US3685506A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fireplace hood heat saver
Assignee: Individual
•
Filing: 1970-11-05
•
Granted: 1972-08-22
•
Expires: 1990-11-05
Abstract
Abstract A fireplace hood comprising an inner shell having a bottom opening to receive the gaseous products of combustion, a top opening to pass the combustion products out to the atmosphere, a chimney section attached to the upper portion of the shell and having located therein a plurality of horizontal tubes passing through the chimney section, sealed to the combustion products, but open at the ends to the atmosphere, a fan disposed adjacent to the open-ended tubes to circulate air through the tubes and an exterior shell surrounding the inner shell whereby the exterior surface is maintained at a temperature safe to touch. The exterior shell includes air passages corresponding to the tubes whereby the air heated in the tubes in the chimney as well as the air heated between the shells is exhausted into the room.
Inventors
- 👤 Margaret A Mouat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 04:55
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885; F24B1/1886
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
172 words
A fireplace hood comprising; an open bottomed inner enclosure converging as it extends upwardly substantially overlying the fire location, said hood being imperforate with the exception of an exhaust port in the upper portion of the enclosure; an outer open bottomed enclosure surrounding the first enclosure being secured thereto, about the periphery of their bottom edges spaced therefrom except at the joint and terminating substantially above the inner enclosure, said enclosure having a first opening for passage of the air between the enclosures out into the surrounding room, and a second opening for introducing fresh air between the enclosures, and a section of straight hollow pipe extending from the exhaust port of the inner enclosure to the exhaust port of the outer enclosure, for transmittal of the hot exhaust gases to the atmosphere whereby continual movement of the heated air keeps the exterior surface of the outer enclosure at a relatively cool temperature and the heat absorbed by the air between the enclosures is exhausted into the area immediately surrounding the fireplace.
Claim 2
Dependent Claim
172 words
A fireplace hood comprising; an open bottomed inner enclosure converging as it extends upwardly substantially overlying the fire location, said hood being imperforate with the exception of an exhaust port in the upper portion of the enclosure; an outer open bottomed enclosure surrounding the first enclosure being secured thereto, about the periphery of their bottom edges spaced therefrom except at the joint and terminating substantially above the inner enclosure, said enclosure having a first opening for passage of the air between the enclosures out into the surrounding room, and a second opening for introducing fresh air between the enclosures, and a section of straight hollow pipe extending from the exhaust port of the inner enclosure to the exhaust port of the outer enclosure, for transmittal of the hot exhaust gases to the atmosphere whereby continual movement of the heated air keeps the exterior surface of the outer enclosure at a relatively cool temperature and the heat absorbed by the air between the enclosures is exhausted into the area immediately surrounding the fireplace.
Claim 3
Dependent Claim
56 words
A hood as in claim 1 wherein the hollow pipe extending between the respective exhaust Ports of the two sections has a plurality of straight parallel hollow imperforate open-ended tubes extending horizontally therethrough whereby the heat normally passing up the exhaust stack will be absorbed by air within the tubes and transmitted into the surrounding area.
Claim 4
Dependent Claim
19 words
A hood as in claim 1 and further including a thermostatically controlled blower for forcing air through the tubes.
Claim 5
Dependent Claim
168 words
A free standing fireplace having a base for supporting the fire; a first enclosure, open on one side overlying and sealed to the base, said enclosure having an exhaust port in the upper portion thereof, a second enclosure having an opening on one side coinciding with the opening in the first enclosure, said second enclosure substantially surrounding the first enclosure and spaced therefrom except immediately adjacent the opening, having an exhaust port in the upper portion thereof substantially vertically aligned with the exhaust port of the first enclosure, a second opening in the second enclosure allowing escape of the heat air generated between the two enclosures, and an exhaust pipe extending between the exhaust port of the first enclosure and the exhaust port of the second enclosure for passage of gasses therethrough said hollow pipe having a plurality of straight hollow imperforate open-ended substantially horizontal parallel tubes extending therethrough whereby the heat normally passing up the exhaust stack will be capitalized upon and transmitted into the surrounding area.
Claim 6
Dependent Claim
168 words
A free standing fireplace having a base for supporting the fire; a first enclosure, open on one side overlying and sealed to the base, said enclosure having an exhaust port in the upper portion thereof, a second enclosure having an opening on one side coinciding with the opening in the first enclosure, said second enclosure substantially surrounding the first enclosure and spaced therefrom except immediately adjacent the opening, having an exhaust port in the upper portion thereof substantially vertically aligned with the exhaust port of the first enclosure, a second opening in the second enclosure allowing escape of the heat air generated between the two enclosures, and an exhaust pipe extending between the exhaust port of the first enclosure and the exhaust port of the second enclosure for passage of gasses therethrough said hollow pipe having a plurality of straight hollow imperforate open-ended substantially horizontal parallel tubes extending therethrough whereby the heat normally passing up the exhaust stack will be capitalized upon and transmitted into the surrounding area.
Claim 7
Dependent Claim
19 words
A fireplace as in claim 4 and further including a thermostatically controlled blower for forcing air through the tubes.
References Cited (Backward Citations)
US1589539A
Cited
US2235428A
Cited
US2622587A
Cited
US2671440A
Cited
US2747568A
Cited
US2789554A
Cited
US3190279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |