US3698664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft
Assignee: BAE Systems PLC
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Filing: 1971-01-11
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Granted: 1972-10-17
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Expires: 1991-01-11
Abstract
Abstract In an aircraft wing flap extending and retracting assembly, the flap is carried from a pivotal mounting on a downward extension of a main bogie that runs in a main track fixed to the trailing portion of the wing, and is additionally supported, at a position displaced in the fore-and-aft direction from the main pivot, by a support member that depends from a further pivot on the main bogie and carries a runner travelling along a incidence control track. Both the main and incidence control tracks are above the recess in which the flap is housed when retracted, and above the path followed by the flap when it extends, so that the flap is not interrupted to allow passage of either track. A tab pivoted on the flap is operated by a linkage connection to the main bogie.
Inventors
- 👤 Kenneth Victor Bonney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 05:52
CPC Classifications
B; B64; B64C; B64C9/00; B64C9/14; B64C9/16; B64C9/20; Y; Y02; Y02T; Y02T50/00; Y02T50/30; Y02T50/40
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
206 words
An aircrafT wing flap assembly, comprising a wing with a trailing portion having a recess in its underside shaped to receive a movable wing flap when the flap is retracted, a wing flap occupying a position in said recess when retracted, means for translating said flap between said retracted position and an extended position substantially aft of said wing trailing portion, a flap support track fixed to said wing trailing portion and extending generally fore and aft above said recess so that the flap when retracted is substantially wholly at a level below said flap support track, a bogie mounted to travel along said flap support track, flap suspension means pivotally suspending said flap from said bogie, flap incidence control track means fixed to said wing trailing portion and extending aft of said flap when the flap is retracted but lying above the path taken by the flap as it translates between its retracted and extended positions, and an incidence control runner which travels along said incidence control track means as said flap translates and has a connection to said flap whereby said flap is turned about its suspension pivot on said flap suspension means during translation of the flap thereby to change the flap incidence.
Claim 2
Dependent Claim
206 words
An aircrafT wing flap assembly, comprising a wing with a trailing portion having a recess in its underside shaped to receive a movable wing flap when the flap is retracted, a wing flap occupying a position in said recess when retracted, means for translating said flap between said retracted position and an extended position substantially aft of said wing trailing portion, a flap support track fixed to said wing trailing portion and extending generally fore and aft above said recess so that the flap when retracted is substantially wholly at a level below said flap support track, a bogie mounted to travel along said flap support track, flap suspension means pivotally suspending said flap from said bogie, flap incidence control track means fixed to said wing trailing portion and extending aft of said flap when the flap is retracted but lying above the path taken by the flap as it translates between its retracted and extended positions, and an incidence control runner which travels along said incidence control track means as said flap translates and has a connection to said flap whereby said flap is turned about its suspension pivot on said flap suspension means during translation of the flap thereby to change the flap incidence.
Claim 3
Dependent Claim
41 words
An assembly according to claim 1, wherein the flap comprises a main flap section and a separable and relatively deflectable tab section, the tab being operated automatically as the flap is extended by a linkage interconnecting the tab and the bogie.
Claim 4
Dependent Claim
63 words
An assembly according to claim 2, wherein two tracks are fixed to the trailing portion of the wing one above the other, so that they extend generally fore-and-aft over said recess in the underside of the wing trailing portion in which the flap is received when retracted, the lower track guiding the bogie while the upper track constitutes the incidence control track means.
Claim 5
Dependent Claim
65 words
An assembly according to claim 3, wherein the flap is pivotally mounted, in the region of its center of lift, on a rearward and downward extension of the bogie, and is additionally supported at its nose by a connection to a rocking lever that depends from a pivot on the bogie and has a portion carrying said runner that travels along the incidence control track.
Claim 6
Dependent Claim
38 words
An assembly according to claim 4, wherein the bogie track is substantially part-circular and the incidence control track is cranked and has a portion gradually rising in the rearward direction followed by a more sharply descending after portion.
Claim 7
Dependent Claim
43 words
An assembly according to claim 4, wherein the tab-operating linkage is connected to a second rocking lever that depends from a pivot on the bogie and has a portion carrying a second runner that travels along the bogie track aft of the bogie.
Claim 8
Dependent Claim
45 words
An assembly according to claim 3, wherein the flap is pivotally mounted, in the region of its nose, on a downward extension of the bogie, and is additionally supported further aft by a further bogie section carrying said runner travelling along the incidence control track.
Claim 9
Dependent Claim
32 words
An assembly according to claim 7, wherein said further bogie section is articulated to the main bogie, and the flap is supported by it through the intermediary of a swinging depending link.
Claim 10
Dependent Claim
24 words
An assembly according to claim 7, wherein the bogie track is substantially straight and the incidence control track is of the ''''hockey stick'''' type.
Claim 11
Dependent Claim
84 words
An assembly according to claim 2, wherein the flap is pivotally mounted, in the region of its nose, on a downward extension of the bogie and is additionally supported further aft by a swinging link pivotally connected to a rocking lever that extends down from a pivot on the bogie and has a portion carrying said runner that travels in the bogie track aft of the bogie, the track being primarily part-circular but having a rearward upturned extension constituting said incidence control track means.
Claim 12
Dependent Claim
14 words
An assembly according to claim 10, wherein the tab-operating linkage includes the swinging link.
Claim 13
Dependent Claim
49 words
An assembly according to claim 10, wherein the bogie track has an additional extreme aft end portion of its upturned extension that serves to bring about lift dumping and increased drag by deflection and separation of the tab to an extent such that the tab enters a ''''stalled'''' condition.
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |