Patent US3926174A successfully refreshed from Google Patents.
US3926174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireplace structure
Assignee: Individual
•
Filing: 1974-02-21
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Granted: 1975-12-16
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Expires: 1994-02-21
Abstract
Abstract A fireplace of sheet metal construction having a firebox with the rear wall of a reverse curve construction to provide a convex reflecting surface for radiating heat into the living space, and a hearth having an air discharge opening connected to outside air for providing an inflow of air to the fireplace to satisfy draft requirements. A housing is disposed around the firebox and an air passage containing baffles is disposed therein for either up or down flow of air to provide supplemental heating for the room. A generally U-shaped upstanding wall may be provided around the hearth in which the opening for outside air is disposed, whereby the air is directed over the surface of the hearth to the lower portion of the firebox at the base of the fire.
Inventors
- 👤 Ralph E Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:09
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
200 words
A prefabricated movable fireplace structure comprising walls defining a housing having a bottom, two side walls and a rear wall, a firebox in said housing having a bottom, two side walls and a rear wall of sheet metal and an open front, said firebox walls being spaced from the respective walls of said housing to form an air passageway beneath and at the sides and back of the firebox to heat the air in the passageway, and to provide an insulating effect for the walls and bottom of the housing, baffles joined integrally with the rear wall of said firebox and disposed in said passageway along the back of said firebox for dissipating heat from the firebox into the air flowing in said passageway, means forming outlets near the bottom for directing heated air outwardly at a low level from said passageway, blower means for moving the air downwardly in said passageway around said baffles, a flue connected to said firebox and extending upwardly therefrom, and a hearth disposed in front of said firebox and having an air conduit means with an outlet opening facing the front of the firebox for supplying air from an outside source to the firebox.
Claim 2
Dependent Claim
200 words
A prefabricated movable fireplace structure comprising walls defining a housing having a bottom, two side walls and a rear wall, a firebox in said housing having a bottom, two side walls and a rear wall of sheet metal and an open front, said firebox walls being spaced from the respective walls of said housing to form an air passageway beneath and at the sides and back of the firebox to heat the air in the passageway, and to provide an insulating effect for the walls and bottom of the housing, baffles joined integrally with the rear wall of said firebox and disposed in said passageway along the back of said firebox for dissipating heat from the firebox into the air flowing in said passageway, means forming outlets near the bottom for directing heated air outwardly at a low level from said passageway, blower means for moving the air downwardly in said passageway around said baffles, a flue connected to said firebox and extending upwardly therefrom, and a hearth disposed in front of said firebox and having an air conduit means with an outlet opening facing the front of the firebox for supplying air from an outside source to the firebox.
Claim 3
Dependent Claim
31 words
A fireplace structure as defined in claim 1 in which an upstanding wall of generally U-shaped configuration surrounds the hearth and contains said outlet opening facing the front of the firebox.
Claim 4
Dependent Claim
35 words
A fireplace structure as defined in claim 2 in which said baffles are provided with openings therethrough and are disposed horizontally in said air passageway to create a circuitous flow of air through said passageway.
Claim 5
Dependent Claim
45 words
A fireplace structure as defined in claim 3 in which the rear wall of said fireplace has a reverse curve therein providing a convex forwardly facing surface in the upper portion thereof for radiating heat to the living space in which the fireplace is located.
Claim 6
Dependent Claim
35 words
A fireplace Structure as defined in claim 1 in which said baffles are provided with openings therein and are disposed horizontally in said air passageway to create a circuitous flow of air through said passageway.
Claim 7
Dependent Claim
43 words
A fireplace structure as defined in claim 5 in which walls define a passage above said housing forming an extension of said air passage in close proximity to the flue above said housing and an opening near the top thereof for air flow.
Claim 8
Dependent Claim
22 words
A fireplace structure as defined in claim 1 in which the walls of said housing and hearth are constructed of sheet metal.
Claim 9
Dependent Claim
45 words
A fireplace structure as defined in claim 1 in which the rear wall of said fireplace has a reverse curve therein providing a convex forwardly facing surface in the upper portion thereof for radiating heat to the living space in which the fireplace is located.
Claim 10
Dependent Claim
20 words
A fireplace structure as defined in claim 1 in which a port for outside air is located within the 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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |