Patents by Inventor Norbert Bietz

Norbert Bietz 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).

  • Screw having an underhead bearing surface including lubricant pockets
    Patent number: 8784030
    Abstract: A screw (2) has a head (5) including an underhead bearing surface (12). Lubricant pockets (13) are arranged at least in a part of the underhead bearing surface (12). The lubricant pockets (13) serve to contain lubricant and to release the lubricant when tightening a screw joint (1) to prevent galling effects during multiple tightening processes.
    Type: Grant
    Filed: January 9, 2013
    Date of Patent: July 22, 2014
    Assignee: KAMAX Holding GmbH & Co. KG
    Inventors: Markus Grobecker, Norbert Bietz, Gunther Hartmann