US5742516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indoor air quality and ventilation assessment monitoring device
Assignee: Individual
•
Filing: 1994-03-17
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Granted: 1998-04-21
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Expires: 2014-03-17
Abstract
Abstract A monitoring device system and a method for controlling ventilation in an enclosed or confined environment by regulating the effective ventilation rate, air exchange rate, mixing factors, stratification of air within the confined area, the percentage of outside air which is introduced (when possible), the percentage of recirculated air, mean air life, air half-life are described. The device may be used for controlling an HVAC system so that air quality conforms to predetermined air quality standards. The monitoring device consists of a multiport sample collection system and one or more sensors to detect determinants of air quality. The method of control uses a CPU to regulate fans, dampers, and other systems to maintain the air quality within predetermined ranges, based upon the monitoring data. A tracer gas, preferably CO 2 , is used to determine system parameters. Measurement of additional gases and particulates and local ventilation control responsive to such toxicants is limited only by the availability of suitable detection methods.
Inventors
- 👤 Robert Olcerst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:30
CPC Classifications
F; F24; F24F; F24F11/00; F24F11/0001; F24F11/30; F24F1/00; F24F1/0007; F24F1/0035; F24F1/0038; F24F1/0071; F24F1/0083; F24F1/0087; F24F11/62; F24F11/63; F24F11/64; F24F2110/00; F24F2110/50; F24F2110/65; F24F2110/70; Y; Y02; Y02B; Y02B30/00; Y02B30/70; Y10; Y10T; Y10T436/00; Y10T436/20; Y10T436/204998; Y10T436/207497; Y10T436/208339; Y10T436/209163
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A method for controlling the quality of the air within a confined environment comprising: (a) introducing air into one or more sampling ports connected to one or more detectors of toxic chemicals; (b) introducing a known amount of a gas detectable by one or more of said detection devices into said confined environment: (c) analyzing the output from the detectors; (d) comparing the output from said detectors with numerical standards; (e) controlling the functions of at least one air handling system; and (f) monitoring the function of the at least one air handling system.
Claim 2
Independent Claim
94 words
A method for controlling the quality of the air within a confined environment comprising: (a) introducing air into one or more sampling ports connected to one or more detectors of toxic chemicals; (b) introducing a known amount of a gas detectable by one or more of said detection devices into said confined environment: (c) analyzing the output from the detectors; (d) comparing the output from said detectors with numerical standards; (e) controlling the functions of at least one air handling system; and (f) monitoring the function of the at least one air handling system.
Claim 3
Independent Claim
47 words
A method for the measurement of air quality comprising: introducing a discrete amount of carbon dioxide into a confined environment and comparing the amount of carbon dioxide which is present with the amount which should be present as a result of the intentional introduction of carbon dioxide.
Claim 4
Independent Claim
47 words
A method for the measurement of air quality comprising: introducing a discrete amount of carbon dioxide into a confined environment and comparing the amount of carbon dioxide which is present with the amount which should be present as a result of the intentional introduction of carbon dioxide.
Claim 5
Independent Claim
92 words
An apparatus for the control of air quality in confined environments comprising: (a) one or more sampling ports connected to one or more detection devices; (b) means for introducing a known amount of a gas detectable by one or more of said detection devices; (c) means for evaluation of the data outputted from one or more of said detection devices; (d) means for control of an air handling system to maintain air quality in a confined environment within parameters which have been preset into the means for the evaluation of the data.
Claim 6
Independent Claim
92 words
An apparatus for the control of air quality in confined environments comprising: (a) one or more sampling ports connected to one or more detection devices; (b) means for introducing a known amount of a gas detectable by one or more of said detection devices; (c) means for evaluation of the data outputted from one or more of said detection devices; (d) means for control of an air handling system to maintain air quality in a confined environment within parameters which have been preset into the means for the evaluation of the data.
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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) | 2001-04-20 | 2001-10-20 | 2002-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-20 | 2005-10-20 | 2006-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-20 | 2009-10-20 | 2010-04-21 | $7700.00 | Window Closed / Lapsed |