Patents by Inventor Daisuke Arai
Daisuke Arai 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: 8814726Abstract: A multi-piece solid golf ball composed of a solid core having an inner core layer and an outer core layer encased by a cover including at least an inner cover layer and an outer cover layer. The inner core layer has a JIS-C cross-sectional hardness of from 60 to 83 at any single point on a cross-section, and has a cross-sectional hardness difference between any two points on the cross-section of within ±5. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer. And, the difference in Shore D hardness between the inner cover layer and the outer cover layer is within ±5.Type: GrantFiled: March 23, 2011Date of Patent: August 26, 2014Assignee: Bridgestone Sports Co., Ltd.Inventors: Junji Umezawa, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
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Publication number: 20140235020Abstract: Techniques capable of improving the yield of IGBTs capable of reducing steady loss, turn-off time, and turn-off loss are provided. Upon formation of openings in an interlayer insulting film formed on a main surface of a substrate, etching of a laminated insulating film of a PSG film and an SOG film and a silicon oxide film is once stopped at a silicon nitride film. Then, the silicon nitride film and the silicon oxide film are sequentially etched to form the openings. As a result, the openings are prevented from penetrating through an n-type source layer and a p+-type emitter layer having a thickness of 20 to 100 nm and reaching the substrate.Type: ApplicationFiled: April 25, 2014Publication date: August 21, 2014Applicant: RENESAS ELECTRONICS CORPORATIONInventors: Daisuke ARAI, Yoshito NAKAZAWA, Ikuo HARA, Tsuyoshi KACHI, Yoshinori HOSHINO, Tsuyoshi TABATA
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Patent number: 8808110Abstract: A multi-piece solid golf ball composed of a solid core having an inner core layer and an outer core layer encased by a cover of one or more layer. The inner core layer has a JIS-C cross-sectional hardness of from 60 to 83 at any single point on a cross-section obtained by cutting the inner core layer in half, and has a cross-sectional hardness difference between any two points on the cross-section of within ±5. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer.Type: GrantFiled: March 23, 2011Date of Patent: August 19, 2014Assignee: Bridgestone Sports Co., Ltd.Inventors: Junji Umezawa, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
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Patent number: 8808111Abstract: A multi-piece solid golf ball composed of a solid core having an inner core layer and an outer core layer encased by a cover of one or more layer. The inner core layer has a JIS-C cross-sectional hardness of from 60 to 83 at any single point on a cross-section, and has a cross-sectional hardness difference between any two points on the cross-section of within ±5. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer.Type: GrantFiled: March 23, 2011Date of Patent: August 19, 2014Assignee: Bridgestone Sports Co., Ltd.Inventors: Junji Umezawa, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
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Patent number: 8741699Abstract: Techniques capable of improving the yield of IGBTs capable of reducing steady loss, turn-off time, and turn-off loss are provided. Upon formation of openings in an interlayer insulting film formed on a main surface of a substrate, etching of a laminated insulating film of a PSG film and an SOG film and a silicon oxide film is once stopped at a silicon nitride film. Then, the silicon nitride film and the silicon oxide film are sequentially etched to form the openings. As a result, the openings are prevented from penetrating through an n-type source layer and a p+-type emitter layer having a thickness of 20 to 100 nm and reaching the substrate.Type: GrantFiled: May 24, 2012Date of Patent: June 3, 2014Assignee: Renesas Electronics CorporationInventors: Daisuke Arai, Yoshito Nakazawa, Ikuo Hara, Tsuyoshi Kachi, Yoshinori Hoshino, Tsuyoshi Tabata
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Publication number: 20140073461Abstract: The invention provides a golf ball endowed with an improved distance and durability. The ball has a core and a cover, the core being formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator, a metal oxide and an organosulfur compound. The co-crosslinking agent is methacrylic acid, the metal oxide is zinc oxide, and the rubber composition contains the crosslinking initiator in an amount of from 1.2 to 5 parts by weight per 100 parts by weight of the base rubber. The finished ball has an initial velocity of at least 74.3 m/s.Type: ApplicationFiled: September 7, 2012Publication date: March 13, 2014Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Yuichiro OZAWA, Daisuke ARAI, Hiroshi HIGUCHI, Takashi OHIRA, Katsunori SATO
