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公开(公告)号：US10010761B2
公开(公告)日：2018-07-03
申请号：US15178179
申请日：2016-06-09
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Hyoungchol Kim , Masahide Onuki , Takahiro Sajima , Kohei Mimura
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.
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公开(公告)号：US09789369B2
公开(公告)日：2017-10-17
申请号：US15139113
申请日：2016-04-26
Applicant: Dunlop Sports Co. Ltd.
Inventor： Hironori Takihara , Kosuke Tachibana , Takahiro Sajima , Kohei Mimura
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.
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公开(公告)号：US09375611B2
公开(公告)日：2016-06-28
申请号：US14583313
申请日：2014-12-26
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takahiro Sajima , Kohei Mimura
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。
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公开(公告)号：US09931542B2
公开(公告)日：2018-04-03
申请号：US15645144
申请日：2017-07-10
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Hidetaka Inoue , Kazuya Kamino , Kohei Mimura , Toshiyuki Tarao , Mami Tanaka
CPC classification number: A63B37/0012 , A63B37/0003 , A63B37/0006 , A63B37/0017 , A63B37/0018 , A63B37/0019 , A63B37/002 , A63B37/0021 , A63B37/0022 , A63B37/0038
Abstract: A golf ball 2 includes a main body 4 and a paint film 6. The paint film 6 includes an inner layer 14 and an outer layer 16. A modulus Min of the inner layer 14 is higher than a modulus Mout of the outer layer 16. A difference (Min−Mout) is not less than 25 kgf/cm2. The golf ball 2 has a plurality of dimples 18. A ratio So of a sum of areas of the dimples 18 relative to a surface area of a phantom sphere of the golf ball 2 and a ratio Rs of a number of the dimples 18 each having a diameter of not less than 9.60% and not greater than 10.37% of a diameter of the golf ball 2, relative to a total number of the dimples 18, satisfy the following mathematical formula (1). Rs≥−2.5*So+273 (1)
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公开(公告)号：US09849340B2
公开(公告)日：2017-12-26
申请号：US14856721
申请日：2015-09-17
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Kohei Mimura , Takahiro Sajima , Hyoungchol Kim
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.
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Patent Agency Ranking
公开(公告)号：US09707452B2
公开(公告)日：2017-07-18
申请号：US14919303
申请日：2015-10-21
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Kohei Mimura , Takahiro Sajima
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
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公开(公告)号：US09914021B2
公开(公告)日：2018-03-13
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.
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公开(公告)号：US09750982B2
公开(公告)日：2017-09-05
申请号：US14933192
申请日：2015-11-05
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Kohei Mimura , Takahiro Sajima , Hironori Takihara
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.
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公开(公告)号：US10507361B2
公开(公告)日：2019-12-17
申请号：US15663036
申请日：2017-07-28
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takahiro Sajima , Kohei Mimura
Abstract: A golf ball has a plurality of dimples 12 and a land 14 on a surface thereof. The golf ball further has a large number of minute projections 18 formed on surfaces of the dimples 12 and the land 14. An average pitch Pav of these minute projections 18 is less than 100 μm. An average height Hav of these minute projections 18 is not less than 0.5 μm and not greater than 50 μm. The golf ball satisfies the following mathematical formula. Lav
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公开(公告)号：US09975004B2
公开(公告)日：2018-05-22
申请号：US14752491
申请日：2015-06-26
Applicant: DUNLOP SPORTS CO. LTD.
Inventor： Takahiro Sajima , Kohei Mimura
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.
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