US Patent Class 212-- TRAVERSING HOISTS-- MAIN HEADINGS

US Patent Class 212
TRAVERSING HOISTS-- Main Headings

		CLASS NOTES
272	DF	HAVING MEANS TO PREVENT OR DAMPEN LOAD OSCILLATIONS {1}
276	DF	HAVING RANDOM CONDITION SENSOR COMBINED WITH AN INDICATOR OR ALARM OR CONTROLLING MEANS OR DISABLING MEANS {5}
282	DF	WITH MECHANICAL INDICATOR {1}
284	DF	WITH MOTOR CONTROL {4}
291	DF	HAVING OPERATOR SUPPORT OR CAB
292	DF	BOOM POSITION LOCK
293	DF	HAVING SNUBBER OR BOOM BACKSWING STOP
166	DF	CLOSURE REMOVER
167	DF	WITH HAUL-IN LINE
168	DF	WITH MEANS TO PROJECT LOAD ENGAGER BEYOND END OF BOOM
169	DF	GROUND WHEEL OPERATED
170	DF	HAVING CLUTCH OR VARIABLE SPEED TRANSMISSION {4}
175	DF	HAVING MEANS FACILITATING ASSEMBLY OR DISASSEMBLY {4}
294	DF	ADJUSTABLE TO TRANSPORT OR NONUSE POSITION (E.G., COLLAPSIBLE) {4}
307	DF	SHIP MOUNTED OR FLOATING (E.G., A CRANE FIXED TO A PLATFORM ADAPTED TO FLOAT) {2}
195	DF	HAVING COUNTERWEIGHT OR COUNTERBALANCING MEANS {1}
199	DF	HAVING BOOM SHIFTABLE VERTICALLY ALONG A LINEAR PATH {5}
312	DF	TRAVELING BRIDGE {13}
223	DF	HAVING HORIZONTALLY SWINGING BOOM OR BRIDGE {9}
255	DF	HAVING VERTICALLY SWINGING BOOM {6}
71	DF	OVERHEAD {7}
347	DF	BOOM OR MAST {1}
270	DF	METHODS
271	DF	MISCELLANEOUS
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901	DF	DOLLEY-TYPE CRANES