Patents by Inventor Joo Young Chun

Joo Young Chun 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: 10403406
    Abstract: The present invention relates to a lower end fitting for reducing flow resistance due to an in-core instrument in a nuclear fuel assembly, that is, a lower end fitting (100) having a plurality of flow holes for a nuclear fuel assembly, in which the flow holes (121) are formed under an assembly groove in which an instrumentation tube (131) for a nuclear fuel assembly is inserted, and at least two or more flow holes (121) are formed at a predetermined distance from the central axis (C) of the instrumentation tube (131).
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: September 3, 2019
    Assignee: KEPCO NUCLEAR FUEL CO., LTD.
    Inventors: Jin Sun Kim, Jae Ik Kim, Sang Youn Jeon, Kyong Bo Eom, Dong Geun Ha, Seong Soo Kim, Joo Young Ryu, O Cheol Kwon, Su Pil Ryu, Hak In Lee, Joo Hong Chun, Ba Leum Kim
  • Patent number: 9929672
    Abstract: A rectifier includes: first and second high side switches including source terminals connected to an alternating current input terminal and drain terminals connected to one end of an output capacitor; first and second low side switches including drain terminals connected to the alternating current input terminal and source terminals connected to a ground terminal and another end of the output capacitor; and a cross connector configured to allow parasitic capacitance of the first high side switch or the second high side switch to flow to a ground when the first high side switch or the second high side switch is turned off.
    Type: Grant
    Filed: February 11, 2016
    Date of Patent: March 27, 2018
    Assignees: Samsung Electro-Mechanics Co., Ltd., Research & Business Foundation Sungkyunkwan University
    Inventors: Chang Soo Kang, Chul Gyun Park, Kang Yoon Lee, Joo Young Chun
  • Patent number: 9774274
    Abstract: An active rectifier and a wireless power reception apparatus using the same are disclosed herein. The active rectifier includes first and fourth switches, second and third switches, and a synchronization control unit. The first and fourth switches are turned on while the voltage of an alternating current (AC) input is negative, and apply the current of the AC input to a rectifying capacitor. The second and third switches are turned on while a voltage of the AC input is positive, and apply the current of the AC input to the rectifying capacitor. The synchronization control unit compensates for the delay time of the comparator for detecting zero-crossing of the AC input so as to switch the first to fourth switches.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: September 26, 2017
    Assignee: Research & Business Foundation Sungkyunkwan University
    Inventors: Kang Yoon Lee, Jae Hyung Jang, Hyung Gu Park, Joo Young Chun
  • Patent number: 9669541
    Abstract: Disclosed herein is a robot arm including a first joint portion connected to an end portion of a wire and operable to rotate when the wire is pulled, a second joint portion connected to the first joint portion through a link, and a wire guide composed of a rotational plate rotatably installed at the second joint portion and a pair of idle rollers provided to continuously contact the rotational plate, in which the wire passes between the idle rollers.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: June 6, 2017
    Assignee: Hyundai Motor Company
    Inventors: Joo Young Chun, Hun Keon Ko
  • Patent number: 9573271
    Abstract: A wearable apparatus for assisting muscle strength includes: a base supported on an upper body of a wearer; a support member coupled to the base and spaced forward at a predetermined distance from the base; and a wire having a first end connected to an arm of the wearer across the support member and supporting the arm of the wearer by lifting the arm in a state of being supported by the support member when a second end of the wire is pulled.
    Type: Grant
    Filed: September 22, 2015
    Date of Patent: February 21, 2017
    Assignee: Hyundai Motor Company
    Inventor: Joo Young Chun
  • Publication number: 20160352248
    Abstract: A rectifier includes: first and second high side switches including source terminals connected to an alternating current input terminal and drain terminals connected to one end of an output capacitor; first and second low side switches including drain terminals connected to the alternating current input terminal and source terminals connected to a ground terminal and another end of the output capacitor; and a cross connector configured to allow parasitic capacitance of the first high side switch or the second high side switch to flow to a ground when the first high side switch or the second high side switch is turned off.
    Type: Application
    Filed: February 11, 2016
    Publication date: December 1, 2016
    Applicants: Samsung Electro-Mechanics Co., Ltd., Research & Business Foundation Sungkyunkwan University
    Inventors: Chang Soo KANG, Chul Gyun PARK, Kang Yoon LEE, Joo Young CHUN
  • Publication number: 20160325428
    Abstract: A wearable apparatus for assisting muscle strength includes: a base supported on an upper body of a wearer; a support member coupled to the base and spaced forward at a predetermined distance from the base; and a wire having a first end connected to an arm of the wearer across the support member and supporting the arm of the wearer by lifting the arm in a state of being supported by the support member when a second end of the wire is pulled.
