Patents by Inventor Hiroshi Okikawa

Hiroshi Okikawa 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: 10497489
    Abstract: A cable includes a conductor, an insulation coating layer on the conductor, and an outer coating layer on the insulation coating layer. The insulation coating layer is made of a composition containing 100 parts by mass of a base polymer (A) and 100 to 250 parts by mass of a non-halogen flame retardant. The polymer (A) contains 70% to 99% by mass of an ethylene-vinyl acetate copolymer (a1) containing an ethylene-vinyl acetate copolymer having a melting point of 70° C. or higher, and 1% to 30% by mass of an acid-modified polyolefin resin (a2) having a glass transition point of ?55° C. or lower. The polymer (A) contains 25% to 50% by mass of a vinyl acetate component derived from the copolymer (a1). The outer coating layer is made of a composition containing 100 parts by mass of a base polymer (B) and 150 to 220 parts by mass of a non-halogen flame retardant.
    Type: Grant
    Filed: September 30, 2015
    Date of Patent: December 3, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Makoto Iwasaki, Motoharu Kajiyama, Yoshiaki Nakamura, Hiroshi Okikawa, Mitsuru Hashimoto, Kenichiro Fujimoto, Akinari Nakayama
  • Patent number: 10225967
    Abstract: A noise suppression cable includes an insulated electric wire including an insulator that covers an outer periphery of a conductor wire, and a magnetic tape layer formed by transversely winding a magnetic tape on an outer periphery of the insulated electric wire. A magnetic body constituting the magnetic tape is cut out from a rolled material in such a manner that a width direction of the magnetic tape corresponds to a rolled direction, and the magnetic body has a magnetic property that is different between the width direction and an orthogonal direction to the width direction.
    Type: Grant
    Filed: March 25, 2015
    Date of Patent: March 5, 2019
    Assignee: HITACHI METALS, LTD.
    Inventors: Katsutoshi Nakatani, Kenji Ajima, Yosuke Sumi, Katsuya Akimoto, Naofumi Chiwata, Hiroshi Okikawa, Yasuharu Muto
  • Patent number: 9991027
    Abstract: An electric wire includes a conductor having a cross-sectional area of not less than 225 mm2 and not more than 275 mm2, an insulation provided so as to cover the outer periphery of the conductor, and a wire sheath provided so as to cover the outer periphery of the insulation. The amount of deflection is not less than 130 mm when, at 23° C., one end of the electric wire is fixed to a fixture table so that another end horizontally protrudes 400 mm from the fixture table and a weight of 2 kg is attached to the other end, and cracks and breaks do not occur when wound with a bending diameter of three times the diameter at ?40° C.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: June 5, 2018
    Assignee: Hitachi Metals, Ltd.
    Inventors: Tamotsu Kibe, Hisao Furuichi, Hiroshi Okikawa, Ryutaro Kikuchi
  • Patent number: 9984792
    Abstract: An electric wire includes a conductor having a cross-sectional area of not less than 290 mm2 and not more than 360 mm2, an insulation provided so as to cover the outer periphery of the conductor, and a wire sheath provided so as to cover the outer periphery of the insulation. The amount of deflection is not less than 120 mm when, at 23° C., one end of the electric wire is fixed to a fixture table so that another end horizontally protrudes 400 mm from the fixture table and a weight of 2 kg is attached to the other end, and cracks and breaks do not occur when wound with a bending diameter of three times the diameter at ?40° C.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: May 29, 2018
    Assignee: Hitachi Metals, Ltd.
    Inventors: Tamotsu Kibe, Hisao Furuichi, Hiroshi Okikawa, Ryutaro Kikuchi
  • Patent number: 9984793
    Abstract: A non-halogen insulating wire with excellent flame resistance as well as high mechanical characteristics (wear resistance) and electrical insulation characteristics is provided. A non-halogen two-layer insulating wire includes: a conductor; and an insulating layer having an insulating inner layer which covers an outer circumference of the conductor and an insulating outer layer which covers an outer circumference of the insulating inner layer. The insulating inner layer is made of a first non-halogen resin composition which contains metal hydroxide and a base polymer (A) including polyolefin, and has a thickness of 20% to 58% of an entire thickness of the insulating layer. The insulating outer layer is made of a second non-halogen resin composition which contains metal hydroxide and a base polymer (B) including polyester resin and/or polyester elastomer resin.
