US PATENT SUBCLASS 280 / 433
.~.~.~ Fifth wheel only

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}
433.~.~.~ Fifth wheel only {2}
434  DF  .~.~.~.~> Self-coupling {2}
438.1  DF  .~.~.~.~> Movably mounted {2}

DEFINITION

Classification: 280/433

(under subclass 423.1) Devices directed to the means by which the tractor and semitrailer are releasably and articulatively connected and including no more of the vehicle structure than is necessary to mount the connecting means.

(1) Note. The nominal inclusion of the running gear of the vehicles does not exclude a patent from this or indented

subclasses.