US4589476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air ventilation and filtration apparatus
Assignee: Individual
•
Filing: 1985-05-16
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Granted: 1986-05-20
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Expires: 2005-05-16
Abstract
Abstract Apparatus for exchanging air within an enclosure with outside air while subjecting air within the enclosure to gas filtration and/or electronic air cleaning. The apparatus includes a two-position valve to provide an intake cycle and an exhaust cycle; during both cycles the air treatment means is operative on air within the enclosure.
Inventors
- 👤 Erling Berner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:31
CPC Classifications
F; F24; F24F; F24F7/00; F24F7/04; F24F7/06; F24F7/08; F24F12/00; F24F12/001; F24F2012/008; Y; Y02; Y02B; Y02B30/00; Y02B30/56
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
209 words
Apparatus for exchanging air within an enclosure with outside air while subjecting air within said enclosure to gas filtration comprising: a housing; ducting extending within said housing to provide a central chamber having four ports, each port being in communication with a port in said housing to establish four air flow channels; exhaust fan means mounted in a first of said channels to produce air flow from said enclosure; air supply fan means mounted in a second of said channels to produce air flow into said enclosure; gas filtration means located in a third of said channels, said third channel being ported to said enclosure; a heat storage matrix located in a fourth of said channels, said fourth channel being ported to outside air; and valve means disposed in said central chamber and being positionable with respect to said four ports within said chamber to establish a first operating mode in which said first channel is in air flow communication with said fourth channel and said third channel is in air flow communication with said second channel, and a second operating mode in which said first channel is in air flow communication with said third channel and said fourth channel is in air flow communication with said second channel.
Claim 2
Dependent Claim
209 words
Apparatus for exchanging air within an enclosure with outside air while subjecting air within said enclosure to gas filtration comprising: a housing; ducting extending within said housing to provide a central chamber having four ports, each port being in communication with a port in said housing to establish four air flow channels; exhaust fan means mounted in a first of said channels to produce air flow from said enclosure; air supply fan means mounted in a second of said channels to produce air flow into said enclosure; gas filtration means located in a third of said channels, said third channel being ported to said enclosure; a heat storage matrix located in a fourth of said channels, said fourth channel being ported to outside air; and valve means disposed in said central chamber and being positionable with respect to said four ports within said chamber to establish a first operating mode in which said first channel is in air flow communication with said fourth channel and said third channel is in air flow communication with said second channel, and a second operating mode in which said first channel is in air flow communication with said third channel and said fourth channel is in air flow communication with said second channel.
Claim 3
Dependent Claim
18 words
Apparatus as recited in claim 1 which further comprises: electronic air cleaning means disposed in said second channel.
Claim 4
Dependent Claim
229 words
Apparatus for exchanging air within an enclosure with outside air while subjecting air within said enclosure to gas filtration comprising' a housing; ducting extending within said housing to provide a central chamber having four ports, each port being in communication with a port in said housing to establish four air flow channels; exhaust fan means mounted in a first of said channels to produce air flow from said enclosure; air supply fan means mounted in a second of said channels to produce air flow into said enclosure; air treatment means located in a third of said channels, said third channel being ported to said enclosure and said air treatment means being selected from the group consisting of gas filtration means and electronic air cleaning means; a heating storage matrix located in a fourth of said channels, said fourth channel being ported to outside air; and valve means disposed in said central chamber and being positionable with respect to said four ports within said chamber to establish a first operating mode in which said first channel is in air flow communication with said fourth channel and said third channel is in air flow communication with said second channel, and a second operating mode in which said first channel is in air flow communication with said third channel and said fourth channel is in air flow communication with said second channel.
Claim 5
Dependent Claim
229 words
Apparatus for exchanging air within an enclosure with outside air while subjecting air within said enclosure to gas filtration comprising' a housing; ducting extending within said housing to provide a central chamber having four ports, each port being in communication with a port in said housing to establish four air flow channels; exhaust fan means mounted in a first of said channels to produce air flow from said enclosure; air supply fan means mounted in a second of said channels to produce air flow into said enclosure; air treatment means located in a third of said channels, said third channel being ported to said enclosure and said air treatment means being selected from the group consisting of gas filtration means and electronic air cleaning means; a heating storage matrix located in a fourth of said channels, said fourth channel being ported to outside air; and valve means disposed in said central chamber and being positionable with respect to said four ports within said chamber to establish a first operating mode in which said first channel is in air flow communication with said fourth channel and said third channel is in air flow communication with said second channel, and a second operating mode in which said first channel is in air flow communication with said third channel and said fourth channel is in air flow communication with said second channel.
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) | 1989-05-19 | 1989-11-18 | 1990-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-19 | 1993-11-18 | 1994-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-19 | 1997-11-18 | 1998-05-20 | $7700.00 | Window Closed / Lapsed |