Patent ID: 8579384

Claim:
A valve arrangement comprising: a housing; a first valve within the housing, the first valve adapted to deliver a first control signal; a second valve within the housing, the second valve adapted to deliver a pneumatic signal upon receiving the first control signal from the first valve, the second valve in communication with a vehicle service brake assembly; the vehicle service brake assembly adapted to apply as a result of the second valve delivering the pneumatic signal; wherein the second valve continues to deliver the pneumatic signal when the first control signal is discontinued; a second housing; a third valve adapted to deliver a pneumatic control signal upon receiving an electronic signal; a fourth valve adapted to deliver a pneumatic control signal upon receiving an electronic signal wherein the fourth valve communicates with the second valve and the second valve discontinues delivering the pneumatic signal upon receiving the pneumatic control signal delivered by the fourth valve; and a fifth valve in communication with a vehicle spring applied parking brake assembly, the third valve and the fourth valve; the fifth valve adapted to open upon receiving the pneumatic control signal from the fourth valve and close upon receiving the pneumatic control signal from the third valve, wherein the fifth valve delivers a pneumatic signal when open; the spring applied parking brakes adapted to release as a result of the pneumatic signal delivered by the fifth valve.