US3904349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel burner
Assignee: Babcock and Wilcox Co
•
Filing: 1974-05-22
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Granted: 1975-09-09
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Expires: 1994-05-22
Abstract
Abstract An improved fluent fuel burning apparatus including three individual airflow passages and separate means for apportioning the flow of combustion air among the passages so as to achieve complete combustion of the fuel while reducing the formation of nitric oxides.
Inventors
- 👤 Morris W Peterson
- 👤 Brett C Krippene
- 👤 David M Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:56
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/002; F23C; F23C7/00; F23C7/002; F23C7/004; F23C7/008
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
148 words
In combination with a boundary wall of a furnace, at least one burner port formed in the boundary wall, a burner wall spaced from the boundary wall to form a windbox therebetween to which combustion air is supplied, an open ended member disposed within the windbox and forming a central passageway of circular crosssection coaxially arranged with and having its discharge end opening to said port, conduit means concentrically spaced about said open ended member to form therebetween a first annular passageway discharging into said port, adjustable vane means disposed within said first passageway, a register concentrically spaced about said conduit means to define therewith a second annular passageway discharging into said port, means disposed within said windbox for apportioning the combustion air between said passageways, and nozzle means for introducing a fluent fuel into the port in a pattern substantially symmetrical with the axis of said port.
Claim 2
Dependent Claim
148 words
In combination with a boundary wall of a furnace, at least one burner port formed in the boundary wall, a burner wall spaced from the boundary wall to form a windbox therebetween to which combustion air is supplied, an open ended member disposed within the windbox and forming a central passageway of circular crosssection coaxially arranged with and having its discharge end opening to said port, conduit means concentrically spaced about said open ended member to form therebetween a first annular passageway discharging into said port, adjustable vane means disposed within said first passageway, a register concentrically spaced about said conduit means to define therewith a second annular passageway discharging into said port, means disposed within said windbox for apportioning the combustion air between said passageways, and nozzle means for introducing a fluent fuel into the port in a pattern substantially symmetrical with the axis of said port.
Claim 3
Dependent Claim
33 words
The combination according to claim 1 wherein the means for apportioning the combustion air include having the conduit means formed with a slotted portion and providing sleeve means movable across said slotted portions.
Claim 4
Dependent Claim
16 words
The combination according to claim 2 wherein said sleeve means is disposed within the conduit means.
Claim 5
Dependent Claim
15 words
The combination according to claim 2 including rotatable means fitted in said sleeve means wall.
Claim 6
Dependent Claim
48 words
The combination according to claim 1 wherein the means for apportioning the combustion air include a member coaxially arranged with and facing the inlet end of the central passageway, said last named member being movable along its axis to vary the distance between it and said inlet end.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |