66691 ⎘
Construction arrangement, or operation of valves incorporated in power brake systems and not covered by groups or; Application and release valves; Triple or other relay valves which allow step-wise application or release and which are actuated by brake-pipe pressure variation to connect brake cylinders or equivalent to compressed air or vacuum source or atmosphere controlled by two fluid pressures with one or more auxiliary valves, for braking, releasing, filling reservoirs Trailer brake valves
Vehicle braking system
#2Hydraulic arrangement for tractor-trailer brake hydraulic circuits
#3Valve system and method for controlling same
#4Control apparatus for controlling a brake of a unit hauled by a vehicle