Patents by Inventor Eui-Dong Roh

Eui-Dong Roh 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: 11400851
    Abstract: Disclosed is a breather valve for controlling a pressure of a transfer channel of a valve assembly. The valve assembly controls charging and discharging of hydrogen in a hydrogen fuel cell-based vehicle. The breather valve includes a vent ring movably received in a distal portion of the transfer channel and having a ventilation hole communicating with a main portion of the transfer channel; and a vent valve received in the distal portion of the transfer channel and screw-coupled to the transfer channel to open or close the ventilation hole.
    Type: Grant
    Filed: August 13, 2020
    Date of Patent: August 2, 2022
    Assignee: UNICK CORPORATION
    Inventors: Chang-Hoon Lee, Eui-Dong Roh, Jung-Tae Kim, Ji-Yong Lee
  • Publication number: 20220148782
    Abstract: A solenoid actuator includes a casing body having a receiving space defined therein; a casing cover coupled to the casing body, wherein the casing cover includes a connector for transmission of power and signal; a bobbin assembly installed in the receiving space; a core coupled to and extending through the bobbin assembly, wherein the core has a working space defined therein; a housing surrounding a lower end of the core protruding out of the bobbin assembly; a plunger movably installed in the working space; and a rod coupled to and extending through the core, wherein the rod moves under movement of the plunger. The bobbin assembly includes a bobbin terminal, and the casing cover includes a connector terminal, wherein when the casing cover is coupled to the casing body, the connector terminal is connected to the bobbin terminal.
    Type: Application
    Filed: October 26, 2021
    Publication date: May 12, 2022
    Inventors: Chang-Hoon Lee, Eui-Dong Roh, Chan-Shik Ahn, Bong-Ki Choi, Ji-Hoon Park, Jeong-Hyun Seo
  • Publication number: 20220144216
    Abstract: A washer liquid supply valve includes a valve body provided with an inflow hole and a discharge hole configured to allow a washer liquid to flow into and out of the valve body therethrough, a housing detachably combined with an upper part of the valve body, a coil assembly installed in the housing and configured to generate magnetic force when power is applied to the washer liquid supply valve, a core combined with the coil assembly while penetrating the coil assembly and magnetized by the magnetic force generated by the coil assembly, plunger installed in the core so as to be movable and configured to be moved upwards when power is applied to the washer liquid supply valve, and a spring interposed between the core and the plunger so as to elastically support the plunger towards the valve body.
    Type: Application
    Filed: November 5, 2021
    Publication date: May 12, 2022
    Inventors: Jong Min Park, Nak Kyoung Kong, Jin Hee Lee, Ki Hong Lee, Chang Hoon Lee, Ho Hoon Hwang, Eui Dong Roh, Ki Ryong Lee, Jong Wook Lee, Sin Won Kang, Seong Jun Kim, Jong-hyun Jin, Moo Ha Hwang, Yeong-Su Kim, Gyu Won Han, Young Joon Shin
  • Patent number: 11078816
    Abstract: Disclosed herein are an oil pump control valve and, specifically, an oil pump control valve allowing a discharge port and the inside of a solenoid part to communicate with each other through a spool so as to relieve pressure inside the solenoid part. A spool flow path, a vent hole, and a spool notch are formed so as to allow the solenoid part to communicate with the outside regardless of the flow of fluids when the valve is operated, thereby enabling the internal pressure of the solenoid part to be relieved. In addition, the spool and a rod are integrated such that the axial misalignment of the spool can be prevented and a holder has different diameter such that the flow of fluids can be controlled even during an abnormal power shutdown.
    Type: Grant
    Filed: February 13, 2017
    Date of Patent: August 3, 2021
    Assignee: UNICK CORPORATION
    Inventors: Chang-Hoon Lee, Eui-Dong Roh, Jeong-Tae Kim, Ji-Hoon Park, Yeong-Jin Jeong, Jun-Hyo Park
  • Publication number: 20210129730
    Abstract: Disclosed is a breather valve for controlling a pressure of a transfer channel of a valve assembly. The valve assembly controls charging and discharging of hydrogen in a hydrogen fuel cell-based vehicle. The breather valve includes a vent ring movably received in a distal portion of the transfer channel and having a ventilation hole communicating with a main portion of the transfer channel; and a vent valve received in the distal portion of the transfer channel and screw-coupled to the transfer channel to open or close the ventilation hole.
    Type: Application
    Filed: August 13, 2020
    Publication date: May 6, 2021
    Inventors: Chang-Hoon Lee, Eui-Dong Roh, Jung-Tae Kim, Ji-Yong Lee
  • Publication number: 20190234256
    Abstract: Disclosed herein are an oil pump control valve and, specifically, an oil pump control valve allowing a discharge port and the inside of a solenoid part to communicate with each other through a spool so as to relieve pressure inside the solenoid part. A spool flow path, a vent hole, and a spool notch are formed so as to allow the solenoid part to communicate with the outside regardless of the flow of fluids when the valve is operated, thereby enabling the internal pressure of the solenoid part to be relieved. In addition, the spool and a rod are integrated such that the axial misalignment of the spool can be prevented and a holder has different diameter such that the flow of fluids can be controlled even during an abnormal power shutdown.
