US PATENT SUBCLASS 52 / 119
.~.~.~ Lifting arm directly engages tower

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}
119.~.~.~ Lifting arm directly engages tower

DEFINITION

Classification: 52/119

(under subclass 117) Structure including a rigid member extending between the shaft and base and connected to one and slidably contacting the other, acting to elevate the shaft.