Patents by Inventor Christoph Hirsch

Christoph Hirsch 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).

  • Gas-cooled, rotating electrical, in particular a turbogenerator,and method of operating such a machine
    Publication number: 20040119346
    Abstract: A gas-cooled, rotating electrical machine, in particular a turbogenerator (1), has a rotatably mounted rotor (4) and a stator (3) concentrically surrounding the rotor (4), the rotor (4) and the stator (3) being accommodated in a housing (2), at least one axial flow fan (5) being arranged at the end face on the rotor (4) in order to cool the machine, this axial flow fan (5) drawing in a gaseous cooling medium from a coaxial suction space (1) and forcing it into a pressure space (11).
    Type: Application
    Filed: May 8, 2003
    Publication date: June 24, 2004
    Inventors: Armin Schleussinger, Juergen Bear, Christoph Hirsch
  • Rotor of a turbogenerator having direct gas cooling incorporating a two-stage flow cascade
    Patent number: 6426574
    Abstract: In an air-cooled electrical machine having reverse cooling in a closed cooling circuit, a two-stage blade cascade for the optimum incident flow of cooling air to the rotor (4) and the rotor winding (29) is provided between a rotor cap plate (22) and a rotor shaft (28). The first blade cascade stage (30b) in the direction of flow is a deceleration cascade having pressure-generating properties, and the following blade cascade stage (30a) in the direction of flow is a deceleration cascade having deflecting properties.
    Type: Grant
    Filed: May 5, 2000
    Date of Patent: July 30, 2002
    Assignee: Alstom
    Inventors: Stephan Hess, Christoph Hirsch, Michael Jung, Johann Schubert, Hans Zimmerman