Patent ID: 7789118

Claim:
A device for increasing friction between a vehicle wheel and a road surface during winter driving conditions when the vehicle wheel is mounted on a vehicle and rests on a road surface, the device comprising: a continuous belt intended to encircle the largest circumference of the wheel; a flexible inner side portion that is fittable over the largest circumference of the wheel along a substantial portion thereof that is not in contact with the road surface and capable of pulling the continuous belt into position over the remaining portion of the largest circumference of the wheel as the wheel is rotating while remaining in contact with the road surface, such that the portion of the largest circumference of the wheel that was in contact with the road surface prior to rotation of the wheel is no longer in contact with the road surface due to the rotating of the wheel; and a flexible outer side portion disposed against the outer side surface of the wheel when the device is fitted on the wheel; wherein at least the flexible inner side portion has an elastic member; and wherein the flexible inner side portion is capable of being tightened against an inner side surface of the wheel by the elastic member when the device is fitted over the wheel.