US PATENT SUBCLASS 212 / 237-- .~.~ Including means to swing boom vertically

US PATENT SUBCLASS 212 / 237
.~.~ Including means to swing boom vertically

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		.~.~ Including means to swing boom vertically {2}
238	DF	.~.~.~> Fluid actuated ram
239	DF	.~.~.~> Flexible cable {2}

DEFINITION

Classification: 212/237

Including means to swing boom vertically:

(under subclass 232) Apparatus including a motor, power transmission, or a force multiplying linkage for swinging the boom* about a horizontal axis.

SEE OR SEARCH THIS CLASS, SUBCLASS:

260, for means to swing a boom vertically, with no horizontal swinging claimed.

SEE OR SEARCH CLASS

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

116+, for an elongated rigid member movable relative to a supporting base and mechanical motive means for applying

power to affect such movement.