Patents by Inventor Hironori Takihara
Hironori Takihara has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11285363Abstract: A golf ball 2 includes a core 4 and a cover 6 positioned outside the core 4. The cover 6 is formed in a mold having support pins by injection molding. A ratio (V/S) of a volume V (mm3) of the cover 6 to an amount of compressive deformation S (mm) of the core 4 is not less than 1000 and not greater than 1900. The cover 6 has a shore D hardness of not greater than 62. The golf ball 2 has a plurality of dimples 8 on a surface thereof. A total volume W of these dimples is not less than 490 mm3 and not greater than 620 mm3. A ratio (?/P) of a latitude ? (degree) of each support pin to a total cross-sectional area P (mm2) of the support pins is not less than 0.35 and not greater than 0.60.Type: GrantFiled: April 14, 2020Date of Patent: March 29, 2022Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Sajima, Hironori Takihara
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Patent number: 11278768Abstract: An object of the present invention is to provide a golf ball traveling a great flight distance and having a good shot feeling on long iron shots. The present invention provides a golf ball comprising a core, at least one intermediate layer covering the core and a cover covering the intermediate layer, wherein the core is formed from a core rubber composition containing (a) a base rubber containing a polybutadiene, (b) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, and (d) a terpene-based resin, and a material hardness (Hm) of the intermediate layer is higher than a material hardness (Hc) of the cover, and the material hardness (Hc) of the cover is 50 or more in Shore D hardness.Type: GrantFiled: December 24, 2019Date of Patent: March 22, 2022Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hironori Takihara, Hikaru Nagakura, Kai Hayashi
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Patent number: 11266881Abstract: 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. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.Type: GrantFiled: November 9, 2020Date of Patent: March 8, 2022Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Sajima, Hironori Takihara, Toshiyuki Takubo
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Patent number: 11185744Abstract: An object of the present invention is to provide a golf ball traveling a great flight distance and having a good shot feeling and durability on driver shots. The present invention provides a golf ball comprising a core, at least one intermediate layer covering the core and a cover covering the intermediate layer, wherein the core is formed from a core rubber composition containing (a) a base rubber containing a polybutadiene, (b) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, and (d) a terpene-based resin, and a material hardness (Hm) of the intermediate layer and a material hardness (Hc) of the cover satisfy an equation of Hm?Hc.Type: GrantFiled: December 24, 2019Date of Patent: November 30, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hironori Takihara, Hikaru Nagakura, Kai Hayashi
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Patent number: 11167177Abstract: An object of the present invention is to provide a golf ball traveling a great flight distance and having a good shot feeling on long iron shots. The present invention provides a golf ball comprising a core, at least one intermediate layer covering the core and a cover covering the intermediate layer, wherein the core is formed from a core rubber composition containing (a) a base rubber containing a polybutadiene, (b) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, and (d) a terpene-based resin, and a material hardness (Hm) of the intermediate layer is higher than a material hardness (Hc) of the cover, and the material hardness (Hc) of the cover is less than 50 in Shore D hardness.Type: GrantFiled: December 24, 2019Date of Patent: November 9, 2021Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hidetaka Inoue, Hironori Takihara, Hikaru Nagakura, Kai Hayashi
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Publication number: 20210052949Abstract: 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. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.Type: ApplicationFiled: November 9, 2020Publication date: February 25, 2021Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro SAJIMA, Hironori TAKIHARA, Toshiyuki TAKUBO
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Patent number: 10864408Abstract: 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. The minute projections 18 are exposed on the surface of the golf ball. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. The surface of the golf ball has a maximum height Sz of not less than 5 ?m and not greater than 200 ?m.Type: GrantFiled: February 1, 2019Date of Patent: December 15, 2020Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Sajima, Hironori Takihara, Toshiyuki Takubo
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Patent number: 10864409Abstract: 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. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.Type: GrantFiled: February 11, 2019Date of Patent: December 15, 2020Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Sajima, Hironori Takihara, Toshiyuki Takubo
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Publication number: 20200238138Abstract: A golf ball 2 includes a core 4 and a cover 6 positioned outside the core 4. The cover 6 is formed in a mold having support pins by injection molding. A ratio (V/S) of a volume V (mm3) of the cover 6 to an amount of compressive deformation S (mm) of the core 4 is not less than 1000 and not greater than 1900. The cover 6 has a shore D hardness of not greater than 62. The golf ball 2 has a plurality of dimples 8 on a surface thereof. A total volume W of these dimples is not less than 490 mm3 and not greater than 620 mm3. A ratio (?/P) of a latitude ? (degree) of each support pin to a total cross-sectional area P (mm2) of the support pins is not less than 0.35 and not greater than 0.60.Type: ApplicationFiled: April 14, 2020Publication date: July 30, 2020Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Sajima, Hironori Takihara
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Publication number: 20200206576Abstract: An object of the present invention is to provide a golf ball traveling a great flight distance and having a good shot feeling and durability on driver shots. The present invention provides a golf ball comprising a core, at least one intermediate layer covering the core and a cover covering the intermediate layer, wherein the core is formed from a core rubber composition containing (a) a base rubber containing a polybutadiene, (b) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, and (d) a terpene-based resin, and a material hardness (Hm) of the intermediate layer and a material hardness (Hc) of the cover satisfy an equation of Hm?Hc.Type: ApplicationFiled: December 24, 2019Publication date: July 2, 2020Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hironori Takihara, Hikaru Nagakura, Kai Hayashi
