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US4167177A Expired / Lapsed US ⏱️ 0.0 years remaining

Fireplaces

Assignee: QUADCO ALASKA Inc
•
Filing: 1976-09-07
•
Granted: 1979-09-11
•
Expires: 1996-09-07
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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. Wigins

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 11:07
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/181

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 154 words
A fireplace comprising a fire-pan, a generally conical fire enclosure extending upwardly from the fire-pan to a flue and having a side opening, a generally frusto-conical casing concentrically surrounding the fire enclosure and having a side opening in register with the opening in the fire enclosure, and a fire door assembly rotatably supported concentricallly intermediate between the enclosure and the casing, said assembly comprising a frame having portions projecting above and outwardly of the top of the frusto-conical casing, a mesh screen and a fire door plate each supported by said frame and each bounding sufficient of the periphery of the conical enclosure to be rotatable into a position obturating the opening therein, a sufficient portion of the periphery of the enclosure being unbounded by either the screen or the door plate to permit the frame to be rotated so that at least a substantial portion of the opening in the enclosure is unobturated.
Claim 2
Dependent Claim 154 words
A fireplace comprising a fire-pan, a generally conical fire enclosure extending upwardly from the fire-pan to a flue and having a side opening, a generally frusto-conical casing concentrically surrounding the fire enclosure and having a side opening in register with the opening in the fire enclosure, and a fire door assembly rotatably supported concentricallly intermediate between the enclosure and the casing, said assembly comprising a frame having portions projecting above and outwardly of the top of the frusto-conical casing, a mesh screen and a fire door plate each supported by said frame and each bounding sufficient of the periphery of the conical enclosure to be rotatable into a position obturating the opening therein, a sufficient portion of the periphery of the enclosure being unbounded by either the screen or the door plate to permit the frame to be rotated so that at least a substantial portion of the opening in the enclosure is unobturated.
Claim 3
Dependent Claim 22 words
A fireplace according to claim 1 in which the projecting portions of the frame include an annular handle concentric with the flue.
Claim 4
Dependent Claim 49 words
A fireplace according to claim 1 in which the screen is of expanded metal mesh, with the mesh openings oriented so as to provide maximum visibility of the fire through the screen from above and in front of the fireplace when the screen obturates the opening in the enclosure.
Claim 5
Dependent Claim 36 words
A fireplace according to claim 1 in which the weight of the fire door assembly is distributed relative to its points of support on the enclosure so as to bias the door plate towards the enclosure.

References Cited (Backward Citations)

US167497A Cited
US182287A Cited
DE499037C Cited
GB409342A Cited
US2231258A Cited
GB667570A Cited
US3220400A Cited
US3327698A Cited
US3515122A Cited
US3910251A Cited
US3768457A Cited
US3809058A Cited
US3880139A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-09-10 1983-03-12 1983-09-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-09-10 1987-03-12 1987-09-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-09-10 1991-03-12 1991-09-11 $7700.00 Window Closed / Lapsed

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