Patents by Inventor Steven E. Crudup

Steven E. Crudup 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).

  • Pump valve
    Patent number: 5052435
    Abstract: A reciprocating pump valve and seat having mating frustoconical seating surfaces in which a resilient sealing insert on the valve is below a rigid disc portion of the valve, with a sealing surface on the insert engageable with the seating surface of the seat radially outwardly from the portion of the seating surface of the seat engageable by the rigid disc portion of the valve.
    Type: Grant
    Filed: August 9, 1990
    Date of Patent: October 1, 1991
    Assignee: Steven E. Crudup
    Inventors: Steven E. Crudup, Emmett T. Roberts