Patent ID: 6390219
Filing Date: 2002-05-21
Classification: B62M

Abstract:
A snowmobile suspension, comprising:a slide frame for engagement with an endless track; a frame element for connection to a chassis on a snowmobile; a lower arm assembly with a lower end and an upper end, the upper end being pivotally mounted relative to the slide frame; a suspension arm with an upper end pivotally mounted relative to the frame element and a lower end pivotally mounted to the lower end of the lower arm assembly; and a shock absorber with an upper end pivotally mounted relative to the frame element and a lower end pivotally mounted relative to the suspension arm, wherein the upper end of the suspension arm is positioned forward of and below the upper end of the shock absorber, wherein the upper end of the shock absorber is positioned adjacent the frame element and the lower end of the shock absorber is positioned adjacent the slide frame, wherein pivotal cooperation between (i) the upper end of the suspension arm, (ii) the upper end of the shock absorber, (iii) the lower end of the suspension arm, and (iv) the lower end of the shock absorber provide for a substantially constant motion-ratio as the slide frame collapses toward the frame element.