US4216760A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireplaces
Assignee: Individual
•
Filing: 1978-06-12
•
Granted: 1980-08-12
•
Expires: 1998-06-12
Abstract
Abstract A fireplace has an imperforate dished fire-pan, the sloping sides of which support the fire, which radiates through an opening in the wall of a conical enclosure superposed on the fire-pan. An outer frustoconical casing in most cases surrounds the enclosure, with an opening in register with the opening in the disclosure, and defines an air circulation space through which air circulates upwardly from beneath the fire-pan up into the room. A duct from the exterior of the room to be heated may extend into the space beneath the fire-pan, which space may also contain a water pan to humidify the circulating air. A fire control member is rotatable between the enclosure and the casing so as optionally to obturate the openings therein with either a mesh fire screen or a plate closing off the openings. The fireplace aims to provide complete and controllable combustion of wood fuel, and efficient space heating and, optionally, ventilation of a room in which it is situated.
Inventors
- 👤 William H. Wiggins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:43
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/181
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
238 words
A fireplace comprising a plurality of components arranged coaxially one above another, including a stand, an imperforate dished fire-pan forming a grateless fire box to receive a fire and supported by the stand, the stand being configured to permit unobstructed convection of air over the whole of the lower surface of the fire-pan, a fire enclosure standing on the fire-pan, the fire enclosure comprising a cone tapering from a base, of substantially the same dimensions of the fire-pan and extending around the full periphery of the cone, to a flue opening at its upper end, the cone defining an opening above and to one side of the upper surface of the fire-pan, a generally frusto-conical casing covering the cone and defining an air circulation space surrounding the cone, the casing having an opening in register with that in the cone, and a screen member provided between the cone and the casing to close the openings defined in said cone and said casing, wherein the casing terminates in a top flange of greater diameter than the flue opening of the cone, so as to define an air gap between the flange and the flue opening, and the lower end of the casing is configured to provide an air entry to the air space between the casing and the cone, and wherein the components of the fireplace are stackable coaxially one within another in an alternative overlapping relationship for transit.
Claim 2
Dependent Claim
238 words
A fireplace comprising a plurality of components arranged coaxially one above another, including a stand, an imperforate dished fire-pan forming a grateless fire box to receive a fire and supported by the stand, the stand being configured to permit unobstructed convection of air over the whole of the lower surface of the fire-pan, a fire enclosure standing on the fire-pan, the fire enclosure comprising a cone tapering from a base, of substantially the same dimensions of the fire-pan and extending around the full periphery of the cone, to a flue opening at its upper end, the cone defining an opening above and to one side of the upper surface of the fire-pan, a generally frusto-conical casing covering the cone and defining an air circulation space surrounding the cone, the casing having an opening in register with that in the cone, and a screen member provided between the cone and the casing to close the openings defined in said cone and said casing, wherein the casing terminates in a top flange of greater diameter than the flue opening of the cone, so as to define an air gap between the flange and the flue opening, and the lower end of the casing is configured to provide an air entry to the air space between the casing and the cone, and wherein the components of the fireplace are stackable coaxially one within another in an alternative overlapping relationship for transit.
Claim 3
Dependent Claim
91 words
A fireplace according to claim 1, wherein the flue extends out of the room in which the fireplace is installed, and a fresh air vent extends into the bottom opening of the outer casing from outside the room, whereby air from both outside the room and from beneath the fire-pan inside the room may convect through the circulation space and into the room at a higher level, and air from an intermediate level in the room may exhaust through opening in the casing, the opening in the cone, and the flue.
Claim 4
Dependent Claim
23 words
A fireplace according to claim 2, wherein the fresh air vent is provided with a flap valve controlling the flow of air therethrough.
Claim 5
Dependent Claim
33 words
A fireplace according to claim 2, further comprising a water trough within the outer casing beneath the fire-pan, whereby water from the trough is evaporated into the air convecting through the circulation space.
Claim 6
Dependent Claim
18 words
A fireplace according to claim 4, wherein the water trough is annular, and surrounds the fresh air vent.
Claim 7
Dependent Claim
22 words
A fireplace according to claim 5, wherein the water trough forms a base upon which the remainder of the fireplace is supported.
Claim 8
Dependent Claim
58 words
A fireplace according to claim 1, wherein the opening in the fire cone is formed by cutting away a portion of one side of the cone just above but not intersecting its lower edge, the cut away portion of the cone being secured as a heat shield to the inner surface of the opposite side of the cone.
Claim 9
Dependent Claim
16 words
A fireplace according to claim 1, wherein the cone and the casing are both flow turned.
References Cited (Backward Citations)
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Cited
US3220400A
Cited
US3515122A
Cited
US3724443A
Cited
US3952721A
Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-08-12 | 1984-02-11 | 1984-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-08-12 | 1988-02-11 | 1988-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-08-12 | 1992-02-11 | 1992-08-12 | $7700.00 | Window Closed / Lapsed |