Patents by Inventor Torsten-Ulf Kern

Torsten-Ulf Kern 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).

  • Turbine shaft and method for producing a turbine shaft
    Patent number: 6350325
    Abstract: A turbine shaft, in particular for a steam turbine, is oriented along an axis of rotation. The turbine shaft has a first region with a maximum radius R1 and a second region adjoining the first region and having a maximum radius R2>R1. The first region includes a first base material for use at a temperature of over 550° C. and the second region includes a second base material for use at a temperature below 550° C. An alloy steel used for the first and the second base materials in each case has a chromium content of between 8.0% by weight and 12.5% by weight at a substantially identical austenitizing temperature. A method is provided for producing the turbine shaft.
    Type: Grant
    Filed: August 31, 1998
    Date of Patent: February 26, 2002
    Assignee: Siemens Aktiengesellschaft
    Inventors: Jürgen Ewald, Torsten-Ulf Kern