US3794244A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal centering and retention means
Assignee: RTX Corp
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Filing: 1971-12-20
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Granted: 1974-02-26
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Expires: 1991-12-20
Abstract
Abstract A nozzle having a set of flaps is formed on the exhaust end of a turbojet engine. Seal means are provided between adjacent flaps so that the area between the nozzle flaps will have a minimum flow loss between them as they are moved between their minimum area position and maximum area position. A seal flap is located between each pair of nozzle flaps and is maintained centered by a track on the seal flap and links connected to the adjacent sides of the nozzle flaps. A guide at the free end of the links is guided on said track. A guide member positions the flap axially and prevents it from being lifted from the surface of said nozzle flaps.
Inventors
- 👤 Math C Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:44
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/78; F02K1/80; F02K1/805; B; B64; B64D; B64D33/00; B64D33/04; F05; F05D; F05D2250/00; F05D2250/30; F05D2250/31
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
190 words
A nozzle having a plurality of nozzle flaps pivotally mounted thereon, each of said nozzle flaps having an inner and outer surface, each of said nozzle flaps having a side edge, a seal flap mounted between each of said adjacent nozzle flaps, each of said seal flaps having an inner and outer surface, each seal flap having overlapping engagement between its outer surface and said inner surfaces of adjacent nozzle flaps, means for centering each seal flap between the adjacent nozzle flaps, means for keeping each seal flap against the adjacent nozzle flaps, said means for centering each seal flap including a track means fixed to the outer surface of said seal flap between adjacent side edges of adjacent nozzle flaps, track follower means mounted on said track means for relative axial movement therewith, a link connecting the side edge of each adjacent nozzle flap to said track follower, means pivotally mounting one end of each link to a track means, second means pivotally mounting the other end of each link to the adjacent edge of its cooperating nozzle flap, each link extending in line with its cooperating nozzle flap.
Claim 2
Dependent Claim
190 words
A nozzle having a plurality of nozzle flaps pivotally mounted thereon, each of said nozzle flaps having an inner and outer surface, each of said nozzle flaps having a side edge, a seal flap mounted between each of said adjacent nozzle flaps, each of said seal flaps having an inner and outer surface, each seal flap having overlapping engagement between its outer surface and said inner surfaces of adjacent nozzle flaps, means for centering each seal flap between the adjacent nozzle flaps, means for keeping each seal flap against the adjacent nozzle flaps, said means for centering each seal flap including a track means fixed to the outer surface of said seal flap between adjacent side edges of adjacent nozzle flaps, track follower means mounted on said track means for relative axial movement therewith, a link connecting the side edge of each adjacent nozzle flap to said track follower, means pivotally mounting one end of each link to a track means, second means pivotally mounting the other end of each link to the adjacent edge of its cooperating nozzle flap, each link extending in line with its cooperating nozzle flap.
Claim 3
Dependent Claim
23 words
A nozzle as set forth in claim 1 wherein each link is mounted in a recess in the edge of the nozzle flap.
Claim 4
Dependent Claim
36 words
A nozzle as set forth in claim 2 wherein each recess is of such a length so as to receive the full length of a link when the nozzle flaps are in their minimum area position.
Claim 5
Dependent Claim
41 words
A nozzle as set forth in claim 1 wherein said means for keeping each seal flap against adjacent nozzle flaps comprises a guide member fixed to each seal flap, each guide member extending over the outer surfaces of adjacent nozzle flaps.
Claim 6
Dependent Claim
73 words
A nozzle as set forth in claim 4 including means for positioning the longitudinal position of each seal flap, said means for fixing the longitudinal position of each seal flap includes on each side of said guide member on opposite sides of said track means a longitudinal hole therethrough extending outwardly from said track means, follower means extending from the outer surface of adjacent flaps, said follower means extending through said longitudinal holes.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |