US PATENT SUBCLASS 212 / 245
.~ And means to swing boom horizontally

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

223  DF  HAVING HORIZONTALLY SWINGING BOOM OR BRIDGE {9}
245.~ And means to swing boom horizontally {3}
246  DF  .~.~> Including flexible member driving gear or pulley having axis collinear with boom pivot
247  DF  .~.~> Gear drive {1}
249  DF  .~.~> Human or animal powered

DEFINITION

Classification: 212/245

And means to swing boom horizontally:

(under subclass 223) Apparatus including a motor, power transmission, or force multiplying linkage to move the boom* about a vertical axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

276+, for a motor for swinging a boom horizontally and which is activated or regulated in response to a sensed random condition.

280, for a motor for swinging a boom horizontally which is stopped or disable in response to a sensed random condition.

284+, for means, such as a switch or valve, for manually or cyclically controlling the flow of energy to a sluing motor.

SEE OR SEARCH CLASS

52, Static Structures (e.g., Buildings),

114, for miscellaneous elongated members which are moved about an axis normal to a supporting base by mechanical motive means. A horizontally rotatable boom is classified in Class 212 when disclosed as traversing hoist structure.