Patents by Inventor Hermann Tischner

Hermann Tischner 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: 6165288
    Abstract: A chilled casting is characterized by high corrosion resistance in aggressive media and by a wear resistance that approaches that of commercially available types of chilled casting. The disclosed chilled casting contains 36 to 46% by weight Cr, 5 to 12% weight Ni, 2 to 6% by weight Mo, up to 3% by weight Cu, up to 0.2% by weight N, up to 1.5% by weight Si, up to 1.5% by weight Mn and 1.4 to 1.9% by weight C, the remainder being Fe and impurities due to the production process. The chilled casting further contains 20 to 40% by volume austenite, 20 to 40% by volume ferrite and 20 to 40% by volume carbides having a lattice structure.
    Type: Grant
    Filed: November 18, 1996
    Date of Patent: December 26, 2000
    Assignee: KSB Aktienegsellschaft
    Inventors: Anja Dwars, Heinz Koeper, Wolfgang Prechtl, Joerg Schroepfer, Hermann Tischner
  • Patent number: 5795540
    Abstract: A corrosion and wear-resistant chill cast part is formed from an iron composition comprising from 26 to 36 percent Cr; 0 to 10 percent Ni; 2 to 6 percent Mo; 0 to 3 percent Cu; 0 to 0.2 percent N; 0 to 1.5 percent Si; 0 to 1.5 percent Mn; 4 to 9 percent V; and 1.4 to 1.9 percent C. All percents are by weight of the total composition. The remainder of the composition is Fe and impurities.
    Type: Grant
    Filed: September 17, 1996
    Date of Patent: August 18, 1998
    Assignee: KSB Aktiengesellschaft
    Inventors: Anja Dwars, Wolfgang Prechtl, Jorg Schropfer, Hermann Tischner