Bridging platform for railway track rails - has vertical slide carriage with hydraulic rams with interacting pressure medical flow

摘要

The bridging platform folds up vertically behind the rails in the rest position and swings down flat for use so that its free end rests on the rails. The plate pivot point rides up and down on the upright boom of a carriage, which rides parallel behind the rails so that the plate pivot point descends for the active setting. The plate is underpinned at spacing from its pivot by a hydraulic rams, as in 4032892. The pressure medium forced out of the extending ram (20, 21) is fed to the other, retraction ram, with the second ram medium following through a choke. ADVANTAGE - Improved hydraulic operation for the platform working and rest positions.