Patents by Inventor Marion H. Gay

Marion H. Gay 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).

  • Subsurface safety valves and method and apparatus for their operation
    Patent number: 5205355
    Abstract: Method and apparatus for pressurizing the top of the valve member of a subsurface safety to equalized pressure thereacross and assist in opening the valve. The apparatus includes a chamber filled with fluid under pressure which is admitted in to the space between the apparatus and a valve when landed in the valve to pressurized the valve. A spring loaded prong on the apparatus urges the valve member of the safety valve to open position. A latch is included which will bypass a top landing nipple and land in a second landing nipple. The subsurface safety valve is provided with means for filling its spring chamber with liquid with the valve closed. When the safety valve is open the spring chamber is isolated to protect the chamber from flow of fluids and solids.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: April 27, 1993
    Assignee: Otis Engineering Corp.
    Inventors: Marion H. Gay, Phillip S. Sizer, Imre I. Gazda
  • Subsurface safety valves and method and apparatus for their operation
    Patent number: 5170845
    Abstract: Method and apparatus for pressurizing the top of the valve member of a subsurface safety to equalized pressure thereacross and assist in opening the valve. The apparatus includes a chamber filled with fluid under pressure which is admitted in to the space between the apparatus and a valve when landed in the valve to pressurized the valve. A spring loaded prong on the apparatus urges the valve member of the safety valve to open position. A latch is included which will bypass a top landing nipple and land in a second landing nipple. The subsurface safety valve is provided with means for filling its spring chamber with liquid with the valve closed. When the safety valve is open the spring chamber is isolated to protect the chamber from flow of fluids and solids.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: December 15, 1992
    Assignee: Otis Engineering Corp.
    Inventors: Marion H. Gay, Phillip S. Sizer, Imre I. Gazda