Patents by Inventor Hayato Yamaguchi

Hayato 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).

  • Publication number: 20210230415
    Abstract: The present invention relates to a composition containing 20 to 60 parts by mass of a component derived from an ethylene-based copolymer rubber (A), 5 to 30 parts by mass of a component derived from a polypropylene resin (B), 4 to 14 parts by mass of a component derived from a styrene-based thermoplastic elastomer (C) and 5 to 70 parts by mass of a component derived from a softening agent (D) (with the total amount of the components (A), (B), (C) and (D) being 100 parts by mass), wherein a mass ratio of the component derived from the styrene-based thermoplastic elastomer (C) to the component derived from the softening agent (D) ((C)/(D)) is 0.01 to 1; a skin member of an automobile interior part, the skin member comprising the composition; and an automobile interior parts having the skin member.
    Type: Application
    Filed: September 25, 2018
    Publication date: July 29, 2021
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Nana TAKAYAMA, Hayato KURITA, Tomohiro YAMAGUCHI, Yusuke YODA
  • Publication number: 20210094487
    Abstract: A vehicle circuit body is provided. The vehicle circuit body includes a bent portion which is formed by bending a plurality of conductor plates with a convex shape toward one side of a lamination direction in which the plurality of conductor plates are laminated, the plurality of conductor plates being laminated such that adjacent conductor plates are spaced apart from each other; and a rigid portion where the plurality of conductor plates extending from the bent portion are joined together to form a single layer. The bent portion is arranged at a position which faces an inner corner or outer corner of a concave-convex shape formed on a body panel.
    Type: Application
    Filed: September 25, 2020
    Publication date: April 1, 2021
    Inventors: Hayato Yamaguchi, Akira Tsubaki, Sadaharu Okuda, Masahiro Takamatsu
  • Publication number: 20200403544
    Abstract: In the work device that has a self-holding circuit (61) maintaining power supply from a power supply circuit (12) by output from a microcomputer (40) and has a structure in which stopping output to the self-holding circuit (61) causes interruption of power supply from the power supply circuit (12) to the microcomputer (40), the firmware of the microcomputer (40) is made to be rewritable and a power holding unit (condenser (C1)) for temporarily continuing power supply to the microcomputer (40) is provided, thereby realizing a so-called “off-delay timer function” for restarting the microcomputer (40). This configuration enables maintenance of power to the microcomputer (40) after update of the firmware even in a work device that cannot be restarted once power has been turned off unless trigger operation is performed, thereby enabling automatic restart of the microcomputer 40 after resetting is enabled.
    Type: Application
    Filed: February 22, 2019
    Publication date: December 24, 2020
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Yuki ISHIKAWA, Hayato Yamaguchi, Tomomasa NISHIKAWA, Masashi TAKEHISA, Tatsuya ITO
  • Publication number: 20190259984
    Abstract: A battery pack houses first and second cell units that are composed of a plurality of cells, and has a positive electrode power source terminal and a negative electrode power source terminal. This battery pack is provided with a series connector capable of connecting, in series, the first and second cell units and a parallel connector capable of connecting, in parallel, the first and second cell units, and is capable of switching between a parallel connection voltage and a series connection voltage. In the case of attachment to the high voltage electrical device body, the series connector becomes conductive and the parallel connector pair is cut off by the action of the series/parallel switching terminal. In the case of attachment to a low voltage electrical device body, the state is returned to an initial state, the series connector is cut off, and the parallel connector pair becomes conductive.
    Type: Application
    Filed: October 27, 2017
    Publication date: August 22, 2019
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Tomomasa NISHIKAWA, Takuya Teranishi, Naoto Wakatabe, Akira Matsushita, Masaru Hirano, Osamu Kawanobe, Nobuhiro TAKANO, Shinji Watanabe, Hiroyuki HANAWA, Takuhiro Murakami, SHOTA KANNO, Junpei Sato, Hikaru Tamura, Hayato Yamaguchi, Toshio Mizoguchi, Yasushi Nakano, Kazuhiko FUNABASHI, Masayuki Ogura, Yusuke FUNABIKI, Junichi Toukairin, Shota Takeuchi
  • Publication number: 20190260209
    Abstract: In order that the output voltage of a battery pack can be switched and the battery pack can be shared among different voltage electric appliances, this battery pack has a switching mechanism that switches outputting a low voltage by parallel connection of two cell units or outputting a high voltage by series connection of the two cell units, said two cell units each being composed of a plurality of cells connected in series, wherein the switching mechanism is configured from a change-over switch having an operation lever (452). The change-over switch is embedded in a battery pack (400), and an operator is able to manually switch outputting 18 V by setting the operation lever (452) at a first position or outputting 36 V by setting the operation lever (452) at a second position.
