Patents by Inventor Yoshitsugu Iijima

Yoshitsugu Iijima 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).

  • Patent number: 10843247
    Abstract: A material-property-value estimating method of estimating a material-property-value of a target steel-strip product manufactured via at least one of a reheating process, a rolling process, and a cooling process, which are performed while a target material is being conveyed along a conveyance route, the material-property-value estimating method includes an estimating step of estimating a material-property-value of each of meshes dividing the target steel-strip product based on a measured value that has been measured once or more by a measuring device installed on the conveyance route, the measured value including at least a temperature of the target material; and a chemical composition per component of the target steel-strip product.
    Type: Grant
    Filed: October 10, 2014
    Date of Patent: November 24, 2020
    Assignee: JFE Steel Corporation
    Inventors: Shuji Kuyama, Kazuya Asano, Yoshitsugu Iijima, Tomoyoshi Ogasahara
  • Patent number: 9833822
    Abstract: Provided are a cooling method and a cooling apparatus that, in the cooling of a hot-rolled steel strip, regulates the amount of cooling water in a two-stage manner for each set of headers in the width direction and changes the rate at which the steel strip is cooled, in a multistage manner by a simple method, and that is effective particularly in cooling the lower surface of the steel strip, where space is narrow. The spray nozzles 5 are arranged in a row in the width direction of the steel strip at a predetermined pitch. Two systems of cooling headers 6 are arranged for one set so that spray nozzles 5 adjacent in the width direction can be supplied with cooling water from different pipe systems, and a spray valve 7 is attached to each cooling header 7 so that spraying/stop of spraying of cooling water can be individually performed.
    Type: Grant
    Filed: November 27, 2013
    Date of Patent: December 5, 2017
    Assignee: JFE Steel Corporation
    Inventors: Satoshi Ueoka, Takeshi Chiba, Kazuya Ibuki, Yoshitsugu Iijima
  • Patent number: 9616485
    Abstract: Provided is a metal strip for a pipe with which the weight of a pipe can be reduced while maintaining the strength of a joint portion that tends to be structurally the weakest. A metal strip L is formed by rolling. The thickness of each of a head end portion 1a and a tail end portion 1b, which are longitudinal end portions 1, is greater than the thickness of an intermediate portion excluding the longitudinal end portions 1. The metal strips are connected to each other in series by welding, and a pipe is made by performing a pipe-forming operation.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: April 11, 2017
    Assignee: JFE STEEL CORPORATION
    Inventors: Takahiko Ogura, Hiroshi Shigeta, Yoshimitsu Fukui, Yoshitsugu Iijima, Kei Mikami, Yasuhiro Matsuki
  • Publication number: 20150328675
    Abstract: Provided is a metal strip for a pipe with which the weight of a pipe can be reduced while maintaining the strength of a joint portion that tends to be structurally the weakest. A metal strip L is formed by rolling. The thickness of each of a head end portion 1a and a tail end portion 1b, which are longitudinal end portions 1, is greater than the thickness of an intermediate portion excluding the longitudinal end portions 1. The metal strips are connected to each other in series by welding, and a pipe is made by performing a pipe-forming operation.
    Type: Application
    Filed: December 20, 2012
    Publication date: November 19, 2015
    Applicant: JFE STEEL CORPORATION
    Inventors: Takahiko OGURA, Hiroshi SHIGETA, Yoshimitsu FUKUI, Yoshitsugu IIJIMA, Kei MIKAMI, Yasuhiro MATSUKI
  • Publication number: 20150321234
    Abstract: Provided are a cooling method and a cooling apparatus that, in the cooling of a hot-rolled steel strip, regulates the amount of cooling water in a two-stage manner for each set of headers in the width direction and changes the rate at which the steel strip is cooled, in a multistage manner by a simple method, and that is effective particularly in cooling the lower surface of the steel strip, where space is narrow. The spray nozzles 5 are arranged in a row in the width direction of the steel strip at a predetermined pitch. Two systems of cooling headers 6 are arranged for one set so that spray nozzles 5 adjacent in the width direction can be supplied with cooling water from different pipe systems, and a spray valve 7 is attached to each cooling header 7 so that spraying/stop of spraying of cooling water can be individually performed.
