Patent ID: 6234264
Filing Date: 2001-05-22
Classification: B62M

Abstract:
A snowmobile suspension system configured to suspend a drive track to a snowmobile; said suspension system comprising:a front suspension arm having a proximate end pivotally mounted to the snowmobile; said front suspension arm having a distal end;a rear suspension arm having a proximate end pivotally mounted to the snowmobile; said rear suspension arm having a distal end;a pair of side rails; each side rail being pivotally mounted to said distal ends of said front and rear suspensions for suspension movements between a retracted position where the side rails are adjacent to the snowmobile and an extended position;a biasing assembly pivotally mounted to the snowmobile and to both said side rails; said biasing assembly biasing both said side rails towards said extended position; anda progressive spring assembly so mounted to said pair of side rails as to contact at least one of said front and rear suspension arms when said pair of side rails nears said retracted position thereby absorbing excess energy from said side rails to prevent forceful contact between the side rails and the snowmobile.