Patents by Inventor Kosuke TACHIBANA
Kosuke TACHIBANA 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).
-
Patent number: 9968828Abstract: An object of the present invention is to provide a golf ball having a high performance as well as the visibility and the fashionable appearance. The present invention provides a colored golf ball having a color other than white and comprising: a core having a center and at least one intermediate layer disposed around the center, and a cover disposed around the core, wherein the cover and at least one of the intermediate layer preferably contain a fluorescent dye and/or a fluorescent pigment.Type: GrantFiled: November 30, 2012Date of Patent: May 15, 2018Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kosuke Tachibana, Keiji Ohama
-
Patent number: 9962578Abstract: An object of the present invention is to provide a golf ball having a high performance as well as the visibility and the fashionable appearance. The present invention provides a colored golf ball having a color other than white and comprising: a core having a center and at least one intermediate layer disposed around the center, and a cover disposed around the core, wherein the cover and at least one of the intermediate layer preferably contain a fluorescent dye and/or a fluorescent pigment.Type: GrantFiled: March 10, 2010Date of Patent: May 8, 2018Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kosuke Tachibana, Keiji Ohama
-
Patent number: 9956456Abstract: Provided is 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) is 0 or more in Shore C hardness, a surface hardness (HX+Y) of the spherical core is more than 70 in Shore C hardness, an angle ? of a hardness gradient of the inner layer is 0° or more, a difference (???) between the angle ? and an angle ? of a hardness gradient of the outer layer is 0° or more, the intermediate layer has a material hardness (Hm) ranging from 65 to 80 in Shore D hardness, and the intermediate layer has a highest hardness among the constituent members of the golf ball.Type: GrantFiled: April 26, 2016Date of Patent: May 1, 2018Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kazuya Kamino, Kosuke Tachibana
-
Patent number: 9914021Abstract: An object of the present invention is to provide a golf ball traveling a great distance on driver shots.Type: GrantFiled: April 19, 2016Date of Patent: March 13, 2018Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kohei Mimura, Takahiro Sajima, Kosuke Tachibana
-
Publication number: 20180036602Abstract: A golf ball 2 includes a core 4, a mid layer 6, a reinforcing layer 8, and a cover 10. When distances (%) from the central point of the core 4 to nine points and JIS-C hardnesses at the nine points, which are obtained by dividing a region from the central point of the core 4 to the surface of the core 4 at intervals of 12.5% of the radius of the core 4, are plotted in a graph, R2 of a linear approximation curve obtained by a least-square method is equal to or greater than 0.95. The difference (H(100)-H(0)) between a JIS-C hardness H(100) at the surface of the core 4 and a JIS-C hardness H(0) at the central point of the core 4 is equal to or greater than 15.Type: ApplicationFiled: October 6, 2017Publication date: February 8, 2018Applicant: DUNLOP SPORTS CO. LTD.Inventors: Yoshiko TAKUBO, Kazuhiko ISOGAWA, Kosuke TACHIBANA
-
Patent number: 9861861Abstract: 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 (Tcmax?Tcmin)?0.15 mm 0.15?(Tp/Tcmin)?0.Type: GrantFiled: June 26, 2015Date of Patent: January 9, 2018Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kazuya Kamino, Kosuke Tachibana, Takahiro Sajima
-
Patent number: 9849345Abstract: Provided is a golf ball is excellent in flight distance performance, approach performance, and feel at impact. A ball 2 includes a core 4, a mid layer 6, and a cover 8. The core 4 includes an inner core 10 and an outer core 12. The cover 8 includes an inner layer cover 10 and an outer layer cover 12. An inner core volume Vc, a mid layer volume Vm, a mid layer hardness Hm, an inner layer cover volume Vinc, an inner layer cover hardness Hinc, an outer layer cover volume Vouc, an outer layer cover hardness Houc, and a ball volume V meet the following relational expressions (a) to (g): (a) Vc/V<0.07, (b) Hm>Hinc>Houc, (c) Hm?Houc>25, (d) Vm>Vinc>Vouc, (e) (Vm+Vinc+Vouc)/V<0.30, (f) Vm/Vouc>1.50, and (g) (Vm*Hm)/(Vouc*Houc)>3.0.Type: GrantFiled: December 10, 2014Date of Patent: December 26, 2017Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kazuhiko Isogawa, Kosuke Tachibana
-
