Patents by Inventor Keun Chul Song

Keun Chul Song 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: 12084843
    Abstract: Proposed is a combined structure, and the combined structure includes a coupling target object having a coupling space that comprises a first space and a second space communicating with each other, a damper structure accommodated in the first space and including a flexible portion having a hollow therein and a hard portion coupled to the flexible portion and having one surface exposed to an outside, and a coupling unit accommodated in the second space, a portion of which is in contact with one surface of the hard portion. The hollow is closed from the outside in the damper structure. In response to rotation of the coupling unit in the second space, another portion different from the portion of the coupling unit comes into contact with the hard portion.
    Type: Grant
    Filed: August 6, 2021
    Date of Patent: September 10, 2024
    Assignee: SUNGBO INDUSTRIAL CO., LTD.
    Inventors: Keun Chul Song, Dae Hyun Ryu, Hyun Soo Lee
  • Publication number: 20240076857
    Abstract: A fastening device for different components is proposed. The device may include a first member having a through passage formed at a connecting end, and a second member including an insertion groove, into which a connecting end of a first member is introduced, and an inlet hole and an outlet hole, which are formed on the opposite side of the insertion groove to communicate with each other through the through passage. The device may also include a connector for fastening or releasing according to a rotational operation position while being inserted to reach the inlet hole, the through passage, and the outlet hole; and a damper positioned on one side of the connector and configured as a single elastic pressing body that prevents rotation of the connector and maintains a fixed state of the connector by contracting or restoring its original shape according to a rotational operation of the connector.
    Type: Application
    Filed: August 29, 2023
    Publication date: March 7, 2024
    Inventors: Keun Chul SONG, Hyun Soo LEE, Min Gyun JIN, Jong Gwi SONG
  • Patent number: 11697924
    Abstract: Disclosed is a damper structure in contact with a connection unit for coupling a first coupling structure part and a second coupling structure part, including a damper part formed of an elastic material and at least one fixing part coupled to at least one surface of the damper part and protruding outward, and coming into contact with the connection unit and moving toward the damper part by pressure applied by the connection unit when the connection unit is separated or fastened.
    Type: Grant
    Filed: November 19, 2019
    Date of Patent: July 11, 2023
    Assignee: SUNGBO INDUSTRIAL CO., LTD.
    Inventor: Keun Chul Song
  • Publication number: 20220412058
    Abstract: Disclosed is a damper structure in contact with a connection unit for coupling a first coupling structure part and a second coupling structure part, including a damper part formed of an elastic material and at least one fixing part coupled to at least one surface of the damper part and protruding outward, and coming into contact with the connection unit and moving toward the damper part by pressure applied by the connection unit when the connection unit is separated or fastened.
    Type: Application
    Filed: August 30, 2022
    Publication date: December 29, 2022
    Applicant: SUNGBO INDUSTRIAL CO., LTD.
    Inventor: Keun Chul SONG
  • Publication number: 20220074172
    Abstract: Proposed is a combined structure, and the combined structure includes a coupling target object having a coupling space that comprises a first space and a second space communicating with each other, a damper structure accommodated in the first space and including a flexible portion having a hollow therein and a hard portion coupled to the flexible portion and having one surface exposed to an outside, and a coupling unit accommodated in the second space, a portion of which is in contact with one surface of the hard portion. The hollow is closed from the outside in the damper structure. In response to rotation of the coupling unit in the second space, another portion different from the portion of the coupling unit comes into contact with the hard portion.
    Type: Application
    Filed: August 6, 2021
    Publication date: March 10, 2022
    Inventors: Keun Chul SONG, Dae Hyun RYU, Hyun Soo LEE
  • Patent number: 10954656
    Abstract: A tooth for a bucket of an excavator includes a point body having a hollow insertion recess and having a pair of coupling holes provided at positions facing each other on the opposite sides, and a pair of connection units respectively inserted into the pair of coupling holes and having a unit body and a protrusion protruding from the unit body, wherein the point body includes: a guide portion positioned in each of the coupling holes and guiding a rotational operation of the protrusion, a fixing portion fixing a position of each of the inserted connection unit, a buffer portion positioned between the fixing portion and an inner surface of the point body and surrounding the fixing portion, and a support where the fixing portion and the buffer portion are positioned.
    Type: Grant
    Filed: October 11, 2018
    Date of Patent: March 23, 2021
    Assignee: SUNGBO INDUSTRIAL CO., LTD.
    Inventors: Keun Chul Song, Dae Hyun Ryu, Chang Woo Lim, Hwa Yong Shin, Ryun Han Lee
  • Publication number: 20210017740
    Abstract: Disclosed is a damper structure in contact with a connection unit for coupling a first coupling structure part and a second coupling structure part, including a damper part formed of an elastic material and at least one fixing part coupled to at least one surface of the damper part and protruding outward, and coming into contact with the connection unit and moving toward the damper part by pressure applied by the connection unit when the connection unit is separated or fastened.
    Type: Application
    Filed: November 19, 2019
    Publication date: January 21, 2021
    Applicant: SUNGBO INDUSTRIAL CO., LTD.
    Inventor: Keun Chul SONG
  • Publication number: 20190203445
    Abstract: A tooth for a bucket of an excavator includes a point body having a hollow insertion recess and having a pair of coupling holes provided at positions facing each other on the opposite sides, and a pair of connection units respectively inserted into the pair of coupling holes and having a unit body and a protrusion protruding from the unit body, wherein the point body includes: a guide portion positioned in each of the coupling holes and guiding a rotational operation of the protrusion, a fixing portion fixing a position of each of the inserted connection unit, a buffer portion positioned between the fixing portion and an inner surface of the point body and surrounding the fixing portion, and a support where the fixing portion and the buffer portion are positioned.
    Type: Application
    Filed: October 11, 2018
    Publication date: July 4, 2019
    Inventors: Keun Chul SONG, Dae Hyun RYU, Chang Woo LIM, Hwa Yong SHIN, Ryun Han LEE
  • Patent number: 9222511
    Abstract: The present invention relates to a sliding bearing including a lubricating oil storing unit storing lubricating oil on the surface thereof and the sliding bearing of the present invention is provided so that the volume of the lubricating oil storing unit occupies 5 to 30 volume % of the entire volume of the sliding bearing.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: December 29, 2015
    Assignee: DOOSAN INFRACORE CO., LTD.
    Inventors: Chung Rae Lee, Ki Hwan Hong, Sang Beom Kim, Keun Chul Song
  • Patent number: 8807105
    Abstract: Disclosed is a cam follower of which the structure is improved such that the limit load can be increased. The cam follower is one which moves relative to a cam, mediated by a liquid lubricant, wherein a plurality of recesses are provided on the contact surface of the cam follower which makes contact with the cam, and the depth of the plurality of recesses of the contact surface is between 0.005 and 0.03 mm. By providing the plurality of recesses on the contact surface of the cam follower which makes contact with the cam, the present invention makes it possible to improve the state of lubrication between the cam follower and the cam which move relative to each other mediated by the liquid lubricant and to reduce the heat and the wear which occur at the interface between the same.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: August 19, 2014
    Assignee: Doosan Infracore Co., Ltd.
    Inventors: Sung Gi Kim, Keun Chul Song
  • Publication number: 20120312265
    Abstract: Disclosed is a cam follower of which the structure is improved such that the limit load can be increased. The cam follower is one which moves relative to a cam, mediated by a liquid lubricant, wherein a plurality of recesses are provided on the contact surface of the cam follower which makes contact with the cam, and the depth of the plurality of recesses of the contact surface is between 0.005 and 0.03 mm. By providing the plurality of recesses on the contact surface of the cam follower which makes contact with the cam, the present invention makes it possible to improve the state of lubrication between the cam follower and the cam which move relative to each other mediated by the liquid lubricant and to reduce the heat and the wear which occur at the interface between the same.
    Type: Application
    Filed: December 20, 2010
    Publication date: December 13, 2012
    Applicant: DOOSAN INFRACORE CO., LTD.
    Inventors: Sung Gi Kim, Keun Chul Song
  • Publication number: 20110235955
    Abstract: The present invention relates to a sliding bearing including a lubricating oil storing unit storing lubricating oil on the surface thereof and the sliding bearing of the present invention is provided so that the volume of the lubricating oil storing unit occupies 5 to 30 volume % of the entire volume of the sliding bearing.
    Type: Application
    Filed: December 1, 2009
    Publication date: September 29, 2011
    Applicant: DOOSAN INFRACORE CO., LTD.
    Inventors: Chung Rae Lee, Ki Hwan Hong, Sang Beom Kim, Keun Chul Song
  • Patent number: 6756009
    Abstract: A method is provided of producing a hardmetal-bonded metal component with an enhanced bond strength. The method comprises the steps of providing an iron-based metal body, mixing and compressing raw material powder of hardmetal and binder powder containing nickel, silicon and boron into a preform, heating and sintering the preform, and applying heat to the sintered body and the iron-based metal body under a state that the sintered body is brought into contact with the iron-based metal body, to thereby cause the sintered body to be bonded to the iron-based metal body. The sintered body and the iron-based metal body are thermally treated at a temperature of 1,000 to 1,200° C. for 30 or more minutes so that boron present in the sintered body is infiltrated into grain boundaries of the iron-based metal body to form a plurality of boride spikes in a bonding interface.
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: June 29, 2004
    Assignee: Daewoo Heavy Industries & Machinery Ltd.
    Inventors: Dong Sub Sim, Kyung Woon Kim, Keun Chul Song, Jung Hwan Cho
  • Patent number: D973107
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: December 20, 2022
    Assignee: SUNGBO INDUSTRIAL CO., LTD.
    Inventors: Keun Chul Song, Dae Hyun Ryu, Hyun Soo Lee, Chang Woo Lim
  • Patent number: D973108
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: December 20, 2022
    Assignee: SUNGBO INDUSTRIAL CO., LTD.
    Inventors: Keun Chul Song, Dae Hyun Ryu, Hyun Soo Lee, Chang Woo Lim
  • Patent number: D973109
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: December 20, 2022
    Assignee: SUNGBO INDUSTRIAL CO., LTD.
    Inventors: Keun Chul Song, Dae Hyun Ryu, Hyun Soo Lee, Chang Woo Lim
  • Patent number: D973110
    Type: Grant
    Filed: June 4, 2021
    Date of Patent: December 20, 2022
    Assignee: SUNGBO INDUSTRIAL CO., LTD.
    Inventors: Keun Chul Song, Dae Hyun Ryu, Hyun Soo Lee, Chang Woo Lim
  • Patent number: D983845
    Type: Grant
    Filed: September 14, 2022
    Date of Patent: April 18, 2023
    Assignee: SUNGBO INDUSTRIAL CO., LTD.
    Inventors: Keun Chul Song, Dae Hyun Ryu, Hyun Soo Lee
  • Patent number: D1019714
    Type: Grant
    Filed: September 14, 2022
    Date of Patent: March 26, 2024
    Assignee: SUNGBO INDUSTRIAL CO., LTD.
    Inventors: Keun Chul Song, Dae Hyun Ryu, Hyun Soo Lee
  • Patent number: D1026967
    Type: Grant
    Filed: September 14, 2022
    Date of Patent: May 14, 2024
    Inventors: Keun Chul Song, Dae Hyun Ryu, Hyun Soo Lee