US3979069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-atomizing fuel nozzle
Assignee: Individual
•
Filing: 1974-10-11
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Granted: 1976-09-07
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Expires: 1994-10-11
Abstract
Abstract A nozzle for atomizing fuel for use in gas turbines and the like especially suitable for atomizing fuels of high viscosity, said nozzle having a fuel swirl chamber with a trumpet or funnel-shaped orifice along which the fuel flows as a swirling conical sheet and being characterized in that said trumpet or funnel-shaped portion is perforated for admission of compressed air in swirling fashion to atomize the swirling conical sheet of fuel.
Inventors
- 👤 Luigi Garofalo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:16
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/10; F23D11/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
220 words
An air-atomizing fuel nozzle comprising a nozzle body assembly defining therewithin a fuel passage, and first and second air passages; a nozzle body means communicating with said fuel passage and having a vortex chamber to impart a whirling motion to the fuel flowing through said fuel passage, and having a discharge orifice with an outwardly flared trumpet portion through which the fuel is discharged in the form of a swirling conical sheet; sleeve means in said assembly isolating said first and second air passages from each other; said trumpet portion between its ends having a circumferential series of holes opening thereinto from said first air passage for discharge of high velocity air jets into said trumpet portion to atomize the swirling conical sheet of fuel as it flows around said trumpet portion; said second air passage surrounding said sleeve means and said trumpet portion to form an annular air discharge passage for mixing of air with the fuel-air mixture emerging from the large end of said trumpet portion; said sleeve means and body means defining therebetween a radially narrow annular air passage at the large end of said trumpet portion, said narrow annular air passage communicating with said first air passage for discharge of high velocity air to further atomize the fuel-air mixture as it emerges from said trumpet portion.
Claim 2
Dependent Claim
220 words
An air-atomizing fuel nozzle comprising a nozzle body assembly defining therewithin a fuel passage, and first and second air passages; a nozzle body means communicating with said fuel passage and having a vortex chamber to impart a whirling motion to the fuel flowing through said fuel passage, and having a discharge orifice with an outwardly flared trumpet portion through which the fuel is discharged in the form of a swirling conical sheet; sleeve means in said assembly isolating said first and second air passages from each other; said trumpet portion between its ends having a circumferential series of holes opening thereinto from said first air passage for discharge of high velocity air jets into said trumpet portion to atomize the swirling conical sheet of fuel as it flows around said trumpet portion; said second air passage surrounding said sleeve means and said trumpet portion to form an annular air discharge passage for mixing of air with the fuel-air mixture emerging from the large end of said trumpet portion; said sleeve means and body means defining therebetween a radially narrow annular air passage at the large end of said trumpet portion, said narrow annular air passage communicating with said first air passage for discharge of high velocity air to further atomize the fuel-air mixture as it emerges from said trumpet portion.
Claim 3
Dependent Claim
24 words
The nozzle of claim 1 wherein said second air passage has swirl means for producing swirling air discharge from said annular air discharge passage.
Claim 4
Dependent Claim
15 words
The nozzle of claim 1 wherein said narrow annular air passage has swirl means therein.
Claim 5
Dependent Claim
255 words
An air-atomizing fuel nozzle comprising a nozzle body assembly defining therewithin a fuel passage, and first and second air passages; a nozzle body means communicating with said fuel passage and having a vortex chamber to impart a whirling motion to the fuel flowing through said fuel passage, and having a discharge orifice with an outwardly flared trumpet portion through which the fuel is discharged in the form of a swirling conical sheet; sleeve means in said assembly isolating said first and second air passages from each other; said trumpet portion between its ends having a circumferential series of holes opening thereinto from said first air passage for discharge of high velocity air jets into said trumpet portion to atomize the swirling conical sheet of fuel as it flows around said trumpet portion; said second air passage surrounding said sleeve means and said trumpet portion to form an annular air discharge passage for mixing of air with the fuel-air mixture emerging from the large end of said trumpet portion; said holes being angularly disposed to provide air jets having a tangential velocity component in the same direction as the tangential velocity component of the swirling conical sheet of fuel; and said sleeve means and body means defining therebetween another annular air discharge orifice communicating with said first air passage for discharge of high velocity air to further atomize the fuel-air mixture immediately upon emergence from the large end of said trumpet portion and prior to mixing with air discharged from said first-mentioned annular air discharge passage.
Claim 6
Dependent Claim
255 words
An air-atomizing fuel nozzle comprising a nozzle body assembly defining therewithin a fuel passage, and first and second air passages; a nozzle body means communicating with said fuel passage and having a vortex chamber to impart a whirling motion to the fuel flowing through said fuel passage, and having a discharge orifice with an outwardly flared trumpet portion through which the fuel is discharged in the form of a swirling conical sheet; sleeve means in said assembly isolating said first and second air passages from each other; said trumpet portion between its ends having a circumferential series of holes opening thereinto from said first air passage for discharge of high velocity air jets into said trumpet portion to atomize the swirling conical sheet of fuel as it flows around said trumpet portion; said second air passage surrounding said sleeve means and said trumpet portion to form an annular air discharge passage for mixing of air with the fuel-air mixture emerging from the large end of said trumpet portion; said holes being angularly disposed to provide air jets having a tangential velocity component in the same direction as the tangential velocity component of the swirling conical sheet of fuel; and said sleeve means and body means defining therebetween another annular air discharge orifice communicating with said first air passage for discharge of high velocity air to further atomize the fuel-air mixture immediately upon emergence from the large end of said trumpet portion and prior to mixing with air discharged from said first-mentioned annular air discharge passage.
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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) | 1979-09-07 | 1980-03-08 | 1980-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-07 | 1984-03-08 | 1984-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-07 | 1988-03-08 | 1988-09-07 | $7700.00 | Window Closed / Lapsed |