US4254756A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireplace apparatus
Assignee: Individual
•
Filing: 1979-06-20
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Granted: 1981-03-10
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Expires: 1999-06-20
Abstract
Abstract Fireplace apparatus insertable into an existing fireplace, and compatible with an existing chimney structure includes a double wall on the sides and at the back of a firebox and two separate air systems are provided, one system for combustion air and a second system for heated air. The combustion air moves vertically through hollow grates on which fuel is disposed for burning, and vertically through the firebox and by heat exchanger tubes and into a chimney.
Inventors
- 👤 William T. Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:00
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/189; F24B1/19; F24B1/1902; F24B1/188; F24B1/1885; F24B1/1886
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
255 words
Prefabricated fireplace apparatus insertable into a preexisting masonry fireplace in a building for heating air in a room, comprising, in combination: a combustion chamber; a first heated air chamber means disposed adjacent the combustion chamber for receiving a first flow of air from the room to be heated; second air chamber means disposed adjacent the combustion chamber for receiving a second flow of air from the room to be heated; manifold means for receiving a third flow of air from the room to be heated; third air chamber means disposed adjacent the combustion chamber for receiving the third flow of air from the room to be heated, and disposed between and communicating with the first and second air chamber means; fourth air chamber means disposed above the combustion chamber for receiving a flow of heated air from the third air chamber; duct means extending between the third and fourth air chambers through which the heated air flows from the third air chamber means to the fourth air chamber means; grate means extending between the manifold means and the third air chamber means through which the third flow of air flows from the manifold means to the third air chamber means; means for providing a flow of outside air to the combustion chamber; air valve means for controlling the flow of outside air to the combustion chamber; and door means for separating the first, second, and third flows of air in and from the room to be heated from the combustion air in the combustion chamber.
Claim 2
Dependent Claim
255 words
Prefabricated fireplace apparatus insertable into a preexisting masonry fireplace in a building for heating air in a room, comprising, in combination: a combustion chamber; a first heated air chamber means disposed adjacent the combustion chamber for receiving a first flow of air from the room to be heated; second air chamber means disposed adjacent the combustion chamber for receiving a second flow of air from the room to be heated; manifold means for receiving a third flow of air from the room to be heated; third air chamber means disposed adjacent the combustion chamber for receiving the third flow of air from the room to be heated, and disposed between and communicating with the first and second air chamber means; fourth air chamber means disposed above the combustion chamber for receiving a flow of heated air from the third air chamber; duct means extending between the third and fourth air chambers through which the heated air flows from the third air chamber means to the fourth air chamber means; grate means extending between the manifold means and the third air chamber means through which the third flow of air flows from the manifold means to the third air chamber means; means for providing a flow of outside air to the combustion chamber; air valve means for controlling the flow of outside air to the combustion chamber; and door means for separating the first, second, and third flows of air in and from the room to be heated from the combustion air in the combustion chamber.
Claim 3
Dependent Claim
26 words
The apparatus of claim 1 in which the duct means comprises a plurality of ducts spaced apart from each other and disposed over the combustion chamber.
Claim 4
Dependent Claim
45 words
The apparatus of claim 2 in which the grate means comprises a plurality of hollow grates disposed beneath the combustion chamber and spaced apart to allow the outside air to flow from the air valve means to the combustion chamber between the spaced apart grates.
Claim 5
Dependent Claim
47 words
The apparatus of claim 3 in which the manifold means extends between the first air chamber means and the second air chamber means and includes a top panel, a front panel, and a rear panel, and the front and rear panels are connected to the top panel.
Claim 6
Dependent Claim
42 words
The apparatus of claim 4 in which the first air chamber means includes a first horizontally extending baffle and a first vertically extending panel secured together for controlling the first flow of air into and out of the first air chamber means.
Claim 7
Dependent Claim
42 words
The apparatus of claim 5 in which the second air chamber means includes a second horizontally extending baffle and a second vertically extending panel secured together for controlling the second flow of air into and out of the second air chamber means.
