Patents by Inventor Bernd Duda

Bernd Duda 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).

  • Process for manufacturing hard-soldered aluminum heat exchangers
    Patent number: 5839646
    Abstract: A process for manufacturing hard-soldered aluminum heat exchangers is provided. For heat exchangers which are provided with flat tubes of a narrow interior with, known soldering processing operating with a fluxing agent cannot be used or can only be used with extreme difficulty. For such flat tubes, and optionally for turbulence inserts which can be slid into such flat tubes, certain materials and coatings are provided which result in a soldered connection in the tube interior where, according to the new process, no fluxing agent is used.
    Type: Grant
    Filed: December 23, 1996
    Date of Patent: November 24, 1998
    Assignee: Behr GmbH & Co.
    Inventors: Bernd Duda, Klaus Lorenz, Cord Voelker