公开(公告)号：US20180161632A1

公开(公告)日：2018-06-14

申请号：US15714378

申请日：2017-09-25

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hironori TAKIHARA ,  Takahiro SAJIMA ,  Kohei MIMURA

IPC: A63B37/00 ,  A63B45/00

CPC classification number: A63B37/0012 ,  A63B37/00 ,  A63B37/0006 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0064 ,  A63B37/0066 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/008 ,  A63B37/0083 ,  A63B37/0092 ,  A63B45/00

Abstract: A golf ball includes a core, one or more mid layers, a cover, and dimples. A central hardness Ho and a surface hardness Hs of the core, a hardness Hm(min) of a layer having a lowest hardness among the mid layers, and a hardness Hc of the cover satisfy the following mathematical formulas (i) to (iv). Hs−Ho>15  (i) Hc−Hm(min)>20  (ii) −10

公开(公告)号：US20170173400A1

公开(公告)日：2017-06-22

申请号：US15353864

申请日：2016-11-17

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takahiro SAJIMA ,  Hironori TAKIHARA

IPC: A63B37/00 ,  A63B45/00

CPC classification number: A63B37/0074 ,  A63B37/0012 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/0021 ,  A63B37/0031 ,  A63B37/0032 ,  A63B37/0033 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0065 ,  A63B37/0087 ,  A63B45/00 ,  A63B2037/0079

Abstract: A golf ball 2 includes a core 4 and a cover 6. An amount of compressive deformation Df of the core 4 is equal to or greater than 4.1 mm. A nominal thickness T of the cover 6 is equal to or less than 1.70 mm. The golf ball 2 has a plurality of dimples 8 on a surface thereof. A value V calculated by the following mathematical formula is equal to or less than 290. V=N*So/Bb In the mathematical formula, N represents a total number of the dimples 8, So represents a ratio of a total area of all the dimples 8 relative to a surface area of a phantom sphere of the golf ball 2, and Bb represents an average (mm) of thicknesses B of the cover 6 immediately below deepest points of the dimples 8.

公开(公告)号：US20160184653A1

公开(公告)日：2016-06-30

申请号：US14878605

申请日：2015-10-08

Applicant: DUNLOP SPORTS CO, LTD.

Inventor： Takahiro SAJIMA

IPC: A63B37/00 ,  B29C70/68 ,  B29C37/00 ,  B29C70/70

CPC classification number: A63B37/0031 ,  A63B37/0022 ,  A63B37/0075 ,  A63B37/14 ,  B29C70/683 ,  B29C70/70 ,  B29D99/0042 ,  B29K2995/007 ,  B29L2031/546 ,  B32B1/00 ,  B32B25/08 ,  B32B25/12 ,  B32B25/16 ,  B32B27/08 ,  B32B27/302 ,  B32B27/308 ,  B32B27/32 ,  B32B27/34 ,  B32B27/36 ,  B32B27/40 ,  B32B2255/10 ,  B32B2264/02 ,  B32B2264/107 ,  B32B2264/12 ,  B32B2270/00 ,  B32B2274/00 ,  B32B2307/536 ,  B32B2307/538 ,  B32B2307/72 ,  B32B2307/732 ,  C08L75/00 ,  C08L75/04

Abstract: A golf ball of one aspect of the present invention includes a spherical core, one or more cover members to cover the core, and a coating layer to coat a cover member configuring an outermost layer of the one or more cover members. A plurality of dimples is formed in the cover member. Shore-D hardness of the cover member is equal to or larger than 50. A 10% modulus of the coating layer is equal to or smaller than 160 kgf/cm2. Roughness is produced on a surface of the coating layer after applying a coating material over the cover member of the outermost layer A maximum height Rz of the coating layer is equal to or larger than 3 μm.

Abstract translation: 本发明的一个方面的高尔夫球包括球形芯，覆盖芯的一个或多个盖构件，以及涂覆构成一个或多个覆盖构件的最外层的覆盖构件的涂层。 多个凹坑形成在盖构件中。 盖构件的肖氏-D硬度等于或大于50.涂层的10％模量等于或小于160kgf / cm 2。 在涂层材料涂覆在最外层的覆盖部件上之后，在涂层的表面上产生粗糙度。涂层的最大高度Rz等于或大于3μm。

公开(公告)号：US20150182805A1

公开(公告)日：2015-07-02

申请号：US14583313

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: A63B37/0022 ,  A63B37/0004 ,  A63B37/0029 ,  A63B37/0033 ,  A63B37/0074 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/14 ,  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. The thickness of the coating layer is 5.0 μm or more. Roughness is formed on the surface of the coating layer after coating the cover member configuring the outermost layer. The maximum height Rz and the arithmetic average roughness Ra of the surface of the coating layer satisfy the relationship Rz≧Ra×6.0.

