Patent attributes
An improved valve for use in a heavy vehicle pneumatic braking and parking system is disclosed. The valve includes a solenoid coil assembly, a valve seat, an armature, and a spring. The solenoid coil includes a pole piece and produces a magnetic field when energized. The valve seat has a valve seat surface and defines a flow passage. The armature has a first end and a second end and includes a spherical shaped elastomeric seal sized to engage the valve seat to block air flow through the flow passage. The spring is engaged around an exterior of the armature and resiliently biases the armature toward the valve seat. When energized, the solenoid coil displaces the armature to an open position away from the valve seat and toward the pole piece to allow air flow through the flow passage.
