Patents by Inventor Rolf A. Ruesse

Rolf A. Ruesse 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).

  • Well pipe hanger with metal sealing annulus valve
    Patent number: 5044432
    Abstract: A well pipe hanger with a metal sealing annulus valve comprising an axially positionable annular metal seal element with a pair of radially spaced annular sealing surfaces that cooperate with annular metallic sealing surfaces on adjacent well elements to establish a metal-to-metal seal between said elements.
    Type: Grant
    Filed: August 10, 1990
    Date of Patent: September 3, 1991
    Assignee: FMC Corporation
    Inventors: Christopher E. Cunningham, Rolf A. Ruesse