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Class Information
Number: 212/39A
Name: Traversing hoists >

Sub-classes under this class:

Class Number Class Name Patents
212/166 Closure remover 45
212/167 With haul-in line 20
212/168 With means to project load engager beyond end of boom 25
212/169 Ground wheel operated 0
212/170 Having clutch or variable speed transmission 3
212/175 Having means facilitating assembly or disassembly 83
212/195 Having counterweight or counterbalancing means 118
212/199 Having boom shiftable vertically along a linear path 15
212/223 Having horizontally swinging boom or bridge 32
212/255 Having vertically swinging boom 33
212/270 Methods 143
212/271 Miscellaneous 54
212/272 Having means to prevent or dampen load oscillations 55
212/276 Having random condition sensor combined with an indicator or alarm or controlling means or disabling means 116
212/282 With mechanical indicator 20
212/284 With motor control 40
212/291 Having operator support or cab 44
212/292 Boom position lock 83
212/293 Having snubber or boom backswing stop 15
212/294 Adjustable to transport or nonuse position (e.g., collapsible) 84
212/307 Ship mounted or floating (e.g., a crane fixed to a platform adapted to float) 57
212/312 Traveling bridge 81
212/347 Boom or mast 95
212/71 Overhead 30
212/901 Dolley-type cranes 66

Patents under this class:

Patent Number Title Of Patent Date Issued

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