US PATENT SUBCLASS 212 / 296
.~.~ Extensible tower of relatively sliding sections

Current as of: June, 1999
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212 /   HD   TRAVERSING HOISTS

294  DF  ADJUSTABLE TO TRANSPORT OR NONUSE POSITION (E.G., COLLAPSIBLE) {4}
295  DF  .~ Crane boom supported by foldable or collapsible tower {2}
296.~.~ Extensible tower of relatively sliding sections

DEFINITION

Classification: 212/296

Extensible tower of relatively sliding sections:

(under subclass 295) Subject matter including a vertically disposed elongated boom* support consisting of telescoping segments whereby the length of the support may be changed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

204, for a vertically extensible boom support by which the boom is supported at different hoisting heights.

348+, for extensible boom or mast structure, per se.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

118, for an elongated member or construction comprised of a plurality of telescoping segments and which is mounted on a base for tilting movement.