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Class Information
Number: 244/199.3
Name: Aeronautics > Aircraft sustentation > Sustaining airfoils > With lift modification > By vortex control outside of boundary layer > Of tip vortex > Active
Description: Subject matter in which the airflow modification device is a jet, propeller, or other moving member located on the airfoil.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7597289 |
Apparatus and method for the control of trailing wake flows |
Oct. 6, 2009 |
| 7316371 |
Method and device for steepening a landing approach of an aircraft |
Jan. 8, 2008 |
| 7017862 |
Wake vortex visualizer for an aircraft |
Mar. 28, 2006 |
| 6394397 |
Lifting surface with active variable tip member and method for influencing lifting surface behavior therewith |
May. 28, 2002 |
| 6082679 |
Active system for early destruction of trailing vortices |
Jul. 4, 2000 |
| 5934612 |
Wingtip vortex device for induced drag reduction and vortex cancellation |
Aug. 10, 1999 |
| 5918835 |
Wingtip vortex impeller device for reducing drag and vortex cancellation |
Jul. 6, 1999 |
| 5806807 |
Airfoil vortex attenuation apparatus and method |
Sep. 15, 1998 |
| 5791875 |
Tip vortex reduction system |
Aug. 11, 1998 |
| 5702071 |
Deployable vortex turbine for dissipating or extracting energy from a lift induced vortex emanating from an aircraft |
Dec. 30, 1997 |
| 5562414 |
Noise reduction device for rotorcraft |
Oct. 8, 1996 |
| 5492289 |
Lifting body with reduced-strength trailing vortices |
Feb. 20, 1996 |
| 5297764 |
Air foil providing vortex attenuation |
Mar. 29, 1994 |
| 5158251 |
Aerodynamic surface tip vortex attenuation system |
Oct. 27, 1992 |
| 5150859 |
Wingtip turbine |
Sep. 29, 1992 |
| 5100085 |
Aircraft wingtip vorticity redistribution apparatus |
Mar. 31, 1992 |
| 4917332 |
Wingtip vortex turbine |
Apr. 17, 1990 |
| 4533101 |
Wingtip vortex propeller |
Aug. 6, 1985 |
| 4478380 |
Wing tip vortices suppressor |
Oct. 23, 1984 |
| 4045144 |
Wind energy concentrators |
Aug. 30, 1977 |
| 4040578 |
Rotor vortex control |
Aug. 9, 1977 |
| 3997132 |
Method and apparatus for controlling tip vortices |
Dec. 14, 1976 |
| 3974986 |
Aircraft wing vortex deflector |
Aug. 17, 1976 |
| 3936013 |
Vortex control |
Feb. 3, 1976 |
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