| 摘要 |
1,144,554. Pneumatic tyres. PIRELLI, S.p.A. 30 March, 1966 [14 April. 1965], No. 14012/66. Heading B7C. A pneumatic tyre with braced tread has sidewalls of different rigidities. The more rigid sidewall may contain more fabric plies than the other sidewall and/or may include a strip 22 of elastomeric or like material which is harder than any other elastomer in the tyre. In one embodiment (Fig. 3, not shown) the less rigid sidewall contains a carcase ply of radial cords whereas the other sidewall contains a pair of cross-laid carcase plies whose cords make between 10 and 45 degrees with radial planes. The stiffer sidewall may contain carcase plies whose materials are less extensible than those in the, other sidewall. |
