Patents by Inventor Kee-Jeong Cheong

Kee-Jeong Cheong 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).

  • Diamond tools with multilayers of abrasive grain and method for manufacturing the same
    Patent number: 8100997
    Abstract: The present invention relates to a diamond tool and a method of manufacturing the same, wherein multiple abrasive layers are formed through a brazing or electroplating method, thereby improving the performance and service life of the tool. According to the method of the present invention, a plurality of concave portions are formed in a surface of the shank. A bonding paste is coated into the concave portions and abrasives are dispersed in the bonding paste to thereby form a lower abrasive layer. Again, a bonding material is coated on the lower abrasive layer and abrasives are dispersed in the bonding material to thereby form an upper abrasive layer. Then, a heat treatment is executed to fusion-bond the bonding material and abrasives onto the surface of the shank.
    Type: Grant
    Filed: February 4, 2005
    Date of Patent: January 24, 2012
    Assignee: Shinhan Diamond Industrial Co., Ltd.
    Inventors: Min-Seok Song, Mun-Seok Park, Sug-Goo Kim, Sun-Jai Lee, Kang-Jun Kim, Kee-Jeong Cheong, Won-Ho Jee, Shin-Kyung Kim
  • Diamond tools with multilayers of abrasive grain and method for manufacturing the same
    Publication number: 20070151554
    Abstract: The present invention relates to a diamond tool and a method of manufacturing the same, wherein multiple abrasive layers are formed through a brazing or electroplating method, thereby improving the performance and service life of the tool. According to the method of the present invention, a plurality of concave portions are formed in a surface of the shank. A bonding paste is coated into the concave portions and abrasives are dispersed in the bonding paste to thereby form a lower abrasive layer. Again, a bonding material is coated on the lower abrasive layer and abrasives are dispersed in the bonding material to thereby form an upper abrasive layer. Then, a heat treatment is executed to fusion-bond the bonding material and abrasives onto the surface of the shank.
    Type: Application
    Filed: February 4, 2005
    Publication date: July 5, 2007
    Applicant: SHINHAN DIAMOND INDUSTRIAL CO., LTD.
    Inventors: Min-Seok Song, Mun-Seok Park, Sug-Goo Kim, Sun-Jai Lee, Kang-Jun Kim, Kee-Jeong Cheong, Won-Ho Jee, Shin-Kyung Kim