Patents by Inventor Douglass B. Leeth

Douglass B. Leeth 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).

  • Deflection swivel and method
    Patent number: 7165635
    Abstract: A deflectable in-line swivel that permits axial deflection of a tubular string is presented. The in-line swivel is preferably constructed as a ball and socket design whereby the ball of a swivel mandrel is permitted to articulate within a socket of a retainer sub. The system preferably includes a thrust bearing to allow the tensile loads to be carried across the swivel.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: January 23, 2007
    Assignee: Specialty Rental Tool & Supply, LP
    Inventors: Vernon E. Kauffman, Douglass B. Leeth, John A. Lemke, Max H. Smith