US4519458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flue fire controller
Assignee: KROETER Inc
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Filing: 1983-06-23
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Granted: 1985-05-28
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Expires: 2003-06-23
Abstract
Abstract A flue fire controller is provided which includes a temperature responsive valve between a source of pressurized fire retardant or extinguishing material and the interior of the flue pipe. When the temperature of the flue pipe increases to a level indicative of a flue fire, the valve automatically opens to allow the material to extinguish the fire. Means are also provided to close the valve after the temperature has dropped below the preselected value.
Inventors
- 👤 David W. Kroeter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:34
CPC Classifications
A; A62; A62C; A62C3/00; A62C3/04
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
145 words
A flue fire controller for use in conjunction with a thermally conductive flue pipe used for exhausting combustion by-products from a combustion chamber comprising: a normally open temperature responsive electrical switch mounted on the exterior of said flue pipe in a thermally conductive manner, a source of fire retardant material under pressure connected by conduit means to a nozzle mounted on the exterior of said flue pipe and having an opening into said flue pipe, an electrical solenoid operated normally closed valve means energizable through said temperature responsive electrical switch, said normally closed valve means positioned in said conduit means between said nozzle opening and said source of fire retardant material, whereby a high temperature in said flue pipe will cause said temperature responsive switch to close, thereby energizing said solenoid, opening said valve means, and discharging said fire retardant material into said flue pipe.
Claim 2
Dependent Claim
145 words
A flue fire controller for use in conjunction with a thermally conductive flue pipe used for exhausting combustion by-products from a combustion chamber comprising: a normally open temperature responsive electrical switch mounted on the exterior of said flue pipe in a thermally conductive manner, a source of fire retardant material under pressure connected by conduit means to a nozzle mounted on the exterior of said flue pipe and having an opening into said flue pipe, an electrical solenoid operated normally closed valve means energizable through said temperature responsive electrical switch, said normally closed valve means positioned in said conduit means between said nozzle opening and said source of fire retardant material, whereby a high temperature in said flue pipe will cause said temperature responsive switch to close, thereby energizing said solenoid, opening said valve means, and discharging said fire retardant material into said flue pipe.
Claim 3
Dependent Claim
24 words
The device of claim 1 including means for closing said valve means when said temperature in said flue pipe is below a preselected value.
Claim 4
Dependent Claim
14 words
The device of claim 1 wherein said fire retardant material is also fire extinguishing.
Claim 5
Dependent Claim
103 words
A fire controlling device for use with a thermally conductive flue pipe used for exhausting combustion byproducts from a combustion chamber comprising: a source of fire retardant material under pressure connected by conduit means exterior of said flue pipe to an opening into said flue pipe, said conduit means terminating at said opening, a normally closed valve means positioned in said conduit means automatically responsive to the temperature of said flue pipe, whereby an increase in the temperature of said flue pipe above a preselected level will cause said valve means to open, thereby admitting said fire retardant material into said flue pipe.
Claim 6
Dependent Claim
103 words
A fire controlling device for use with a thermally conductive flue pipe used for exhausting combustion byproducts from a combustion chamber comprising: a source of fire retardant material under pressure connected by conduit means exterior of said flue pipe to an opening into said flue pipe, said conduit means terminating at said opening, a normally closed valve means positioned in said conduit means automatically responsive to the temperature of said flue pipe, whereby an increase in the temperature of said flue pipe above a preselected level will cause said valve means to open, thereby admitting said fire retardant material into said flue pipe.
Claim 7
Dependent Claim
49 words
The device of claim 4 wherein said valve means includes a thermally responsive switch mounted on the exterior of said flue pipe and a valve control means, said switch operating said control means causing it to open said valve means upon the attainment of said flue pipe preselected temperature.
Claim 8
Dependent Claim
13 words
The device of claim 5 wherein said valve control means is a solenoid.
Claim 9
Dependent Claim
22 words
The device of claim 5 including means for closing said valve means when said flue pipe temperature is below said preselected temperature.
Claim 10
Dependent Claim
15 words
The device of claim 5 wherein said thermally responsive switch is an electrical thermostatic switch.
Claim 11
Dependent Claim
140 words
A fire controlling device for use with a thermally conductive flue pipe used for exhausting combustion byproducts from a combustion chamber comprising: a normally open electrical switch mounted on the exterior of said flue pipe to be responsive to the temperature of said flue pipe to automatically close when said flue pipe reaches a preselected elevated temperature, a source of fire retardant material under pressure connected by conduit means to a nozzle mounted on the exterior of said flue pipe and having an opening to the interior of said flue pipe, a valve means positioned in said conduit between said source of fire retardant material and said nozzle opening, and valve control means electrically connected to said electrical switch to open said valve means when said switch is closed and to close said valve means when said switch is open.
Claim 12
Dependent Claim
140 words
A fire controlling device for use with a thermally conductive flue pipe used for exhausting combustion byproducts from a combustion chamber comprising: a normally open electrical switch mounted on the exterior of said flue pipe to be responsive to the temperature of said flue pipe to automatically close when said flue pipe reaches a preselected elevated temperature, a source of fire retardant material under pressure connected by conduit means to a nozzle mounted on the exterior of said flue pipe and having an opening to the interior of said flue pipe, a valve means positioned in said conduit between said source of fire retardant material and said nozzle opening, and valve control means electrically connected to said electrical switch to open said valve means when said switch is closed and to close said valve means when said switch is open.
Claim 13
Dependent Claim
15 words
The device of claim 9 wherein said valve control means includes a spring biased solenoid.
References Cited (Backward Citations)
US2297808A
Cited
US2989348A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |