Patents by Inventor Stefan Birkner

Stefan Birkner 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).

  • Non-magnetizable rolling bearing component of an austenitic material and method of making such a rolling bearing component
    Patent number: 8950947
    Abstract: A non-magnetizable rolling bearing component made of an austenitic material and comprising a hardened surface layer wherein the component of the invention is a material used for making the component contains manganese and a method for making such a rolling bearing component wherein the surface-proximate layer of the material of the rolling bearing component contains an admixture of manganese, is carburized at an elevated temperature in an oxygen-rich atmosphere and the rolling bearing component is then cooled.
    Type: Grant
    Filed: February 6, 2009
    Date of Patent: February 10, 2015
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Ernst Strian, Stefan Birkner, Ralf Winter, Julia (Amberger) Hermann
  • Non-magnetizable rolling bearing component of an austenitic material and method of making such a rolling bearing component
    Publication number: 20090202187
    Abstract: A non-magnetizable rolling bearing component made of an austenitic material and comprising a hardened surface layer wherein the component of the invention is a material used for making the component contains manganese and a method for making such a rolling bearing component wherein the surface-proximate layer of the material of the rolling bearing component contains an admixture of manganese, is carburized at an elevated temperature in an oxygen-rich atmosphere and the rolling bearing component is then cooled.
    Type: Application
    Filed: February 6, 2009
    Publication date: August 13, 2009
    Inventors: Ernst Strian, Stefan Birkner, Ralf Winter, Julia (Amberger) Hermann
  • Component made of an aluminium silicon cast alloy
    Patent number: 6040059
    Abstract: A component (17) made of an aluminum silicon cast alloy whose surface is at least partly subjected to an anodic treatment to produce an oxide layer, which component comprises, prior to the anodic treatment, a surface-proximate deformation zone (4) configured as a homogeneous zone in which the silicon is uniformly distributed in the .alpha.-mixed crystal (1) and due to this homogeneous mixing of aluminum and silicon, the differing electric conductivities of the original structural constituents (.alpha.-mixed crystal, eutectic) are replaced by a uniform electric conductivity so that uniform oxide layers can grow during the anodizing process.
    Type: Grant
    Filed: November 9, 1998
    Date of Patent: March 21, 2000
    Assignee: LuK GmbH & Co.
    Inventors: Stefan Birkner, Ernst Strian, Markus Kreibiehl