US4392477A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid fuel burning stove
Assignee: Individual
•
Filing: 1981-04-29
•
Granted: 1983-07-12
•
Expires: 2001-04-29
Abstract
Abstract A freestanding stove is provided including an elevated firebox mounted atop a tubular pedestal having a horizontally enlarged downwardly opening hollow base at its lower end. The firebox includes a combustion air inlet opening downwardly into the pedestal and the lower end of the pedestal opens downwardly into the hollow base which includes a damper for controlling the flow of combustion air from within the hollow base into the lower end of the pedestal. The base includes feet supporting the base a spaced distance above a horizontal surface upon which the feet rest and the feet are removable whereby the base may rest directly upon and over a horizontal support surface upwardly through which a combustion air opening is formed. The front of the firebox includes an openable transparent window equipped door and combustion air inlet passage structure for sweeping curtains of combustion air across the inner surface of the window from selected marginal portions thereof. The firebox further includes first, second and third stage combustion air inlets and the rear of the firebox includes a reversible smoke outlet fitting whereby the by-products of combustion may exhaust directly into either a horizontal or vertical outlet pipe. The door is reversibly mounted on the front of the firebox and rear upwardly extending exterior surfaces of the firebox include air blower structure operatively associated therewith for blowing ambient air across the firebox surfaces in intimate heat transfer relation therewith.
Inventors
- 👤 Orley J. Milligan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:40
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/181; F24B5/00; F24B5/02; F24B5/021; F24B5/023; F24B7/00; F24B7/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
192 words
A heater including a firebox for receiving and burning solid fuel therein, said firebox including a lower wall, a pair of spaced upstanding opposite side walls, a top wall extending between said side walls, a forwardly opening semi-cylindrical rear wall extending between said top and lower walls and between said opposite side walls and combustion air inlet manifold means into which a combustion air inlet means opens, said firebox including a forward portion in which a hollow peripheral frame is mounted, said frame extending peripherally about at least a majority of the inside periphery of the forward portion of said firebox, said combustion air manifold means including a portion thereof opening into the interior of said frame, said frame including air curtain forming air outlet openings formed therein and spaced peripherally thereabout opening inwardly of the corresponding peripheral portion of said frame, a door assembly removably closing the forward portion of said firebox, said door having a heat resistant transparent window therein, said air curtain forming outlets openings being disposed closely rearward of said window and being operative to discharge a curtain of combustion air across the inner surface of said window.
Claim 2
Dependent Claim
192 words
A heater including a firebox for receiving and burning solid fuel therein, said firebox including a lower wall, a pair of spaced upstanding opposite side walls, a top wall extending between said side walls, a forwardly opening semi-cylindrical rear wall extending between said top and lower walls and between said opposite side walls and combustion air inlet manifold means into which a combustion air inlet means opens, said firebox including a forward portion in which a hollow peripheral frame is mounted, said frame extending peripherally about at least a majority of the inside periphery of the forward portion of said firebox, said combustion air manifold means including a portion thereof opening into the interior of said frame, said frame including air curtain forming air outlet openings formed therein and spaced peripherally thereabout opening inwardly of the corresponding peripheral portion of said frame, a door assembly removably closing the forward portion of said firebox, said door having a heat resistant transparent window therein, said air curtain forming outlets openings being disposed closely rearward of said window and being operative to discharge a curtain of combustion air across the inner surface of said window.
Claim 3
Dependent Claim
13 words
The combination of claim 1 wherein said frame is inverted U-shaped in configuration.
Claim 4
Dependent Claim
86 words
The combination of claim 1 including a depending transverse smoke flap extending transversely of the upper forward portion of the interior of said firebox immediately rearward of the upper portion of said frame and including upper and lower marginal edge portions disposed above and below, respectively, the lower margin of the upper portion of said frame, said upper marginal edge portion of said smoke flap being hingedly supported relative to said firebox for rearward and upward swinging of the lower marginal edge of said smoke flap.
Claim 5
Dependent Claim
93 words
The combination of claim 1 wherein the upper central portion of said rear wall includes a smoke outlet, said smoke outlet including an oval transversely arcuate outlet fitting removably secured over the external surfaces of said semi-cylindrical rear wall about said smoke outlet, said fitting being removably supported from said rear wall for 180° reversal in position of said fitting relative to said rear wall, said fitting including an outwardly projecting outlet nipple supported therefrom, said nipple being horizontally and vertically disposed when said fitting is disposed in alternate 180° reversed positions thereof.
Claim 6
Dependent Claim
186 words
A heater including a firebox for receiving and burning solid fuel therein, said firebox including a lower wall, a pair of spaced upstanding opposite side walls, a top wall extending between said side walls, a forwardly opening semi-cylindrical rear wall extending between said top and lower walls and said opposite side walls and combustion air manifold means into which a combustion air inlet opens, said firebox including a forward portion in which a hollow peripheral frame is mounted, said frame extending peripherally about at least a majority of the inside periphery of the forward portion of said firebox, said combustion air manifold means including a portion thereof opening into the interior of said frame, said frame including air curtain forming outlet openings formed therein and spaced peripherablly thereabout opening inwardly of the corresponding peripheral portions of said frame, a door assembly removably closing the forward portion of said firebox, said door assembly being hingedly supported from said firebox for horizontal swinging between open and closed positions thereof and being provided with a transparent window across whose inner surface said air curtains sweep from said outlet openings.
Claim 7
Dependent Claim
186 words
A heater including a firebox for receiving and burning solid fuel therein, said firebox including a lower wall, a pair of spaced upstanding opposite side walls, a top wall extending between said side walls, a forwardly opening semi-cylindrical rear wall extending between said top and lower walls and said opposite side walls and combustion air manifold means into which a combustion air inlet opens, said firebox including a forward portion in which a hollow peripheral frame is mounted, said frame extending peripherally about at least a majority of the inside periphery of the forward portion of said firebox, said combustion air manifold means including a portion thereof opening into the interior of said frame, said frame including air curtain forming outlet openings formed therein and spaced peripherablly thereabout opening inwardly of the corresponding peripheral portions of said frame, a door assembly removably closing the forward portion of said firebox, said door assembly being hingedly supported from said firebox for horizontal swinging between open and closed positions thereof and being provided with a transparent window across whose inner surface said air curtains sweep from said outlet openings.
Claim 8
Dependent Claim
31 words
The combination of claim 5 wherein said door assembly and firebox include reversibly positionable hinge and hinge mounting means for hingedly supporting said door from either side portion of said firebox.
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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) | 1986-07-11 | 1987-01-10 | 1987-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-11 | 1991-01-10 | 1991-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-11 | 1995-01-10 | 1995-07-12 | $7700.00 | Window Closed / Lapsed |