Fuel cell stack

Patent 6255011 Issued on July 3, 2001. Estimated Expiration Date:

March 1, 2020. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

Laminated fluid flow field assembly for electrochemical fuel cells Patent #: 5300370
Issued on: 04/05/1994
Inventor: Washington, et al.

Inventors

Assignee

Honda Giken Kogyo Kabushiki Kaisha

Application

No. 517535 filed on 03/01/2000

US Classes:

429/32, Plural disc or modules429/34, Housing member, seal, spacer or fluid distributing or directing means429/38, Having support or spacers with fluid distribution means429/39And fluid directing means

Examiners

Primary: Bell, Bruce F.

Attorney, Agent or Firm

Lyon Lyon LLP

Foreign Patent References

6-267564 JP. 09/13/1994

International Class

H01M 008/10

Foreign Application Priority Data

1998-03-02 JP

Abstract

First gas flow passage grooves communicating with a fuel gas inlet and second gas flow passage grooves communicating with a fuel gas outlet are provided on a surface of a first separator. First and second united sections are provided at merged portions of the first gas flow passage grooves and the second gas flow passage grooves. Accordingly, the number of gas flow passage grooves is throttled from the side of the fuel gas inlet to the side of the fuel gas outlet. The turbulence is allowed to occur at the throttled portion to make it possible to improve the gas diffusion performance.