Patents by Inventor Paul L. Hill

Paul L. Hill 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).

  • Sliding gate valve
    Patent number: 5582391
    Abstract: The invention relates to a sliding gate valve for controlling the flow of molten metal from a vessel. The valve comprises an orificed fixed plate and an orificed sliding plate slidingly mounted on a hinged support sub-assembly. The sliding plate is biased into face to face contact with the fixed plate. The biasing means applies the biasing force directly on to the contact plane defined by the meeting faces of the two plates.
    Type: Grant
    Filed: June 5, 1995
    Date of Patent: December 10, 1996
    Assignee: Flogates Limited
    Inventors: Ian McNair, Paul L. Hill
  • Teeming apparatus and method
    Patent number: 4641768
    Abstract: A molten metal teeming valve of the sliding gate type is equipped with means for the injection of gas for various purposes including refractory preheating, lancing, or cooling, etc. The gas injecting apparatus is arranged within the valve organization in a manner that will prevent impingement of the injected gas streams on the refractory valve elements thereby avoiding damage to such elements.
    Type: Grant
    Filed: April 2, 1985
    Date of Patent: February 10, 1987
    Assignee: USS Engineers and Consultants, Inc.
    Inventor: Paul L. Hill