US PATENT SUBCLASS 212 / 239
.~.~.~ Flexible cable

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.~.~.~ Flexible cable {2}
240  DF  .~.~.~.~> Having passage for luffing cable through boom supporting member
241  DF  .~.~.~.~> Human or animal powered

DEFINITION

Classification: 212/239

Flexible cable:

(under subclass 237) Apparatus wherein the means for swinging the boom* vertically includes a greatly elongated strand of flaccid material.