Check valve and fuel cell system using the same

Details Check valve and fuel cell system using the same Check valve and fuel cell system using the same

2006-12-05

2006-12-05

Ryan, Patrick Joseph (Department: 1745)

Chemistry: electrical current producing apparatus, product, and

With pressure equalizing means for liquid immersion operation

C429S006000, C137S855000

Reexamination Certificate

active

07144650

ABSTRACT:
A check valve is disposed in a hydrogen offgas circulation path which is connected to a fuel cell so as to flow the hydrogen offgas only in one direction. Inside a valve housing, a first compression chamber and a second compression chamber are provided such that a bulkhead is disposed therebetween. In the bulkhead14, a first communication hole18and a second communication hole19are formed so as to communicate between the first compression chamber and the second compression chamber. In a first reed valve, an opening end is disposed upward and a fixed end is disposed downward. In a second reed valve, an opening end is disposed downward and a fixed end is disposed upward. By doing this, operability in the check valve after water has frozen can be improved.

REFERENCES:
patent: 3615842 (1971-10-01), Craft et al.
patent: 6280867 (2001-08-01), Elias
patent: 7-272738 (1995-10-01), None
patent: 2002-313389 (2001-04-01), None

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