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    Tire
    3.
    发明授权
    Tire 有权

    公开(公告)号：US11964519B2

    公开(公告)日：2024-04-23

    申请号：US17289025

    申请日：2019-10-31

    Applicant: BRIDGESTONE CORPORATION

    Inventor： Keiichi Hasegawa ,  Takayuki Kurata

    IPC: B60C15/06 ,  B60C15/00 ,  B60C15/05

    CPC classification number: B60C15/05 ,  B60C15/0018 ,  B60C15/0603 ,  B60C15/0607

    Abstract: The bead portion of the tire has an inner bead provided inside the tire width direction of a carcass ply and an outer bead provided outside the tire width direction of the carcass ply. The inner bead and the outer bead have a bead core portion including a bead cord formed of a metal material, and a filler portion provided outside the tire radial direction of the bead core portion and formed of a resin material. The inner bead and the outer bead sandwich a carcass ply.

    Pneumatic tire
    5.
    发明授权
    Pneumatic tire 有权

    公开(公告)号：US10987976B2

    公开(公告)日：2021-04-27

    申请号：US15577770

    申请日：2016-04-19

    Applicant: BRIDGESTONE CORPORATION

    Inventor： Takayuki Kurata ,  Shinsaku Katayama ,  Masakazu Amano

    IPC: B60C11/13 ,  B60C11/12 ,  B60C11/03 ,  B60C11/00 ,  B60C11/11 ,  B60C3/04

    Abstract: By forming a ground contact edge side of lug grooves such that the groove depth becomes shallower in groove depth from the tire equatorial plane side toward the ground contact edge, and by setting an average angle of inclination formed between a tread face and a groove bottom to be not more than 5°, water expulsion is performed smoothly in the vicinity of the ground contact edge while securing the rigidity of land portions in the vicinity of the ground contact edge. This enables a high degree of both wet performance and dry performance to be achieved.

    Pneumatic tire having lug grooves forming a direction tread pattern
    7.
    发明授权
    Pneumatic tire having lug grooves forming a direction tread pattern 有权

    公开(公告)号：US10245889B2

    公开(公告)日：2019-04-02

    申请号：US14648304

    申请日：2013-11-28

    Applicant: BRIDGESTONE CORPORATION

    Inventor： Shinsaku Katayama ,  Eisuke Seta ,  Yoshio Kaji ,  Masafumi Koide ,  Takayuki Kurata ,  Hiroyuki Katsuno ,  Masakazu Amano ,  Ataka Takei

    IPC: B60C11/03 ,  B60C11/13 ,  B60C11/12 ,  B60C5/00

    Abstract: A pneumatic tire (10), which has, in the surface of the tread (11), lug grooves (15) on one side extending from one axial edge towards the axial center of the tire in such a manner as to intersect with the circumferential direction of the tire and lug grooves (15) on the other side extending in a symmetrically opposite direction from the axial center towards the other axial edge of the tire, has at least one circumferential groove (12) extending circumferentially around the tire. Also, circumferential grooves (12, 13a, 13b) are so formed as to satisfy a relationship of “1≤(S/L)≤3” where L is the axial length of the central region, which is the region enclosed by two straight parallel lines each passing through the center between the contact width center (CL) and the contact edge with the shoulder regions being the regions axially outside of the parallel lines, and S is the total of the groove areas of the circumferential grooves (12, 13a, 13b) disposed in the central region. Therefore, the pneumatic tire (10) not only secures the steering stability performance on wet road surfaces, but also improves the steering stability and wear resistance performance on dry road surfaces.

    Pneumatic tire
    10.
    发明授权
    Pneumatic tire 有权

    公开(公告)号：US10960711B2

    公开(公告)日：2021-03-30

    申请号：US15577769

    申请日：2016-04-19

    Applicant: BRIDGESTONE CORPORATION

    Inventor： Takayuki Kurata

    IPC: B60C11/13 ,  B60C11/12 ,  B60C11/03

    Abstract: Taking a groove side-wall to a position at ½ a groove depth from a tread face of lug groove as a tread-in side first inclined portion, and taking a groove side-wall from the position at ½ groove depth to a groove bottom as a tread-in side second inclined portion, then the following A1 is set less than the following B1. When viewed in cross-section orthogonal to a length direction of the lug groove: A1 is an area of a region enclosed by an imaginary line passing through an end portion on a tread face side of the tread-in side first inclined portion and perpendicular to the tread face, by an imaginary line passing through an end portion on a groove bottom side of the tread-in side first inclined portion and orthogonal to the imaginary line, and by the tread-in side first inclined portion; and B1 is an area of a region enclosed by an imaginary line passing through an end portion on a tread face side of the tread-in side second inclined portion and perpendicular to the tread face, by an imaginary line passing through the deepest portion of the lug groove and parallel to the tread face, and by the tread-in side second inclined portion.

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