US PATENT SUBCLASS 182 / 2.3
.~ Swingable support

Current as of: June, 1999
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182 /   HD   FIRE ESCAPE, LADDER, OR SCAFFOLD

2.1  DF  MEANS MAINTAINING PLATFORM LEVEL ON ANGULARLY MOVABLE SUPPORT {2}
2.3.~ Swingable support {6}
2.4  DF  .~.~> Of dielectric material
2.5  DF  .~.~> Ladder associated
2.6  DF  .~.~> Providing access to underside of elevated surface
2.7  DF  .~.~> Parallelogram linkage
2.8  DF  .~.~> Foldable hinged support {1}
2.11  DF  .~.~> Telescopic support

DEFINITION

Classification: 182/2.3

Swingable support:

(under subclass 2.1) Device comprising a boom section pivotally connected at its lower end to a supporting base for pivotal movement in a vertical plane.

SEE OR SEARCH CLASS

212, Traversing Hoists,

255+, for a traversing derrick having a vertically swinging hoist frame.

414, Material or Article Handling,

706+, for vertically swinging load supports of the tilting shovel or fork type having means to maintain the shovel or fork level during the swinging.