US PATENT SUBCLASS 280 / 423.1
.~.~ Semitrailer

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

29  DF  WHEELED {21}
400  DF  .~ Articulated vehicle {30}
423.1.~.~ Semitrailer {7}
424  DF  .~.~.~> Passenger carrying type
425.1  DF  .~.~.~> Coupling and uncoupling with facilitating lift means {1}
426  DF  .~.~.~> Steering by articulative movement
427  DF  .~.~.~> Interrelated operation of coupling, landing gear, and brake {3}
432  DF  .~.~.~> Safety devices
433  DF  .~.~.~> Fifth wheel only {2}
441.2  DF  .~.~.~> Detachable or shiftable gooseneck type

DEFINITION

Classification: 280/423.1

Semitrailer:

(under subclass 400) Vehicles in which there is provided a tractor capable of independent use and an unbalanced trailing vehicle having running gear at the rear end thereof, the forward end of the trailer being supported on the back of the tractor at or forward of the rear axle of the tractor by an articulated connection or fifth wheel which connection transmits all of the draft.

SEE OR SEARCH THIS CLASS, SUBCLASS:

476.1, for wheeled dollies between the tractor and trailer.

763.1, for semitrailer landing gear.

SEE OR SEARCH CLASS

254, Implements or Apparatus for Applying Pushing or Pulling Force,

418+, for semitrailers having retractable ground supports or jacks which are extended by power or force increasing mechanism to raise and support the forward end of the semitrailer when detached from the tractor and wherein no other significant vehicle structure is claimed. The inclusion of coupling or brake means, for example, is considered to be significant vehicle structure.