Patents by Inventor Noriyoshi Takaoka

Noriyoshi Takaoka 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).

  • Quenching depth measurement method and quenching depth measurement apparatus
    Patent number: 9304108
    Abstract: A quenching depth measuring method is used for measuring the quenching depth in a workpiece and includes the steps of: magnetizing the workpiece by disposing, in the vicinity of the workpiece, a magnetizer equipped with an exciting coil; detecting, through a detection coil, an induced magnetic field generated by the magnetization; measuring the induced magnetic field as the output voltage of the detection coil; and specifying the thickness of the quenched hardened layer of the workpiece on the basis of known electromagnetic characteristic information of an unquenched material and a fully-quenched material and an output voltage value measured by the detection coil, the unquenched material being made of the same material as the constituent material of the workpiece and being a material on which a quenching process is not performed, the fully-quenched material being a material on which the quenching process is performed.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: April 5, 2016
    Assignees: NETUREN CO., LTD., NATIONAL UNIVERSITY CORPORATION OITA UNIVERSITY
    Inventors: Yuji Gotoh, Noriyoshi Takaoka, Kazuhiro Kawasaki, Yoshitaka Misaka
  • QUENCHING DEPTH MEASUREMENT METHOD AND QUENCHING DEPTH MEASUREMENT APPARATUS
    Publication number: 20130300405
    Abstract: A quenching depth measuring method is used for measuring the quenching depth in a workpiece and includes the steps of: magnetizing the workpiece by disposing, in the vicinity of the workpiece, a magnetizer equipped with an exciting coil; detecting, through a detection coil, an induced magnetic field generated by the magnetization; measuring the induced magnetic field as the output voltage of the detection coil; and specifying the thickness of the quenched hardened layer of the workpiece on the basis of known electromagnetic characteristic information of an unquenched material and a fully-quenched material and an output voltage value measured by the detection coil, the unquenched material being made of the same material as the constituent material of the workpiece and being a material on which a quenching process is not performed, the fully-quenched material being a material on which the quenching process is performed.
    Type: Application
    Filed: October 26, 2011
    Publication date: November 14, 2013
    Applicant: NETUREN CO., LTD.
    Inventors: Yuji Gotoh, Noriyoshi Takaoka, Kazuhiro Kawasaki, Yoshitaka Misaka