Abstract: A replacement rear door for a van comprising in combination an interior front panel, an exterior rear panel with exterior peripheral panels defining an internal equipment storage zone; an air conditioning system housed entirely within the equipment storage zone for cooling the warm air generated in the passenger section of the van; a gasoline powered internal combustion engine for generating the power to operate the air conditioning system; gasoline connection means adapted to be coupled into the main gasoline supply line for supplying fuel to the engine; electric connection means adapted to couple the main battery of the van to the peripheral equipment of the engine; electronic means for controlling the stopping and starting of the air conditioning system; and hinge means extending outwardly from one of the exterior side panels for mating with the body hinges on the van.

Abstract: A suspended cradle for use in the inspection and maintenance of difficulty accessible structures comprises a frame provided with a series of at least three roller assemblies each having rollers for running on an overhead track on the structure to be inspected or maintained and thereby suspending the frame for movement along the track. Each roller assembly has means for rendering the roller assembly inoperative by relieving the load on the rollers and withdrawing the rollers from the track so that the inoperative roller assembly can move past an obstruction on the track while the frame remains movably supported on the track by the remaining roller assemblies.