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:
Apr. 10, 2007
Filed:
Dec. 31, 2003
Deliang Yang, Torrance, CA (US);
Jung S. Yi, Mansfield, CT (US);
Deliang Yang, Torrance, CA (US);
Jung S. Yi, Mansfield, CT (US);
UTC Fuel Cells, LLC, South Windsor, CT (US);
Abstract
A fuel cell includes a membrane electrode assembly () having a first reactant flow field () secured adjacent a first or second surface () of the assembly () for directing flow of a first reactant adjacent the first or second surface of the assembly (). The first reactant flow field () defines a plurality of two-pass circuits (), and each two-pass circuit () is in fluid communication with both a first reactant inlet () for directing the first reactant into the fuel cell (), and with a first reactant outlet () for directing the first reactant out of the fuel cell (). The plurality of two-pass circuits () facilitate water movement () toward the reactant inlet () to aid in passive maintenance of fuel cell () water balance.