Patents by Inventor Takaharu Yamaguchi
Takaharu Yamaguchi 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: 11364591Abstract: In an outer blade cutting wheel comprising an annular thin disc base of cemented carbide having an outer diameter of 80-200 mm, an inner diameter of 30-80 mm, and a thickness of 0.1-1.0 mm, and a blade section disposed on an outer periphery of the base, the blade section comprises diamond grains and/or CBN grains bound with a metal bond having a Young's modulus of 0.7-4.0×1011 Pa and has a thickness which is greater than the thickness of the base by at least 0.01 mm. The outer blade cutting wheel is capable of cutting a workpiece at a high accuracy and a reduced allowance, improves machining yields, and reduces machining costs.Type: GrantFiled: March 27, 2014Date of Patent: June 21, 2022Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masaki Kasashima, Takehisa Minowa, Takaharu Yamaguchi, Koji Sato
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Patent number: 9314892Abstract: In a method for multiple cutoff machining a rare earth magnet block, a cutting fluid feed nozzle having a plurality of slits is combined with a plurality of cutoff abrasive blades coaxially mounted on a rotating shaft, each said blade comprising a base disk and a peripheral cutting part. The slits in the feed nozzle into which the outer peripheral portions of cutoff abrasive blades are inserted serve to restrict any axial run-out of the cutoff abrasive blades during rotation. Cutting fluid is fed from the feed nozzle through slits to the rotating cutoff abrasive blades and eventually to points of cutoff machining on the magnet block.Type: GrantFiled: July 20, 2012Date of Patent: April 19, 2016Assignee: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Koji Sato, Takehisa Minowa, Takaharu Yamaguchi, Takayuki Hasegawa, Kazuhito Akada
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Patent number: 8820729Abstract: When a rare earth magnet block is cut or ground by a cutting or grinding tool, a jig is used for holding the magnet block in place. The jig comprises a base, a pair of metal support members disposed on opposite sides of the base and provided with grooves, and rubber rods received in the support member grooves such that the rubber rod partially protrudes from the groove and abuts on the groove bottom. The magnet block is rested on the base and clamped between the rubber rods. The volume of the groove is larger than the volume of the rubber rod.Type: GrantFiled: June 22, 2012Date of Patent: September 2, 2014Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yuhito Doi, Takayuki Hasegawa, Takaharu Yamaguchi, Takehisa Minowa
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Publication number: 20140208663Abstract: In an outer blade cutting wheel comprising an annular thin disc base of cemented carbide having an outer diameter of 80-200 mm, an inner diameter of 30-80 mm, and a thickness of 0.1-1.0 mm, and a blade section disposed on an outer periphery of the base, the blade section comprises diamond grains and/or CBN grains bound with a metal bond having a Young's modulus of 0.7-4.0×1011 Pa and has a thickness which is greater than the thickness of the base by at least 0.01 mm. The outer blade cutting wheel is capable of cutting a workpiece at a high accuracy and a reduced allowance, improves machining yields, and reduces machining costs.Type: ApplicationFiled: March 27, 2014Publication date: July 31, 2014Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masaki Kasashima, Takehisa Minowa, Takaharu Yamaguchi, Koji Sato
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Patent number: 8753174Abstract: In a method for multiple cutoff machining a rare earth magnet block, a cutting fluid feed nozzle having a plurality of slits is combined with a plurality of cutoff abrasive blades coaxially mounted on a rotating shaft, each said blade comprising a base disk and a peripheral cutting part. The slits in the feed nozzle into which the outer peripheral portions of cutoff abrasive blades are inserted serve to restrict any axial run-out of the cutoff abrasive blades during rotation. Cutting fluid is fed from the feed nozzle through slits to the rotating cutoff abrasive blades and eventually to points of cutoff machining on the magnet block.Type: GrantFiled: January 30, 2013Date of Patent: June 17, 2014Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Koji Sato, Takehisa Minowa, Takaharu Yamaguchi, Takayuki Hasegawa, Kazuhito Akada
