Patents by Inventor Hyeon Cheol Choi

Hyeon Cheol Choi 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: 11542568
    Abstract: An heat treatment apparatus for a vehicle body component includes, a jig base, a lower fixed die fixedly installed on the jig base and supporting the vehicle body component that is press-molded into a predetermined shape, a heating unit installed on the lower fixed die and locally heating the vehicle body component, a plurality of side movable dies that can move reciprocally disposed at both sides of the lower fixed die, installed on the jig base, and selectively combinable with the lower fixed die, a cooling unit installed on each side movable die and cooling a heating portion of the vehicle body component, and an upper movable die that can move reciprocally in the up and down direction correspondingly to the lower fixed die, and configured to clamp the vehicle body component through the lower fixed die and at least one of the side movable dies combined together.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: January 3, 2023
    Assignees: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Hyeon-Cheol Choi
  • Publication number: 20220033922
    Abstract: An heat treatment apparatus for a vehicle body component includes, a jig base, a lower fixed die fixedly installed on the jig base and supporting the vehicle body component that is press-molded into a predetermined shape, a heating unit installed on the lower fixed die and locally heating the vehicle body component, a plurality of side movable dies that can move reciprocally disposed at both sides of the lower fixed die, installed on the jig base, and selectively combinable with the lower fixed die, a cooling unit installed on each side movable die and cooling a heating portion of the vehicle body component, and an upper movable die that can move reciprocally in the up and down direction correspondingly to the lower fixed die, and configured to clamp the vehicle body component through the lower fixed die and at least one of the side movable dies combined together.
    Type: Application
    Filed: January 8, 2021
    Publication date: February 3, 2022
    Applicants: HYUNDAI MOTOR COMPANY, KIA MOTORS CORPORATION
    Inventor: Hyeon-Cheol CHOI
  • Patent number: 8789559
    Abstract: A flow path switching valve includes a tube body including one or more inlets opened to communicate with a fluid supplying source and supplying fluid into an inside of the tube body, outlets opened at opposite sides to the respective inlets and selectively alternately discharging fluid from the inside of the tube body, drains opened at opposite ends and discharging operating fluid introduced through the outlet, and seat units respectively protrude on an inner circumference of the tube body between the inlet(s), outlets and drains. An operating rod, coaxially mounted in the tube body, includes spaced apart projection units and is connected to an operating unit at one end so as to reciprocate axially within the tube body responsive to the operating unit. Valve bodies are movably disposed on an outer circumference of the operating rod and are arranged between the respective projection units to face respective seat units.
    Type: Grant
    Filed: October 25, 2011
    Date of Patent: July 29, 2014
    Assignee: Hyosung Goodsprings, Inc.
    Inventors: Gi-Chul Jung, Sang-Gyu Jeon, Man-Gon Kang, Soon-Kwang Kwon, Hyeon-Cheol Choi
  • Publication number: 20120103449
    Abstract: A flow path switching valve includes a tube body including one or more inlets opened to communicate with a fluid supplying source and supplying fluid into an inside of the tube body, outlets opened at opposite sides to the respective inlets and selectively alternately discharging fluid from the inside of the tube body, drains opened at opposite ends and discharging operating fluid introduced through the outlet, and seat units respectively protrude on an inner circumference of the tube body between the inlet(s), outlets and drains. An operating rod, coaxially mounted in the tube body, includes spaced apart projection units and is connected to an operating unit at one end so as to reciprocate axially within the tube body responsive to the operating unit. Valve bodies are movably disposed on an outer circumference of the operating rod and are arranged between the respective projection units to face respective seat units.
    Type: Application
    Filed: October 25, 2011
    Publication date: May 3, 2012
    Applicant: Hyosung Goodsprings, Inc.
    Inventors: Gi-Chul Jung, Sang-Gyu Jeon, Man-Gon Kang, Soon-Kwang Kwon, Hyeon-Cheol Choi
  • Publication number: 20100176379
    Abstract: The present invention relates to a self-aligned organic thin film transistor (TFT) and a fabrication method thereof. According to the present invention, a gate electrode is formed from a first conductive layer patterned on a substrate, a gate dielectric layer is formed on top of the substrate to cover the gate electrode, and a second conductive layer is then formed on the gate dielectric layer. Subsequently, ultraviolet (UV) backside exposure for irradiating the second conductive layer with UV from a bottom side of the substrate using the gate electrode as a mask, and source/drain electrodes self-aligned with the gate electrode is then formed not to overlap with the gate electrode by developing the second conductive electrode. Thereafter, an organic semiconductor layer is formed between and on the source/drain electrodes. In the present invention, an organic TFT can be fabricated using a reel-to-reel process, and therefore, the fabrication process can be simplified.
    Type: Application
    Filed: May 30, 2008
    Publication date: July 15, 2010
    Applicant: KOREA INSTITUTE OF MACHINERY & MATERIALS
    Inventors: Kang Dae Kim, Taik Min Lee, Hyeon Cheol Choi, Dong Soo Kim, Byun Oh Choi