Armored vehicle door hatch movement device, using controlled operation of hydraulic drive for opening and closing movements of door hatch

摘要

The movement device uses a respective hydraulic drive (12) for movement of each door hatch between its open and closed positions under control of a valve control unit (14), connecting it to a hydraulic pressure source (P) via a supply network (16) having a fluid supply line (18,20) for each movement direction. Each fluid supply line contains 2 series valves (22,26; 24,28), a control (30,32) connecting the second valve in each supply line to the intermediate node between the valves in the other supply line.