Motorcycle drive wheel suspension system
AssigneePerformance Industries, Inc.
InventorEyvind Boyesen
Life of this patent
Estimating the term…
Abstract
A suspension system for the drive wheel of a motorcycle driven by a chain cooperating with sprockets on the engine and wheel shafts. The suspension system comprises a parallelogram linkage arrangement associated with the swing arm, with the linkage parts positioned in the region between the wheel and the motor.
Claims7
In a motorcycle having a frame, a drive wheel, a motor, and wheel drive mechanism including a motor sprocket, a wheel sprocket, and a drive chain connecting the sprockets, a drive wheel suspension system comprising first and second levers pivotally mounted on fixed axes respectively spaced, one above and the other below the axis of the motor sprocket, first linkage pivotally interconnecting said levers on axes spaced to provide a first parallelogram linkage, a swing arm for the drive wheel pivotally connected with said first linkage on an axis between the axes of pivotal interconnection of said first linkage with the levers, one of said levers having an extension beyond the first linkage, a swing arm link pivotally interconnecting the swing arm and said extension and forming a second parallelogram linkage with said first linkage, the swing arm and said lever extension, and a shock absorber connected with the wheel suspension system for resisting drive wheel deflection.
In a motorcycle having a frame, a drive wheel, a motor, and wheel drive mechanism including a motor sprocket, a wheel sprocket, and a drive chain connecting the sprockets, a drive wheel suspension system comprising first and second levers pivotally mounted on fixed axes spaced, respectively, one above and the other below the axis of the motor sprocket, the levers being extended from said axes toward the drive wheel, first linkage positioned between the engine sprocket and the wheel and pivotally interconnecting said levers on axes positioned to maintain said levers in substantially parallel relation, a swing arm for the drive wheel pivotally connected with said first linkage on an axis intermediate the axes of pivotal interconnection of said linkage with the levers, second linkage pivotally connecting the swing arm with at least one of said levers and maintaining said swing arm in generally parallel relation to said one lever, and means connected with the wheel suspension system for resisting drive wheel deflection.
In a motorcycle having a frame, a drive wheel, a motor and wheel drive mechanism including a motor sprocket, a wheel sprocket, and a drive chain connecting the sprockets, a drive wheel suspension system comprising first and second levers pivotally mounted on fixed axes spaced, respectively, one above and the other below the axis of the motor sprocket, the levers lying in spaced parallel planes and being extended from said axes toward the drive wheel, link mechanism interconnecting said levers and including a shaft extended transversely of said parallel planes in a position intermediate the levers and further including link elements connected with said shaft and extended therefrom for pivotal connection with said levers, a swing arm for the drive wheel connected with said shaft, one of said levers having an extension beyond its connected link element, a swing arm link pivotally interconnecting the swing arm and said extension and forming a parallelogram linkage with said swing arm, said first link and said arm extension, and means connected with the wheel suspension system for resisting drive wheel deflection.
Dependencies are inferred from the claim text.