US3742837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement at ventilation installations in rooms provided with exhaust air windows and lighted by a number of fittings
Assignee: Svenska Flaktfabriken AB
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Filing: 1971-07-14
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Granted: 1973-07-03
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Expires: 1991-07-14
Abstract
Abstract An arrangement at veltilation installations applied to rooms with exhaust air window and being lighted by fluorescent tubes in fittings or fixtures distributed over the ceiling, wherein the passageway for conducting away from the room, the exhaust air being collected adjacent the window surface, is connected to passageways preferably mounted in the ceiling of the room, each of said passageways passing through said fittings of the room for cooling the fluorescent tubes before said exhuast air is conducted away or recirculated to the room via a conditioning unit.
Inventors
- 👤 K Samuelsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:37
CPC Classifications
F; F24; F24F; F24F3/00; F24F3/044; F24F3/056; F21; F21V; F21V33/00; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
141 words
In ventilation installations applied to rooms with an exhaust air window, which rooms are lighted by a number of fluorescent tubes enclosed in fittings and distributed over the ceiling surface of the room, the improvement wherein said installation includes a passageway open to the room interior and passing along the surface of said window for conducting away from the room the exhaust air collected adjacent the window surface, passageways mounted in the ceiling of the room having a connection at one end to said first mentioned passageway and a connection at the other end to an air conditioning unit for recirculating the room air, each of said ceiling passageways passing through the fluorescent tube fittings of the room for cooling the fluorescent tubes by said exhaust air, before it is conducted away and recirculated to the room via a conditioning unit.
Claim 2
Dependent Claim
141 words
In ventilation installations applied to rooms with an exhaust air window, which rooms are lighted by a number of fluorescent tubes enclosed in fittings and distributed over the ceiling surface of the room, the improvement wherein said installation includes a passageway open to the room interior and passing along the surface of said window for conducting away from the room the exhaust air collected adjacent the window surface, passageways mounted in the ceiling of the room having a connection at one end to said first mentioned passageway and a connection at the other end to an air conditioning unit for recirculating the room air, each of said ceiling passageways passing through the fluorescent tube fittings of the room for cooling the fluorescent tubes by said exhaust air, before it is conducted away and recirculated to the room via a conditioning unit.
Claim 3
Dependent Claim
51 words
An installation according to claim 1, characterized in that the exhaust air window of the room has an opening to the room interior at the bottom thereof and has an opening at the top thereof to provide said passageway therebetween for conducting away the collected exhaust air adjacent the window surface.
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) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |