The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 18, 2008
Filed:
Oct. 29, 2003
Volker Formanski, Wiesbaden, DE;
Peter Kilian, Heidelberg, DE;
Thomas Herbig, Darmstadt, DE;
Marc Becker, Idstein, DE;
Volker Formanski, Wiesbaden, DE;
Peter Kilian, Heidelberg, DE;
Thomas Herbig, Darmstadt, DE;
Marc Becker, Idstein, DE;
General Motors Corporation, Detroit, MI (US);
Abstract
A multi-stage compressor system that compresses air supplied to a cathode of a fuel cell system includes a first stage compressor that compresses inlet air to provide a first pressurized air stream at a first pressure. A second stage compressor includes a compression unit that compresses the first pressurized air stream to a second pressurized air stream at a second pressure. A drive unit drives the compression unit using expansion energy of an exhaust stream of the fuel cell. A first heat exchanger enables heat transfer between the second pressurized air stream and the exhaust stream to heat the exhaust stream.