Patent US4990313A successfully refreshed from Google Patents.
US4990313A
Expired / Lapsed
US
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Ultraviolet device
Assignee: AMERICAN ULTRA-AIR Inc A CORP OF SC
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Filing: 1990-01-12
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Granted: 1991-02-05
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Expires: 2010-01-12
Abstract
Abstract A switch-controlled, ballasted, low-frequency, ultraviolet device mounted inline in an air-return system of an air-conditioning unit to resupply return air. The air-return system has an upstream filter and downstream cooling coil, drain pan and blower fan. The ultraviolet device is disposed inline between the filter and cooling coil, and in closest proximity to the cooling coil to maximize its effectiveness. Ultraviolet emissions, directed at the cooling coil and drain pan, destroy cooling-coil-and-drain-pan bacterial accumulations, growth of mold spores or slime, dust mites, airborne diseases, pollens and pollutants, and purify such return air.
Inventors
- 👤 Richard W. Pacosz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:45
CPC Classifications
F; F24; F24F; F24F8/00; F24F8/10; F24F8/192; F24F8/20; F24F8/22; Y; Y02; Y02A; Y02A50/00; Y02A50/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
An ultraviolet device in combination with an air-return system of an air-conditioning unit to resupply return air; said air-return system comprising a housing member mounting inline an upstream filter, a downstream cooling coil and drain pan, and downstream blower fan, said blower fan drawing therethrough and resupplying said return air through said filter and cooling coil, said ultraviolet device being interposed inline between said filter and said cooling coil and drain pan with emissions from said ultraviolet device being directed to said cooling coil and drain pan to retard, or otherwise destroy, bacterial accumulations and growth of mold spores and slime on and around said cooling coil and drain pan, dust mites, airborne diseases, pollens and pollutants, and to purify said return air.
Claim 2
Dependent Claim
123 words
An ultraviolet device in combination with an air-return system of an air-conditioning unit to resupply return air; said air-return system comprising a housing member mounting inline an upstream filter, a downstream cooling coil and drain pan, and downstream blower fan, said blower fan drawing therethrough and resupplying said return air through said filter and cooling coil, said ultraviolet device being interposed inline between said filter and said cooling coil and drain pan with emissions from said ultraviolet device being directed to said cooling coil and drain pan to retard, or otherwise destroy, bacterial accumulations and growth of mold spores and slime on and around said cooling coil and drain pan, dust mites, airborne diseases, pollens and pollutants, and to purify said return air.
Claim 3
Dependent Claim
61 words
An ultraviolet device in accordance with claim 1, wherein said air-return system has a housing, wherein said housing has a top wall and a bottom wall, and wherein is further provided a rod, said rod being operatively engaged with said top and bottom walls, and said rod vertically disposing and mounting said ultraviolet device inline between said filter and cooling coil.
Claim 4
Dependent Claim
30 words
An ultraviolet device in accordance with claim 1, wherein said ultraviolet device is disposed and located in closest proximity to said cooling coil and drain pan to maximize its effectiveness.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-02-04 | 1994-08-06 | 1995-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-04 | 1998-08-06 | 1999-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-04 | 2002-08-06 | 2003-02-05 | $7700.00 | Window Closed / Lapsed |