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).

  • Publication number: 20120277024
    Abstract: 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 includes 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 48. The respective deflections of the core and the ball under a specific load, and the relationship therebetween, are optimized. The volume ratio VR of dimples on the surface of the ball is optimized.
    Type: Application
    Filed: January 17, 2012
    Publication date: November 1, 2012
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Hiroshi HIGUCHI, Hisashi YAMAGISHI, Daisuke ARAI, Yuichiro OZAWA, Takashi OHIRA, Katsunori SATO
  • Publication number: 20120277021
    Abstract: A practice golf ball has a core made of a rubber composition which includes a base rubber, a co-crosslinking agent, a crosslinking initiator and a metal oxide, and has a cover which encases the core and is made of a resin material. The co-crosslinking agent is methacrylic acid. The resin material has a breaking strength of 20 to 80 MPa and an elongation of 150 to 600%. The ball is endowed with the properties required of practice balls intended for long-term use, including better durability to cracking and durability of appearance than ordinary game balls, and also better durability to ball surface loss than the one-piece golf balls which are commonly used as practice balls.
    Type: Application
    Filed: January 17, 2012
    Publication date: November 1, 2012
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Hiroshi HIGUCHI, Hisashi YAMAGISHI, Daisuke ARAI, Yuichiro OZAWA, Takashi OHIRA, Katsunori SATO
  • Patent number: 8182367
    Abstract: 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: Grant
    Filed: August 22, 2006
    Date of Patent: May 22, 2012
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Hiroyuki Nagasawa, Hiroshi Higuchi, Motoki Aoyagi, Daisuke Arai
  • Publication number: 20120108360
    Abstract: 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: Application
    Filed: January 6, 2012
    Publication date: May 3, 2012
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Junji UMEZAWA, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
  • Patent number: 8133136
    Abstract: 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 respective initial velocities (m/s) of the core, a sphere I composed of the core encased by the intermediate layer, and the golf ball satisfy formula A below, and the respective deflections (mm) of the core, the sphere I composed of the core encased by the intermediate layer, and the golf ball, when compressed under a final load of 130 kg from an initial load of 10 kgf, satisfy formula B below: (initial velocity of core?initial velocity of sphere I)2+(initial velocity of sphere I?initial velocity of golf ball)2<0.40; ??Formula A: 0.30<(deflection of core?deflection of sphere I)2+(deflection of sphere I?deflection of golf ball)2<0.70.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: March 13, 2012
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Junji Umezawa, Hiroshi Higuchi, Daisuke Arai, Hiroyuki Nagasawa
  • Publication number: 20120049187
    Abstract: Accompanying the miniaturization of a gate electrode of a trench gate power MOSFET, the curvature of the bottom part of the trench increases, and thereby, electric fields concentrate on the part and deterioration of a gate oxide film (insulating film) occurs. The deterioration of the gate insulating film is more likely to occur when the gate side bias is negative in the case of an N-channel type power MOSFET and when the gate side bias is positive in the case of a P-channel type power MOSFET. The present invention is a semiconductor device including an insulating gate power transistor etc. in a chip, wherein a gate protection element includes a bidirectional Zener diode and the bidirectional Zener diode has a plurality of P-type impurity regions (or a P-type impurity region) having different concentrations so that the withstand voltage with its gate side negatively biased and the withstand voltage with the gate side positively biased are different from each other.
    Type: Application
    Filed: August 27, 2011
    Publication date: March 1, 2012
    Inventors: Masamitsu HARUYAMA, Tatsuhiro Seki, Daisuke Arai
  • Patent number: 8123628
    Abstract: 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 thermoplastic resin, has a diameter of from 3 to 20 mm, 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. Such a golf ball is able to achieve an increased distance and has a good feel on impact.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: February 28, 2012
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Junji Umezawa, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
  • Patent number: 8103778
    Abstract: The present invention provides a network operations management method and apparatus which realizes efficient power-saving by enabling virtual servers to move between physical servers beyond network segments. A reallocation design unit 13 designs reallocation of virtual servers to physical servers so that necessary resource amounts are assigned to all virtual servers. When virtual servers VS need to move between physical servers PS beyond network segments NS for the designed reallocation, a grouping unit 14 changes a network segment NS to which physical servers PS are connected by changing the configuration of a router and switches. A reallocation unit 15 realizes efficient power-saving by reallocating the virtual servers to the physical servers based on the design made by the reallocation design unit 13.
