Patents by Inventor John N. McIntyre

John N. McIntyre 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).

  • Subsea gate valve actuator with external manual override and drift adjustment
    Patent number: 4650151
    Abstract: A hydraulically operated actuator for a sliding gate valve designed for use in a subsea environment. The actuator includes a manual override system that functions independently of the actuator's hydraulic piston and return spring, an externally accessible valve gate drift adjustment, an externally adjustable upstop for the actuator stem, a stem thread assembly that can be manufactured from a material different from the actuator stem to prevent or reduce the possibility of thread galling, a hydraulic control pressure porting system integral with the hydraulic cylinder to minimize space requirements, and a facility for accommodating an optional external electrical stem position indicator package.
    Type: Grant
    Filed: June 18, 1985
    Date of Patent: March 17, 1987
    Assignee: FMC Corporation
    Inventor: John N. McIntyre
  • Fire-resistant gate valve
    Patent number: 4568062
    Abstract: A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat fusible ring assemblies for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and an improved metal-to-metal gate seat.
    Type: Grant
    Filed: March 7, 1983
    Date of Patent: February 4, 1986
    Assignee: FMC Corporation
    Inventors: Alfred P. Regitz, Stephen P. Barrett, Charles E. Jennings, Kendall E. Keene, Bashir M. Koleilat, John N. McIntyre, Ronald L. Riess, Michael R. Williams
  • Valve stem-to-bonnet backseat
    Patent number: 4510960
    Abstract: A stem-operated fire-resistant gate valve including an improved metal-to-metal stem backseat a eutectic ring assembly for facilitating automatic stem backseating at pre-selected temperatures, spring enhancement of the backseating procedure, and a lost motion connection between the valve stem and the valve closure element.
    Type: Grant
    Filed: September 30, 1983
    Date of Patent: April 16, 1985
    Assignee: FMC Corporation
    Inventors: Charles E. Jennings, Claud C. Barrington, Lien-Yan Chen, Bob C. Hopkins, John N. McIntyre, Alfred P. Regitz