Patent US3731464A successfully refreshed from Google Patents.
US3731464A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous aerosol concentrator
Assignee: United States Department of the Army
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Filing: 1971-01-19
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Granted: 1973-05-08
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Expires: 1991-01-19
Abstract
Abstract An airborne particle monitoring device comprising a housing suitably contoured to form a chamber, inlet, outlet and exhaust means connecting with said chamber. In operation, a vacuum power source is applied to the outlet and exhaust means to conduct a particle containing air stream into the chamber where it is suspended and concentrated in a stream of stagnant air. A second stream of air conducts the concentrated particles to a suitable collection device.
Inventors
- 👤 A Brumbaugh
- 👤 S Mumford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:11
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2202; G01N2001/222; G01N2001/2223
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A continuous aerosol concentrator comprising a housing suitably contoured to form a rectangular chamber, said chamber having an inlet conduit member protruding therein an end segment of the inlet member having an internal reduced flat bottom end, the internal reduced segment forming an orifice utilizing an angle designed to give maximum collection efficiency for a desired particle, an outlet member extending from the bottom of the housing to collecting means, the interior of said outlet member having a recessed segment adjacent the chamber and connecting therewith, the inside diameter of the outlet conduit member being equal to or less than the diameter of the orifice, and having an exhaust port communicating with the exterior from the chamber; and vacuum power sources connected to the outlet member and the exhaust port.
Claim 2
Dependent Claim
130 words
A continuous aerosol concentrator comprising a housing suitably contoured to form a rectangular chamber, said chamber having an inlet conduit member protruding therein an end segment of the inlet member having an internal reduced flat bottom end, the internal reduced segment forming an orifice utilizing an angle designed to give maximum collection efficiency for a desired particle, an outlet member extending from the bottom of the housing to collecting means, the interior of said outlet member having a recessed segment adjacent the chamber and connecting therewith, the inside diameter of the outlet conduit member being equal to or less than the diameter of the orifice, and having an exhaust port communicating with the exterior from the chamber; and vacuum power sources connected to the outlet member and the exhaust port.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-07 | 1976-11-06 | 1977-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-07 | 1980-11-06 | 1981-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-07 | 1984-11-06 | 1985-05-08 | $7700.00 | Window Closed / Lapsed |