Patent US4347831A successfully refreshed from Google Patents.
US4347831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel burning stove
Assignee: Individual
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Filing: 1979-08-17
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Granted: 1982-09-07
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Expires: 1999-08-17
Abstract
Abstract A fuel burning stove or furnace wherein combustion of fuel is more complete resulting in a greater amount of heat generation and a cleaner combustion residue. The stove includes a stove housing defined by side walls and top and bottom walls and having an unobstructed combustion chamber. A flue has a flue passage to the combustion chamber at the lower portion thereof beneath the normal combustion area within the chamber. Unburned gaseous products of combustion rise toward the top of the chamber and are trapped and forced back downward through the chamber into the flue passage. As they pass again through the flame of combustion, the unburned products are burned. The result is more efficient combustion and a cleaner combustion residue. The residue is less pollutant and is safer in terms of avoiding chimney fires.
Inventors
- 👤 Peter Graziano
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:46
CPC Classifications
F; F24; F24B; F24B7/00; F24B7/02; F24B7/025; F24B5/00; F24B5/02; F24B5/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
238 words
A stove comprising: a stove housing having top and bottom walls and side walls defining an unobstructed combustion chamber having a combustion area located intermediate between the top and bottom walls; a grate for holding fuel in the combustion chamber located beneath the combustion area for combustion of fuel in the combustion area; a flue including flue wall means spaced from one of the stove housing side walls and defining a flue chamber and an upper flue opening for exhaust of products of combustion, said one side wall having a bottom edge spaced from the grate to provide a flue passage in communication with the combustion chamber and the flue chamber at a location beneath the combustion area in the combustion chamber; a damper opening located in one of said stove housing walls at a location above the combustion area, open to the flue chamber, and a closeable damper normally closing the damper opening and means to control the position of the damper with respect to the damper opening; a draft inlet means to the combustion chamber to admit draft to the combustion chamber, said draft inlet means located at a position below the flue passage; and a cabinet surrounding the stove housing having cabinet walls spaced from the wall means and means for circulation of air in the space between the cabinet walls and the housing walls to warm said air and return it to the room.
Claim 2
Dependent Claim
238 words
A stove comprising: a stove housing having top and bottom walls and side walls defining an unobstructed combustion chamber having a combustion area located intermediate between the top and bottom walls; a grate for holding fuel in the combustion chamber located beneath the combustion area for combustion of fuel in the combustion area; a flue including flue wall means spaced from one of the stove housing side walls and defining a flue chamber and an upper flue opening for exhaust of products of combustion, said one side wall having a bottom edge spaced from the grate to provide a flue passage in communication with the combustion chamber and the flue chamber at a location beneath the combustion area in the combustion chamber; a damper opening located in one of said stove housing walls at a location above the combustion area, open to the flue chamber, and a closeable damper normally closing the damper opening and means to control the position of the damper with respect to the damper opening; a draft inlet means to the combustion chamber to admit draft to the combustion chamber, said draft inlet means located at a position below the flue passage; and a cabinet surrounding the stove housing having cabinet walls spaced from the wall means and means for circulation of air in the space between the cabinet walls and the housing walls to warm said air and return it to the room.
Claim 3
Dependent Claim
26 words
The stove of claim 1 wherein: said draft inlet means includes draft inlet pipes extended through the cabinet and through the stove walls into the chamber.
Claim 4
Dependent Claim
34 words
The stove of claim 1 including: an electric motor and a blower mounted in the cabinet to circulate room air to be warmed in the space between the cabinet walls and the wall means.
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) | 1985-09-06 | 1986-03-08 | 1986-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-09-06 | 1990-03-08 | 1990-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-09-06 | 1994-03-08 | 1994-09-07 | $7700.00 | Window Closed / Lapsed |