Gas separation: apparatus – With signals – indicators – measuring – or testing means – Pressure measuring means
Reexamination Certificate
2004-11-25
2009-10-27
Griffin, Walter D (Department: 1797)
Gas separation: apparatus
With signals, indicators, measuring, or testing means
Pressure measuring means
C210S411000, C210S413000, C055S283000, C055S294000, C055S302000, C095S279000, C095S281000, C095S283000
Reexamination Certificate
active
07608138
ABSTRACT:
Provided is an apparatus1for measuring pressure loss in a filter2,which apparatus includes filter holding means3; fluid passing means; flow rate measuring means; pressure loss measuring means; and a flow path6which connects the four means such that a fluid can pass between the means. The apparatus further includes flow rate regulating means having a mainstream path7;a tributary path8which is branched from the mainstream path7and communicates with the outside; and one or more flow path opening/closing members9capable of, in conjunction with the level of the fluid flow rate as measured through the flow rate measuring means, opening or closing the mainstream path7or the tributary path8such that the flow path opening ratio of each of the paths varies continuously or intermittently. The apparatus achieves reliable and convenient measurement of pressure loss with the flow rate of the fluid which passes through the filter2being maintained at a constant level by the flow rate regulating means.
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Sakashita Satoshi
Takahashi Mitsuo
Allen Cameron J
Griffin Walter D
NGK Insulators, Inc.
Oliff & Berridg,e PLC
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