公开(公告)号：US20180056136A1

公开(公告)日：2018-03-01

申请号：US15649978

申请日：2017-07-14

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kohei MIMURA ,  Takahiro SAJIMA

IPC: A63B37/00

CPC classification number: A63B37/0005 ,  A63B37/0006 ,  A63B37/0012 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0022

Abstract: A golf ball 2 has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball 2 further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. An average depth Fav of the dimples 12 and an average height Hav of the minute projections 18 satisfy the following mathematical formula (1). Hav

公开(公告)号：US20170165529A1

公开(公告)日：2017-06-15

申请号：US15292559

申请日：2016-10-13

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hironori TAKIHARA ,  Takahiro SAJIMA

IPC: A63B37/00

CPC classification number: A63B37/0088 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0051 ,  A63B37/0063 ,  A63B37/0065 ,  A63B37/0074 ,  A63B37/008 ,  A63B37/0083 ,  A63B37/0087 ,  A63B37/009 ,  A63B37/0094 ,  A63B37/0096

Abstract: A golf ball 2 includes a core 4 and a cover 6. A value V calculated by the following mathematical formula is equal to or less than 1080 Hz. V=NF(2)2−2/3*NF(2)1 In the mathematical formula, NF(2)1 represents a secondary natural frequency of the core 4, and NF(2)2 represents a secondary natural frequency of the golf ball 2. A difference (H1s−H1o) between a Shore C hardness H1s at a surface of the core 4 and a Shore C hardness H1o at a central point of the core 4 is equal to or greater than 10. An amount of compressive deformation Df1 of the core 4 is equal to or greater than 4.1 mm.

公开(公告)号：US20170157468A1

公开(公告)日：2017-06-08

申请号：US15338889

申请日：2016-10-31

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kohei MIMURA ,  Takahiro SAJIMA

IPC: A63B37/00

CPC classification number: A63B37/0006 ,  A63B37/0012 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0021 ,  A63B37/0064 ,  A63B37/0075 ,  A63B37/008

Abstract: A golf ball 2 has a plurality of dimples on a surface thereof. A ratio So of a sum of areas of the dimples relative to a surface area of a phantom sphere of the golf ball is equal to or greater than 81.0%. A ratio Rs of a number of the dimples each having a diameter of equal to or greater than 9.60% but equal to or less than 10.37%, of a diameter of the golf ball, relative to a total number of the dimples, is equal to or greater than 50%. A dimple pattern of each hemisphere of the phantom sphere includes three units that are rotationally symmetrical to each other. A dimple pattern of each unit includes two small units that are mirror-symmetrical to each other. The golf ball meets the following mathematical formula (1). Rs≧−2.5*So+273  (1)

公开(公告)号：US20160332033A1

公开(公告)日：2016-11-17

申请号：US15133763

申请日：2016-04-20

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Yoshiko MATSUYAMA ,  Takahiro SAJIMA ,  Kohei MIMURA

IPC: A63B37/00 ,  A63B45/00

CPC classification number: A63B45/00 ,  A63B37/0022 ,  A63B37/0075 ,  A63B45/02 ,  A63B2209/00

Abstract: A golf ball according to the present invention includes a spherical core, a cover member including at least one layer that covers the core, and at least one coating layer that covers the cover member constituting an outermost layer. A plurality of dimples are formed in the cover member constituting the outermost layer. Roughness is formed on the surface of the coating layer. A maximum height Rz and an arithmetic average roughness Ra of the surface of the coating layer satisfy a relationship Rz≧Ra×6.0. The coating layer contains a lustrous material.

Abstract translation: 根据本发明的高尔夫球包括球形芯，包括至少一层覆盖芯的覆盖构件和覆盖构成最外层的覆盖构件的至少一个涂层。 在构成最外层的盖构件中形成多个凹坑。 在涂层的表面上形成粗糙度。 涂层表面的最大高度Rz和算术平均粗糙度Ra满足Rz≥Ra×6.0的关系。 涂层含有光泽材料。

公开(公告)号：US20160310798A1

公开(公告)日：2016-10-27

申请号：US15132909

申请日：2016-04-19

Applicant: Dunlop Sports Co. Ltd.

