US PATENT SUBCLASS 212 / 274
.~.~ By triangulation of load cables

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

272  DF  HAVING MEANS TO PREVENT OR DAMPEN LOAD OSCILLATIONS {1}
273  DF  .~ Antisway (i.e., horizontal movements) {2}
274.~.~ By triangulation of load cables

DEFINITION

Classification: 212/274

By triangulation of load cables:

(under subclass 273) Subject matter wherein the arresting or movement reducing means comprise at least two load lifting cables or cable portions arranged to diverge or converge at the load.

SEE OR SEARCH THIS CLASS, SUBCLASS:

167, for an in-haul line extending to the load.

236, and 310, for cables extending to the boom tip for luffing and slewing.