Patents by Inventor Karl Leban

Karl Leban 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: 6861161
    Abstract: A composite tool comprising a supporting part of a metallic material having a first composition and a working part of a metallic material having a second composition which is different from the first composition, a process for the manufacture thereof and a method of cutting an austentic alloy article with this composite tool. The supporting part of the composite tool is made of a tenacious iron-based material, and the working part is made of a precipitation harden iron-cobalt-tungsten alloy. The parts are joined by a metallic connection.
    Type: Grant
    Filed: May 30, 2001
    Date of Patent: March 1, 2005
    Assignee: Machner & Saurer GmbH
    Inventors: Helmut Ponemayr, Karl Leban, Manfred Daxel Müller, Herbert Danninger
  • Publication number: 20040101431
    Abstract: The invention relates to a composite tool consisting of a metallic supporting part and at least one such working part of different material compositions, which parts are metallically bonded to each other, in particular, a saw blade or bandsaw. For increasing the cutting yield and tool service life, in particular, when working titanium and titanium alloys, austenitic Cr—Ni—Mn—N steels and nickel and nickel-based alloys, the invention provides that the supporting part or the supporting strip are formed of a tenacious iron-based material and that the working part(s) are formed of a precipitation hardenable iron-cobalt-tungsten alloy (Fe—Co—W).
    Type: Application
    Filed: February 13, 2003
    Publication date: May 27, 2004
    Inventors: Helmut Ponemayr, Karl Leban, Manfred Daxel Muller, Herbert Danninger
  • Patent number: 5641453
    Abstract: The use of a chromium-containing martensitic alloy for plastic molds is described. The use properties of a thermally treated plastic mold of a hardness of at least 45 Rockwell C are improved by an iron-based alloy including, in weight-%,______________________________________ C 0.25 to 1.0, preferably 0.4 to 0.8; N 0.10 to 0.35, preferably 0.12 to 0.29; Cr 14.0 to 25.0, preferably 16.0 to 19.0; Mo 0.5 to 3.0, preferably 0.8 to 1.5; and V 0.04 to 0.4, preferably 0.05 to 0.2, ______________________________________where the sum of the concentration of carbon and nitrogen results in a value of, in weight-%, at least 0.5 and no more than 1.2, preferably at least 0.61 and no more than 0.95, the remainder including iron and melt-related impurities.
    Type: Grant
    Filed: January 16, 1996
    Date of Patent: June 24, 1997
    Assignees: Bohler Edelstahl GmbH, Bohler Ybbstalwerke GmbH
    Inventors: Gerhard Hackl, Karl Leban, Manfred Gstettner
  • Patent number: 5160553
    Abstract: The invention concerns a cold-worked steel of high compressive strength for tools and parts simultaneously subjected to several stresses.The steel of the invention evinces a composition in % by weight ofC: 0.6 to 1.5Si: 0.2 to 1.6Mn: 0.2 to 1.2Cr: 5.0 to 10.0Mo: up to 3.0W: up to 6.0(Mo+2W): 1.0 to 3.0V: 0.3 to 1.5Al: 0.2 to 1.6Nb: up to 0.5N: up to 0.1the remainder being iron and process-entailed contaminations, and it is especially provided for tools and parts comprising an anti-wear layer made at higher temperature.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: November 3, 1992
    Assignee: Bohler Gesellschaft m.b.H.
    Inventors: Karl Leban, Herbert Schweiger
  • Patent number: 5013524
    Abstract: Martensite-hardenable steel, particularly for the production of molds for plastic materials, which consists in weight % of______________________________________ carbon 0.06-0.2 silicon 0.15-0.8 manganese 1.4-3.6 sulfur 0.12-0.4 chromium 0-0.9 nickel 2.8-4.3 vanadium 0.03-0.15 copper 0.1-4.0 aluminum 0.1-4.0 aluminum + copper 0.9-4.1 niobium 0.03-0.12 zirconium 0.01-0.1 calcium 0-0.01 titanium 0.01-0.1 molybdenum 0-1.0 tungsten 0-1.0 Mo + W/2 0-1.5 residue: iron and production impurities.
    Type: Grant
    Filed: April 24, 1990
    Date of Patent: May 7, 1991
    Assignee: Boehler Gesellschaft M.B.H.
    Inventor: Karl Leban