Cascade impactor with individually driven impactor plates

Details Cascade impactor with individually driven impactor plates Cascade impactor with individually driven impactor plates

2006-08-01

2006-08-01

Williams, Hezron (Department: 2856)

Measuring and testing

Gas analysis

Solid content of gas

C073S863220

Reexamination Certificate

active

07082811

ABSTRACT:
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.

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Copy of Official Search Report in counterpart foreign application No. PCT/US2004/025461, filed Aug. 6, 2004.
Copy of Written Opinion of the International Searching Authority in counterpart foregin application No. PCT/US2004/025461, filed Aug. 6, 2004.

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