US PATENT SUBCLASS 211 / 209
.~.~ By hoist or pulley

Current as of: June, 1999
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211 /   HD   SUPPORTS: RACKS

175  DF  ADJUSTABLE {1}
207  DF  .~ Vertically {2}
209.~.~ By hoist or pulley

DEFINITION

Classification: 211/209

(under subclass 207) Device wherein repositioning means includes a mechanical-advantage linkage or movement-converting system by which the article-supporting element is raised or lowered.

(1) Note. Included in this subclass is a device using a hoist comprising a screw and nut arrangement wherein relative rotation of the elements produces a relative axial travel of the elements, and a device using a hoist comprising a cable trained over a pulley (or a plurality of pulleys).