Impactor nozzle plate
AssigneeMSP Corporation
InventorsVirgil A. Marple, Daryl L. Roberts
Life of this patent
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Abstract
A orifice plate used in an impactor that has a large number of very small openings therein is made of a thin material, and has a plurality of projections that extend outwardly from one surface thereof. The orifice plate is mounted adjacent a plate surface, and the projections serve to support the orifice plate spaced from the surface when the orifice plate deflects under differential pressures.
Claims8
A thin orifice plate for a cascade impactor which has a plurality of openings therein of small diameter, and the plate tending to bow under differential pressures during normal operation relative to a surface adjacent to which the orifice plate is supported, said orifice plate having a selected number of known height protrusions extending from the orifice plate toward the surface, to provide support to prevent the orifice plate from contacting the surface at other than the locations of the protrusions during operation.
Dependencies are inferred from the claim text.