US PATENT SUBCLASS 212 / 298
.~ Collapsible inverted "V" frame supports boom rigging


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

294  DF  ADJUSTABLE TO TRANSPORT OR NONUSE POSITION (E.G., COLLAPSIBLE) {4}
298.~ Collapsible inverted "V" frame supports boom rigging


DEFINITION

Classification: 212/298

Collapsible inverted "V" frame supports boom rigging:

(under subclass 294) Subject matter including a boom* and a system of cables or the like to raise and lower the boom, wherein the cables are in turn supported by or guided over a member in the shape of a vertical inverted "V", which is mounted on a base by means which permit the "V" to be pivoted substantially parallel to the boom.