Abstract: A method and apparatus for regulating a load compensator device for a handling gear. The load compensation device includes: a stationary internal bell housing; a mobile external bell housing which is secured at one of the ends of a handling member, from the other end of which the load is hung; and an overload pneumatic cylinder and an underload pneumatic cylinder connected to a pressure source and/or exhausted by a series of electric directional control valves. The pressure is controlled within the cylinders continuously to alter the datum position of the external bell housing that corresponds to the state of equilibrium, function of the variations in pressure which are measured at the cylinders. Changes in pressure cancels out any overload or underload effect on the load and returns the load compensator to its state of equilibrium that corresponds to the handling gear in its initial state of equilibrium.

Abstract: This invention relates to a load compensating device of the type comprising a detector adapted to stop displacement of the load in the event of said load encountering an obstacle and the reaction of this load thereon varying more or less with respect to a threshold, wherein it comprises:--a fixed armature comprising two end stops;--a sliding block adapted to slide in the armature between its end stops;--an outer bell element provided with means adapted to cooperate with the sliding block;--an overload jack disposed between the sliding block and the armature;--an underload jack housed between the sliding block and the outer bell element;--a counterweight to which the cable for handling the load is attached and axially mobile between two limits with respect to the outer bell element;--and an electro-pneumatic circuit for modulated supply of the jacks as a function of the variations in the load.