US PATENT SUBCLASS 280 / 507
.~.~.~ Protector or lock

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

29  DF  WHEELED {21}
400  DF  .~ Articulated vehicle {30}
504  DF  .~.~ Coupling {7}
507.~.~.~ Protector or lock

DEFINITION

Classification: 280/507

(under subclass 504) Devices in which means are provided to prevent damage or access to the coupling parts, particularly when in uncoupled relation, or in which means are provided to lock the coupling parts together to prevent unauthorized disconnection.