Inventor： Kohei MIMURA ,  Takahiro SAJIMA ,  Kosuke TACHIBANA

IPC: A63B37/00

CPC classification number: A63B37/0092 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0039 ,  A63B37/0043 ,  A63B37/0044 ,  A63B37/0045 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0064 ,  A63B37/0076

Abstract: An object of the present invention is to provide a golf ball traveling a great distance on driver shots. The present invention provides a golf ball comprising a spherical core including an inner layer and an outer layer, an intermediate layer and a cover, wherein a difference (HX+1−HX−1) between a hardness (HX+1) at a point outwardly away in a radial direction from a boundary between the inner layer and the outer layer of the spherical core by 1 mm and a hardness (HX−1) at a point inwardly away in the radial direction from the boundary between the inner layer and the outer layer of the spherical core by 1 mm is 0 or more in Shore C hardness, a surface hardness (HX+Y) of the spherical core is more than 65 in Shore C hardness, an angle α of a hardness gradient of the inner layer is 0° or more, a difference (α−β) between the angle α and an angle β of a hardness gradient of the outer layer is 0° or more, a total thickness of a thickness (Tm) of the intermediate layer and a thickness (Tc) of the cover is 3 mm or less, and the cover has a highest hardness among the constituent members of the golf ball.

Abstract translation: 本发明的目的是提供一种在驾驶员镜头上行驶很远的高尔夫球。 本发明提供一种高尔夫球，其包括具有内层和外层的球形芯，中间层和盖，其中在一点处的硬度（HX + 1）之间的差（HX + 1-HX-1） 在径向方向上从球形芯的内层和外层之间的边界向外远离1mm，并且在径向方向上从内层和内层之间的边界向内的点处的硬度（HX-1） 球状芯的外层1mm的肖氏C硬度为0以上，球状芯的表面硬度（HX + Y）在肖氏C硬度中大于65，内层的硬度梯度的角度α 为0°以上时，外层的硬度梯度的角度α和角度β之间的差（α-β）为0°以上，中间层的厚度（Tm）和 盖子的厚度（Tc）为3mm以下，盖部件中的硬度最高 高尔夫球的球员。

公开(公告)号：US20160287942A1

公开(公告)日：2016-10-06

申请号：US15178179

申请日：2016-06-09

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hyoungchol KIM ,  Masahide ONUKI ,  Takahiro SAJIMA ,  Kohei MIMURA

IPC: A63B37/00

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：US20160096076A1

公开(公告)日：2016-04-07

申请号：US14856721

申请日：2015-09-17

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kohei MIMURA ,  Takahiro SAJIMA ,  Hyoungchol KIM

IPC: A63B37/00 ,  G06F17/50

CPC classification number: A63B37/0006 ,  A63B37/0009 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/0075

Abstract: A golf ball 2 has a large number of dimples 10 on a surface thereof. The contours of the dimples 10 are non-circular. A standard deviation of areas of the dimples 10 is equal to or less than 1.7 mm2. A ratio of a total area of the dimples 10 relative to a surface area of a phantom sphere of the golf ball 2 is equal to or greater than 80%. By comparting lines CS obtained by projecting sides of a regular dodecahedron, which is inscribed in the phantom sphere, onto the phantom sphere, a surface of the phantom sphere can be divided into 12 units Ut each of which meets the following mathematical formula (I): −2≦(Nt/12)−Nu≦2  (I), where Nt represents the total number of the dimples 10 and Nu represents the number of the dimples 10 on one unit.

Abstract translation: 高尔夫球2在其表面上具有大量凹坑10。 凹坑10的轮廓是非圆形的。 凹坑10的面积的标准偏差等于或小于1.7mm 2。 凹坑10的总面积相对于高尔夫球2的幻影球的表面积的比率等于或大于80％。 通过将通过将幻影球体内的正规十二面体的侧面突出而获得的线CS缩放到幻影球体上，将幻影球体的表面分成12个单位，其中每一个符合以下数学公式（I） ：-2＆nlE;（Nt / 12）-Nu＆nlE; 2（I）其中Nt表示凹坑10的总数，Nu表示一个单元上的凹坑10的数量。

公开(公告)号：US20150375053A1

公开(公告)日：2015-12-31

申请号：US14788311

申请日：2015-06-30

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kohei MIMURA ,  Takahiro SAJIMA

IPC: A63B37/00

CPC classification number: A63B37/0074 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0021 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0087 ,  A63B37/0089 ,  A63B37/009 ,  A63B37/0096

Abstract: A golf ball 2 includes a center 8, a mid layer 10, a cover 6 and dimples 12. The cover 6 has a Shore D hardness of 30-50. The golf ball 2 has an amount of compressive deformation of 3.0-5.0 mm. The ball 2 meets a mathematical formula (I): 0.80≦((L1+L2)/2)≦0.95  (I). L1 represents a ratio of a lift coefficient CL1 relative to a drag coefficient CD1, the lift coefficient CL1 and the drag coefficient CD1 being measured under conditions of a Reynolds number of 1.290×105 and a spin rate of 2820 rpm. L2 represents a ratio of a lift coefficient CL2 relative to a drag coefficient CD2, the lift coefficient CL2 and the drag coefficient CD2 being measured under conditions of a Reynolds number of 1.771×105 and a spin rate of 2940 rpm.

