Patents by Inventor Tatsuo TAKADA

Tatsuo TAKADA 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).

  • Evaluation method for insulation performance of insulator
    Patent number: 10677835
    Abstract: An evaluation method for insulation performance includes: a step ? of applying a DC voltage to a first insulator and measuring an integration value of a current flowing through the first insulator from a start of application of the DC voltage after a prescribed time period; a step ? of applying a DC voltage to the second insulator on an applying condition that is identical to that in the step ? and measuring an integration value of a current flowing through the second insulator from a start of application of the DC voltage after a prescribed time period; and a step ? of comparing (i) a first graph obtained in the step ? and (ii) a second graph obtained in the step ?, to evaluate a difference between insulation performances of the insulators.
    Type: Grant
    Filed: March 2, 2017
    Date of Patent: June 9, 2020
    Assignee: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoitsu Sekiguchi, Tatsuo Takada, Yasuhiro Tanaka, Masumi Fukuma
  • EVALUATION METHOD FOR INSULATION PERFORMANCE OF INSULATOR
    Publication number: 20190120893
    Abstract: An evaluation method for insulation performance includes: a step ? of applying a DC voltage to a first insulator and measuring an integration value of a current flowing through the first insulator from a start of application of the DC voltage after a prescribed time period; a step ? of applying a DC voltage to the second insulator on an applying condition that is identical to that in the step ? and measuring an integration value of a current flowing through the second insulator from a start of application of the DC voltage after a prescribed time period; and a step ? of comparing (i) a first graph obtained in the step ? and (ii) a second graph obtained in the step ?, to evaluate a difference between insulation performances of the insulators.
    Type: Application
    Filed: March 2, 2017
    Publication date: April 25, 2019
    Applicant: SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Yoitsu SEKIGUCHI, Tatsuo TAKADA, Yasuhiro TANAKA, Masumi FUKUMA