Adjustable position load supporting arm, load suspending device

A load suspending device comprising:

• at least one articulated arm having a first arm arranged so as to be rotatingly mobile according to a rotational movement (F1) in a first plane, and
• a load supporting arm comprising a framework having on the whole the shape of a deformable parallelogram provided with at least a fixed link, a mobile link, a first and a second mobile connecting rod and a free end able to support a load, a jack comprising a body and a piston one of which is coupled with the fixed link, the other of which is coupled with at least one of the first and second connecting rods, said jack being able to actuate said first and second connecting rods with respect to said fixed link so as to deform said deformable parallelogram, said jack being of the adjustable-pressure type so that the pressure inside said jack is adjustable according to the weight of said load supported by said supporting arm, wherein said mobile link is mounted to said supporting arm only at said free end whereas said fixed link is mounted to said supporting arm only at the an end of said supporting arm opposite said free end of said supporting arm formed by said first and second mobile connecting rods and wherein said supporting arm further comprises, at said free end, a connecting piece able to support said load and to be firmly connected to (i) said mobile link in a first configuration, so as to have an axis of orientation (A) that is fixed with respect to said fixed link and variable with respect to said first and second connecting rods when said supporting arm shifts position, and (ii) at least one of said first and second connecting rods in a second configuration, so as to have an axis of orientation (B) that is variable with respect to said fixed link and fixed with respect to said first and second connecting rods when said supporting arm shifts position,
• said load supporting arm being connected to said first arm by means a pivot joint arranged so as to rotate according to a rotational movement (F2) in a second plane distinct from said first plane.