Patent ID: 9517674
Filing Date: 2016-12-13
CPC Classification: B60G

Claim Text:
1. A pneumatic control system for a heavy-duty vehicle comprising: a) an air supply; b) a height control valve in fluid communication with said air supply and at least one air spring; c) an air lock valve in fluid communication with said height control valve and said at least one air spring, said air lock valve being in fluid communication with a blank cavity, the air lock valve having an “air lock off” position and an “air lock on” position; d) whereby, when said air lock valve is in said “air lock off” position, fluid flow is established between the height control valve, the air lock valve and the at least one air spring, and when the air lock valve is in said “air lock on” position, fluid flow is established between said at least one air spring, said air lock valve and said blank cavity, and fluid flow is prevented between said height control valve, the air lock valve and the at least one air spring.