Strut-type steering ski suspension for snowmobiles
AssigneeYamaha Hatsudoki Kabushiki Kaisha
InventorTakashi Kobayashi
Life of this patent
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Abstract
A strut-type steering ski suspension having minimal height for a given stroke. The suspension includes shock-absorber means with a movable cylinder and a fixed rod, the rod being fixed relative to the frame of the snowmobile. A ski is mounted to the lower end of the movable cylinder. A bias spring is incorporated in the suspension, which bears in compressive opposition between the lower portion of the movable cylinder and the rod or some other structure which is fixed to the frame, thereby utilizing otherwise "dead" space for the spring, and shortening the length of suspension needed for a given stroke length.
Claims8
In a steering ski suspension for a snowmobile, said snowmobile having a frame, said suspension including a stationary cylinder fixed to said frame a movable cylinder slidably mounted in said stationary cylinder, and a ski mounted to the lower end of said movable cylinder so as to turn therewith, the improvement comprising:
- a cap member fixed to the upper end of said stationary cylinder;
- and coil spring bias means entirely confined within one of said cylinders and compressively opposed between a lower portion of said movable cylinder and said cap member or structure rigidly attached to said cap member, said movable cylinder being rotatably and axially movable in said stationary cylinder whereby to make the ski steerable and to provide an elastic suspension for said frame.
Dependencies are inferred from the claim text.