US4773596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airblast fuel injector
Assignee: RTX Corp
•
Filing: 1987-04-06
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Granted: 1988-09-27
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Expires: 2007-04-06
Abstract
Abstract A fuel injector assembly for a gas turbine combustor projects a hollow conical spray of fuel. A plurality of discrete surrounding air nozzles 42 project air directly toward the axis 46 of the injector at an angle of 15 degrees, establishing a fuel rich external recirculation zone 52.
Inventors
- 👤 Richard R. Wright
- 👤 Francis C. Pane, Jr.
- 👤 John A. Matthews
- 👤 Edmund E. Striebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:02
CPC Classifications
F; F23; F23C; F23C7/00; F23C7/002; F23C7/004; F23D; F23D11/00; F23D11/10; F23D11/106; F23D11/107; F23R; F23R3/00; F23R3/28; F23R3/283; F23D2900/00; F23D2900/11101
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
96 words
A fuel injector assembly for a gas turbine combustor comprising: a fuel injector means for projecting a substantially hollow conical spray of fuel and air, concentric with an axis of said fuel injector; means for introducing inner air centrally within said hollow conical spray; means for introducing outer air outside said conical pattern in a direction substantially tangent to said hollow conical spray; and a plurality of discrete surrounding air nozzles, surrounding said fuel injector means and said means for introducing outer air, and directing additional air directly toward the axis of said fuel injector means.
Claim 2
Dependent Claim
96 words
A fuel injector assembly for a gas turbine combustor comprising: a fuel injector means for projecting a substantially hollow conical spray of fuel and air, concentric with an axis of said fuel injector; means for introducing inner air centrally within said hollow conical spray; means for introducing outer air outside said conical pattern in a direction substantially tangent to said hollow conical spray; and a plurality of discrete surrounding air nozzles, surrounding said fuel injector means and said means for introducing outer air, and directing additional air directly toward the axis of said fuel injector means.
Claim 3
Dependent Claim
44 words
A fuel injector assembly as in claim 1, said plurality of discrete surrounding air nozzles comprising: a plurality of nozzles circumferentially arranged around said axis directing said additional air at an angle between 12 and 25 degrees from a line parallel to said axis.
Claim 4
Dependent Claim
26 words
A fuel injector assembly as in claim 2: said additional airflow being 25 to 60 percent of the total quantity of said inner and outer airflows.
Claim 5
Dependent Claim
28 words
A fuel injector assembly as in claim 1: said discrete surrounding air nozzles spaced in a circle and having at least 40 percent of the circle nozzle free.
Claim 6
Dependent Claim
27 words
A fuel injector assembly as in claim 1: said plurality of discrete surrounding air nozzles being located within one inch of the axis of said fuel injector.
References Cited (Backward Citations)
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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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |