Patents by Inventor Ki Chan Nam

Ki Chan Nam 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).

  • Publication number: 20200398353
    Abstract: A cutting insert of the present invention comprises: an upper surface and a lower surface; first and second lateral surfaces; first and second cutting edge parts; and corner cutting edges, wherein the first cutting edge part includes: a first main cutting edge for forming one end at a portion spaced farthest away from the corner cutting edge; a first sub-cutting edge connected to the corner cutting edge; and a first auxiliary cutting edge for connecting the first main cutting edge and the first sub-cutting edge so as to form a step between the same, and the first sub-cutting edge and the corner cutting edge form one straight line when viewed toward the first lateral surface, and are inclined upward in the direction opposite to the direction toward the lower surface while gradually going in the direction toward the second cutting edge part.
    Type: Application
    Filed: December 6, 2018
    Publication date: December 24, 2020
    Applicant: KORLOY INC.
    Inventors: Min Seok OH, Ki Chan NAM, Byeong Yun LEE, Hyo San KIM, Young Heum KIM
  • Publication number: 20200166241
    Abstract: A hot-water boiler with an incline type firebox is proposed. In the hot-water boiler, a fire tube connector of the firebox is inclined to be deeper from an end of a firebox side to a central portion thereof, thus reducing vortices that may be generated by hot air and flames supplied from a burner.
    Type: Application
    Filed: November 13, 2019
    Publication date: May 28, 2020
    Applicant: KITURAMI CO., LTD.
    Inventors: Gi-Hyun JANG, Yun-Taek JI, Eun-Chan JEONG, Ki-Hwan NAM
  • Patent number: 10357833
    Abstract: The technical objective of the present invention is to provide a cutting insert that can minimize a phenomenon in which the cutting insert is lifted up from a seat surface of a cutting tool while a cutting process is being performed, and can increase an area by which the cutting insert is fastened to the cutting tool.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: July 23, 2019
    Assignee: KORLOY INC.
    Inventors: Min Seok Oh, Ki Chan Nam, Tae Kyun Kim, Nam Seon Lee, Hyo San Kim, Young Heum Kim
  • Patent number: 10343221
    Abstract: A cutting insert and a cutting tool having same. The cutting insert includes: an upper surface; a lower surface having a flat surface; a fastening hole penetrating the upper surface and the lower surface; side surfaces each connecting to the upper surface and the lower surface; and cutting edges formed by the upper surface and the side surfaces. A first cutting edge is inclined downward. A major side surface comprises a first major side surface connected to the upper surface so as to constitute the first cutting edge, and a second major side surface connected to the first major side surface and the lower surface. A minor side surface comprises a first minor side surface connected to the upper surface so as to constitute a second cutting edge, and a third minor side surface connected to the upper surface and the lower surface.
    Type: Grant
    Filed: April 24, 2015
    Date of Patent: July 9, 2019
    Assignee: KORLOY INC.
    Inventors: Ki-Chan Nam, Young-Heum Kim, Hyo-San Kim
  • Patent number: 10279401
    Abstract: Provided are a cutting insert and a tool holder on which the cutting insert is provided. The cutting insert includes a circular upper surface, a circular lower surface, a cylindrical lateral surface for connecting the upper surface and the lower surface, an upper cutting edge formed between the upper surface and the lateral surface, a lower cutting edge formed between the lower surface and the lateral surface, and a plurality of rotation-preventing parts provided at the lateral surface so as to prevent the cutting insert from rotating with respect to the tool holder. Each rotation preventing part includes an inner curved surface recessed toward the center of the lateral surface and convexly rounded so as to form concentric circles in conjunction with the lateral surface, and a stepped rotation-preventing surface parallel to the axial direction of the insert and connecting the inner curved surface and the lateral surface.
    Type: Grant
    Filed: July 21, 2015
    Date of Patent: May 7, 2019
    Assignee: KORLOY INC.
    Inventors: Sang-Yong Lee, Ki-Chan Nam, Nam-Sun Lee, Kane-Hee Lee, Sun-Yong Ahn, Young-Heum Kim
  • Publication number: 20190030628
    Abstract: The technical objective of the present invention is to provide a cutting insert that can minimize a phenomenon in which the cutting insert is lifted up from a seat surface of a cutting tool while a cutting process is being performed, and can increase an area by which the cutting insert is fastened to the cutting tool.
    Type: Application
    Filed: November 29, 2016
    Publication date: January 31, 2019
    Applicant: KORLOY INC.
    Inventors: Min Seok OH, Ki Chan NAM, Tae Kyun KIM, Nam Seon LEE, Hyo San KIM, Young Heum KIM
  • Patent number: 10150170
    Abstract: Provided is an insert for being mounted on a tool holder. The insert includes three substantially right-angled corners along a perimeter, a main cutting edge, a sub cutting edge, and a flat lower surface. A clearance angle of a second end main side surface forms an obtuse angle with respect to a lower surface, and a clearance angle of a second end sub side surface forms an obtuse angle with respect to the lower surface. A clearance angle of a first end main side surface forms a right angle with respect to the lower surface, and a clearance angle of a first end sub side surface forms a right angle with respect to the lower surface.
    Type: Grant
    Filed: April 15, 2015
    Date of Patent: December 11, 2018
    Assignee: KORLOY INC.
    Inventors: Ki-Chan Nam, Kane-Hee Lee, Young-Heum Kim
  • Patent number: 10112241
    Abstract: A technical object of the present disclosure is to provide an insert, which can maintain rigidity thereof regardless of a clearance angle of a clearance surface that forms a circular cutting edge. To this end, the insert according to the present disclosure includes a circular upper surface, a circular lower surface, and a clearance surface portion connecting the upper surface and the lower surface. The clearance surface portion is divided into first and second clearance surfaces along a circumference thereof, by a first wave line that forms a waveform of valleys facing the lower surface and mounts facing the upper surface.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: October 30, 2018
    Assignee: KORLOY INC.
    Inventors: Sang-Yong Lee, Ki-Chan Nam, Nam-Sun Lee, Kane-Hee Lee, Sun-Yong Ahn, Young-Heum Kim
  • Patent number: 10105772
    Abstract: A technical object is to provide an insert capable of preventing escaping of the insert from an assembly of the insert and a tool holder. To this purpose, the insert includes an insert body, and a holder fastening portion provided in the insert body to be fastened to the tool holder, in which the holder fastening portion includes one or more fastening holes formed through the insert body from an upper surface to a lower surface, and one or more locking recesses formed by being recessed in a lower surface periphery of the insert body.
    Type: Grant
    Filed: November 7, 2014
    Date of Patent: October 23, 2018
    Assignee: KORLOY INC.
    Inventors: Sang-Yong Lee, Nam-Sun Lee, Ki-Chan Nam, Kane-Hee Lee, Sun-Yong Ahn
  • Patent number: 10086447
    Abstract: A cutting insert and a cutting tool having same are provided. The cutting insert includes an upper surface, a lower surface having a flat surface, side surfaces connecting to each of the upper surface and the lower surface, and cutting edges being formed by the upper surface and the side surfaces. A first cutting edge among the cutting edges is inclined downward. A major side surface among the side surfaces comprises a first major side surface connected to the upper surface so as to constitute the first cutting edge, and a second major side surface connected to the first major side surface and the lower surface. The first major side surface has a reversely positive surface, and the second major side surface has a reversely positive surface or a negative surface, and a minor side surface among the side surfaces has a positive surface or a negative surface.
    Type: Grant
    Filed: April 29, 2015
    Date of Patent: October 2, 2018
    Assignee: KORLOY INC.
    Inventors: Ki-Chan Nam, Young-Heum Kim, Kane-Hee Lee, Hyo-San Kim
  • Publication number: 20180200808
    Abstract: The technical objective of the present invention is to provide a cutting insert that has an improved fastening property with a cutting tool, thereby preventing reduction of the service life. To this end, the cutting insert according to the present invention has three corners along the circumference thereof; an upper main cutting edge, which is formed on the edge between the upper surface and the first side surface, and an upper sub cutting edge, which is formed on the edge between the upper surface and the second side surface, are continuously disposed between respective corners; the lower surface has the same shape as that of the upper surface; and the angle defined between the upper main cutting edge and the upper sub cutting edge, which are placed on both sides with reference to each corner, is larger than or equal to 85° and is smaller than 90°.
    Type: Application
    Filed: May 27, 2016
    Publication date: July 19, 2018
    Applicant: KORLOY INC.
    Inventors: Nam-seon LEE, Ki-chan NAM, Kane-hee LEE, Hyo-san KIM, Young-heum KIM
  • Publication number: 20170259356
    Abstract: Provided are a cutting insert and a tool holder on which the cutting insert is provided. The cutting insert includes a circular upper surface, a circular lower surface, a cylindrical lateral surface for connecting the upper surface and the lower surface, an upper cutting edge formed between the upper surface and the lateral surface, a lower cutting edge formed between the lower surface and the lateral surface, and a plurality of rotation-preventing parts provided at the lateral surface so as to prevent the cutting insert from rotating with respect to the tool holder. Each rotation preventing part includes an inner curved surface recessed toward the center of the lateral surface and convexly rounded so as to form concentric circles in conjunction with the lateral surface, and a stepped rotation-preventing surface parallel to the axial direction of the insert and connecting the inner curved surface and the lateral surface.
    Type: Application
    Filed: July 21, 2015
    Publication date: September 14, 2017
    Applicant: KORLOY INC.
    Inventors: Sang-Yong LEE, Ki-Chan NAM, Nam-Sun LEE, Kane-Hee LEE, Sun-Yong AHN, Young-Heum KIM
  • Patent number: D804552
    Type: Grant
    Filed: February 17, 2016
    Date of Patent: December 5, 2017
    Inventors: Nam Seon Lee, Ki Chan Nam, Kwan Hee Lee, Hyo San Kim, Young Heum Kim
  • Patent number: D805564
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: December 19, 2017
    Inventors: Nam Seon Lee, Ki Chan Nam, Kwan Hee Lee, Hyo San Kim, Young Heum Kim
  • Patent number: D805566
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: December 19, 2017
    Inventors: Min Seok Oh, Ki Chan Nam, Tae Kyun Kim, Nam Seon Lee, Hyo San Kim, Young Heum Kim
  • Patent number: D816744
    Type: Grant
    Filed: June 17, 2016
    Date of Patent: May 1, 2018
    Inventors: Nam Seon Lee, Ki Chan Nam, Young Heum Kim, Hyo San Kim, Min Seok Oh, Hyoung Ju Jung
  • Patent number: D822078
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: July 3, 2018
    Inventors: Min Seok Oh, Ki Chan Nam, Hyo San Kim, Young Heum Kim
  • Patent number: D822079
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: July 3, 2018
    Inventors: Nam Seon Lee, Hyo San Kim, Ki Chan Nam, Young Heum Kim
  • Patent number: D822080
    Type: Grant
    Filed: March 15, 2017
    Date of Patent: July 3, 2018
    Inventors: Min Seok Oh, Ki Chan Nam, Hyo San Kim, Young Heum Kim
  • Patent number: D898085
    Type: Grant
    Filed: June 24, 2019
    Date of Patent: October 6, 2020
    Assignee: KORLOY INC.
    Inventors: Tae Kyun Kim, Hyo San Kim, Young Heum Kim, Ki Chan Nam