These special trolleys permit concentration of loads over four or eight wheels which are as closely coupled as possible and allow full swivel around the shortest of curves.

Certain types of electric hoists are easily adopted to United States Monorail track with a closed coupled trolley mounted on each end to bring the hook up as possible for maximum clearance.

The eight-wheel trolley affords maximum concentration of heavy loads to allow normal hoist operation to within one foot from the end of track or crane.

All the advantages of standard trolleys apply to these close coupled units.