US3756529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuselage seal
Assignee: McDonnell Douglas Corp
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Filing: 1972-05-01
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Granted: 1973-09-04
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Expires: 1992-05-01
Abstract
Abstract A seal for the fuselage cutout portion for a movable horizontal stabilizer on an aircraft includes a fixed fairing member attached to the outer fuselage around the cutout portion with a pair of pivotally mounted doors hinged to the upper and lower surfaces of the fixed fairing on respective edges of the cutout portion to reduce the size of the openings on both sides of the stabilizer. Cam members are fixed to the upper and lower stabilizer surfaces for pivoting the doors inwardly upon pivotal movement of the stabilizer. Upper and lower smaller movable fairing members are attached to the stabilizer and lie adjacent the outer surface of the doors and may slide over the doors and fixed fairing for completely sealing the cutout opening during varying attitudes of the stabilizer.
Inventors
- 👤 J Backlund
- 👤 R Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:40
CPC Classifications
B; B64; B64C; B64C5/00; B64C5/02; B64C7/00; B64C9/00; B64C9/02
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
132 words
A fuselage seal for a substantially horizontal control surface of an aircraft pivotally mounted to the fuselage thereof, comprising: a fixed fairing on said fuselage around the area of movement of said control surface, said fairing having a cutout portion where said control surface passes through said fuselage, a movable fairing attached to said control surface, a door pivotally mounted on an edge of said cutout portion, said door having an outer surface forming a continuation of said fixed fairing when said door is in a position undisturbed by said control surface, said movable fairing and said door covering said cutout portion during limited pivotal movement of said control surface, said door being adapted to pivot inwardly upon contact with said control surface to permit greater pivotal movement of said control surface.
Claim 2
Dependent Claim
132 words
A fuselage seal for a substantially horizontal control surface of an aircraft pivotally mounted to the fuselage thereof, comprising: a fixed fairing on said fuselage around the area of movement of said control surface, said fairing having a cutout portion where said control surface passes through said fuselage, a movable fairing attached to said control surface, a door pivotally mounted on an edge of said cutout portion, said door having an outer surface forming a continuation of said fixed fairing when said door is in a position undisturbed by said control surface, said movable fairing and said door covering said cutout portion during limited pivotal movement of said control surface, said door being adapted to pivot inwardly upon contact with said control surface to permit greater pivotal movement of said control surface.
Claim 3
Dependent Claim
29 words
A fuselage seal as in claim 1 and means urging the return of said door to its undisturbed position when said control surface is no longer in contact therewith.
Claim 4
Dependent Claim
28 words
A fuselage seal as in claim 1 wherein cam surfaces are provided on said control surface for deflecting inwardly the edge of said door when in contact therewith.
Claim 5
Dependent Claim
64 words
A fuselage seal as in claim 1 wherein said cutout portion is a vertically oriented wedge-shaped portion positioned forwardly of the pivotal axis of said control surface, said wedge-shaped portion having an upper and a lower edge extending fore and aft along said fairing, and said door being pivotally mounted along said upper edge and another door being pivotally mounted along said lower edge.
Claim 6
Dependent Claim
37 words
A fuselage seal as in claim 4 wherein said control surface has an upper movable fairing and a lower movable fairing to complete the covering of siad cutout portion during limited pivotal movement of said control Surface.
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) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |