| 摘要 |
<p>A device for shrouding the tread regions of a tyre so as to improve the grip of the tyre with a road surface under conditions of snow, ice mud etc, includes an endless track forming element (7) which circumscribes the tread region (3) of the tyre (1) on which it is fitted. A series of openings (9) is provided in the element the openings being spaced around the circumference of the element. In use the extra grip is afforded by the snow, ice, mud being able to enter the openings thereby to give greater adhesion. The flexure of the tyre and element (7) serving to eject the snow, ice, mud from the openings so that as the vehicle travels openings are continuously presented. Preferably the element is made from a conventional tyre by punching out holes in the tread regions thereof. </p> |
