Patents by Inventor Tsuyoshi Hirokawa

Tsuyoshi Hirokawa 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).

  • Patent number: 10875346
    Abstract: The present invention provides a lithographic printing plate precursor that enables a lithographic printing plate formed therefrom to have excellent image visibility and a long press life, as well as a lithographic printing plate manufacturing method and a printing method.
    Type: Grant
    Filed: October 30, 2018
    Date of Patent: December 29, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Ryo Nakamura, Atsushi Matsuura, Tsuyoshi Hirokawa
  • Patent number: 10873237
    Abstract: A motor includes a stationary portion, a rotating portion that includes a shaft rotating about a vertically extending central axis, and a bearing portion that rotatably supports the shaft with respect to the stationary portion. The stationary portion includes a cylindrical bearing housing portion that holds the bearing portion, a stator that is radially outward of the bearing housing portion and includes a stator core, a circuit board that is below the stator core, and an annular spacer that is between the stator core and the bearing housing portion. The spacer includes multiple side wall portions that contact a radially inner surface of the stator core and a flange portion that protrudes radially outward more than the side wall portion and contacts a lower surface of the stator core.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: December 22, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Shinji Takemoto, Keizo Furukawa, Tsuyoshi Hirokawa
  • Patent number: 10873238
    Abstract: A motor includes a stationary portion, a rotating portion that includes a shaft rotating about a vertically extending central axis, and a bearing portion that rotatably supports the shaft with respect to the stationary portion. The stationary portion includes a cylindrical bearing housing portion that holds the bearing portion, a stator that is radially outward of the bearing housing portion, a circuit board that is below the stator, and an annular spacer that is between the stator and the bearing housing portion. The stator includes a stator core that includes an annular core back and multiple teeth that extend radially outward from the core back and are arranged in a circumferential direction, an insulating film that covers a surface of the teeth, extends radially inward from a lower surface of the teeth, and covers a lower outer edge portion of the core back, and a coil provided on the teeth.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: December 22, 2020
    Assignee: NIDEC CORPORATION
    Inventors: Shinji Takemoto, Keizo Furukawa, Tsuyoshi Hirokawa
  • Patent number: 10843166
    Abstract: Adsorbent particle includes iron oxyhydroxide as a main component, wherein 90% or more of volume of particle is constituted of a granular crystal having a crystal grain size of 20 nm or less or a columnar crystal having a width of 10 nm or less and length of 30 nm or less and particle has BET specific surface area of 250 m2/g or more. Above adsorbent particle is produced by a method including a step of generating iron oxyhydroxide by adding base represented by YOH (wherein Y represents a monovalent atom or atomic group) to solution including at least one selected from trivalent iron compounds represented by FeX3 (wherein X represents a monovalent atom or atomic group other than OH) while adjusting pH to pH 3 to 6, wherein solution has total concentration of FeX3, YOH and other electrolytes of 10% by mass or more at completion of the step.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: November 24, 2020
    Assignees: TAKAHASHI METAL INDUSTRIES CO., LTD., NIPPON SODA CO., LTD.
    Inventors: Toshiyasu Hirokawa, Tsuyoshi Noishiki, Nobuo Kimura, Masato Amaike, Yukiko Takahashi
  • Patent number: 10612638
    Abstract: In a speed reducing unit with an electric motor, a speed reduction mechanism has: an elliptical cam that rotates together with a rotating part; a flexible external gear that deforms according to the rotation of the elliptical cam; a flexible bearing that is located between the elliptical cam and the flexible external gear; and a movable internal gear that rotates together with an output part. The flexible external gear and the movable internal gear are engaged with each other. The electric motor has: a rotor holder that is part of the rotating part and that rotates together with the elliptical cam; a rotor magnet that is fixed to the rotor holder; and a stator that is fixed to a casing. The rotor holder has a rotor-holder lid part, and the positions of the rotor-holder lid part and the flexible bearing in the axial direction at least partially overlap.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: April 7, 2020
    Assignees: NIDEC-SHIMPO CORPORATION, NIDEC CORPORATION
    Inventors: Tomoyuki Otsuka, Takuro Yonemura, Tsuyoshi Hirokawa, Kosuke Mizuike
  • Publication number: 20200067370
    Abstract: A motor includes a stationary portion, a rotating portion that includes a shaft rotating about a vertically extending central axis, and a bearing portion that rotatably supports the shaft with respect to the stationary portion. The stationary portion includes a cylindrical bearing housing portion that holds the bearing portion, a stator that is radially outward of the bearing housing portion and includes a stator core, a circuit board that is below the stator core, and an annular spacer that is between the stator core and the bearing housing portion. The spacer includes multiple side wall portions that contact a radially inner surface of the stator core and a flange portion that protrudes radially outward more than the side wall portion and contacts a lower surface of the stator core.
    Type: Application
    Filed: June 21, 2019
    Publication date: February 27, 2020
    Inventors: Shinji TAKEMOTO, Keizo FURUKAWA, Tsuyoshi HIROKAWA
  • Publication number: 20200067373
    Abstract: A motor includes a stationary portion, a rotating portion that includes a shaft rotating about a vertically extending central axis, and a bearing portion that rotatably supports the shaft with respect to the stationary portion. The stationary portion includes a cylindrical bearing housing portion that holds the bearing portion, a stator that is radially outward of the bearing housing portion, a circuit board that is below the stator, and an annular spacer that is between the stator and the bearing housing portion. The stator includes a stator core that includes an annular core back and multiple teeth that extend radially outward from the core back and are arranged in a circumferential direction, an insulating film that covers a surface of the teeth, extends radially inward from a lower surface of the teeth, and covers a lower outer edge portion of the core back, and a coil provided on the teeth.
    Type: Application
    Filed: June 21, 2019
    Publication date: February 27, 2020
    Inventors: Shinji TAKEMOTO, Keizo FURUKAWA, Tsuyoshi HIROKAWA
  • Patent number: 10525696
    Abstract: A lithographic printing plate precursor, a lithographic printing plate manufacturing method, a printing method and an aluminum support manufacturing method enable the resulting lithographic printing plate to have a long tiny dot press life. The lithographic printing plate precursor includes an aluminum support and an image recording layer. When measured over a 400 ?m×400 ?m region of a surface of the aluminum support on the image recording layer side using a three-dimensional non-contact roughness tester, pits with a depth from centerline of at least 0.70 ?m are present at a density of at least 3,000 pits/mm2. A surface area ratio ?S is not less than 35%, where ?S is determined using an actual area Sx obtained, through three-point approximation, from three-dimensional data acquired by measurement at 512×512 points in 25 ?m square of the surface of the aluminum support on the image recording layer side.
    Type: Grant
    Filed: January 11, 2019
    Date of Patent: January 7, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Ryo Nakamura, Atsushi Matsuura, Tsuyoshi Hirokawa
  • Patent number: 10439473
    Abstract: An electric motor-attached speed reducer includes a first member, an electric motor, a speed reduction mechanism, and a second member. The electric motor is arranged to produce rotational motion with respect to the first member. The speed reduction mechanism is arranged to transfer the rotational motion obtained from the electric motor while reducing the speed thereof. The second member is arranged to rotate relative to the first member at a rotation rate resulting from the speed reduction. A first bearing is arranged between the first and second members. A second bearing is arranged between the first member and a rotor of the electric motor. The speed reduction mechanism includes a flexible third bearing arranged between a non-perfect circular cam and a flexible external gear. The second bearing is arranged to radially overlap with a rotor holder at a first axial position.
    Type: Grant
    Filed: February 1, 2017
    Date of Patent: October 8, 2019
    Assignee: NIDEC CORPORATION
    Inventors: Tsuyoshi Hirokawa, Kosuke Mizuike
  • Publication number: 20190143666
    Abstract: The present invention aims at providing a lithographic printing plate precursor, a lithographic printing plate manufacturing method, a printing method and an aluminum support manufacturing method that enable the resulting lithographic printing plate to have a long tiny dot press life. The lithographic printing plate precursor of the invention is a lithographic printing plate precursor having an aluminum support and an image recording layer disposed above the aluminum support. When measured over a 400 ?m×400 ?m region of a surface of the aluminum support on the image recording layer side using a three-dimensional non-contact roughness tester, pits with a depth from centerline of at least 0.
