Patents by Inventor Satoshi Kureishi

Satoshi Kureishi 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).

  • Eddy current testing method, steel pipe or tube tested by the eddy current testing method, and eddy current testing apparatus for carrying out the eddy current testing method
    Patent number: 8269488
    Abstract: It is an object of the present invention to provide an eddy current testing method capable of securely detecting a high hardness part locally occurring in a metal material having magnetism, and capable of securely checking whether the high hardness part has been removed after execution of a repairing treatment for removing the high hardness part. In the eddy current testing method according to the present invention, a frequency of the AC current for energizing the differential coil 1 is set so that a phase difference between a magnetism variation signal of the metal material P and a liftoff signal detected by the differential coil is equal to or larger than 135°, and a local high hardness part occurring in the metal material is detected based on an amplitude and a phase of a detection signal outputted from the differential coil.
    Type: Grant
    Filed: March 11, 2008
    Date of Patent: September 18, 2012
    Assignee: Sumitomo Metal Industries, Ltd.
    Inventors: Shigetoshi Hyodo, Satoshi Kureishi
  • Eddy Current Testing Method, Steel Pipe or Tube Tested by the Eddy Current Testing Method, and Eddy Current Testing Apparatus for Carrying out the Eddy Current Testing Method
    Publication number: 20100134099
    Abstract: It is an object of the present invention to provide an eddy current testing method capable of securely detecting a high hardness part locally occurring in a metal material having magnetism, and capable of securely checking whether the high hardness part has been removed after execution of a repairing treatment for removing the high hardness part. In the eddy current testing method according to the present invention, a frequency of the AC current for energizing the differential coil 1 is set so that a phase difference between a magnetism variation signal of the metal material P and a liftoff signal detected by the differential coil is equal to or larger than 135°, and a local high hardness part occurring in the metal material is detected based on an amplitude and a phase of a detection signal outputted from the differential coil.
    Type: Application
    Filed: March 11, 2008
    Publication date: June 3, 2010
    Applicant: SUMITOMO METAL INDUSTRIES, LTD.
    Inventors: Shigetoshi Hyodo, Satoshi Kureishi