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US3974986A Expired / Lapsed US ⏱️ 0.0 years remaining

Aircraft wing vortex deflector

Assignee: Individual
•
Filing: 1974-11-25
•
Granted: 1976-08-17
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Expires: 1994-11-25
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Abstract

Abstract An aircraft wing vortex deflector constituting means for intercepting at least a part of the spiral flow of air around the tips of the wings during flight and directing the intercepted air rearwardly in a manner and direction tending to dissipate vortices in the wake of the aircraft.

Inventors

  • 👤 Edmund H. Johnstone

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-04 17:51
CPC Classifications
B; B64; B64C; B64C23/00; B64C23/06; B64C2230/00; B64C2230/20; Y; Y02; Y02T; Y02T50/00; Y02T50/10

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 249 words
In an aircraft, in combination, wings each having a continuous uninterrupted leading edge and a tip portion, each wing producing a lifting airfoil reaction during flight and each tip portion being characterized by flow of air therearound in a spiral path defining vortices in the wake of the wing tip during flight, and deflector means located at the tip portion of each wing and effective to intercept and receive at least a part of the vortex-tending air flow as it occurs at the wing tip during flight and divert the received air flow rearwardly of the direction of flight, said deflector means being confined within the wing and including a chamber within the tip portion of each wing, said chamber being elongated substantially in the direction of flight, air inlet means at each wing tip portion rearwardly of said leading edge occurring along the length of and communicating with said chamber, said inlet means being located below the top surface of the wing to intercept and receive some of said air vortices occurring at each wing tip, and air outlet means at each wing communicating with said chamber and discharging rearwardly during flight, said deflector means functioning to intercept some air from said air vortices for flow through said inlet means and chamber for discharge at said outlet means only in response to the angular momentum and velocity of said wing tip vortices occurring at each wing tip and to the flow of air over each wing during flight.
Claim 2
Dependent Claim 249 words
In an aircraft, in combination, wings each having a continuous uninterrupted leading edge and a tip portion, each wing producing a lifting airfoil reaction during flight and each tip portion being characterized by flow of air therearound in a spiral path defining vortices in the wake of the wing tip during flight, and deflector means located at the tip portion of each wing and effective to intercept and receive at least a part of the vortex-tending air flow as it occurs at the wing tip during flight and divert the received air flow rearwardly of the direction of flight, said deflector means being confined within the wing and including a chamber within the tip portion of each wing, said chamber being elongated substantially in the direction of flight, air inlet means at each wing tip portion rearwardly of said leading edge occurring along the length of and communicating with said chamber, said inlet means being located below the top surface of the wing to intercept and receive some of said air vortices occurring at each wing tip, and air outlet means at each wing communicating with said chamber and discharging rearwardly during flight, said deflector means functioning to intercept some air from said air vortices for flow through said inlet means and chamber for discharge at said outlet means only in response to the angular momentum and velocity of said wing tip vortices occurring at each wing tip and to the flow of air over each wing during flight.
Claim 3
Dependent Claim 92 words
The construction defined in claim 1, wherein said elongated chamber extends fore and aft within each wing tip portion, said air inlet means constituting a plurality of openings at the lower part of the wing tip portion and spaced apart substantially in the direction of flight, and said air outlet means including a conduit within the wing communicating with and extending inboard from said chamber to a discharge opening extending lengthwise of and at the top of the wing to direct air from said conduit toward the trailing edge of the wing.

References Cited (Backward Citations)

US2075817A Cited
US2406921A Cited
US2406923A Cited
US3596854A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1979-08-17 1980-02-16 1980-08-17 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1983-08-17 1984-02-16 1984-08-17 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1987-08-17 1988-02-16 1988-08-17 $7700.00 Window Closed / Lapsed

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