Patent US4438340A successfully refreshed from Google Patents.
US4438340A
Expired / Lapsed
US
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Domestic electric generator and steam heating plant
Assignee: Individual
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Filing: 1981-11-05
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Granted: 1984-03-20
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Expires: 2001-11-05
Abstract
Abstract A method and apparatus for generating heat and electricity for domestic use including generating hot air heat and steam heat, and utilizing the steam to operate a turbine/generator. When the generator's output reaches a predetermined level, the electricity coming from outside the building is disconnected, and the generator supplies at least a portion of the building's needs or feeds electricity back into the power grid.
Inventors
- 👤 Dennis L. Armiger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:50
CPC Classifications
F; F24; F24D; F24D5/00; F01; F01K; F01K17/00; F01K17/02; Y; Y02; Y02B; Y02B30/00; Y02E; Y02E20/00; Y02E20/14
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A method of generating heat and electricity for building use comprising: (a) providing a furnace having a plenum chamber with a combustion chamber therein, said furnace generating hot air; (b) placing a steam generating boiler in said combustion chamber; (c) connecting a turbine to said boiler, passing the steam from said turbine through coils in said plenum chamber in said furnace to supply a secondary heating source; (d) said turbine driving an electric generator; and (e) feeding electricity from said generator into the building's electrical service.
Claim 2
Independent Claim
86 words
A method of generating heat and electricity for building use comprising: (a) providing a furnace having a plenum chamber with a combustion chamber therein, said furnace generating hot air; (b) placing a steam generating boiler in said combustion chamber; (c) connecting a turbine to said boiler, passing the steam from said turbine through coils in said plenum chamber in said furnace to supply a secondary heating source; (d) said turbine driving an electric generator; and (e) feeding electricity from said generator into the building's electrical service.
Claim 3
Dependent Claim
54 words
A method as defined in claim 1 including: (a) measuring the pressure between said boiler and said turbine; (b) extinguishing a burner in said combustion chamber when the pressure between said boiler and said turbine reaches a first predetermined level; and (c) reactivating said burner when the pressure drops to a second predetermined level.
Claim 4
Dependent Claim
34 words
A method as defined in claim 1 including: (a) capturing the steam from said turbine in a condensate tank/reservoir; and (b) maintaining the water level and temperature at predetermined levels in said condensate tank/reservoir.
Claim 5
Dependent Claim
34 words
A method as defined in claim 3 including measuring the water level in said boiler, and replenishing water from said condensate tank/reservoir if the water level in said boiler falls below a predetermined level.
Claim 6
Dependent Claim
21 words
A method as defined in claim 1, including feeding power exterior to the building through electricity lines coming into the building.
Claim 7
Dependent Claim
25 words
A method as defined in claim 1 including disconnecting electricity lines coming into the building when the output from said generator reaches a predetermined level.
Claim 8
Dependent Claim
16 words
A method as defined in claim 1 including feeding electricity back into the local power grid.
Claim 9
Dependent Claim
111 words
An electric generator and heating plant for building use comprising: (a) a hot air furnace having a plenum and a combustion chamber therein; (b) a burner in said combustion chamber; (c) a boiler positioned in said combustion chamber above said burner; (d) a turbine connected to said boiler; (e) a condensate tank/reservoir connected to said turbine and means for maintaining the water level and temperature therein at predetermined levels, coil means in said plenum connected between said turbine and said condensate tank/reservoir; (f) an electric generator connected to and driven by said turbine; and (g) means for receiving electricity from outside the building; and means for distributing it to the building.
Claim 10
Dependent Claim
111 words
An electric generator and heating plant for building use comprising: (a) a hot air furnace having a plenum and a combustion chamber therein; (b) a burner in said combustion chamber; (c) a boiler positioned in said combustion chamber above said burner; (d) a turbine connected to said boiler; (e) a condensate tank/reservoir connected to said turbine and means for maintaining the water level and temperature therein at predetermined levels, coil means in said plenum connected between said turbine and said condensate tank/reservoir; (f) an electric generator connected to and driven by said turbine; and (g) means for receiving electricity from outside the building; and means for distributing it to the building.
Claim 11
Dependent Claim
46 words
A plant as defined in claim 8 including means for measuring the pressure between said boiler and said turbine, and means for extinguishing said burner when said pressure reaches a first predetermined level and reactivating said burner when the pressure drops to a second predetermined level.
Claim 12
Dependent Claim
37 words
A plant as defined in claim 8 including means for measuring the water level in said boiler and replenishing the water from said condensate tank/reservoir if the water level in said boiler falls below a predetermined level.
Claim 13
Dependent Claim
25 words
A plant as defined in claim 8 including means for disconnecting said electricity receiving means when the output of said generator reaches a predetermined level.
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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) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |