Patents by Inventor Waring F. Hart

Waring F. Hart 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).

  • Method and system for testing safety relief valves
    Patent number: 4893494
    Abstract: A method and system for testing safety relief valves utilizes a reservoir of high pressure fluid which is metered into a smaller pressure vessel in communication with the safety relief valve to be tested. The method and system permits a safety relief valve to be tested with air as well as water.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: January 16, 1990
    Assignee: Management Services International, Inc.
    Inventor: Waring F. Hart