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Class Information
Number: 244/199.2
Name: Aeronautics > Aircraft sustentation > Sustaining airfoils > With lift modification > By vortex control outside of boundary layer > Of tip vortex
Description: Subject matter in which the airflow modification device acts upon a vortex (i.e., tip vortex) located at an outer end portion (i.e., tip) of the airfoil.










Sub-classes under this class:

Class Number Class Name Patents
244/199.3 Active 41
244/199.4 Wing tip foils/fences 92


Patents under this class:

Patent Number Title Of Patent Date Issued
8382041 Rakelet Feb. 26, 2013
8366056 Winglet Feb. 5, 2013
8342456 Wing tip device Jan. 1, 2013
8336827 Method and device for reducing the induced speeds in vortices in the wake of an aircraft Dec. 25, 2012
8328516 Systems and methods of assembling a rotor blade extension for use in a wind turbine Dec. 11, 2012
8226025 Wing tip docking system for aircraft Jul. 24, 2012
8096513 Aerodynamic flap of an aircraft having a device which influences the flap vortex Jan. 17, 2012
8061661 System and method for reducing airfoil vortices Nov. 22, 2011
7988100 Wing tip device Aug. 2, 2011
7780120 Flight control method and apparatus to produce induced yaw Aug. 24, 2010
7744038 Controllable winglets Jun. 29, 2010
7661629 Systems and methods for destabilizing an airfoil vortex Feb. 16, 2010
7637462 Surface flow diverting and static charging ducted pores on wing or blade tip to reduce wake and BVI noise Dec. 29, 2009
7503527 Flight control method and apparatus to produce induced yaw Mar. 17, 2009
6422518 Aircraft with means for a premature breakdown of the wing vortex pair Jul. 23, 2002
5992793 Aerofoil Nov. 30, 1999
5871174 Foils Feb. 16, 1999
5788191 Half-plow vortex generators for rotor blades for reducing blade-vortex interaction noise Aug. 4, 1998
5785282 Half-plow vortex generators for rotorcraft blades for reducing blade-vortex interaction noise Jul. 28, 1998
5634613 Tip vortex generation technology for creating a lift enhancing and drag reducing upwash effect Jun. 3, 1997
5437419 Rotorcraft blade-vortex interaction controller Aug. 1, 1995
5230486 Underwing compression vortex attenuation device Jul. 27, 1993
4705240 Passive vortex lift control Nov. 10, 1987
4697769 Method and apparatus for controlling bound vortices in the vicinity of lifting surfaces Oct. 6, 1987
4477042 Vortex alleviating wing tip Oct. 16, 1984
4362280 Method and apparatus for reducing destructive effects of tornados Dec. 7, 1982
4108403 Vortex reducing wing tip Aug. 22, 1978
3934844 Free vortex aircraft Jan. 27, 1976











 
 
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