    Type: Application
    Filed: October 27, 2017
    Publication date: August 22, 2019
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Tomomasa NISHIKAWA, Masayuki OGURA, Masaru HIRANO, Takuhiro MURAKAMI, Nobuhiro TAKANO, Osamu KAWANOBE, Akira MATSUSHITA, Hayato YAMAGUCHI
  • Publication number: 20190259985
    Abstract: In an upper cell unit (2146) and a lower cell unit (2147) comprising five battery cells, positive electrode terminals (2162, 2172) are set apart and aligned vertically, and negative electrode terminals (2167, 2177) are set apart and aligned vertically. When an electrical device body is rated at 36V, device-side terminals are in contact only at the upper terminals (2162, 2167), and short circuiting of the lower terminals (2172, 2177) is effected using a short bar 2059. When the electrical device body is rated at 18V, the upper and lower terminals (2162 and 2172, 2167 and 2177) are simultaneously made to contact the device-side terminals, and the upper cell unit (2146) and the lower cell unit (2147) assume a parallel connected state. Thus, it is possible to automatically switch the output voltage when a battery pack is mounted according to the difference in terminal shape on the electrical device body side.
    Type: Application
    Filed: October 27, 2017
    Publication date: August 22, 2019
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Hiroyuki HANAWA, Tomomasa NISHIKAWA, SHOTA KANNO, Toshio Mizoguchi, Yasushi Nakano, Kazuhiko FUNABASHI, Takuya Teranishi, Naoto Wakatabe, Shinji Watanabe, Junpei Sato, Hikaru Tamura, Nobuhiro TAKANO, Osamu Kawanobe, Hayato Yamaguchi, Akira Matsushita, Masaru Hirano, Takuhiro Murakami, Masayuki Ogura, Yusuke Funabiki, Junichi Toukairin, Shota Takeuchi
  • Publication number: 20190140567
    Abstract: In order to provide a power supply device capable of supplying power to an electric device, predetermined control of which is performed upon detecting zero crossing, and an electric device which operates by receiving a supply of power from the power supply device, the power supply device 1 includes: a battery pack 10; a plug receptacle 8 for outputting a voltage of the battery pack 10; a switching component 14 disposed on a discharge path connected to the plug receptacle 8 from the battery pack 10; and a control part 13 for controlling the switching component 14. The control part 13 temporarily turns off the switching component 14 at a cycle twice that of a commercial power supply.
    Type: Application
    Filed: March 31, 2017
    Publication date: May 9, 2019
    Applicant: Koki Holdings Co., Ltd.
    Inventors: Hayato YAMAGUCHI, Eiji NAKAYAMA
  • Patent number: 10201865
    Abstract: A portable electric cutter includes a housing in which a motor is accommodated, a saw blade driven to rotate by the motor, a base coupled to the housing and having a bottom surface slidable on a surface of a material to be cut, a fan driven to rotate by the motor, a driving circuit for switching power supplied to the motor, and a control circuit for controlling the driving circuit. A circuit board on which the driving circuit, the control circuit and others are mounted is provided, motor cooling air vents are provided in the housing on a side opposite to the saw blade, and circuit board cooling air vents are provided in the housing on the side opposite to the saw blade.
    Type: Grant
    Filed: October 2, 2017
    Date of Patent: February 12, 2019
    Assignee: Koki Holdings Co., Ltd.
    Inventors: Hayato Yamaguchi, Hideyuki Tanimoto, Kenichirou Yoshida, Shinji Kuragano
  • Publication number: 20180021865
    Abstract: A portable electric cutter includes a housing in which a motor is accommodated, a saw blade driven to rotate by the motor, a base coupled to the housing and having a bottom surface slidable on a surface of a material to be cut, a fan driven to rotate by the motor, a driving circuit for switching power supplied to the motor, and a control circuit for controlling the driving circuit. A circuit board on which the driving circuit, the control circuit and others are mounted is provided, motor cooling air vents are provided in the housing on a side opposite to the saw blade, and circuit board cooling air vents are provided in the housing on the side opposite to the saw blade.
