US4727931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air exchanging apparatus and method
Assignee: Individual
•
Filing: 1986-05-16
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Granted: 1988-03-01
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Expires: 2006-05-16
Abstract
Abstract Apparatus for exchanging contaminated room air with fresh outdoor air and a method for operating same is disclosed. The apparatus includes a housing having a pair of substantially parallel air passageways sealed from one another and providing fluid communication between the room and the outdoors. A heat recovery rotor is disposed in the air passageways in an inclined orientation.
Inventors
- 👤 Erling Berner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:21
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/12; F24F3/14; F24F3/1411; F24F3/1423; F24F2003/1458; F24F2003/1464; F24F2203/00; F24F2203/10; F24F2203/1004; F24F2203/1012; F24F2203/1032; F24F2203/104; F24F2203/1068; F24F2203/1084; F24F2203/1096; Y; Y10; Y10S; Y10S165/00; Y10S165/009; Y10S165/013; Y10S165/016; Y10S165/909
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
57 words
A method for reducing the static pressure loss across a heat recovery rotor of an air exchanging apparatus in which incoming air enters the apparatus in a substantially horizontal stream, said method comprising the step of: inclining the plane of rotation of said rotor so that said plane and said incoming airstream form an acute included angle.
Claim 2
Independent Claim
57 words
A method for reducing the static pressure loss across a heat recovery rotor of an air exchanging apparatus in which incoming air enters the apparatus in a substantially horizontal stream, said method comprising the step of: inclining the plane of rotation of said rotor so that said plane and said incoming airstream form an acute included angle.
References Cited (Backward Citations)
US2183936A
Cited
US3491537A
Cited
US4172164A
Cited
JPS5899627A
Cited
US4513809A
Cited
US4512392A
Cited
US4512393A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-01 | 1991-08-31 | 1992-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-01 | 1995-08-31 | 1996-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-01 | 1999-08-31 | 2000-03-01 | $7700.00 | Window Closed / Lapsed |