Patents by Inventor Tun C. Gist

Tun C. Gist 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).

  • Ring gasket installation tool
    Patent number: 4602893
    Abstract: A method and apparatus are described for the installation and removal of a ring gasket from an underwater wellhead connection. The ring gasket is carried by a ring gasket installation tool from the surface to the underwater wellhead connection by a self-propelled underwater vehicle. Final placement of the ring gasket may be accomplished by selective manipulation of the ring gasket installation tool by the underwater vehicle or by a cable attached to the tool.
    Type: Grant
    Filed: February 19, 1985
    Date of Patent: July 29, 1986
    Assignee: Shell Offshore Inc.
    Inventors: Tun C. Gist, Arthur G. Ahlstone