초록 ▼

A rear suspension for motorcycles which employs primary and secondary torsion springs operating on the rotative axis of the horizontally disposed and rearwardly trailing fork carrying the powered traction wheel. The two springs are of selected resilience and are quickly replaceable without disassemb

A rear suspension for motorcycles which employs primary and secondary torsion springs operating on the rotative axis of the horizontally disposed and rearwardly trailing fork carrying the powered traction wheel. The two springs are of selected resilience and are quickly replaceable without disassembly of the suspension system, and each is adjustable for controlling the normal vehicle height and pitch attitude to be subjected to varying loads. Load application to this rear suspension system is substantially central of the vehicle and with the result that radius of gyration is minimized, unsprung weight is reduced, and with improved dynamics characterized by a spring-stop snubbing action resulting in increased traction and ground engagement capability for superior handling.

대표청구항 ▼

An adjustable rear suspension system for a motorcycle having a frame, said system comprising: a bearing means on the rear of said frame on a transverse, horizontally disposed axis; a rearwardly extending, rear wheel mounting fork; means at the forward end of said fork rotatably engaged on said frame

An adjustable rear suspension system for a motorcycle having a frame, said system comprising: a bearing means on the rear of said frame on a transverse, horizontally disposed axis; a rearwardly extending, rear wheel mounting fork; means at the forward end of said fork rotatably engaged on said frame about said axis; a torsion spring journaled in said bearing means about said axis, said spring having opposite ends projecting from respective ends of said bearing means; a first lever arm affixed to one of said torsion spring ends; a first connecting means for adjustably connecting said first lever arm to said frame, said first connecting means comprising a receiver in said first lever arm longitudinally spaced from said axis, an insert selectively rotationally mounted in said receiver, an offset opening in said insert, an opening in said frame aligned with said insert opening, and a fastener passing through said openings whereby the selective rotation of said insert about the axis of said offset opening angularly adjusts said first lever arm about said axis; a second lever arm affixed to the other of said torsion spring ends; and a second connecting means longitudinally spaced from said transverse axis, securing said second lever arm to said fork.