Patents by Inventor Yoshimasa Nishio

Yoshimasa Nishio 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).

  • Powder magnetic core, and coil component
    Patent number: 11011305
    Abstract: A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe—Cr—Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder.
    Type: Grant
    Filed: May 24, 2018
    Date of Patent: May 18, 2021
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshimasa Nishio, Shin Noguchi, Kazunori Nishimura, Tetsuroh Katoh, Toshio Mihara
  • POWDER MAGNETIC CORE, AND COIL COMPONENT
    Publication number: 20180268994
    Abstract: A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe—Cr—Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder.
    Type: Application
    Filed: May 24, 2018
    Publication date: September 20, 2018
    Applicant: HITACHI METALS, LTD.
    Inventors: Yoshimasa NISHIO, Shin NOGUCHI, Kazunori NISHIMURA, Tetsuroh KATOH, Toshio MIHARA
  • Method for manufacturing powder magnetic core, powder magnetic core, and coil component
    Patent number: 10008324
    Abstract: A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe—Cr—Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder.
    Type: Grant
    Filed: January 14, 2014
    Date of Patent: June 26, 2018
    Assignee: HITACHI METALS, LTD.
    Inventors: Yoshimasa Nishio, Shin Noguchi, Kazunori Nishimura, Tetsuroh Katoh, Toshio Mihara
  • METHOD FOR MANUFACTURING POWDER MAGNETIC CORE, POWDER MAGNETIC CORE, AND COIL COMPONENT
    Publication number: 20150332850
    Abstract: A method for manufacturing a powder magnetic core using a soft magnetic material powder, wherein the method has: a first step of mixing the soft magnetic material powder with a binder, a second step of subjecting a mixture obtained through the first step to pressure forming, and a third step of subjecting a formed body obtained through the second step to heat treatment. The soft magnetic material powder is an Fe—Cr—Al based alloy powder comprising Fe, Cr and Al. An oxide layer is formed on a surface of the soft magnetic material powder by the heat treatment. The oxide layer has a higher ratio by mass of Al to the sum of Fe, Cr and Al than an alloy phase inside the powder.
    Type: Application
    Filed: January 14, 2014
    Publication date: November 19, 2015
    Applicant: HITACHI METALS LTD.
    Inventors: Yoshimasa Nishio, Shin Noguchi, Kazunori Nishimura, Tetsuroh Katoh, Toshio Mihara