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    Car tyre
    1.
    发明授权
    Car tyre 有权

    公开(公告)号：US11161374B2

    公开(公告)日：2021-11-02

    申请号：US16662459

    申请日：2019-10-24

    申请人： PIRELLI TYRE S.P.A.

    发明人： Alessandro Ascanelli ,  Roberto Bolzoni ,  Anna Paola Fioravanti ,  Stefano Montesello

    IPC分类号： B60C11/03 ,  B60C11/12

    摘要： A car tyre having a tread that extends in axial direction for a width the tread including a central portion arranged across an equatorial plane, and two lateral portions opposed with respect to the central portion. The central portion is separated from the lateral portions of the tread by two circumferential grooves. The circumferential grooves have a width greater than about 6 mm. The central portion extends in axial direction for a width less than 20% of the width of the tread and includes a plurality of first sipes. Each lateral portion has a width greater than 30% of the width of the tread, and each lateral portion includes, furthermore, a plurality of transversal grooves. The transversal grooves of a lateral portion include at least a first inclined length that extends from a zone proximal to the respective circumferential grooves, moving away from the equatorial plane. The first inclined length has an inclination α≤60° with respect to equatorial plane. Each lateral portion includes a plurality of sipes. The density of the sipes decreases moving away from the equatorial plane.