    Type: Grant
    Filed: September 30, 2016
    Date of Patent: May 29, 2018
    Assignee: Hitachi Metals, Ltd.
    Inventors: Makoto Iwasaki, Kohei Arita, Hiroshi Okikawa, Mitsuru Hashimoto
  • Patent number: 9824793
    Abstract: A noise reduction cable includes a plurality of insulated wires, each including a conductor and an insulator that covers a periphery of the conductor; and one or more drain wires, each including a conductor, an insulator that covers a periphery of the conductor, and a magnetic-material layer provided on a periphery of the insulator.
    Type: Grant
    Filed: June 1, 2016
    Date of Patent: November 21, 2017
    Assignee: Hitachi Metals, Ltd.
    Inventors: Katsutoshi Nakatani, Yosuke Sumi, Kenji Ajima, Katsuya Akimoto, Hiroshi Okikawa, Mamoru Ohashi, Yasunori Suzuki
  • Patent number: 9812232
    Abstract: An electric wire includes a conductor having a cross-sectional area of not less than 180 mm2 and not more than 220 mm2, an insulation provided so as to cover the outer periphery of the conductor, and a wire sheath provided so as to cover the outer periphery of the insulation. The amount of deflection is not less than 180 mm when, at 23° C., one end of the electric wire is fixed to a fixture table so that another end horizontally protrudes 400 mm from the fixture table and a weight of 2 kg is attached to the other end, and cracks and breaks do not occur when wound with a bending diameter of three times the diameter at ?40° C.
    Type: Grant
    Filed: November 6, 2015
    Date of Patent: November 7, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Tamotsu Kibe, Hisao Furuichi, Hiroshi Okikawa, Ryutaro Kikuchi
  • Patent number: 9734939
    Abstract: A noise suppression cable includes an insulated wire including a conductor and an insulation covering an outer periphery of the conductor, a shield layer formed on an outer periphery of the insulated wire so as to be polygonal in a cross section thereof, an insulation layer formed on an outer periphery of the shield layer so as to be polygonal in a cross section thereof, and a magnetic tape layer formed on an outer periphery of the insulation layer so as to be polygonal in a cross section thereof.
    Type: Grant
    Filed: May 27, 2016
    Date of Patent: August 15, 2017
    Assignee: Hitachi Metals, Ltd.
    Inventors: Katsutoshi Nakatani, Yosuke Sumi, Kenji Ajima, Katsuya Akimoto, Hiroshi Okikawa
  • Patent number: 9706692
    Abstract: A method of manufacturing a noise shield cable, wherein the noise shield cable includes a conductor, an insulation provided around the conductor, a noise shielding layer provided around the insulation and a sheath provided around the noise shielding layer, includes providing an insulating material including a magnetic powder, pressing and then rolling the insulating material to form a sheet, and winding the sheet around the insulation to form the noise shielding layer. An aspect ratio of the magnetic powder represented by a maximum length/a maximum thickness is more than 10.
    Type: Grant
    Filed: July 12, 2016
    Date of Patent: July 11, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Yosuke Sumi, Katsutoshi Nakatani, Katsuya Akimoto, Hiroshi Okikawa
  • Patent number: 9679688
    Abstract: A shield cable includes an insulated electrical cable of a conductor wire sheathed about the circumference by an insulator, and a magnetic tape layer formed by wrapping magnetic tape about the circumference of the insulated electrical cable. The magnetic tape is a magnetic tape shaped by continuously cutting to constant width an elongated sheet comprising a magnetic material. The magnetic tape, on at least the insulated electrical cable-facing surface thereof, has grooves extending in the lengthwise direction, for accommodating at least one of pairs of burrs that are formed at both widthwise edge surfaces during cutting of the elongated sheet.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: June 13, 2017
    Assignee: Hitachi Metals, Ltd.
