Abstract: A boom hoist system for supporting and adjusting the position of a lifting crane gantry is provided including a drum, a drive system, and first and second braking systems for selectively stopping rotation of the drum. The boom hoist system operates independently from crane mechanical works and the first and second braking systems may include sensors for automatically engaging when specified conditions occur in order to prevent a hoisted gantry from falling uncontrollably in the event of a hoist system malfunction or failure.

Abstract: An electric vehicle includes a chassis supported by three wheels. A seat is carried by the chassis, and the seat is enclosed in a compartment formed by a pivotable canopy. A pair of push-pull steering levers are positioned laterally of the seat to avoid obstructing forward access to the seat. There is an open space through the floor of the vehicle in front of the seat, which allows the occupant to enter and exit from the seat without climbing up into the vehicle. The canopy has a nose portion with a footrest panel that is inclined inwardly toward the occupant in the seat. This arrangement permits the vehicle to be used even by persons with limited mobility, who may have difficulty entering and leaving other vehicles.