Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2006-09-12
2006-09-12
Kalafut, Stephen J. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000
Reexamination Certificate
active
07105243
ABSTRACT:
A fuel cell system is provided which includes an off-gas recirculating mechanism working to mix an off-gas discharged from a fuel cell with a hydrogen gas supplied to the fuel cell. The off-gas recirculating mechanism is implemented by an ejector vacuum pump which is controllable of an area of an outlet thereof to bring an output pressure into agreement with a target one. Use of such a type of ejector vacuum pump ensures desired accuracy of recirculation of the off-gas and regulation of the pressure of fuel supplied to the fuel cell.
REFERENCES:
patent: 3585077 (1971-06-01), Waldman
patent: 3982961 (1976-09-01), Grasso
patent: 5441821 (1995-08-01), Merritt et al.
patent: 6447939 (2002-09-01), Iwasaki
patent: 6864003 (2005-03-01), Ueda et al.
patent: 09-213353 (1997-08-01), None
patent: A 9-213353 (1997-08-01), None
patent: A 2001-266922 (2001-09-01), None
Translation of JP 09-213,353 “Detailed Description” section, from the Japanese Patent Office website, (doc date Aug. 1997).
Morishima Shingo
Suzuki Masahiko
Kalafut Stephen J.
Oliff & Berridg,e PLC
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