Patents by Inventor Yonghwa Hong

Yonghwa Hong 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: 20250196447
    Abstract: Provided is a laser welding device using a laser to fuse resin material parts to each other, and more particularly, a thermosetting resin laser welding device fixing a fusion target by using a transparent fixing member to perform fusion while a laser is emitted to an exact fusion point, and capable of emitting the laser to the fusion point by using a refraction of the laser even when an obstacle is present in a straight line between a laser light source and the fusion point.
    Type: Application
    Filed: December 4, 2024
    Publication date: June 19, 2025
    Inventors: Yonghwa HONG, Hyunduck JUNG, Hyuntae LEE
  • Publication number: 20240399706
    Abstract: Provided is a laser welding structure which may couple parts to each other by using a laser welding, and more particularly, a laser welding structure enabling laser welding of thermosetting resin including a glass fiber, the laser welding structure for the thermosetting resin including the glass fiber according to the present disclosure, and the method using the same, configured as described above, may provide the improved welding structure by coupling the parts made of the glass fiber-reinforced PPS material to each other by the laser welding.
    Type: Application
    Filed: May 28, 2024
    Publication date: December 5, 2024
    Applicant: COAVIS
    Inventors: Yonghwa HONG, Hyunduck JUNG
  • Patent number: 11905957
    Abstract: Provided is a water pump having improved efficiency by simplifying its structure, the water pump including: an outer housing having a shape of a container, and including an inlet part positioned at a lower end, and an outlet part positioned at a side of an upper end; an inner housing having a shape of a container, including a communication hole positioned at an upper end and communicating the inside and outside with each other, and inserted into the outer housing; a thrust key coupled to the inside of the outer housing; and a first screw and a second screw, inserted into the inner housing, having lower ends supported by the thrust key, and engaged with each other to be rotated together.
    Type: Grant
    Filed: November 28, 2022
    Date of Patent: February 20, 2024
    Assignee: COAVIS
    Inventors: Hyuntae Lee, Wookeun Lee, Yonghwa Hong
  • Patent number: 11781566
    Abstract: Provided is a water pump which may be easily manufactured and a manufacturing method thereof, the water pump including: a motor housing having a concave container shape; a lower casing including a first side wall protruding downward for a lower end of the first side wall to be in contact with an upper end of the motor housing; and an upper casing fitted to the outside of the lower casing, and including a second side wall protruding downward for a lower end of the second side wall to be in contact with the upper end of the motor housing, wherein the upper end of the motor housing, the lower end of the first side wall, and the lower end of the second side wall are simultaneously fusion-coupled with one another.
    Type: Grant
    Filed: November 23, 2022
    Date of Patent: October 10, 2023
    Assignee: COAVIS
    Inventors: Joonseup Kim, Wansung Pae, Hyuntae Lee, Wookeun Lee, Yonghwa Hong
  • Patent number: 8187790
    Abstract: Disclosed are a polymer for a chemically amplified resist represented as and a resist composition using the same. In the above Chemical formula 1, X represents vinyl ether derivatives or olefin derivatives, at least one of R1, R2, R3, and R4 is an alkyl group with 1 to 30 carbon atoms containing at least one functional group of a hydrogen atom, an ether group, an ester group, a carbonyl group, an acetal group, an epoxy group, a nitryl group (—CN), and an aldehyde group, l, m, n, o and p respectively represent repeating units, l represents a real number of 0.05 to 0.5, m and n respectively represent real numbers of 0.1 to 0.7, o and p respectively represent real numbers of 0 to 0.7, and a sum of l, m, n, o and p is 1.
    Type: Grant
    Filed: April 2, 2009
    Date of Patent: May 29, 2012
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Hyunsang Joo, Jinho Kim, Yonghwa Hong, Changsoo Lee
  • Publication number: 20100081079
    Abstract: Disclosed are a polymer for a chemically amplified resist represented as and a resist composition using the same. In the above Chemical formula 1, X represents vinyl ether derivatives or olefin derivatives, at least one of R1, R2, R3 and R4 is an alkyl group with 1 to 30 carbon atoms containing at least one functional group of a hydrogen atom, an ether group, an ester group, a carbonyl group, an acetal group, an epoxy group, a nitryl group (—CN), and an aldehyde group, l, m, n, o and p respectively represent repeating units, l represents a real number of 0.05 to 0.5, m and n respectively represent real numbers of 0.1 to 0.7, o and p respectively represent real numbers of 0 to 0.7, and a sum of l, m, n, o and p is 1.
    Type: Application
    Filed: April 2, 2009
    Publication date: April 1, 2010
    Inventors: Hyunsang JOO, Jinho KIM, Yonghwa HONG, Changsoo LEE