Chemistry: electrical current producing apparatus – product – and – Having magnetic field feature
Reexamination Certificate
2005-04-19
2005-04-19
Le, Hoa Van (Department: 1752)
Chemistry: electrical current producing apparatus, product, and
Having magnetic field feature
C429S010000, C429S006000, C429S006000, C073S861750, C073S861770, C073S861780, C073S861790, C073S861880, C073S861930
Reexamination Certificate
active
06881507
ABSTRACT:
The mass flow of hydrogen fuel in the anode loop of a hydrogen fuel cell is measured using a rotating flow meter. The flow meter includes a bladed rotor mounted for rotation within a tube disposed in the stream of hydrogen fuel flowing through the anode loop. A magnetic sensor senses changing magnetic field caused by the rotation of the rotor and produces an alternating signal having a frequency related to the rotational rate of the rotor, and thus of the mass flow rate of the hydrogen fuel. A fuel purity sensor increases the accuracy of the mass flow measurement by determining the concentration of foreign substances contained in the fuel.
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Hanze Carlos L.
Le Hoa Van
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