US PATENT SUBCLASS 280 / 429
.~.~.~.~ Landing gear actuated by coupling action

Current as of: June, 1999
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280 /   HD   LAND VEHICLES

29  DF  WHEELED {21}
400  DF  .~ Articulated vehicle {30}
423.1  DF  .~.~ Semitrailer {7}
427  DF  .~.~.~ Interrelated operation of coupling, landing gear, and brake {3}
429.~.~.~.~ Landing gear actuated by coupling action {1}
430  DF  .~.~.~.~.~> Longitudinally movable trailer coupling

DEFINITION

Classification: 280/429

(under subclass 427) Devices in which the trailer landing gear is retracted or extended by the action of coupling or uncoupling the tractor and trailer.

SEE OR SEARCH THIS CLASS, SUBCLASS:

431, for an interlock between the coupling and landing gear which prevents uncoupling of the vehicles with the landing gear retracted or prevents retraction of the landing gear until the vehicles are coupled.