Patents by Inventor Takuya Matsumoto
Takuya Matsumoto 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: 11866797Abstract: This non-oriented electrical steel sheet includes a base metal having a predetermined chemical composition satisfying the expression [Si+0.5×Mn?4.3], and an average grain size of the base metal is more than 40 ?m and 120 ?m or less.Type: GrantFiled: November 1, 2019Date of Patent: January 9, 2024Assignee: NIPPON STEEL CORPORATIONInventors: Hiroyoshi Yashiki, Yoshiaki Natori, Miho Tomita, Kazutoshi Takeda, Takuya Matsumoto
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Patent number: 11854584Abstract: The present disclosure relates to heat-assisted magnetic recording (HAMR) write heads including a waveguide and a main pole having a main pole tip. One or more current paths are provided through the main pole tip. Terminals of the one or more current paths can be coupled to the main pole, a trailing shield, a leading shield, a heat sink layer, a touch pad, a pole diffusion barrier layer, a NTS sensor, or another suitable component of the HAMR write head.Type: GrantFiled: July 29, 2022Date of Patent: December 26, 2023Assignee: Western Digital Technologies, Inc.Inventors: Muhammad Asif Bashir, Alexander Goncharov, Takuya Matsumoto, Petrus Antonius Van Der Heijden
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Publication number: 20230369706Abstract: Provided is a battery housing device that can satisfactorily protect a battery terminal and housing section terminal. A housing section of a battery housing device has an opening through which a battery can be inserted and removed, and a housing space in which the battery can be removably housed via the opening. The relative position of the housing section terminal with respect to the housing section is fixed, and the housing section terminal can be brought into contact with and connected to a battery terminal. A portable part can support the battery and is movable in relation to the housing section between a connected position at which the housing section terminal and the battery terminal are connected and a non-connected position at which the housing section terminal and the battery terminal are not connected. A regulating part releasably regulates movement of the portable part from the non-connected position to the connected position.Type: ApplicationFiled: September 17, 2020Publication date: November 16, 2023Inventors: Fumika Sueyoshi, Takuya Matsumoto
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Patent number: 11817677Abstract: Embodiments of the present disclosure generally relate to a vertical cavity surface emitting laser (VCSEL), a head gimbal assembly for mounting a VCSEL, devices incorporating such articles, and to a process for forming a VCSEL. In an embodiment, a VCSEL device provided. The VCSEL device includes a chip for mounting on a slider, the chip having a plurality of surfaces and a notch, the plurality of surfaces comprising: a bottom surface for facing the slider; a top surface opposite the bottom surface; and a plurality of side surfaces, wherein the notch forms a recessed edge spaced away from the bottom surface and toward the top surface, the notch having a shoulder, a side, and an angle (?1) between the shoulder and the side. The VCSEL device further includes two laser diode electrodes positioned in any combination on one or more of the plurality of surfaces of the chip.Type: GrantFiled: June 13, 2022Date of Patent: November 14, 2023Assignee: Western Digital Technologies, Inc.Inventors: Takuya Matsumoto, Barry C. Stipe
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Publication number: 20230344056Abstract: Provided is a battery storage apparatus having improved switching operability between the locked state and the unlocked state of a lock. In the battery storage apparatus, a battery can be detachably stored in a storage space of a storage part, and the battery can be fixedly held in a holding position/location of the storage space. A portable part can support the battery and can move between the holding position and an insertion/extraction position within the storage space. In the portable part the battery is inserted and extracted at the insertion/extraction position. The lock enters a locked state that fixedly holds the battery to the storage part when the portable part is in the holding position, and enters an unlocked state that releases the fixed holding of the battery to the storage part when the portable part is in the insertion/extraction position.Type: ApplicationFiled: September 17, 2020Publication date: October 26, 2023Inventors: Takuya Matsumoto, Fumika Sueyoshi