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Publication number: 20140073460Abstract: The invention provides a golf ball endowed with an improved distance and durability. The ball has a core and a cover, the core being formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The base rubber is a mixture of (A) polybutadiene with (B) styrene-butadiene rubber and/or isoprene rubber, the co-crosslinking agent is methacrylic acid, and the metal oxide is zinc oxide. The rubber composition contains the crosslinking initiator in an amount of from 1.2 to 5 parts by weight per 100 parts by weight of the base rubber.Type: ApplicationFiled: September 7, 2012Publication date: March 13, 2014Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Yuichiro OZAWA, Daisuke ARAI, Hiroshi HIGUCHI, Takashi OHIRA, Katsunori SATO
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Publication number: 20140073455Abstract: The invention provides a golf ball endowed with an improved distance and durability. The ball has a core and a cover, the core being formed of a rubber composition containing a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The co-crosslinking agent is methacrylic acid. The core has a hardness profile in which, letting (A) be the JIS-C hardness at the core surface, (B) be the JIS-C hardness at a position 2 mm in from the surface toward the center of the core, (C) be the JIS-C hardness at a position 5 mm in from the surface toward the center of the core, (D) be the JIS-C hardness at a position 10 mm in from the surface toward the center of the core, (E) be the JIS-C hardness at a position 15 mm in from the surface toward the center of the core, and (F) be the JIS-C hardness at the center of the core, (A) to (F) have specific hardnesses.Type: ApplicationFiled: September 7, 2012Publication date: March 13, 2014Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Yuichiro OZAWA, Daisuke ARAI, Hiroshi HIGUCHI, Takashi OHIRA, Katsunori SATO
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Publication number: 20130330587Abstract: In a vehicle battery unit, since a second support plate (30B) and a second end plate (29B) of a second battery module (22B) having a plurality of battery cells (21) stacked are placed on top of a first support plate (30A) and a first end plate (29A) of a first battery module (22A) having a plurality of the battery cells (21), it is possible to prevent the weight of the second battery module (22B) from being imposed on the battery cells (21) of the first battery module (22A). Moreover, since it is not necessary to provide on the exterior of the first battery module (22A) a member for supporting the weight of the second battery module (22B), it is possible to reduce the dimensions of the first battery module (22A).Type: ApplicationFiled: October 13, 2011Publication date: December 12, 2013Applicant: HONDA MOTOR CO., LTDInventors: Koichi Takahashi, Eiji Koike, Daisuke Arai, Takurou Kamada, Kentaro Shibuya, Harumi Takedomi
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Patent number: 8585515Abstract: The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of one or more layer, which solid core has an inner core layer and an outer core layer. The inner core layer is formed primarily of a specific, highly neutralized, ionomeric resin composition, has a diameter of from 10 to 38 mm, and has a cross-sectional hardness difference of within ±5 between any two points on a cross-section formed by cutting the inner core layer in half. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 30 to 42 mm. The sum of the hardnesses at the center of the inner core layer and at the surface of the outer core layer is set to a value in a range of from 130 to 170. Such a golf ball is able to achieve an increased distance.Type: GrantFiled: November 3, 2010Date of Patent: November 19, 2013Assignee: Bridgestone Sports Co., Ltd.Inventors: Junji Umezawa, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
