Patent ID: 6786509
Filing Date: 2004-09-07
Classification: B60G

Abstract:
A vehicle suspension assembly, comprising:a first support member attachable to a body of the vehicle; a second support member that moves relative to the first support member; at least one air spring coupled with the first and second support members; a height holding device at least partially within the air spring and supported on one of the first and second support members, the height holding device having a moveable portion that is moveable from a first retracted position where the moveable portion permits relative movement between the first and second support members into a second extended position where the moveable portion maintains a desired spacing between the first and second support members; a biasing member that biases the moveable portion into the first retracted position; a hydraulic ram that moves the moveable portion against the bias of the biasing member, the moveable portion comprising a piston portion of the hydraulic ram; and an inlet port associated with the hydraulic ram that selectively locks the hydraulic ram such that pressure within the hydraulic ram provides the only maintaining force to maintain the moveable portion in the second extended position.