Gas separation: apparatus – With sampling means
Reexamination Certificate
2007-06-19
2007-06-19
Smith, Duane (Department: 1724)
Gas separation: apparatus
With sampling means
C055S318000, C055S458000, C055SDIG014, C073S863220, C095S032000, C095S267000
Reexamination Certificate
active
10967568
ABSTRACT:
An inlet for an environmental air monitor is described wherein a pre-separator interfaces with ambient environment air and removes debris and insects commonly associated with high wind outdoors and a deflector plate in communication with incoming air from the pre-separator stage, that directs the air radially and downward uniformly into a plurality of accelerator jets located in a manifold of a virtual impactor, the manifold being cylindrical and having a top, a base, and a wall, with the plurality of accelerator jets being located in the top of the manifold and receiving the directed air and accelerating directed air, thereby creating jets of air penetrating into the manifold, where a major flow is deflected to the walls of the manifold and extracted through ports in the walls. A plurality of receiver nozzles are located in the base of the manifold coaxial with the accelerator jets, and a plurality of matching flow restrictor elements are located in the plurality of receiver nozzles for balancing and equalizing the total minor flow among all the plurality of receiver nozzles, through which a lower, fractional flow extracts large particle constituents of the air for collection on a sample filter after passing through the plurality of receiver nozzles and the plurality of matching flow restrictor elements.
REFERENCES:
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Thomas J. Yule, “An On-Line Monitor For Alpha-Emitting Aerosols,” IEEE Transactions on Nuclear Science, vol. NS-25, No. 1, pp. 762-766, Feb. 1978.
Fitzgerald Mark N.
Los Alamos National Security LLC
Smith Duane
Teeter Holly L.
Turner Sonji
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