Patent number: 9849343Abstract: 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, 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 70 in Shore C hardness, an angle ? of a hardness gradient of the inner layer is 0° or more, a difference (???) between the angle ? and an angle ? of a hardness gradient of the outer layer is 0° or more, and the intermediate layer has a highest hardness among the constituent members of the golf ball.Type: GrantFiled: April 14, 2016Date of Patent: December 26, 2017Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kosuke Tachibana, Kazuya Kamino
-
Publication number: 20170304684Abstract: A golf ball 2 includes a spherical core 4, an inner mid layer 6, an outer mid layer 8, a reinforcing layer 10, and a cover 12. When distances (%) from a central point of the core 4 to nine points and JIS-C hardnesses at the nine points, which nine points are obtained by dividing a region from the central point of the core 4 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 equal to or greater than 0.95. Hm1 is greater than Hm2. Hc is less than Hm1. T2 is equal to or greater than 0.5 mm but equal to or less than 1.6 mm.Type: ApplicationFiled: July 13, 2017Publication date: October 26, 2017Applicant: DUNLOP SPORTS CO. LTD.Inventors: Kazuhiko ISOGAWA, Kosuke TACHIBANA
-
Patent number: 9789369Abstract: An object of the present invention is to provide a golf ball traveling a great distance on driver shots and on iron shots.Type: GrantFiled: April 26, 2016Date of Patent: October 17, 2017Assignee: DUNLOP SPORTS CO. LTD.Inventors: Hironori Takihara, Kosuke Tachibana, Takahiro Sajima, Kohei Mimura
-
Patent number: 9782635Abstract: A golf ball includes a core, a mid layer, and a cover. The core includes an inner core, a mid core, and an outer core. The mid layer includes an inner mid layer and an outer mid layer. A hardness H(C) is equal to or greater than a hardness H(B). A hardness H(E) is equal to or greater than a hardness H(D). An angle ? is calculated by (Formula 1). An angle ? is calculated by (Formula 2). The angle ? is 0° or greater. A difference (???) is 0° or greater. A hardness Hm2 of the outer mid layer is greater than a hardness Hm1 of the inner mid layer.Type: GrantFiled: December 22, 2014Date of Patent: October 10, 2017Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kosuke Tachibana, Kazuhiko Isogawa
-
Patent number: 9731167Abstract: An object of the present invention is to provide a golf ball striking a good balance between flight distance on driver shots and spin rate on approach shots, and excellent in stain resistance and shot feeling. The present invention provides a golf ball comprising a paint film, wherein a base resin of the paint film contains a polyurethane obtained by a reaction between a polyisocyanate composition and a polyol composition containing a urethane polyol having a polyether diol with a number average molecular weight in a range from 800 to 3,000 as a constituent component, and the following requirements are satisfied: Mp?200×X?75 Mp?100 Minm?Moum>40 Moum?Mc<5 Tinm?Toum>Tc>Tp (Tinm×Minm)/(Toum×Moum)>2.0 (Toum×Moum)/(Tc×Mc)<3.0 (Tc×Mc)/(Tp×Mp)>10.Type: GrantFiled: December 28, 2015Date of Patent: August 15, 2017Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kosuke Tachibana, Kazuhiko Isogawa, Toshiyuki Tarao
-
Publication number: 20170182371Abstract: A golf ball 2 includes an inner core 4, an outer core 6, a mid layer 8, a cover 10, and dimples 12. A diameter D1, a volume V1, a hardness H1o at a central point, a boundary inside hardness H1in, and a hardness difference De1 of the inner core 4; a volume V2 (mm3) and a hardness difference De2 of the outer core 6; a thickness Tm and a hardness Hm of the mid layer 8; and a thickness Tc and a hardness Hc of the cover 10 meet the following mathematical formulas. 1.0<V2/V1<7.0 De2?De1<0 600<(H1o*H1in)*(D1/2)/2<1000 620<Tc*Hc*Hm/Tm<900 The dimples 12 include a plurality of small dimples each having an area of less than 8.0 mm2.Type: ApplicationFiled: November 28, 2016Publication date: June 29, 2017Applicant: DUNLOP SPORTS CO. LTD.Inventors: Kohei MIMURA, Kazuya KAMINO, Kosuke TACHIBANA
-
Publication number: 20170173402Abstract: A golf ball 2 includes an inner core 4, an outer core 6, a mid layer 8, a cover 10, and dimples 12. A diameter D1, a volume V1, a hardness H1o at a central point, a boundary inside hardness H1in, and a hardness difference De1 of the inner core 4; a volume V2 (mm3) and a hardness difference De2 of the outer core 6; a thickness Tm and a hardness Hm of the mid layer 8; and a thickness Tc and a hardness Hc of the cover 10 meet the following mathematical formulas. 1.0<V2/V1<7.0 De2?De1<0 600<(H1o*H1in)*(D1/2)/2<1000 620<Tc*Hc*Hm/Tm<900 A dimple pattern of each hemisphere of the golf ball 2 includes three units rotationally symmetrical to each other.Type: ApplicationFiled: December 20, 2016Publication date: June 22, 2017Applicant: DUNLOP SPORTS CO. LTD.Inventors: Takahiro SAJIMA, Kohei MIMURA, Kosuke TACHIBANA, Kazuya KAMINO
-
