US PATENT SUBCLASS 187 / 341
.~.~ Shifted by drive-means powered by load support motion

Current as of: June, 1999
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187 /   HD   ELEVATOR, INDUSTRIAL LIFT TRUCK, OR STATIONARY LIFT FOR VEHICLE

336  DF  WITH CLOSURE MEANS FOR SHAFT OPENING THROUGH LANDING {3}
340  DF  .~ Including transversely sliding closure {1}
341.~.~ Shifted by drive-means powered by load support motion

DEFINITION

Classification: 187/341

Shifted by drive means powered by load support motion:

(under subclass 340) Passageway covering means wherein the reciprocating covering structure is moved by drive-means* powered by contact with a moving load-underlying support surface, or structure attached to the load-underlying support surface, of an elevator.

(1) Note. Means located on and traveling with the load-underlying support surface which is intended to impact directly against the passageway covering means is not considered a drive-means* proper for this subclass and is found in subclass 340.