US PATENT SUBCLASS 280 / 486
.~.~.~ In line of draft

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

29  DF  WHEELED {21}
400  DF  .~ Articulated vehicle {30}
483  DF  .~.~ Resilient {4}
486.~.~.~ In line of draft {1}
487  DF  .~.~.~.~> To intermediate position

DEFINITION

Classification: 280/486

(under subclass 483) Devices in which the vehicles are connected together by a connection allowing limited relative movement therebetween in the direction of draft and resilient means is provided to resist such movement.

SEE OR SEARCH THIS CLASS, SUBCLASS:

441, for semitrailers having fifth wheel elements which may slide longitudinally, such sliding movement being resisted by springs.