Patents by Inventor Kazuyuki Sohma
Kazuyuki Sohma 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: 9018528Abstract: Provided is a method for producing a wiring harness including a sealing member having higher airtightness, the method including a coat formation step of forming a coat of a composition solution by providing the composition solution that contains at least a photo polymerization initiator, a thermal radical polymerization initiator, and a polymerizable compound to an exposed bunched portion and a coated bunched portion that is adjacent to the exposed bunched portion of the bunch of electric wires, and a curing step of irradiating the coat formed on the exposed bunched portion and the adjacent coated bunched portion with light to photocure the coat and to thermally cure the coat by heat of the photocure and heat of collected light.Type: GrantFiled: November 19, 2010Date of Patent: April 28, 2015Assignees: Autonetworks Technologies, Ltd., Sumitomo Wiring Sytems, Ltd., Sumitomo Electric Industries, Ltd.Inventors: Tatsuya Kakuta, Takehiro Hosokawa, Kazuyuki Sohma, Tomoyuki Hattori
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Patent number: 8989543Abstract: An optical cable comprises an optical fiber ribbon, a tension member and a sheath. The optical fiber ribbon is constructed by integrating a plurality of optical fibers arranged in parallel. The sheath is provided so as to surround the optical fiber ribbon. The sheath is used for protecting the optical cable. One optical fiber ribbon is arranged twistably within an inner space surrounded by the sheath.Type: GrantFiled: November 15, 2012Date of Patent: March 24, 2015Assignee: Sumitomo Electric Industries, Ltd.Inventors: Yuya Homma, Itaru Sakabe, Kazuyuki Sohma
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Publication number: 20140376866Abstract: An optical fiber includes a core, a clad and a coating layer. The core is made of glass, has a higher refractive index than that of the clad, and can guide propagating light. The clad surrounding the core is made of glass or plastic. The coating layer surrounding the clad is made of plastic. The core has a diameter d1 of from 70 to 105 ?m. The clad has a diameter d2 of from 80 to 130 ?m. The glass has a diameter of from 70 to 130 ?m. The coating layer has a thickness t3 of from 12.5 to 85 ?m. The optical fiber has an effective numerical aperture NA of from 0.28 to 0.35. The optical fiber of this embodiment has a transmission loss of 20 dB/km or smaller and a transmission bandwidth of 40 MHz·km or larger at an 850-nm wavelength.Type: ApplicationFiled: December 27, 2012Publication date: December 25, 2014Inventors: Itaru Sakabe, Yuya Homma, Tomoyuki Hattori, Kazuyuki Sohma
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Publication number: 20140270669Abstract: An optical fiber sheet 10 includes an optical fiber 11 and a wire 12 that are arranged between a first sheet and a second sheet. The optical fiber 11 is a multi-mode optical fiber having a core of silica glass to which a refractive index adjuster is added, has a numerical aperture equal to or less than 0.30 and a flexural rigidity equal to or less than 0.50 N·mm2, and is bent to be arranged between the first sheet and the second sheet. The wire 12 intersects the optical fiber 11 between the first sheet and the second sheet.Type: ApplicationFiled: October 3, 2012Publication date: September 18, 2014Inventors: Kazuyuki Sohma, Kazuhiro Kuwa, Toshifumi Hosoya, Masumi Ito, Seiko Mitachi
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Publication number: 20140199040Abstract: Provided is an optical fiber which is provided with heat resistance and productivity and in which a transmission loss is suppressed even in a high-temperature environment. It has, on an outer periphery of a glass fiber composed of a core part and a cladding part, a coating layer made by crosslinking an energy-curable resin composition containing a silicon compound, in which the silicon compound contained in the energy-curable resin composition of the coating layer as an outermost layer has a specified structure having a cyclic silicone site having an epoxy group and a linear silicone site, with the content of the cyclic silicone site in the compound being from 10 to 30% by mass.Type: ApplicationFiled: May 10, 2012Publication date: July 17, 2014Applicants: ADEKA CORPORATION, SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuyuki Sohma, Tomoyuki Hattori, Takashi Sueyoshi, Seiichi Saito, Koichi Sakamaki
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Publication number: 20140178019Abstract: In an optical cable 1, the ratio of the inner diameter ID to the outer diameter OD of a tube 20 is 0.5 or less, and thus the tube 20 has a comparatively thick wall. Consequently, even when the optical cable 1 is bent to a small bend radius of, for example, approximately 2 mm, a kink in a portion of the tube 20 corresponding to the inner side of the bending is suppressed. As a result, damage to a coated optical fiber 10 or an increase in transmission loss arising from the occurrence of a kink in the tube 20 is suppressed.Type: ApplicationFiled: December 27, 2012Publication date: June 26, 2014Inventors: Itaru Sakabe, Yuya Homma, Tomoyuki Hattori, Kazuyuki Sohma
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Patent number: 8634687Abstract: A coated plastic cladding optical fiber and an optical fiber cable, in which a transmission loss caused when this coated fiber or this fiber cable is bent in a small radius is small, and which can be used sufficiently as a USB cable or a HDMI cable in a high speed transmission, are provided. The coated plastic cladding optical fiber 1 has a cladding layer 3 that is formed on an outer periphery of a core glass 2 made of a quartz glass and formed of a polymer resin whose refractive index is lower than core glass, and a resin coating layer 5 that is formed on an outer periphery of the cladding layer 3 and is formed of a thermosetting resin. Then, a diameter of the core glass 2 is set to 50 to 100 ?m, and a relative index difference of the core glass 2 to the cladding layer 3 is set to 3.7% or more.Type: GrantFiled: April 18, 2011Date of Patent: January 21, 2014Assignee: Sumitomo Electric Industries, Ltd.Inventors: Itaru Sakabe, Kazuyuki Sohma, Tomoyuki Hattori, Takashi Takada, Toshiaki Kakii
