Patents by Inventor Garfield Clark

Garfield Clark 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).

  • Self draining valve
    Patent number: 4974637
    Abstract: A self draining valve having a valve housing with a fluid entrance channel, a fluid exit passageway leading toward the direction of normal flow of fluid, and a fluid drain channel leading in a direction inconsistent with the normal flow of fluid; a cylindrical inner valve member rotatably positioned within the valve housing; and two continuous o-ring type seals positioned between the inner surface of the valve housing, and the outer surface of the inner valve member.
    Type: Grant
    Filed: October 10, 1989
    Date of Patent: December 4, 1990
    Inventor: Garfield Clark