Patent ID: 6752066
Filing Date: 2004-06-22
Classification: B25B,F15B

Abstract:
A device for controlling the oscillation of the arm of a handling equipment of the swingable lever type, in which the equipment comprises a driving double acting cylinder having a chamber in which a main piston is sealingly mounted, which is slidable as a result of the selective delivery of fluid under pressure at opposite zones of the chamber of the cylinder, the main piston being connected to a rod having a driving end which projects from the cylinder and is connected to said arm by a toggle joint, wherein said device comprises:an axial cavity formed in the rod, in which a nut screw is arranged, a screw member comprising a threaded shank so arranged as to engage the nut screw of the rod, and a head portion opposite to the rod and mounted rotatably but not axially slidable with respect to the cylinder, and control means for controlling the rotating movement of the screw member, which are associated to the head portion of the screw member and are adapted to perform a braking action of its rotation when an anomalous condition occurs in the feeding of the fluid under pressure to the chamber of the cylinder.