Anti-skid device, especially for pneumatic vehicle wheels on surfaces covered with ice and snow

The support arms (50) for the grips (50a) in contact with the snow or ice can be swung mutually about a midpoint located outside the midpoint (M) for the main support part (10) of the device, by providing a number of rotary bearings (30) corresponding to the number of support arms. Each bearing is joined to at least one support arm via the end (50b) facing the main support, which has a panel-like, ring-shaped or other geometric configuration. Aircraft wheels fitted with inflated tyres are prevented from skidding on snow or ice by an anti-skid mounted on one side of the wheel and comprising a number of support arms for grips that partially surround the tyre tread and are secured to a main support. Spikes, chain sections connecting adjacent grip supports, or chain mesh links extending in the peripheral direction of the tyre tread are used as grip members. Independent claims are also included for four similar anti-skid devices.