Patents by Inventor Riichiro MATOBA

Riichiro MATOBA 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).

  • Intermediary race member of rolling bearing, race, rolling bearing and production method therefor
    Patent number: 11078961
    Abstract: A method for manufacturing a bearing ring of a rolling bearing includes a series of steps of cutting out an annular member from a material, forming a surface-hardened layer on the annular member, quenching and tempering the annular member, and polishing inner and outer diameter surfaces of the annular member. The method includes, after the quenching, rapidly cooling the ring member such that the ring member has a surface temperature of 50° C. or lower to form a bearing ring intermediate member, and after the tempering, polishing inner and outer diameter surfaces of the bearing ring intermediate member.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: August 3, 2021
    Assignee: NSK LTD.
    Inventors: Hideyuki Hidaka, Riichiro Matoba, Yuji Miyamoto
  • INTERMEDIARY RACE MEMBER OF ROLLING BEARING, RACE, ROLLING BEARING AND PRODUCTION METHOD THEREFOR
    Publication number: 20200408262
    Abstract: A method for manufacturing a bearing ring of a rolling bearing includes a series of steps of cutting out an annular member from a material, forming a surface-hardened layer on the annular member, quenching and tempering the annular member, and polishing inner and outer diameter surfaces of the annular member. The method includes, after the quenching, rapidly cooling the ring member such that the ring member has a surface temperature of 50° C. or lower to form a bearing ring intermediate member, and after the tempering, polishing inner and outer diameter surfaces of the bearing ring intermediate member.
    Type: Application
    Filed: June 15, 2018
    Publication date: December 31, 2020
    Applicant: NSK LTD.
    Inventors: Hideyuki HIDAKA, Riichiro MATOBA, Yuji MIYAMOTO