Patents Assigned to Youngdo Ind. Co., Ltd.
  • Patent number: 12013052
    Abstract: Provided is a valve assembly for a gas vessel including: a valve body mounted at an inlet of the gas vessel and connected to a gas supply source; a connection part connected to the gas supply source on a side surface of the valve body; a check valve mounted on the connection part; and a safety valve mounted on the side surface of the valve body to discharge a fuel gas in the gas vessel to the outside when a gas pressure inside the gas vessel increases above a certain pressure or higher. The valve assembly for a gas vessel is connected to the lower end of the valve body and arranged in the gas vessel to block the gas passage when the fuel gas introduced through the valve body is charged to a set value to prevent overcharging of the fuel gas.
    Type: Grant
    Filed: December 20, 2022
    Date of Patent: June 18, 2024
    Assignee: YOUNGDO IND. CO., LTD.
    Inventor: Kwang Ho Lee
  • Patent number: 10907749
    Abstract: Provided is a fluid control solenoid valve including: a valve body; a valve seat mounted on a lower portion thereof; a coil mounted on an outer circumferential surface thereof and to which power is applied; a core mounted on an inner surface thereof; a lower plunger movably disposed on the inner surface thereof and formed with an orifice and integrally formed with a tight contact portion to be in tight contact with the valve seat on a bottom surface thereof; and an actuating unit arranged to be linearly moved on an upper side of the lower plunger, actuated by interlocking the lower plunger and formed with an actuating rod which is linearly moved and which is in close contact with the orifice. A fluid flow delay unit is provided on an outer surface of the lower plunger to generate pressure difference between upper and lower portions of the lower plunger.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: February 2, 2021
    Assignee: YOUNGDO IND. CO., LTD.
    Inventor: Kwang Ho Lee
  • Patent number: 9644793
    Abstract: Provided is a fluid control valve assembly including: a main valve body having a first flow passage that is mounted on an inlet of a high-pressure vessel and through which a charging source gas passes, a second flow passage through which a feeding source gas passes, and a third flow passage to which the first flow passage and the second flow passage are connected; a manual valve that is mounted on the main valve body and that opens and closes the third flow passage; a solenoid valve that is mounted on the main valve body and that opens and closes the second flow passage by an electrical signal; a first check valve that is provided on the first flow passage to thus block a reverse flow of the charging source gas; and a second check valve that is provided on the second flow passage to thus block a reverse flow of the feeding source gas, and block the charging source gas from flowing in the second flow passage, to thereby prevent the charging source gas from flowing in the solenoid valve.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: May 9, 2017
    Assignee: Youngdo Ind. Co., Ltd.
    Inventor: Kwang Ho Lee
  • Publication number: 20150184805
    Abstract: Provided is a fluid control valve assembly including: a main valve body having a first flow passage that is mounted on an inlet of a high-pressure vessel and through which a charging source gas passes, a second flow passage through which a feeding source gas passes, and a third flow passage to which the first flow passage and the second flow passage are connected; a manual valve that is mounted on the main valve body and that opens and closes the third flow passage; a solenoid valve that is mounted on the main valve body and that opens and closes the second flow passage by an electrical signal; a first check valve that is provided on the first flow passage to thus block a reverse flow of the charging source gas; and a second check valve that is provided on the second flow passage to thus block a reverse flow of the feeding source gas, and block the charging source gas from flowing in the second flow passage, to thereby prevent the charging source gas from flowing in the solenoid valve.
    Type: Application
    Filed: May 20, 2013
    Publication date: July 2, 2015
    Applicant: YOUNGDO IND. CO., LTD.
    Inventor: Kwang Ho Lee
  • Publication number: 20100303668
    Abstract: The present invention relates to a fusible alloy for pressure relief devices (PRDs), and the present invention provides a fusible alloy for PRD, the alloy comprising 29.0 to 33.0% by weight of Bi, 14.0 to 21.0% by weight of Sn, 2.0 to 5.0% by weight of In, and substantially Pb for the balance. The fusible alloy for PRD of the invention has a melting point appropriate for use according to the 110° C.-grade standards, and has excellent wettability upon melting.
    Type: Application
    Filed: December 28, 2006
    Publication date: December 2, 2010
    Applicant: YOUNGDO IND. CO., LTD.
    Inventor: Kwang Ho Lee
  • Patent number: 7686036
    Abstract: The valve apparatus includes: a valve body whose one side is combined with the movable oxygen cylinder, which communicates with a discharge port at the other side thereof along a path from one side thereof lengthily therein, to thus discharge out the oxygen of the oxygen cylinder through the discharge port. An opening which opens outwards from an insertion space provided along the path, and a post valve which is installed at the other side of the valve body and controls discharge of oxygen through the discharge port from the oxygen cylinder according to operation of a lever. A charge adapter whose one side is detachably installed in the opening of the insertion space, which charges oxygen supplied from the outside into the oxygen cylinder when the post valve closes the path, and discharges oxygen of the oxygen cylinder through the discharge port when the post valve opens the path.
    Type: Grant
    Filed: April 6, 2009
    Date of Patent: March 30, 2010
    Assignee: Youngdo Ind. Co., Ltd.
    Inventor: Kwang Ho Lee