US3817685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combustion heads for burners
Assignee: FINTERM SpA
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Filing: 1972-02-16
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Granted: 1974-06-18
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Expires: 1992-02-16
Abstract
Abstract This invention provides a combustion head for burners of the kind in which primary air is supplied to a combustion zone through a supply pipe which coaxially surrounds a fuel supply pipe, the latter terminating in a spray nozzle surrounded by a cup. An ejector device of the annular or deflected jet type is associated with the primary air supply pipe and is energised by the primary air to cause a low pressure externally of the cup so as to draw into the head a portion of the burnt gases from the burner so that these burnt gases are recirculated in a zone adjacent the reaction zone to dilute the reagents and promote complete combustion.
Inventors
- 👤 G Joannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:55
CPC Classifications
F; F23; F23C; F23C9/00; F23C9/006; F23D; F23D11/00; F23D11/36; F23D11/40; F23D11/402; F23C2202/00; F23C2202/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
A burner comprising a primary air supply pipe, a fuel supply pipe extending coaxially within said air supply pipe, a spray nozzle secured to the end of said fuel supply pipe, a cup secured to and surrounding said spray nozzle, said cup having a plurality of apertures in the bottom thereof for the regulated flow of air from said air supply pipe to said spray nozzle, said air supply pipe terminating in spaced-apart adjacent relation to said cup to provide an annular passage for the regulated flow of air over the outer surface of said cup, and an ejector ring device spaced from the external surface of said air supply pipe and said cup, said ejector ring means defining with said air supply pipe an annular aperture through which recirculating burnt gases are drawn by the passage of primary air through said annular passage between said air supply pipe and said cup.
Claim 2
Dependent Claim
152 words
A burner comprising a primary air supply pipe, a fuel supply pipe extending coaxially within said air supply pipe, a spray nozzle secured to the end of said fuel supply pipe, a cup secured to and surrounding said spray nozzle, said cup having a plurality of apertures in the bottom thereof for the regulated flow of air from said air supply pipe to said spray nozzle, said air supply pipe terminating in spaced-apart adjacent relation to said cup to provide an annular passage for the regulated flow of air over the outer surface of said cup, and an ejector ring device spaced from the external surface of said air supply pipe and said cup, said ejector ring means defining with said air supply pipe an annular aperture through which recirculating burnt gases are drawn by the passage of primary air through said annular passage between said air supply pipe and said cup.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-17 | 1977-12-17 | 1978-06-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-17 | 1981-12-17 | 1982-06-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-17 | 1985-12-17 | 1986-06-18 | $7700.00 | Window Closed / Lapsed |