US3662959A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuel injection nozzle
Assignee: Parker Hannifin Corp
•
Filing: 1970-08-07
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Granted: 1972-05-16
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Expires: 1990-08-07
Abstract
Abstract A fuel injection nozzle of the dual orifice type characterized in that the elongated primary fuel passage in the nozzle housing is constituted by a length of tube which is thermally isolated from the housing whereby the flow of fuel through the tube maintains the interior wall thereof at a temperature below that at which carbonizing of the fuel would occur.
Inventors
- 👤 Harry Sample Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 21:06
CPC Classifications
F; F23; F23R; F23R3/00; F23R3/28; F23D; F23D11/00; F23D11/24; F23D11/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
118 words
In a dual orifice fuel injection nozzle assembly wherein an elongated housing has primary and secondary fuel supply passages therein leading to the respective primary and secondary discharge orifices of a dual orifice nozzle at one end of said housing operative to spray fuel into the combustion chamber of a gas turbine or the like, the improvement which comprises an elongated open ended metallic tube loosely disposed in a bore in said housing and constituting a substantial portion of the length of the primary fuel supply passage; said tube being thus thermally isolated from said housing whereby primary fuel flowing through said tube cools the interior wall thereof to prevent carbonizing of the fuel flowing in contact therewith.
Claim 2
Dependent Claim
118 words
In a dual orifice fuel injection nozzle assembly wherein an elongated housing has primary and secondary fuel supply passages therein leading to the respective primary and secondary discharge orifices of a dual orifice nozzle at one end of said housing operative to spray fuel into the combustion chamber of a gas turbine or the like, the improvement which comprises an elongated open ended metallic tube loosely disposed in a bore in said housing and constituting a substantial portion of the length of the primary fuel supply passage; said tube being thus thermally isolated from said housing whereby primary fuel flowing through said tube cools the interior wall thereof to prevent carbonizing of the fuel flowing in contact therewith.
Claim 3
Dependent Claim
27 words
The fuel injection nozzle assembly of claim 1, wherein said housing has a flow divider therein for flow of fuel therethrough into said secondary fuel supply passage.
Claim 4
Dependent Claim
28 words
The fuel injection nozzle assembly of claim 1, wherein said housing has means radially overlapping one end of said tube to limit axial movement thereof in said bore.
Claim 5
Dependent Claim
22 words
The fuel injection nozzle assembly of claim 3, wherein said bore has a stop shoulder adjacent the other end of said tube.
Claim 6
Dependent Claim
33 words
The fuel injection nozzle assembly of claim 3, wherein said one end of said tube, adjacent to the end of said bore, is enlarged to a diameter greater than that of said bore.
References Cited (Backward Citations)
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Cited
US2959360A
Cited
US3029029A
Cited
US3131866A
Cited
US3154095A
Cited
US3379374A
Cited
US3387790A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |