Patents by Inventor Richard H. Crichton, Jr.

Richard H. Crichton, Jr. 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).

  • Safety relief valve
    Patent number: 5046524
    Abstract: A safety relief valve having a disc carrier with a downwardly extending flange which overlaps an adjusting ring located on a valve seat member for providing a quicker full rated lift and shorter blowdown. The downwardly extending flange has a beveled end to form an orifice between the outer peripheral surface of the adjusting ring member for flowing media.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: September 10, 1991
    Assignee: Dresser Industries, Inc.
    Inventor: Richard H. Crichton, Jr.