| 摘要 |
A device providing road-engaging elements adapted to extend transversely across and to be yieldably drawn and held against the road-engaging treads of pneumatic tires on a vehicle. The device is constructed to be readily applied to each tire from the outer side thereof relative to the side adjacent the vehicle body, without fastening it to the wheel. Said road-engaging elements are each generally of U-shape to straddle the tire with the closed end of the U extending across the tread and one of the legs at each opposite side, providing an inner leg at the inner side and an outer leg at the outer side, and the elements are at opposite sides of the tire in pairs spaced around the circumference. The device includes a member engageable with, but not securable to the outer side of the tire, and yieldable tensioning means at the outer side only of a wheel, yieldably hold said member substantially coaxial with the wheel and against said outer side of the tire, and yieldably hold the elements on the tire, which tensioning means, outer legs, and said member are arranged and formed to coact to hold the road-engaging elements substantially uniformly tight against the road-engaging surface of the tire tread from side-to-side of the tread irrespective of the degree of radially inwardly directed tension applied to said outer legs by said tensioning means. Thus the inner legs on said elements may be quite short.
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