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Publication number: 20200206573Abstract: An object of the present invention is to provide a golf ball traveling a great flight distance and having a good shot feeling on long iron shots. The present invention provides a golf ball comprising a core, at least one intermediate layer covering the core and a cover covering the intermediate layer, wherein the core is formed from a core rubber composition containing (a) a base rubber containing a polybutadiene, (b) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, and (d) a terpene-based resin, and a material hardness (Hm) of the intermediate layer is higher than a material hardness (Hc) of the cover, and the material hardness (Hc) of the cover is 50 or more in Shore D hardness.Type: ApplicationFiled: December 24, 2019Publication date: July 2, 2020Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hironori Takihara, Hikaru Nagakura, Kai Hayashi
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Publication number: 20200206574Abstract: An object of the present invention is to provide a golf ball traveling a great flight distance and having a good shot feeling on long iron shots. The present invention provides a golf ball comprising a core, at least one intermediate layer covering the core and a cover covering the intermediate layer, wherein the core is formed from a core rubber composition containing (a) a base rubber containing a polybutadiene, (b) an ?,?-unsaturated carboxylic acid having 3 to 8 carbon atoms and/or a metal salt thereof as a co-crosslinking agent, (c) a crosslinking initiator, and (d) a terpene-based resin, and a material hardness (Hm) of the intermediate layer is higher than a material hardness (Hc) of the cover, and the material hardness (Hc) of the cover is less than 50 in Shore D hardness.Type: ApplicationFiled: December 24, 2019Publication date: July 2, 2020Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hidetaka Inoue, Hironori Takihara, Hikaru Nagakura, Kai Hayashi
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Patent number: 10525308Abstract: A golf ball has a main body 12 and a paint layer 10 positioned outside the main body 12. The main body 12 has a plurality of minute projections 18 on a surface thereof. The paint layer 10 has a thickness Tp of not less than 5 ?m and not greater than 30 ?m. Each minute projection 18 is embedded in the paint layer 10. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 80% of the thickness Tp. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.Type: GrantFiled: February 11, 2019Date of Patent: January 7, 2020Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Sajima, Hironori Takihara, Toshiyuki Takubo
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Patent number: 10434372Abstract: 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.Type: GrantFiled: November 17, 2016Date of Patent: October 8, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Sajima, Hironori Takihara
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Publication number: 20190269979Abstract: 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. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 50 ?m. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.Type: ApplicationFiled: February 11, 2019Publication date: September 5, 2019Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro SAJIMA, Hironori TAKIHARA, Toshiyuki TAKUBO
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Publication number: 20190269974Abstract: 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. The minute projections 18 are exposed on the surface of the golf ball. The surface of the golf ball has an arithmetic average height Sa of not less than 0.5 ?m and not greater than 30 ?m. The surface of the golf ball has a maximum height Sz of not less than 5 ?m and not greater than 200 ?m.Type: ApplicationFiled: February 1, 2019Publication date: September 5, 2019Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Sajima, Hironori Takihara, Toshiyuki Takubo
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Publication number: 20190269975Abstract: A golf ball has a main body 12 and a paint layer 10 positioned outside the main body 12. The main body 12 has a plurality of minute projections 18 on a surface thereof. The paint layer 10 has a thickness Tp of not less than 5 ?m and not greater than 30 ?m. Each minute projection 18 is embedded in the paint layer 10. An average value Hav of heights H of the minute projections 18 is not less than 0.5 ?m and not greater than 80% of the thickness Tp. A ratio Pp of a sum of areas of all the minute projections 18 to a surface area of a phantom sphere of the golf ball is not less than 7%. An average value Dav of diameters D of the minute projections 18 is not less than 5 ?m and not greater than 50 ?m.Type: ApplicationFiled: February 11, 2019Publication date: September 5, 2019Applicant: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro SAJIMA, Hironori TAKIHARA, Toshiyuki TAKUBO
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Patent number: 10343020Abstract: A golf ball (2) includes a core (4), an inner cover (6), a main cover (8), and an outer cover (10). X=Hc×Rc×0.05, S=Hs×Rc×0.05, M=Hm×Tm, I=Hi×Ti, O=Ho×To, and Q=(I+O)/2 that are calculated from a radius Rc of the core (4), a Shore C hardness Hc at a central point of the core (4), a Shore C hardness Hs at a surface of the core (4), a thickness Tm of the main cover (8), a Shore C hardness Hm of the main cover (8), a thickness Ti of the inner cover (6), a Shore C hardness Hi of the inner cover (6), a thickness To of the outer cover (10) and a Shore C hardness Ho of the outer cover (10), satisfy 15?M?S?100, 0.25<Q/M<0.5, ?10?I?O?30, and Q/X<0.8.Type: GrantFiled: June 4, 2018Date of Patent: July 9, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hironori Takihara, Takahiro Sajima
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Patent number: 10343022Abstract: 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.Type: GrantFiled: October 10, 2017Date of Patent: July 9, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Hironori Takihara, Takahiro Sajima
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Patent number: 10335642Abstract: A golf ball (2) includes a core (4), an inner cover (6), a main cover (8), and an outer cover (10). X=Hc×Rc×0.05, S=Hs×Rc×0.05, M=Hm×Tm, I=Hi×Ti, O=Ho×To, and Q=(I+O)/2 that are calculated from a radius Rc of the core (4), a Shore C hardness Hc at a central point of the core (4), a Shore C hardness Hs at a surface of the core (4), a thickness Tm of the main cover (8), a Shore C hardness Hm of the main cover (8), a thickness Ti of the inner cover (6), a Shore C hardness Hi of the inner cover (6), a thickness To of the outer cover (10) and a Shore C hardness Ho of the outer cover (10), satisfy 15?M?S?100, 0.25<Q/M<0.5, ?10?I?O?30, and Q/X?0.8.Type: GrantFiled: June 4, 2018Date of Patent: July 2, 2019Assignee: SUMITOMO RUBBER INDUSTRIES, LTD.Inventors: Takahiro Sajima, Hironori Takihara