Patent ID: 6176192
Filing Date: 2001-01-23
Classification: B63B,E01D,F15B

Abstract:
A device for adjusting ramps, in which a bridge support and the ramps forming a connection to a bank are connected to one another pivotably via a pivot point, comprisingdouble-acting hydraulic cylinders arranged in the area of the pivot point for adjusting the ramp incline, piston surfaces of the hydraulic cylinders being impinged upon with a pressure that adjusts itself in accordance with respective loading of the ramp,a safety valve which limits loading-dependent pressure corresponding to bending moment in the connecting area of the ramp to the bridge support, whereinthe safety valve (13) is arranged in a line (12) connecting two cylinder chambers (10b, 10s) directly to one another, anda volume equalization container (15; 22, 23) is connected to a low-pressure side of the safety valve (13).