Patents by Inventor Jacobus A. Rumphorst

Jacobus A. Rumphorst 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).

  • Closure plate for hot blast slide valves
    Patent number: 4292993
    Abstract: A closure plate for hot blast slide valves of the type having a hollow ring of box-like cross section cooled by running water to whose inner circumference a body is attached by welding, which is formed by parallel plates and is likewise cooled by running water. The thickness of the body in axial direction is smaller than the axial length of the hollow ring, and the outer surfaces are coated to about the height of the front faces of the ring with refractory concrete, the coating being tied to these outer surfaces by anchoring means.
    Type: Grant
    Filed: November 9, 1979
    Date of Patent: October 6, 1981
    Assignees: Hoogovens Ijmuiden B.V., Zimmermann & Jansen GmbH
    Inventors: Jacob Felthuis, Jacobus A. Rumphorst