Abstract translation: 高尔夫球2包括中心8，中间层10，盖6和凹坑12.盖6的肖氏D硬度为30-50。 高尔夫球2的压缩变形量为3.0-5.0mm。 球2符合数学公式（I）：0.80＆nlE;（（L1 + L2）/ 2）＆nlE; 0.95（I）。 L1表示在雷诺数为1.290×105和旋转速度为2820rpm的条件下测量的升力系数CL1相对于阻力系数CD1，升力系数CL1和阻力系数CD1的比率。 L2表示在雷诺数为1.771×105和旋转速度为2940rpm的条件下测量的升力系数CL2相对于阻力系数CD2，升力系数CL2和阻力系数CD2的比率。

公开(公告)号：US20150182806A1

公开(公告)日：2015-07-02

申请号：US14583326

申请日：2014-12-26

Applicant: DUNLOP SPORTS CO., LTD.

Inventor： Takahiro SAJIMA ,  Kohei MIMURA

IPC: A63B37/00 ,  B05D5/02 ,  A63B45/00

CPC classification number: A63B37/0033 ,  A63B37/0004 ,  A63B37/0005 ,  A63B37/0022 ,  A63B37/0074 ,  A63B37/0075 ,  A63B37/0089 ,  A63B37/009 ,  A63B37/0096 ,  A63B45/00 ,  A63B45/02 ,  B05D5/02 ,  B05D2350/60

Abstract: A golf ball that enhances flight performance is provided. A golf ball according to the present invention includes a spherical core, at least one cover member that covers the core, and a coating layer that covers the cover member configuring the outermost layer. A plurality of dimples are formed in the cover member configuring the outermost layer. Roughness is formed on a surface of the coating layer such that a relationship between a drag coefficient CD1 and a lift coefficient CL1 when a golf ball is hit with a Reynolds number of 1.771×105 and a spin amount of 2280 rpm satisfies CD1×CL1

Abstract translation: 提供了一种提高飞行性能的高尔夫球。 根据本发明的高尔夫球包括球形芯，覆盖芯的至少一个盖构件和覆盖构成最外层的盖构件的涂层。 在构成最外层的盖构件中形成多个凹坑。 在涂层的表面上形成粗糙度，使得当雷诺数为1.771×105，旋转量为2280rpm的高尔夫球时，阻力系数CD1和升力系数CL1之间的关系满足CD1×CL1 < 0.0370。

公开(公告)号：US20130324321A1

公开(公告)日：2013-12-05

申请号：US13906839

申请日：2013-05-31

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takahiro SAJIMA ,  Hirotaka NAKAMURA

IPC: A63B37/00

CPC classification number: A63B37/0054 ,  A63B37/0003 ,  A63B37/0031 ,  A63B37/0032 ,  A63B37/0038 ,  A63B37/0044 ,  A63B37/0051 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0076 ,  A63B37/0092

Abstract: A golf ball 2 includes a spherical core 4 and a cover 6 covering the core 4. The cover 6 includes an inner cover 8 and an outer cover 10 positioned outside the inner cover 8. When distances (%) from a central point of the core 4 to nine points and hardnesses at the nine points, which nine points are obtained by dividing a region from the central point to a surface of the core 4 at intervals of 12.5% of a radius of the core 4, are plotted in a graph, R2 of a linear approximation curve obtained by a least-square method is 0.95 or greater. A hardness of an innermost layer of the cover 6 is greater than a surface hardness of the core 4. Preferably, the core is obtained by a rubber composition being crosslinked. The rubber composition includes an acid and/or a salt (d).

Abstract translation: 高尔夫球2包括球形芯4和覆盖芯4的盖6.盖6包括内盖8和位于内盖8外侧的外盖10.当距芯的中心点的距离（％） 在9点的4〜9点和硬度，通过将核心4的中心点的区域以芯体4的半径的12.5％的间隔分割，得到9点， 通过最小二乘法得到的线性近似曲线的R2为0.95以上。 盖6的最内层的硬度大于芯体4的表面硬度。优选地，芯是通过交联的橡胶组合物获得的。 橡胶组合物包括酸和/或盐（d）。