Patents by Inventor Hans-Wilhelm Bergmann

Hans-Wilhelm Bergmann 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).

  • Method of producing a piston
    Patent number: 6546626
    Abstract: In a method of producing a piston (10) for an internal combustion engine including at least one strengthened piston ring groove at least one relatively narrow groove (14) is configured in the region of the upper and/or lower flank of the provided piston ring groove (18) and the groove (14) is filled with a hard-wearing material (16) and the piston ring groove (18) is worked out such that the upper and/or lower flank is formed at least in part by the hard-wearing material (16).
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: April 15, 2003
    Assignee: Federal-Mogul Nürnberg GmbH
    Inventors: Bernhard Otte, Peter Konrad, Clemens Wallmann, Hans Werner Waldmann, Hans Wilhelm Bergmann
  • Method of producing a piston
    Publication number: 20020069528
    Abstract: In a method of producing a piston (10) for an internal combustion engine including at least one strengthened piston ring groove at least one relatively narrow groove (14) is configured in the region of the upper and/or lower flank of the provided piston ring groove (18) and the groove (14) is filled with a hard-wearing material (16) and the piston ring groove (18) is worked out such that the upper and/or lower flank is formed at least in part by the hard-wearing material (16).
    Type: Application
    Filed: August 15, 2001
    Publication date: June 13, 2002
    Inventors: Bernhard Otte, Peter Konrad, Clemens Wallmann, Hans Werner Waldmann, Hans Wilhelm Bergmann, Gudrun Bergmann
  • Method for the production of a sheet metal part by forming
    Patent number: 6185977
    Abstract: A process of forming a sheet of metal having varying material thickness corresponding to selected strength and/or stiffness requirements generally consisting of varying the degree of heat applied during drawing of the metal to correspondingly vary the elongation coefficient of the sheet across the surface thereof.
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: February 13, 2001
    Assignee: Audi AG
    Inventors: Gerhard Schiessl, Hans-Wilhelm Bergmann