US PATENT SUBCLASS 212 / 246
.~.~ Including flexible member driving gear or pulley having axis collinear with boom pivot

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

223  DF  HAVING HORIZONTALLY SWINGING BOOM OR BRIDGE {9}
245  DF  .~ And means to swing boom horizontally {3}
246.~.~ Including flexible member driving gear or pulley having axis collinear with boom pivot

DEFINITION

Classification: 212/246

Including flexible member driving gear or pulley having axis collinear with boom pivot:

(under subclass 245) Apparatus including a member of flaccid material which partially encircles a disc or annular member having an axis of rotation on a vertical line defining the axis about which the boom* swings, and means are provided to engage and drive the endless or elongated member whereby the boom is swung horizontally about said axis.