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Patent number: 8733336Abstract: In an outer blade cutting wheel comprising an annular thin disc base of cemented carbide having an outer diameter of 80-200 mm, an inner diameter of 30-80 mm, and a thickness of 0.1-1.0 mm, and a blade section disposed on an outer periphery of the base, the blade section comprises diamond grains and/or CBN grains bound with a metal bond having a Young's modulus of 0.7-4.0×1011 Pa and has a thickness which is greater than the thickness of the base by at least 0.01 mm. The outer blade cutting wheel is capable of cutting a workpiece at a high accuracy and a reduced allowance, improves machining yields, and reduces machining costs.Type: GrantFiled: June 11, 2012Date of Patent: May 27, 2014Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaki Kasashima, Takehisa Minowa, Takaharu Yamaguchi, Koji Sato
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Patent number: 8702084Abstract: A magnet holding jig comprises a platform and first and second holders disposed on opposite sides of the platform. The platform is provided with channels, the holders are comb-shaped to define digits and slits, the channels and the slits being aligned to define guide paths for permitting entry of a cutting tool therein, and the holders are also configured as digitate hooks. The holder hooks are in contact with a rare earth magnet block resting on the platform. The holders are pushed inward at their lower portions so as to bring each hook digit of the second holder in pressure abutment with the magnet block at a higher level than each hook digit of the first holder for thereby holding the magnet block in place on the platform.Type: GrantFiled: January 5, 2011Date of Patent: April 22, 2014Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yuhito Doi, Takehisa Minowa, Takayuki Hasegawa, Takaharu Yamaguchi, Koji Sato
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Patent number: 8702083Abstract: A magnet holding jig comprises a platform and first and second holders disposed on opposite sides of the platform. The platform is provided with channels, the holders are comb-shaped to define digits and slits, the channels and the slits being aligned to define guide paths for permitting entry of a cutting tool therein, and the holders are also configured as digitate hooks. The holder hooks are in contact with a rare earth magnet block resting on the platform. The holders are pushed inward at their lower portions so as to elastically deform the digitate hook and move it backward and to bring the hook digits in pressure abutment with the magnet block, thereby holding the magnet block in place on the platform.Type: GrantFiled: January 5, 2011Date of Patent: April 22, 2014Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yuhito Doi, Takehisa Minowa, Takayuki Hasegawa, Takaharu Yamaguchi, Koji Sato
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Patent number: 8567383Abstract: In a method for multiple cutoff machining a rare earth magnet block, a cutting fluid feed nozzle having a plurality of slits is combined with a plurality of cutoff abrasive blades coaxially mounted on a rotating shaft, each said blade comprising a base disk and a peripheral cutting part. The slits in the feed nozzle into which the outer peripheral portions of cutoff abrasive blades are inserted serve to restrict any axial run-out of the cutoff abrasive blades during rotation. Cutting fluid is fed from the feed nozzle through slits to the rotating cutoff abrasive blades and eventually to points of cutoff machining on the magnet block.Type: GrantFiled: July 20, 2012Date of Patent: October 29, 2013Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Koji Sato, Takehisa Minowa, Takaharu Yamaguchi, Takayuki Hasegawa, Kazuhito Akada
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Patent number: 8568203Abstract: In a method for multiple cutoff machining a rare earth magnet block, a cutting fluid feed nozzle having a plurality of slits is combined with a plurality of cutoff abrasive blades coaxially mounted on a rotating shaft, each said blade comprising a base disk and a peripheral cutting part. The slits in the feed nozzle into which the outer peripheral portions of cutoff abrasive blades are inserted serve to restrict any axial run-out of the cutoff abrasive blades during rotation. Cutting fluid is fed from the feed nozzle through slits to the rotating cutoff abrasive blades and eventually to points of cutoff machining on the magnet block.Type: GrantFiled: October 30, 2009Date of Patent: October 29, 2013Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Koji Sato, Takehisa Minowa, Takaharu Yamaguchi, Takayuki Hasegawa, Kazuhito Akada
