US PATENT SUBCLASS 52 / 117
.~.~ Relatively moving sections

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.~.~ Relatively moving sections {3}
118  DF  .~.~.~> Telescoping
119  DF  .~.~.~> Lifting arm directly engages tower
120  DF  .~.~.~> Gin pole hoist

DEFINITION

Classification: 52/117

(under subclass 116) Structure wherein the shaft is divided into multiple discrete sections which may change their position with respect to each other.