US4710887A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Computer controlled constant concentration and size particulate general system
Assignee: Department of National Defence
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Filing: 1985-06-17
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Granted: 1987-12-01
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Expires: 2005-06-17
Abstract
Abstract An aerosol generating system for maintaining a constant concentration of aerosol in a chamber is disclosed. The system includes an aerosol generator in a closed chamber. A small fan in the chamber distributes the aerosol within the chamber. A particle analyzer connected to the chamber draws aerosol samples and analyses samples to monitor at least one characteristic property of the aerosol. Typically, these are particulate concentration and particulate size. The system includes a control responsive to signals from the analyzer representing changes in the monitored characteristic property to control operation of the aerosol generator. The control is such as to maintain the characteristic property substantially constant. The system may also be equipped with humidity and temperature control elements for maintaining these factors constant within the chamber.
Inventors
- 👤 Jim Y. W. Ho
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:27
CPC Classifications
G; G05; G05D; G05D11/00; G05D11/02; G05D11/13; G05D11/131; F; F24; F24F; F24F11/00; F24F11/70; F24F11/72; F24F11/74; F24F11/77; F24F11/30; F24F2110/00; F24F2110/10; F24F2110/20; F24F2110/50; F24F2110/64; Y; Y02; Y02B; Y02B30/00; Y02B30/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
86 words
An aerosol generating system comprising: (a) a closed chamber; (b) an aerosol generator in the chamber; (c) means for generating an air flow within the chamber to distribute aerosols therein; (d) a particle analyzer connected to the chamber to draw aerosol samples therefrom and to monitor particle size range of the aerosol; and (e) control means responsive to signals from the analyzer representative of changes in said particle size range to control operation of the aerosol generator so as to maintain said particle size substantially constant.
Claim 2
Dependent Claim
86 words
An aerosol generating system comprising: (a) a closed chamber; (b) an aerosol generator in the chamber; (c) means for generating an air flow within the chamber to distribute aerosols therein; (d) a particle analyzer connected to the chamber to draw aerosol samples therefrom and to monitor particle size range of the aerosol; and (e) control means responsive to signals from the analyzer representative of changes in said particle size range to control operation of the aerosol generator so as to maintain said particle size substantially constant.
Claim 3
Dependent Claim
84 words
An aerosol generating system comprising: (a) a closed chamber; (b) an aerosol generator in the chamber; (c) means for generating an air flow within the chamber to distribute aerosols therein; (d) a particle analyzer connected to the chamber to draw aerosol samples therefrom and to monitor particle concentration of the aerosol; and (e) control means responsive to signals from the analyzer representative of changes in said particle concentration to control operation of the aerosol generator so as to maintain said particle concentration substantially constant.
Claim 4
Dependent Claim
84 words
An aerosol generating system comprising: (a) a closed chamber; (b) an aerosol generator in the chamber; (c) means for generating an air flow within the chamber to distribute aerosols therein; (d) a particle analyzer connected to the chamber to draw aerosol samples therefrom and to monitor particle concentration of the aerosol; and (e) control means responsive to signals from the analyzer representative of changes in said particle concentration to control operation of the aerosol generator so as to maintain said particle concentration substantially constant.
Claim 5
Dependent Claim
104 words
An aerosol generating system comprising: (a) a closed chamber; (b) an aerosol generator in the chamber including climate control means for maintaining both the temperature and humidity in the chamber substantially constant; (c) means for generating an air flow within the chamber to distribute aerosols therein; (d) a particle analyzer connected to the chamber to draw aerosol samples therefrom and to monitor the particle concentration property of the aerosol; and (e) control means responsive to signals from the analyzer representative of changes in the monitored particle concentration to control operation of the aerosol generator so as to maintain said particle concentration property substantially constant.
Claim 6
Dependent Claim
104 words
An aerosol generating system comprising: (a) a closed chamber; (b) an aerosol generator in the chamber including climate control means for maintaining both the temperature and humidity in the chamber substantially constant; (c) means for generating an air flow within the chamber to distribute aerosols therein; (d) a particle analyzer connected to the chamber to draw aerosol samples therefrom and to monitor the particle concentration property of the aerosol; and (e) control means responsive to signals from the analyzer representative of changes in the monitored particle concentration to control operation of the aerosol generator so as to maintain said particle concentration property substantially constant.
References Cited (Backward Citations)
US3938348A
Cited
US4222666A
Cited
US4211090A
Cited
US4211487A
Cited
US4250629A
Cited
US4313726A
Cited
US4488248A
Cited
US4419879A
Cited
US4568190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |