Particle concentrator
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Dec 7, 2004
Grant Date -
Jan 22, 2004
app pub date -
Feb 28, 2003
filing date -
Sep 8, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Particles in a fluid flow are concentrated by a combination of electrical charging and focussing and passage through a virtual impact concentrator. The fluid is passed through an electrical charging section and an electrical focussing section and then to a virtual impact concentrator. The majority of charged particles in a selected size range are collected through a minor discharge passage extending axially from the virtual impact concentrator. The invention is particularly suitable for sampling engine exhaust gases and ambient aerosols.
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