Patents by Inventor David W. Gent

David W. Gent 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).

  • Rotary valve
    Patent number: 5695170
    Abstract: There is disclosed a butterfly valve having a body connectable in a flowline and a seat which lines its inner side, and a disc which has stem portions at its opposite ends closely received within openings in the seat and body to permit the disc to be rotated between opened and closed positions. A ring which is restrained from movement with one of the disc and seat in a direction transverse to the stem portions substantially fills a groove in the other of the disc and seat which surrounds each stem portions so as to seal between the seat, disc and such stem portion.
    Type: Grant
    Filed: February 8, 1996
    Date of Patent: December 9, 1997
    Assignee: Bray International, Inc.
    Inventors: John R. Dernovsek, David W. Gent