Patent ID: 8191905

Claim:
A retractable wheel system for snowmobile ski, the snowmobile ski being connected to the snowmobile with a kingpin, said kingpin being connected to the snowmobile ski through a first opening and a second opening in said ski, said system having a retracted configuration and an extended configuration, said extended configuration being actuated by a user of the snowmobile and wherein said system is configured to return automatically in said retracted configuration, said system comprising: a) a spring having a first extremity and a second extremity, said spring being pre-tensioned a predetermined amount; b) a pivoting member connected to said ski and to said spring, said pivoting member being actuated by said spring; c) a shaft having a first and a second extremity, said shaft comprising a slot at said second extremity, said pivoting member being pivotally mounted along said shaft, wherein said first extremity of said spring is inserted in said slot; d) a connector, said connector being mounted on said second extremity of said shaft, said connector comprising a plurality of holes configured to receive said second extremity of said spring; e) a wheel rotatably connected to said pivoting member; and f) a stopper.