Patent ID: 7395890

Claim:
A track suspension for a snowmobile comprising: a) a rear arm having an upper end pivotally attachable to an underside of the snowmobile at an upper rear arm pivot, a rear arm crank extending from the rear arm at the upper end thereof, the rear arm having a lower end pivotally connected to a slide rail at a rear slide rail pivot; b) a front arm having an upper end pivotally attachable to the underside of the snowmobile at an upper front arm pivot, a front arm crank extending from the front arm at the upper end thereof; c) a front linkage having an anterior end pivotally connected to the front arm crank and having a posterior end pivotally attached to the rear arm crank at a posterior linkage pivot; and, d) a resilient element having an anterior end pivotally attached to the front linkage, the resilient element operable to resist pivoting movement of the rear arm about the upper rear arm pivot in response to movement of the rear slide rail pivot towards the underside of the snowmobile.