Snowmobile suspension system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 17, 2002
Grant Date -
N/A
app pub date -
Sep 19, 2000
filing date -
Sep 19, 2000
priority date (Note) -
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status (Latency Note)
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Abstract
An improved torsion type rear suspension system for a snowmobile. The suspension includes a pair of rails movable with respect to the snowmobile body and a pair of torsion springs disposed between the body and the rails for biasing the suspension toward its extended position. Also included is a cam block having a contoured cam surface which engages a leg of the torsion spring at a variable point of contact. As the suspension moves from the extended to the collapsed position, the effective length of the spring leg is reduced, resulting in a nonlinear change in spring force as a function of deflection. The cam block may be adjusted with respect to the suspension rails with an eccentric to permit additional adjustment of the spring force function to compensate for varying terrain, vehicle speed, and operator weight.
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