US3830145A
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: 1974-08-20
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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 extending side by side separated by a common partition which incorporates an opening between the ducts in which a damper member is arranged to be movable between two extreme positions, in one of which it closes the opening and in the other of which positions it blocks both ducts and opens for full recirculation of the return air from the ventilated room. A layer of heat conductive material is arranged on the inner side of the outer wall of the injection duct, said layer extending from the level at which the damper member contacts the outer wall of the injection duct in the extreme position, in which both ducts are blocked. The layer may have form of a liner member arranged on the inner side of the injection duct and extending also into the exhaust duct.
Inventors
- 👤 J Holt
- 👤 C Videmark
- 👤 P Christiansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:53
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/0047; 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: 8
Claim 1
Independent Claim
171 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 having walls of an insulating material and extending at least on part of their length side by side, a common partition separating said ducts on said part of their length and incorporating an opening between the ducts, a damper member arranged in said opening to be movable between two extreme positions in one of which it closes the opening and in the other of which positions it blocks both ducts and opens for full recirculation of the air from the room back to the room through the injection duct and a layer of a material of high heat conductivity arranged on the inner side of the outer wall of the injection duct, said layer extending from the level at which the damper member contacts the outer wall of the injection duct in the extreme position of the damper member in which both ducts are blocked.
Claim 2
Dependent Claim
171 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 having walls of an insulating material and extending at least on part of their length side by side, a common partition separating said ducts on said part of their length and incorporating an opening between the ducts, a damper member arranged in said opening to be movable between two extreme positions in one of which it closes the opening and in the other of which positions it blocks both ducts and opens for full recirculation of the air from the room back to the room through the injection duct and a layer of a material of high heat conductivity arranged on the inner side of the outer wall of the injection duct, said layer extending from the level at which the damper member contacts the outer wall of the injection duct in the extreme position of the damper member in which both ducts are blocked.
Claim 3
Dependent Claim
26 words
A ventilation system as claimed in claim 1, wherein said heat conducting layer is constituted by a liner member made of metal plate, preferably aluminum plate.
Claim 4
Dependent Claim
18 words
A ventilation system as claimed in claim 1, wherein said heat conducting layer extends into the exhaust duct.
Claim 5
Dependent Claim
39 words
A ventilation system as claimed in claim 3, wherein the said heat conducting layer is constituted by a liner member the parts of which located in the exhaust duct are bent inwardly from the outer wall of said duct.
Claim 6
Dependent Claim
21 words
A ventilation system as claimed in claim 3, wherein said liner member is subdivided by a symmetry plane into two parts.
Claim 7
Dependent Claim
49 words
A ventilation system as claimed in any of claim 1, wherein said heat conducting layer is limited in the direction against the injected air flow in such manner that the border of the layer is located at a higher level in the injection duct than in the exhaust duct.
Claim 8
Dependent Claim
57 words
A ventilation system as claimed in any of claim 1, wherein the heat conducting layer is restricted in the direction against the room in such a way that the area of the part of the layer located in the injection duct is smaller than the area of the part of the layer located in the exhaust duct.
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |