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:
Feb. 03, 2004
Filed:
Dec. 06, 2001
David Earl Leger, Chilliwack, CA;
Shane Carver Black, Chilliwack, CA;
Mark Chesley Mc Donald, Cultus Lake, CA;
Powerdisc Development Corp. Ltd., Chilliwack, CA;
Abstract
A fuel cell stack comprises fuel cell basic units, each of which including a gas diffuser/collector plate serving as an anode, an ion exchange membrane, disposed on top of the gas diffuser/collector plate and an air diffuser/collector plate serving as a cathode and disposed on top of the ion exchange membrane. The gas diffuser/collector has a face directed to the ion exchange membrane. This face is provided with a flow field incorporating a multiplicity of adjacent open-faced flow channels. Each open-faced flow channel has a cross-section continuously diminishing from its inlet to its outlet. The flow field, viewed from the top, forms a trapezoidal contour.