公开(公告)号：US20160310800A1

公开(公告)日：2016-10-27

申请号：US15139113

申请日：2016-04-26

Applicant: Dunlop Sports Co. Ltd.

Inventor： Hironori TAKIHARA ,  Kosuke TACHIBANA ,  Takahiro SAJIMA ,  Kohei MIMURA

IPC: A63B37/00

CPC classification number: A63B37/0092 ,  A63B37/0031 ,  A63B37/0032 ,  A63B37/0033 ,  A63B37/0039 ,  A63B37/0043 ,  A63B37/0044 ,  A63B37/0045 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0064 ,  A63B37/0075 ,  A63B37/0076

Abstract: An object of the present invention is to provide a golf ball traveling a great distance on driver shots and on iron shots. The present invention provides a golf ball comprising a spherical core including an inner layer and an outer 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 thickness of the cover is 3 mm or less, a difference (Hc−Hx+y) between a hardness (Hc) of the cover and the surface hardness (HX+Y) of the spherical core is 2 or more in Shore C hardness, 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射击和铁杆射击上行进很远距离的高尔夫球。 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和盖，其中，在向外的点处的硬度（HX + 1）之间的差异（HX + 1-HX-1） 从球形芯的内层和外层之间的边界的径向方向为1mm，并且在径向方向上从内层和外层之间的边界向内的点处的硬度（HX-1） 球状芯的肖氏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，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，盖的厚度为3mm以下，差（Hc-Hx + （Hc）与球形芯的表面硬度（HX + Y）的肖氏C硬度为2以上，y e盖在高尔夫球的构成部件中具有最高的硬度。

公开(公告)号：US20160184648A1

公开(公告)日：2016-06-30

申请号：US14933192

申请日：2015-11-05

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kohei MIMURA ,  Takahiro SAJIMA ,  Hironori TAKIHARA

IPC: A63B37/00

CPC classification number: A63B37/0021 ,  A63B37/0006 ,  A63B37/0012 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0029 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/004 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0047 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/0077 ,  A63B37/0092

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%. A ratio PL of a sum of areas of all the large dimples 10L to the surface area of the phantom sphere is equal to or greater than 79.0%. A degree G of uniformity of areas of the large dimples 10L is equal to or less than 1.15.

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％。 所有大凹坑10L的面积和幻影球面的面积之和的比率PL等于或大于79.0％。 大凹坑10L的区域的均匀度G等于或小于1.15。

公开(公告)号：US20160059081A1

公开(公告)日：2016-03-03

申请号：US14839387

申请日：2015-08-28

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kohei MIMURA ,  Takahiro SAJIMA

IPC: 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：US20150375058A1

公开(公告)日：2015-12-31

申请号：US14752421

申请日：2015-06-26

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kazuya KAMINO ,  Kosuke TACHIBANA ,  Takahiro SAJIMA

IPC: A63B37/00

CPC classification number: A63B37/0086 ,  A63B37/0006 ,  A63B37/0012 ,  A63B37/0013 ,  A63B37/0021 ,  A63B37/0022 ,  A63B37/0029 ,  A63B37/0033 ,  A63B37/0037 ,  A63B37/004 ,  A63B37/0045 ,  A63B37/0049 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/0077

Abstract: A golf ball 2 includes a core 4, a mid layer 6, a cover 8 and a paint layer 10. The core 4 includes a center 12 and an envelope layer 14. The golf ball 2 satisfies the following mathematical formulas. In the mathematical formulas, Tm represents a thickness of the mid layer, Tcmin represents a minimum thickness of the cover, Tcmax represents a maximum thickness of the cover, and Tp represents a thickness of the paint layer. The golf ball 2 has a large number of dimples 16 on a surface thereof. The number of planes that can divide a pattern of the dimples so that divided patterns are mirror symmetry to each other is one. Tm>Tcmax≧Tcmin>Tp (Tcmas−Tcmin)≦0.15 mm 0.15≧(Tp/Tcmin)≦0.04

Abstract translation: 高尔夫球2包括芯4，中间层6，盖8和涂料层10.芯4包括中心12和包层14.高尔夫球2满足以下数学公式。 在数学式中，Tm表示中间层的厚度，Tcmin表示覆盖层的最小厚度，Tcmax表示覆盖层的最大厚度，Tp表示涂料层的厚度。 高尔夫球2在其表面上具有大量凹坑16。 可以分割凹坑图案的平面数量使得分割图案彼此镜像对称。 Tm>Tcmax≥Tcmin> Tp（Tcmas-Tcmin）＆nlE; 0.15mm0.15≥（Tp / Tcmin）＆nlE; 0.04

公开(公告)号：US20150375049A1

公开(公告)日：2015-12-31

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: A63B37/00

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。 高尔夫球满足以下数学公式（I）：1.320＆nlE; L1＆nlE; 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 2820rpm，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：US20150375047A1

公开(公告)日：2015-12-31

申请号：US14752491

申请日：2015-06-26

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takahiro SAJIMA ,  Kohei MIMURA

IPC: A63B37/00

CPC classification number: A63B37/0006 ,  A63B37/0004 ,  A63B37/0016 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/002 ,  A63B37/0021 ,  A63B37/0077

Abstract: A golf ball 2 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 high-latitude region 14 has a latitude range of 40° or greater but 90° or less. The mid-latitude region 18 has a latitude range of 20° or greater but less than 40°. The low-latitude region 16 has a latitude range of 0° or greater but less than 20°. 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.