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Patent number: 8459246Abstract: In an outer blade cutting wheel comprising an annular thin disc base of cemented carbide having an outer diameter of 80-200 mm, an inner diameter of 30-80 mm, and a thickness of 0.1-1.0 mm, and a blade section disposed on an outer periphery of the base, the blade section comprises diamond grains and/or CBN grains bound with a metal bond having a Young's modulus of 0.7-4.0×1011 Pa and has a thickness which is greater than the thickness of the base by at least 0.01 mm. The outer blade cutting wheel is capable of cutting a workpiece at a high accuracy and a reduced allowance, improves machining yields, and reduces machining costs.Type: GrantFiled: December 23, 2008Date of Patent: June 11, 2013Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaki Kasashima, Takehisa Minowa, Takaharu Yamaguchi, Koji Sato
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Publication number: 20120326371Abstract: When a rare earth magnet block is cut or ground by a cutting or grinding tool, a jig is used for holding the magnet block in place. The jig comprises a base, a pair of metal support members disposed on opposite sides of the base and provided with grooves, and rubber rods received in the support member grooves such that the rubber rod partially protrudes from the groove and abuts on the groove bottom. The magnet block is rested on the base and clamped between the rubber rods. The volume of the groove is larger than the volume of the rubber rod.Type: ApplicationFiled: June 22, 2012Publication date: December 27, 2012Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yuhito Doi, Takayuki Hasegawa, Takaharu Yamaguchi, Takehisa Minowa
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Publication number: 20120282848Abstract: In a method for multiple cutoff machining a rare earth magnet block, a cutting fluid feed nozzle having a plurality of slits is combined with a plurality of cutoff abrasive blades coaxially mounted on a rotating shaft, each said blade comprising a base disk and a peripheral cutting part. The slits in the feed nozzle into which the outer peripheral portions of cutoff abrasive blades are inserted serve to restrict any axial run-out of the cutoff abrasive blades during rotation. Cutting fluid is fed from the feed nozzle through slits to the rotating cutoff abrasive blades and eventually to points of cutoff machining on the magnet block.Type: ApplicationFiled: July 20, 2012Publication date: November 8, 2012Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Koji Sato, Takehisa Minowa, Takaharu Yamaguchi, Takayuki Hasegawa, Kazuhito Akada
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Publication number: 20120282847Abstract: In a method for multiple cutoff machining a rare earth magnet block, a cutting fluid feed nozzle having a plurality of slits is combined with a plurality of cutoff abrasive blades coaxially mounted on a rotating shaft, each said blade comprising a base disk and a peripheral cutting part. The slits in the feed nozzle into which the outer peripheral portions of cutoff abrasive blades are inserted serve to restrict any axial run-out of the cutoff abrasive blades during rotation. Cutting fluid is fed from the feed nozzle through slits to the rotating cutoff abrasive blades and eventually to points of cutoff machining on the magnet block.Type: ApplicationFiled: July 20, 2012Publication date: November 8, 2012Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Koji Sato, Takehisa Minowa, Takaharu Yamaguchi, Takayuki Hasegawa, Kazuhito Akada
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Publication number: 20120252330Abstract: In an outer blade cutting wheel comprising an annular thin disc base of cemented carbide having an outer diameter of 80-200 mm, an inner diameter of 30-80 mm, and a thickness of 0.1-1.0 mm, and a blade section disposed on an outer periphery of the base, the blade section comprises diamond grains and/or CBN grains bound with a metal bond having a Young's modulus of 0.7-4.0×1011 Pa and has a thickness which is greater than the thickness of the base by at least 0.01 mm. The outer blade cutting wheel is capable of cutting a workpiece at a high accuracy and a reduced allowance, improves machining yields, and reduces machining costs.Type: ApplicationFiled: June 11, 2012Publication date: October 4, 2012Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masaki KASASHIMA, Takehisa MINOWA, Takaharu YAMAGUCHI, Koji SATO
