US PATENT SUBCLASS 198 / 328
.~.~ Trained about vertical axis or axes

Current as of: June, 1999
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198 /   HD   CONVEYORS: POWER-DRIVEN

321  DF  CONVEYOR OR ACCESSORY THEREFOR SPECIALIZED TO CONVEY PEOPLE {5}
326  DF  .~ By stairway having steps forming an endless member {6}
328.~.~ Trained about vertical axis or axes

DEFINITION

Classification: 198/328

(under subclass 326) Device wherein the endless member includes a plurality of articulated steps which are arranged to bend about an axis which is generally normal to the horizontal.

(1) Note. Moving stairways having side-by-side ascending and descending flights formed from the same endless member will be found herein.