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Patent number: 11782270Abstract: A head-up display includes a display device and an optical system. The display device includes a display panel, an input unit, a memory, and a controller. The display panel is configured to display an image. The input unit is configured to receive calibration information indicating a position of a calibration object and first position information indicating positions of user's eyes based on an image capturing device. The memory is configured to store the calibration information. The optical system is configured to allow a user to visually recognize a virtual image plane, which is a virtual image of the image displayed on the display panel, by reflecting image light emitted corresponding to the image toward the user's eyes. The controller is configured to convert the first position information into second position information indicating the positions of the eyes based on the virtual image plane by using the calibration information.Type: GrantFiled: August 26, 2019Date of Patent: October 10, 2023Assignee: KYOCERA CorporationInventors: Takuya Matsumoto, Hideyuki Inoue
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Patent number: 11785026Abstract: An information processing device 10 comprises a data reception unit 13 that accepts transmission information of an email received by each of a plurality of mail servers 12, the transmission information being extracted from the emails; a transmission information determination unit 14 that determines whether the transmission source of the email is appropriate based on the transmission information; and a whitelist distribution unit 16 that distributes the transmission source determined to be appropriate to each of the plurality of mail servers.Type: GrantFiled: August 14, 2019Date of Patent: October 10, 2023Assignee: DIGITAL ARTS INC.Inventors: Toshio Dogu, Takuya Matsumoto, Mitsunari Satoh
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Publication number: 20230287611Abstract: The present disclosure provides: a biodegradable nonwoven fabric for thermoforming, the biodegradable nonwoven fabric being composed of a fiber of a polylactic acid-based polymer, and having a basis weight of 20-300 g/m2, preferably, a biodegradable nonwoven fabric characterized by being composed of a long fiber of a polylactic acid polymer, having an MD-direction elongation of 50% or more at 120° C., and having an MD-direction dimensional change rate of ±4% or less at 80-140° C. as determined by thermomechanical analysis; a method for producing a molded body by using said biodegradable nonwoven fabric; and a method for molding a biodegradable beverage extraction container, the method being characterized in that the molded body has an MD-direction elongation change rate of 4% or less, as determined by thermomechanical analysis (TMA) under a load of 0.05 N/2 mm at 30-100° C.Type: ApplicationFiled: May 18, 2023Publication date: September 14, 2023Applicant: Asahi Kasei Kabushiki KaishaInventors: Yusuke Yamada, Chie Okamura, Takuya Matsumoto, Rumina Obi, Kazufumi Kato
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Publication number: 20230245681Abstract: A heat-assisted magnetic recording (HAMR) head has a slider with a gas-bearing-surface (GBS). The slider supports a near-field transducer (NFT) and a main magnetic pole that has a step or recess in the NFT-facing surface near the GBS that contains plasmonic material. A thermal shunt is located between the NFT and the main pole to allow heat to be transferred away from the optical spot generated by the NFT. The NFT-facing surface of the main pole that is recessed from the step away from the GBS is in contact with the thermal shunt, and the thermal shunt is in contact with the plasmonic material in the step in the back region recessed from the GBS, so there is no increase in the spacing between the NFT and a large portion of the main pole.Type: ApplicationFiled: December 14, 2022Publication date: August 3, 2023Applicant: Western Digital Technologies, Inc.Inventors: Takuya MATSUMOTO, Barry Cushing STIPE, Muhammad ASIF BASHIR
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Patent number: 11715986Abstract: A motor includes a rotor and a stator including a stator core and a winding including a first extension extending with respect to the stator core toward one side in a rotation-axis direction of the rotor, a second extension extending toward a rotation-radial direction outside of the rotor from an end of the first extension on the one side in the rotation-axis direction, and a third extension extending toward the one side in the rotation-axis direction from an end at the rotor rotation-radial direction outside of the second extension, and connected to a circuit device, and the winding forming a coil around the stator core, and such that an inner bent portion at a boundary between the first and second extensions is disposed at the one side in the rotation-axis direction with respect to an outer bent portion at a boundary between the second and third extensions.Type: GrantFiled: June 29, 2021Date of Patent: August 1, 2023Assignee: DENSO CORPORATIONInventors: Shinji Ikeda, Takumi Nagaya, Tatsuya Takagi, Kuniaki Matsumoto, Kazuhiro Hosotani, Yutaro Yagi, Yoshihiko Suga, Takuya Matsumoto, Shunichi Hiraoka
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Patent number: 11697896Abstract: The present disclosure provides: a biodegradable nonwoven fabric for thermoforming, the biodegradable nonwoven fabric being composed of a fiber of a polylactic acid-based polymer, and having a basis weight of 20-300 g/m2, preferably, a biodegradable nonwoven fabric characterized by being composed of a long fiber of a polylactic acid polymer, having an MD-direction elongation of 50% or more at 120° C., and having an MD-direction dimensional change rate of ±4% or less at 80-140° C. as determined by thermomechanical analysis; a method for producing a molded body by using said biodegradable nonwoven fabric; and a method for molding a biodegradable beverage extraction container, the method being characterized in that the molded body has an MD-direction elongation change rate of 4% or less, as determined by thermomechanical analysis (TMA) under a load of 0.05 N/2 mm at 30-100° C.Type: GrantFiled: October 12, 2017Date of Patent: July 11, 2023Assignee: Asahi Kasei Kabushiki KaishaInventors: Yusuke Yamada, Chie Okamura, Takuya Matsumoto, Rumina Obi, Kazufumi Kato
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Publication number: 20230212705Abstract: Provided is a stainless steel sheet having a predetermined chemical composition, in which a total volume fraction of Cr-based carbides with a grain size of 2.0 ?m or more is 10% or less.Type: ApplicationFiled: April 7, 2021Publication date: July 6, 2023Applicant: JFE STEEL CORPORATIONInventors: Masataka YOSHINO, Shino HIROTA, Takuya MATSUMOTO, Ayako TA
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Patent number: 11670331Abstract: According to one embodiment, a magnetic disk device includes a rotatable disk-shaped recording medium, a magnetic head including a write head having a main magnetic pole that applies a recording magnetic field to the recording medium, an assist element that assists magnetic recording by the main magnetic pole, and a plurality of thermal actuators that control a head gradient with respect to the recording medium, and a controller which includes a detection unit configured to detect deterioration of the magnetic head, and changes a head gradient of the magnetic head by the thermal actuator according to the detected deterioration.Type: GrantFiled: February 15, 2022Date of Patent: June 6, 2023Assignees: Kabushiki Kaisha Toshiba, Toshiba Electronic Devices & Storage CorporationInventors: Kaori Kimura, Akihiko Takeo, Takuya Matsumoto
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Publication number: 20230166562Abstract: A pneumatic radial tire for aircraft in the present disclosure includes a bead core formed by a pair of cable beads embedded in a respective pair of bead portions, a pair of bead fillers respectively arranged outward in a tire radial direction from the pair of bead cores, and a carcass formed by two or more carcass plies that extend toroidally between the pair of bead cores. In a tire widthwise cross-sectional view, an end of a carcass ply, among the two or more carcass plies, closest to the bead filler in a region inward in a tire width direction from the bead filler is located in a region corresponding to 45° to 90° inward in the tire width direction when 0° is defined as outward in the tire radial direction from a center of the bead core.Type: ApplicationFiled: December 17, 2020Publication date: June 1, 2023Applicant: BRIDGESTONE CORPORATIONInventors: Gaku OGAWA, Takuya MATSUMOTO
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Patent number: 11657845Abstract: The present disclosure generally relates to a magnetic recording head for a magnetic media drive. The magnetic recording head comprises a near field transducer (NFT), a vertical cavity surface emitting laser (VCSEL) device, and a waveguide structure coupled between the NFT and the VCSEL device. The waveguide structure comprises a plurality of waveguide channels and a multimodal interference (MMI) combiner coupled to the waveguide channels. One or more of a curvature, a path length, and a propagation length of each of the waveguide channels is optimized such that each waveguide channel is controllable, or otherwise phase coherent with adjacent waveguide channels. The VCSEL device is capable of emitting a plurality of lasers through the plurality of waveguide channels, and the plurality of lasers are phase coherent when input into the MMI combiner. The MMI combiner combines a power of the plurality of lasers, which is output to the NFT.Type: GrantFiled: March 30, 2022Date of Patent: May 23, 2023Assignee: Western Digital Technologies, Inc.Inventors: Norman N. Shi, Takuya Matsumoto, Barry C. Stipe
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Patent number: 11651791Abstract: A heat-assisted magnetic recording (HAMR) head for recording data in data tracks of a HAMR disk has a gas-bearing slider that supports a near-field transducer (NFT) and a main magnetic pole formed of two layers. The first main pole layer has a cross-track width at the slider's gas-bearing surface (GBS) that tapers down in the direction towards the NFT where the optical spot is formed. The second main pole layer is located away from the NFT and has a substantially wider cross-track width than the first main pole layer so as to provide sufficient magnetic field for writing. Layers of heat sink material are located on the sloped cross-track sides of the tapered first main pole layer to reduce the temperature and thus the likelihood of oxidation of the main pole layers.Type: GrantFiled: July 21, 2022Date of Patent: May 16, 2023Assignee: Western Digital Technologies, Inc.Inventors: Takuya Matsumoto, Muhammad Asif Bashir, Hamid Balamane, Petrus Antonius Van Der Heijden, Barry C. Stipe
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Patent number: 11651786Abstract: The present disclosure relates to pretreating a magnetic recording head for magnetic media drive. For a heat assisted magnetic recording (HAMR) head, a light source provides the necessary heat for the drive to operation. A vertical cavity surface emitting laser (VCSEL) is mounted to a top surface of a slider. A plurality of laser beams are emitted from the bottom surface of the VCSEL and directed to a corresponding number of waveguide structures within the HAMR head. The waveguide structures feed into a multimode interference (MMI) device that then directs the laser into a single waveguide for focusing on a near field transducer (NFT). The VCSEL lasers are phase coherent and have no mode hopping.Type: GrantFiled: March 1, 2022Date of Patent: May 16, 2023Assignee: Western Digital Technologies, Inc.Inventors: Barry C. Stipe, Takuya Matsumoto, Sergei Sochava
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Patent number: 11651787Abstract: The present disclosure relates to pretreating a magnetic recording head for magnetic media drive. For a heat assisted magnetic recording (HAMR) head, a light source provides the necessary heat for the drive to operation. A vertical cavity surface emitting laser (VCSEL) is mounted to a top surface of a slider. A plurality of laser beams are emitted from the bottom surface of the VCSEL and directed to a corresponding number of waveguide structures within the HAMR head. The waveguide structures feed into a multimode interference (MMI) device that then directs the laser into a single waveguide for focusing on a near field transducer (NFT). The VCSEL lasers are phase coherent and have no mode hopping.Type: GrantFiled: March 1, 2022Date of Patent: May 16, 2023Assignee: Western Digital Technologies, Inc.Inventors: Barry C. Stipe, Takuya Matsumoto, Sergei Sochava
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Publication number: 20230137498Abstract: A non-oriented electrical steel sheet including a base metal that has a chemical composition including, in mass %, C: 0.0010 to 0.0040%, Si: 3.5 to 4.9%, Mn: 0.05 to 0.20%, Al: 0.05 to 0.45%, P: 0.030% or less, S: 0.0030% or less, N: 0.0030% or less, O: 0.0100 to 0.0400%, Ca: less than 0.0010%, Ti: less than 0.0050%, Nb: less than 0.0050%, Zr: less than 0.0050%, V: less than 0.0050%, Cu: less than 0.20%, Ni: less than 0.50%, Sn: 0 to 0.05%, Sb: 0 to 0.05%, and a balance: Fe and impurities, and satisfying [4.0?Si+Al?5.0], in which the base metal has an O content of less than 0.0050% in a region excluding a portion from a surface of the base metal to a position of 10 ?m in a depth direction of the base metal.Type: ApplicationFiled: April 16, 2021Publication date: May 4, 2023Inventors: Hiroyoshi YASHIKI, Yoshiaki NATORI, Miho TOMITA, Kazutoshi TAKEDA, Takuya MATSUMOTO
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Publication number: 20230139246Abstract: A non-oriented electrical steel sheet including a base metal that has a chemical composition including, in mass%, C: 0.0010 to 0.0040%, Si: 4.0 to 5.0%, Mn: 0.20% or less Al: 0.010% or more and less than 0.050%, P: 0.030% or less, S: 0.0030% or less, N: 0.0005 to 0.0030%, O: 0.0100 to 0.0400%, Ca: less than 0.0010%, Ti: less than 0.0050%, Nb: less than 0.0050%, Zr: less than 0.0050%, V: less than 0.0050%, Cu: less than 0.20%, Ni: less than 0.50%, Sn: 0 to 0.05%, Sb: 0 to 0.05%, and a balance: Fe and impurities, in which the base metal has an O content of less than 0.0050% in a region excluding a portion from a surface of the base metal to a position of 10 µm in a depth direction of the base metal.Type: ApplicationFiled: April 16, 2021Publication date: May 4, 2023Inventors: Hiroyoshi YASHIKI, Yoshiaki NATORI, Miho TOMITA, Kazutoshi TAKEDA, Takuya MATSUMOTO