US4574773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireplace hearth
Assignee: Individual
•
Filing: 1984-08-07
•
Granted: 1986-03-11
•
Expires: 2004-08-07
Abstract
Abstract The hearth includes a hood composed on the one hand of a first screen 5b extending obliquely from the top of the hearth opening towards the rear and on the other hand a second screen 19 extending from the rear wall of said hearth obliquely downwardly so that its free edge 19a lies above the opposed edge 5c of the first screen 5b. The opening of the hearth is closed by a guillotine-type door made by a glass panel 23 sliding in lateral slides 21, 22 invisible from the outside. The hearth further includes an intermediate chamber 10 enclosed by an outer envelop and constituting a heat exchanger.
Inventors
- 👤 Artine Moughamian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:49
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/191; F24B1/192; F24B1/185; F24B1/188; F24B1/1885
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
258 words
An improved fireplace hearth for burning fuel on a grid and delivering smoke upwardly through a flue, the hearth having a base wall and a back wall and side walls and having a top wall which communicates with said flue, and the hearth having an open front wall and having door means selectively moveable between an open position and a closed position in which the door means closes the open front of the hearth, the improvements comprising: (a) a first deflection screen in the hearth which extends thereacross between the side walls, the first screen being located above the grid and spaced below the top wall and extending obliquely downwardly from the open front wall and terminating at a first terminal edge located near the center of the hearth; (b) a second deflection screen in the hearth which extends thereacross between the side walls, the second screen being located above the first screen and being spaced below the top wall and extending obliquely downwardly from the back wall and terminating at a second terminal edge located above the first terminal edge and in spaced relationship with respect thereto; and (c) the first and second screens defining an enlarged hood located above the grate and below the top wall and extending from the front to the rear wall between the side walls which hood is enclosed except for a smoke passage defined by said vertically spaced terminal edges and by the flue, the height of the hood being large as compared with the vertical spacing of said terminal edges.
Claim 2
Dependent Claim
258 words
An improved fireplace hearth for burning fuel on a grid and delivering smoke upwardly through a flue, the hearth having a base wall and a back wall and side walls and having a top wall which communicates with said flue, and the hearth having an open front wall and having door means selectively moveable between an open position and a closed position in which the door means closes the open front of the hearth, the improvements comprising: (a) a first deflection screen in the hearth which extends thereacross between the side walls, the first screen being located above the grid and spaced below the top wall and extending obliquely downwardly from the open front wall and terminating at a first terminal edge located near the center of the hearth; (b) a second deflection screen in the hearth which extends thereacross between the side walls, the second screen being located above the first screen and being spaced below the top wall and extending obliquely downwardly from the back wall and terminating at a second terminal edge located above the first terminal edge and in spaced relationship with respect thereto; and (c) the first and second screens defining an enlarged hood located above the grate and below the top wall and extending from the front to the rear wall between the side walls which hood is enclosed except for a smoke passage defined by said vertically spaced terminal edges and by the flue, the height of the hood being large as compared with the vertical spacing of said terminal edges.
Claim 3
Dependent Claim
111 words
The improved hearth as claimed in claim 1, wherein the hearth further includes a surrounding envelop having bottom and side and rear partitions, the envelop having an open front registering with said open front wall, and the partitions defining with said walls an intermediate warm air chamber coupled with warm air duct means at the top of the chamber, the side walls of the hearth being canted inwardly at their upper ends to provide space to receive warm air duct mounting flanges extending into the warm air chamber, and the bottom partition having a central opening therethrough for admitting air into the intermediate space to impinge directly against the base wall.
Claim 4
Dependent Claim
67 words
The improved hearth as claimed in claim 2, wherein the base wall and the bottom partition end short of meeting the front wall of the hearth and are joined together and leave a free space between them and the front wall, and the hearth further includes in said free space an ash pan recessed to the level of the base wall and including an air control damper.
Claim 5
Dependent Claim
66 words
The improved hearth as claimed in claim 1, wherein said base wall is elevated above ground level, and wherein said door means comprises a glass panel which is guided in vertical slides located at the front wall of the hearth, the glass panel being moveable both above and below alignment with the open front of the hearth to permit access behind the panel for cleaning it.
References Cited (Backward Citations)
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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) | 1989-03-10 | 1989-09-09 | 1990-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-10 | 1993-09-09 | 1994-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-10 | 1997-09-09 | 1998-03-11 | $7700.00 | Window Closed / Lapsed |