US4232650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Baffled stove
Assignee: BAFFLE STOVE CO Inc
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Filing: 1977-08-30
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Granted: 1980-11-11
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Expires: 1997-08-30
Abstract
Abstract A Baffled Stove is described having a generally rectangular heating structure with its lower or bottom portion adapted to form a firebox for receiving fuel such as wood or coal. A primary air passageway is provided for introducing air into the heating structure at or near the level of the firebox. Controls are also provided to adjust the quantity of primary air introduced into the heating structure. A hinged door is mounted in the front door of the rectangular heating structure for introducing fuel into the firebox. A secondary air inlet is in communication with a conduit positioned in a plane horizontal to the firebox to provide a baffle for directing the flow of the products of combustion and also for preheating the secondary air as it passes therethrough. The preheated air exits at a point opposite to the secondary air inlet. The gases of combustion and smoke circulate circuitously through the fire chamber and comingles with the preheated secondary air as it exits from the horizontal conduit to produce additional or secondary burning. The unused air and final products of combustion are carried to the atmosphere through a flue outlet located at or near the top of the heating structure on a side opposite to the secondary air outlet.
Inventors
- 👤 Bruce A. Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:17
CPC Classifications
F; F24; F24B; F24B5/00; F24B5/02; F24B5/021; F24B5/026
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
168 words
A generally rectangular heating structure having two sides walls, a front wall, a back wall a top wall and a bottom wall wherein said bottom wall is adapted to form a firebox for receiving fuel, a primary air passageway for introducing air into said heating structure at a level near said firebox, a secondary air inlet vertical passageway wherein said passageway includes a vertical wall spaced from said back wall and fixed to said bottom wall and to said side walls and a horizontal passageway includes a pair of spaced apart horizontally positioned baffle plates sealed at their side ends to said side walls, and a flue outlet for carrying gases of combustion to the atmosphere, said vertical and horizontal passageways forming a continuous conduit whereby secondary air enters near the bottom of the vertical passageway for preheating and exits through an outlet in said horizontal passageway where said secondary air is combined with gases of combustion for secondary burning and circuitously flows outwardly through said flue outlet.
Claim 2
Dependent Claim
168 words
A generally rectangular heating structure having two sides walls, a front wall, a back wall a top wall and a bottom wall wherein said bottom wall is adapted to form a firebox for receiving fuel, a primary air passageway for introducing air into said heating structure at a level near said firebox, a secondary air inlet vertical passageway wherein said passageway includes a vertical wall spaced from said back wall and fixed to said bottom wall and to said side walls and a horizontal passageway includes a pair of spaced apart horizontally positioned baffle plates sealed at their side ends to said side walls, and a flue outlet for carrying gases of combustion to the atmosphere, said vertical and horizontal passageways forming a continuous conduit whereby secondary air enters near the bottom of the vertical passageway for preheating and exits through an outlet in said horizontal passageway where said secondary air is combined with gases of combustion for secondary burning and circuitously flows outwardly through said flue outlet.
Claim 3
Dependent Claim
21 words
The rectangular heating structure of claim 1 wherein said secondary air is heated to a temperature of at least 900° F.
Claim 4
Dependent Claim
31 words
The heating structure of claim 1 wherein said primary air passageway has a controlled opening in communication with a vertical passageway having an outlet opening at a level near said firebox.
Claim 5
Dependent Claim
32 words
The rectangular heating structure of claim 3 wherein said primary air passageway is positioned at a point near the junction of the front wall and the side wall of said heating structure.
Claim 6
Dependent Claim
40 words
The rectangular heating structure of claim 4 including a second vertical conduit for carrying primary air into said heating structure, said vertical conduit being positioned at the other junction of the front and side walls of said rectangular heating structure.
Claim 7
Dependent Claim
22 words
The heating structure of claim 1 wherein the outlet of said secondary air is on the opposite side of said flue outlet.
Claim 8
Dependent Claim
22 words
The heating structure of claim 6 including a door mounted on the heating structure front wall for introducing fuel into said firebox.
Claim 9
Dependent Claim
23 words
The heating structure of claim 7 wherein said heating structure is carried on four legs mounted to each corner of said heating structure.
Claim 10
Independent Claim
64 words
A method of burning fuel in a rectangular heating structure having a firebox area comprising introducing primary combustion air into said firebox, introducing a secondary preheated combustion air into said firebox, at a temperature in excess of 900° F. at a point where smoke and combustion gases generated during the primary combustion sequence passes prior to leaving said heating structure through a flue outlet.
Claim 11
Independent Claim
64 words
A method of burning fuel in a rectangular heating structure having a firebox area comprising introducing primary combustion air into said firebox, introducing a secondary preheated combustion air into said firebox, at a temperature in excess of 900° F. at a point where smoke and combustion gases generated during the primary combustion sequence passes prior to leaving said heating structure through a flue outlet.
Claim 12
Dependent Claim
54 words
The method of claim 9 whereby the secondary air is preheated by passing said air through a vertical channel and then into a horizontal channel positioned above said firebox level to insure that said secondary air is heated to a temperature of about 1100° F. prior to being introduced into the secondary combustion area.
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) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |