Patents by Inventor Kazumi Kurayoshi

Kazumi Kurayoshi 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).

  • Method of demolishing furnace of multilayered-refractory structure
    Patent number: 8578582
    Abstract: A method for dismantling a furnace having a multilayered refractory structure including: a furnace shell; a containing layer that is formed of a containing refractory that contains asbestos, and covers the inner side of the furnace shell; and a multilayered non-containing layer that is formed of a non-containing refractory that contains no asbestos, and covers the inner side of the containing layer, the method includes: a primary dismantling process; and a secondary dismantling process conducted after the primary dismantling process. In the primary dismantling process, the non-containing layer is dismantled from a furnace-core side thereof but the containing layer and at least one layer of the layers forming the non-containing layer, which is in contact with the containing layer, are left as a remnant. In the secondary dismantling process, the remnant is dismantled while asbestos measures are implemented.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: November 12, 2013
    Assignee: Nippon Steel Engineering Co., Ltd.
    Inventors: Kazumi Kurayoshi, Ryo Kato, Katsumi Mori, Yoshihito Doi
  • METHOD OF DEMOLISHING FURNACE OF MULTILAYERED-REFRACTORY STRUCTURE
    Publication number: 20120144644
    Abstract: A method for dismantling a furnace having a multilayered refractory structure including: a furnace shell; a containing layer that is formed of a containing refractory that contains asbestos, and covers the inner side of the furnace shell; and a multilayered non-containing layer that is formed of a non-containing refractory that contains no asbestos, and covers the inner side of the containing layer, the method includes: a primary dismantling process; and a secondary dismantling process conducted after the primary dismantling process. In the primary dismantling process, the non-containing layer is dismantled from a furnace-core side thereof but the containing layer and at least one layer of the layers forming the non-containing layer, which is in contact with the containing layer, are left as a remnant. In the secondary dismantling process, the remnant is dismantled while asbestos measures are implemented.
    Type: Application
    Filed: June 25, 2010
    Publication date: June 14, 2012
    Applicant: NIPPON STEEL ENGINEERING CO., LTD.
    Inventors: Kazumi Kurayoshi, Ryo Kato, Katsumi Mori, Yoshihito Doi