Patents by Inventor Takayuki Fukunaga

Takayuki Fukunaga 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: 11148476
    Abstract: A tire includes a pattern portion that is formed on a tire surface and in which ridges are arranged in a nest shape having a center point, the ridges including ridgelines CL having a curved portion in plan view, in which a height of each of the ridges is from 0.2 mm to 0.5 mm, and adjacent ridges are arranged at a constant pitch of from 0.15 mm to 0.35 mm.
    Type: Grant
    Filed: January 24, 2017
    Date of Patent: October 19, 2021
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Sotaro Iwabuchi, Takayuki Fukunaga
  • Publication number: 20210188018
    Abstract: Provided is a tire including: a decorative portion that is formed on an outer surface of the tire and that has a base surface; and a pattern region that is provided at the decorative portion and that formed with plural projections projecting at a height of from 0.1 mm to 1.0 mm from the base surface and formed at an interval of from more than 0.1 mm to 1.0 mm, in which the pattern region is provided with a gradual decrease region in which a height of the plural projections disposed adjacent to each other gradually decreases.
    Type: Application
    Filed: December 5, 2018
    Publication date: June 24, 2021
    Inventors: Sotaro IWABUCHI, Takayuki FUKUNAGA
  • Publication number: 20200369094
    Abstract: Provided is a tire including: a decorative portion that is formed on an outer surface of the tire and has a base surface; and a pattern region that is provided at the decorative portion and includes plural projections projecting from the base surface and formed at an interval of from more than 0.1 mm to 1.0 mm, the plural projections having a height of from 0.1 mm to 1.0 mm, in which at least in the pattern region, the plurality of projections is inclined in one direction with respect to a normal line perpendicular to the base surface.
    Type: Application
    Filed: December 5, 2018
    Publication date: November 26, 2020
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Sotaro IWABUCHI, Takayuki FUKUNAGA
  • Patent number: 10337082
    Abstract: Provided is a hearth roll for supporting and conveying a steel sheet in a continuous annealing furnace, wherein all of a shaft portion and a roil main body are made from one or more ceramic materials, preferably constituted with concentric ceramic layers of different ceramic materials centering on the rotation shaft of the roll. The hearth roll has not only an excellent pickup resistance but also a long roll life free from maintenance for long periods. Also provided is a continuous annealing facility using the hearth roll in at least one of a heating zone, a soaking zone and a cooling zone.
    Type: Grant
    Filed: September 29, 2015
    Date of Patent: July 2, 2019
    Assignee: JFE STEEL CORPORATION
    Inventor: Takayuki Fukunaga
  • Publication number: 20190118583
    Abstract: A pneumatic tire (10) according to the present invention includes blocks (100) arranged adjacent to each other in a tread surface view, each of the blocks (100) having a wheel tread contacted with a road surface. A circumferential edge (100f) of the block (100) is defined against an adjacent block (100B) adjacent to the block (100A) by a sipe (200). An inner side groove (400) is formed at an inner side in a tire radial direction of the sipe (200). At least a part of the inner side groove (400) is communicated with the sipe (200). The circumferential edge (100f) of the block (100A) is defined against the adjacent block (100B) by the inner side groove (400).
    Type: Application
    Filed: April 14, 2017
    Publication date: April 25, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Takamitsu NAKAMURA, Takayuki FUKUNAGA
  • Publication number: 20190023081
    Abstract: A tire includes a pattern portion that is formed on a tire surface and in which ridges are arranged in a nest shape having a center point, the ridges including ridgelines CL having a curved portion in plan view, in which a height of each of the ridges is from 0.2 mm to 0.5 mm, and adjacent ridges are arranged at a constant pitch of from 0.15 mm to 0.35 mm.
    Type: Application
    Filed: January 24, 2017
    Publication date: January 24, 2019
    Applicant: BRIDGESTONE CORPORATION
    Inventors: Sotaro IWABUCHI, Takayuki FUKUNAGA
  • Patent number: 10134514
    Abstract: In a method for producing a grain-oriented electrical steel sheet by hot rolling a raw steel material containing C: 0.002˜0.10 mass %, Si: 2.0˜8.0 mass % and Mn: 0.005˜1.0 mass % to obtain a hot rolled sheet, subjecting the hot rolled sheet to a hot band annealing as required and further to one cold rolling or two or more cold rollings including an intermediate annealing therebetween to obtain a cold rolled sheet having a final sheet thickness, subjecting the cold rolled sheet to a primary recrystallization annealing combined with decarburization annealing, applying an annealing separator to the steel sheet surface and then subjecting to a final annealing, when rapid heating is performed at a rate of not less than 50° C./s in a range of 100˜700° C. in the heating process of the primary recrystallization annealing, the steel sheet is subjected to a holding treatment at any temperature of 250˜600° C. for 0.