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Patent number: 8483532Abstract: A plastic-cladding optical fiber is provided. The plastic-cladding optical fiber is provided includes: a core layer made of quartz glass; and a cladding layer formed by hardening a curable resin composition over a periphery of the core layer. Adhesion between the core layer and the cladding layer ranges 1.5 g/mm to 4.0 g/mm.Type: GrantFiled: January 25, 2011Date of Patent: July 9, 2013Assignee: Sumitomo Electric Industries, Ltd.Inventors: Kazuyuki Sohma, Takashi Takada, Itaru Sakabe
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Publication number: 20120261186Abstract: Provided is a method for producing a wiring harness including a sealing member having higher airtightness, the method including a coat formation step of forming a coat of a composition solution by providing the composition solution that contains at least a photo polymerization initiator, a thermal radical polymerization initiator, a redox catalyst and a polymerizable compound to an exposed bunched portion and a coated bunched portion that is adjacent to the exposed bunched portion of the bunch of electric wires, and a light irradiation step of irradiating the coat formed on the exposed bunched portion and the adjacent coated bunched portion with light to photocure the coat.Type: ApplicationFiled: November 19, 2010Publication date: October 18, 2012Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO WIRING SYSTEMS, LTD.Inventors: Tatsuya Kakuta, Takehiro Hosokawa, Kazuyuki Sohma, Tomoyuki Hattori
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Publication number: 20120247828Abstract: Provided is a method for producing a wiring harness including a sealing member having higher airtightness, the method including a coat formation step of forming a coat of a composition solution by providing the composition solution that contains at least a photo polymerization initiator, a thermal radical polymerization initiator, and a polymerizable compound to an exposed bunched portion and a coated bunched portion that is adjacent to the exposed bunched portion of the bunch of electric wires, and a curing step of irradiating the coat formed on the exposed bunched portion and the adjacent coated bunched portion with light to photocure the coat and to thermally cure the coat by heat of the photocure and heat of collected light.Type: ApplicationFiled: November 19, 2010Publication date: October 4, 2012Applicants: AUTONETWORKS TECHNOLOGIES, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD., SUMITOMO WIRING SYSTEMS, LTD.Inventors: Tatsuya Kakuta, Takehiro Hosokawa, Kazuyuki Sohma, Tomoyuki Hattori
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Publication number: 20120177329Abstract: A coated plastic cladding optical fiber and an optical fiber cable, in which a transmission loss caused when this coated fiber or this fiber cable is bent in a small radius is small, and which can be used sufficiently as a USB cable or a HDMI cable in a high speed transmission, are provided. The coated plastic cladding optical fiber 1 has a cladding layer 3 that is formed on an outer periphery of a core glass 2 made of a quartz glass and formed of a polymer resin whose refractive index is lower than core glass, and a resin coating layer 5 that is formed on an outer periphery of the cladding layer 3 and is formed of a thermosetting resin. Then, a diameter of the core glass 2 is set to 50 to 100 ?m, and a relative index difference of the core glass 2 to the cladding layer 3 is set to 3.7% or more.Type: ApplicationFiled: April 18, 2011Publication date: July 12, 2012Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Itaru Sakabe, Kazuyuki Sohma, Tomoyuki Hattori, Takashi Takada, Toshiaki Kakii
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Publication number: 20110182556Abstract: A plastic-cladding optical fiber is provided. The plastic-cladding optical fiber is provided includes: a core layer made of quartz glass; and a cladding layer formed by hardening a curable resin composition over a periphery of the core layer. Adhesion between the core layer and the cladding layer ranges 1.5 g/mm to 4.0 g/mm.Type: ApplicationFiled: January 25, 2011Publication date: July 28, 2011Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.Inventors: Kazuyuki SOHMA, Takashi Takada, Itaru Sakabe
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Patent number: 6997016Abstract: Stress exerted on an inner or outer circumferential side of a glass tube 6 is controlled when a glass material 3 is heated and softened by a heating element 41 provided around the glass material 3 and a piercing plug 31 is relatively pressed into a softened region of the glass material 3 to thereby form the glass material 3 into the glass tube 6 gradually. For example, the control of the stress can be carried out by controlling an internal or external pressure of the glass tube 6. As a result, the deformation of the glass tube 6 just after piercing is prevented so that the glass tube 6 can be obtained with high quality. It is also possible to solve the problem that cracks may occur easily at the time of reheating because of residual stress distribution after cooling.Type: GrantFiled: March 10, 2004Date of Patent: February 14, 2006Assignee: Sumitomo Electric Industries, Ltd.Inventors: Tomomi Moriya, Masashi Onishi, Kazuyuki Sohma, Masaaki Hirano, Eiji Yanada, Tadashi Enomoto
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Publication number: 20040231361Abstract: Stress exerted on an inner or outer circumferential side of a glass tube 6 is controlled when a glass material 3 is heated and softened by a heating element 41 provided around the glass material 3 and a piercing plug 31 is relatively pressed into a softened region of the glass material 3 to thereby form the glass material 3 into the glass tube 6 gradually. For example, the control of the stress can be carried out by controlling an internal or external pressure of the glass tube 6. As a result, the deformation of the glass tube 6 just after piercing is prevented so that the glass tube 6 can be obtained with high quality. It is also possible to solve the problem that cracks may occur easily at the time of reheating because of residual stress distribution after cooling.Type: ApplicationFiled: March 10, 2004Publication date: November 25, 2004Applicant: Sumitomo Electric Industries, Ltd.Inventors: Tomomi Moriya, Masashi Onishi, Kazuyuki Sohma, Masaaki Hirano, Eiji Yanada, Tadashi Enomoto