Micro-machined virtual impactor and method of operation
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United States of America Patent
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-
Jan 4, 2000
Grant Date -
N/A
app pub date -
Jun 23, 1997
filing date -
Jun 23, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A micro-machined virtual impactor device to permit the separation, collection and concentration of a significant portion of environmental particulates having a diameter of less than ten microns and its method of operation. The device includes a plurality of projections, each having a virtual impact surface that defines an aperture in a stagnant zone of fluid flow. A major portion of the particulate material is concentrated into a minor portion of the fluid which is processed through the aperture, where it is collected for subsequent analysis.
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