US4327670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Waste heat recovery unit
Assignee: Individual
•
Filing: 1980-05-30
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Granted: 1982-05-04
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Expires: 2000-05-30
Abstract
Abstract An apparatus for the recovery of heat from waste gases is disclosed. The apparatus generally comprises a heat recovery coil which is located above the combustion chamber of a furnace and in the path of waste gases psssing through a flue, a circulation pump and an expansion manifold. The apparatus is equally useful in new as well as retrofitted applications.
Inventors
- 👤 Charles J. Teller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:19
CPC Classifications
F; F28; F28D; F28D21/00; F28D21/0001; F28D21/0003; F28D21/0005; F28D21/0007; F24; F24D; F24D12/00; F24D12/02; F24D2200/00; F24D2200/04; F24D2200/16; F24D2200/18; Y; Y02; Y02B; Y02B10/00; Y02B10/70; Y02B30/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
190 words
In a water heating system which includes a boiler means for heating the water within said system, a first conduit means for removing heated water from said boiler, a second conduit means for returning said water to said boiler and an exhaust flue for discharging waste products of combustion from said system, an apparatus for recovering heat from said waste products of combustion, said apparatus comprising: a coil of heat conductive material positioned within said exhaust flue, said coil having an inlet and an outlet; first means for diverting water from said water in said second conduit means for returning water to said boiler to the input of said coil; manifold means, having an input side and an output side; first means for directing said diverted water from the outlet of said coil to said manifold means input side; second means for diverting said diverted water from said manifold means output side to said boiler; an expansion valve is mounted in line between said manifold means output side and said boiler; and said manifold means further comprises a split output whereby a bleeder valve is mounted on said output side.
Claim 2
Dependent Claim
190 words
In a water heating system which includes a boiler means for heating the water within said system, a first conduit means for removing heated water from said boiler, a second conduit means for returning said water to said boiler and an exhaust flue for discharging waste products of combustion from said system, an apparatus for recovering heat from said waste products of combustion, said apparatus comprising: a coil of heat conductive material positioned within said exhaust flue, said coil having an inlet and an outlet; first means for diverting water from said water in said second conduit means for returning water to said boiler to the input of said coil; manifold means, having an input side and an output side; first means for directing said diverted water from the outlet of said coil to said manifold means input side; second means for diverting said diverted water from said manifold means output side to said boiler; an expansion valve is mounted in line between said manifold means output side and said boiler; and said manifold means further comprises a split output whereby a bleeder valve is mounted on said output side.
Claim 3
Dependent Claim
14 words
The apparatus of claim 1 wherein: said coil of heat conductive material is metallic.
Claim 4
Dependent Claim
23 words
The apparatus of claim 1 further comprising: means for pumping water diverted from said second conduit to the input side of said coil.
Claim 5
Dependent Claim
18 words
The apparatus of claim 1 wherein: said manifold means output side is in communication with an expansion tank.
References Cited (Backward Citations)
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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) | 1985-05-03 | 1985-11-02 | 1986-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-05-03 | 1989-11-02 | 1990-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-05-03 | 1993-11-02 | 1994-05-04 | $7700.00 | Window Closed / Lapsed |