    Type: Grant
    Filed: July 14, 2009
    Date of Patent: January 24, 2012
    Assignee: KDDI Corporation
    Inventors: Daisuke Arai, Kiyohito Yoshihara, Akira Idoue
  • Publication number: 20110281669
    Abstract: 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: Application
    Filed: July 27, 2011
    Publication date: November 17, 2011
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Hiroyuki NAGASAWA, Hiroshi HIGUCHI, Motoki AOYAGI, Daisuke ARAI
  • Publication number: 20110212266
    Abstract: The invention provides a method of manufacturing golf balls having a core and at 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: Application
    Filed: May 12, 2011
    Publication date: September 1, 2011
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: HIROYUKI NAGASAWA, HIROSHI HIGUCHI, MOTOKI AOYAGI, DAISUKE ARAI
  • Publication number: 20110204413
    Abstract: 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: Application
    Filed: February 25, 2010
    Publication date: August 25, 2011
    Inventors: Daisuke Arai, Yoshito Nakazawa, Norio Hosoya
  • Publication number: 20110172028
    Abstract: 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 thermoplastic resin, has a diameter of from 21 to 38 mm, 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 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. Such a golf ball is able to achieve an increased distance.
    Type: Application
    Filed: March 23, 2011
    Publication date: July 14, 2011
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Junji UMEZAWA, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
  • Publication number: 20110172031
    Abstract: The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of two or more layers, which solid core has an inner core layer and an outer core layer, and cover has an inner cover layer and an outer cover layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 21 to 38 mm, 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 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: Application
    Filed: March 23, 2011
    Publication date: July 14, 2011
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Junji UMEZAWA, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
  • Publication number: 20110172029
    Abstract: The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of two or more layers, which solid core has an inner core layer and an outer core layer, and cover has an inner cover layer and an outer cover layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 21 to 38 mm, 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 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: Application
    Filed: March 23, 2011
    Publication date: July 14, 2011
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Junji UMEZAWA, Kae Ilzuka, Daisuke Arai, Hiroshi Higuchi
  • Publication number: 20110172032
    Abstract: The invention provides a multi-piece solid golf ball composed of a solid core encased by a cover of two or more layers, which solid core has an inner core layer and an outer core layer, and cover has an inner cover layer and an outer cover layer. The inner core layer is formed primarily of a thermoplastic resin, has a diameter of from 21 to 38 mm, 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 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: Application
    Filed: March 23, 2011
    Publication date: July 14, 2011
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Junji UMEZAWA, Kae IIZUKA, Daisuke ARAI, Hiroshi HIGUCHI
  • Publication number: 20110172030
    Abstract: 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 thermoplastic resin, has a diameter of from 21 to 38 mm, 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 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. Such a golf ball is able to achieve an increased distance.
    Type: Application
    Filed: March 23, 2011
    Publication date: July 14, 2011
    Applicant: BRIDGESTONE SPORTS CO., LTD.
    Inventors: Junji UMEZAWA, Kae IIZUKA, Daisuke ARAI, Hiroshi HIGUCHI
  • Patent number: 7964132
    Abstract: The invention provides a method of manufacturing golf balls having a core and at 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 golf balls thus obtained have a high rebound and excellent scuff resistance.
    Type: Grant
    Filed: August 22, 2006
    Date of Patent: June 21, 2011
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Hiroyuki Nagasawa, Hiroshi Higuchi, Motoki Aoyagi, Daisuke Arai
  • Patent number: 7938744
    Abstract: 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 thermoplastic resin, has a diameter of from 21 to 38 mm, 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 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. Such a golf ball is able to achieve an increased distance.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: May 10, 2011
    Assignee: Bridgestone Sports Co., Ltd.
    Inventors: Junji Umezawa, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
  • Publication number: 20110045923
    Abstract: 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: Application
    Filed: November 3, 2010
    Publication date: February 24, 2011
    Applicant: BRIDGESTONE SPORTS CO., LTD
    Inventors: Junji UMEZAWA, Kae Iizuka, Daisuke Arai, Hiroshi Higuchi
  • Patent number: 7870237
    Abstract: The present invention provides a network configuration restoration method and system which can perform restoration by copying past configuration files in a short time. An updating judging unit 304 judges updating of each network device by comparing an acquired configuration file and a registered configuration file linked to a first identifier representing a copy timing. A new save unit 312 acquires an updated configuration file from a network device, and links the updated configuration file to a first identifier and a second identifier which sets the current timing as a new save timing and saves it in a configuration file database 301. A save unit 311 copies a registered configuration file of a network device whose configuration file has not been updated and links it to a first identifier representing the copy timing and a second identifier linked to this configuration file and saves it.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: January 11, 2011
    Assignee: KDDI Corporation
    Inventors: Daisuke Arai, Kiyohito Yoshihara, Akira Idoue, Hiroki Horiuchi