Telescopic coupling between car and trailer uses valve to control fluid flow into piston chamber, valve support being integral with secondary piston coupled with main piston while flap is integral with rod fixed on trailer's frame

摘要

Valve (5) controls the inlet and outlet of the fluid into the chamber (10) of the main piston (1). The flap (6) of the valve is mobile as is the its support (7). The support is integral with the piston (8) which is coupled with the main piston and is mounted on the vehicle's frame (3). The flap is integral with a rod (12) fixed on the trailer's frame (4).