    Type: Application
    Filed: November 27, 2013
    Publication date: November 12, 2015
    Applicant: JET STEEL CORPORATION
    Inventors: Satoshi Ueoka, Takeshi Chiba, Kazuya Ibuki, Yoshitsugu Iijima
  • Patent number: 7857919
    Abstract: The present invention provides a method of manufacturing a steel product, comprising the step of heat treating a steel product having been subjected to quenching or accelerated cooling on a hot rolling line after hot rolling to pass the steel product through a plurality of induction heating apparatuses, which are installed on the hot rolling line, three times or more. The method of the present invention makes it possible to uniformly heat treat the steel product with high productivity.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: December 28, 2010
    Assignee: JFE Steel Corporation
    Inventors: Yoshitsugu Iijima, Hiroshi Mizuno, Hiroshi Sekine, Noritsugu Suzuki, Masatoshi Sugioka
  • Publication number: 20050252587
    Abstract: The present invention provides a method of manufacturing a steel product, comprising the step of heat treating a steel product having been subjected to quenching or accelerated cooling on a hot rolling line after hot rolling to pass the steel product through a plurality of induction heating apparatuses, which are installed on the hot rolling line, three times or more. The method of the present invention makes it possible to uniformly heat treat the steel product with high productivity.
    Type: Application
    Filed: August 5, 2003
    Publication date: November 17, 2005
    Inventors: Yoshitsugu Iijima, Hiroshi Mizuno, Hiroshi Sekine, Noritsugu Suzuki, Masatoshi Sugioka
  • Patent number: 6891139
    Abstract: A heat treatment apparatus includes a plurality of induction heating devices which heat a steel product, a correctional device which corrects the steel product, a computing device which computes supply predetermined electric power which is supplied to the induction heating device, on the basis of a size of the steel product, a conveying speed of the steel product, a heating target temperature of the steel product, and a predetermined temperature of the steel product at the previous stage of the induction heating devices, and a power supply unit which supplies the supply predetermined electric power computed by the computing device to the induction heating devices, and the computing device which computes electric power for uniform heating processing on the steel product or electric power for surface layer heating processing on the steel product.
    Type: Grant
    Filed: February 25, 2004
    Date of Patent: May 10, 2005
    Assignee: JFE Steel Corporation
    Inventors: Yoshitsugu Iijima, Hiroshi Mizuno, Hiroshi Sekine, Noritsugu Suzuki, Kiyoshi Nakano, Masatoshi Sugioka
  • Publication number: 20040164071
    Abstract: A heat treatment apparatus includes a plurality of induction heating devices which heat a steel product, a correctional device which corrects the steel product, a computing device which computes supply predetermined electric power which is supplied to the induction heating device, on the basis of a size of the steel product, a conveying speed of the steel product, a heating target temperature of the steel product, and a predetermined temperature of the steel product at the previous stage of the induction heating devices, and a power supply unit which supplies the supply predetermined electric power computed by the computing device to the induction heating devices, and the computing device which computes electric power for uniform heating processing on the steel product or electric power for surface layer heating processing on the steel product.
    Type: Application
    Filed: February 25, 2004
    Publication date: August 26, 2004
    Applicant: JFE Steel Corporation
    Inventors: Yoshitsugu Iijima, Hiroshi Mizuno, Hiroshi Sekine, Noritsugu Suzuki, Kiyoshi Nakano, Masatoshi Sugioka
  • Patent number: 4479944
    Abstract: Compositions which contain a PGI.sub.2 analogue in solution in a solvent consisting of at least one pharmacologically-acceptable alcohol, polar aprotic solvent or middle chain triglyceride, or which are cyclodextrin clathrates of a PGI.sub.2 analogue stabilise the PGI.sub.2 analogues against decomposition. They are useful in the treatment of arteriosclerosis, cardiac failure or thrombosis.
    Type: Grant
    Filed: May 2, 1978
    Date of Patent: October 30, 1984
    Assignee: Ono Pharmaceutical Co., Ltd.
    Inventors: Masaki Hayashi, Katsuhiko Shuto, Yoshitsugu Iijima