Publication number: 20170173398Abstract: An object of the present invention is to provide a golf ball travelling a great flight distance on driver shots, exhibiting an excellent spin performance on approach shots under a dry condition and a wet condition, and showing an excellent shot feeling and durability. The present invention provides a golf ball comprising a golf ball body having a spherical core, an intermediate layer and a cover, and a paint film composed of two or more layers, wherein a 10% elastic modulus difference (Min?Mout) between an innermost layer and an outermost layer of the paint film is 25 kgf/cm2 or more.Type: ApplicationFiled: December 16, 2016Publication date: June 22, 2017Applicant: Dunlop Sports Co. Ltd.Inventors: Kosuke TACHIBANA, Kazuya KAMINO, Toshiyuki TARAO, Hidetaka INOUE
-
Publication number: 20170173401Abstract: A golf ball 2 includes an inner core 4, an outer core 6, a mid layer 8, and a cover 10. A diameter D1, a volume V1, a hardness H1o at a central point, and a boundary inside hardness H1in of the inner core 4; a volume V2, a boundary outside hardness H2out, and a surface hardness H2s of the outer core 6; a thickness Tm and a hardness Hm of the mid layer 8; and a thickness Tc and a hardness Hc of the cover 10 meet the following mathematical formulas (1) to (4): 1.0<V2/V1<7.0 (1); ?2<H2s?H2out<2 (2); 600<(H1o+H1in)*(D1/2)/2<1000 (3); 620<Tc*Hc*Hm/Tm<900 (4). The cover 10 includes a polyrotaxane.Type: ApplicationFiled: November 4, 2016Publication date: June 22, 2017Applicant: DUNLOP SPORTS CO. LTD.Inventors: Kazuya KAMINO, Kosuke TACHIBANA, Toshiyuki TARAO, Mami TANAKA
-
Patent number: 9682284Abstract: A golf ball 2 includes a core 4, a first mid layer 10, a second mid layer 12, a third mid layer 14, and a cover 8. A volume Vinm and a Shore D hardness Hinm of the first mid layer, a volume Vm and a Shore D hardness Hm of the second mid layer, a volume Voum and a Shore D hardness Houm of the third mid layer, a volume Vc and a Shore D hardness Hc of the cover, and a volume V of an entirety of the ball meet: (a) Hinm<Hm>Houm>Hc, (b) Vinm<Vm>Voum>Vc, (c) Hm?Hc>25, (d) (Vinm+Vm+Voum+Vc)/V<0.40, (e) Vm/Vc>1.50, and (f) (Vm*Hm)/(Vc*Hc)>3.0.Type: GrantFiled: December 22, 2014Date of Patent: June 20, 2017Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kazuhiko Isogawa, Kosuke Tachibana
-
Publication number: 20170165528Abstract: A golf ball 2 includes a core 4, a mid layer 6, and a cover 8. A difference DH in hardness between a surface and a central point of the core 4; a thickness Tm (mm), a hardness Hm, and a volume Vm (mm3) of the mid layer 6; and a thickness Tc (mm), a hardness Hc, and a virtual volume Vc (mm3) of the cover 8 meet the following mathematical formulas. (DH*Hm)/(Hc*Tc)>63 3.0<((Vm*Hm)/(Vc*Hc))<7.5 A dimple pattern of each hemisphere of the golf ball 2 includes three units that are rotationally symmetrical to each other. A dimple pattern of each unit includes two small units that are mirror-symmetrical to each other.Type: ApplicationFiled: November 16, 2016Publication date: June 15, 2017Applicant: DUNLOP SPORTS CO. LTD.Inventors: Hironori TAKIHARA, Kohei MIMURA, Kosuke TACHIBANA, Kazuya KAMINO
-
Publication number: 20170165530Abstract: A golf ball 2 includes a core 4, a mid layer 6, and a cover 8. A difference DH in hardness between a surface and a central point of the core 4, a thickness Tm and a hardness Hm of the mid layer 6, a thickness Tc and a hardness Hc of the cover 8, and an amount of compressive deformation Sb of the golf ball 2 meet the following mathematical formulas (DH*Hm)/(Hc*Tc)>80 and ((Sb*Tc)/(Hc*Hm*Tm))*1000>0.75. A hardness Hc of the cover 8 is equal to or less than 40. A material of the cover 8 is a resin composition. The resin composition includes a polyurethane (A) and a polyrotaxane (B).Type: ApplicationFiled: November 9, 2016Publication date: June 15, 2017Applicant: DUNLOP SPORTS CO. LTD.Inventors: Kosuke TACHIBANA, Kazuya KAMINO, Toshiyuki TARAO, Mami TANAKA
-
Patent number: 9669266Abstract: A golf ball includes a spherical core and a cover. The core includes an inner core, a mid core, and an outer core. A hardness H(C) is equal to or greater than a hardness H(B). A hardness H(E) is equal to or greater than a hardness H(D). An angle ? is calculated by (Formula 1) from a thickness Y (mm) of the mid core, the hardness H(C), and the hardness H(D). An angle ? is calculated by (Formula 2) from a thickness Z (mm) of the outer core, the hardness H(E), and the hardness H(F). Each of the angle ? and a difference (???) between the angles ? and ? is equal to or greater than 0°. The golf ball has excellent flight performance upon a shot with a driver.Type: GrantFiled: October 28, 2014Date of Patent: June 6, 2017Assignee: DUNLOP SPORTS CO. LTD.Inventors: Kosuke Tachibana, Kazuhiko Isogawa