Abstract translation: 高尔夫球2在其表面上包括大量凹坑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.高纬度区域14具有纬度范围 40°以上但90°以下。 中纬度区域18的纬度范围为20°以上但小于40°。 低纬度区域16的纬度范围为0°以上但小于20°。 可以分割半球的凹坑图案的平面数量，使得分开的凹坑图案彼此镜像对称。 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。

公开(公告)号：US20130324319A1

公开(公告)日：2013-12-05

申请号：US13906493

申请日：2013-05-31

Applicant: Dunlop Sports Co., Ltd.

Inventor： Takahiro SAJIMA

IPC: A63B37/00

CPC classification number: A63B37/0039 ,  A63B37/0031 ,  A63B37/0045 ,  A63B37/0051 ,  A63B37/0063 ,  A63B37/0076 ,  A63B37/0092 ,  A63B37/0096 ,  C08K5/098 ,  C08K5/14 ,  C08L9/00 ,  C08L23/0807 ,  C08L23/0869 ,  C08L23/0876 ,  C08L21/00

Abstract: An object of the present invention is to provide a golf ball having a novel core structure and traveling a great flight distance on driver shots. The present invention provides a golf ball comprising a core composed of a spherical center and an envelope layer and at least one cover layer disposed outside the core, wherein the spherical center has an internal hardness difference between a maximum hardness and a minimum hardness of less than 5 in JIS-C hardness, the envelope layer is formed from an envelope rubber composition containing (a) a base rubber, (b) an α,β-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) an crosslinking initiator and (d) an acid and/or a salt thereof, and the outermost cover layer 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具有新颖的核心结构的高尔夫球，并且在驾驶员镜头上行驶大飞行距离。 本发明提供了一种高尔夫球，其包括由球形中心和包层组成的芯和设置在芯外部的至少一个覆盖层，其中球形中心具有最大硬度和最小硬度之间的内部硬度差小于 5的JIS-C硬度，包层由包含（a）基础橡胶，（b）具有3-8个碳原子的α，β-不饱和羧酸和/或其金属盐的包络橡胶组合物形成为 共交联剂，（c）交联引发剂和（d）酸和/或其盐，并且最外覆盖层在高尔夫球的构成成分中具有最高的硬度。

公开(公告)号：US20180169481A1

公开(公告)日：2018-06-21

申请号：US15785109

申请日：2017-10-16

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takahiro SAJIMA ,  Hironori TAKIHARA

IPC: A63B37/00 ,  C08K13/02 ,  C08L33/02

CPC classification number: A63B37/0087 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0064 ,  A63B37/0065 ,  A63B37/0067 ,  A63B37/0074 ,  A63B37/0088 ,  C08K3/013 ,  C08K3/22 ,  C08K5/14 ,  C08K13/02 ,  C08K2003/3045 ,  C08L33/02 ,  C08L2205/03

Abstract: A golf ball 2 includes a core 4 and a cover 6. A difference (FB2−FC2) between a secondary natural frequency FB2 of the golf ball 2 and a secondary natural frequency FC2 of the core 4 is greater than 420 Hz and not greater than 760 Hz. Preferably, a sum (FB2+FC2) is not greater than 5200 Hz. Preferably, the FC2 is not less than 1700 Hz and not greater than 2400 Hz. Preferably, the FB2 is not less than 2250 Hz and not greater than 3050 Hz. Preferably, an amount of compressive deformation Dc of the core 4 is 2.30 to 3.90 mm. Preferably, an amount of compressive deformation Db of the golf ball 2 is 1.80 to 3.30 mm. Preferably, a thickness Tc of the cover 6 is 1.00 to 2.30 mm. Preferably, a Shore D hardness Hc of the cover 6 is 54 to 67.

公开(公告)号：US20180161634A1

公开(公告)日：2018-06-14

申请号：US15728982

申请日：2017-10-10

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hironori TAKIHARA ,  Takahiro SAJIMA

IPC: A63B37/00

CPC classification number: A63B37/0092 ,  A63B37/00 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0039 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0062 ,  A63B37/0064 ,  A63B37/0067 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/0096

Abstract: A golf ball 2 includes a core 4, a mid layer 6 positioned outside this core, and a cover 8 positioned outside this mid layer. When a total thickness of the mid layer 6 and the cover 8 is denoted by L (mm), a Shore C hardness at a point A away from a surface of the core 4 toward a central point of the core 4 by 5L (mm) is denoted by Ha, a Shore C hardness at a point B away from the surface of the core 4 toward the central point of the core 4 by 2.5L (mm) is denoted by Hb, and a Shore C hardness at the central point of the core 4 and Shore C hardnesses of the mid layer 6 and the cover 8 are denoted by H0, Hm, and Hc, respectively; the golf ball 2 satisfies Hc−Hb>0, Hm−H0>0, and Ha−Hm>0.

公开(公告)号：US20180140904A1

公开(公告)日：2018-05-24

申请号：US15874628

申请日：2018-01-18

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.