US PATENT SUBCLASS 244 / 216
.~.~.~.~.~.~ Variable gap type, e.g., "Fowler Flap"

Current as of: June, 1999
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244 /   HD   AERONAUTICS

34 R  DF  AIRCRAFT SUSTENTATION {2}
35 R  DF  .~ Sustaining airfoils {7}
198  DF  .~.~ With lift modification {3}
201  DF  .~.~.~ Variable {6}
213  DF  .~.~.~.~ By flap and/or spoiler {2}
215  DF  .~.~.~.~.~ At trailing edge {2}
216.~.~.~.~.~.~ Variable gap type, e.g., "Fowler Flap"

DEFINITION

Classification: 244/216

(under subclass 215) A flap which moves relative to the airfoil in such a manner as to create a slot with a changeable dimension between itself and the airfoil.