    Type: Application
    Filed: February 13, 2017
    Publication date: August 1, 2019
    Inventors: Chang-Hoon Lee, Eui-Dong Roh, Jeong-Tae Kim, Ji-Hoon Park, Yeong-Jin Jeong, Jun-Hyo Park
  • Publication number: 20180180194
    Abstract: A solenoid valve includes a valve that regulates the entrance and exit of oil, and a solenoid that operates the valve. The valve includes a hollow holder extending in one direction, ports including a supply port, a control port, and a discharge port, a passage that is formed in the holder and extends in the longitudinal direction of the holder, wherein a chamber connecting the supply port and the discharge port is formed in the middle of the passage, a spool movably installed in the passage, a channel that is formed in the spool and has one end connected to the control port and the other end connected to the chamber, a control land that divides the chamber into a supply chamber and a discharge chamber, and a spring that is installed between the holder and the spool to elastically support the spool.
    Type: Application
    Filed: December 27, 2017
    Publication date: June 28, 2018
    Inventors: Chang-Hoon Lee, Eui-Dong Roh, Jeong-Tae Kim, Chan-Shik Ahn, Tae-Hyeon Kim
  • Patent number: 9470122
    Abstract: An oil pump control valve assembly includes a control valve for controlling a flow of a fluid, and a solenoid for operating the control valve. The control valve includes a tube-like holder having a hollow internal space, configured to include an inflow port formed at one end thereof, a tube-like first valve sheet formed in the middle of the holder, a ball valve mounted in the first valve sheet, a second valve sheet coupled to a second end of the first valve sheet, and a load mounted in the second valve sheet, one end thereof being extended through the second valve sheet to come into contact with the ball valve, wherein, when the solenoid is operated, the ball valve is moved to open the inflow port.
    Type: Grant
    Filed: November 1, 2012
    Date of Patent: October 18, 2016
    Assignee: UNICK CORPORATION
    Inventors: Chang Hoon Lee, Eui Dong Roh, Ji Hoon Park
  • Patent number: 9169941
    Abstract: A solenoid valve includes a valve configured to control a flow of a fluid; and a solenoid configured to operate the valve. The valve includes: a holder having a double tube structure including an inner tube formed with a supply passage and an outer tube, a control passage being formed between the inner tube and the outer tube; a first connection port formed at a first end of the inner tube to connect the supply passage and the control passage; a ball installed within the supply passage to open and close the first connection port; a core coupled to a first end of the outer tube; a second connection port formed in the core and connected to the control passage; and a load installed to extend through the second connection port and moved by the solenoid.
    Type: Grant
    Filed: August 8, 2013
    Date of Patent: October 27, 2015
    Assignee: Unick Corporation
    Inventors: Chang Hoon Lee, Eui Dong Roh, Ki Ryong Lee
  • Patent number: 8925582
    Abstract: The present invention relates to an oil control valve for a variable valve lift system that obtains in a stable manner a constant hydraulic pressure in the hydraulic line connecting the oil control valve and the vale lift control actuator, and thereby reliably controls valve lift according to the number of revolutions and load of the engine.
    Type: Grant
    Filed: December 8, 2010
    Date of Patent: January 6, 2015
    Assignee: Unick Corporation
    Inventors: Chang-Hoon Lee, Eui-Dong Roh, Ji-Hoon Park, Ki-Ryong Lee
  • Publication number: 20140311440
    Abstract: An oil pump control valve assembly includes a control valve for controlling a flow of a fluid, and a solenoid for operating the control valve. The control valve includes a tube-like holder having a hollow internal space, configured to include an inflow port formed at one end thereof, a tube-like first valve sheet formed in the middle end of the holder, a ball valve mounted in the first valve sheet, a second valve sheet coupled to a second end of the first valve sheet, and a load mounted in the second valve sheet, one end thereof being extended through the second valve sheet to come into contact with the ball valve, wherein, when the solenoid is operated, the ball valve is moved to open the inflow port.
    Type: Application
    Filed: November 1, 2012
    Publication date: October 23, 2014
    Inventors: Chang Hoon Lee, Eui Dong Roh, Ji Hoon Park
  • Publication number: 20140042353
    Abstract: A solenoid valve includes a valve configured to control a flow of a fluid; and a solenoid configured to operate the valve. The valve includes: a holder having a double tube structure including an inner tube formed with a supply passage and an outer tube, a control passage being formed between the inner tube and the outer tube; a first connection port formed at a first end of the inner tube to connect the supply passage and the control passage; a ball installed within the supply passage to open and close the first connection port; a core coupled to a first end of the outer tube; a second connection port formed in the core and connected to the control passage; and a load installed to extend through the second connection port and moved by the solenoid.
    Type: Application
    Filed: August 8, 2013
    Publication date: February 13, 2014
    Applicant: Unick Corporation
    Inventors: Chang Hoon Lee, Eui Dong Roh, Ki Ryong Lee
  • Publication number: 20130048106
    Abstract: The present invention relates to an oil control valve for a variable valve lift system that obtains in a stable manner a constant hydraulic pressure in the hydraulic line connecting the oil control valve and the vale lift control actuator, and thereby reliably controls valve lift according to the number of revolutions and load of the engine.
    Type: Application
    Filed: December 8, 2010
    Publication date: February 28, 2013
    Applicant: UNICK CORPORATION
    Inventors: Chang-Hoon Lee, Eui-Dong Roh, Ji-Hoon Park, Ki-Ryong Lee