H. Schock, Steven P. Howard, James G. Vogelsang, Richard L. Clark, Jr., Michael D. Rose