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).

  • 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
  • Publication number: 20020157952
    Abstract: A method of treating an acid treatment solution which includes steps of adding sulfuric acid to an acid treatment solution which contains therein non-alkaline metal ions to produce sulfate, and recovering the regenerated acid treatment solution from the acid treatment solution to which the sulfuric acid has been added by separating the sulfate therefrom. Also, a device for realizing the method, and a method of fabricating a support for a planographic printing plate using the same.
    Type: Application
    Filed: February 14, 2002
    Publication date: October 31, 2002
    Applicant: FUJI PHOTO FILM CO., LTD.
    Inventors: Toru Kimura, Tsuyoshi Hirokawa, Toru Yamazaki
  • Patent number: 6325912
    Abstract: This invention provides an apparatus and a method capable of electrolyzing a metal web at a high treating speed and high current density without a problem of uneven treatment, which a metal web is wound, arc-shaped electrodes allocated on the outside of the drum roller concentrically with a space, and an electrolytic solution put in the space, wherein the drum roller is made movable in the vertical direction, and a method using the apparatus.
    Type: Grant
    Filed: February 24, 2000
    Date of Patent: December 4, 2001
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tsuyoshi Hirokawa, Toru Yamazaki
  • Patent number: 6221236
    Abstract: This invention provides an apparatus for electrolytic treatment capable of removing the ununiformity according to the frequency and can achieve high treating speed and high current density treatment, which comprises etching a metal web electrolytically using alternating waveform current continuously, wherein a frequency-variable means having an ability to vary frequency of an electric power supply of said alternating waveform current arbitrarily is provided, and a method therefor.
    Type: Grant
    Filed: June 24, 1999
    Date of Patent: April 24, 2001
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tsuyoshi Hirokawa, Toru Yamazaki, Atsushi Matsuura