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US 2005/0028616 A1Published application
Cascade impactor with individually driven impactor plates
AssigneeMSP Corporation
InventorsVirgil Marple, Benjamin Liu
Life of this patent
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AssigneeMSP Corporation
InventorsVirgil Marple, Benjamin Liu
Estimating the term…
A cascade impactor apparatus has a series of vertically stacked impactor housing sections. Each of the impactor housing sections has an upper portion that supports a motor for driving an impactor plate that is positioned below a nozzle through which flow passes. Each housing section also has an outlet passageway leading to a lower impactor chamber for the next in a series of impactor chambers, except the last outlet passageway is coming through a filter to exhaust. The impactor chambers are defined by a skirt that seals on the neck of the next downstream housing section. The impactor plates are each driven by a separate motor, and held onto a hub on the motor output shaft with a magnetic coupling so the plates can be removed when the housings are separated.
A cascade impactor apparatus comprising a housing having a plurality of impactor chambers, a plurality of impactor plates, each impactor plate being positioned in an impactor chamber, a flow passageway formed through the housing, said flow passageway having a separate nozzle associated with each impactor plate, and an individual, separate motor for rotating at least a selected number of the impactor plates about a substantially central axis of the respective impactor plate.
An impactor comprising a housing defining an impactor chamber, an inlet nozzle in the impactor chamber to direct fluid flow carrying particles to be classified into the impactor chamber, an impactor plate supported in the impactor chamber and aligned with the nozzle to receive particles of size to impact upon a surface of the impactor plate, and an individual motor mounted on the housing for rotationally driving the impactor plate about an axis generally perpendicular to the impactor plate.
Dependencies are inferred from the claim text.