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Mike Kojima

Anthony S Ellsworth

Bicycles are disclosed which include a rear wheel suspension system. The rear wheel suspension of the present bicycles are designed to move an instant center to track a chain torque line of the bicycle and generally improve performance of the bicycles. In certain embodiments, the rear wheel suspension system includes a shock absorber apparatus attached to the main frame of the bicycle. In additional embodiments, the shock absorber apparatus includes a bell crank or a rotary torsion spring. Embodiments are also described which include a gear box. Methods of improving bicycle performance by tracking a chain torque line with an instant center are also disclosed.

Bicycle suspension apparatus and related method

The invention is directed to a shock absorbing wheel suspension apparatus and related method. The preferred wheel suspension includes upper and lower rocker arms pivotably attached to a bicycle frame, rear shockstays pivotably attached to the upper and lower rocker arms, and a shock absorbing element. The preferred configuration of the wheel suspension results in improved performance through the desirable alignment of various force and torque lines over a wide range of loading conditions.

A shock absorbing wheel suspension apparatus includes an upper rocker arm ( ) and a lower roker arm ( ) pivotally attached to a bicycle frame ( ) with rear shock stays ( ) pivotally attached to one end of the upper and lower rocker arms. A shock absorbing element (J) is connected to the opposite ends of the upper and lower rocker arms. This arrangement increases performance by aligning forces for various loading conditions.

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Cypress, CA, United States of America

Mike Kojima