Patent US3612209A successfully refreshed from Google Patents.
US3612209A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Propulsion nozzle with combined thrust reverser and sound suppressor mechanism
Assignee: General Electric Co
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Filing: 1969-11-28
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Granted: 1971-10-12
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Expires: 1989-11-28
Abstract
Abstract A convergent-divergent nozzle for supersonic propulsion is shown. Flaps are pivotally mounted at the throat of the divergent, secondary nozzle and form a part of the secondary nozzle during normal supersonic propulsion. Spaced flaps, on opposite sides of the nozzle, are pivoted inwardly for sound suppression. All of the flaps are pivoted inwardly to block the hot gas stream and direct it forwardly and laterally through blow-in doors to provide reverse thrust. The flaps are controlled by a unique linkage system.
Inventors
- 👤 John W Vdoviak
- 👤 Roy A Krabacher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 20:41
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/12; F02K1/1269; F02K1/46; F02K1/54; F02K1/56; F02K1/62; Y; Y02; Y02T; Y02T50/00; Y02T50/60
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
136 words
A convergent-divergent nozzle for supersonic propulsion of aircraft, said nozzle comprising, a primary convergent nozzle from which a hot gas stream is discharged, a secondary divergent nozzle axially spaced from the primary nozzle, means for introducing cool air in the spacing between said primary nozzle and said secondary nozzle at the throat of the latter, a plurality of flaps extending downstream of said throat comprising said secondary nozzle, and means for swinging selected, angularly spaced flaps inwardly from said throat to mix cool air with partially expanded hot gas stream discharged from the primary nozzle, thus suppressing the noise generated by the nozzle and for swinging all of the flaps inwardly to block the hot gas stream and deflect it laterally and forwardly through the spacing between said primary and secondary nozzles to provide reverse thrust.
Claim 2
Dependent Claim
136 words
A convergent-divergent nozzle for supersonic propulsion of aircraft, said nozzle comprising, a primary convergent nozzle from which a hot gas stream is discharged, a secondary divergent nozzle axially spaced from the primary nozzle, means for introducing cool air in the spacing between said primary nozzle and said secondary nozzle at the throat of the latter, a plurality of flaps extending downstream of said throat comprising said secondary nozzle, and means for swinging selected, angularly spaced flaps inwardly from said throat to mix cool air with partially expanded hot gas stream discharged from the primary nozzle, thus suppressing the noise generated by the nozzle and for swinging all of the flaps inwardly to block the hot gas stream and deflect it laterally and forwardly through the spacing between said primary and secondary nozzles to provide reverse thrust.
Claim 3
Dependent Claim
18 words
A nozzle as in claim 1 wherein, said selected flaps are on opposite lateral sides of the nozzle.
Claim 4
Dependent Claim
59 words
A nozzle as in claim 1 wherein, the selected flaps are swung into the hot gas stream at a relatively low angle to mix cool air therewith and the outer ends of the selected flaps are spaced from the secondary nozzle when so disposed to provide a flow path for cool air and thus further increase the mixing action.
Claim 5
Dependent Claim
48 words
A nozzle as in claim 3, further comprising, damper doors, pivoted by the other flaps adjacent the selected flaps, which are swung by said other flaps to close the spacings between the selected flaps and the secondary nozzle when the hot gas stream is blocked for reverse thrust.
Claim 6
Dependent Claim
42 words
A nozzle as in claim 1 wherein, the swinging means comprises one actuating means for swinging the selected flaps and another actuating means for swinging the remainder of the flaps and the separate actuating meAns are both operable independently of each other.
Claim 7
Dependent Claim
107 words
A nozzle as in claim 1 wherein, the flaps are pivotally mounted at the throat of the secondary nozzle, the swinging means comprise a linkage system connected to said selected flaps and bellcranks, and actuator means for pivoting said bellcranks, said linkage means being responsive to pivotal movement of the bellcranks to swing the selected flaps to their mixing positions and similar linkage means connected to the other flaps and relatively fixed pivots, an actuator ring and links connecting both linkages to said actuation ring, said linkages being responsive to longitudinal movement of the actuation right to swing all of the flaps to their reverse thrust positions.
Claim 8
Dependent Claim
71 words
A nozzle as in claim 6 wherein, the selected flaps are swung into the hot gas stream at relatively low angles in their mixing positions and the selected flaps include arms extending to the pivotal throat mounting to space the outer ends of said selected flaps from the throat when they are swung to their mixing positions, thus providing a flow path for cool air thereover and an increased mixing action.
Claim 9
Dependent Claim
39 words
A nozzle as in claim 7 wherein, blow-in doors provide at least a part of the means for introducing cool air and through which the hot gas is discharged when it is blocked by the flaps for reverse thrust.
Claim 10
Dependent Claim
63 words
A nozzle as in claim 7 further comprising, damper doors respectively pivotally mounted on the same axes as the selected flaps and means interconnecting said damper doors and adjacent other flaps for swinging the damper doors therewith, thereby blocking the spacing between the outer ends of the selected flaps and the secondary nozzle throat when the flaps are in their reverse thrust positions.
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |