Patents by Inventor William F. Geisler

William F. Geisler 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).

  • Combination ball valve and annular pipe seal
    Patent number: 5167283
    Abstract: A diverter for a riser string between subsea well and offshore drilling rig utilizes a rotatable ball element. The ball element mounts in a tubular housing. The ball element has a passage through it which is coaxial with the riser when the ball element is in one position. A drive motor will rotate the ball element 90 degrees to place the ball element passage perpendicular to the riser passage to block flow. A pipe sealing member locates in the passage of the ball element. Hydraulic fluid pressure applied to the pipe sealing element will causes the pipe sealing element to seal around pipe.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: December 1, 1992
    Assignee: ABB Vetco Gray Inc.
    Inventors: John D. Smith, William F. Geisler