David W Marlow, 43Milford, OH

6089551, Jul 18, 2000

Feb 10, 1998

9/021464

Robin Lee Haviland - West Chester OH
David Lee Marlow - Brookville OH

Crowe Manufacturing Services, Inc. - Dayton OH

B60G 1700

267 6416

A height control valve including a leveling valve integral with a dump valve for controlling air flow to and from an air spring supporting a vehicle frame above an axle is disclosed. The height control valve includes a valve body defining first and second internal chambers. The leveling valve is defined by a leveling seal assembly received within the first internal chamber. The leveling seal assembly controls fluid flow into the first internal chamber through an intake port and fluid flow out of the first internal chamber through an exhaust port. The leveling seal assembly includes a rocker arm alternatively engagable with intake and exhaust pins which are adapted for sealingly engaging the intake and exhaust ports, respectively. Pivoting movement of the rocker arm results in one of the intake and exhaust pins being forced away from the respective intake or exhaust port resulting in fluid flow therethrough. The dump valve includes a dump seal assembly received within the second internal chamber and selectively moveable between a normal operating position and a dump position by an actuator.