driven by the motor of the vehicle or another motor on the vehicle

Full Title

Ladders characterised by being mounted on undercarriages or vehicles Securing ladders on vehicles (ladders having wheels, rollers, or runners E06C1/397 ) > with rigid longitudinal members > capable of being elevated or extended > by piston and cylinder, or equivalent means, operated by a pressure medium > derived directly from a pump or compressor > driven by the motor of the vehicle or another motor on the vehicle