Patent US3705690A successfully refreshed from Google Patents.
US3705690A
Expired / Lapsed
US
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Combustion heads
Assignee: Individual
•
Filing: 1972-04-17
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Granted: 1972-12-12
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Expires: 1992-04-17
Abstract
Abstract A combustion head which surrounds the fuel nozzle in an oil burner, the combustion head directing a stream of air into a cone which converges at the fuel nozzle; the inside of the combustion head is contoured to achieve maximum air velocity at the plane of fuel injection.
Inventors
- 👤 Joseph W Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:44
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23D11/40
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
107 words
A combustion system, comprising : an air stream, a blast tube surrounding said air stream, a fuel nozzle within said air stream, and a combustion head surrounding said fuel nozzle, said combustion head comprising a generally barrel-shaped member having an open downstream end, a closed upstream end perpendicular to the longitudinal axis of said combusiton head and having air admission holes therethrough, a first diverging sidewall adjacent said closed end and coaxial with said axis, and a second sidewall adjacent said first sidewall and substantially parallel with said axis, said first side wall having air admission holes at an angle other than 90 degrees with said sidewall.
Claim 2
Dependent Claim
107 words
A combustion system, comprising : an air stream, a blast tube surrounding said air stream, a fuel nozzle within said air stream, and a combustion head surrounding said fuel nozzle, said combustion head comprising a generally barrel-shaped member having an open downstream end, a closed upstream end perpendicular to the longitudinal axis of said combusiton head and having air admission holes therethrough, a first diverging sidewall adjacent said closed end and coaxial with said axis, and a second sidewall adjacent said first sidewall and substantially parallel with said axis, said first side wall having air admission holes at an angle other than 90 degrees with said sidewall.
Claim 3
Dependent Claim
17 words
The combustion system of claim 1 wherein said air admission holes direct air onto said fuel nozzle.
Claim 4
Dependent Claim
18 words
The combustion system of claim 2 further including means to accelerate the air flow within said combustion head.
Claim 5
Dependent Claim
24 words
The combustion system of claim 3 wherein said accelerating means comprises a substantially venturi-shaped contOur incorporated into said second sidewall of said combustion head.
Claim 6
Dependent Claim
24 words
The combustion system of claim 3 wherein said accelerating means comprises a substantially conical contour incorporated into said second sidewall of said combustion head.
References Cited (Backward Citations)
US1172755A
Cited
US1423650A
Cited
US2334617A
Cited
US2485207A
Cited
US3232542A
Cited
US3365136A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |