Patent US3722866A successfully refreshed from Google Patents.
US3722866A
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US
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Apparatus for feeding a gas furnace
Assignee: Societe Europeenne des Produits Refractaires SAS
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Filing: 1971-04-05
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Granted: 1973-03-27
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Expires: 1991-04-05
Abstract
Abstract A method and apparatus for providing substantially uniform temperature in a furnace or kiln heated by combustion of an airfuel mixture. A distribution chamber is provided having at least one permeable wall adjacent the combustion chamber. The permeable wall comprises a refractory material, either fabric or felt, of ceramic fibers. The air-fuel mixture is introduced into the distribution chamber at a pressure in excess of that in the combustion chamber. In this way the air-fuel mixture slowly passes through the permeable wall and is ignited and burned over a large area within the combustion chamber.
Inventors
- 👤 C Herzberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:29
CPC Classifications
F; F27; F27D; F27D99/00; F27D99/0001; F23; F23D; F23D14/00; F23D14/12; F23D14/16; F27B; F27B11/00; F23D2212/00; F23D2212/10; F23D2212/103; F27D1/00; F27D1/0003; F27D1/0006; F27D1/0009; F27D1/18; F27D1/1808; F27D2001/0059; F27D2001/0069; F27D2001/0073; F27D99/0033
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
84 words
A furnace comprising an arched roof comprising an airtight lightweight hood and an inner refractory wall made of a fabric with a base of ceramic fibers, the side wall being permeable to combustible gases, said inner and outer walls defining a distribution chamber along at least one portion of the furnace interior which defines the combustion chamber, means for introducing the combustible gases into the distribution chamber at a pressure greater than that of the furnace interior and means for exhausting the combustion products.
Claim 2
Dependent Claim
84 words
A furnace comprising an arched roof comprising an airtight lightweight hood and an inner refractory wall made of a fabric with a base of ceramic fibers, the side wall being permeable to combustible gases, said inner and outer walls defining a distribution chamber along at least one portion of the furnace interior which defines the combustion chamber, means for introducing the combustible gases into the distribution chamber at a pressure greater than that of the furnace interior and means for exhausting the combustion products.
Claim 3
Dependent Claim
22 words
A furnace according to claim 1 wherein at least one part of the outer wall is heat-insulated sheets of ceramic fiber felt.
Claim 4
Dependent Claim
61 words
A furnace according to claim 2 having an arched roof comprising an airtight lightweight hood of a ceramic fiber base and a floor comprising a refractory permeable inner wall extending over at least a portion of the floor defining a distribution chamber, means for feeding the combustible gases under pressure to the distribution chamber and means for exhausting the combustion products.
Claim 5
Dependent Claim
35 words
A furnace according to claim 1 wherein the combustible gases are delivered to the distribution chamber by permeable flues made of fabric with a base of ceramic fibers, said flues extending into the distribution chamber.
Claim 6
Dependent Claim
27 words
A furnace according to claim 1 comprising a hearth and wherein the means for exhausting the combustion products comprise a space between the hood and the hearth.
Claim 7
Dependent Claim
18 words
A furnace aCcording to claim 5 comprising means for adjusting the height of the hood above the hearth.
Claim 8
Dependent Claim
112 words
A furnace comprising: an arched roof being an outer airtight lightweight hood comprising at least in part heat insulating material of a ceramic fiber base and an inner permeable refractory roof wall of a fabric having a ceramic fiber base, said inner and outer roof walls defining a distribution chamber along at least a portion of the furnace interior which defines the combustion chamber; a floor comprising a refractory permeable inner wall extending over at least a portion of the floor defining a second distribution chamber; means for introducing combustible gases into said distribution chambers at a pressure greater than that of the furnace interior; and, means for exhausting the combustion products.
Claim 9
Dependent Claim
112 words
A furnace comprising: an arched roof being an outer airtight lightweight hood comprising at least in part heat insulating material of a ceramic fiber base and an inner permeable refractory roof wall of a fabric having a ceramic fiber base, said inner and outer roof walls defining a distribution chamber along at least a portion of the furnace interior which defines the combustion chamber; a floor comprising a refractory permeable inner wall extending over at least a portion of the floor defining a second distribution chamber; means for introducing combustible gases into said distribution chambers at a pressure greater than that of the furnace interior; and, means for exhausting the combustion products.
Claim 10
Dependent Claim
27 words
A furnace according to claim 7 wherein the exhausting means comprises an opening supported by adjustable spacers between the floor and the base of the lightweight roof.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-03-26 | 1976-09-25 | 1977-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-26 | 1980-09-25 | 1981-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-26 | 1984-09-25 | 1985-03-27 | $7700.00 | Window Closed / Lapsed |