Pivoted arm for lowering under a slab

摘要

An instrument (1) is lowered into a tank with a narrow opening (4) guided by an articulated arm (11) mounted on a mobile trolley on the periphery of the opening. The rotation of the arm consecutive to this movement and the pivoting of the lower section (13) around the articulation (14) place the instrument (1) vertically above the required place, by means of a simple control if expressed in polar co-ordinates. Application to taking samples and inspections in tanks containing dangerous waste.