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Class Information
Number: 244/204
Name: Aeronautics > Aircraft sustentation > Sustaining airfoils > With lift modification > Variable > By controlling boundary layer
Description: Variable lift modifier comprising means within the airfoil, or externally adjacent the surface and upstream of the trailing edge, intended to affect a flow characteristic of that portion of the stream of air which is immediately adjacent the surface of the airfoil.

Sub-classes under this class:

Class Number Class Name Patents
244/204.1 Actively controlled vortex generator 64
244/212 Having trailing edge flap 59
244/207 With blowing 224
244/205 With ionic or electrostatic surface 43
244/210 With nose slot 39
244/206 With rotating member 26
244/209 With suction 77

Patents under this class:
1 2 3 4

Patent Number Title Of Patent Date Issued
5358156 Supersonic aircraft shock wave energy recovery system Oct. 25, 1994
5359663 Method and system for suppressing noise induced in a fluid medium by a body moving therethrough Oct. 25, 1994
5354017 Method for controlling turbulence Oct. 11, 1994
5348256 Supersonic aircraft and method Sep. 20, 1994
5335885 Aircraft wing having a super critical profile and a venting device for reducing compression shock Aug. 9, 1994
5322246 Ice prevention device for airfoils Jun. 21, 1994
5322242 High efficiency, supersonic aircraft Jun. 21, 1994
5320309 Electromagnetic device and method for boundary layer control Jun. 14, 1994
5319608 Method and system for identifying the onset of a turbulent boundary layer induced by a body moving through a fluid medium Jun. 7, 1994
5314142 Wing root aerofoil for forward swept wings May. 24, 1994
5255881 Lift augmentation for highly swept wing aircraft Oct. 26, 1993
5209438 Method and apparatus for delaying the separation of flow from a solid surface May. 11, 1993
5200621 Off-surface infrared flow visualization Apr. 6, 1993
5167387 Porous airfoil and process Dec. 1, 1992
5141182 Gas turbine engine fan duct base pressure drag reduction Aug. 25, 1992
4976349 Aerofoil/hydrofoil Dec. 11, 1990
4932610 Active control of boundary layer transition and turbulence Jun. 12, 1990
4860976 Attached jet spanwise blowing lift augmentation system Aug. 29, 1989
4802642 Control of laminar flow in fluids by means of acoustic energy Feb. 7, 1989
4786020 System for boundary layer control through pulsed heating of a strip heater Nov. 22, 1988
4741498 Ultrasonic drag reduction and lift increase May. 3, 1988
4726548 Airfoil self energizing boundary layer control system Feb. 23, 1988
4702441 Aircraft wing stall control device and method Oct. 27, 1987
4619423 Geometries for roughness shapes in laminar flow Oct. 28, 1986
4540143 Nacelle/wing assembly with wake control device Sep. 10, 1985
4522360 Passive drag control of airfoils at transonic speeds Jun. 11, 1985
4516747 Method of and apparatus for controlling the boundary layer flow over the surface of a body May. 14, 1985
4392621 Directional control of engine exhaust thrust vector in a STOL-type aircraft Jul. 12, 1983
4202518 Air-borne support and lift mechanism adapted to aircraft May. 13, 1980
4172574 Fluid stream deflecting members for aircraft bodies or the like Oct. 30, 1979
4146197 Boundary layer scoop for the enhancement of Coanda effect flow deflection over a wing/flap surface Mar. 27, 1979
4121791 Aircraft built up from individual readily assembled and disassembled segments or components Oct. 24, 1978
4117996 Variable aerodynamic compression flaps Oct. 3, 1978
4114836 Airplane configuration designed for the simultaneous reduction of drag and sonic boom Sep. 19, 1978

1 2 3 4

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