for operating grab bucket hoists by means of one or more electric motors used both for hosting and lowering the loads and for opening and closing the bucket jaws (other aspects or rope, cable, or chain winding mechanisms specially adapted for actuating grab buckets B66D1/62)

Full Title

Other constructional features or details > Control systems or devices (exclusively for rope, cable, or chain winding mechanisms B66D1/40) > for electric drives (transmitting control pulses B66C13/40; systems or devices of general application H02P) > for operating grab bucket hoists by means of one or more electric motors used both for hosting and lowering the loads and for opening and closing the bucket jaws (other aspects or rope, cable, or chain winding mechanisms specially adapted for actuating grab buckets B66D1/62)

Child Classifications

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• B66C 13/34 through differential or planetary gearing
• B66C 13/36 Single-motor-drive control systems
• B66C 13/38 Systems controlling independent motors