Patents by Inventor Cheol-woong Ahn

Cheol-woong Ahn 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: 20240149109
    Abstract: A knee joint rehabilitation apparatus for a wheelchair includes a rehabilitation apparatus frame having a height corresponding to a length of each of legs of a patient sitting on the wheelchair; an upper leg support disposed at an upper end of the rehabilitation apparatus frame and supporting upper legs of the patient thereon while the patient is sitting on the wheelchair; a lower leg support pivotably connected to the upper leg support, wherein the lower legs of the patient are seated and supported on the lower leg support; and an exercise control unit disposed on the rehabilitation apparatus frame and configured to allow the lower leg support to pivot around a connection portion between the lower leg support and the upper leg support such that the patient performs rehabilitation exercise of the knee joint thereof while sitting on the wheelchair.
    Type: Application
    Filed: January 10, 2022
    Publication date: May 9, 2024
    Applicant: HEXARHUMANCARE CO., LTD
    Inventors: Chang Soo HAN, Ho Jun KIM, Su Hyu PARK, Young Hoon JI, Jeong Ho CHO, Byung Gab RYU, Jeong Gyu PARK, Dong Eun CHOI, Cheol Woong AHN
  • Patent number: 9129637
    Abstract: Provided is a disc loading device and optical disc drive using the same. The disc loading device includes a loading roller for loading a disc in a main frame, an eject lever for discharging the disc out of the main frame, and a main slider operating the eject lever, and moving in a direction by a disc emergency ejection pin inserted from outside of the main frame.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: September 8, 2015
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Un-jin Choi, Joung-sug Ko, Sang-yun Baek, Cheol-woong Ahn
  • Patent number: 9082446
    Abstract: Provided are an optical disc drive and method for driving the optical disc drive. The method includes transporting a disc to a chucking position where a spindle is positioned using a loading roller, blocking power transferred from a loading motor to the loading roller, and chucking the disc on the spindle using power from the loading motor. Accordingly, damages to the disc caused by chucking may be prevented.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: July 14, 2015
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Un-Jin Choi, Joung-sug Ko, Sang-yun Baek, Cheol-woong Ahn
  • Patent number: 9027040
    Abstract: Provided is an optical disc drive that may discharge static electricity externally. The optical disc drive may include a step motor that is configured to move an optical pickup back and forth and a cover disposed below the optical pickup. In one aspect, the cover includes an electrostatic discharge mechanism for moving static electricity generated on the step motor through the cover.
    Type: Grant
    Filed: December 2, 2013
    Date of Patent: May 5, 2015
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Jung Sug Ko, Sang Yun Baek, Cheol Woong Ahn, Jae Gil Yu, Un Jin Choi
  • Patent number: 9003434
    Abstract: A spindle structure for an optical disc and an optical disc drive employing the spindle structure are provided. The spindle structure includes a spindle motor having a rotation axis, a spindle that is coupled to the rotation axis, and a sliding cone coupled to the spindle and inserted into a center hole of the optical disc. The sliding cone includes a plurality of hook-shaped guide rods extended toward the spindle, and the spindle includes guide holes, to which the plurality of hook-shaped guide rods are inserted into and coupled.
    Type: Grant
    Filed: March 18, 2013
    Date of Patent: April 7, 2015
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Cheol-woong Ahn, Nam-kook Baek, Sung-kyu Ha
  • Patent number: 8819709
    Abstract: Provided is a disk loading apparatus which includes a frame base on which a spindle motor is mounted. The apparatus includes a disk loading structure that loads a disk on the spindle motor, a plurality of sliders operating in connection with a loading lever, and a plurality of gears transferring the motive power to the plurality of sliders. The apparatus also includes a plurality of shafts to which the gears are coupled, and a plurality of slider guide walls that guide movement of the plurality of sliders. According to various aspects, the shafts and the slider guide walls are formed integrally with the frame base.
    Type: Grant
    Filed: October 18, 2012
    Date of Patent: August 26, 2014
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Joung-sug Ko, Sang-yun Baek, Un-jin Choi, Cheol-woong Ahn
  • Publication number: 20140223455
    Abstract: Provided is an optical disc drive that may discharge static electricity externally. The optical disc drive may include a step motor that is configured to move an optical pickup back and forth and a cover disposed below the optical pickup. In one aspect, the cover includes an electrostatic discharge mechanism for moving static electricity generated on the step motor through the cover.
