Patents by Inventor Jong Kwon CHUNG

Jong Kwon CHUNG 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).

  • High-strength flake graphite cast iron, manufacturing method thereof, and engine body for internal combustion engine including cast iron
    Patent number: 9719157
    Abstract: The present disclosure relates to a manufacturing method of high-strength flake graphite cast iron, the high-strength flake graphite cast iron manufactured by the method, and an engine body including the cast iron, and more particularly, to flake graphite cast iron and a manufacturing method thereof, wherein the flake graphite cast iron has a uniform graphite shape and low probability of forming chill and has high tensile strength of at least 350 MPa and excellent workability and fluidity by controlling the content of manganese (Mn) and a trace of strontium (Sr), which are included in the cast iron, within a specific ratio.
    Type: Grant
    Filed: January 6, 2014
    Date of Patent: August 1, 2017
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: Ki Hwan Jung, Sik Yang, Jae Hyoung Hwang, Young Kyu Ju, Jong Kwon Chung, Yeniseul Lee, Dong Seob Shim
  • High strength flake graphite cast iron having excellent workability and preparation method thereof
    Patent number: 9689059
    Abstract: The present disclosure relates to flake graphite cast iron having high workability and a preparation method thereof, and more particularly, to flake graphite cast iron with a uniform graphite shape, low chill formability, a high strength such as a tensile strength of 350 MPa or more, and excellent workability and fluidity by controlling each of the contents of manganese (Mn) and sulfur (S) and carbon (C) and silicon (Si) included in the cast iron and a carbon equivalent (CE) to predetermined ratios, and a preparation method thereof.
    Type: Grant
    Filed: March 20, 2014
    Date of Patent: June 27, 2017
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: Jong Kwon Chung, Sik Yang, Ki Hwan Jung, Jae Hyoung Hwang
  • HIGH-STRENGTH FLAKE GRAPHITE CAST IRON, MANUFACTURING METHOD THEREOF, AND ENGINE BODY FOR INTERNAL COMBUSTION ENGINE INCLUDING CAST IRON
    Publication number: 20150368763
    Abstract: The present disclosure relates to a manufacturing method of high-strength flake graphite cast iron, the high-strength flake graphite cast iron manufactured by the method, and an engine body including the cast iron, and more particularly, to flake graphite cast iron and a manufacturing method thereof, wherein the flake graphite cast iron has a uniform graphite shape and low probability of forming chill and has high tensile strength of at least 350 MPa and excellent workability and fluidity by controlling the content of manganese (Mn) and a trace of strontium (Sr), which are included in the cast iron, within a specific ratio.
    Type: Application
    Filed: January 6, 2014
    Publication date: December 24, 2015
    Inventors: Ki Hwan JUNG, Sik YANG, Jae Hyoung HWANG, Young Kyu JU, Jong Kwon CHUNG, Yeniseul LEE, Dong Seob SHIM
  • HIGH STRENGTH FLAKE GRAPHITE CAST IRON HAVING EXCELLENT WORKABILITY AND PREPARATION METHOD THEREOF
    Publication number: 20140286819
    Abstract: The present disclosure relates to flake graphite cast iron having high workability and a preparation method thereof, and more particularly, to flake graphite cast iron with a uniform graphite shape, low chill formability, a high strength such as a tensile strength of 350 MPa or more, and excellent workability and fluidity by controlling each of the contents of manganese (Mn) and sulfur (S) and carbon (C) and silicon (Si) included in the cast iron and a carbon equivalent (CE) to predetermined ratios, and a preparation method thereof.
    Type: Application
    Filed: March 20, 2014
    Publication date: September 25, 2014
    Applicant: DOOSAN INFRACORE CO., LTD.
    Inventors: Jong Kwon CHUNG, Sik YANG, Ki Hwan JUNG, Jae Hyoung HWANG