Patent US3139095A successfully refreshed from Google Patents.
US3592291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for suppressing the noise and augmenting the thrust of a jet engine
Assignee: Rohr Inc
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Filing: 1969-11-17
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Granted: 1971-07-13
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Expires: 1989-11-17
Abstract
Abstract Thrust gas of a jet engine is discharged through a lobed nozzle having apertures formed in the wall thereof at the crest of each lobe of the nozzle and at the bottom of each valley between the lobes. The apertures are in the form of flush inlet scoops so that slipstream air flowing past the nozzle enters said apertures and mixes with thrust gas flowing through the nozzle.
Inventors
- 👤 George E Medawar
- 👤 Felix Hom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 23:17
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/46; F02K1/48; F02K1/38
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
99 words
In an aircraft having a jet engine, the combination comprising a nozzle through which thrust gas of said engine is discharged, said nozzle being exposed to the atmosphere so that slipstream air flows past the outer surface thereof during the flight of said aircraft and being formed with a plurality of apertures in the form of flush inlet scoops which extend inwardly through the wall thereof and are spaced apart circumferentially thereon and upstream from the aft end thereof, whereby a portion of said slipstream air flows through said apertures and mixes with said thrust gas inside said nozzle.
Claim 2
Dependent Claim
99 words
In an aircraft having a jet engine, the combination comprising a nozzle through which thrust gas of said engine is discharged, said nozzle being exposed to the atmosphere so that slipstream air flows past the outer surface thereof during the flight of said aircraft and being formed with a plurality of apertures in the form of flush inlet scoops which extend inwardly through the wall thereof and are spaced apart circumferentially thereon and upstream from the aft end thereof, whereby a portion of said slipstream air flows through said apertures and mixes with said thrust gas inside said nozzle.
Claim 3
Dependent Claim
43 words
The combination defined in claim 1 wherein said nozzle is formed with a plurality of axially extending, circumferentially spaced lobes which increase in radial dimension in the downstream direction, and at least one aperture extends through the wall of each of said lobes.
Claim 4
Dependent Claim
34 words
The combination defined in claim 2 wherein at least one aperture extends through the wall of said nozzle at the crest of each of said lobes and at the bottom of each valley therebetween.
Claim 5
Dependent Claim
163 words
The combination defined in claim 2 wherein a plurality of said apertures are axially spaced apart along the crest of each of said lobes and along the bottom of each valley therebetween. 5 A method of operating an aircraft having a jet engine, which comprises passing thrust gas of said engine through a nozzle formed with a plurality of axially extending, circumferentially spaced lobes having a plurality of apertures in the form of flush inlet scoops extending inwardly through the wall thereof upstream of the aft end thereof, said nozzle being exposed to the atmosphere so that slipstream air flows past the outer surface thereof during the flight of said aircraft, whereby a portion of said slipstream air flows through said apertures into the nozzle and mixes with said thrust gas within the nozzle and a portion of said slipstream air flows through the valleys between said lobes and thence between the streams of mixed air and thrust gas issuing from said lobes.
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) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |