Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2007-11-20
2007-11-20
Yuan, Dah Wei (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000, C429S006000, C429S006000, C429S006000, C429S006000, C029S623100, C029S730000
Reexamination Certificate
active
10699454
ABSTRACT:
A registration arrangement for a fuel cell stack assembly incorporates registration posts and registration apertures or recesses. Fuel cell assemblies of the stack may include first and second flow field plates and a membrane electrode assembly (MEA) having an active area. Registration apertures are defined in each of the MEA and the first and second flow field plates. The respective registration apertures are situated within non-active areas of the MEA when the first and second flow field plates and the MEA are in axial alignment. Registration posts are configured for reception within the registration apertures. Each of the registration posts has an outer surface differing in shape from a shape of the inner surface of the registration apertures. The inner surface of the registration apertures contact the outer surface of the registration posts at a plurality of discrete press-fit locations.
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Boone Mary R.
Boucher Paul M.
Ferguson Dennis E.
O'Brien Dennis P.
Saulsbury Kim B.
Dahl Philip Y.
Hollingsworth Mark A.
O'Neill Karie
Yuan Dah Wei
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