DISPLACEABLE WORKING APPARATUS WITH EXTENSIBLE BOOM

摘要

A displaceable working apparatus provided with a platform having an extensible boom and being displaced on a guide rail is disclosed. The apparatus has a main frame secured to a main support which is movably secured to the guide rail and a main stabilizing mechanism for immovably securing the main frame to the adjacent roof surface. An extensible boom having a working free end which is equipped with a working element and is pivotally secured to a rotating support base positioned under the main frame. The boom is rotatable on the rotating support base and is angularly positionable with respect to the rotating support base. A drive is mounted on the frame to displace the platform along the guide rail.