Patents by Inventor Norbert Donath

Norbert Donath 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).

  • Electrode for resistance spot welding of aluminum sheet
    Patent number: 5961854
    Abstract: For welding conductive materials, using conventional copper electrode caps, with a long service life of the welding tool, a foil section is provided between the electrode cap and the surface of the sheet. The foil section is part of a foil strip which is displaceable relative to the electrode cap, and consists of a material with a high nickel content, while silver or a silver metal oxide is provided as a material in the contact area between the electrode cap and the foil section. The electrode cap is preferably coated with this material.
    Type: Grant
    Filed: September 15, 1997
    Date of Patent: October 5, 1999
    Assignee: Bayerische Motoren Werke Aktiengesellschaft
    Inventors: Dietmar Mueller, Nikolaus Gschossmann, Norbert Donath, Franz Schubert