Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2006-08-08
2006-08-08
Ryan, Patrick Joseph (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000, C429S010000
Reexamination Certificate
active
07087334
ABSTRACT:
The present invention relates to a fuel cell operation method in which a fuel cell11that generates power using hydrogen gas and oxidant gas as reaction gas is operated at an operating pressure that corresponds to a required power generation state. A hydrogen sensor54that detects hydrogen density is provided in a vicinity of the fuel cell11, and based on values detected by the hydrogen sensor54and on the amount of hydrogen leakage at the current operating pressure and on the characteristics of the fuel cell11, an operating pressure is predicted at which the hydrogen leakage amount from the fuel cell will not exceed a predetermined value, and the fuel cell11is operated while limiting the operating pressure to below the predicted operating pressure.
REFERENCES:
patent: 3748180 (1973-07-01), Clausi
patent: 6280869 (2001-08-01), Chen
patent: 2003/0022037 (2003-01-01), Parr et al.
Nakajima Nobutaka
Sugino Takuya
Suzuki Jun
Honda Giken Kogyo Kabushiki Kaisha
Lahive & Cockfield LLP
Laurentano, Esq. Anthony A.
Lewis Ben
Ryan Patrick Joseph
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