US PATENT SUBCLASS 52 / 120
.~.~.~ Gin pole hoist

Current as of: June, 1999
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52 /   HD   STATIC STRUCTURES (E.G., BUILDINGS)

111  DF  MECHANISM OPERATED RELATIVELY MOVABLE SHAFT ASSEMBLY {6}
116  DF  .~ Tilts relative to base {1}
117  DF  .~.~ Relatively moving sections {3}
120.~.~.~ Gin pole hoist

DEFINITION

Classification: 52/120

(under subclass 117) Structure including a cable passing over a drum or pulley mounted on a vertical member acting to elevate the shaft or shaft section.

SEE OR SEARCH THIS CLASS, SUBCLASS:

121, for a cable hoist to extend a non- tilting sectional mast.

SEE OR SEARCH CLASS

212, Traversing Hoists,

239+, and 262 for a vertically swinging crane boom actuated by a flexible cable.