公开(公告)号：US09555289B2

公开(公告)日：2017-01-31

申请号：US14749200

申请日：2015-06-24

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kohei Mimura ,  Takahiro Sajima ,  Hyoungchol Kim ,  Masahide Onuki

IPC: A63B37/06 ,  A63B37/00

CPC classification number: A63B37/0018 ,  A63B37/0017 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0021 ,  A63B37/009 ,  A63B37/0096

Abstract: A golf ball has a large number of dimples on a surface thereof. The golf ball meets the following mathematical formula (I): 1.320≦L1≦1.420 (I), where L1 represents a ratio of a lift coefficient CL1 which is measured under conditions of a Reynolds number of 1.290×105 and a spin rate of 2820 rpm, relative to a lift coefficient CL2 which is measured under conditions of a Reynolds number of 1.290×105 and a spin rate of 1740 rpm.

Abstract translation: 高尔夫球在其表面上具有大量凹坑。 高尔夫球符合以下数学公式（I）：1.320≤L1≤1.420（I），其中L1表示在雷诺数为1.290×105的条件下测得的升力系数CL1与旋转速率为2820的比例 rpm，相对于在雷诺数为1.290×105和旋转速率为1740rpm的条件下测量的升力系数CL2。

公开(公告)号：US09550093B2

公开(公告)日：2017-01-24

申请号：US14839387

申请日：2015-08-28

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kohei Mimura ,  Takahiro Sajima

IPC: A63B37/06 ,  A63B37/00

CPC classification number: A63B37/0006 ,  A63B37/0021 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/0077 ,  A63B37/009 ,  A63B37/0092 ,  A63B37/0096

Abstract: A golf ball 2 includes a core 4, a mid layer 6 and a cover 8. The golf ball 2 further includes a large number of dimples 10 on a surface thereof. The surface has a northern hemisphere N and a southern hemisphere S. Each of the hemispheres has a high-latitude region 14, a mid-latitude region 18 and a low-latitude region 16. The number of planes that can divide a dimple pattern of the hemisphere so that divided dimple patterns are mirror symmetry to each other is one. Neither a dimple pattern of the high-latitude region 14 nor a dimple pattern of the low-latitude region 16 is rotationally symmetrical. A product THm of a thickness and a hardness for the mid layer 6, and a product THc of a thickness and a hardness for the cover 8 satisfy the following mathematical formula. THc−THm≦50

Abstract translation: 高尔夫球2包括芯4，中间层6和盖8.高尔夫球2在其表面上还包括大量凹坑10。 该表面具有北半球N和南半球S.每个半球具有高纬度区域14，中纬度区域18和低纬度区域16.可以分割凹坑图案的平面的数量 这个半球使得分开的凹坑图案彼此镜像对称是一个。 高纬度区域14的凹坑图案和低纬度区域16的凹坑图案都不是旋转对称的。 用于中间层6的厚度和硬度的产品THm以及盖8的厚度和硬度的乘积THc满足以下数学公式。 THC-THM＆nlE; 50

公开(公告)号：US09403062B2

公开(公告)日：2016-08-02

申请号：US14072902

申请日：2013-11-06

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hyoungchol Kim ,  Masahide Onuki ,  Takahiro Sajima ,  Kohei Mimura

IPC: A63B37/14 ,  A63B37/00 ,  G06T17/20

CPC classification number: A63B37/002 ,  A63B37/0006 ,  A63B37/0007 ,  A63B37/0018 ,  A63B37/0021 ,  G06T17/20

Abstract: A golf ball has, on a surface thereof, a rugged pattern composed of a land and a large number of dimples. A method for designing the rugged pattern includes the steps of: (1) assuming a large number of circles on a surface of a phantom sphere; (2) assuming a large number of generating points 16 based on positions of the large number of circles; (3) assuming a large number of Voronoi regions 18 on the surface of the phantom sphere by a Voronoi tessellation based on the large number of generating points 16; and (4) assigning a dimple and a land to the surface of the phantom sphere based on contours of the large number of Voronoi regions 18.

Abstract translation: 高尔夫球的表面具有由陆地和大量凹坑构成的凹凸图案。 用于设计凹凸图案的方法包括以下步骤：（1）在幻影球的表面上假设大量的圆; （2）基于大量圆的位置假设大量的生成点16; （3）基于大量的生成点16，通过Voronoi镶嵌假设在幻影球的表面上存在大量的Voronoi区域18; 和（4）基于大量Voronoi区域18的轮廓，将一个凹坑和一个土地分配给幻影球体的表面。

公开(公告)号：US20160184645A1

公开(公告)日：2016-06-30

申请号：US14919303

申请日：2015-10-21

Applicant: DUNLOP SPORTS CO., LTD.

Inventor： Kohei Mimura ,  Takahiro Sajima

IPC: A63B37/00

CPC classification number: A63B37/0018 ,  A63B37/0006 ,  A63B37/0016 ,  A63B37/0017 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0021

Abstract: A golf ball has a large number of dimples 10 on a surface thereof. The dimples 10 include a plurality of small dimples 10S each having an area of less than 8.0 mm2, and a plurality of large dimples 10L each having an area of equal to or greater than 8.0 mm2. A ratio PS of a sum of areas of all the small dimples 10S to a surface area of a phantom sphere of the golf ball is less than 2.0%. The number NL of the large dimples 10L is equal to or greater than 250 but less than 450. The number NL of the large dimples 10L and a degree G of uniformity of areas of the large dimples 10L satisfy the following mathematical formula (II): G

Abstract translation: 高尔夫球在其表面上具有大量凹坑10。 凹坑10包括各自具有小于8.0mm 2的面积的多个小凹坑10S，以及各自具有等于或大于8.0mm 2的面积的多个大凹坑10L。 所有小凹坑10S的面积之和与高尔夫球的幻影球的表面积之和的比值PS小于2.0％。 大凹坑10L的数量NL等于或大于250但小于450.大凹坑10L的数量NL和大凹坑10L的面积的均匀度G满足以下数学式（II）： G <0.0032·NL + 0.26（II）。