US PATENT SUBCLASS 280 / 436
.~.~.~.~.~.~ Urged to retaining position by draft

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  DF  .~.~.~ Fifth wheel only {2}
434  DF  .~.~.~.~ Self-coupling {2}
435  DF  .~.~.~.~.~ Double pivoted jaws {1}
436.~.~.~.~.~.~ Urged to retaining position by draft

DEFINITION

Classification: 280/436

(under subclass 435) Devices in which the pivotal axes for the pivoted jaws are so located that the draft applied to the jaws by the complementary coupling member biases the jaws to a closed position.