Patents by Inventor Duk Sang KIM
Duk Sang KIM 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).
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Publication number: 20230415332Abstract: The present invention relates to a surgical double parallelogram device, and to a surgical double parallelogram device in which respective pitch and roll module units form a double parallelogram while pitch- and roll-rotating. To this end, disclosed is the surgical double parallelogram device comprising: a plurality of pitch and roll module units in which each module forms a plurality of stages and which provides two degrees of freedom for each module to be capable of dependently pitch- and roll-rotating; and a plurality of pitch link units connected to the plurality of pitch and roll module units to form a double parallelogram.Type: ApplicationFiled: November 11, 2021Publication date: December 28, 2023Inventors: Dong-Soo KWON, Un-Je YANG, Chang-Kyun KIM, Duk-Sang KIM
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Publication number: 20230404697Abstract: The present invention relates to an apparatus for locking a surgical instrument by using magnetic force and, more specifically, to an apparatus for locking a surgical instrument by using magnetic force, which installs or uninstalls an instrument for microsurgery by using magnetic force in order to reduce a load that may occur during installing/uninstalling an instrument for microsurgery.Type: ApplicationFiled: November 11, 2021Publication date: December 21, 2023Inventors: Dong-Soo KWON, Un-Je YANG, Duk-Yoo KONG, Duk-Sang KIM
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Publication number: 20220401168Abstract: A slave device according to an example embodiment may comprise: a lower shaft; an upper shaft connected to the lower shaft so as to be able to slide with a single degree of freedom; a lower gripper rotatably supporting the lower shaft; an upper gripper rotatably supporting the upper shaft; a lower delta robot movably supporting the lower gripper; and an upper delta robot movably supporting the upper gripper.Type: ApplicationFiled: June 19, 2020Publication date: December 22, 2022Inventors: Dong Soo KWON, Un Je YANG, Duk Yoo KONG, Joon Hwan KIM, Duk Sang KIM, Jeong Do AHN, Chang Kyun KIM, Byung Sik CHEON
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Publication number: 20220240764Abstract: A colon linearizing device installed in an endoscope to linearize a colon by performing translation and expansion motions in the colon may include a ring-shaped proximal member installed to surround an outer circumferential surface of an insertion tube of an endoscope, a fixed end secured to the insertion tube, a ring-shaped distal member positioned between the proximal member and the fixed end and movably installed along a longitudinal direction of the insertion tube, and an elastic member connected between the fixed end and the distal member.Type: ApplicationFiled: March 31, 2021Publication date: August 4, 2022Applicants: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGY, EASYENDO SURGICAL, INC.Inventors: Dong Soo KWON, Han Soul KIM, Jae Min YOU, Joon Hwan KIM, Duk Sang KIM
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Publication number: 20220031065Abstract: An arm rest apparatus, according to one embodiment, may comprise: a fixed part fixed to an external object; a horizontal movement module having one end rotatably connected to the fixed part and the other end having two-translational-degree-of-freedom movement with respect to the fixed part; and an arm support module installed to have two rotational degrees of freedom with respect to the other end of the horizontal movement module.Type: ApplicationFiled: October 18, 2021Publication date: February 3, 2022Inventors: Dong Soo KWON, Duk Sang KIM, Byung Sik CHEON, Un Je YANG
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Patent number: 10337428Abstract: An apparatus for controlling an EGR valve, includes: a measurement unit to measure at least one operation condition of an engine system; a fresh air amount setting unit to set a target amount of fresh air based on the operation condition; a fresh air amount sensor to measure a current amount of fresh air introduced through an intake line; a control calculation unit to set a signal for controlling an opening degree of the EGR valve so that the current amount of fresh air follows the target amount of fresh air; and an identifier to simulate an input and an output of the engine system, and output engine system input-output sensitivity which is a ratio of a change rate of the current amount of fresh air to a change rate of the opening degree of the EGR valve.Type: GrantFiled: July 10, 2017Date of Patent: July 2, 2019Assignee: DOOSAN INFRACORE CO., LTD.Inventors: Byoung Gul Oh, Duk Sang Kim
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Patent number: 10302032Abstract: The present invention relates to control of an opening degree of an exhaust gas recirculation (EGR) valve which is provided in an engine which uses compressed natural gas as fuel. A method for controlling an EGR valve of an engine according to the present invention includes: calculating the amount of exhaust gas to be transferred from an exhaust line to an intake line according to engine operating conditions; regulating an opening degree of an EGR valve based on the calculated amount of exhaust gas; measuring a temperature of exhaust gas discharged from a combustion chamber; and increasing the opening degree of the EGR valve by a preset increment when the temperature of the exhaust gas discharged from the combustion chamber exceeds a preset reference temperature.Type: GrantFiled: May 9, 2016Date of Patent: May 28, 2019Assignee: DOOSAN INFRACORE CO., LTD.Inventors: Phil Gyu Jeon, Jin Hwa Chung, Eun A Kang, Duk Sang Kim
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Patent number: 10215197Abstract: The present disclosure relates to a method, a device, and a system for controlling a hydraulic pump of a construction machine, the system comprising: an engine; an engine control unit configured to control the engine by using engine limit torque information and current engine torque information of the engine; a hydraulic pump operated by power supplied from the engine; at least one actuator driven by a hydraulic pressure discharged from the hydraulic pump; and a hydraulic pump control device configured to control a limited swash plate angle of the hydraulic pump by using a torque of the hydraulic pump and the engine limit torque information received from the engine control unit.Type: GrantFiled: April 14, 2014Date of Patent: February 26, 2019Assignee: DOOSAN INFRACORE CO., LTD.Inventors: Dong Mok Kim, Nag In Kim, Yong Tak Hyun, Duk Sang Kim, Byung Il Kang, Min Seok Ko, Jung Ho Kim, Kyung Min Park, Lee Hyoung Cho
