Retractable wheel system for snowmobile ski

摘要

The present invention provides a retractable wheel system for snowmobile skis. The retractable wheel system of the present invention may be installed on a snowmobile ski without affecting its structural integrity by installing the system on the reinforced portion of the snowmobile ski. When a user circulates in a path with little or no snow, the retractable wheel system is positioned in the extended configuration by the user and the system will automatically return to the retracted configuration when the user returns in a snowy zone. This is realized by using a pre-tensioned spring that will reposition the wheel in the retracted configuration. The spring transmits a rotational movement to the member on which the wheel is fixed.

主权项

1. A shaft to be used with a spring comprising a first and a second extremity, the shaft having an axis, wherein the shaft comprises :
a) a first and a second extremity; b) a slot extending into one of the first and second extremities of the shaft, the slot comprising a top portion and a bottom portion, the slot being configured to receive the first extremity of the spring; wherein the slot is configured to force the first extremity of the spring towards the bottom portion of the slot when the spring is twisted to be tighter.