A front axle suspension system for a vehicle chassis includes first and second links pivotally connected to the chassis and extending downwardly therefrom, the second link being positioned rearwardly of the first link. A coupler link is pivotally connected to the lower ends of the first and second links and extends forwardly from them. The front axle is connected to the coupler link and is adapted to carry a front wheel for rotation about a generally horizontal centerline. A spring and dampener mechanism interconnects the coupler link and chassis to yieldably resist movement of the axle relative to the chassis. The pivotal connections of the first, second and coupler links are so arranged that the instantaneous center of the suspension system will always be below and rearwardly of the front wheel centerline.
Iowa State University Research Foundation, Inc.
Claar, Paul W. II, "Front axle suspension system for a vehicle chassis" (1983). Iowa State University Patents. 39.