公开(公告)号：US20170259138A1

公开(公告)日：2017-09-14

申请号：US15457146

申请日：2017-03-13

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hirotaka NAKAMURA

IPC: A63B53/10

CPC classification number: A63B53/10 ,  A63B2209/02

Abstract: A shaft 6 includes a plurality of layers formed by fiber reinforced resins. The layers include a hoop layer and bias layers. The hoop layer includes a full length hoop layer s9 constituted with a prepreg having a fiber elastic modulus of equal to or greater than 30 (tf/mm2) and having a fiber weight per unit area of equal to or greater than 50 (g/m2) but equal to or less than 80 (g/m2). The bias layers s2, s3, s4, and s5 include high elasticity containing bias layers s4 and s5 constituted with a prepreg contacting a high elastic pitch-based carbon fiber having a fiber elastic modulus of equal to or greater than 80 (tf/mm2). Preferably, the full length hoop layer s9 is disposed outside the high elasticity containing bias layers s4 and s5.

公开(公告)号：US20180071598A1

公开(公告)日：2018-03-15

申请号：US15688160

申请日：2017-08-28

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hirotaka NAKAMURA

IPC: A63B53/10

CPC classification number: A63B53/10 ,  A63B60/42 ,  A63B2060/002 ,  A63B2209/023

Abstract: An EI value at a point P16 separated by 16 inches from a tip end Tp is defined as E16, a shaft wall thickness at the point P16 is defined as T16, an EI value at a point P6 separated by 6 inches from the tip end Tp is defined as E6, and a shaft wall thickness at the point P6 is defined as T6. In a shaft 6, E16 is 2.4 (kgf·m2) or more, E6 is 2.7 (kgf·m2) or less, and E16/E6 is 0.95 or more but 1.50 or less, E6/T6 is 1.9 or less, and E16/T16 is 3.0 or more. A high-elasticity partial reinforcement layer including a fiber having a tensile elastic modulus of 30 (t/mm2) or more but 40 (t/mm2) or less is disposed in at least a part of a region falling within a range of ±4 inches from the point P16.

公开(公告)号：US20150038254A1

公开(公告)日：2015-02-05

申请号：US14447119

申请日：2014-07-30

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hirotaka NAKAMURA

IPC: A63B53/10

CPC classification number: A63B60/00 ,  A63B53/10 ,  A63B60/42 ,  A63B2209/02 ,  A63B2209/023

Abstract: A shaft 6 is formed by a plurality of prepreg sheets s1, s2, s3, s4, s5, s6, s7, s8 and s9. These prepreg sheets include full length sheets and partial sheets partially provided in the axial direction of the shaft. The full length sheets include a full length hoop sheet s7. The partial sheets include glass fiber reinforced sheets s1, s4. In the shaft 6, a volume ratio Vf of the hoop layer in a specific tip part Tx is equal to or greater than 2.5% and less than 10%. The shaft 6 is lightweight and has a high degree of design freedom of a position of a center of gravity. The shaft 6 is excellent in strength of a tip part.

Abstract translation: 轴6由多个预浸料片s1，s2，s3，s4，s5，s6，s7，s8和s9形成。 这些预浸料片材包括全长片材和部分片材，其部分地设置在轴的轴向方向上。 全长床单包括全长的箍板s7。 部分片材包括玻璃纤维增​​强片材s1，s4。 在轴6中，特定尖端部Tx中的箍层的体积比Vf为2.5％以上且小于10％。 轴6重量轻并且具有高重心位置的高度设计自由度。 轴6的尖端部的强度优异。

公开(公告)号：US20140106903A1

公开(公告)日：2014-04-17

申请号：US14055482

申请日：2013-10-16

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hirotaka NAKAMURA

IPC: A63B53/04

CPC classification number: A63B53/0466 ,  A63B60/02 ,  A63B60/54 ,  A63B2053/0408 ,  A63B2053/0433 ,  A63B2053/0437 ,  A63B2053/045 ,  A63B2053/0462 ,  A63B2053/0491

Abstract: A golf club head has a hollow and comprises a face portion having a club face for hitting a ball, a sole portion defining a bottom face of the club head, and a hosel into which a tip end of a golf club shaft is inserted. The hosel protrudes into the hollow. The sole portion is provided in its club face side with a thick ribbed part having a thickness of from 3.0 to 10.0 mm and extending in the toe-heel direction of the head. In the hollow, the ribbed part is connected to the hosel.

