Leveling aerial device - motor vehicle assembly

Abstract From the Canadian patent

An aerial device - motor vehicle fire, fighting assembly in which a movable frame carrying an aerial device is connected between the fifth wheel of the tractor vehicle and the forward end of the fixed frame of the trailer vehicle. The connection between the movable and fixed frames is pivotal about a transverse horizontal axis under the control of hydraulic piston and cylinder units. The units effect relative pivotal movements between the movable and fixed frames and fixedly retain the same together into different positions of pivotal movement including (1) a transporting position wherein the movable frame constitutes a rigid forward extension Or the fixed rearward frame enabling the entire …