US PATENT SUBCLASS 212 / 260-- .~ Having means to swing boom vertically

US PATENT SUBCLASS 212 / 260
.~ Having means to swing boom vertically

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

255	DF	HAVING VERTICALLY SWINGING BOOM {6}
260		.~ Having means to swing boom vertically {2}
261	DF	.~.~> Fluid actuated ram
262	DF	.~.~> Flexible cable {1}

DEFINITION

Classification: 212/260

Having means to swing boom vertically:

(under subclass 255) 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:

237+, for a horizontally and vertically swinging boom and including means to swing the boom vertically.

SEE OR SEARCH CLASS

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

116+, for an elongated member tiltable relative to supporting base and mechanical motive means for applying power to effect such movement.