B - Operations – Transporting – 60 – G
Patent
B - Operations, Transporting
60
G
B60G 17/056 (2006.01) B60G 17/052 (2006.01)
Patent
CA 2070443
LEVELING VALVE FOR AIR SPRINGS ABSTRACT OF THE DISCLOSURE A leveling valve for controlling the amount of air within an air spring mounted between two spaced members subject to changes in the distance between them, the use of such leveling valve being primarily in maintaining a constant level of a vehicle chassis or frame relative to its axles in response to the loading and unloading of the vehicle. The valve provides for an elongated body in which an actuating mechanism is mounted at one end and a valve means at the other end with a dampener and a pilot-operated dump means located between the actuating mechanism and the valve means. An elongated plunger extends from the actuating means to the valve means through the dampener and the pilot-operated dump means. One end of the plunger is attached to the actuating mechanism which includes a sleeve slidable on the plunger and on each side of which is located coil springs for maintaining the neutral position of the plunger and valve means. The springs provide a means for permitting over-travel of the actuating mechanism when the plunger reaches its limit of travel and also assists a dump piston in overriding the actuating mechanism. The dampener provides a time delay in the actuating of the plunger which also provides a means for minimizing fluctuations in the actuation of the valve means caused by a vehicle encountering large bumps in the road. The dampener has a unique structure in that it is formed of two transparent parts between which is located a piston and a viscous fluid visible through the transparent parts. The actuating means is unique by providing rotatable eccentric means on each side of the sleeve adapted to actuate the sleeve and a -52- forked actuator arm having two arms connected to each of the rotatable eccentric means to provide for a balanced actuation of the plunger and valve means. -53-
Borden Ladner Gervais Llp
Hadley Products Division Of Nelson Metal Products Corp.
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