Patent US3739707A successfully refreshed from Google Patents.
US3739707A
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US
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Smoke-fume exhaust system
Assignee: MKM Corp
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Filing: 1972-05-01
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Granted: 1973-06-19
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Expires: 1992-05-01
Abstract
Abstract A smoke-fume exhaust system including a room air circulation system of the type that normally mixes source or conditioned air with room recirculated air. A detector responsive to the presence of smoke and fumes in the room causes the air circulation system to change the direction of air flow therethrough exhausting the room of the smoke and fumes as by actuating a first damper which isolates the blower from source air so that it only draws room air, and also actuating a second damper which directs the blower exhaust into a bypass duct. In the case of multiple rooms, the detector sensing smoke and fumes in one room may be used to control the air flow through systems of adjacent rooms in such a manner that the systems of adjacent rooms only admit source or outside air, which pressurizes the adjacent rooms preventing the spread of smoke and fumes to the adjacent rooms.
Inventors
- 👤 G Knapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:43
CPC Classifications
B; B08; B08B; B08B15/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
111 words
A smoke exhaust system comprising a room air circulation system including a blower, means for introducing source air and room recirculated air to said blower for mixing of such air in the desired proportions prior to discharge from said blower into the room, a smoke detector, first means responsive to the detection of smoke by said smoke detector for isolating the blower from the source air so that substantially only room recirculated air passes through said blower, and second means responsive to the detection of smoke by said smoke detector for directing the air discharge from said blower away from the room to the outside thereby exhausting the room of smoke.
Claim 2
Dependent Claim
111 words
A smoke exhaust system comprising a room air circulation system including a blower, means for introducing source air and room recirculated air to said blower for mixing of such air in the desired proportions prior to discharge from said blower into the room, a smoke detector, first means responsive to the detection of smoke by said smoke detector for isolating the blower from the source air so that substantially only room recirculated air passes through said blower, and second means responsive to the detection of smoke by said smoke detector for directing the air discharge from said blower away from the room to the outside thereby exhausting the room of smoke.
Claim 3
Dependent Claim
49 words
The system of claim 1 wherein said blower is a proportional blower including openings for admitting the source air and room recirculated air and damper means for varying the size of said opeNings to vary the amount of such source air and room recirculated air admitted to said blower.
Claim 4
Dependent Claim
26 words
The system of claim 1 wherein damper means are provided for controlling the relative amounts of source air and room recirculated air admitted to said blower.
Claim 5
Dependent Claim
64 words
The system of claim 1 wherein there are a plurality of said room air circulation systems for a structure having multiple rooms, each room having an individual air circulation system, and means are provided for isolating the blowers of selected rooms adjacent a room affected by smoke so that the blowers of such selected rooms receive only source air for pressurizing the adjacent rooms.
Claim 6
Dependent Claim
54 words
The system of claim 4 wherein said last-mentioned means comprises means responsive to a signal from the smoke detector of a room in which smoke is detected to cut off the flow of room air to the blowers of adjacent rooms so that the blowers of adjacent rooms receive substantially 100 percent source air.
Claim 7
Dependent Claim
134 words
In a room circulation system of the type including a blower having first and second intake openings and an exhaust opening, a source air connection in communication with the first opening, a room air connection in communication with the second opening, and air distribution means in communication with the exhaust opening, the improvement comprising a bypass also in communication with the blower exhaust opening, a smoke detector, first means responsive to the detection of smoke by said smoke detector for isolating the air distribution means from the blower exhaust opening, and second means responsive to the detection of smoke by said smoke detector for isolating the blower first opening from the source air connection, whereby, on detection of smoke, the blower only discharges room air through said bypass to exhaust the room of smoke.
Claim 8
Dependent Claim
134 words
In a room circulation system of the type including a blower having first and second intake openings and an exhaust opening, a source air connection in communication with the first opening, a room air connection in communication with the second opening, and air distribution means in communication with the exhaust opening, the improvement comprising a bypass also in communication with the blower exhaust opening, a smoke detector, first means responsive to the detection of smoke by said smoke detector for isolating the air distribution means from the blower exhaust opening, and second means responsive to the detection of smoke by said smoke detector for isolating the blower first opening from the source air connection, whereby, on detection of smoke, the blower only discharges room air through said bypass to exhaust the room of smoke.
Claim 9
Dependent Claim
39 words
The system of claim 6 further comprising closure means normally closing said bypass, and means responsive to the detection of smoke by said smoke detector to open said closure means to permit the passage of air through said bypass.
Claim 10
Dependent Claim
25 words
The system of claim 7 further comprising damper means for controlling the relative amounts of source air and room recirculated air admitted to said blowers.
Claim 11
Dependent Claim
67 words
A fume and smoke exhaust system comprising an air circulation system for mixing source or conditioned air with recirculated air and discharging such air after mixing into an area, a smoke and fume detector for such area, and means responsive to the detection of smoke by said smoke and fume detector for converting said air circulation system to an exhaust system for exhausting such area of smoke.
Claim 12
Dependent Claim
67 words
A fume and smoke exhaust system comprising an air circulation system for mixing source or conditioned air with recirculated air and discharging such air after mixing into an area, a smoke and fume detector for such area, and means responsive to the detection of smoke by said smoke and fume detector for converting said air circulation system to an exhaust system for exhausting such area of smoke.
Claim 13
Dependent Claim
77 words
The system of claim 9 wherein there are a plurality of said air circulation systems for each area of a structure having multiple areas to be exhausted, and means are provided for converting the air circulation systems of areas contiguous to the smoke or fume containing area substantially entirely to introduction of source air into the areas, said last-mentioned means pressurizing the areas and thereby confining the smoke and fumes to the smoke and fume containing area.
Claim 14
Dependent Claim
143 words
A smoke exhaust system for multiple areas of a structure comprising an air circulation system for each area, each said air circulation system comprising a blower for mixing source air and area recirculated air and discharging the same into said area, a bypass duct for each area, a smoke detector for each area associated with the air circulation system therein, each system further including first means responsive to the detection of smoke by the smoke detector associated therewith the directing the flow from the blower thereof into said bypass duct and for isolating the blower from source air so that the blower receives only area recirculated air, and second means responsive to the detection of smoke by an adjacent area smoke detector for isolating the blower thereof from area recirculated air so that the blower receives only source air thereby pressurizing the area.
Claim 15
Dependent Claim
143 words
A smoke exhaust system for multiple areas of a structure comprising an air circulation system for each area, each said air circulation system comprising a blower for mixing source air and area recirculated air and discharging the same into said area, a bypass duct for each area, a smoke detector for each area associated with the air circulation system therein, each system further including first means responsive to the detection of smoke by the smoke detector associated therewith the directing the flow from the blower thereof into said bypass duct and for isolating the blower from source air so that the blower receives only area recirculated air, and second means responsive to the detection of smoke by an adjacent area smoke detector for isolating the blower thereof from area recirculated air so that the blower receives only source air thereby pressurizing the area.
Claim 16
Dependent Claim
66 words
The exhaust system of claim 11 wherein each said blower Is a proportional blower having first and second intake openings, a plenum chamber in communication with each opening, and damper means for opening and closing said openings for proportioning the flow of air therethrough, one of said openings being in communication with source air and the other of said openings being in communication with recirculated air.
References Cited (Backward Citations)
US2299815A
Cited
US3323439A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-18 | 1976-12-18 | 1977-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-18 | 1980-12-18 | 1981-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-18 | 1984-12-18 | 1985-06-19 | $7700.00 | Window Closed / Lapsed |