US3976048A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireplace structure
Assignee: Individual
•
Filing: 1974-09-16
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Granted: 1976-08-24
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Expires: 1994-09-16
Abstract
Abstract A draft control means is provided for a fireplace structure in which a firebox is provided, which firebox forms a heat generating chamber. The specific improvement provides outside air induction into the firebox proper so as not to rob the room being heated from air which would normally go up the flue.
Inventors
- 👤 Robert G. Ashman, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:43
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/189; F24B1/19
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
In a fireplace having an upwardly directed flue, a structure having an external housing with rear and side walls, a firebox having top, side, rear and bottom walls with an open front set within the structure to form a heat generating chamber, a closure for said open front impeding air flow into said firebox, a hearth, a duct leading from a source of outside air to said hearth, a hood capping said duct comprising generally horizontally extending top wall and three side walls downwardly extending from said top wall and an open side adjacent and below said closure for generally horizontal passage of air from said duct to the firebox at a location adjacent and above and along the bottom wall of the firebox at the frontal portion thereof, means on said hood supporting said closure for sliding movement.
Claim 2
Dependent Claim
139 words
In a fireplace having an upwardly directed flue, a structure having an external housing with rear and side walls, a firebox having top, side, rear and bottom walls with an open front set within the structure to form a heat generating chamber, a closure for said open front impeding air flow into said firebox, a hearth, a duct leading from a source of outside air to said hearth, a hood capping said duct comprising generally horizontally extending top wall and three side walls downwardly extending from said top wall and an open side adjacent and below said closure for generally horizontal passage of air from said duct to the firebox at a location adjacent and above and along the bottom wall of the firebox at the frontal portion thereof, means on said hood supporting said closure for sliding movement.
Claim 3
Dependent Claim
28 words
In a structure as in claim 1 said closure substantially closing the opening defined by the free edges of the top, side and bottom walls of the firebox.
Claim 4
Dependent Claim
22 words
In a structure as in claim 1 wherein the outlet of the hood extends substantially across the bottom wall of the firebox.
Claim 5
Dependent Claim
14 words
In a structure as in claim 2 wherein said closure includes a translucent screen.
Claim 6
Dependent Claim
42 words
In a structure as in claim 4 wherein said closure is supported at its lower edge by a trough for sliding movement therein and gasket means are provided about the edge thereof to seal the closure against the opening to the firebox.
Claim 7
Dependent Claim
29 words
In a structure as in claim 5 wherein means permits the top edge of the closure to rock away from the sealing gasket for sliding movement of the closure.
References Cited (Backward Citations)
US2470430A
Cited
GB651856A
Cited
US2776707A
Cited
US2819711A
Cited
US3616788A
Cited
US3845754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-24 | 1980-02-23 | 1980-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-24 | 1984-02-23 | 1984-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-24 | 1988-02-23 | 1988-08-24 | $7700.00 | Window Closed / Lapsed |