Patents by Inventor Hans-Juergen Ehrenberg

Hans-Juergen Ehrenberg 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).

  • Patent number: 5314099
    Abstract: An immersion nozzle (2) for metallurgical recipients, in particular for a reservoir arranged upstream of a continuous casting ingot mould, has an interchangeable discharge pipe (2) which can be attached in a leakproof manner on or in a perforated brick (1). To improve the flow conditions and hence the efficiency of the casting, the inlet side of the nozzle comprises an upper elongated section (12) in the form of a tubular shaft (11) which expands conically downward to a given plane and which is narrow in a plane perpendicular to the given plane. A second elongate section (13) ends in an elongated transverse flow section of given dimensions.
    Type: Grant
    Filed: September 19, 1989
    Date of Patent: May 24, 1994
    Assignee: Mannesmann AG
    Inventors: Hans Butz, Gerd Diederich, Hans-Juergen Ehrenberg, Dietmar Lohse, Lothar Parschat, Fritz-Peter Pleschiutschnigg
  • Patent number: 4976306
    Abstract: A method for continuous casting metal products under utilization of a mold and pouring molten metal into the mold to obtain a flat stock with a thickness below 100 mm, includes withdrawing the partially solidified casting by at least one roll pair which reduce the thickness of the stock upstream from complete solidification by at least 10% but not more than 70% while further reduction in thickness by at least 30% obtains downstream from complete solidification is improved by requiring that the product being cast has a thickness not below 50 mm; that exclusively internally cooled rollers are used for obtaining the reduction; and that the thickness is reduced downstream from the complete solidification at a point where the temperature is only little below the solidus temperature particularly in the case of steel being a temperature between 1500 and 1200 degrees C.
    Type: Grant
    Filed: May 9, 1989
    Date of Patent: December 11, 1990
    Assignee: Mannesmann AG
    Inventors: Fritz-Peter Pleschiutschnigg, Lothar Parschat, Armin Burau, Werner Rahmfeld, Gerd Moellers, Hans-Juergen Ehrenberg, Hans G. Eberhardt
  • Patent number: 4928747
    Abstract: Seen against the direction of casting, the narrow width dimension of a mold is widened through appropriate surface contour, at least in the mold center, to facilitate charging of the mold whereby the lower portions of the longitudinal walls of the mold are essentially parallely curved while in the upper portion at least one of the walls tangentially merges into the pour-in portion of the mold.
    Type: Grant
    Filed: June 21, 1988
    Date of Patent: May 29, 1990
    Assignee: Mannesmann AG
    Inventors: Fritz-Peter Pleschiutschnigg, Gerd Moellers, Hans-Georg Eberhardt, Werner Rahmfeld, Lothar Parschat, Hans-Juergen Ehrenberg