    Inventors: Katsuya Akimoto, Naofumi Chiwata, Yosuke Sumi, Katsutoshi Nakatani, Kenji Ajima, Hiroshi Okikawa, Yasuharu Muto
  • Patent number: 9659687
    Abstract: A noise reduction cable includes an insulated wire including an insulator and a wire conductor, an outer circumference of which is coated with the insulator, a magnetic-material layer including a magnetic-material-containing member wound around an outer circumference of the insulated wire, a shield layer with which an outer circumference of the magnetic-material layer is coated, a magnetic-material-fixing-and-insulating tape layer that is disposed between the magnetic-material layer and the shield layer. The magnetic-material-fixing-and-insulating tape layer fixes the magnetic-material layer and insulates the magnetic-material layer and the shield layer from each other.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: May 23, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Katsutoshi Nakatani, Yosuke Sumi, Katsuya Akimoto, Kenji Ajima, Hiroshi Okikawa
  • Patent number: 9640301
    Abstract: An electric wire includes a conductor having a cross-sectional area of not less than 135 mm2 and not more than 165 mm2, an insulation provided so as to cover the outer periphery of the conductor, and a wire sheath provided so as to cover the outer periphery of the insulation. The amount of deflection is not less than 250 mm when, at 23° C., one end of the electric wire is fixed to a fixture table so that another end horizontally protrudes 400 mm from the fixture table and a weight of 2 kg is attached to the other end, and cracks and breaks do not occur when wound with a bending diameter of three times the diameter at ?40° C.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: May 2, 2017
    Assignee: HITACHI METALS, LTD.
    Inventors: Tamotsu Kibe, Hisao Furuichi, Hiroshi Okikawa, Ryutaro Kikuchi
  • Publication number: 20170098492
    Abstract: A non-halogen insulating wire with excellent flame resistance as well as high mechanical characteristics (wear resistance) and electrical insulation characteristics is provided. A non-halogen two-layer insulating wire includes: a conductor; and an insulating layer having an insulating inner layer which covers an outer circumference of the conductor and an insulating outer layer which covers an outer circumference of the insulating inner layer The insulating inner layer is made of a first non-halogen resin composition which contains metal hydroxide and a base polymer (A) including polyolefin, and has a thickness of 20% to 58% of an entire thickness of the insulating layer. The insulating outer layer is made of a second non-halogen resin composition which contains metal hydroxide and a base polymer (B) including polyester resin and/or polyester elastomer resin.
    Type: Application
    Filed: September 30, 2016
    Publication date: April 6, 2017
    Inventors: Makoto IWASAKI, Kohei ARITA, Hiroshi OKIKAWA, Mitsuru HASHIMOTO
  • Publication number: 20170027090
    Abstract: A method of manufacturing a noise shield cable, wherein the noise shield cable includes a conductor, an insulation provided around the conductor, a noise shielding layer provided around the insulation and a sheath provided around the noise shielding layer, includes providing an insulating material including a magnetic powder, pressing and then rolling the insulating material to form a sheet, and winding the sheet around the insulation to form the noise shielding layer. An aspect ratio of the magnetic powder represented by a maximum length/a maximum thickness is more than 10.
    Type: Application
    Filed: July 12, 2016
    Publication date: January 26, 2017
    Inventors: Yosuke SUMI, Katsutoshi NAKATANI, Katsuya AKIMOTO, Hiroshi OKIKAWA
  • Publication number: 20170020037
    Abstract: A noise suppression cable includes an insulated electric wire including an insulator that covers an outer periphery of a conductor wire, and a magnetic tape layer formed by transversely winding a magnetic tape on an outer periphery of the insulated electric wire. A magnetic body constituting the magnetic tape is cut out from a rolled material in such a manner that a width direction of the magnetic tape corresponds to a rolled direction, and the magnetic body has a magnetic property that is different between the width direction and an orthogonal direction to the width direction.
