Patents by Inventor Willie C. Roberson

Willie C. Roberson 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).

  • Unidirectional seat seal for gate valve
    Patent number: 5192051
    Abstract: A gate valve has seat seals located in a cavity between seat rings and a counterbore formed in the flow passage. The seat seals block flow from an inner to an outer direction, but allow flow in the opposite direction. The seat seals are held in position by standoff rings. Flowby passages in the standoff rings assure that the standoff rings will not seal when a surge of test pressure is applied to the seal in a direction opposite to the normal direction that it encounters flow.
    Type: Grant
    Filed: July 30, 1992
    Date of Patent: March 9, 1993
    Assignee: ABB Vetco Gray Inc.
    Inventor: Willie C. Roberson