Patents by Inventor Takashi Shigematsu

Takashi Shigematsu 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).

  • Publication number: 20210178514
    Abstract: A welding method includes: emitting laser beam toward a workpiece including a metal to melt and weld a part of the workpiece, the part being where the laser beam has been emitted to. Further, the laser beam includes a main power region and at least one auxiliary power region, a power of the main power region is larger than a power of each of the at least one auxiliary power region, and a ratio between the power of the main power region and the total of powers of the at least one auxiliary power region is in a range of 144:1 to 1:9.
    Type: Application
    Filed: February 24, 2021
    Publication date: June 17, 2021
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Tomomichi YASUOKA, Takashi KAYAHARA, Ryosuke NISHII, Koji KIRIKAE, Keigo MATSUNAGA, Takashi SHIGEMATSU
  • Publication number: 20210170527
    Abstract: A welding method includes a step of, while irradiating laser beam toward a workpiece, relatively moving the laser beam and the workpiece and, while sweeping the laser beam on the workpiece, melting the workpiece in an irradiated portion to perform welding. Further, the laser beam is configured by a main power region and a sub-power region, at least a part of the sub-power region is present on a sweeping direction side of the main power region, a power density of the main power region is equal to or higher than a power density of the sub-power region, and the power density of the main power region is at least power density that can generate a keyhole.
    Type: Application
    Filed: February 19, 2021
    Publication date: June 10, 2021
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Tomomichi YASUOKA, Takashi KAYAHARA, Toshiaki SAKAI, Ryosuke NISHII, Takashi SHIGEMATSU
  • Publication number: 20210162539
    Abstract: A welding method includes: layering two or more plate materials each including a plating plate material having a preform on a surface of which a plating layer is formed to form a workpiece; disposing the workpiece in a region to be irradiated with a processing laser beam; generating the processing laser beam having a power distribution shape in which two or more power regions are disposed along a predetermined direction in a plane perpendicular to a light traveling direction; irradiating a surface of the workpiece with the processing laser beam; and moving the processing laser beam and the workpiece relatively while performing the irradiation, and melting an irradiated area of the workpiece to perform welding while sweeping the processing laser beam in the predetermined direction on the workpiece during a swing of the processing laser beam.
    Type: Application
    Filed: February 17, 2021
    Publication date: June 3, 2021
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Takashi KAYAHARA, Ryosuke NISHII, Satoshi ASANUMA, Tomomichi YASUOKA, Takashi SHIGEMATSU
  • Publication number: 20210086295
    Abstract: A welding method includes: disposing a workpiece formed by stacking a plurality of metal foils in an area to be irradiated with laser light that contains a plurality of beams; irradiating a surface of the workpiece with the beams of the laser light by dispersing positions of the beams such that centers of the beams do not overlap with each other within a prescribed area on the surface; melting an irradiated part of the workpiece and performing welding; and setting each of the beams to have a power density with which no hole opens in the metal foils, and setting the power density of the beams and dispersing irradiating positions to be emitted so as to form a weld pool penetrating the workpiece by the beams.
    Type: Application
    Filed: December 8, 2020
    Publication date: March 25, 2021
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Ryosuke NISHII, Kousuke KASHIWAGI, Takashi KAYAHARA, Tomomichi YASUOKA, Takashi SHIGEMATSU
  • Publication number: 20210031301
    Abstract: A welding method includes: arranging a workpiece containing copper in a region to be irradiated with laser light; and irradiating the workpiece with the laser light to melt and weld an irradiated portion of the workpiece. Further, the laser light is formed of a main beam and a plurality of sub beams, and a ratio of power of the main beam to total power of the plurality of sub beams is 72:1 to 3:7.
    Type: Application
    Filed: October 9, 2020
    Publication date: February 4, 2021
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Tomomichi YASUOKA, Takashi KAYAHARA, Toshiaki SAKAI, Ryosuke NISHII, Takashi SHIGEMATSU
  • Publication number: 20200384574
    Abstract: A welding method includes: forming a workpiece by stacking plated sheet members having a plating layer formed on a surface of a base material; disposing the workpiece in an area to be irradiated with laser light; irradiating a surface of the workpiece with a plurality of beams by dispersing positions such that centers of the beams do not overlap with each other within a prescribed area on the surface; while continuing the irradiation, relatively moving the beams and the workpiece and sweeping the beams on the workpiece so as to melt an irradiated part of the workpiece for performing welding; and setting a distance between the beams to be emitted such that weld pools formed in the workpiece by irradiation of each of the beams overlap with each other.
