Multi-piece solid golf ball
    2.
    发明授权

    公开(公告)号:US11938378B2

    公开(公告)日:2024-03-26

    申请号:US17828150

    申请日:2022-05-31

    Inventor: Hideo Watanabe

    Abstract: In a golf ball having a core, envelope layer, intermediate layer and cover, the core has a specific hardness profile, the resin materials making up either or both of the envelope layer and the intermediate layer has a material hardness on the Shore D hardness scale of at least 65 and has a specific gravity of at least 1.05, and the Shore C hardness relationships among the core center, surface of the envelope-encased layer and surface of the intermediate layer-encased sphere satisfy the following conditions:

    surface hardness of envelope layer-encased sphere

    MULTI-PIECE SOLID GOLF BALL
    3.
    发明公开

    公开(公告)号:US20240066359A1

    公开(公告)日:2024-02-29

    申请号:US18493381

    申请日:2023-10-24

    Inventor: Hideo WATANABE

    Abstract: In a multi-piece solid golf ball having a core, an intermediate layer encasing the core and a cover which encases the intermediate layer and has numerous dimples on an outside surface thereof, the intermediate layer is formed of a resin material comprising an ionomer resin as a base resin and an inorganic granular filler, the cover is formed of a urethane resin material, the core has a diameter of at least 38.0 mm, the core has specific deflection, the sphere obtained by encasing the core with the intermediate layer (intermediate layer-encased sphere) has a surface hardness on the Shore D hardness scale of at least 69, the ball has a surface hardness on the Shore D hardness scale of 62 or less, and the (intermediate layer thickness)/(core diameter) value is from 0.025 to 0.043, the (cover thickness)/(core diameter) value is from 0.014 to 0.027.

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