Travelling gear incorporated in or fitted to trolleys or cranes (; for dredgers E02F)

Child Classifications

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• B66C 9/02 for underhung trolleys or cranes
• B66C 9/04 to facilitate negotiation of curves
• B66C 9/06 for more than one rail gauge
• B66C 9/08 Runners; Runner bearings (wheels for railbound vehicles B60B)
• B66C 9/10 Undercarriages or bogies, e.g. end carriages, end bogies
• B66C 9/14 Trolley or crane travel drives (rope, cable, or chain drives for loads or trolleys B66C11/16; control B66C13/18)
• B66C 9/16 with means for maintaining alignment between wheels and track
• B66C 9/18 with means for locking trolleys or cranes to runways or tracks to prevent inadvertent movements