Patents by Inventor Yusuke KASHIWAGI
Yusuke KASHIWAGI 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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Publication number: 20240140853Abstract: A manufacturing method of glass base material for optical fiber in which occurrence of opaque glass portion and elongation can be suppressed is provided. A preparation step of porous base material for optical fiber in which a porous glass layer is formed around the periphery of a core rod; a sintering preparation step, in which the porous base material for optical fiber is hung in a furnace core tube of a sintering apparatus; and a sintering step in which a mixture of halogen-containing gas and inert gas is flowing into the furnace core tube and the porous base material for optical fiber is made into transparent glass by heating the porous base material for optical fiber while moving the heater relative to the porous base material for optical fiber from one end of the core rod to the other end, to obtain glass base material for optical fiber, are performed.Type: ApplicationFiled: September 29, 2023Publication date: May 2, 2024Applicant: Shin-Etsu Chemical Co., Ltd.Inventor: Yusuke KASHIWAGI
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Patent number: 11787726Abstract: A sintering apparatus comprising: a furnace core tube containing a porous glass base material for optical fiber whose longitudinal direction is along the axial direction; and a multi-stage heater in which two or more heaters surround the furnace core tube and are arranged in the axial direction of the furnace core tube to form a heating area in the furnace core tube, is used. The sintering method includes a step in which the base material is heated in the heating area to perform a first dehydration process; and a step in which the base material is moved so that the position in the longitudinal direction of the base material where the dehydration was identified as the most insufficient, is at the position in the axial direction of the furnace core tube where the temperature is highest in the heating area, and then a second dehydration process is performed.Type: GrantFiled: January 21, 2022Date of Patent: October 17, 2023Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventor: Yusuke Kashiwagi
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Publication number: 20220234935Abstract: A sintering apparatus comprising: a furnace core tube containing a porous glass base material for optical fiber whose longitudinal direction is along the axial direction; and a multi-stage heater in which two or more heaters surround the furnace core tube and are arranged in the axial direction of the furnace core tube to form a heating area in the furnace core tube, is used. The sintering method includes a step in which the base material is heated in the heating area to perform a first dehydration process; and a step in which the base material is moved so that the position in the longitudinal direction of the base material where the dehydration was identified as the most insufficient, is at the position in the axial direction of the furnace core tube where the temperature is highest in the heating area, and then a second dehydration process is performed.Type: ApplicationFiled: January 21, 2022Publication date: July 28, 2022Applicant: Shin-Etsu Chemical Co., Ltd.Inventor: Yusuke KASHIWAGI
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Publication number: 20220119299Abstract: Provided is a method of fabricating an optical fiber glass base material, the method including a first step for dehydrating an optical fiber porous base material while causing a gas that includes at least a halogen or argon to distribute within a quartz core tube that accommodates the optical fiber porous base material; a second step for, after the first step, at least partially ventilating within the quartz core tube by causing a gas having helium as a main component to distribute within the quartz core tube; and a third step for, after the second step, transparently vitrifying the optical fiber porous base material while causing the gas having helium as a main component to distribute within the quartz core tube.Type: ApplicationFiled: October 12, 2021Publication date: April 21, 2022Inventor: Yusuke KASHIWAGI
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Patent number: 10570050Abstract: Provided is a manufacturing apparatus for manufacturing a soot deposition body, including a main burner that deposits glass microparticles on a target rod while moving parallel to a longitudinal direction of the target rod; and a side burner that is positioned outside of a movement range of the main burner in a movement direction of the main burner, and fires an end portion of the soot deposition body formed on the target rod. The side burner includes a plurality of heating burners arranged distanced from each other in a circumferential direction of the target rod. In the manufacturing apparatus described above, the main burner may include a plurality of deposition burners that are arranged distanced from each other in the circumferential direction of the target rod.Type: GrantFiled: August 14, 2017Date of Patent: February 25, 2020Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yusuke Kashiwagi, Tomihisa Yanaga
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Patent number: 10532944Abstract: In order to improve the yield of an optical fiber base material, provided is a manufacturing apparatus for manufacturing an optical fiber base material by forming a soot deposition body on a surface of a target rod, including a main burner that generates glass microparticles to be deposited on the target rod while moving in a longitudinal direction of the target rod; a pair of side burners that are arranged outside a movement range of the main burner and heat both ends of the soot deposition body formed on the surface of the target rod; and a shielding member that prevents the glass microparticles generated by the main burner from being deposited on the target rod farther outward than a segment of the target rod sandwiched by the pair of side burners.Type: GrantFiled: August 21, 2017Date of Patent: January 14, 2020Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yusuke Kashiwagi, Tetsuya Otosaka
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Patent number: 10086441Abstract: To prevent a lowering of gripping force due to temperature changes, provided is a gripping mechanism including a plurality of chuck claws that, when having come close to each other, generate a gripping force on a gripped body; a chuck body that holds the plurality of chuck claws on a common planar surface, and moves them on the planar surface; and a plurality of chuck plates that, when each of the plurality of chuck claws grips the gripped body, are interposed between each of the plurality of chuck claws and the gripped body. A thermal expansion coefficient ?1 of the plurality of chuck claws, a thermal expansion coefficient ?2 of the plurality of chuck plates and a thermal expansion coefficient ?W of the gripped body have a relationship indicated by ?W<?1<?2??(Equation 1).Type: GrantFiled: September 23, 2016Date of Patent: October 2, 2018Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yusuke Kashiwagi, Tetsuya Otosaka
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Publication number: 20180050951Abstract: Provided is a manufacturing apparatus for manufacturing a soot deposition body, including a main burner that deposits glass microparticles on a target rod while moving parallel to a longitudinal direction of the target rod; and a side burner that is positioned outside of a movement range of the main burner in a movement direction of the main burner, and fires an end portion of the soot deposition body formed on the target rod. The side burner includes a plurality of heating burners arranged distanced from each other in a circumferential direction of the target rod. In the manufacturing apparatus described above, the main burner may include a plurality of deposition burners that are arranged distanced from each other in the circumferential direction of the target rod.Type: ApplicationFiled: August 14, 2017Publication date: February 22, 2018Inventors: Yusuke KASHIWAGI, Tomihisa YANAGA
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Publication number: 20180050950Abstract: In order to improve the yield of an optical fiber base material, provided is a manufacturing apparatus for manufacturing an optical fiber base material by forming a soot deposition body on a surface of a target rod, including a main burner that generates glass microparticles to be deposited on the target rod while moving in a longitudinal direction of the target rod; a pair of side burners that are arranged outside a movement range of the main burner and heat both ends of the soot deposition body formed on the surface of the target rod; and a shielding member that prevents the glass microparticles generated by the main burner from being deposited on the target rod farther outward than a segment of the target rod sandwiched by the pair of side burners.Type: ApplicationFiled: August 21, 2017Publication date: February 22, 2018Inventors: Yusuke KASHIWAGI, Tetsuya OTOSAKA
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Publication number: 20170087642Abstract: A gripping mechanism includes: a plurality of chuck claws that, when having come close to each other, generate a gripping force on a gripped body; a chuck body that holds the plurality of chuck claws on a common planar surface, and moves them on the planar surface; and a plurality of chuck plates that, when each of the plurality of chuck claws grips the gripped body, are interposed between each of the plurality of chuck claws and the gripped body, wherein a thermal expansion coefficient ?l of the plurality of chuck claws, a thermal expansion coefficient ?2 of the plurality of chuck plates and a thermal expansion coefficient ?W of the gripped body has a relationship indicated by Equation 1: ?W<?1<?2 ??(Equation 1)Type: ApplicationFiled: September 23, 2016Publication date: March 30, 2017Inventors: Yusuke KASHIWAGI, Tetsuya OTOSAKA