    Type: Grant
    Filed: February 24, 2014
    Date of Patent: November 20, 2018
    Assignee: JFE Steel Corporation
    Inventors: Masanori Uesaka, Takeshi Imamura, Ryuichi Suehiro, Takayuki Fukunaga, Toshito Takamiya
  • Patent number: 10072318
    Abstract: In a continuous annealing line for steel sheets comprising a heating zone, a soaking zone and a cooling zone, two or more induction heating devices are arranged in series in a front half part of the heating zone, and a heating stop region of 1˜30 m in length or a slow heating region having a heating rate of more than 0° C./s but not more than 10° C./s is provided in a temperature zone that the temperature of the steel sheet between two or more induction heating devices is 250° C. to 600° C. Even if the steel sheet is rapidly heated at a heating rate of not less than 50° C./s with such a rapid heating apparatus of the heating zone, the temperature distribution in the steel sheet is uniformized to realize the quality improvement of steel sheet shape or magnetic properties and so on.
    Type: Grant
    Filed: September 2, 2013
    Date of Patent: September 11, 2018
    Assignee: JFE STEEL CORPORATION
    Inventors: Takayuki Fukunaga, Isao Akagi
  • Publication number: 20170275731
    Abstract: Provided is a hearth roll for supporting and conveying a steel sheet in a continuous annealing furnace, wherein all of a shaft portion and a roil main body are made from one or more ceramic materials, preferably constituted with concentric ceramic layers of different ceramic materials centering on the rotation shaft of the roll. The hearth roll has not only an excellent pickup resistance but also a long roll life free from maintenance for long periods. Also provided is a continuous annealing facility using the hearth roll in at least one of a heating zone, a soaking zone and a cooling zone.
    Type: Application
    Filed: September 29, 2015
    Publication date: September 28, 2017
    Applicant: JFE STEEL CORPORATION
    Inventor: Takayuki FUKUNAGA
  • Publication number: 20160012949
    Abstract: In a method for producing a grain-oriented electrical steel sheet by hot rolling a raw steel material containing C: 0.002˜0.10 mass %, Si: 2.0˜8.0 mass % and Mn: 0.005˜1.0 mass % to obtain a hot rolled sheet, subjecting the hot rolled sheet to a hot band annealing as required and further to one cold rolling or two or more cold rollings including an intermediate annealing therebetween to obtain a cold rolled sheet having a final sheet thickness, subjecting the cold rolled sheet to a primary recrystallization annealing combined with decarburization annealing, applying an annealing separator to the steel sheet surface and then subjecting to a final annealing, when rapid heating is performed at a rate of not less than 50° C./s in a range of 100˜700° C. in the heating process of the primary recrystallization annealing, the steel sheet is subjected to a holding treatment at any temperature of 250˜600° C. for 0.
    Type: Application
    Filed: February 24, 2014
    Publication date: January 14, 2016
    Applicant: JFE STEEL CORPORATION
    Inventors: Masanori Uesaka, Takeshi Imamura, Ryuichi Suehiro, Takayuki Fukunaga, Toshito Takamiya
  • Publication number: 20150211089
    Abstract: In a continuous annealing line for steel sheets comprising a heating zone, a soaking zone and a cooling zone, two or more induction heating devices are arranged in series in a front half part of the heating zone, and a heating stop region of 1˜30 m in length or a slow heating region having a heating rate of more than 0° C./s but not more than 10° C./s is provided in a temperature zone that the temperature of the steel sheet between two or more induction heating devices is 250° C. to 600° C. Even if the steel sheet is rapidly heated at a heating rate of not less than 50° C./s with such a rapid heating apparatus of the heating zone, the temperature distribution in the steel sheet is uniformized to realize the quality improvement of steel sheet shape or magnetic properties and so on.
    Type: Application
    Filed: September 2, 2013
    Publication date: July 30, 2015
    Applicant: JFE Steel Corporation
    Inventors: Takayuki Fukunaga, Isao Akagi
  • Publication number: 20110048601
    Abstract: The present invention provides a pneumatic tire which can obtain a high wet drainage performance, roadholding ability, and wear-resistant property without sacrificing other capabilities A directional pattern is formed by a circumferential wide major groove, a first narrow circumferential minor groove, a second narrow circumferential minor groove, a first transverse groove, a second transverse groove, and a third transverse groove. The circumferential wide major groove is provided in a center region in a tire width direction of a tread. The first narrow circumferential minor groove is arranged on the outside in a tire axis direction of the circumferential wide major groove. The second narrow circumferential minor groove is arranged on the outside in the tire axis direction of the first narrow circumferential minor groove. The first transverse groove is extended from a tread end and coupled to the circumferential wide major groove.
