Patents by Inventor Bruno Böhmer

Bruno Böhmer 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: 6689230
    Abstract: A method of cooling on a cooling bed hot-rolled steel sections from rolling heat, wherein the sections, particularly rails, have section parts of different masses arranged at a distance from each other over the cross-section of the section, and an apparatus for carrying out the method. Initially, the heat quantities to be proportionally removed from the different section parts in dependence on their mass and temperature and the quantity of cooling medium required for this removal are determined and computed by using measuring equipment together with a computing unit by means of a computer program. Subsequently, cooling of the different section parts or their masses is carried out in a controlled manner in such a way that the section parts reach with as little time delay as possible the transformation line Ar3/Ar1 during the decomposition of the gamma-mixed crystal into ferrite and/or pearlite while releasing the transformation heat.
    Type: Grant
    Filed: September 13, 2000
    Date of Patent: February 10, 2004
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Meinert Meyer, Klaus Küppers, Manfred Albedyhl, Bruno Böhmer
  • Patent number: 6315845
    Abstract: A method of straightening rolled sectional steel includes clamping and subsequently cooling at least a sectional steel whose maximum local cross-sectional temperature is below Ar1 and whose minimum local cross-sectional temperature is above a lower limit temperature, wherein already the lower limit temperature produces as a result of clamping a thermal elongation in all fibers of the sectional steel which is greater than the elongation which would be required for a plastification of the fibers which would be subjected to the greatest internal compressive stresses if the sectional steel were exclusively air cooled without clamping.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: November 13, 2001
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Georg Hartung, Lutz Kümmel, Bruno Böhmer, Wolfgang Roloff
  • Patent number: 6170284
    Abstract: An apparatus for the controlled cooling of hot-rolled sections, particularly beams, directly from rolling heat includes cooling sections or zones, wherein, seen with respect to the section to be cooled, a cooling section each is arranged above the section and on both sides of the section and below the section, and the cooling sections can be used individually or in combination, wherein each cooling section is composed of at least one nozzle or a group of interconnected nozzles, and wherein the nozzles can be controlled individually or together.
    Type: Grant
    Filed: December 17, 1998
    Date of Patent: January 9, 2001
    Assignee: SMS Schloemann-Siemag Aktiengesellschaft
    Inventors: Rolf Stodt, Hans-Peter Dr{umlaut over (u)}gh, Holger Behrens, Bruno Böhmer