    Type: Application
    Filed: August 26, 2020
    Publication date: December 10, 2020
    Applicant: FURUKAWA ELECTRONIC CO, LTD.
    Inventors: Ryosuke NISHII, Takashi KAYAHARA, Toshiaki SAKAI, Tomomichi YASUOKA, Takashi SHIGEMATSU
  • Publication number: 20200280238
    Abstract: An electric motor and inverter assembly (100) used in an electric vehicle or a hybrid electric vehicle to drive the vehicle's wheels to rotate is disclosed. The electric motor and inverter assembly comprises: an electric motor (300), which includes a housing including a main shell (310), an end cover (320) and a connecting cover (330), wherein a cooling passage is formed in a wall of the housing such that coolant is able to flow in the cooling passage, and an end cover (320) and a connecting cover (330) are respectively connected to opposite ends of the main shell; and an inverter, which includes a housing (210) in which a power element and/or an electrical device is received, wherein the housing of the inverter contacts the connecting cover such that an interface is defined between the connecting cover and the housing of the inverter, and the coolant flowing through the cooling passage is able to contact the interface.
    Type: Application
    Filed: September 18, 2017
    Publication date: September 3, 2020
    Inventors: Tao Zhu, Yanlin Li, Xinhua Liu, Takashi Shigematsu, Heinz-Bernd Haiser, Peter Ropertz, Ralf Schmid, Shi Deng
  • Publication number: 20200280246
    Abstract: An electric drive system (100) used in an electric vehicle or a hybrid electric vehicle to drive the vehicle's wheels to rotate, the electric drive system (100) comprising: an electric motor (300), said electric motor (300) including a housing in which a stator and a rotor are received; a transmission device (400) operatively coupled to the electric motor (300); and an output shaft (500) operatively coupled to the transmission device (400), wherein the output shaft (500) extends from the transmission device (400) and is substantially parallel to the rotor's axis of the electric motor (300), and wherein the electric drive system (100) also comprises an inverter (200), the inverter is secured over the housing of the electric motor (300) such that the inverter is located between the output shaft (500) and the housing of the electric motor (300), such that the system is compact in configuration and is high-integrated.
    Type: Application
    Filed: September 18, 2017
    Publication date: September 3, 2020
    Inventors: Shi Deng, Tao Zhu, Peter Ropertz, Heinz-Bernd Haiser, Takashi Shigematsu, Yanlin Li
  • Publication number: 20190389001
    Abstract: A method of welding a workpiece by using a laser is provided which includes disposing a workpiece in a region to be irradiated with laser light from a laser oscillator; and irradiating the workpiece with the laser light from the laser oscillator such that an irradiated portion of the workpiece is melted and welded while sweeping the laser light over the workpiece by relatively moving the laser light and the workpiece. The laser light is formed of a main beam and an auxiliary beam, at least part of the auxiliary beam being disposed anteriorly in a sweep direction, and the main beam has a power density equal to or greater than a power density of the auxiliary beam.
    Type: Application
    Filed: September 3, 2019
    Publication date: December 26, 2019
    Applicant: FURUKAWA ELECTRIC CO., LTD.
    Inventors: Tomomichi YASUOKA, Takashi KAYAHARA, Toshiaki SAKAI, Ryosuke NISHII, Takashi SHIGEMATSU
  • Patent number: 10122095
    Abstract: A crimp terminal includes a crimp portion formed in a tubular shape with an electrically conductive the substrate and configured to crimp join with an electric wire, and a sealing portion formed at one end of the crimp portion and seals against an electric wire to be crimp joined to the crimp portion. At the sealing portion, the substrate is bent and lapped and continuously joined from one end portion to another end portion of this overlapped portion. One end of a joining trajectory is at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.
    Type: Grant
    Filed: February 15, 2017
    Date of Patent: November 6, 2018
    Assignees: FURUKAWA ELECTRIC CO., LTD., FURUKAWA AUTOMOTIVE SYSTEMS INC.
    Inventors: Shinya Kojima, Saburo Yagi, Takashi Shigematsu
  • Patent number: 9985405
    Abstract: A terminal manufacturing apparatus includes a pressing device adapted to form a chained terminal including a crimp portion by bending a continuously supplied plate-shaped workpiece into a hollow shape, the crimp portion being crimpable with a conductor part of a coated conductor accommodated therein, a welding device adapted to bring two edge portions of the crimp portion in proximity to each other and join the two edge portions by welding, a conveying/positioning time calculating unit adapted to determine a conveying/positioning time of the welding device on the basis of a machining time required by the pressing device and the welding device, and a conveying/positioning mechanism adapted to position the chained terminal in a welding machining position within the welding device in accordance with the conveying/positioning time.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: May 29, 2018
    Assignees: FURUKAWA AUTOMOTIVE SYSTEMS INC., FURUKAWA ELECTRIC CO., LTD.
    Inventors: Shinya Kojima, Masaya Satou, Takashi Shigematsu, Saburo Yagi, Kentarou Sakamoto, Mikio Kuwahara
  • Publication number: 20170301974
    Abstract: The present invention is aimed at providing a waveguide coupling that enables two waveguides to be easily connected together while aligning cross sections of the two waveguides to hold central axes of the two waveguides concentrically with high accuracy. A coupling is for use in connecting two waveguides in an axial direction. The coupling includes a continuous body and a ring member. The continuous body is used to surround in a circumferential direction a connecting portion connecting the two waveguides. The continuous body includes seven partitioning bodies hinged at six portions by gudgeons to become continuous, and the partitioning bodies of end portions are connected together with screws, whereby the continuous body is formed annularly. The ring member has an annular shape, is disposed along a circumference of the waveguide, and is connected to the continuous body by screws.
    Type: Application
    Filed: May 24, 2013
    Publication date: October 19, 2017
    Inventors: Tetsuji SAITO, Yasumasa TANAKA, Masatsugu SAKAGUCHI, Takashi SHIGEMATSU
  • Patent number: 9694443
    Abstract: A laser welding apparatus that welds a butted interface of a workpiece by laser light irradiation while successively feeding the workpiece having the butted interface to a welding position includes an X- and Y-axis scanner that scans laser light outputted from a laser light source in an X-axis direction and a Y-axis direction which are orthogonal to each other, a measuring device that measures a dimension along the butted interface, and a scanner control device that controls driving of the X- and Y-axis scanner so as to weld the butted interface by laser light irradiation.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: July 4, 2017
    Assignee: Furukawa Automotive Systems Inc.
    Inventors: Saburo Yagi, Takashi Shigematsu, Masaya Satou, Shinya Kojima
  • Publication number: 20170162953
    Abstract: A crimp terminal includes a crimp portion formed in a tubular shape with an electrically conductive the substrate and configured to crimp join with an electric wire, and a sealing portion formed at one end of the crimp portion and seals against an electric wire to be crimp joined to the crimp portion. At the sealing portion, the substrate is bent and lapped and continuously joined from one end portion to another end portion of this overlapped portion. One end of a joining trajectory is at a position that is deviated on a side opposite of the crimp portion with respect to the sealing portion.
    Type: Application
    Filed: February 15, 2017
    Publication date: June 8, 2017
    Applicants: FURUKAWA ELECTRIC CO., LTD., FURUKAWA AUTOMOTIVE SYSTEMS INC.
    Inventors: Shinya KOJIMA, Saburo YAGI, Takashi SHIGEMATSU
  • Patent number: 9564691
    Abstract: A method for manufacturing a crimp terminal having a crimp portion that allows crimp connection to a conductor part of a coated wire includes forming a tubular body by bringing together side edges of a plate material made of metal composed of a copper alloy having a copper content ratio of greater than or equal to 70%, irradiating a periphery of the sides edges, which are brought together, with laser light from a laser irradiation unit to weld the side edges which are brought together, and setting a power density of the laser light and a sweep rate of the laser light in such a manner that a weld bead formed at the side edge portion after the welding has a width of 80 ?m to 390 ?m.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: February 7, 2017
    Assignees: FURUKAWA AUTOMOTIVE SYSTEMS INC., FURUKAWA ELECTRIC CO., LTD.
    Inventors: Saburo Yagi, Takashi Shigematsu, Masaya Satou, Shinya Kojima, Akira Tachibana
  • Patent number: 9391376
    Abstract: In a female crimp terminal including a pressure-bonding section for permitting pressure-bonding and connection to an aluminum core wire of an insulated wire, the pressure-bonding section is configured in a hollow sectional shape by a plate material, and a long length direction weld portion in a long length direction is welded, a forward part in the hollow sectional shape is caused to take an almost flat plate-shaped sealing shape and a width direction weld portion in a width direction is welded.
    Type: Grant
    Filed: January 5, 2015
    Date of Patent: July 12, 2016
    Assignees: Furukawa Electric Co., Ltd., Furukawa Automotive Systems, Inc.
    Inventors: Yukihiro Kawamura, Satoshi Takamura, Takashi Tonoike, Yasushi Kihara, Saburo Yagi, Takashi Shigematsu, Kengo Mitose, Takashi Kayahara
  • Patent number: 9275863
    Abstract: In a method of fabricating a semiconductor device having a MISFET of trench gate structure, a trench is formed from a major surface of a semiconductor layer of first conductivity type which serves as a drain region, in a depth direction of the direction of the semiconductor layer, a gate insulating film including a thermal oxide film and a deposited film is formed over the internal surface of the trench, and after a gate electrode has been formed in the trench, impurities are introduced into the semiconductor substrate of first conductivity type to form a semiconductor region of second conductivity type which serves as a channel forming region, and impurities are introduced into the semiconductor region of second conductivity type to form the semiconductor region of first conductivity type which serves as a source region.
    Type: Grant
    Filed: September 22, 2014
    Date of Patent: March 1, 2016
    Assignee: RENESAS ELECTRONICS CORPORATION
    Inventors: Sumito Numazawa, Yoshito Nakazawa, Masayoshi Kobayashi, Satoshi Kudo, Yasuo Imai, Sakae Kubo, Takashi Shigematsu, Akihiro Ohnishi, Kozo Uesawa, Kentaro Oishi
  • Publication number: 20150364891
    Abstract: A terminal manufacturing apparatus includes a pressing device adapted to form a chained terminal including a crimp portion by bending a continuously supplied plate-shaped workpiece into a hollow shape, the crimp portion being crimpable with a conductor part of a coated conductor accommodated therein, a welding device adapted to bring two edge portions of the crimp portion in proximity to each other and join the two edge portions by welding, a conveying/positioning time calculating unit adapted to determine a conveying/positioning time of the welding device on the basis of a machining time required by the pressing device and the welding device, and a conveying/positioning mechanism adapted to position the chained terminal in a welding machining position within the welding device in accordance with the conveying/positioning time.
    Type: Application
    Filed: August 21, 2015
    Publication date: December 17, 2015
    Inventors: Shinya KOJIMA, Masaya SATOU, Takashi SHIGEMATSU, Saburo YAGI, Kentarou SAKAMOTO, Mikio KUWAHARA
  • Publication number: 20150364837
    Abstract: A method for manufacturing a crimp terminal having a crimp portion that allows crimp connection to a conductor part of a coated wire includes forming a tubular body by bringing together side edges of a plate material made of metal composed of a copper alloy having a copper content ratio of greater than or equal to 70%, irradiating a periphery of the sides edges, which are brought together, with laser light from a laser irradiation unit to weld the side edges which are brought together, and setting a power density of the laser light and a sweep rate of the laser light in such a manner that a weld bead formed at the side edge portion after the welding has a width of 80 ?m to 390 ?m.
    Type: Application
    Filed: August 21, 2015
    Publication date: December 17, 2015
    Inventors: Saburo YAGI, Takashi SHIGEMATSU, Masaya SATOU, Shinya KOJIMA, Akira TACHIBANA
  • Publication number: 20150360319
    Abstract: A laser welding apparatus that welds a butted interface of a workpiece by laser light irradiation while successively feeding the workpiece having the butted interface to a welding position includes an X- and Y-axis scanner that scans laser light outputted from a laser light source in an X-axis direction and a Y-axis direction which are orthogonal to each other, a measuring device that measures a dimension along the butted interface, and a scanner control device that controls driving of the X- and Y-axis scanner so as to weld the butted interface by laser light irradiation.
    Type: Application
    Filed: August 21, 2015
    Publication date: December 17, 2015
    Inventors: Saburo YAGI, Takashi SHIGEMATSU, Masaya SATOU, Shinya KOJIMA