Fume extraction
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United States of America Patent
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Sep 1, 2015
Grant Date -
Mar 5, 2015
app pub date -
Sep 5, 2013
filing date -
Sep 5, 2013
priority date (Note) -
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Abstract
An operational monitoring apparatus for a fume extraction filter assembly having a pressure sensor assembly and a data processor. The pressure sensor assembly senses fluid pressure at an outlet to a downstream filter, fluid pressure from an inlet to an upstream filter, and fluid pressure from fluid flowing from an outlet of the upstream filter to the inlet of the downstream filter. The data processor processes fluid pressure difference values between the respective inlet and outlet of each filter.
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