Rolling element for use in e.g. motor vehicle, has track collaborating with main and secondary rollers, where rotation axle of secondary roller is moved while remaining at constant distance from rotation axle of main roller

摘要

The element has a main roller (1), a secondary roller (2), and a track (100) collaborating with the main and secondary rollers. Rotation axle of the secondary roller is moved while remaining at constant distance from a rotation axle of the main roller. The track touches the ground only through a limited contact area or a set of elementary ground-connection surfaces whose total length is lower than or equal to 20 % of total length of the track. A handlebar pivots around the axle of the main roller. An independent claim is also included for a vehicle.