Patents by Inventor R. Hurley Matthews

R. Hurley Matthews 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).

  • Valve
    Patent number: 4093178
    Abstract: A butterfly type valve is provided with an annular sealing ring disposed in a groove in the bevelled periphery of the circular valve plate. The operating shaft is journalled in a radially disposed external boss and an operating handle having a spring biased locking plunger is secured to the shaft. A locking plate having a plurality of locking apertures is adjustably clamped to the boss for operative engagement with the locking plunger on the handle.
    Type: Grant
    Filed: March 16, 1976
    Date of Patent: June 6, 1978
    Assignee: Humat, Inc.
    Inventors: Robert T. Hughes, R. Hurley Matthews