US5606495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling air pollution
Assignee: Individual
•
Filing: 1994-11-30
•
Granted: 1997-02-25
•
Expires: 2014-11-30
Abstract
Abstract Process and device are provided for controlling air pollution. The apparatus includes electrochemical, electrothermal and humidity sensors which sense the presence of selected polluting gases and activate an electronic circuitry which controls the release of oxygen, fresh air, or perfumed air and thereby dilutes the concentration of polluting gases within a selected space.
Inventors
- 👤 Sandeep Jaidka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:18
CPC Classifications
G; G05; G05D; G05D21/00; G05D21/02; B; B01; B01D; B01D46/00; B01D46/42; B01D46/44; B01D46/46; B01D53/00; B01D53/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
162 words
An air pollution control device for controlling ambient air pollution in a predetermined space, comprising: at least one sensing device for sensing at least one selected polluting gas in said space and for generating a corresponding signal; a signal conditioning circuit for receiving and amplifying said signal generated by said sensing device; a comparator circuit for comparing the amplified signal with a predetermined reference signal and providing a corresponding output signal; a timing circuit for receiving the output signal from said comparator circuit and generating a corresponding timing signal; pollution diluting means for providing at least one diluting gas for diluting the at least one polluting gas present in said space until desired limits are reached; decision logic means responding to said timing signal for controlling activation of said pollution diluting means; and audio/visual means for indicating that the at least one pollutant gas is present and needs to be diluted and for responding to said activation of said pollution dilution means.
Claim 2
Dependent Claim
162 words
An air pollution control device for controlling ambient air pollution in a predetermined space, comprising: at least one sensing device for sensing at least one selected polluting gas in said space and for generating a corresponding signal; a signal conditioning circuit for receiving and amplifying said signal generated by said sensing device; a comparator circuit for comparing the amplified signal with a predetermined reference signal and providing a corresponding output signal; a timing circuit for receiving the output signal from said comparator circuit and generating a corresponding timing signal; pollution diluting means for providing at least one diluting gas for diluting the at least one polluting gas present in said space until desired limits are reached; decision logic means responding to said timing signal for controlling activation of said pollution diluting means; and audio/visual means for indicating that the at least one pollutant gas is present and needs to be diluted and for responding to said activation of said pollution dilution means.
Claim 3
Dependent Claim
21 words
The air pollution control device according to claim 1, wherein: said sensing device comprises electrochemical sensors/transducers, including thermoelectric and humidity sensors.
Claim 4
Dependent Claim
26 words
The air pollution control device according to claim 2, wherein: said electrochemical sensors are respectively sensitive to oxides of carbon, sulphur, nitrogen and hydride of nitrogen.
Claim 5
Dependent Claim
32 words
The air pollution control device according to claim 1, wherein: an indicator means is provided in the signal conditioning circuit to selectively indicate a current pollution level and a reference pollution level.
Claim 6
Dependent Claim
32 words
The air pollution control device according to claim 1, further comprising: a power circuit which includes a power management circuit and a parameter controller for monitoring said at least one sensing device.
Claim 7
Dependent Claim
49 words
The air pollution control device according to claim 1, further comprising: a parameter controller which comprises a calibration circuit connected to a timing management circuit and a voltage management circuit, an output of the voltage management circuit being fed to said sensing device for monitoring thereof at predetermined conditions.
Claim 8
Dependent Claim
28 words
The air pollution control device according to claim 1, wherein: two or more sensing devices are connected in parallel in the air pollution device, for improved functioning thereof.
Claim 9
Dependent Claim
62 words
The air pollution control device according to claim 1, further comprising: a reference signal generator means for generating a reference signal provided to the comparator circuit for generating said timing signal in correspondence therewith, wherein the comparator circuit, the timing circuit, the reference signal generator means, and the decision logic means are all embodied in a microcontroller comprising means for automatic operation.
Claim 10
Dependent Claim
64 words
The air pollution control device according to claim 1, wherein: said pollution dilution means consists of an electromechanical releasing means connected to a cylinder supplying at least one of oxygen, fresh air, and perfumed air, said electromechanical releasing means opening a lid of the said cylinder for a period determined by said timing circuit to thereby dilute the polluted gases in the predetermined space.
Claim 11
Dependent Claim
37 words
The air pollution control device according to claim 1, further comprising: an electromechanical releasing means which comprises one of a solenoid valve or an electric motor with a lever/gear mechanism to open a lid of the cylinder.
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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) | 2000-02-25 | 2000-08-26 | 2001-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-02-25 | 2004-08-26 | 2005-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-02-25 | 2008-08-26 | 2009-02-25 | $7700.00 | Window Closed / Lapsed |