US3874364A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Open fireplace for living quarters or the like
Assignee: Superpart AG
•
Filing: 1973-11-19
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Granted: 1975-04-01
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Expires: 1993-11-19
Abstract
Abstract An open fireplace for living quarters embodying a firebox, rear wall and flue or chimney as well as an air guiding system accommodated in the walls for entrapping or catching fresh air at a catch location arranged externally of the room and for heating this fresh air in at least one downdraft channel exposed to the thermal action of the firebox, the air infeed location of which is disposed at a higher location than its air outfeed location. At the air outfeed location of the at least one downdraft channel there is provided at least one updraft channel having an air outfeed location which opens into the room or the like.
Inventors
- 👤 Hans Fauser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:55
CPC Classifications
F; F24; F24B; F24B1/00; F24B1/18; F24B1/185; F24B1/188; F24B1/1885
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
138 words
An open fireplace for living areas or rooms or the like, comprising a firebox, side walls, rear wall and flue including an air guide system accommodated in the walls thereof for collecting and heating fresh air, the air guide system including a fresh air catch arranged externally of the room, a downdraft channel which communicates with the air catch and which is subjected to the thermal action of the firebox, the downdraft channel having an air infeed which is situated higher than its air outfeed, an ascending channel for connecting the fresh air catch with the air infeed of the downdraft channel and an updraft channel which is subjected to the thermal action of the firebox, said updraft channel having an air inlet communicating with the downdraft channel air outfeed and an air outlet communicating with the room.
Claim 2
Dependent Claim
138 words
An open fireplace for living areas or rooms or the like, comprising a firebox, side walls, rear wall and flue including an air guide system accommodated in the walls thereof for collecting and heating fresh air, the air guide system including a fresh air catch arranged externally of the room, a downdraft channel which communicates with the air catch and which is subjected to the thermal action of the firebox, the downdraft channel having an air infeed which is situated higher than its air outfeed, an ascending channel for connecting the fresh air catch with the air infeed of the downdraft channel and an updraft channel which is subjected to the thermal action of the firebox, said updraft channel having an air inlet communicating with the downdraft channel air outfeed and an air outlet communicating with the room.
Claim 3
Dependent Claim
34 words
The open fireplace as defined in claim 1, wherein the downdraft channel is at least primarily arranged at the rear wall and a respective updraft channel connecting therewith is provided in each side wall.
Claim 4
Dependent Claim
55 words
The open fireplace as defined in claim 1 wherein said fresh air catch is positioned below the downdraft channel air infeed and said updraft channel room outlet is positioned above the downdraft channel air outfeed whereby fresh air is serially conducted upwardly, downwardly and then upwardly through the air guide system before entering the room.
Claim 5
Dependent Claim
139 words
An open fireplace for living areas or rooms or the like, comprising a firebox, side walls, rear wall and flue including an air guide system accommodated in the walls thereof for collecting and heating fresh air, the air guide system including a fresh air catch arranged externally of the room, a downdraft channel which communicates with the air catch and which is subjected to the thermal action of the firebox, the downdraft channel having an air infeed which is situated higher than its air outfeed, an ascending channel for connecting the fresh air catch with the air infeed of the downdraft channel, and an updraft channel having an air inlet which communicates with the downdraft channel air outfeed, said updraft channel being further provided with an air inlet and an air outlet each of which communicates with the room.
Claim 6
Dependent Claim
139 words
An open fireplace for living areas or rooms or the like, comprising a firebox, side walls, rear wall and flue including an air guide system accommodated in the walls thereof for collecting and heating fresh air, the air guide system including a fresh air catch arranged externally of the room, a downdraft channel which communicates with the air catch and which is subjected to the thermal action of the firebox, the downdraft channel having an air infeed which is situated higher than its air outfeed, an ascending channel for connecting the fresh air catch with the air infeed of the downdraft channel, and an updraft channel having an air inlet which communicates with the downdraft channel air outfeed, said updraft channel being further provided with an air inlet and an air outlet each of which communicates with the room.
Claim 7
Dependent Claim
31 words
ThE open fireplace as defined in claim 4, further including control means in order to determine the quantity of air arriving through the different air inlet locations in the updraft channel.
Claim 8
Dependent Claim
18 words
The open fireplace as defined in claim 5, wherein said control means comprises at least one flap member.
References Cited (Backward Citations)
US1251916A
Cited
US1697635A
Cited
US2970590A
Cited
US3180332A
Cited
US3190282A
Cited
US3762391A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |