US3972475A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nozzle construction providing for thermal growth
Assignee: RTX Corp
•
Filing: 1975-07-31
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Granted: 1976-08-03
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Expires: 1995-07-31
Abstract
Abstract An exhaust nozzle has main flaps with seals therebetween. Each flap and seal is constructed having inner and outer members which cooperate to form a liner for passing cooling air therethrough which extends substantially around the entire circumference of the liner. The inner member of each of the seals is riveted at its forward end to a guide and support member which is in turn fixed to its outer member while the remainder of the inner member is permitted thermal growth by sliding on said guide and support member. The outer member is bolted to the guide and support means. Said guide and support means being corrugated to permit cooling flow therethrough with the heighth of the corrugations providing the proper contour for the inner member.
Inventors
- 👤 Roy G. Nelson
- 👤 Louis H. Wolfson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:26
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/12; F02K1/1292
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
In combination with jet engine fixed structure including an exhaust duct; an exhaust nozzle mounted on said fixed structure; said nozzle comprising a circumferential row of flaps; means pivotally mounting said flaps on said fixed structure for controlling the flow of said exhaust duct; seal means being positioned between each pair of flaps to prevent leakage therebetween; said flaps comprising an inner flap member having an outer flap member spaced therefrom; said seal means comprising an inner seal member, a guide and support means, and an outer seal member; said inner seal member being spaced from said outer seal member by said guide and support means; said guide and support means being fixedly mounted to said outer seal member; said inner seal member being fixedly connected to said guide and support means at one point with the remainder of the inner seal member and guide and support means being permitted relative axial movement; said flaps and said seal means cooperating to provide a passageway for coolant flow through said flaps and seal means.
Claim 2
Dependent Claim
173 words
In combination with jet engine fixed structure including an exhaust duct; an exhaust nozzle mounted on said fixed structure; said nozzle comprising a circumferential row of flaps; means pivotally mounting said flaps on said fixed structure for controlling the flow of said exhaust duct; seal means being positioned between each pair of flaps to prevent leakage therebetween; said flaps comprising an inner flap member having an outer flap member spaced therefrom; said seal means comprising an inner seal member, a guide and support means, and an outer seal member; said inner seal member being spaced from said outer seal member by said guide and support means; said guide and support means being fixedly mounted to said outer seal member; said inner seal member being fixedly connected to said guide and support means at one point with the remainder of the inner seal member and guide and support means being permitted relative axial movement; said flaps and said seal means cooperating to provide a passageway for coolant flow through said flaps and seal means.
Claim 3
Dependent Claim
43 words
A combination as set forth in claim 1 wherein said guide and support means is constructed having longitudinal corrugations to provide the proper support for the inner seal member and provide a plurality of passageways for the coolant flow through said seal means.
Claim 4
Dependent Claim
36 words
A combination as set forth in claim 1 wherein said inner seal member is also connected to said guide and support means by interconnecting curved edges along the longitudinal sides thereof to permit axial movement therebetween.
Claim 5
Dependent Claim
27 words
A combination as set forth in claim 1 wherein said outer seal member is fixedly mounted to said guide and support means by a plurality of bolts.
Claim 6
Dependent Claim
29 words
A combination as set forth in claim 2 wherein said corrugations are formed of predetermined heights to provide a predetermined contour to the inner flap member during engine operation.
Claim 7
Dependent Claim
24 words
A combination as set forth in claim 1 wherein said inner seal member is fixed to said guide and support means by a rivet.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-03 | 1980-02-02 | 1980-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-03 | 1984-02-02 | 1984-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-03 | 1988-02-02 | 1988-08-03 | $7700.00 | Window Closed / Lapsed |