Claim 8
Dependent Claim
122 words
The apparatus of claim 1 in which the door means includes frame means for supporting a panel of glass; hinge means secured to the frame means; panel means secured to the hinge means remote from the frame means for pivotally securing the frame means to the combustion chamber; side facing means secured to the panel means for providing a seal between the frame means and the combustion chamber; door jamb means for providing a further seal between the frame means and the combustion chamber, and including an upper door jamb, and a lower door jamb; an upper facing for sealing the upper door jamb and the combustion chamber; and a lower facing for sealing the lower door jamb and the combustion chamber.
Claim 9
Dependent Claim
26 words
The apparatus of claim 7 in which the frame means includes a first door frame and a second door frame pivotally secured to the combustion chamber.
Claim 10
Dependent Claim
56 words
The apparatus of claim 8 in which the hinge means and the panel means include a first and a second hinge secured respectively to the first and second door frames, and a first and second panel secured respectively to the first and second hinges for securing the first and second door frames to the combustion chamber.
Claim 11
Dependent Claim
28 words
The apparatus of claim 9 in which the first and second door frames are pivotally secured to the combustion chamber adjacent the first and second air chambers, respectively.
Claim 12
Dependent Claim
36 words
The apparatus of claim 1 in which the grate means includes a plurality of hollow grates and tray means disposed beneath the plurality of hollow grates for receiving ashes from combustion within the combustion chamber means.
Claim 13
Dependent Claim
41 words
The apparatus of claim 11 in which the tray means is spaced apart from the plurality of hollow grates to allow the air from the air valve means to flow above the tray means and between the spaced apart hollow grates.
Claim 14
Dependent Claim
46 words
The apparatus of claim 12 in which the tray means includes a front panel which is disposed against the rear panel of the manifold means for sealing the third flow of air from the flow of air through the air valve means to the combustion chamber.
Claim 15
Dependent Claim
120 words
Door apparatus for the combustion chamber of a fireplace, comprising, in combination: frame means; glass means secured to the frame means; hinge means secured to the frame means and to the fireplace for pivotally securing the frame means to the fireplace; side facing means secured to the hinge means for providing a seal between the frame means and the combustion chamber; door jamb means for sealing the frame means adjacent the side facing means, and including an upper door jamb, and a lower door jamb; an upper facing for sealing the frame means at the upper door jamb and the combustion chamber; and a lower facing for sealing the frame means at the lower door jamb and the combustion chamber.
Claim 16
Dependent Claim
120 words
Door apparatus for the combustion chamber of a fireplace, comprising, in combination: frame means; glass means secured to the frame means; hinge means secured to the frame means and to the fireplace for pivotally securing the frame means to the fireplace; side facing means secured to the hinge means for providing a seal between the frame means and the combustion chamber; door jamb means for sealing the frame means adjacent the side facing means, and including an upper door jamb, and a lower door jamb; an upper facing for sealing the frame means at the upper door jamb and the combustion chamber; and a lower facing for sealing the frame means at the lower door jamb and the combustion chamber.
Claim 17
Dependent Claim
48 words
The apparatus of claim 14 in which the frame means includes a first door frame and a second door frame, both pivotally secured to the fireplace, and the glass means includes a first and a second panel of glass secured respectively to the first and second door frames.
Claim 18
Dependent Claim
52 words
The apparatus of claim 15 in which the hinge means includes a first and a second hinge secured respectively to the first and second door frames, and a first and a second panel secured respectively to the first and second hinges for securing the first and second door frames to the fireplace.
References Cited (Backward Citations)
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Cited
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Cited
CA1014810A
Cited
US4015581A
Cited
US3995612A
Cited
US4183347A
Cited
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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) | 1984-03-09 | 1984-09-08 | 1985-03-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-09 | 1988-09-08 | 1989-03-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-09 | 1992-09-08 | 1993-03-10 | $7700.00 | Window Closed / Lapsed |