Patents by Inventor John E. Fain

John E. Fain 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).

  • Accessory for detecting leaking of safety valves
    Patent number: 5323142
    Abstract: An accessory for detecting leaking and flowing conditions in safety valves and safety relief valves utilizes a load sensing device to sense a change in a load on the valve of the safety relief valve caused by a displacement of the valve disc and provides a low-voltage output signal indicating the nature of the load change.
    Type: Grant
    Filed: July 17, 1991
    Date of Patent: June 21, 1994
    Assignee: Dresser Industries, Inc.
    Inventor: John E. Fain