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Patent number: 8587087Abstract: In order to improve characteristics of an IGBT, particularly, to reduce steady loss, turn-off time and turn-off loss, a thickness of a surface semiconductor layer is set to about 20 nm to 100 nm in an IGBT including: a base layer; a buried insulating film provided with an opening part; the surface semiconductor layer connected to the base layer below the opening part; a p type channel forming layer formed in the surface semiconductor layer; an n+ type source layer; a p+ type emitter layer; a gate electrode formed over the surface semiconductor layer via a gate insulating film; an n+ type buffer layer; and a p type collector layer.Type: GrantFiled: February 25, 2010Date of Patent: November 19, 2013Assignee: Renesas Electronics CorporationInventors: Daisuke Arai, Yoshito Nakazawa, Norio Hosoya
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Patent number: 8545346Abstract: The invention provides a multi-piece solid golf ball composed of a solid core, a cover, at least one intermediate layer interposed therebetween, and a plurality of dimples on a surface of the ball. The diameter of the solid core, the deflection of the core when compressed under a final load of 130 kgf from an initial load of 10 kgf, the hardness at the center of the core, the hardness in a region 5 mm to a region 10 mm from the center of the core, the hardness in a region 15 mm from the center of the core, and the surface hardness are set within specific ranges. The intermediate layer is composed primarily of a material obtained by mixing under applied heat a specific resin composition.Type: GrantFiled: February 18, 2010Date of Patent: October 1, 2013Assignee: Bridgestone Sports Co., Ltd.Inventors: Hiroshi Higuchi, Hiroyuki Nagasawa, Junji Umezawa, Daisuke Arai
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Patent number: 8512165Abstract: A multi-piece solid golf ball is composed of a solid core encased by a cover of one or more layer, which solid core has an inner core layer and an outer core layer. The inner core layer is formed primarily of a thermoplastic resin, and has a cross-sectional hardness difference of within ±5 between any two points on a cross-section obtained by cutting the inner core layer in half. The outer core layer is formed of a rubber composition made primarily of polybutadiene rubber. The solid core has a diameter of from 35 to 42 mm. The ball has specific relationships between the hardness of the inner core layer 1 mm inside a boundary between the inner core layer and the outer core layer, the hardness of the outer core layer 1 mm outside the boundary, and the surface hardness of the outer core layer.Type: GrantFiled: January 6, 2012Date of Patent: August 20, 2013Assignee: Bridgestone Sports Co., Ltd.Inventors: Junji Umezawa, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
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Patent number: 8486322Abstract: The invention provides a method of manufacturing golf balls having a core and least one cover layer which involves injecting a molten cover resin material around a core so as to form a cover layer. The cover resin material is a single resin composition made up of (A) a thermoplastic polyurethane, (B) a polyisocyanate compound and (C) a thermoplastic elastomer other than the thermoplastic polyurethane in a weight ratio (A):(B):(C)=100: {2-50}: {0-50}, and is injected with from 10 to 99% of the total number of isocyanate groups in component B remaining in an unreacted state within the cover resin material. The method of the invention provides a high manufacturability and a good amenability to mass production, and the manufactured gold balls thus obtained have a high rebound and excellent scuff resistance.Type: GrantFiled: May 12, 2011Date of Patent: July 16, 2013Assignee: Bridgestone Sports Co., Ltd.Inventors: Hiroyuki Nagasawa, Hiroshi Higuchi, Motoki Aoyagi, Daisuke Arai
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Patent number: 8367781Abstract: The invention provides a golf ball having a core and one or more cover layer encasing the core, wherein at least one cover layer is formed by injection-molding a single resin composition of primarily (A) a thermoplastic polyurethane and (B) a polyisocyanate compound, and at least some polyisocyanate compound in which all the isocyanate groups on the molecule remain in an unreacted state is present in the resin composition. The golf ball has a high rebound, an excellent spin performance and an excellent scuff resistance, and the cover layer-forming resin composition has excellent flow properties and an excellent cover layer manufacturability.Type: GrantFiled: July 27, 2011Date of Patent: February 5, 2013Assignee: Bridgestone Sports Co., Ltd.Inventors: Hiroyuki Nagasawa, Hiroshi Higuchi, Motoki Aoyagi, Daisuke Arai
