US PATENT SUBCLASS 267 / 222-- .~.~.~.~ Quadrilateral suspension

US PATENT SUBCLASS 267 / 222
.~.~.~.~ Quadrilateral suspension

Current as of: June, 1999
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267 /	HD	SPRING DEVICES

2	DF	VEHICLE {14}
195	DF	.~ Mechanical spring and nonresilient retarder (e.g., shock absorber) {2}
217	DF	.~.~ Fluid retarder {4}
221	DF	.~.~.~ Helical coil spring {4}
222		.~.~.~.~ Quadrilateral suspension

DEFINITION

Classification: 267/222

Quadrilateral suspension:

(under subclass 221) Spring device including four 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 cause 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.