    Type: Application
    Filed: October 2, 2017
    Publication date: January 25, 2018
    Inventors: Hayato YAMAGUCHI, Hideyuki TANIMOTO, Kenichirou YOSHIDA, Shinji KURAGANO
  • Patent number: 9808872
    Abstract: A portable electric cutter includes a housing 2 in which a motor 1 is accommodated, a saw blade driven to rotate by the motor, a base 6 coupled to the housing 2 and having a bottom surface slidable on a surface of a material to be cut, a fan 7 driven to rotate by the motor, a driving circuit for switching power supplied to the motor, and a control circuit for controlling the driving circuit. A circuit board 60 on which the driving circuit, the control circuit and others are mounted is provided, motor cooling air vents are provided in the housing 2 on a side opposite to the saw blade, and circuit board cooling air vents are provided in the housing 2 on the side opposite to the saw blade.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: November 7, 2017
    Assignee: HITACHI KOKI CO., LTD.
    Inventors: Hayato Yamaguchi, Hideyuki Tanimoto, Kenichirou Yoshida, Shinji Kuragano
  • Patent number: 9616558
    Abstract: According to an aspect of the present invention, there is provided an impact tool including: a motor; a hammer connected to an output portion of the motor; and an anvil to be struck by the hammer in a rotation direction and having a rotary shaft, the hammer striking the anvil in the rotation direction by driving the motor in pulses, wherein the anvil is provided in front of the hammer, wherein the hammer is driven in pulses by the motor, and wherein a rotation angle of the hammer is substantially proportional to a rotation angle of the motor.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: April 11, 2017
    Assignee: HITACHI KOKI CO., LTD.
    Inventors: Tomomasa Nishikawa, Nobuhiro Takano, Hideyuki Tanimoto, Kazutaka Iwata, Hironori Mashiko, Hayato Yamaguchi, Atsushi Nakagawa, Katsuhiro Oomori, Mizuho Nakamura, Hiroki Uchida, Saroma Nakano, Chikai Yoshimizu
  • Patent number: 9397535
    Abstract: In a brushless motor, a rotor core is fixed to a shaft. Through holes are formed in the rotor core, and permanent magnets are inserted to be fixed in place in the through holes. A stator core is fixed to an outer circumferential surface of the rotor core such that the stator core faces the outer circumferential surface of the rotor core. Stator coils are provided on the stator core via insulators so as to configure magnetic flux generating portions. A cooling fan is provided in front of a stator which is configured by the stator core and the stator coils. Axial position of blades of the fan and axial positions of the rotor core and the permanent magnets partially overlap each other in their positions.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: July 19, 2016
    Assignee: HITACHI KOKI CO., LTD.
    Inventors: Hayato Yamaguchi, Hideyuki Tanimoto
  • Patent number: 9314908
    Abstract: According to an aspect of the present invention, there is provided an impact tool including: a motor drivable in an intermittent driving mode; a hammer connected to the motor; an anvil to be struck by the hammer to thereby rotate/strike a tip tool; and a control unit that controls a rotation of the motor by switching a driving pulse supplied to the motor in accordance with a load applied onto the tip tool.
    Type: Grant
    Filed: July 29, 2010
    Date of Patent: April 19, 2016
    Assignee: HITACHI KOKI CO., LTD.
    Inventors: Hideyuki Tanimoto, Nobuhiro Takano, Tomomasa Nishikawa, Kazutaka Iwata, Hironori Mashiko, Hayato Yamaguchi, Atsushi Nakagawa, Katsuhiro Oomori, Mizuho Nakamura, Hiroki Uchida, Saroma Nakano, Yutaka Ito
  • Patent number: 9197153
    Abstract: A power tool includes a housing, an electric motor accommodated in the housing, a secondary battery that supplies electric power to the electric motor, a handle provided at the housing, a trigger switch provided at the handle for controlling electric power supply to the electric motor, a residual capacity display for displaying a residual capacity of the secondary battery, and a lock-release switch provided at the handle and configured to allow the trigger switch to be operable and to start displaying the residual capacity at the residual capacity display upon manipulation to the lock-release switch.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: November 24, 2015
    Assignee: Hitachi Koki Co., Ltd.
    Inventors: Kenichirou Yoshida, Hideyuki Tanimoto, Hayato Yamaguchi, Shinji Kuragano, Takuya Konnai
  • Publication number: 20150041167
    Abstract: To provide an electric working machine, in which a brushless motor is mounted, in order to improve energy efficiency. An electric working machine includes: a disk motor including a rotor having a permanent magnet pole, an output shaft fixed to the rotor and serving as a rotation center of the rotor and a stator configured to generate a magnetic field with respect to the rotor; and a housing configured to accommodate the rotor therein and to rotatably support the output shaft. The stator includes: a magnetic yoke facing the rotor; and a coil board provided on a surface of the yoke facing the rotor. The stator is fixed to the housing side. The coil board has an extension portion on an outer circumferential edge thereof. Electric circuit elements for a motor driving circuit are mounted on the extension portion.
