Both primary and secondary circuits of the brake valve use a common exhaust protected by an exhaust diaphragm.OPERATION APPLYING: NORMAL OPERATION - PRIMARY CIRCUIT PORTION When the brake treadle is depressed, the plunger exerts force on the spring seat, graduating spring, and primary piston. The ...
The shifter rod 116 is shown rigidly secured, by a cross-bar or the like 120, to a piston rod 122 carried by a double-acting piston 124 in a power cylinder 126 mounted on the, gear-box 84. The piston rod 122 is hollow, and contains a slide valve 128 controlling a passage 130 open...
second valve262. For example, the second actuatable brakes222actuate based on the higher of the pneumatic pressures at the delivery ports441,2. In another embodiment, another valve (e.g., a double-check valve) (not shown) arbitrates between the pneumatic pressure at the delivery port441and ...
double pole, single throw unit which is actuated by the failure sensor. Solenoid 84 operates the valve 51 which is in the supply line to the box marked actuator and designated 100. This box represents the remainder of the hydraulic system of FIG. 1 and it is connected to a load 101. A...