Patents by Inventor Chang Ha Lee

Chang Ha Lee 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: 20190178286
    Abstract: An air foil bearing assembly is provided. The air foil bearing assembly includes a bearing housing that has a hollow into which a rotary shaft is fitted and a slot of which both ends are open toward front and rear sides formed on an inner circumference surface of the hollow. A bump foil is provided to have a combining portion inserted to the slot and disposed in the inner circumference surface of the hollow. A top foil having a combining portion is inserted to the slot and is disposed in an inner side of the bump foil. A stopper is disposed on one of the combining portions of the bump foil or the top foil to prevent the combining portion of the bump foil or the top foil from being displaced from the slot toward the front and rear sides.
    Type: Application
    Filed: July 15, 2018
    Publication date: June 13, 2019
    Inventors: Kyoung Ku Ha, Chang Ha Lee
  • Patent number: 10266432
    Abstract: The present invention relates to an apparatus and a method for treating ballast water, and an exemplary embodiment of the present invention provides a ballast water treatment apparatus including: a tank; a spray nozzle which supplies ballast water in the form of droplets into the tank; and a gas circulation unit which supplies inert gas to the spray nozzle, and sucks inert gas that is not dissolved in the ballast water in the tank.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: April 23, 2019
    Assignee: University-Industry Foundation, Yonsei University
    Inventors: Chang Ha Lee, Yongha Park, Jae-Hoon Hong, Tao Wei, Doo Wook Kim, Jae-Jeong Kim, Pil Rip Jeon
  • Patent number: 10263548
    Abstract: Disclosed are a method and a system for feedback-controlling including controlling a current supply unit in a controller so that an output applied to a driving unit from the current supply unit is repeatedly turned on/off by predetermined period and duty. The method also includes feedback-controlling of an output value of the controller applied to the current supply unit from the controller so that the output of the current supply unit follows a target value. The feedback-controlling includes an integration control process and stops the integration control process in the period that the current supply unit turns off the output thereof.
    Type: Grant
    Filed: December 7, 2017
    Date of Patent: April 16, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Dong Hun Lee, Keun Bong Ham, Chang Ha Lee, Kyoung Ku Ha, Min Su Kang, Chang Seok You, Sung Do Kim
  • Patent number: 10230116
    Abstract: An air supply apparatus and method for a fuel cell, which supplies high-pressure air while avoiding a surge phenomenon of a turbo type compressor in a fuel cell system to which the turbo type compressor is applied is provided. In particular, a portion of air from an outlet of a compressor to an inlet of the compressor is recirculated to the supply of air supplied from the compressor to a stack. This recirculated air and external air introduced from the outside are mixed and supplied to the inlet of the compressor at a sufficiently high air pressure, allowing the compressor to avoid a surge region and enabling the supply of air with a high pressure and a low flow rate.
    Type: Grant
    Filed: December 11, 2014
    Date of Patent: March 12, 2019
    Assignee: Hyundai Motor Company
    Inventors: Hyuck Roul Kwon, Chang Ha Lee, Kyoung Ku Ha
  • Publication number: 20190074785
    Abstract: Disclosed are a method and a system for feedback-controlling including controlling a current supply unit in a controller so that an output applied to a driving unit from the current supply unit is repeatedly turned on/off by predetermined period and duty. The method also includes feedback-controlling of an output value of the controller applied to the current supply unit from the controller so that the output of the current supply unit follows a target value. The feedback-controlling includes an integration control process and stops the integration control process in the period that the current supply unit turns off the output thereof.
    Type: Application
    Filed: December 7, 2017
    Publication date: March 7, 2019
    Inventors: Dong Hun Lee, Keun Bong Ham, Chang Ha Lee, Kyoung Ku Ha, Min Su Kang, Chang Seok You, Sung Do Kim
  • Publication number: 20190063491
    Abstract: An air foil bearing assembly includes: a bearing housing having a hollow into which a rotary shaft is fitted and having a slot formed in an axial direction on an inner circumference surface of the hollow; a bump foil having a bending end engaged to the slot formed at one end portion, rolled in a circumferential direction inside the hollow, and having a free end of another end portion located on the bending end; a top foil having a bending end engaged to the slot formed at one end portion, rolled in a second circumferential direction inside the bump foil, and having a free end of another end portion located on the bending end; and a stopper provided on each of both sides of the top foil in the circumferential direction and preventing the bump foil from protruding radially outwards from the hollow.
    Type: Application
    Filed: November 27, 2017
    Publication date: February 28, 2019
    Inventors: Chang Ha Lee, Hyunyoo Kim
  • Patent number: 10215224
    Abstract: An air foil bearing assembly includes: a bearing housing having a hollow into which a rotary shaft is fitted and having a slot formed in an axial direction on an inner circumference surface of the hollow; a bump foil having a bending end engaged to the slot formed at one end portion, rolled in a circumferential direction inside the hollow, and having a free end of another end portion located on the bending end; a top foil having a bending end engaged to the slot formed at one end portion, rolled in a second circumferential direction inside the bump foil, and having a free end of another end portion located on the bending end; and a stopper provided on each of both sides of the top foil in the circumferential direction and preventing the bump foil from protruding radially outwards from the hollow.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: February 26, 2019
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Chang Ha Lee, Hyunyoo Kim
  • Patent number: 10170779
    Abstract: A humidifier for a fuel cell includes a membrane module which accommodates therein a humidifying membrane, a first cap unit coupled to one side of the membrane module and supplies supply air to the membrane module, a second cap unit coupled to another side of the membrane module and discharges humidified air introduced from the membrane module, and a bypass tube provided in the second cap unit and bypasses condensate water introduced into the second cap unit to the membrane module.
    Type: Grant
    Filed: November 30, 2016
    Date of Patent: January 1, 2019
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Hyunyoo Kim, Chang Ha Lee
  • Patent number: 10161444
    Abstract: An air foil thrust bearing includes a base plate and a bump foil structure attached to the base plate. The bump foil structure has two or more bump foils and one or more first rings connecting the two or more bump foils. and the air foil thrust bearing includes a top foil structure attached to the base plate. The top foil structure has two or more top foils and one or more second rings connecting the two or more top foils.
    Type: Grant
    Filed: April 11, 2017
    Date of Patent: December 25, 2018
    Assignee: Hyundai Motor Company
    Inventor: Chang Ha Lee
  • Patent number: 10138932
    Abstract: The present disclosure relates to an improved air foil thrust bearing having a reduced number of components and an increased load support area. The improved air foil thrust bearing comprises a base plate and a plurality of foils attached to the base plate, wherein each of the foils comprises a top foil section and a bump foil section connected to and integral with the top foil section.
    Type: Grant
    Filed: July 3, 2017
    Date of Patent: November 27, 2018
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventors: Kyoung-Ku Ha, Chang-Ha Lee
  • Patent number: 10090545
    Abstract: A structure of a fuel cell system and a controlling method thereof are provided. The structure of the fuel cell system includes a flow sensor that is configured to detect a flow of air introduced into the fuel cell system and an air compressor that is configured to compress the introduced air and has an air foil bearing to maintain minimum driving revolutions per minute or greater. Additionally, the system includes a flow adjuster that is connected to the fuel cell system. Accordingly, since an amount of air corresponding to a required amount of air of the fuel cell system is supplied by limiting or recirculating an excessive air supply while securing durability and durability of abrasion of the air compressor to which the air foil bearing is applied, a dry phenomenon of the fuel cell system including a stack due to the excessive supply of air is prevented.
    Type: Grant
    Filed: June 9, 2015
    Date of Patent: October 2, 2018
    Assignee: Hyundai Motor Company
    Inventors: Hyuck Roul Kwon, Kyoung Ku Ha, Hyun Yoo Kim, Chang Ha Lee
  • Patent number: 10087953
    Abstract: Provided is an air blower for a fuel cell vehicle in which a bypass flow amount that ensures a surge margin is used to cool a motor to improve the efficiency of the motor. More specifically, a seal is arranged on a rear of an impeller and an air-through channel through which a part of the compressed air flows into the inside of the motor from an impeller housing case by forming an air-through aperture is formed therein to cool the motor.
    Type: Grant
    Filed: August 19, 2013
    Date of Patent: October 2, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Hanon Systems
    Inventors: Chang Ha Lee, Myung Ju Jung, Chiyong Park, Hyunsup Yang
  • Publication number: 20180172067
    Abstract: The present disclosure relates to an improved air foil thrust bearing having a reduced number of components and an increased load support area. The improved air foil thrust bearing comprises a base plate and a plurality of foils attached to the base plate, wherein each of the foils comprises a top foil section and a bump foil section connected to and integral with the top foil section.
    Type: Application
    Filed: July 3, 2017
    Publication date: June 21, 2018
    Applicants: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Kyoung-Ku Ha, Chang-Ha Lee
  • Publication number: 20180156266
    Abstract: An air foil thrust bearing includes a base plate and a bump foil structure attached to the base plate. The bump foil structure has two or more bump foils and one or more first rings connecting the two or more bump foils. and the air foil thrust bearing includes a top foil structure attached to the base plate. The top foil structure has two or more top foils and one or more second rings connecting the two or more top foils.
