Patents by Inventor Katsumasa YAMASAKI

Katsumasa YAMASAKI 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).

  • Tapered ferrite core, its production method and apparatus, and inductance device comprising it
    Patent number: 11670450
    Abstract: A tapered ferrite core having a solid or hollow cylindrical shape with larger length than outer diameter, and comprising a ground taper portion in at least one end portion, the taper portion having ground streaks extending in the longitudinal direction of the ferrite core, can be formed by centerless-grinding a rotating ferrite core by a rotating grinder.
    Type: Grant
    Filed: June 5, 2018
    Date of Patent: June 6, 2023
    Assignee: PROTERIAL, LTD.
    Inventors: Akihiro Maeta, Katsumasa Yamasaki
  • Edge processing device for molded powder compact and edge processing method for molded powder compact
    Patent number: 10766118
    Abstract: An edge processing device includes: conveying means that convey a molded powder compact, a first rotating tool disposed on one side and a second rotating tool disposed on the other side and rotating in a direction identical to a direction the first rotating tool rotates. The first rotating tool contacts from an upstream side with a first corner portion between one side surface of a processing target portion of the molded powder compact and a rear surface of the processing target portion. The second rotating tool contacts from a downstream side with a second corner portion between the other side surface of the processing target portion and a front surface of the processing target portion. The second rotating tool faces the first rotating tool with the conveying path therebetween, and is positionally displaced to the downstream side with respect to the first rotating tool.
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: September 8, 2020
    Assignee: HITACHI METALS, LTD.
    Inventors: Shinichi Nakata, Kazunori Nishimura, Katsumasa Yamasaki
  • TAPERED FERRITE CORE, ITS PRODUCTION METHOD AND APPARATUS, AND INDUCTANCE DEVICE COMPRISING IT
    Publication number: 20200135393
    Abstract: A tapered ferrite core having a solid or hollow cylindrical shape with larger length than outer diameter, and comprising a ground taper portion in at least one end portion, the taper portion having ground streaks extending in the longitudinal direction of the ferrite core, can be formed by centerless-grinding a rotating ferrite core by a rotating grinder.
    Type: Application
    Filed: June 5, 2018
    Publication date: April 30, 2020
    Applicant: HITACHI METALS, LTD.
    Inventors: Akihiro MAETA, Katsumasa YAMASAKI
  • EDGE PROCESSING DEVICE FOR MOLDED POWDER COMPACT AND EDGE PROCESSING METHOD FOR MOLDED POWDER COMPACT
    Publication number: 20180311786
    Abstract: An edge processing device includes:conveying means that convey a molded powder compact, a first rotating tool disposed on one side and a second rotating tool disposed on the other side and rotating in a direction identical to a direction the first rotating tool rotates. The first rotating tool contacts from an upstream side with a first corner portion between one side surface of a processing target portion of the molded powder compact and a rear surface of the processing target portion. The second rotating tool contacts from a downstream side with a second corner portion between the other side surface of the processing target portion and a front surface of the processing target portion. The second rotating tool faces the first rotating tool with the conveying path therebetween, and is positionally displaced to the downstream side with respect to the first rotating tool.
    Type: Application
    Filed: September 28, 2016
    Publication date: November 1, 2018
    Applicant: Hitachi Metals, Ltd.
    Inventors: Shinichi NAKATA, Kazunori NISHIMURA, Katsumasa YAMASAKI