    Type: Application
    Filed: March 27, 2013
    Publication date: February 12, 2015
    Inventors: Hayato Yamaguchi, Hideyuki Tanimoto
  • Publication number: 20150026985
    Abstract: A portable electric cutter includes a housing 2 in which a motor 1 is accommodated, a saw blade driven to rotate by the motor, a base 6 coupled to the housing 2 and having a bottom surface slidable on a surface of a material to be cut, a fan 7 driven to rotate by the motor, a driving circuit for switching power supplied to the motor, and a control circuit for controlling the driving circuit. A circuit board 60 on which the driving circuit, the control circuit and others are mounted is provided, motor cooling air vents are provided in the housing 2 on a side opposite to the saw blade, and circuit board cooling air vents are provided in the housing 2 on the side opposite to the saw blade.
    Type: Application
    Filed: March 13, 2013
    Publication date: January 29, 2015
    Inventors: Hayato Yamaguchi, Hideyuki Tanimoto, Kenichirou Yoshida, Shinji Kuragno
  • Publication number: 20140084717
    Abstract: In a brushless motor, a rotor core is fixed to a shaft. Through holes are formed in the rotor core, and permanent magnets are inserted to be fixed in place in the through holes. A stator core is fixed to an outer circumferential surface of the rotor core such that the stator core faces the outer circumferential surface of the rotor core. Stator coils are provided on the stator core via insulators so as to configure magnetic flux generating portions. A cooling fan is provided in front of a stator which is configured by the stator core and the stator coils. Axial position of blades of the fan and axial positions of the rotor core and the permanent magnets partially overlap each other in their positions.
    Type: Application
    Filed: August 5, 2013
    Publication date: March 27, 2014
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Hayato Yamaguchi, Hideyuki Tanimoto
  • Publication number: 20140028223
    Abstract: A power tool includes a housing, an electric motor accommodated in the housing, a secondary battery that supplies electric power to the electric motor, a handle provided at the housing, a trigger switch provided at the handle for controlling electric power supply to the electric motor, a residual capacity display for displaying a residual capacity of the secondary battery, and a lock-release switch provided at the handle and configured to allow the trigger switch to be operable and to start displaying the residual capacity at the residual capacity display upon manipulation to the lock-release switch.
    Type: Application
    Filed: July 22, 2013
    Publication date: January 30, 2014
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Kenichirou Yoshida, Hideyuki Tanimoto, Hayato Yamaguchi, Shinji Kuragano, Takuya Konnai
  • Publication number: 20130333910
    Abstract: According to one embodiment, an impact tool includes: a motor; and a hammer that is connected to the motor and that has a striking-side surface; and an anvil that is journalled to be rotatable with respect to the hammer, that has a struck-side surface and that provides a striking power to a tip tool, wherein the motor is drivable in: a first driving mode in which the motor is continuously driven in a normal rotation; a second driving mode in which the motor is intermittently driven only in the normal rotation; and a third driving mode in which the motor is intermittently driven in the normal rotation and in a reverse rotation.
    Type: Application
    Filed: July 29, 2010
    Publication date: December 19, 2013
    Applicant: HITACHI KOKI CO., LTD.,
    Inventors: Hideyuki Tanimoto, Nobuhiro Takano, Tomomasa Nishikawa, Kazutaka Iwata, Hironori Mashiko, Hayato Yamaguchi, Atsushi Nakagawa, Katsuhiro Oomori, Mizuho Nakamura, Hiroki Uchida, Saroma Nakano
  • Publication number: 20130062088
    Abstract: An impact tool including: a motor; a speed-reduction mechanism that reduces a torque of the motor; a hammer connected to an output portion of the speed-reduction mechanism; and an anvil that can be swung relatively to the hammer, wherein the hammer is directly driven by the motor, and wherein the impact tool can operate in: a drill mode in which an end tool attached to the anvil is rotated by rotating the hammer in one direction so as to rotate the anvil; and an impact mode in which the end tool attached to the anvil is rotated while the hammer intermittently strikes the anvil.
    Type: Application
    Filed: February 21, 2011
    Publication date: March 14, 2013
    Applicant: HITACHI KOKI CO., LTD.
    Inventors: Hironori Mashiko, Tomomasa Nishikawa, Hayato Yamaguchi