    Type: Application
    Filed: September 22, 2015
    Publication date: November 10, 2016
    Inventor: Joo Young Chun
  • Patent number: 9358683
    Abstract: A wire-driven robot includes pairs of arm parts including shoulder joints, elbow joints, and wrist joints to move with a motion of a wearer; a shoulder wire connected with the pair of shoulder joints; a shoulder driving unit applying a rotational force to the shoulder joints by winding or unwinding the shoulder wire in link with the motion of the wearer; an elbow wire connected with the pair of elbow joints; an elbow driving unit applying a rotational force to the elbow joints by winding or unwinding the elbow wire in link with the motion of the wearer; a wrist wire connected to the pair of wrist joints; and a wrist driving unit applying a rotational force to the wrist joints by winding or unwinding the wrist wire in link with the motion of the wearer.
    Type: Grant
    Filed: July 8, 2014
    Date of Patent: June 7, 2016
    Assignee: Hyundai Motor Company
    Inventors: Hun Keon Ko, Joo Young Chun
  • Publication number: 20150263534
    Abstract: An active rectifier and a wireless power reception apparatus using the same are disclosed herein. The active rectifier includes first and fourth switches, second and third switches, and a synchronization control unit. The first and fourth switches are turned on while the voltage of an alternating current (AC) input is negative, and apply the current of the AC input to a rectifying capacitor. The second and third switches are turned on while a voltage of the AC input is positive, and apply the current of the AC input to the rectifying capacitor. The synchronization control unit compensates for the delay time of the comparator for detecting zero-crossing of the AC input so as to switch the first to fourth switches.
    Type: Application
    Filed: March 13, 2015
    Publication date: September 17, 2015
    Applicant: Research & Business Foundation SUNGKYUNKWAN UNIVERSITY
    Inventors: Kang Yoon LEE, Jae Hyung JANG, Hyung Gu PARK, Joo Young CHUN
  • Patent number: 9136075
    Abstract: Disclosed is a switch module located within a steering wheel of a vehicle that includes an input switch module, a feedback module, and a controller. The input switch module allows a driver to conduct a variety of switching operations by, for example, pressing the left, right, front, or back of the steering wheel, or by making a leftward or rightward torsional motion or a leftward or rightward diagonal motion with respect to the steering wheel. The switch module controller receives inputs from the input switch module that correlate to these switching operations, and outputs a signal to a vehicle device such as, for example, a head up display, and also to a feedback module, which provides a feedback response to the driver confirming the switching operation. The present invention allows the driver to control vehicle devices and systems while maintaining contact with the steering wheel, thereby improving vehicle safety.
    Type: Grant
    Filed: May 8, 2012
    Date of Patent: September 15, 2015
    Assignee: Hyundai Motor Company
    Inventor: Joo Young Chun
  • Publication number: 20150165621
    Abstract: A wire-driven robot includes pairs of arm parts including shoulder joints, elbow joints, and wrist joints to move with a motion of a wearer; a shoulder wire connected with the pair of shoulder joints; a shoulder driving unit applying a rotational force to the shoulder joints by winding or unwinding the shoulder wire in link with the motion of the wearer; an elbow wire connected with the pair of elbow joints; an elbow driving unit applying a rotational force to the elbow joints by winding or unwinding the elbow wire in link with the motion of the wearer; a wrist wire connected to the pair of wrist joints; and a wrist driving unit applying a rotational force to the wrist joints by winding or unwinding the wrist wire in link with the motion of the wearer.
    Type: Application
    Filed: July 8, 2014
    Publication date: June 18, 2015
    Inventors: Hun Keon Ko, Joo Young Chun
  • Publication number: 20150165618
    Abstract: Disclosed herein is a robot arm including a first joint portion connected to an end portion of a wire and operable to rotate when the wire is pulled, a second joint portion connected to the first joint portion through a link, and a wire guide composed of a rotational plate rotatably installed at the second joint portion and a pair of idle rollers provided to continuously contact the rotational plate, in which the wire passes between the idle rollers.
    Type: Application
    Filed: October 14, 2014
    Publication date: June 18, 2015
    Inventors: Joo Young Chun, Hun Keon Ko
  • Publication number: 20130147284
    Abstract: Disclosed is a switch module located within a steering wheel of a vehicle that includes an input switch module, a feedback module, and a controller. The input switch module allows a driver to conduct a variety of switching operations by, for example, pressing the left, right, front, or back of the steering wheel, or by making a leftward or rightward torsional motion or a leftward or rightward diagonal motion with respect to the steering wheel. The switch module controller receives inputs from the input switch module that correlate to these switching operations, and outputs a signal to a vehicle device such as, for example, a head up display, and also to a feedback module, which provides a feedback response to the driver confirming the switching operation. The present invention allows the driver to control vehicle devices and systems while maintaining contact with the steering wheel, thereby improving vehicle safety.
    Type: Application
    Filed: May 8, 2012
    Publication date: June 13, 2013
    Applicant: HYUNDAI MOTOR COMPANY
    Inventor: Joo Young Chun