US PATENT SUBCLASS 212 / 295
.~ Crane boom supported by foldable or collapsible tower

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.~ Crane boom supported by foldable or collapsible tower {2}
296  DF  .~.~> Extensible tower of relatively sliding sections
297  DF  .~.~> Hydraulically pivoted tower or tower sections

DEFINITION

Classification: 212/295

Crane boom supported by foldable or collapsible tower:

(under subclass 294) Subject matter including a boom*

supported in operative position by a vertically disposed elongated member and means are provided whereby either the orientation or a dimension of the vertically extending member may be changed to render the apparatus more easily transportable or storable.

(1) Note. The member (tower) must remain vertical during load-handling operations to be considered as a boom support as defined above.

SEE OR SEARCH CLASS

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

111+, for an elongated member or construction at least part of which is movable relative to another part or a base, and motive means to effect such movement.