US PATENT SUBCLASS 414 / 531
.~.~.~ With separate means movable vertically between load supporting and retracted positions

Current as of: June, 1999
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414 /   HD   MATERIAL OR ARTICLE HANDLING

467  DF  SELF-LOADING OR UNLOADING VEHICLES {8}
507  DF  .~ Conveyor {12}
529  DF  .~.~ Load-engaging roller or rollerway {4}
531.~.~.~ With separate means movable vertically between load supporting and retracted positions

DEFINITION

Classification: 414/531

With separate means movable vertically between load supporting and retracted positions:

(under subclass 529) Apparatus including separate means which can be either (a) raised into engagement with a load resting on said roller to lift the load off the roller or to stabilize the load without removing it from the roller, or (b) lowered out of engagement with the load so that the latter is supported only by the roller.