    Type: Application
    Filed: March 25, 2015
    Publication date: January 19, 2017
    Inventors: Katsutoshi NAKATANI, Kenji AJIMA, Yosuke SUMI, Katsuya AKIMOTO, Naofumi CHIWATA, Hiroshi OKIKAWA, Yasuharu MUTO
  • Patent number: 9530542
    Abstract: A shielded cable includes an insulated wire including a conductor wire and an insulation formed around the conductor wire, and a shield layer formed around the insulated wire and including a shield wire. The shield wire includes a tubular member including a conductive material and defining a gap therein, and a magnetic powder is filled in the gap.
    Type: Grant
    Filed: February 10, 2015
    Date of Patent: December 27, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Katsuya Akimoto, Naofumi Chiwata, Yosuke Sumi, Katsutoshi Nakatani, Kenji Ajima, Hiroshi Okikawa, Yasuharu Muto
  • Publication number: 20160358696
    Abstract: A noise shield cable includes an electrically insulated wire including a conductor wire coated with an insulator around a circumference thereof, and a magnetic tape layer including a magnetic tape wound around an outer circumference of the electrically insulated wire at least twice in such a manner as to include a region comprising three or more overlapped layers. A first outermost layer and a second outermost layer of that region are being joined together therebetween by resistance welding.
    Type: Application
    Filed: May 27, 2016
    Publication date: December 8, 2016
    Inventors: YOSUKE SUMI, KATSUTOSHI NAKATANI, KATSUYA AKIMOTO, KENJI AJIMA, HIROSHI OKIKAWA
  • Publication number: 20160358694
    Abstract: A noise reduction cable includes a plurality of insulated wires, each including a conductor and an insulator that covers a periphery of the conductor; and one or more drain wires, each including a conductor, an insulator that covers a periphery of the conductor, and a magnetic-material layer provided on a periphery of the insulator.
    Type: Application
    Filed: June 1, 2016
    Publication date: December 8, 2016
    Inventors: Katsutoshi NAKATANI, Yosuke SUMI, Kenji AJIMA, Katsuya AKIMOTO, Hiroshi OKIKAWA, Mamoru OHASHI, Yasunori SUZUKI
  • Publication number: 20160360654
    Abstract: A noise suppression cable includes an insulated wire including a conductor and an insulation covering an outer periphery of the conductor, a shield layer formed on an outer periphery of the insulated wire so as to be polygonal in a cross section thereof, an insulation layer formed on an outer periphery of the shield layer so as to be polygonal in a cross section thereof, and a magnetic tape layer formed on an outer periphery of the insulation layer so as to be polygonal in a cross section thereof.
    Type: Application
    Filed: May 27, 2016
    Publication date: December 8, 2016
    Inventors: Katsutoshi NAKATANI, Yosuke Sumi, Kenji Ajima, Katsuya Akimoto, Hiroshi Okikawa
  • Patent number: 9508468
    Abstract: A noise suppression cable includes an electrical wire, a first magnetic material including a pair of first surfaces formed along an axis direction of the electrical wire and a convex portion projecting from the first surfaces, and a second magnetic material including a pair of second surfaces disposed on a periphery of the electrical wire, the pair of the second surfaces contacting the pair of the first surfaces such that a tubular shape is formed by the first and second magnetic materials. The first magnetic material and the second magnetic material are configured to generate a compression stress in the convex portion of the first magnetic material by receiving an external force so as to reduce a relative permeability of the convex portion.
    Type: Grant
    Filed: February 13, 2015
    Date of Patent: November 29, 2016
    Assignee: HITACHI METALS, LTD.
    Inventors: Katsutoshi Nakatani, Yosuke Sumi, Kenji Ajima, Katsuya Akimoto, Naofumi Chiwata, Hiroshi Okikawa, Yasuharu Muto