Patent US3771944A successfully refreshed from Google Patents.
US3771944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable flame burner
Assignee: Bloom Engineering Co Inc
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Filing: 1972-08-30
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Granted: 1973-11-13
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Expires: 1992-08-30
Abstract
Abstract An adjustable flame burner for an industrial furnace includes a burner body having an apertured refractory baffle forming a forward wall thereof. A fuel duct extends concentrically within the burner body and in registry with a fuel opening in the baffle. An annular chamber is formed between the fuel duct and the burner body and a close-off means is positioned internal of the air chamber to close off certain of the apertures so as to permit adjustment of the flame at all levels of operation. The close-off means can be either movable plugs secured within the air chamber or a partitioned air chamber having a separate air inlet feeding each resultant chamber ahd having alloy tubes connecting from one of the resultant chambers to certain of the apertures. Dual, concentric fuel ducts can be employed with the various close-off means.
Inventors
- 👤 J Hovis
- 👤 H Finke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:01
CPC Classifications
F; F23; F23D; F23D14/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
141 words
An adjustable flame burner for an industrial furnace comprising a burner body having a refractory baffle forming a forward wall thereof and including a plurality of spaced combustion sustaining gas apertures extending therethrough and positioned in a circular plane radially outward from the baffle central axis and a fuel opening therethrough along the central axis, a backwall, a fuel duct adapted to connect with a fuel source and extending concentrically within the burner body in registry with the fuel opening, an annular chamber means formed between the fuel duct and the burner body including the forward wall thereof, a combustion sustaining gas inlet means cooperating with the annular chamber means, close-off means positioned internal of the air chamber means to close off certain of the apertures so as to permit adjustment of the flame by means unexposed to the furnace interior.
Claim 2
Dependent Claim
141 words
An adjustable flame burner for an industrial furnace comprising a burner body having a refractory baffle forming a forward wall thereof and including a plurality of spaced combustion sustaining gas apertures extending therethrough and positioned in a circular plane radially outward from the baffle central axis and a fuel opening therethrough along the central axis, a backwall, a fuel duct adapted to connect with a fuel source and extending concentrically within the burner body in registry with the fuel opening, an annular chamber means formed between the fuel duct and the burner body including the forward wall thereof, a combustion sustaining gas inlet means cooperating with the annular chamber means, close-off means positioned internal of the air chamber means to close off certain of the apertures so as to permit adjustment of the flame by means unexposed to the furnace interior.
Claim 3
Dependent Claim
36 words
The burner of claim 1 in which said close-off means includes at least one plug secured to the burner and positioned within the annular chamber means and movable to open and close certain of said apertures.
Claim 4
Dependent Claim
69 words
The burner of claim 1 in which said close-off means includes a partitioned wall partitioning said annular chamber means into a first and second chamber, certain of said apertures communicating with the first chamber and the remainder of said apertures in communication with the second chamber, said inlet means including a first inlet cooperating with the first air chamber and a second inlet cooperating with the second air chamber.
Claim 5
Dependent Claim
16 words
The burner of claim 1 including concentric fuel ducts adapted for connection to independent fuel sources.
Claim 6
Dependent Claim
36 words
The burner of claim 2 wherein each plug includes a shaft portion slidably positioned within a spider secured to the fuel duct, said shaft extending parallel to the burner body longitudinal axis and through the backwall.
Claim 7
Dependent Claim
29 words
The burner of claim 3 wherein tubular elements extend from the partitioned wall to certain of said apertures to communicate the second chamber with said remainder of said apertures.
Claim 8
Dependent Claim
19 words
The burner of claim 3 wherein said first inlet is substantially larger in cross section than said second inlet.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |