Device for maintaining a tool attachment in a knuckle boom crane

Device for placing a tower crane in weathervaning mode

Device for raising and unfolding the mast and for raising...

Device for removing coke oven chamber door

Device for simultaneously unfolding or folding crane jib tip...

Device for slewing the column of a crane

Device for stopping the swinging movement of a load hung by a cr

Device for suspending a travel rail of an overhead conveyor...

Device for the purpose of preventing a body depending from ropes

Device for use in welding reinforcement members to panel plates

Device in extendible crane booms

Device of the kind comprising at least three movably co-ordinate

Device on hoisting machinery for automatic control of the moveme

Devices for erecting a building from prefabricated sections

Devices for transferring heavy loads at sea

Diagnostic readout for operation of a crane

Directional control system for a gantry type crane

Directional indicating device for detecting improper orientation

Dismounting device for heavy load hoisting member

Displacement apparatus