Patent US3820720A successfully refreshed from Google Patents.
US3820720A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flap synchronizing control means
Assignee: RTX Corp
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Filing: 1973-08-29
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Granted: 1974-06-28
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Expires: 1993-08-29
Abstract
Abstract A nozzle arrangement is shown having an actuation device at the rear end of flaps which are pivoted intermediate their ends thereof and synchronizing means adjacent the forward ends of the pivoted flaps. The actuating means are shown in detail in U.S. Pat. No. 3,730,436 and the forward synchronizing means comprises engaging male and female members which maintain the nozzle in ''''round'''' and are located forward of the pivot point of the flaps so that the male and female members will have their maximum engagement and therefore maximum rigidity at the maximum throat area of the nozzle, said throat area being directly proportional to the position of the rear ends of the flaps. This invention herein described was made in the course of or under a contract with the Department of the Air Force.
Inventors
- 👤 L Anders
- 👤 J Sutton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 14:34
CPC Classifications
F; F02; F02K; F02K1/00; F02K1/06; F02K1/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
144 words
In combination in an engine, an exhaust nozzle mounted thereon, said nozzle comprising a circumferential row of pivotally mountEd main flaps, each flap having an inner and outer surface, each flap having forward and rearward ends, each flap having sides, said inner surfaces forming an inner surface of said nozzle for controlling flow therethrough, actuating means for each of said main flaps, means pivotally mounting each flap between its forward and rearward ends, said actuating means being connected to said main flaps rearwardly of said pivotal mounting means, synchronizing means being connected to said main flaps forwardly of said pivotal mounting means, said synchronizing means comprising telescoping means located between adjacent sides of adjacent main flaps, said telescoping means comprising a male member projecting from the side of one flap having engagement with a female member projecting from the side of the adjacent flap.
Claim 2
Dependent Claim
144 words
In combination in an engine, an exhaust nozzle mounted thereon, said nozzle comprising a circumferential row of pivotally mountEd main flaps, each flap having an inner and outer surface, each flap having forward and rearward ends, each flap having sides, said inner surfaces forming an inner surface of said nozzle for controlling flow therethrough, actuating means for each of said main flaps, means pivotally mounting each flap between its forward and rearward ends, said actuating means being connected to said main flaps rearwardly of said pivotal mounting means, synchronizing means being connected to said main flaps forwardly of said pivotal mounting means, said synchronizing means comprising telescoping means located between adjacent sides of adjacent main flaps, said telescoping means comprising a male member projecting from the side of one flap having engagement with a female member projecting from the side of the adjacent flap.
Claim 3
Dependent Claim
37 words
A combination as set forth in claim 1 wherein each main flap is mounted between two inwardly extending bracket members, adjacent bracket members of adjacent flaps being connected by projections to prevent bending of the bracket members.
Claim 4
Dependent Claim
27 words
A combination as set forth in claim 1 wherein said male member is connected to a bracket fixed to the side and outer surface of the flap.
Claim 5
Dependent Claim
41 words
A combination as set forth in claim 3 wherein part of the bracket fixed to the outer surface of the flap is fixed to a pin which extends through and is fixed to the flap to support the bracket in shear.
Claim 6
Dependent Claim
18 words
A combination as set forth in claim 3 wherein said male member is removably fixed to its bracket.
Claim 7
Dependent Claim
29 words
A combination as set forth in claim 1 wherein the male member has a clearance of 0.020 inches in the female member in the transverse plane of the flap.
Claim 8
Dependent Claim
40 words
A combination as set forth in claim 1 wherein the male member and female member are positioned so that in operation the engagement varies between its greatest engagement at nozzle open position and its least engagement at nozzle closed position.
Claim 9
Dependent Claim
26 words
A combination as set forth in claim 7 wherein the least engagement of the male member and female member is approximately half of the greatest engagement.
Claim 10
Dependent Claim
28 words
A combination as set forth in claim 8 wherein the greatest engagement is approximately one and one-half inches and the least engagement is approximately 0.7 of an inch.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-27 | 1977-12-27 | 1978-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-27 | 1981-12-27 | 1982-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-27 | 1985-12-27 | 1986-06-28 | $7700.00 | Window Closed / Lapsed |