Abstract: A vehicle mounted aerial tower in which a primary fixed length boom is mounted pivotably from one end and extends longitudinally outwardly of the vehicle, being elevated about the pivot by a lift cylinder which is connected to the vehicle and to the boom and having mounted pivotally from the outer end of the boom a carriage assembly which supports a secondary elongated boom for pivotal movement with the carriage and actuatable lengthwise of the primary boom by sprocket and chain means, or the like, and a personnel work platform or cab pivotally supported from the outer end of the secondary boom and adapted to be maintained in a predetermined position relative to vehicle ground support.

Abstract: An extensible reach load lifting mechanism for a truck or similar vehicle in which a first boom assembly is mounted pivotably from the rear portion of the vehicle and extends lengthwise thereof having a hydraulic cylinder actuator for raising and lowering the boom about the pivot connection, the boom also forming a trackway. A trolley assembly is mounted in the trackway of the boom and a drive mechanism actuates selectively the trolley longitudinally of the boom, a second boom assembly which extends lengthwise of the first boom being pivotably mounted from the trolley for raising and lowering movement about the trolley pivot by a second hydraulic cylinder actuator, and for actuation lengthwise of the first boom on the trolley assembly at any position of elevation of the first boom.