US3868212A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiant burner and furnace for treating at high temperature
Assignee: Ressorts du Nord SA
•
Filing: 1973-10-16
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Granted: 1975-02-25
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Expires: 1993-10-16
Abstract
Abstract Burner heating by the effect of radiation comprising a body of refractory fibre felt through which extends a metal sleeve for supplying a combustible mixture. A furnace is disclosed which comprises a case of a material containing refractory fibres having a very low thermal conductivity, the case having an inner surface defining a treating chamber. At least one tube extends through the material of the case and is connected to a source of combustible mixture outside the case and forms inside the chamber at least one burner which heats the inner surface defining the chamber.
Inventors
- 👤 Bernard J Lemaire
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:00
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/12; F23D14/125; C; C21; C21D; C21D9/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
98 words
A burner for heating by the effect of radiation, comprising a body of felt of refractory fibres defining a wall, a metal sleeve which extends through the body and is in interference fit in the felt for receiving a combustible mixture, an outlet orifice defined by the sleeve inside the body, a diffuser in alignment with said outlet for guiding the ignited combustible mixture in the direction of the wall of the body, and an inner surface layer on the felt wall which is vitrified by first high temperature heating and constitutes a radiant non porous thin skin.
Claim 2
Dependent Claim
98 words
A burner for heating by the effect of radiation, comprising a body of felt of refractory fibres defining a wall, a metal sleeve which extends through the body and is in interference fit in the felt for receiving a combustible mixture, an outlet orifice defined by the sleeve inside the body, a diffuser in alignment with said outlet for guiding the ignited combustible mixture in the direction of the wall of the body, and an inner surface layer on the felt wall which is vitrified by first high temperature heating and constitutes a radiant non porous thin skin.
Claim 3
Dependent Claim
23 words
A burner as claimed in claim 1, comprising a flange on the sleeve for fixing the sleeve to the body of the burner.
Claim 4
Dependent Claim
50 words
A burner as claimed in claim 1, wherein the diffuser comprises a rod which is coaxial with the sleeve and is arranged to be in contact with the combustible mixture inside the sleeve and a head integral with an end of the rod, the head and rod being heat conductive.
Claim 5
Dependent Claim
18 words
A burner as claimed in claim 3, comprising heat exchanging radial fins between the rod and the sleeve.
Claim 6
Dependent Claim
17 words
A burner as claimed in claim 3, comprising helical fins mounted between the rod and the sleeve.
Claim 7
Dependent Claim
19 words
A burner as claimed in claim 1, comprising a helical pipe inside the sleeve for supplying the combustible mixture.
Claim 8
Dependent Claim
18 words
A burner as claimed in claim 1, wherein the sleeve defines orifices for supplying the combustible mixture tangentially.
References Cited (Backward Citations)
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Cited
US2992676A
Cited
US3248099A
Cited
US3529916A
Cited
US3366156A
Cited
US3424542A
Cited
US3722866A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |