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    Heavy duty pneumatic tires with reduced belt weight
    1.
    发明授权
    Heavy duty pneumatic tires with reduced belt weight 失效
    减轻皮带重量的重型充气轮胎

    公开(公告)号：US5647928A

    公开(公告)日：1997-07-15

    申请号：US547484

    申请日：1995-10-24

    Applicant: Yujiro Umezawa

    Inventor： Yujiro Umezawa

    IPC: B60C9/00 ,  B60C9/18 ,  B60C9/20

    CPC classification number: B60C9/2009 ,  B60C9/2006 ,  B60C2009/2077 ,  Y10S57/902 ,  Y10T152/10792

    Abstract: A heavy duty pneumatic tire comprises a radial carcass, and a belt comprised of at least three belt layers, in which a first belt layer contains cords inclined at a large cord angle with respect to an equatorial plane of the tire and each of a second belt layer and a third belt layer contains cords inclined at a small cord angle with respect to the equatorial plane and cords of the second and third belt layers are crossed with each other. In the tire, the first belt layer is comprised of steel cords having a 1.times.N structure (N: 2-5) and/or each of the second and third belt layers is comprised of steel cords obtained by twisting 6 sheath steel filaments each having a filament diameter of not more than 0.30 mm around a single core filament at a twisting angle of not more than 6.degree..

    Abstract translation: 重型充气轮胎包括径向胎体和由至少三个带束层组成的皮带，其中第一带束层包含相对于轮胎的赤道平面以大的帘线角倾斜的帘线，并且每个第二带 层和第三带层包含相对于赤道平面以小绳角度倾斜的帘线，并且第二和第三带束层的帘线彼此交叉。 在轮胎中，第一带层由具有1xN结构（N：2-5）的钢帘线构成，和/或第二和第三带束层中的每一个由通过扭绞6根护套钢丝而获得的钢丝帘线组成， 长丝直径不大于0.30mm，单丝芯以不超过6°的扭转角度。

    Heavy duty pneumatic tires with reduced belt weight
    6.
    发明授权
    Heavy duty pneumatic tires with reduced belt weight 失效
    减轻皮带重量的重型充气轮胎

    公开(公告)号：US5520233A

    公开(公告)日：1996-05-28

    申请号：US350078

    申请日：1994-11-29

    Applicant: Yujiro Umezawa

    Inventor： Yujiro Umezawa

    IPC: B60C9/00 ,  B60C9/18 ,  B60C9/20 ,  D07B1/06

    CPC classification number: B60C9/2009 ,  B60C9/2006 ,  B60C2009/2077 ,  Y10S57/902 ,  Y10T152/10792

    Abstract: A heavy duty pneumatic tire comprises a radial carcass, and a belt comprised of at least three belt layers, in which a first belt layer contains cords inclined at a large cord angle with respect to an equatorial plane of the tire and each of a second belt layer and a third belt layer contains cords inclined at a small cord angle with respect to the equatorial plane and cords of the second and third belt layers are crossed with each other. In the tire, the first belt layer is comprised of steel cords having a 1.times.N structure (N: 2-5) and/or each of the second and third belt layers is comprised of steel cords obtained by twisting 6 sheath steel filaments each having a filament diameter of not more than 0.30 mm around a single core filament at a twisting angle of not more than 6.degree..

    Abstract translation: 重型充气轮胎包括径向胎体和由至少三个带束层组成的皮带，其中第一带束层包含相对于轮胎的赤道平面以大的帘线角倾斜的帘线，并且每个第二带 层和第三带层包含相对于赤道平面以小绳角度倾斜的帘线，并且第二和第三带束层的帘线彼此交叉。 在轮胎中，第一带层由具有1xN结构（N：2-5）的钢帘线构成，和/或第二和第三带束层中的每一个由通过扭绞6根护套钢丝而获得的钢丝帘线组成， 长丝直径不大于0.30mm，单丝芯以不超过6°的扭转角度。

    Heavy duty radial tires with metallic carcass ply
    8.
    发明授权
    Heavy duty radial tires with metallic carcass ply 失效
    具有金属胎体帘布层的重型子午线轮胎

    公开(公告)号：US4966216A

    公开(公告)日：1990-10-30

    申请号：US245439

    申请日：1988-06-08

    Applicant: Kiyohito Kawasaki ,  Yujiro Umezawa ,  Toshio Sugawara

    Inventor： Kiyohito Kawasaki ,  Yujiro Umezawa ,  Toshio Sugawara

    IPC: B60C9/00 ,  D07B1/06

    CPC classification number: D07B1/062 ,  B60C9/0007 ,  Y10S57/902

    Abstract: In a heavy duty radial tire, metal cords of a single layer construction obtained by twisting 3.about.5 metallic filaments having a filament diameter of 0.13.about.0.32 mm, each of which cords having an elongation P.sub.1 under a load of 0.25.about.5 kgf/cord of 0.35.about.1.0% as an arithmetic mean value are arranged as a carcass ply so that a distance between cords at an end of the carcass ply is not less than 0.25 mm. Thus, it is possible to largely reduce the tire weight, avoid problems on the operability such as bead rising and the like, and considerably improve the fracture resistance, corrosion fatigue resistance and fretting resistance at carcass ply end as well as resistance to external damage in sidewall (resistance to cord breaking up) of the radial tire.Furthermore, the above performances can be further enhanced when the tensile strength TS and filament diameter d of the metallic filament satisfy the particular relation at a load index according to ISO 4209/1 of not more than 121 or not less than 122.

