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:
May. 20, 2014
Filed:
Sep. 26, 2008
Applicants:
Carl A. Reiser, Stonington, CT (US);
Paravastu Badrinarayanan, Manchester, CT (US);
Inventors:
Carl A. Reiser, Stonington, CT (US);
Paravastu Badrinarayanan, Manchester, CT (US);
Assignee:
United Technologies Corporation, Hartford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 8/00 (2006.01); H01M 8/24 (2006.01);
U.S. Cl.
CPC ...
Abstract
Fuel cell stacks () include fuel cells () in which internal pressure on membranes (), caused by adjacent cross points () or ribs () of gas flow field plates () is reduced by lowering the axial load holding the stack together, after an initial high axial load, that establishes minimal possible internal resistance, has been held for between a few hours and 20 hours. The need for robust axial load restraints is also reduced. Pressure of cross points () can also be spread by stiffening components or adding stiffeners.