Patent US3970083A successfully refreshed from Google Patents.
Patent US3735930A successfully refreshed from Google Patents.
US3735930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection nozzle
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1971-09-29
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Granted: 1973-05-29
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Expires: 1991-09-29
Abstract
Abstract A fuel nozzle structure for a combustion chamber, the downstream portion of the nozzle structure having a plurality of hollow nozzle inserts disposed therethrough, and a nozzle cover in spaced relation with the downstream nozzle portion and defining a cooling air passageway therebetween. The nozzle inserts project into apertures in the nozzle cover so that fuel can be projected through the cover and into the combustion chamber and the inserts being in spaced relation with the cover so as to allow cooling air flowing through the passageway to flow into the combustion chamber. This fuel nozzle structure prevents residues from collecting on the downstream nozzle portion.
Inventors
- 👤 Y M Kobe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:01
CPC Classifications
F; F23; F23D; F23D11/00; F23D11/36; F23R; F23R3/00; F23R3/28; F05; F05B; F05B2220/00; F05B2220/30; F05B2220/302
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
73 words
A combustion chamber having a fuel nozzle structure to inject fuel therein, said nozzle structure having a downstream nozzle tip portion, a nozzle cover structure surrounding the downstream tip portion of the nozzle, said cover structure shielding the nozzle tip portion from the heat generated in said combustion chamber, the downstream wall of said nozzle tip portion having a plurality of apertures, and said nozzle cover structure having a corresponding plurality of apertures.
Claim 2
Dependent Claim
73 words
A combustion chamber having a fuel nozzle structure to inject fuel therein, said nozzle structure having a downstream nozzle tip portion, a nozzle cover structure surrounding the downstream tip portion of the nozzle, said cover structure shielding the nozzle tip portion from the heat generated in said combustion chamber, the downstream wall of said nozzle tip portion having a plurality of apertures, and said nozzle cover structure having a corresponding plurality of apertures.
Claim 3
Dependent Claim
34 words
The structure recited in claim 1, and further including a plurality of nozzle insert structures disposed in the apertures in the nozzle tip, said nozzle inserts projecting into the apertures in the nozzle cover.
Claim 4
Dependent Claim
31 words
The structure recited in claim 2, wherein the nozzle inserts are fastened to the nozzle structure and wherein the nozzle inserts are in a spaced relation relative to the nozzle cover.
Claim 5
Dependent Claim
15 words
The structure recited in claim 2 and further including cooling means for the nozzle inserts.
Claim 6
Dependent Claim
120 words
The structure recited in claim 1, wherein the nozzle cover is in spaced relation with the nozzle tip defining the cooling air passageway therebetween, means to supply cooling air to said passageway, a plurality of corresponding apertures in the nozzle tip and the nozzle cover, a plurality of nozzle insert structures disposed in the apertures in the nozzle tip and fastened to the tip, said insert structures projecting into the corresponding apertures in the nozzle cover and in spaced relation therefrom, the apertures in the nozzle cover being in fluid communication with the cooling air passageway, to allow cooling air to flow through said passageway and said apertures into the combustion chamber to cool the nozzle tip and nozzle inserts.
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |