Patents by Inventor Karsten Ledwig

Karsten Ledwig 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).

  • Patent number: 6972159
    Abstract: A fuel-cell system, in particular for a vehicle, has a device for supplying the operating agents for a fuel cell and an electrical energy accumulator. The energy accumulator is composed of a battery and of an intermediate charge store which has a lower internal resistance than the battery. A switch is provided in the electrical connection between the energy accumulator and the fuel cell.
    Type: Grant
    Filed: May 22, 2002
    Date of Patent: December 6, 2005
    Assignee: DaimlerChrysler AG
    Inventors: Rainer Autenrieth, Robert Gerberich, Gerhard Konrad, Karsten Ledwig, Michael Niehues, Markus Walter
  • Patent number: 6646413
    Abstract: A fuel cell system includes a fuel cell unit having an anode side and a cathode side, anode-side feeding and outflow lines for the supply of fuel and removal of anode-side exhaust, and cathode-side feeding and outflow lines for the supply of oxygen and removal of cathode-side exhaust. The fuel cell system also includes means for electrically switching the fuel cell unit on and off depending on the available quantity of fuel.
    Type: Grant
    Filed: November 14, 2001
    Date of Patent: November 11, 2003
    Assignee: DaimlerChrysler AG
    Inventors: Rainer Autenrieth, Gerhard Konrad, Karsten Ledwig, Michael Niehues, Markus Walter
  • Publication number: 20020182454
    Abstract: A fuel-cell system, in particular for a vehicle, has a device for supplying the operating agents for a fuel cell and an electrical energy accumulator. The energy accumulator is composed of a battery and of an intermediate charge store which has a lower internal resistance than the battery. A switch is provided in the electrical connection between the energy accumulator and the fuel cell.
    Type: Application
    Filed: May 22, 2002
    Publication date: December 5, 2002
    Applicant: DaimlerChrysler AG
    Inventors: Rainer Autenrieth, Robert Gerberich, Gerhard Konrad, Karsten Ledwig, Michael Niehues, Markus Walter
  • Publication number: 20020057066
    Abstract: A fuel cell system includes a fuel cell unit having an anode side and a cathode side, anode-side feeding and outflow lines for the supply of fuel and removal of anode-side exhaust, and cathode-side feeding and outflow lines for the supply of oxygen and removal of cathode-side exhaust. The fuel cell system also includes means for electrically switching the fuel cell unit on and off depending on the available quantity of fuel.
    Type: Application
    Filed: November 14, 2001
    Publication date: May 16, 2002
    Inventors: Rainer Autenrieth, Gerhard Konrad, Karsten Ledwig, Michael Niehues, Markus Walter