Patents by Inventor Kenji AJIMA
Kenji AJIMA 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: 10659043Abstract: A proximity sensor includes a sensor cable that includes a first electrode wire and a second electrode wire arranged parallel to each other, an insulation covering both the first electrode wire and the second electrode wire, and a shield partially covering a surface of the insulation so as to form an opening, the first electrode wire and the second electrode wire being arranged to have different distances to the opening, and a detector circuit that includes a first capacitance detecting portion for detecting a first capacitance to be detected by the first electrode wire, a second capacitance detecting portion for detecting a second capacitance to be detected by the second electrode wire, and a differential output portion for outputting a difference between the first capacitance and the second capacitance.Type: GrantFiled: March 20, 2018Date of Patent: May 19, 2020Assignee: Hitachi Metals, Ltd.Inventors: Katsutoshi Nakatani, Kenji Ajima, Katsuya Akimoto
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Patent number: 10225967Abstract: 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: GrantFiled: March 25, 2015Date of Patent: March 5, 2019Assignee: HITACHI METALS, LTD.Inventors: Katsutoshi Nakatani, Kenji Ajima, Yosuke Sumi, Katsuya Akimoto, Naofumi Chiwata, Hiroshi Okikawa, Yasuharu Muto
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Publication number: 20180316348Abstract: A proximity sensor includes a sensor cable that includes a first electrode wire and a second electrode wire arranged parallel to each other, an insulation covering both the first electrode wire and the second electrode wire, and a shield partially covering a surface of the insulation so as to form an opening, the first electrode wire and the second electrode wire being arranged to have different distances to the opening, and a detector circuit that includes a first capacitance detecting portion for detecting a first capacitance to be detected by the first electrode wire, a second capacitance detecting portion for detecting a second capacitance to be detected by the second electrode wire, and a differential output portion for outputting a difference between the first capacitance and the second capacitance.Type: ApplicationFiled: March 20, 2018Publication date: November 1, 2018Applicant: Hitachi Metals, Ltd.Inventors: Katsutoshi NAKATANI, Kenji AJIMA, Katsuya AKIMOTO
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Patent number: 9824793Abstract: 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: GrantFiled: June 1, 2016Date of Patent: November 21, 2017Assignee: Hitachi Metals, Ltd.Inventors: Katsutoshi Nakatani, Yosuke Sumi, Kenji Ajima, Katsuya Akimoto, Hiroshi Okikawa, Mamoru Ohashi, Yasunori Suzuki
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Patent number: 9734939Abstract: 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: GrantFiled: May 27, 2016Date of Patent: August 15, 2017Assignee: Hitachi Metals, Ltd.Inventors: Katsutoshi Nakatani, Yosuke Sumi, Kenji Ajima, Katsuya Akimoto, Hiroshi Okikawa
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Patent number: 9679688Abstract: 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: GrantFiled: February 27, 2014Date of Patent: June 13, 2017Assignee: Hitachi Metals, Ltd.Inventors: Katsuya Akimoto, Naofumi Chiwata, Yosuke Sumi, Katsutoshi Nakatani, Kenji Ajima, Hiroshi Okikawa, Yasuharu Muto
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Patent number: 9659687Abstract: 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: GrantFiled: April 8, 2016Date of Patent: May 23, 2017Assignee: HITACHI METALS, LTD.Inventors: Katsutoshi Nakatani, Yosuke Sumi, Katsuya Akimoto, Kenji Ajima, Hiroshi Okikawa
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Publication number: 20170020037Abstract: 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: ApplicationFiled: March 25, 2015Publication date: January 19, 2017Inventors: Katsutoshi NAKATANI, Kenji AJIMA, Yosuke SUMI, Katsuya AKIMOTO, Naofumi CHIWATA, Hiroshi OKIKAWA, Yasuharu MUTO
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Patent number: 9530542Abstract: 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: GrantFiled: February 10, 2015Date of Patent: December 27, 2016Assignee: HITACHI METALS, LTD.Inventors: Katsuya Akimoto, Naofumi Chiwata, Yosuke Sumi, Katsutoshi Nakatani, Kenji Ajima, Hiroshi Okikawa, Yasuharu Muto
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Publication number: 20160358696Abstract: 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: ApplicationFiled: May 27, 2016Publication date: December 8, 2016Inventors: YOSUKE SUMI, KATSUTOSHI NAKATANI, KATSUYA AKIMOTO, KENJI AJIMA, HIROSHI OKIKAWA