    Type: Application
    Filed: April 11, 2017
    Publication date: June 7, 2018
    Applicant: HYUNDAI MOTOR COMPANY
    Inventor: Chang Ha Lee
  • Patent number: 9911991
    Abstract: Disclosed herein is an air shut-off valve for a fuel cell system that can completely close an air passage (11) communicating with a cathode of a fuel cell stack, even though a butterfly-type valve is employed, upon the halt of operation of the fuel cell system, thereby greatly improving the durability of the fuel cell stack.
    Type: Grant
    Filed: March 8, 2016
    Date of Patent: March 6, 2018
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION, DONG HEE INDUSTRIAL CO., LTD.
    Inventors: Jeong Hee Park, Chang Ha Lee, Eul Ho Son, Jae Hwan Seo
  • Patent number: 9909618
    Abstract: A thrust bearing includes: a thrust plate in a disc shape having an outer diameter and an inner diameter formed by perforating a central portion of the thrust plate; a plurality of bump foils disposed radially on a top surface of the thrust plate; a plurality of top foils in a panel shape covering each of the bump foils, where bottom surfaces of the top foils are in contact with upper ends of the bump foils; and metal blocks radially disposed on the top surface of the thrust plate and formed to be spaced apart from the bump foils. The thrust bearing can be included in an air compressor of a vehicle.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: March 6, 2018
    Assignees: Hyundai Motor Company, Kia Motors Corporation, Kookmin University Industry Academy Cooperation Foundation
    Inventors: Kyoung Ku Ha, Chang Ha Lee, Jeong Hee Park, Tae Ho Kim, Moon Sung Park, Jong Sung Lee, Young Min Kim
  • Publication number: 20180062187
    Abstract: A humidifier for a fuel cell includes a membrane module which accommodates therein a humidifying membrane, a first cap unit coupled to one side of the membrane module and supplies supply air to the membrane module, a second cap unit coupled to another side of the membrane module and discharges humidified air introduced from the membrane module, and a bypass tube provided in the second cap unit and bypasses condensate water introduced into the second cap unit to the membrane module.
    Type: Application
    Filed: November 30, 2016
    Publication date: March 1, 2018
    Inventors: Hyunyoo KIM, Chang Ha LEE
  • Publication number: 20170321744
    Abstract: A thrust bearing includes: a thrust plate in a disc shape having an outer diameter and an inner diameter formed by perforating a central portion of the thrust plate; a plurality of bump foils disposed radially on a top surface of the thrust plate; a plurality of top foils in a panel shape covering each of the bump foils, where bottom surfaces of the top foils are in contact with upper ends of the bump foils; and metal blocks radially disposed on the top surface of the thrust plate and formed to be spaced apart from the bump foils. The thrust bearing can be included in an air compressor of a vehicle.
    Type: Application
    Filed: October 26, 2016
    Publication date: November 9, 2017
    Inventors: Kyoung Ku Ha, Chang Ha Lee, Jeong Hee Park, Tae Ho Kim, Moon Sung Park, Jong Sung Lee, Young Min Kim
  • Patent number: 9771521
    Abstract: A method of reforming a heavy hydrocarbon distillate, which includes treating a heavy hydrocarbon distillate and a lignocellulosic biomass with a solvent, is provided. The method can be useful in maximizing conversion of the heavy hydrocarbon distillate into higher value-added distillate, for example, naphtha and a middle distillate, and allowing a sulfur compound produced by the decomposition of a heavy hydrocarbon distillate to catalyze pretreatment of the lignocellulosic biomass. Also, oxygen, hydroxymethylfurfural (HMF), levulinic acid, formic acid, and sulfuric acid produced by decomposition of the lignocellulosic biomass can catalyze decomposition of a heavy hydrocarbon distillate and lignocellulosic biomass, thereby activating decomposition of a heavy hydrocarbon distillate.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: September 26, 2017
    Assignee: Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Chang Ha Lee, Jae Hyuk Lee, Tran Tan Viet, Ik Sung Ahn, Doo Wook Kim
  • Publication number: 20170244117
    Abstract: Disclosed herein is an air shut-off valve for a fuel cell system that can completely close an air passage (11) communicating with a cathode of a fuel cell stack, even though a butterfly-type valve is employed, upon the halt of operation of the fuel cell system, thereby greatly improving the durability of the fuel cell stack.
    Type: Application
    Filed: March 8, 2016
    Publication date: August 24, 2017
    Applicants: Hyundai Motor Company, KIA Motors Corporation, Dong Hee Industrial Co., Ltd.
    Inventors: Jeong Hee Park, Chang Ha Lee, Eul Ho Son, Jae Hwan Seo