Abstract translation: 高尔夫球杆头具有中空部，并且包括具有用于击球的球杆面的面部，限定球杆头的底面的底部，以及插入高尔夫球杆杆的前端的插鞘。 插鞘突出到空洞中。 鞋底部分在其球杆面侧设置有厚度为3.0至10.0mm并且在头部的脚跟方向上延伸的厚肋状部分。 在空心中，肋状部分连接到插鞘。

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）。

公开(公告)号：US20160184671A1

公开(公告)日：2016-06-30

申请号：US14955695

申请日：2015-12-01

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hirotaka NAKAMURA

IPC: A63B53/10

CPC classification number: A63B53/10 ,  A63B53/12 ,  A63B60/42 ,  A63B2209/02 ,  A63B2209/023 ,  A63B2209/026

Abstract: A shaft 6 includes at least two hoop layers s3 and s8, at least one bias layer, and at least one straight layer. An interposition layer other than the hoop layer is present between every opposing hoop layers. An average thickness of the opposing hoop layers is defined as t, and a total thickness of the interposition layer is defined as T. The shaft 6 satisfies the following formula (1): T/t≧1.9  (1).

Abstract translation: 轴6包括至少两个箍层s3和s8，至少一个偏置层和至少一个直层。 在每个相对的箍层之间存在除箍层之外的插入层。 相对环层的平均厚度定义为t，并且插入层的总厚度定义为T.轴6满足下式（1）：T /t≥1.9（1）。

公开(公告)号：US20150094160A1

公开(公告)日：2015-04-02

申请号：US14504102

申请日：2014-10-01

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hirotaka NAKAMURA ,  Hiroshi HASEGAWA

IPC: A63B53/10

CPC classification number: A63B60/00 ,  A63B53/10 ,  A63B2209/023

Abstract: A shaft 6 includes a plurality of fiber reinforced resin layers s1 to s10. The plurality of layers include a first straight layer s1 in which a 0°-compression strength is the minimum and a second straight layer s9 in which a 0°-compression strength is the maximum. A specific tip part Tx which is a region between a tip end Tp and a position separated by 100 mm from the tip end Tp satisfies the following (a) to (c): (a) the first straight layer forms a innermost layer; (b) the second straight layer is arranged outside a central position in a thickness direction; and (c) when a 0°-compression strength of the first straight layer is defined as Cmin and a 0°-compression strength of the second straight layer is defined as Cmax, a difference (Cmax−Cmin) is equal to or greater than 550 MPa.

Abstract translation: 轴6包括多个纤维增强树脂层s1至s10。 多个层包括0°压缩强度最小的第一直线层s1和0°压缩强度最大的第二直线层s9。 作为尖端Tp与从前端Tp分离100mm的位置之间的区域的特定末端部分Tx满足以下（a）〜（c）：（a）第一直线层形成最内层; （b）第二直层布置在厚度方向的中心位置的外侧; 和（c）当第一直层的0°压缩强度定义为Cmin，将第二直线层的0°压缩强度定义为Cmax时，差（Cmax-Cmin）等于或大于 550MPa。

公开(公告)号：US20130303308A1

公开(公告)日：2013-11-14

申请号：US13947615

申请日：2013-07-22

Applicant: Dunlop Sports Co., Ltd.

Inventor： Kazuhiko ISOGAWA ,  Tsutomu HIRAU ,  Hirotaka NAKAMURA ,  Takahiro SHIGEMITSU

IPC: A63B37/00

CPC classification number: A63B37/0039 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0035 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0047 ,  A63B37/0062 ,  A63B37/0064 ,  A63B37/0066 ,  A63B37/0091 ,  A63B37/0092

Abstract: A first golf ball 2 includes a core 4, a mid-layer 6, and a cover 8. The core 4 includes a center 10 and an envelope layer 12. The mid-layer 6 includes a metal ion source (C) that can neutralize an ionomer resin. The mid-layer 6 has a melt flow rate (at 190° C. and 2.16 kg) of 4 g/10 minute or greater. The difference (H3−H1) between the JIS-C hardness H3 of the cover 8 and the JIS-C central hardness H1 of the center 10 is equal to or greater than 45. A second golf ball 22 includes a core 24, a mid-layer 28, and a cover 30. The mid-layer 28 has a melt flow rate (at 190° C. and 2.16 kg) of 4 g/10 minute or greater. Preferably, the mid-layer 28 includes a high melt viscosity resin (A), a low melt viscosity ionomer resin (B), and a metal ion source (C1).

Abstract translation: 第一高尔夫球2包括芯4，中间层6和盖8.芯4包括中心10和包层12.中间层6包括可以中和的金属离子源（C） 离聚物树脂。 中间层6具有4g / 10分钟或更高的熔体流动速率（190℃和2.16kg）。 盖8的JIS-C硬度H3与中心部10的JIS-C中央硬度H1之间的差（H3-H1）等于或大于45.第二高尔夫球22包括芯24， 层28和盖30.中间层28的熔体流动速率（在190℃和2.16kg）为4g / 10分钟或更大。 优选地，中间层28包括高熔体粘度树脂（A），低熔融粘度离聚物树脂（B）和金属离子源（C1）。