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Publication number: 20120299056Abstract: Techniques capable of improving the yield of IGBTs capable of reducing steady loss, turn-off time, and turn-off loss are provided. Upon formation of openings in an interlayer insulting film formed on a main surface of a substrate, etching of a laminated insulating film of a PSG film and an SOG film and a silicon oxide film is once stopped at a silicon nitride film. Then, the silicon nitride film and the silicon oxide film are sequentially etched to form the openings. As a result, the openings are prevented from penetrating through an n-type source layer and a p+-type emitter layer having a thickness of 20 to 100 nm and reaching the substrate.Type: ApplicationFiled: May 24, 2012Publication date: November 29, 2012Inventors: Daisuke ARAI, Yoshito NAKAZAWA, Ikuo HARA, Tsuyoshi KACHI, Yoshinori HOSHINO, Tsuyoshi TABATA
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Publication number: 20120277025Abstract: A practice golf ball with a core and a cover has, upon initial measurement, a deflection BH1 (mm) when compressed under a final load of 1,275 N from an initial load of 98 N and an initial velocity BV1 (m/s), and also has, when measured again after being left to stand for 350 days following initial measurement, a deflection BH2 (mm) when compressed under a final load of 1,275 N from an initial load of 98 N and an initial velocity BV2 (m/s), such that the difference BH2?BH1 is not more than 0.2 mm and the difference BV2?BV1 is not more than 0.3 m/s. The ball has excellent durability to cracking and durability of appearance, and also maintains a stable feel and flight performance over a long period of time.Type: ApplicationFiled: January 17, 2012Publication date: November 1, 2012Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hiroshi HIGUCHI, Hisashi YAMAGISHI, Daisuke ARAI, Yuichiro OZAWA, Katsunori SATO, Takashi OHIRA
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Publication number: 20120277020Abstract: A practice golf ball has a core and a cover. The core is made of a rubber composition which includes a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide. The base rubber is a mixture of polybutadiene with styrene-butadiene rubber and/or isoprene rubber, and the co-crosslinking agent is methacrylic acid. The core has a specific deflection under a specific load, and the ball has a specific initial velocity. The dimples on the surface of the ball have a volume ratio VR of from 0.95 to 1.7.Type: ApplicationFiled: January 17, 2012Publication date: November 1, 2012Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hiroshi HIGUCHI, Hisashi YAMAGISHI, Daisuke ARAI, Yuichiro OZAWA, Takashi OHIRA, Katsunori SATO
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Publication number: 20120277023Abstract: In a practice golf ball having a core and a cover encasing the core, the cover has a material hardness, expressed as the Shore D hardness, of from 30 to 57. The core has an initial velocity CV (m/s) and the ball has an initial velocity BV1 (m/s) such that the value CV?BV1 satisfies the condition (CV?BV1)=0.7×(cover thickness)?b, where 0.1?b?1.0. The ball has a soft feel on impact like that of a one-piece golf ball and thus is able to reduce strain on the player's body, in addition to which it has much better durability to cracking than commonly used game balls, good retention of appearance even with long-term use, and a distance that is controlled so as to be appropriate for a driving range.Type: ApplicationFiled: January 17, 2012Publication date: November 1, 2012Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hiroshi HIGUCHI, Hisashi YAMAGISHI, Daisuke ARAI, Yuichiro OZAWA, Katsunori SATO, Takashi OHIRA
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Publication number: 20120277022Abstract: A practice golf ball has a core and a cover. The core is made of a rubber composition which includes a base rubber, a co-crosslinking agent which is methacrylic acid, a crosslinking initiator and a metal oxide. The respective ingredients in the rubber composition are formulated in specific amounts, and the core has an optimized hardness profile. The cover is made of a resin component which is composed primarily of polyurethane. The cover has a thickness of 0.3 mm to 1.9 mm, and a material hardness, expressed as the Shore D hardness, of 30 to 57. The respective deflections of the core and the ball under a specific load, and the relationship therebetween, are optimized.Type: ApplicationFiled: January 17, 2012Publication date: November 1, 2012Applicant: BRIDGESTONE SPORTS CO., LTD.Inventors: Hiroshi HIGUCHI, Hisashi YAMAGISHI, Daisuke ARAI, Yuichiro OZAWA, Takashi OHIRA, Katsunori SATO