Diffusion controlled air vent for a metal-air battery

Patent 5691074 Issued on November 25, 1997. Estimated Expiration Date:

October 18, 2015. 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

3072284

3436270

3532548

3600233

3615860

3744516

3871920

3909302

Metal-gas battery with axial reactant gas storage cavity
Patent #: 3975210
Issued on: 08/17/1976
Inventor: Warnock

Metal/air cells and improved air electrodes for use therein
Patent #: 3977901
Issued on: 08/31/1976
Inventor: Buzzelli

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Inventor

Pedicini, Christopher S.

Assignee

AER Energy Resources, Inc.

Application

No. 544707 filed on 10/18/1995

US Classes:

429/27, Active material electrode-type cell or subcombination thereof429/34, Housing member, seal, spacer or fluid distributing or directing means429/82, Venting structure429/83Separate ventilating inlet and exhaust openings

Examiners

Primary: Kalafut, Stephen

Attorney, Agent or Firm

Jones & Askew, LLP

Foreign Patent References

0 294 327 EP. 02/13/1988
1 575 640 FR. 02/13/1969
90 11625 A WO. 02/13/1990

International Class

H01M 012/08

Abstract

A ventilation system for a metal-air battery having a housing for enclosing at least one metal-air cell. The housing has at least one air inlet opening and at least one air outlet opening. A fan is positioned to force air into the air inlet opening and out of the air outlet opening when the fan is turned on. The openings are sized with a length in the direction through the thickness of the housing being greater than a width in the direction perpendicular to the thickness of the housing. The openings are unobstructed and are sized to eliminate substantially the air flow into the air inlet opening and out of the air outlet opening when the fan is turned off.