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。 涂层的厚度为5.0μm以上。 在涂覆构成最外层的覆盖构件之后，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。

公开(公告)号：US20180028873A1

公开(公告)日：2018-02-01

申请号：US15624328

申请日：2017-06-15

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Hironori TAKIHARA ,  Takahiro SAJIMA ,  Kohei MIMURA

IPC: A63B37/00

CPC classification number: A63B37/0092 ,  A63B37/0006 ,  A63B37/0012 ,  A63B37/0017 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0021 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0043 ,  A63B37/0045 ,  A63B37/0062 ,  A63B37/0063 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/008 ,  A63B37/0094 ,  A63B37/0096

Abstract: A golf ball 2 includes a core 4, one or more mid layers 6, a cover 8, and dimples 10. A central hardness Ho and a surface hardness Hs of the core 4, a hardness Hm(min) of a layer having a lowest hardness among the mid layers 6, and a hardness Hc of the cover 8 satisfy the following mathematical formulas (1) to (4). Hs−Ho>15  (1) Hc−Hm(min)>20  (2) −10

公开(公告)号：US20160263442A1

公开(公告)日：2016-09-15

申请号：US15163022

申请日：2016-05-24

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takahiro SAJIMA ,  Kohei MIMURA

IPC: A63B37/00 ,  B05D5/02 ,  A63B37/14

CPC classification number: A63B37/0022 ,  A63B37/0004 ,  A63B37/0015 ,  A63B37/0029 ,  A63B37/0033 ,  A63B37/0074 ,  A63B37/0075 ,  A63B37/0076 ,  A63B37/14 ,  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. The thickness of the coating layer is 5.0 μm or more. Roughness is formed on the surface of the coating layer after coating the cover member configuring the outermost layer. The maximum height Rz and the arithmetic average roughness Ra of the surface of the coating layer satisfy the relationship Rz≧Ra×6.0.

公开(公告)号：US20140128179A1

公开(公告)日：2014-05-08

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: A63B37/00

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：US20130196791A1

公开(公告)日：2013-08-01

申请号：US13723937

申请日：2012-12-21

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takahiro SAJIMA ,  Kazuhiko ISOGAWA ,  Kosuke TACHIBANA ,  Hidetaka INOUE

IPC: A63B37/00

CPC classification number: A63B37/0021 ,  A63B37/0004 ,  A63B37/0006 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/002

Abstract: A golf ball 2 has a large number of dimples 10 on a surface thereof. The golf ball 2 meets the following mathematical formula (I): Y≦3.8*X−2.894   (I), where X represents a ratio of a sum of areas of all the dimples 10 to a surface area of a phantom sphere of the golf ball, and Y represents a standard deviation (mm) of diameters of all the dimples 10.

Abstract translation: 高尔夫球2在其表面上具有大量凹坑10。 高尔夫球2符合以下数学公式（I）：Y@3.8*X-2.894（I），其中X表示所有凹坑10的面积之和与高尔夫球体的表面积的比率 球，Y表示所有凹坑10的直径的标准偏差（mm）。

公开(公告)号：US20180169482A1

公开(公告)日：2018-06-21

申请号：US15814037

申请日：2017-11-15

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Takahiro SAJIMA ,  Hironori TAKIHARA

IPC: A63B37/00

CPC classification number: A63B37/0088 ,  A63B37/0031 ,  A63B37/0033 ,  A63B37/0065 ,  A63B37/0074 ,  A63B37/0087 ,  A63B2037/0079

Abstract: A golf ball includes a core and a cover. A difference (FB2−FC2) between a secondary natural frequency FB2 of the golf ball and a secondary natural frequency FC2 of the core is not less than 80 Hz and not greater than 420 Hz. The golf ball having a sum (FB2+FC2) of not less than 4000 Hz is preferable. Preferably, the FC2 is not less than 1800 Hz and not greater than 2500 Hz. Preferably, the FB2 is not less than 2000 Hz and not greater than 2800 Hz. Preferably, an amount of compressive deformation Dc is 2.30 mm to 3.90 mm. Preferably, an amount of compressive deformation Db is 1.80 mm to 3.30 mm. Preferably, a thickness Tc is 0.80 mm to 2.10 mm. Preferably, a Shore D hardness Hc is not less than 52 and not greater than 65.

公开(公告)号：US20180161629A1

公开(公告)日：2018-06-14

申请号：US15719006

申请日：2017-09-28

Applicant: DUNLOP SPORTS CO. LTD.

Inventor： Kohei MIMURA ,  Takahiro SAJIMA

IPC: A63B37/00

CPC classification number: A63B37/0004 ,  A63B37/0006 ,  A63B37/0012 ,  A63B37/0017 ,  A63B37/0018 ,  A63B37/0019 ,  A63B37/002 ,  A63B37/0033 ,  A63B37/0035 ,  A63B37/0045 ,  A63B37/0047 ,  A63B37/0064 ,  A63B37/008 ,  A63B45/00

Abstract: A golf ball 2 has a large number of dimples 10 on a surface thereof. Fifteen axes are assumed for a phantom sphere of the golf ball 2. 30240 points on a predetermined region of the surface of the golf ball 2 during backspin about each axis are determined. A length L1 of a perpendicular line that extends from each point to the axis is calculated. A total length L2 is calculated by summing 21 lengths L1 calculated based on 21 perpendicular lines arranged in a direction of the axis. A transformed data constellation is obtained by performing Fourier transformation on a data constellation of 1440 total lengths L2 calculated along a direction of rotation about the axis. A peak value and an order of a maximum peak of the transformed data constellation are calculated. A minimum value of 15 peak values is not less than 95 mm.