US3596836A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convergent-divergent rectangular section nozzle
Assignee: Rolls Royce PLC
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Filing: 1969-09-11
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Granted: 1971-08-03
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Expires: 1989-09-11
Abstract
Abstract The disclosure of this invention pertains to a convergentdivergent rectangular section nozzle for jet propulsion engines. To convert the nozzle into a convergent-only configuration one of the four walls of the divergent part is movable into a position adjacent the convergent part thereby allowing the ambient slipstream to enter the nozzle immediately downstream of the throat thereof.
Inventors
- 👤 Ralph Murch Denning
- 👤 Reginald Harold Wiltshire
- 👤 Stephen Sales
- 👤 Alexander Scott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:55
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/09; F05; F05D; F05D2250/00; F05D2250/10; F05D2250/12; F05D2250/30; F05D2250/32; F05D2250/323; F05D2250/324
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
133 words
A jet nozzle for a jet propulsion engine comprising four rectangularly related walls one of which is translatable in the direction of the length of the nozzle relative to its two adjacent walls, the translatable wall extending curvedly away from the interior of the nozzle between two edge portions of the translatable wall parallel to the length of the nozzle, the translatable wall being made of flexible sheet material so as to accommodate thermal and like structural changes by changes in curvature, in respect of each of said edges and bearing means having a fixed part adapted to support the edge portion for the translation of the wall and further adapted to support the edge portion for pivotal movement about an axis parallel to the direction of translation to accommodate said curvature changes.
Claim 2
Dependent Claim
133 words
A jet nozzle for a jet propulsion engine comprising four rectangularly related walls one of which is translatable in the direction of the length of the nozzle relative to its two adjacent walls, the translatable wall extending curvedly away from the interior of the nozzle between two edge portions of the translatable wall parallel to the length of the nozzle, the translatable wall being made of flexible sheet material so as to accommodate thermal and like structural changes by changes in curvature, in respect of each of said edges and bearing means having a fixed part adapted to support the edge portion for the translation of the wall and further adapted to support the edge portion for pivotal movement about an axis parallel to the direction of translation to accommodate said curvature changes.
Claim 3
Dependent Claim
59 words
A jet nozzle according to claim 1 each fixed part having a bearing surface facing away from the translatable wall and the adjacent edge portion having a cooperating bearing surface facing towards the wall, whereby the tension created in the curved wall by the pressure of the gases in the nozzle is reacted by pressure between the bearing surfaces.
Claim 4
Dependent Claim
31 words
A nozzle according to claim 2, wherein one of the bearing surfaces is curved about an axis parallel to the length of the adjacent edge portion to accommodate said pivotal movement.
Claim 5
Dependent Claim
63 words
A nozzle according to claim 3, wherein a seal between the translatable wall and each of the walls adjacent thereto comprises a first and second seal elements provided respectively on the translatable wall and on the adjacent wall, and wherein at least one of the seal elements is curved about said axis of one of the bearing surfaces to accommodate said pivotal movement.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |