Patents by Inventor W. J. Watkins, II

W. J. Watkins, II 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).

  • Cartridge valve with triple sequential seal
    Patent number: 6105610
    Abstract: A valve includes a valve body including a recess therein, a valve element movably disposed in the recess and a seal member disposed in the recess. The seal member has first, second and third separate and distinct sealing surfaces which are engageable by the valve element in response to fluid pressure in the recess.
    Type: Grant
    Filed: June 15, 1999
    Date of Patent: August 22, 2000
    Assignee: Liquid Metronics Incorporated
    Inventors: W. J. Watkins, II, Enrique L. Kilayko