US3944142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split stream burner assembly
Assignee: Foster Wheeler Energy Corp
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Filing: 1974-03-22
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Granted: 1976-03-16
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Expires: 1994-03-22
Abstract
Abstract A burner assembly in which pulverized solid fuel passing through the burner housing is divided into a plurality of streams, which, upon combustion, produce a plurality of flame patterns to reduce the formation of nitric oxides.
Inventors
- 👤 Robert P. Welden
- 👤 Lawrence V. O'Connor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:10
CPC Classifications
F; F23; F23D; F23D1/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
120 words
A burner assembly comprising a housing adapted to receive a fuel, a rod extending within said housing for defining an annular flow path for said fuel through said housing, said flow path terminating in an annular discharge opening, and a plurality of posts extending between said housing and said rod and spaced around said annular discharge opening for splitting up the fuel discharging from said opening so that, upon ignition of said fuel, a plurality of flame patterns are formed, each of said posts having a triangular cross-section with a base of said triangle extending substantially flush with the discharge end of said housing and with an angle of said triangle extending in said flow path upstream from said base.
Claim 2
Dependent Claim
120 words
A burner assembly comprising a housing adapted to receive a fuel, a rod extending within said housing for defining an annular flow path for said fuel through said housing, said flow path terminating in an annular discharge opening, and a plurality of posts extending between said housing and said rod and spaced around said annular discharge opening for splitting up the fuel discharging from said opening so that, upon ignition of said fuel, a plurality of flame patterns are formed, each of said posts having a triangular cross-section with a base of said triangle extending substantially flush with the discharge end of said housing and with an angle of said triangle extending in said flow path upstream from said base.
Claim 3
Dependent Claim
29 words
The assembly of claim 1 wherein said posts define a plurality of arcuate discharge openings, the arcuate lengths of which are greater than the arcuate lengths of said posts.
Claim 4
Dependent Claim
30 words
The assembly of claim 1 wherein said housing is tapered in a manner so that the cross-sectional area of said flow path decreases in a direction towards said discharge opening.
References Cited (Backward Citations)
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Cited
US745872A
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US1885067A
Cited
US2301017A
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US2391934A
Cited
US3556410A
Cited
US3640472A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |