(under subclass 400) Devices in which the draft connection between the articulated vehicles is provided with means for engaging the ground to partially support one of the vehicles when uncoupled from the other vehicle, the support means being movable to a retracted or inoperative position when the vehicles are coupled.
SEE OR SEARCH THIS CLASS, SUBCLASS:
150.5, for vehicles, including trailers, having retractable ground support to support same when not in motion or detached from another vehicle, articulated vehicles not being claimed.
427+, for semitrailer landing gear the operation of which is correlated with the coupling action or trailer brakes.
SEE OR SEARCH CLASS
254, Implements of Apparatus for Applying Pushing or Pulling Force,
418+, for vehicles having retractable ground support means or jacks which are extended by power or force increasing mechanism and wherein no other significant vehicle structure is claimed. The mere mounting of the jack or support on a vehicle tongue is not sufficient to exclude a patent from Class 254.