    Type: Application
    Filed: November 8, 2010
    Publication date: March 3, 2011
    Applicant: BRIDGESTONE CORPORATION
    Inventor: Takayuki FUKUNAGA
  • Patent number: 7849895
    Abstract: The present invention provides a pneumatic tire which can obtain a high wet drainage performance, roadholding ability, and wear-resistant property without sacrificing other capabilities A directional pattern is formed by a circumferential wide major groove, a first narrow circumferential minor groove, a second narrow circumferential minor groove, a first transverse groove, a second transverse groove, and a third transverse groove. The circumferential wide major groove is provided in a center region in a tire width direction of a tread. The first narrow circumferential minor groove is arranged on the outside in a tire axis direction of the circumferential wide major groove. The second narrow circumferential minor groove is arranged on the outside in the tire axis direction of the first narrow circumferential minor groove. The first transverse groove is extended from a tread end and coupled to the circumferential wide major groove.
    Type: Grant
    Filed: May 27, 2005
    Date of Patent: December 14, 2010
    Assignee: Bridgestone Corporation
    Inventor: Takayuki Fukunaga
  • Publication number: 20100043935
    Abstract: In the present invention, a vehicle inner side bead filler sheet 32IN is provided at a tire side portion which is positioned on the vehicle inner side when the tire is mounted on a vehicle, a vehicle outer side bead filler sheet 32OUT is provided at a tire side portion which is positioned on the vehicle outer side when the tire is mounted on a vehicle, the height H1 of the vehicle inner side bead filler sheet is set larger than the height H2 of the vehicle outer side bead filler sheet. As a result, the rigidity of the tire side portion on the vehicle inner side can be set relatively higher than the rigidity of the tire side portion on the vehicle outer side.
    Type: Application
    Filed: March 12, 2008
    Publication date: February 25, 2010
    Inventors: Takayuki Fukunaga, Shu Nagai, Toshiharu Ito
  • Patent number: 7527082
    Abstract: A pneumatic tire which has improved drainage property on a wet road surface and improved uneven wear resistance and steering stability on a dry road surface while enhancing drainage property on a wet road surface. The tire has at least a pair of circumferential grooves 2 disposed at a tread portion 1. An inner land portion 3 and an outer land portion 4 are defined by outermost circumferential grooves 2a. A plurality of transverse grooves 5 are disposed on at least the outer land portion 4 and the outer land portion 4 is divided and formed into a large number of blocks by these transverse grooves 5. The width w1 of the groove bottom 6 of the outermost circumferential groove 2a is narrower than the opening width w2. The groove bottom extends with inclination with respect to the tire circumferential direction so that it substantially continues to the transverse groove between the adjacent transverse grooves. The groove bottom forms the zigzag shape as a whole.
    Type: Grant
    Filed: May 26, 2004
    Date of Patent: May 5, 2009
    Assignee: Bridgestone Corporation
    Inventor: Takayuki Fukunaga
  • Publication number: 20070215258
    Abstract: The present invention provides a pneumatic tire which can obtain a high wet drainage performance, roadholding ability, and wear-resistant property without sacrificing other capabilities A directional pattern is formed by a circumferential wide major groove 14, a first narrow circumferential minor groove 16, a second narrow circumferential minor groove 18, a first transverse groove 20, a second transverse groove 22, and a third transverse groove 24. The circumferential wide major groove 14 is provided in a center region in a tire width direction of a tread 12. The first narrow circumferential minor groove 16 is arranged on the outside in a tire axis direction of the circumferential wide major groove 14. The second narrow circumferential minor groove 18 is arranged on the outside in the tire axis direction of the first narrow circumferential minor groove 16. The first transverse groove 20 is extended from a tread end 12E and coupled to the circumferential wide major groove 14.
    Type: Application
    Filed: May 27, 2005
    Publication date: September 20, 2007
    Inventor: Takayuki Fukunaga
  • Patent number: D545757
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: July 3, 2007
    Assignee: Bridgestone Corporation
    Inventor: Takayuki Fukunaga
  • Patent number: D559170
    Type: Grant
    Filed: December 16, 2005
    Date of Patent: January 8, 2008
    Assignee: Bridgestone Corporation
    Inventor: Takayuki Fukunaga
  • Patent number: D713330
    Type: Grant
    Filed: August 23, 2012
    Date of Patent: September 16, 2014
    Assignee: Bridgestone Corporation
    Inventors: Tatsuya Tomida, Shungo Fujita, Jon Stuckey, Takayuki Fukunaga
  • Patent number: D785548
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: May 2, 2017
    Assignee: BRIDGESTONE CORPORATION
    Inventors: Takayuki Fukunaga, Akio Kusano