US Patent Class 212
TRAVERSING HOISTS-- Main Headings




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Current as of: June, 1999
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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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CROSS-REFERENCE ART COLLECTION
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901  DF  DOLLEY-TYPE CRANES