Patents by Inventor Ruediger Ludwig

Ruediger Ludwig 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).

  • Guide bar for a saw chain having a reduced-wear direction-reversing section
    Patent number: 10307930
    Abstract: A guide bar for a saw chain includes an elongate, flat base body made of a basic material. The base body extends along a longitudinal center axis and, in order to guide a saw chain, has a running surface formed on an outer periphery thereof and a guide groove formed in the outer periphery of the base body. The guide groove has a groove base. A direction-reversing section for the saw chain is provided at one end of the base body. The direction-reversing section includes at least one add-on component having a running surface made of more wear-resistant material than the basic material of the base body. The add-on component is secured to the base body of the guide bar by at least one weld seam. The weld seam extends between the add-on component and the base body and is located spatially beneath the groove base.
    Type: Grant
    Filed: August 21, 2014
    Date of Patent: June 4, 2019
    Assignee: Andreas Stihl AG & Co. KG
    Inventors: Alexander Fuchs, Thomas Voigt, David Mitrega, Matthias Schulz, Thomas Lux, Oliver Gerstenberger, Jochen Buchholtz, Berthold Schell, Norbert Apfel, Bernd Hein, Ruediger Ludwig, Jan Foehrenbach