Hoisting and handling device having weighing means

Claim 1

A hoisting and handling device comprising a support frame, an intermediate unit mounted in the support frame to rotate about a first axis, a load hooking means carried by the intermediate unit, said intermediate unit having an element defining a cylinder, a cover fixed at the upper part of said element and a stepped piston mounted in the cylinder and defining therewith a sealed annular chamber, an incompressible fluid filling the chamber and means for measuring pressure connected to the chamber, said pressure representing the load carried by the hooking means, said hooking means having a stem extending through the intermediate unit and mounted to rotate therein about a second axis perpendicular to said first axis, a member supported at the upper end of the stem and a rolling thrust bearing interposed between the piston and said member, said cover enclosing said member and said thrust bearing, abutment means being provided on the intermediate unit and cooperating with the upper face of the piston for limiting the upward movement of the piston in the cylinder, with interposition of an elastically yieldable shock-absorbing means between said abutment means and the upper face of the piston.