US PATENT SUBCLASS 212 / 240
.~.~.~.~ Having passage for luffing cable through boom supporting member

Current as of: June, 1999
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212 /   HD   TRAVERSING HOISTS

223  DF  HAVING HORIZONTALLY SWINGING BOOM OR BRIDGE {9}
232  DF  .~ And vertically swinging {6}
237  DF  .~.~ Including means to swing boom vertically {2}
239  DF  .~.~.~ Flexible cable {2}
240.~.~.~.~ Having passage for luffing cable through boom supporting member

DEFINITION

Classification: 212/240

Having passage for luffing cable through boom supporting member:

(under subclass 239) Apparatus wherein the support on which the boom* is swingably mounted is provided with a passageway through which the strand passes to swing the boom vertically.

SEE OR SEARCH THIS CLASS, SUBCLASS:

252, for a boom support having a passage for a hoist cable.

SEE OR SEARCH CLASS

254, Implements or Apparatus for Applying Pushing or Pulling Force,

389+, for hoisting cable guides.