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Publication number: 20160358694Abstract: 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: ApplicationFiled: June 1, 2016Publication date: December 8, 2016Inventors: Katsutoshi NAKATANI, Yosuke SUMI, Kenji AJIMA, Katsuya AKIMOTO, Hiroshi OKIKAWA, Mamoru OHASHI, Yasunori SUZUKI
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Publication number: 20160360654Abstract: 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: ApplicationFiled: May 27, 2016Publication date: December 8, 2016Inventors: Katsutoshi NAKATANI, Yosuke Sumi, Kenji Ajima, Katsuya Akimoto, Hiroshi Okikawa
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Publication number: 20160360653Abstract: A noise shield cable is comprising an electrically insulated wire comprising a conductor wire coated with an insulator around a circumference thereof, and a magnetic tape layer comprising a magnetic tape wound around an outer circumference of the electrically insulated wire. Both ends of the magnetic tape are being overlapped together. Overlapped portions of the magnetic tape include a joining portion and are being joined by resistance welding at the joining portion. The joining portion of the magnetic tape joined by resistance welding has a maximum length in a cable longitudinal direction of not greater than ? a width of the magnetic tape.Type: ApplicationFiled: May 27, 2016Publication date: December 8, 2016Inventors: Yosuke SUMI, Katsutoshi NAKATANI, Katsuya AKIMOTO, Kenji AJIMA, Hiroshi OKI KAWA
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Patent number: 9508468Abstract: 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: GrantFiled: February 13, 2015Date of Patent: November 29, 2016Assignee: HITACHI METALS, LTD.Inventors: Katsutoshi Nakatani, Yosuke Sumi, Kenji Ajima, Katsuya Akimoto, Naofumi Chiwata, Hiroshi Okikawa, Yasuharu Muto
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Publication number: 20160314875Abstract: 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: ApplicationFiled: April 8, 2016Publication date: October 27, 2016Inventors: Katsutoshi NAKATANI, Yosuke SUMI, Katsuya AKIMOTO, Kenji AJIMA, Hiroshi OKIKAWA
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Patent number: 9455071Abstract: A noise suppression cable includes a conductor wire, and a magnetic insulation layer on a periphery of the conductor wire. The magnetic insulation layer includes an insulating material and two or more types of magnetic powders that have different frequency characteristics from each other.Type: GrantFiled: June 5, 2015Date of Patent: September 27, 2016Assignee: Hitachi Metals, Ltd.Inventors: Yosuke Sumi, Naofumi Chiwata, Katsuya Akimoto, Katsutoshi Nakatani, Hiroshi Komuro, Kenji Ajima, Hiroshi Okikawa, Yasuharu Muto
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Publication number: 20160211060Abstract: 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: ApplicationFiled: February 27, 2014Publication date: July 21, 2016Inventors: Katsuya AKIMOTO, Naofumi CHIWATA, Yosuke SUMI, Katsutoshi NAKATANI, Kenji AJIMA, Hiroshi OKIKAWA, Yasuharu MUTO
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Patent number: 9396841Abstract: A noise suppression cable includes a plurality of twisted pair wires, an inclusion that includes an insulating material and a magnetic powder and separates the plurality of twisted pair wires, and a sheath that includes an insulating material and covers a periphery of the plurality of twisted pair wires and the inclusion.Type: GrantFiled: January 27, 2015Date of Patent: July 19, 2016Assignee: Hitachi Metals, Ltd.Inventors: Yosuke Sumi, Naofumi Chiwata, Katsuya Akimoto, Katsutoshi Nakatani, Kenji Ajima, Hiroshi Okikawa, Yasuharu Muto
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Publication number: 20150357087Abstract: A noise suppression cable includes a conductor wire, and a magnetic insulation layer on a periphery of the conductor wire. The magnetic insulation layer includes an insulating material and two or more types of magnetic powders that have different frequency characteristics from each other.Type: ApplicationFiled: June 5, 2015Publication date: December 10, 2015Inventors: Yosuke SUMI, Naofumi Chiwata, Katsuya Akimoto, Katsutoshi Nakatani, Hiroshi Komuro, Kenji Ajima, Hiroshi Okikawa, Yasuharu Muto
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Publication number: 20150235738Abstract: 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: ApplicationFiled: February 13, 2015Publication date: August 20, 2015Inventors: Katsutoshi NAKATANI, Yosuke SUMI, Kenji AJIMA, Katsuya AKIMOTO, Naofumi CHIWATA, Hiroshi OKIKAWA, Yasuharu MUTO