    Type: Application
    Filed: January 11, 2019
    Publication date: May 16, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Ryo NAKAMURA, Atsushi MATSUURA, Tsuyoshi HIROKAWA
  • Publication number: 20190061404
    Abstract: The present invention provides a lithographic printing plate precursor that enables a lithographic printing plate formed therefrom to have excellent image visibility and a long press life, as well as a lithographic printing plate manufacturing method and a printing method.
    Type: Application
    Filed: October 30, 2018
    Publication date: February 28, 2019
    Applicant: FUJIFILM Corporation
    Inventors: Ryo NAKAMURA, Atsushi MATSUURA, Tsuyoshi HIROKAWA
  • Publication number: 20180355964
    Abstract: In a speed reducing unit with an electric motor, a speed reduction mechanism has: an elliptical cam that rotates together with a rotating part; a flexible external gear that deforms according to the rotation of the elliptical cam; a flexible bearing that is located between the elliptical cam and the flexible external gear; and a movable internal gear that rotates together with an output part. The flexible external gear and the movable internal gear are engaged with each other. The electric motor has: a rotor holder that is part of the rotating part and that rotates together with the elliptical cam; a rotor magnet that is fixed to the rotor holder; and a stator that is fixed to a casing. The rotor holder has a rotor-holder lid part, and the positions of the rotor-holder lid part and the flexible bearing in the axial direction at least partially overlap.
    Type: Application
    Filed: November 29, 2016
    Publication date: December 13, 2018
    Applicants: NIDEC-SHIMPO CORPORATION, NIDEC CORPORATION
    Inventors: Tomoyuki OTSUKA, Takuro YONEMURA, Tsuyoshi HIROKAWA, Kosuke MIZUIKE
  • Publication number: 20180076696
    Abstract: A stationary portion of a motor includes a stator core including teeth, an insulator covering a surface of the stator core, a coil including a conductive wire, a housing, and a circuit board. The housing includes a cylindrical portion in which the stator core is fixed to the outer circumference thereof and a base portion extending from the cylindrical portion radially outward. The circuit board is disposed above the base portion and below the stator core, to which the conductive wire is electrically connected. The insulator includes a tubular portion covering the outer circumference of the cylindrical portion and a vertically deformable elastic portion protruding from the tubular portion radially outward. The circuit board is fixed to the upper surface of a seat portion of the base portion. The circuit board is in contact with the lower surface of the elastic portion radially inside the seat portion.
    Type: Application
    Filed: August 31, 2017
    Publication date: March 15, 2018
    Inventors: Kosuke MIZUIKE, Tsuyoshi HIROKAWA, Kenji FUKAMI, Koji KADOWAKI
  • Publication number: 20170237315
    Abstract: An electric motor-attached speed reducer includes a first member, an electric motor, a speed reduction mechanism, and a second member. The electric motor is arranged to produce rotational motion with respect to the first member. The speed reduction mechanism is arranged to transfer the rotational motion obtained from the electric motor while reducing the speed thereof. The second member is arranged to rotate relative to the first member at a rotation rate resulting from the speed reduction. A first bearing is arranged between the first and second members. A second bearing is arranged between the first member and a rotor of the electric motor. The speed reduction mechanism includes a flexible third bearing arranged between a non-perfect circular cam and a flexible external gear. The second bearing is arranged to radially overlap with a rotor holder at a first axial position.
    Type: Application
    Filed: February 1, 2017
    Publication date: August 17, 2017
    Inventors: Tsuyoshi HIROKAWA, Kosuke MIZUIKE
  • Patent number: 8968530
    Abstract: An electrolytic treatment method and electrolytic treatment device are provided for electrolytic treatment of an aluminum web W by applying an alternating current to an upstream electrode and a downstream electrode disposed along a conveying direction a. At least one of a conveying velocity v of the aluminum web W, a frequency f of alternating current applied at the upstream electrode and the downstream electrode, and/or a web conveying direction separation distance d2 between the upstream electrode and the downstream electrode are set such that the alternating current and voltage waveform applied to the aluminum web W at the far end of the upstream electrode and the alternating current and voltage waveform applied to the aluminum web W at the near end of the downstream electrode do not reinforce each other.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: March 3, 2015
    Assignee: FUJIFILM Corporation
    Inventors: Hisashi Hotta, Tsuyoshi Hirokawa
  • Patent number: 8922080
    Abstract: A bus bar which electrically connects end portions of a plurality of conductive lines and a method for manufacturing the bus bar are such that an intermediate region of a single wire rod is folded to define a plurality of terminal forming portions extending to a lateral direction of the wire rod. The whole wire rod including the terminal forming portion is rolled. The rolled wire rod is bent into a certain shape.
    Type: Grant
    Filed: October 28, 2011
    Date of Patent: December 30, 2014
    Assignee: Nidec Corporation
    Inventors: Airi Nakagawa, Tomoyoshi Yokogawa, Tsuyoshi Hirokawa, Takahiro Hattori
  • Publication number: 20130181569
    Abstract: A bus bar which electrically connects end portions of a plurality of conductive lines and a method for manufacturing the bus bar are such that an intermediate region of a single wire rod is folded to define a plurality of terminal forming portions extending to a lateral direction of the wire rod. The whole wire rod including the terminal forming portion is rolled. The rolled wire rod is bent into a certain shape.
    Type: Application
    Filed: October 28, 2011
    Publication date: July 18, 2013
    Applicant: Nidec Corporation
    Inventors: Airi Nakagawa, Tomoyoshi Yokogawa, Tsuyoshi Hirokawa, Takahiro Hattori
  • Publication number: 20120286593
    Abstract: A stator is compatible with a variety of wiring configurations and possesses excellent versatility, while also preventing an increase in the size of a busbar unit. The stator includes a plurality of stator segments joined together to assume a cylindrical shape. Each stator segment includes a core segment including a core back portion and a tooth portion; a coil including a pair of coil wire terminals; an insulating layer arranged between the coil and the tooth portion; and a resin layer arranged to have the entire coil except for the coil wire terminals embedded therein. The resin layers of the stator segments include a supporting structure defined therein to allow a wiring member to be connected with any of the coil wire terminals to be attached to and removed from the stator.
    Type: Application
    Filed: February 28, 2011
    Publication date: November 15, 2012
    Applicant: NIDEC CORPORATION
    Inventors: Tomoyoshi Yokogawa, Airi Nakagawa, Tsuyoshi Hirokawa
  • Publication number: 20110174635
    Abstract: An electrolytic treatment method and electrolytic treatment device are provided for electrolytic treatment of an aluminum web W by applying an alternating current to an upstream electrode and a downstream electrode disposed along a conveying direction a. At least one of a conveying velocity v of the aluminum web W, a frequency f of alternating current applied at the upstream electrode and the downstream electrode, and/or a web conveying direction separation distance d2 between the upstream electrode and the downstream electrode are set such that the alternating current and voltage waveform applied to the aluminum web W at the far end of the upstream electrode and the alternating current and voltage waveform applied to the aluminum web W at the near end of the downstream electrode do not reinforce each other.
    Type: Application
    Filed: September 30, 2009
    Publication date: July 21, 2011
    Inventors: Hisashi Hotta, Tsuyoshi Hirokawa
  • Publication number: 20030105533
    Abstract: An object of the present invention is to provide an electrolysis apparatus that can prevent formation of surface defects such as white bands on an obtained aluminum support for a planographic printing plate even when electrolyzing an aluminum strip at a high current density while conveying the aluminum strip at a high conveyance velocity.
    Type: Application
    Filed: December 4, 2002
    Publication date: June 5, 2003
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Tsuyoshi Hirokawa, Toru Yamazaki