    Abstract translation: 在重载子午线轮胎中，金属帘线具有单一扭转结构。 通过扭转具有丝直径的3至5个金属丝。 为0.13〜0.32mm，并且具有伸长率P1的算术平均值。 在0.25〜5kgf /片的载荷范围内的0.35〜1.0％作为胎体帘布层设置，使得胎体帘布层的端部处的帘线间隙为至少0.25mm。 这种布置使得可以显着降低粘结重量，以避免松散珠等的可加工性问题，从而提高胎体帘布层端部处的抗断裂性，耐腐蚀性，耐疲劳性和抗微动性。 同时，可以提高子午线轮胎的抗刮伤性（抗绳断裂性）。 子午线轮胎可以被设计成满足金属丝的拉伸强度TS和丝直径之间的特定关系。 d在符合ISO 4209/1的负荷指数为121以下且122以上的范围内。

    Steel cords for the reinforcement of rubber articles
    9.
    发明授权
    Steel cords for the reinforcement of rubber articles 失效
    用于加固橡胶制品的钢丝绳

    公开(公告)号：US4707975A

    公开(公告)日：1987-11-24

    申请号：US810460

    申请日：1985-12-18

    Applicant: Yujiro Umezawa

    Inventor： Yujiro Umezawa

    IPC: D07B1/06

    CPC classification number: D07B1/062 ,  D07B1/0626 ,  D07B1/0633 ,  D07B2201/2006 ,  D07B2201/2023 ,  D07B2201/2028 ,  D07B2201/2037 ,  D07B2201/2051 ,  D07B2401/207 ,  Y10S57/902

    Abstract: A steel cord for the reinforcement of rubber articles is disclosed, which comprises a central base structure composed of 1 to 4 steel filaments, and at least one coaxial layer composed of plural steel filaments arranged around the central base structure so as to adjoin them to each other, these steel filaments being twisted in the same direction at the same pitch. In the steel cord of this type, the steel filaments constituting the central base structure have the same diameter (dc), while at least one steel filament of the coaxial layer has a diameter (dso) smaller than the diameter (dc) of the steel filament in the central base structure.

    Abstract translation: 公开了一种用于加强橡胶制品的钢丝帘线，其包括由1至4根钢丝组成的中心基底结构，以及至少一个由围绕中心基底结构布置的多根钢丝构成的同轴层， 另外，这些钢丝以相同的间距在相同方向上扭转。 在这种钢帘线中，构成中心基体结构的钢丝具有相同的直径（dc），同轴层的至少一根钢丝的直径（dso）小于钢的直径（dc） 灯丝在中心基部结构。

    Pneumatic radial tires
    10.
    发明授权
    Pneumatic radial tires 失效
    气动子午线轮胎

    公开(公告)号：US4572264A

    公开(公告)日：1986-02-25

    申请号：US561508

    申请日：1983-12-15

    Applicant: Yujiro Umezawa ,  Shigehisa Sano ,  Takao Ogino

    Inventor： Yujiro Umezawa ,  Shigehisa Sano ,  Takao Ogino

    IPC: B60C9/00 ,  D07B1/06

    CPC classification number: B60C9/0007 ,  D07B1/062 ,  D07B1/0626 ,  D07B1/0633 ,  D07B2201/2031 ,  D07B2201/2032 ,  Y10S57/902

    Abstract: A pneumatic radial tire is disclosed, which comprises steel cords having a two or three layer construction represented by a designation of l+m or l+m+n as a tire reinforcement, wherein two layers at a center side of a transverse section in the steel cord have the same twisting direction but different twisting pitches. In this steel cord, m filaments constituting an outer layer are arranged so as to enter into an inside of a circumscribed circle enveloping l filaments of an inner layer at a non-contact region above a predetermined value and have a form ratio of 90-110%.

    Abstract translation: 公开了一种充气子午线轮胎，其包括具有由称为l + m或l + m + n作为轮胎加强件的两层或三层结构的钢丝帘线，其中两层在横截面的中心侧 钢帘线具有相同的扭转方向，但扭转间距不同。 在该钢丝帘线中，构成外层的m根细丝布置成在非接触区域的预定值以上的包含1层细丝的外接圆的内侧进入，形状比为90-110 ％。

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