US4210102A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Space heater heat recovery system
Assignee: DOSMANN ENTERPRISES Inc
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Filing: 1978-11-17
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Granted: 1980-07-01
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Expires: 1998-11-17
Abstract
Abstract A space heater with a heat recovery system in which the exhaust gases from the hot air furnace are passed through a heat exchanger in which a set of water heating coils is disposed. The set of coils is connected to a hot water holding tank which is in turn connected to a bank of heat exchanger coils in the heated air outlet of the furnace. A damper is provided in the exhaust pipe of the furnace and a pipe connects the exhaust pipe on the anterior side of the damper with the heat exchanger, and a pipe connects the chamber with the exhaust pipe on the posterior side of the damper. A pump is provided for circulating the water between the first set of coils and the holding tank, and a fan forces the air form the exhaust pipe through the chamber in the heat exchanger. The pump and fan are controlled by a switch responsive to the operation of the furnace. The holding tank may be used to heat water supplied to a hot water heater of a hot water supply system.
Inventors
- 👤 Joseph B. Dosmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:08
CPC Classifications
F; F24; F24H; F24H6/00; F24D; F24D17/00; F24D17/0005; F24D17/001; Y; Y02; Y02B; Y02B30/00; Y02B30/18; Y10; Y10S; Y10S165/00; Y10S165/901
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
199 words
In a space heating system having a hot air, fuel fired furnace with a cold air inlet passage and a hot air outlet passage, a heat recovery system: comprising an exhaust pipe for connecting the furnace to a flue, a damper in said exhaust pipe, a heat exchanger unit having a chamber and a set of water coils therein, said heat exchanger unit being located at least in part below said exhaust pipe, a pipe connected to said exhaust pipe on the anterior side of said damper and extending downwardly to the lower portion of said chamber, a pipe connecting the upper part of said chamber with said exhaust pipe on the posterior side of said damper, a water holding tank, upper and lower conduits connecting said tank with said set of coils, a bank of coils in one of said passages of the furnace, a fan for forcing the furnace exhaust gases through said downwardly extending pipe and the chamber in said heat exchanger unit and returning the gases to said exhaust pipe and water supply and return conduits connecting said holding tanks with said bank of coils heating the air flowing to the space to be heated.
Claim 2
Dependent Claim
199 words
In a space heating system having a hot air, fuel fired furnace with a cold air inlet passage and a hot air outlet passage, a heat recovery system: comprising an exhaust pipe for connecting the furnace to a flue, a damper in said exhaust pipe, a heat exchanger unit having a chamber and a set of water coils therein, said heat exchanger unit being located at least in part below said exhaust pipe, a pipe connected to said exhaust pipe on the anterior side of said damper and extending downwardly to the lower portion of said chamber, a pipe connecting the upper part of said chamber with said exhaust pipe on the posterior side of said damper, a water holding tank, upper and lower conduits connecting said tank with said set of coils, a bank of coils in one of said passages of the furnace, a fan for forcing the furnace exhaust gases through said downwardly extending pipe and the chamber in said heat exchanger unit and returning the gases to said exhaust pipe and water supply and return conduits connecting said holding tanks with said bank of coils heating the air flowing to the space to be heated.
Claim 3
Dependent Claim
49 words
A space heater with a heat recovery system as defined in claim 1 in which a pump is disposed in one of said upper and lower conduits connecting said tank with said set of coils, and thermostatic switch means responsive to the operation of said furnace controls said pump.
Claim 4
Dependent Claim
37 words
A space heater with a heat recovery system as defined in claim 1 in which a pump is disposed in one of the water supply and return conduits connecting the holding tank with said bank of coils.
Claim 5
Dependent Claim
37 words
A space heater with a heat recovery system as defined in claim 2 in which a pump is disposed in one of the water supply and return conduits connecting the holding tank with said bank of coils.
Claim 6
Dependent Claim
63 words
A space heater with a heat recovery system as defined in claim 1 in which a hot water supply tank is included in the system, and a cold water supply conduit connects said holding tank with a source of water; a conduit connects said holding tank with said hot water supply tank; and a conduit delivers water from said hot water supply tank.
Claim 7
Dependent Claim
63 words
A space heater with a heat recovery system as defined in claim 4 in which a hot water supply tank is included in the system and a cold water supply conduit connects said holding tank with a source of water; a conduit connects said holding tank with said hot water supply tank; and a conduit delivers water from said hot water supply tank.
Claim 8
Dependent Claim
33 words
A space heater with a heat recovery system as defined in claim 1 in which said set of coils has two sections which can be used separately or in combination with one another.
Claim 9
Dependent Claim
36 words
A space heater with a heat recovery system as defined in claim 5 in which a pump is disposed in one of the water supply return conduits connecting the holding tank with said bank of coils.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-07-01 | 1983-12-31 | 1984-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-01 | 1987-12-31 | 1988-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-01 | 1991-12-31 | 1992-07-01 | $7700.00 | Window Closed / Lapsed |