Patents by Inventor Don W. Eggerton

Don W. Eggerton 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).

  • Fluid valve with actuation sensor
    Patent number: 5144977
    Abstract: Method and apparatus for remotely detecting when a safety relief valve is initially opened includes a permanent field fixedly associated with the closure member and a magnetic proximity switch mounted on the housing so that initial movement of the magnetic field causes the magnetic proximity switch to close, indicating that the valve has opened. Adjustment means are provided to calibrate the position of the sensor switch so that initial movement of the closure member from the seat of less than 0.04 inches can be detected without interfering with the operation of the valve.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: September 8, 1992
    Assignee: Dresser Industries, Inc.
    Inventors: Don W. Eggerton, David J. Scallan