TRUCK-TRAILER COMBINATION EMERGENCY VALVE MECHANISM WITH AN ELASTIC DIAPHRAGM

Valve member 1 is linked by its stem to diaphragm 2 which is held down by spring 3 to the valve housing. Spring 4 tends to lift diaphragm 2 and valve member 1 to their upper position. The upper and lower guides of valve member 1 have orifices through which air can pass. Compressed air from the tank of the truck is delivered under diaphragm 2. Compressed air from the brake valve is delivered to the…