Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature
Reexamination Certificate
2005-08-09
2005-08-09
Tsang-Foster, Susy (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
Having magnetic field feature
C429S006000
Reexamination Certificate
active
06926980
ABSTRACT:
A system and method for draining remaining water in a gas passage of a fuel cell, which has a simple structure and the remaining can be efficiently and reliably drained outside. Water which remains in a gas passage of the fuel cell is first drained by increasing the flow rate of the reaction gas while the operation of the fuel cell is stopped. The remaining water which has not been drained is then drained by increasing the pressure of the reaction gas and then decreasing the increased pressure. The increase and decrease operation of the pressure of the reaction gas is started after the increase of the flow rate of the reaction gas is started. Typically, the increase of the pressure of the reaction gas is started when a predetermined time has elapsed after the increase of the flow rate of the reaction gas is started.
REFERENCES:
patent: 5798186 (1998-08-01), Fletcher et al.
patent: 6475655 (2002-11-01), Nakanishi et al.
patent: 6479177 (2002-11-01), Roberts et al.
patent: WO 97/48142 (1997-12-01), None
Hayashi Katsumi
Kato Hideo
Uoshima Minoru
Honda Giken Kogyo Kabushiki Kaisha
Lahive & Cockfield LLP
Laurentano, Esq. Anthony A.
Tsang-Foster Susy
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