Patent US4336905A successfully refreshed from Google Patents.
US4336905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat recovery system
Assignee: Individual
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Filing: 1980-07-17
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Granted: 1982-06-29
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Expires: 2000-07-17
Abstract
Abstract An energy efficient heating system is provided for use with a fireplace or like means having a flue which recovers heat which is otherwise exhausted through the flue. The heating system comprises a heat collector in the form of a fluid conduit which is mounted within the flue and a housing positioned outside the fireplace. A holding tank having an open top is contained within the housing while the outlet from the fluid conduit is open to the tank. A drain on the tank forms a fluid outlet which is connected to the inlet of a heat exchanger while the heat exchange outlet is connected via a fluid pump to the inlet of the fluid conductor. Thus, upon activation of the fluid pump, a fluid, preferably water, is continually pumped through the fluid conduit while the exhaust gases passing through the flue heat the fluid. In addition, a fan is provided within the housing which circulates air through the heat exchanger and into the area which is to be heated.
Inventors
- 👤 James C. Langs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 17:22
CPC Classifications
F; F24; F24H; F24H3/00; F24H3/02; F24H3/06; F24H3/067; F24D; F24D12/00; F24D12/02; F24D2200/00; F24D2200/10; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
155 words
For use in conjunction with a fireplace means having a flue, a heating system comprising: a heat collector comprising fluid conduit means having an inlet and an outlet and means for mounting a portion of said fluid conduit means in the flue; a housing; a tank having an inlet and an outlet, said tank being positioned in said housing, said conduit outlet being connected to said tank inlet; heat exchanger means having an inlet and an outlet, said heat exchanger means outlet being connected to said conduit means inlet; means for fluidly connecting said tank outlet to said heat exchanger means inlet; means for pumping a fluid through said conduit means; fan means for moving air through said heat exchanger means and exteriorly of said housing; said tank having an open top; and said housing including means for establishing substantially unrestricted fluid communication between the open top of the tank and exteriorly of the housing.
Claim 2
Dependent Claim
155 words
For use in conjunction with a fireplace means having a flue, a heating system comprising: a heat collector comprising fluid conduit means having an inlet and an outlet and means for mounting a portion of said fluid conduit means in the flue; a housing; a tank having an inlet and an outlet, said tank being positioned in said housing, said conduit outlet being connected to said tank inlet; heat exchanger means having an inlet and an outlet, said heat exchanger means outlet being connected to said conduit means inlet; means for fluidly connecting said tank outlet to said heat exchanger means inlet; means for pumping a fluid through said conduit means; fan means for moving air through said heat exchanger means and exteriorly of said housing; said tank having an open top; and said housing including means for establishing substantially unrestricted fluid communication between the open top of the tank and exteriorly of the housing.
Claim 3
Dependent Claim
24 words
The invention as defined in claim 1 wherein said heat exchanger means, said pumping means and said fan means are contained within said housing.
Claim 4
Dependent Claim
43 words
The invention as defined in claim 1 and further comprising means for sensing the temperature of the interior of the flue and means responsive to said sensing means for activating said pump means when the temperature in the flue exceeds a predetermined temperature.
Claim 5
Dependent Claim
15 words
The invention as defined in claim 3 wherein said temperature sensing means comprises a thermocouple.
Claim 6
Dependent Claim
44 words
The invention as defined in claim 3 and further comprising means for sensing the temperature of fluid in the tank and means responsive to said last mentioned temperature sensing means for activating said pump means when the holding tank temperature exceeds a predetermined value.
Claim 7
Dependent Claim
20 words
The invention as defined in claim 1 wherein said tank outlet is positioned adjacent the lower end of the tank.
Claim 8
Dependent Claim
19 words
The invention as defined in claim 1 and further comprising means for controlling the speed of said fan means.
Claim 9
Dependent Claim
20 words
The invention as defined in claim 1 wherein said fluid conduit means is coiled in a helix in said flue.
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) | 1985-06-28 | 1985-12-28 | 1986-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-28 | 1989-12-28 | 1990-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-28 | 1993-12-28 | 1994-06-29 | $7700.00 | Window Closed / Lapsed |