(under subclass 273) Spring device including four rigid links pivoted together to form a four-sided polygon, wherein the relatively moving parts of the vehicle are connected to or serve as separate links, whereby relative movement between the vehicle parts causes the shape of the polygon to change.
(1) Note. Typically, the links comprise the upper and lower control arms, the wheel axle support, and the vehicle chassis, and the arrangement is applied to separate wheels as an "independent suspension" system.