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Publication number: 20180283298Abstract: The present invention relates to control of an opening degree of an exhaust gas recirculation (EGR) valve which is provided in an engine which uses compressed natural gas as fuel. A method for controlling an EGR valve of an engine according to the present invention includes: calculating the amount of exhaust gas to be transferred from an exhaust line to an intake line according to engine operating conditions; regulating an opening degree of an EGR valve based on the calculated amount of exhaust gas; measuring a temperature of exhaust gas discharged from a combustion chamber; and increasing the opening degree of the EGR valve by a preset increment when the temperature of the exhaust gas discharged from the combustion chamber exceeds a preset reference temperature.Type: ApplicationFiled: May 9, 2016Publication date: October 4, 2018Inventors: Phil Gyu JEON, Jin Hwa CHUNG, Eun A KANG, Duk Sang KIM
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Publication number: 20170306870Abstract: An apparatus for controlling an EGR valve, includes: a measurement unit to measure at least one operation condition of an engine system; a fresh air amount setting unit to set a target amount of fresh air based on the operation condition; a fresh air amount sensor to measure a current amount of fresh air introduced through an intake line; a control calculation unit to set a signal for controlling an opening degree of the EGR valve so that the current amount of fresh air follows the target amount of fresh air; and an identifier to simulate an input and an output of the engine system, and output engine system input-output sensitivity which is a ratio of a change rate of the current amount of fresh air to a change rate of the opening degree of the EGR valve.Type: ApplicationFiled: July 10, 2017Publication date: October 26, 2017Inventors: Byoung Gul OH, Duk Sang KIM
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Patent number: 9284877Abstract: Disclosed is a combustion chamber of a diesel engine provided with a bowl having a concave shape so that fuel injected from an injector creates a swirl or squishing flow to be mixed with air, and the combustion chamber of the diesel engine includes: a pip protruding from a center of a lower surface of the bowl toward the injector; a lip part protruding from a side surface of the bowl toward the injector; and a main combustion chamber provided on a lower portion of the lip part and a sub combustion chamber provided on an upper portion of the lip part, with the lip part interposed therebetween, in which a surface of the sub combustion chamber is formed in a flat shape or a concave bowl shape to have a depth of the sub combustion chamber of 0.8 mm or lower.Type: GrantFiled: August 20, 2013Date of Patent: March 15, 2016Assignee: Doosan Infracore Co., Ltd.Inventors: Doc Koon Yoo, Chung Min Kim, Jong Mo Ahn, Dae Sung Han, Jin Hwan Yu, Wook Jung, Duk Sang Kim
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Publication number: 20160047399Abstract: The present disclosure relates to a method, a device, and a system for controlling a hydraulic pump of a construction machine, the system comprising: an engine; an engine control unit configured to control the engine by using engine limit torque information and current engine torque information of the engine; a hydraulic pump operated by power supplied from the engine; at least one actuator driven by a hydraulic pressure discharged from the hydraulic pump; and a hydraulic pump control device configured to control a limited swash plate angle of the hydraulic pump by using a torque of the hydraulic pump and the engine limit torque information received from the engine control unit.Type: ApplicationFiled: April 14, 2014Publication date: February 18, 2016Applicant: DOOSAN INFRACORE CO., LTD.Inventors: Dong Mok Kim, Nag In Kim, Yong Tak Hyun, Duk Sang Kim, Byung Il Kang, Min Seok Ko, Jung Ho Kim, Kyung Min Park, Lee Hyoung Cho
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Publication number: 20140076275Abstract: Disclosed is a combustion chamber of a diesel engine provided with a bowl having a concave shape so that fuel injected from an injector creates a swirl or squishing flow to be mixed with air, and the combustion chamber of the diesel engine includes: a pip protruding from a center of a lower surface of the bowl toward the injector; a lip part protruding from a side surface of the bowl toward the injector; and a main combustion chamber provided on a lower portion of the lip part and a sub combustion chamber provided on an upper portion of the lip part, with the lip part interposed therebetween, in which a surface of the sub combustion chamber is formed in a flat shape or a concave bowl shape to have a depth of the sub combustion chamber of 0.8 mm or lower.Type: ApplicationFiled: August 20, 2013Publication date: March 20, 2014Applicant: DOOSAN INFRACORE CO., LTD.Inventors: Doc Koon YOO, Chung Min KIM, Jong Mo AHN, Dae Sung HAN, Jin Hwan YU, Wook JUNG, Duk Sang KIM
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Publication number: 20140076273Abstract: The present disclosure relates to a combustion bowl shape of a direct injection diesel engine for reducing soot. The combustion bowl shape of the direct injection diesel engine for reducing soot according to the present disclosure includes: a lip part protruding from an internal circumferential surface; a main combustion bowl formed at a lower side based on the lip part; and a sub combustion bowl formed at an upper side based on the lip part, in which a diameter ratio of a combustion bowl entrance diameter of the sub combustion bowl to a main combustion bowl maximum diameter of the main combustion bowl is 1.10 to 1.40.Type: ApplicationFiled: April 4, 2013Publication date: March 20, 2014Applicant: DOOSAN INFRACORE CO., LTD.Inventors: Doc Koon YOO, Chung Min KIM, Jong Mo AHN, Dae Sung HAN, Jin Hwan YU, Wook JUNG, Duk Sang KIM