US3847065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ventilation system
Assignee: Novenco Building and Industry AS
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Filing: 1973-06-07
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Granted: 1974-11-12
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Expires: 1993-06-07
Abstract
Abstract A ventilation system comprising ducts for injecting air into and exhausting air from a room, said ducts being separated by a partition incorporating an opening between the ducts in which a heat conducting damper plate, both surfaces of which are provided with coatings of an insulating material, is movably arranged to adjust the ventilation. The insulating coating of the surface facing the injected air flow covers the plate completely absent from a peripheral area of the part of the plate located in the injection duct, whereas the coating on the opposite surface covers the part of the plate located in said injection duct right to the peripheral edge of the plate and leaves the part of the plate located in the exhaust duct uncovered.
Inventors
- 👤 P Christiansen
- 👤 J Holt
- 👤 C Videmark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:02
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/0047; A01K1/0058; F; F24; F24F; F24F12/00; F24F12/001; F24F12/006; Y; Y02; Y02A; Y02A40/00; Y02A40/70; Y02A40/76; Y02B; Y02B30/00; Y02B30/56; Y02P; Y02P60/00; Y02P60/12; Y02P60/50
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
213 words
A ventilation system comprising a duct for the injection of fresh air and a duct for the exhaustion of air from a ventilated room, said ducts extending at least on part of their length side by side, a common flat partition separating said ducts on said part of their length and incorporation an opening between said ducts and a damper member which is arranged in said opening to be movable between two extreme position in one of which it closes said opening and in the other of which it blocks both ducts and opens up for complete recirculation of air exhausted from the room back to the room through the injection duct, said damper member consisting of a damper plate of a material of high heat conductivity and coatings of insulating material applied to both surfaces of said plate, the coating on the surface facing the injected air flow covering said plate completely absent from an area along the peripheral edge of the part of the damper plate located in the injection duct and the coating on the opposite surface of said damper plate covering said part of the plate located in the injection duct right to said peripheral edge and leaving the part of the plate located in the exhaust duct uncovered.
Claim 2
Dependent Claim
213 words
A ventilation system comprising a duct for the injection of fresh air and a duct for the exhaustion of air from a ventilated room, said ducts extending at least on part of their length side by side, a common flat partition separating said ducts on said part of their length and incorporation an opening between said ducts and a damper member which is arranged in said opening to be movable between two extreme position in one of which it closes said opening and in the other of which it blocks both ducts and opens up for complete recirculation of air exhausted from the room back to the room through the injection duct, said damper member consisting of a damper plate of a material of high heat conductivity and coatings of insulating material applied to both surfaces of said plate, the coating on the surface facing the injected air flow covering said plate completely absent from an area along the peripheral edge of the part of the damper plate located in the injection duct and the coating on the opposite surface of said damper plate covering said part of the plate located in the injection duct right to said peripheral edge and leaving the part of the plate located in the exhaust duct uncovered.
Claim 3
Dependent Claim
47 words
A ventilation system as claimed in claim 1, wherein said coating of insulating material on said opposite surface covers only a fraction of said part of the plate located in the injection duct, said fraction including, however, the whole peripheral edge of said part of the plate.
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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |