Patents by Inventor Fumitaka Nakahigashi
Fumitaka Nakahigashi 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: 7291786Abstract: A differential signal transmission cable has four stranded cores, each formed of an inner conductor covered with an insulation of fluorocarbon resin; an outer conductor being spirally wrapped around the four stranded cores in the opposite direction to a stranding direction of the cores; and a sheath formed around the outer conductor, where the diameter of the cable is 1.0 mm or less.Type: GrantFiled: April 7, 2005Date of Patent: November 6, 2007Assignee: Hitachi Cable, Ltd.Inventors: Hakaru Matsui, Hiroshi Komuro, Nobuhito Akutsu, Fumitaka Nakahigashi
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Publication number: 20070068696Abstract: A differential signal transmission cable has four stranded cores, each formed of an inner conductor covered with an insulation of fluorocarbon resin; an outer conductor being spirally wrapped around the four stranded cores in the opposite direction to a stranding direction of the cores; and a sheath formed around the outer conductor, where the diameter of the cable is 1.0 mm or less.Type: ApplicationFiled: April 7, 2005Publication date: March 29, 2007Inventors: Hakaru Matsui, Hiroshi Komuro, Nobuhito Akutsu, Fumitaka Nakahigashi
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Patent number: 6649843Abstract: This invention provides a composite conductor having excellent strength, flexing resistance and corrosion resistance, a production method thereof and a cable employing the same composite conductor. A corrosion resistant layer is formed of Au, Ag, Sn, Ni, solder, Zn, Pd, Sn—Ni alloy, Ni—Co alloy, Ni—P alloy, Ni—Co—P alloy, Cu—Zn alloy, Sn—Bi alloy, Sn—Ag—cu alloy, Sn—Cu alloy or Sn—Zn alloy in the thickness of 0.5 &mgr;m or more on an external periphery of a core made of copper-metal fiber conductor. A wire material made of the copper-metal fiber conductor is subjected to area reduction processing. In the middle of the area reduction processing or after the area reduction processing is completed, corrosion resistant layer is formed on the periphery of the wire material in the thickness of 0.Type: GrantFiled: April 16, 2001Date of Patent: November 18, 2003Assignee: Hitachi Cable, Ltd.Inventors: Seigi Aoyama, Koichi Tamura, Takaaki Ichikawa, Hakaru Matsui, Osamu Seya, Fumitaka Nakahigashi
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Publication number: 20030019661Abstract: This invention provides a composite conductor having excellent strength, flexing resistance and corrosion resistance, a production method thereof and a cable employing the same composite conductor. A corrosion resistant layer is formed of Au, Ag, Sn, Ni, solder, Zn, Pd, Sn—Ni alloy, Ni—Co alloy, Ni—P alloy, Ni—Co—P alloy, Cu—Zn alloy, Sn—Bi alloy, Sn—Ag—cu alloy, Sn—Cu alloy or Sn—Zn alloy in the thickness of 0.5 &mgr;m or more on an external periphery of a core made of copper-metal fiber conductor. A wire material made of the copper-metal fiber conductor is subjected to area reduction processing. In the middle of the area reduction processing or after the area reduction processing is completed, corrosion resistant layer is formed on the periphery of the wire material in the thickness of 0.Type: ApplicationFiled: April 16, 2001Publication date: January 30, 2003Inventors: Seigi Aoyama, Koichi Tamura, Takaaki Ichikawa, Hakaru Matsui, Osamu Seya, Fumitaka Nakahigashi
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Patent number: 6431004Abstract: Support members are provided on the terminal portions of a sensor main body. In this state, a seal portion is formed by molding, and the seal portion seals the terminal portions of the sensor main body. During molding, external pressure acts on a housing. However, since four electrode wires pulled out from the housing are supported by insulating support members, the four electrode wires do not contact one another due to the pressure applied during molding, and thus do not short-circuit.Type: GrantFiled: January 8, 2001Date of Patent: August 13, 2002Assignee: Asmo Co., Ltd. & Hitachi Cable, Ltd.Inventors: Hidenori Ishihara, Noboru Tsuge, Shigeru Kashiwazaki, Fumitaka Nakahigashi, Koji Horii
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Patent number: 6349461Abstract: Support members are provided on the terminal portions of a sensor main body. In this state, a seal portion is formed by molding, and the seal portion seals the terminal portions of the sensor main body. During molding, external pressure acts on a housing. However, since four electrode wires pulled out from the housing are supported by insulating support members, the four electrode wires do not contact one another due to the pressure applied during molding, and thus do not short-circuit.Type: GrantFiled: January 8, 2001Date of Patent: February 26, 2002Assignees: ASMO Co., Ltd., Hitachi Cable, Ltd.Inventors: Hidenori Ishihara, Noboru Tsuge, Shigeru Kashiwazaki, Fumitaka Nakahigashi, Koji Horii
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Publication number: 20010049964Abstract: Support members are provided on the terminal portions of a sensor main body. In this state, a seal portion is formed by molding, and the seal portion seals the terminal portions of the sensor main body. During molding, external pressure acts on a housing. However, since four electrode wires pulled out from the housing are supported by insulating support members, the four electrode wires do not contact one another due to the pressure applied during molding, and thus do not short-circuit.Type: ApplicationFiled: January 8, 2001Publication date: December 13, 2001Applicant: ASMO CO., LTD. and HITACHI CABLE, LTD.Inventors: Hidenori Ishihara, Noboru Tsuge, Shigeru Kashiwazaki, Fumitaka Nakahigashi, Koji Horii
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Patent number: 6260418Abstract: Support members are provided on the terminal portions of a sensor main body. In this state, a seal portion is formed by molding, and the seal portion seals the terminal portions of the sensor main body. During molding, external pressure acts on a housing. However, since four electrode wires pulled out from the housing are supported by insulating support members, the four electrode wires do not contact one another due to the pressure applied during molding, and thus do not short-circuit.Type: GrantFiled: December 15, 1998Date of Patent: July 17, 2001Assignees: Asmo Co., Ltd., Hitachi Cable, LTDInventors: Hidenori Ishihara, Noboru Tsuge, Shigeru Kashiwazaki, Fumitaka Nakahigashi, Koji Horii
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Publication number: 20010001930Abstract: Support members are provided on the terminal portions of a sensor main body. In this state, a seal portion is formed by molding, and the seal portion seals the terminal portions of the sensor main body. During molding, external pressure acts on a housing. However, since four electrode wires pulled out from the housing are supported by insulating support members, the four electrode wires do not contact one another due to the pressure applied during molding, and thus do not short-circuit.Type: ApplicationFiled: January 8, 2001Publication date: May 31, 2001Applicant: ASMO CO., LTD. and HITACHI CABLE, LTD.Inventors: Hidenori Ishihara, Noboru Tsuge, Shigeru Kashiwazaki, Fumitaka Nakahigashi, Koji Horii
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Patent number: 6122431Abstract: An optical transmission member comprising a core and a clad provided on the core is provided, wherein the core consists of silicon rubber and the clad consists of tetrafluoroethylene/hexafluoropropylene/fluorovinylidene copolymer cross-linked by electron-beam, whereby an optical transmission member having improved transmission characteristics, heat resistance, flexibility and strength against buckling is provided.Type: GrantFiled: September 18, 1998Date of Patent: September 19, 2000Assignee: Hitachi Cable, Ltd.Inventors: Tomiya Abe, Yoshikazu Hayakawa, Masanori Matsumoto, Kouki Hirano, Fumitaka Nakahigashi
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Patent number: 5857761Abstract: An illumination device comprises a light source like a halogen lamp, a light guide, a round rod-shaped transparent radiation member having a proximal end and a distal end, and a transparent radiation plate. The light guide is a plastic optical fiber comprising a single core of silicon rubber and a cladding layer of tetrafluoroethylene/hexafluoropropylene copolymer. The radiation member is a transparent circular cylinder made of acrylic resin, and has a predetermined pattern of light scattering regions on its surface oppose the directions where the light is radiated. The radiation plate is placed such a position that one side plane of the radiation plate oppose to he radiation member, and also has a predetermined pattern of light scattering regions on the back. The light scattering regions are provided along said radiation member in such a way that a ratio of an tea of one region to that of adjacent region becomes larger as the one region becomes distant from the proximal and of the radiation member.Type: GrantFiled: April 3, 1997Date of Patent: January 12, 1999Assignee: Hitachi Cable, Ltd.Inventors: Tomiya Abe, Kouki Hirano, Fumitaka Nakahigashi, Masanori Matsumoto, Yoshikazu Hayakawa, Tohru Sasaki