Patents by Inventor Viktor Pfeffeer

Viktor Pfeffeer 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 and apparatus for two-stage supercharging of process air for a fuel cell
    Patent number: 6662566
    Abstract: In a process and apparatus for two-stage supercharging of process air for a fuel cell, in one of the two charging stages, supercharging taking place by means of a displacement machine. In the other charging stage, supercharging is performed by means of a combined expansion and compression machine. Energy is recovered from the exhaust gas of a fuel cell by means of the combined expansion and compression machine.
    Type: Grant
    Filed: January 18, 2002
    Date of Patent: December 16, 2003
    Assignee: Ballard Power Systems Inc.
    Inventors: Falko Berg, Robert Geiser, Michael Kising, Viktor Pfeffeer, Goetz Von Esebeck, Friedrich Wirbeleit
  • Process and apparatus for two-stage supercharging of process air for a fuel cell
    Publication number: 20020064696
    Abstract: In a process and apparatus for two-stage supercharging of process air for a fuel cell, in one of the two charging stages, supercharging taking place by means of a displacement machine. In the other charging stage, supercharging is performed by means of a combined expansion and compression machine. Energy is recovered from the exhaust gas of a fuel cell by means of the combined expansion and compression machine.
    Type: Application
    Filed: January 18, 2002
    Publication date: May 30, 2002
    Applicant: DaimlerChrysler AG.
    Inventors: Falko Berg, Robert Geiser, Michael Kising, Viktor Pfeffeer, Goetz Von Esebeck, Friedrich Wirbeleit
  • Process and apparatus for two-stage supercharging of process air for a fuel cell
    Patent number: 6349535
    Abstract: In a process and apparatus for two-stage supercharging of process air for a fuel cell, in one of the two charging stages, supercharging taking place by means of a displacement machine. In the other charging stage, supercharging is performed by means of a combined expansion and compression machine. Energy is recovered from the exhaust gas of a fuel cell by means of the combined expansion and compression machine.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: February 26, 2002
    Assignee: DaimlerChrysler AG
    Inventors: Falko Berg, Robert Geiser, Michael Kising, Viktor Pfeffeer, Goetz von Esebeck, Friedrich Wirbeleit