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Publication number: 20110162504Abstract: A magnet holding jig comprises a platform and first and second holders disposed on opposite sides of the platform. The platform is provided with channels, the holders are comb-shaped to define digits and slits, the channels and the slits being aligned to define guide paths for permitting entry of a cutting tool therein, and the holders are also configured as digitate hooks. The holder hooks are in contact with a rare earth magnet block resting on the platform. The holders are pushed inward at their lower portions so as to elastically deform the digitate hook and move it backward and to bring the hook digits in pressure abutment with the magnet block, thereby holding the magnet block in place on the platform.Type: ApplicationFiled: January 5, 2011Publication date: July 7, 2011Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yuhito Doi, Takehisa Minowa, Takayuki Hasegawa, Takaharu Yamaguchi, Koji Sato
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Publication number: 20110165822Abstract: A magnet holding jig comprises a platform and first and second holders disposed on opposite sides of the platform. The platform is provided with channels, the holders are comb-shaped to define digits and slits, the channels and the slits being aligned to define guide paths for permitting entry of a cutting tool therein, and the holders are also configured as digitate hooks. The holder hooks are in contact with a rare earth magnet block resting on the platform. The holders are pushed inward at their lower portions so as to bring each hook digit of the second holder in pressure abutment with the magnet block at a higher level than each hook digit of the first holder for thereby holding the magnet block in place on the platform.Type: ApplicationFiled: January 5, 2011Publication date: July 7, 2011Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Yuhito Doi, Takehisa Minowa, Takayuki Hasegawa, Takaharu Yamaguchi, Koji Sato
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Publication number: 20100112904Abstract: In a method for multiple cutoff machining a rare earth magnet block, a cutting fluid feed nozzle having a plurality of slits is combined with a plurality of cutoff abrasive blades coaxially mounted on a rotating shaft, each said blade comprising a base disk and a peripheral cutting part. The slits in the feed nozzle into which the outer peripheral portions of cutoff abrasive blades are inserted serve to restrict any axial run-out of the cutoff abrasive blades during rotation. Cutting fluid is fed from the feed nozzle through slits to the rotating cutoff abrasive blades and eventually to points of cutoff machining on the magnet block.Type: ApplicationFiled: October 30, 2009Publication date: May 6, 2010Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Koji Sato, Takehisa Minowa, Takaharu Yamaguchi, Takayuki Hasegawa, Kazuhito Akada
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Publication number: 20090165768Abstract: In an outer blade cutting wheel comprising an annular thin disc base of cemented carbide having an outer diameter of 80-200 mm, an inner diameter of 30-80 mm, and a thickness of 0.1-1.0 mm, and a blade section disposed on an outer periphery of the base, the blade section comprises diamond grains and/or CBN grains bound with a metal bond having a Young's modulus of 0.7-4.0×1011 Pa and has a thickness which is greater than the thickness of the base by at least 0.01 mm. The outer blade cutting wheel is capable of cutting a workpiece at a high accuracy and a reduced allowance, improves machining yields, and reduces machining costs.Type: ApplicationFiled: December 23, 2008Publication date: July 2, 2009Applicant: SHIN-ETSU CHEMICAL CO., LTD.Inventors: Masaki Kasashima, Takehisa Minowa, Takaharu Yamaguchi, Koji Sato
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Patent number: 4893982Abstract: An apparatus for conveying a workpiece comprising workpiece clamping means for clamping, releasing and rotating the workpiece, clamp reversing means operable from outside for moving the workpiece clamping means between a clamping position and a releasing position, workpiece holders which reciprocally move between a workpiece receiving position and a workpiece discharging position, and external actuating means at the workpiece receiving position and the workpiece discharging position, for actuating the clamp reversing means.Type: GrantFiled: December 28, 1987Date of Patent: January 16, 1990Assignee: Taiho Seiki Co., Ltd.Inventor: Takaharu Yamaguchi