Patents by Inventor Johann Friederich Jaeggi

Johann Friederich Jaeggi 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).

  • Steering rack manufacture
    Patent number: 8033154
    Abstract: A die apparatus and method for performing a flashless forging operation to manufacture the toothed portion of a steering rack. The die apparatus includes first and second die members and at least one punch member, each having a forming surface shaped substantially as an obverse of a portion of the toothed portion. At least a portion of the forming surface of the first die member is shaped substantially as the obverse of the teeth of the rack. The first and second die members are moveable towards each other to a closed position, thereby partially forging the toothed portion from a blank placed in the die apparatus, and forming a substantially closed cavity defined by the forming surfaces. The punch member is adapted to move into the cavity once the die members are in the closed position, thereby completing the forging operation.
    Type: Grant
    Filed: November 30, 2010
    Date of Patent: October 11, 2011
    Assignee: Bishop Innovation Limited
    Inventors: Juergen Dohmann, Johann Friederich Jaeggi, Lyle John McLean
  • STEERING RACK MANUFACTURE
    Publication number: 20110067477
    Abstract: A die apparatus and method for performing a flashless forging operation to manufacture the toothed portion of a steering rack. The die apparatus includes first and second die members and at least one punch member, each having a forming surface shaped substantially as an obverse of a portion of the toothed portion. At least a portion of the forming surface of the first die member is shaped substantially as the obverse of the teeth of the rack. The first and second die members are moveable towards each other to a closed position, thereby partially forging the toothed portion from a blank placed in the die apparatus, and forming a substantially closed cavity defined by the forming surfaces. The punch member is adapted to move into the cavity once the die members are in the closed position, thereby completing the forging operation.
    Type: Application
    Filed: November 30, 2010
    Publication date: March 24, 2011
    Inventors: Juergen DOHMANN, Johann Friederich Jaeggi, Lyle John McLean
  • Steering rack manufacture
    Patent number: 7886567
    Abstract: A die apparatus and method for performing a flashless forging operation to manufacture the toothed portion of a steering rack. The die apparatus includes first and second die members and at least one punch member, each having a forming surface shaped substantially as the obverse of a portion of the toothed portion. At least a portion of the forming surface of the first die member is shaped substantially as the obverse of the teeth of the rack. The first and second die members are moveable towards each other to a closed position, thereby partially forging the toothed portion from a blank placed in the die apparatus, and forming a substantially closed cavity defined by the forming surfaces. The punch member is adapted to move into the cavity once the die members are in the closed position, thereby completing the forging operation.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: February 15, 2011
    Assignee: Bishop Innovation Limited
    Inventors: Juergen Dohmann, Johann Friederich Jaeggi, Lyle John McLean