Patents by Inventor Toshiyuki Igarashi

Toshiyuki Igarashi 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: 11756714
    Abstract: Provided is a composite magnetic material in which low electrical conductivity and high magnetic permeability are achieved, and in which a frequency band in which decoupling is caused encompasses higher frequencies. The composite magnetic material comprises a flat soft magnetic metal powder; insulating particles which are smaller than an average thickness of the soft magnetic metal powder and which are disposed on a surface of the soft magnetic metal powder; and an organic binder material which retains the soft magnetic metal powder and the insulating particles in a dispersed manner. In a cross section in a thickness direction of the soft magnetic metal powder, there is at least one insulating particle per a length of 0.2 ?m of the soft magnetic metal powder surface.
    Type: Grant
    Filed: April 28, 2016
    Date of Patent: September 12, 2023
    Assignee: TOKIN CORPORATION
    Inventor: Toshiyuki Igarashi
  • Patent number: 10829617
    Abstract: Provided is a composite magnetic body composite magnetic body including a flaky metallic soft magnetism powder with a volume content of 35% or more and 55% or less, wherein the composite magnetic body is characterized by further including a phosphazene compound, a binder resin, and a phosphorus-free flame retardant auxiliary so that equations (1) and (2) are satisfied: 0.17?P/B?0.21??(1) 0.89?(PN+RA)/B?2.71??(2) (In the equations, PN denotes the mass % of the phosphazene compound in the composite magnetic body, RA denotes the mass % of the flame retardant auxiliary in the composite magnetic body, B denotes the mass % of the binder resin in the composite magnetic body, and P denotes the mass % of phosphorus in the composite magnetic body.) The composite magnetic body can impart high flame retardancy without losing performance such as magnetic permeability.
    Type: Grant
    Filed: July 6, 2016
    Date of Patent: November 10, 2020
    Assignee: TOKIN CORPORATION
    Inventors: Toshiyuki Igarashi, Hiroyuki Yoshida, Masahiko Fuji, Masakazu Abe
  • Patent number: 10729044
    Abstract: An electromagnetic interference suppressor is disposed so as to be effective for noise in a wide frequency band including a high frequency band. Provided is an electronic device including an electromagnetic interference suppressor; an interfering object configured to generate an electromagnetic wave; an interfered object to be affected by the electromagnetic wave; a substrate configured to mount thereon the interfering object and the interfered object; and the electromagnetic interference suppressor disposed in parallel to the substrate, and is disposed along only one of the interfering object and the interfered object. When an end portion of the interfering object opposed to the interfered object is defined as a first end portion, and an end portion of the interfered object opposed to the interfering object is defined as a second end portion, one end portion of the electromagnetic interference suppressor is disposed between the first end portion and the second end portion.
    Type: Grant
    Filed: May 26, 2016
    Date of Patent: July 28, 2020
    Assignee: TOKIN CORPORATION
    Inventors: Koichi Kondo, Toshiaki Oka, Masashi Ikeda, Toshiyuki Igarashi
  • Publication number: 20190035525
    Abstract: Provided is a composite magnetic material in which low electrical conductivity and high magnetic permeability are achieved, and in which a frequency band in which decoupling is caused encompasses higher frequencies. The composite magnetic material comprises a flat soft magnetic metal powder; insulating particles which are smaller than an average thickness of the soft magnetic metal powder and which are disposed on a surface of the soft magnetic metal powder; and an organic binder material which retains the soft magnetic metal powder and the insulating particles in a dispersed manner. In a cross section in a thickness direction of the soft magnetic metal powder, there is at least one insulating particle per a length of 0.2 ?m of the soft magnetic metal powder surface.
    Type: Application
    Filed: April 28, 2016
    Publication date: January 31, 2019
    Applicant: TOKIN CORPORATION
    Inventor: Toshiyuki IGARASHI
  • Publication number: 20190008079
    Abstract: An electromagnetic interference suppressor is disposed so as to be effective for noise in a wide frequency band including a high frequency band. Provided is an electronic device including an electromagnetic interference suppressor; an interfering object configured to generate an electromagnetic wave; an interfered object to be affected by the electromagnetic wave; a substrate configured to mount thereon the interfering object and the interfered object; and the electromagnetic interference suppressor disposed in parallel to the substrate, and is disposed along only one of the interfering object and the interfered object. When an end portion of the interfering object opposed to the interfered object is defined as a first end portion, and an end portion of the interfered object opposed to the interfering object is defined as a second end portion, one end portion of the electromagnetic interference suppressor is disposed between the first end portion and the second end portion.
    Type: Application
    Filed: May 26, 2016
    Publication date: January 3, 2019
    Applicant: TOKIN CORPORATION
    Inventors: Koichi KONDO, Toshiaki OKA, Masashi IKEDA, Toshiyuki IGARASHI
  • Patent number: 10145780
    Abstract: A thread gauge, which allows to reliably know the time for replacement by visual checking and improves the predetermined dimensional accuracy of a thread product has a go-side thread measuring portion extending from one side of a shank portion coaxially with the shank portion or a not-go-side thread measuring portion extending from an other side of the shank portion coaxially with the shank portion, a wear checking gauge line having a predetermined length and a predetermined depth formed on male thread portions and female thread portions formed on the go-side thread measuring portion or the not-go-side thread measuring portion.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: December 4, 2018
    Assignee: NIIGATA SEIKI CO., LTD.
    Inventor: Toshiyuki Igarashi
  • Publication number: 20180201762
    Abstract: Provided is a composite magnetic body composite magnetic body including a flaky metallic soft magnetism powder with a volume content of 35% or more and 55% or less, wherein the composite magnetic body is characterized by further including a phosphazene compound, a binder resin, and a phosphorus-free flame retardant auxiliary so that equations (1) and (2) are satisfied: 0.17?P/B?0.21??(1) 0.89?(PN+RA)/B?2.71??(2) (In the equations, PN denotes the mass % of the phosphazene compound in the composite magnetic body, RA denotes the mass % of the flame retardant auxiliary in the composite magnetic body, B denotes the mass % of the binder resin in the composite magnetic body, and P denotes the mass % of phosphorus in the composite magnetic body.) The composite magnetic body can impart high flame retardancy without losing performance such as magnetic permeability.
    Type: Application
    Filed: July 6, 2016
    Publication date: July 19, 2018
    Applicant: TOKIN Corporation
    Inventors: Toshiyuki IGARASHI, Hiroyuki YOSHIDA, Masanhiko FUJI, Masakazu ABE
  • Patent number: 9534881
    Abstract: A ring gauge with a maintenance line, which can reliably and quickly let a user know at an early stage the time for replacement during maintenance of a ring gauge, is provided with a ring gauge body which has, on an inner portion, a hole-shaped measuring portion having a circular shape in a planar view and serving as a reference for various types of measuring devices, a predetermined thickness, an upper surface portion, a lower surface portion, and a wear checking gauge line which can have a linear shape formed on an inner diameter portion of the hole-shaped measuring portion.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: January 3, 2017
    Assignee: NIIGATA SEIKI CO., LTD.
    Inventor: Toshiyuki Igarashi
  • Patent number: 9476821
    Abstract: Due to repeated use of a gauge portion, used to perform positioning and accuracy comparison measurement at the time of manufacture of various type of molds for metalworking, a gauge line on an outer circumferential surface portion of the gauge portion can disappear due to friction. A plug gauge body, which helps a user recognize the time for maintenance and replacement of the plug gauge, has a constricted portion formed on one side of a shank portion and a cylindrical gauge portion having a uniform diameter and extending from one side of the constricted portion, with the shank portion, the constricted portion, and the gauge portion, being formed axially, a wear checking gauge line having a predetermined depth and width formed so as to extend from one end portion of an outer circumferential surface portion of the gauge portion in the direction of the constricted portion.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: October 25, 2016
    Assignee: NIIGATA SEIKI CO., LTD.
    Inventor: Toshiyuki Igarashi
  • Patent number: 9468134
    Abstract: In order to provide a noise suppression sheet whose imaginary part magnetic permeability ??, representing a magnetic loss component, is large at a GHz-band frequency, thus having an excellent noise suppression effect, the noise suppression sheet comprises a flat magnetic powder having a saturation magnetostriction of 12.0×10?6 or more and 38.0×10?6 or less and an organic binder.
    Type: Grant
    Filed: February 20, 2013
    Date of Patent: October 11, 2016
    Assignee: NEC TOKIN CORPORATION
    Inventor: Toshiyuki Igarashi
  • Patent number: 9372146
    Abstract: A thread gauge, which allows to reliably know the time for replacement by visual checking and improves the predetermined dimensional accuracy of a thread product has a go-side thread measuring portion extending from one side of a shank portion coaxially with the shank portion or a not-go-side thread measuring portion extending from an other side of the shank portion coaxially with the shank portion, a wear checking gauge line having a predetermined length and a predetermined depth formed on male thread portions and female thread portions formed on the go-side thread measuring portion or the not-go-side thread measuring portion.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: June 21, 2016
    Assignee: NIIGATA SEIKI CO., LTD.
    Inventor: Toshiyuki Igarashi
  • Publication number: 20160103060
    Abstract: A thread gauge, which allows to reliably know the time for replacement by visual checking and improves the predetermined dimensional accuracy of a thread product has a go-side thread measuring portion extending from one side of a shank portion coaxially with the shank portion or a not-go-side thread measuring portion extending from an other side of the shank portion coaxially with the shank portion, a wear checking gauge line having a predetermined length and a predetermined depth formed on male thread portions and female thread portions formed on the go-side thread measuring portion or the not-go-side thread measuring portion.
    Type: Application
    Filed: December 17, 2015
    Publication date: April 14, 2016
    Applicant: NIIGATA SEIKI CO., LTD.
    Inventor: Toshiyuki IGARASHI
  • Patent number: 9208932
    Abstract: A magnetic powder comprises a first magnetic particle, one or more inorganic insulating particles and one or more second magnetic particles. The first magnetic particle is made of a soft magnetic metal. The first magnetic particle has a flat shape. The inorganic insulating particles are attached to the first magnetic particle. The inorganic insulating particles partially cover the first magnetic particle. Each of the second magnetic particles is made of a soft magnetic metal. Each of the second magnetic particles has a flat shape. The second magnetic particles are attached to the first magnetic particle via the inorganic insulating particles.
    Type: Grant
    Filed: October 3, 2013
    Date of Patent: December 8, 2015
    Assignee: NEC TOKIN CORPORATION
    Inventor: Toshiyuki Igarashi
  • Publication number: 20140299043
    Abstract: A thread gauge, which allows to reliably know the time for replacement by visual checking and improves the predetermined dimensional accuracy of a thread product has a go-side thread measuring portion extending from one side of a shank portion coaxially with the shank portion or a not-go-side thread measuring portion extending from an other side of the shank portion coaxially with the shank portion, a wear checking gauge line having a predetermined length and a predetermined depth formed on male thread portions and female thread portions formed on the go-side thread measuring portion or the not-go-side thread measuring portion.
    Type: Application
    Filed: January 31, 2014
    Publication date: October 9, 2014
    Applicant: NIIGATA SEIKI CO., LTD.
    Inventor: Toshiyuki IGARASHI
  • Publication number: 20140299042
    Abstract: Due to repeated use of a gauge portion, used to perform positioning and accuracy comparison measurement at the time of manufacture of various type of molds for metalworking, a gauge line on an outer circumferential surface portion of the gauge portion can disappear due to friction. A plug gauge body, which helps a user recognize the time for maintenance and replacement of the plug gauge, has a constricted portion formed on one side of a shank portion and a cylindrical gauge portion having a uniform diameter and extending from one side of the constricted portion, with the shank portion, the constricted portion, and the gauge portion, being formed axially, a wear checking gauge line having a predetermined depth and width formed so as to extend from one end portion of an outer circumferential surface portion of the gauge portion in the direction of the constricted portion.
    Type: Application
    Filed: January 31, 2014
    Publication date: October 9, 2014
    Applicant: NIIGATA SEIKI CO., LTD.
    Inventor: Toshiyuki IGARASHI
  • Publication number: 20140299041
    Abstract: A ring gauge with a maintenance line, which can reliably and quickly let a user know at an early stage the time for replacement during maintenance of a ring gauge, is provided with a ring gauge body which has, on an inner portion, a hole-shaped measuring portion having a circular shape in a planar view and serving as a reference for various types of measuring devices, a predetermined thickness, an upper surface portion, a lower surface portion, and a wear checking gauge line which can have a linear shape formed on an inner diameter portion of the hole-shaped measuring portion.
    Type: Application
    Filed: January 31, 2014
    Publication date: October 9, 2014
    Applicant: Niigata Seiki Co., Ltd.
    Inventor: Toshiyuki IGARASHI
  • Patent number: D710716
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: August 12, 2014
    Assignee: Niigata Seiki Co., Ltd.
    Inventor: Toshiyuki Igarashi
  • Patent number: D711259
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: August 19, 2014
    Assignee: Niigata Seiki Co., Ltd.
    Inventor: Toshiyuki Igarashi
  • Patent number: D711260
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: August 19, 2014
    Assignee: Niigata Seiki Co., Ltd.
    Inventor: Toshiyuki Igarashi
  • Patent number: D711261
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: August 19, 2014
    Assignee: Niigata Seiki Co., Ltd.
    Inventor: Toshiyuki Igarashi