Measuring and testing – Gas content of a liquid or a solid – Of a liquid
Reexamination Certificate
2007-12-04
2007-12-04
Williams, Hezron (Department: 2856)
Measuring and testing
Gas content of a liquid or a solid
Of a liquid
C073S019070
Reexamination Certificate
active
11453350
ABSTRACT:
A method and apparatus for measuring the concentration of gas, such as hydrogen, in a liquid, such as molten aluminum, without requiring a bias or adjustment to compensate for variations in ambient conditions, such as humidity. A measurement system includes a probe connected to an analyzer with a housing enclosing a pump assembly. The measurement system may include a climate-controlled environment substantially devoid of ambient humidity and surrounding at least the pump assembly. A modified pump assembly includes at least one seal, at least one diaphragm and at least one gasket made from a material compatible with hydrogen and substantially unaffected by ambient humidity. A method of use is also disclosed.
REFERENCES:
patent: 4998432 (1991-03-01), Plessers et al.
patent: 5591894 (1997-01-01), Falk et al.
patent: 2004/0190571 (2004-09-01), Sutton et al.
patent: 2005/0063843 (2005-03-01), Walker et al.
Gansemer Todd M.
Hart Jim N.
Alcoa Inc.
Borghetti Peter J.
Greenberg Traurig LLC
West Paul M
Williams Hezron
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