Patents by Inventor Jack Havens

Jack Havens 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).

  • Hardface coating for seal surfaces in a gate valve
    Patent number: 5762089
    Abstract: A gate valve for use in a high pressure line has a movable gate and a static seat within a valve body. The seat has a seat face which is in sliding contact with a gate face. The seat and gate faces are coated with an amorphic coating which hardens when the seat face and gate face are subjected to manufacturing processes or rubbed together during valve opening and closing. A leak resistant seal between the seat and gate faces results when the valve is closed and subjected to high line pressure.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: June 9, 1998
    Assignee: FMC Corporation
    Inventors: Sue F. Haeberle, Christi Hambrick, Jack Havens, Manuel Maligas, Brian Swagerty, John C. Vicic