Cathode cover for metal-air cell
Patent 5328777 Issued on July 12, 1994. Estimated Expiration Date: 
July 14, 2012. 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.
July 14, 2012. 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.Patent References 3372060 3801375 3902922 Metal/air cell Case for metal/air electrochemical cells, and cells and lantern batteries thereof Seawater power cell Selective discharge limiting seal for a battery Electronic device having an air regulating battery compartment responsive to electrical load control Patent #: 5093212 InventorsAssigneeApplicationNo. 913287 filed on 07/14/1992US Classes:429/27, Active material electrode-type cell or subcombination thereof429/39, And fluid directing means429/48, PRESERVING CELL IN STORAGE FEATURE429/88Having manifoldExaminersPrimary: Kalafut, StephenAttorney, Agent or FirmForeign Patent References
International ClassH01M 012/06AbstractA cathode cover for a metal-air cell of the type having an air cathode positioned along an external surface of a cell case provides for improved control over exposure of the air cathode to air. The cathode cover allows a sufficient amount of air to the air cathode for an adequate production of power from the cell but limits the amount of air to which the air cathode is exposed so as to prevent premature failure of the cell from flooding, drying out, or contamination. In addition, the cathode cover avoids the problems of point diffusion of oxygen through the air cathode and localized electrolytic reactions. The cathode cover includes a mask member defining a plurality of openings therethrough and forming at least one substantially unobstructed air chamber between the mask member and the air cathode. The mask member includes at least about three of the openings per square inch of the air cathode and the openings provide between about 0.001 and about 0.01 square inches of total open area per square inch of air cathode. In addition, the air chamber has at least about 0.033 cubic inches of unobstructed volume per square inch of the air cathode. |
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