    Type: Application
    Filed: December 2, 2013
    Publication date: August 7, 2014
    Inventors: Jung Sug KO, Sang Yun BAEK, Cheol Woong AHN, Jae Gil YU, Un Jin CHOI
  • Patent number: 8739193
    Abstract: A disc loading device includes a loading motor, a loading roller that is driven by the loading motor and that loads and unloads a disc, a gear device provided between the loading motor and the loading roller, the gear device including a plurality of gears, and a power train control device which is configured to control power between the plurality of gears, wherein the power train control device operatively disconnects a power transmission train between the plurality of gears when the disc is unloaded.
    Type: Grant
    Filed: February 24, 2012
    Date of Patent: May 27, 2014
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventor: Cheol-woong Ahn
  • Patent number: 8739192
    Abstract: A disc loading apparatus includes a frame base, and a sub-frame disposed on the frame base and including a turntable configured to drive a disc. The disc loading apparatus also includes a loading lever disposed on the frame base and configured to load the disc on the turntable. The disc loading apparatus includes an eject lever disposed on the frame base and configured to eject the disc from the turntable to the outside of the frame base, and an eject roller disposed at a leading end of the eject lever and configured to contact an edge of the disc. An elastic skirt portion in the disc loading apparatus includes a skirt, disposed adjacent to the eject roller, and an elastic extension portion extending from the skirt.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: May 27, 2014
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Joung-sug Ko, Sang-yun Baek, Un-jin Choi, Cheol-woong Ahn
  • Publication number: 20140115612
    Abstract: Provided is a disc loading device and optical disc drive using the same. The disc loading device includes a loading roller for loading a disc in a main frame, an eject lever for discharging the disc out of the main frame, and a main slider operating the eject lever, and moving in a direction by a disc emergency ejection pin inserted from outside of the main frame.
    Type: Application
    Filed: November 21, 2012
    Publication date: April 24, 2014
    Applicant: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Un-jin Choi, Joung-sug Ko, Sang-yun Baek, Cheol-woong Ahn
  • Patent number: 8683499
    Abstract: A disc loading apparatus is provided. The disc loading apparatus includes a frame base, a spindle motor installed in the frame base, a disc guide wall disposed at one side of the frame base and configured to guide a loading of a disc, a disc loading structure disposed in front of another side of the frame base and disposed parallel to a direction in which the disc enters to load the disc on the spindle motor, a rotational disc centering lever disposed adjacent to the guide wall to center the disc with respect to the spindle motor, and an ejecting lever disposed at a rear side of the frame base and configured to unload the disc loaded on the spindle motor.
    Type: Grant
    Filed: May 11, 2012
    Date of Patent: March 25, 2014
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Joung-sug Ko, Sang-yun Baek, Un-jin Choi, Cheol-woong Ahn
  • Patent number: 8544032
    Abstract: A disc device that includes a loading unit configured to load an storage medium into the disc device, a chucking unit configured to accommodate the loaded storage medium thereon, an ejection unit configured to eject the storage medium, and a controller configured to control the loading unit, the chucking unit, and the ejection unit. The ejection unit moves the storage medium to a loading position for loading the storage medium onto the chucking unit when the storage medium is initially inserted.
    Type: Grant
    Filed: November 8, 2011
    Date of Patent: September 24, 2013
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventor: Cheol-woong Ahn
  • Publication number: 20130212604
    Abstract: Provided are an optical disc drive and method for driving the optical disc drive. The method includes transporting a disc to a chucking position where a spindle is positioned using a loading roller, blocking power transferred from a loading motor to the loading roller, and chucking the disc on the spindle using power from the loading motor. Accordingly, damages to the disc caused by chucking may be prevented.
    Type: Application
    Filed: November 21, 2012
    Publication date: August 15, 2013
    Applicant: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Un-jin Choi, Joung-sug Ko, Sang-yun Baek, Cheol-woong Ahn
  • Publication number: 20130132980
    Abstract: Provided are a disc loading device and an optical disc drive using the same. When a disc is loaded into the optical disc drive, an eject lever and a main slider may be used to facilitate an open/close operation of a door of the optical disc drive. In addition, by shutting off power to a loading roller after loading a disc, the disc is prevented from being damaged by the loading roller while the disc is being chucked.
    Type: Application
    Filed: November 7, 2012
    Publication date: May 23, 2013
    Inventors: Un-jin Choi, Joung-sug Ko, Sang-yun Baek, Cheol-woong Ahn
  • Publication number: 20130104155
    Abstract: Provided is a disk loading apparatus which includes a frame base on which a spindle motor is mounted. The apparatus includes a disk loading structure that loads a disk on the spindle motor, a plurality of sliders operating in connection with a loading lever, and a plurality of gears transferring the motive power to the plurality of sliders. The apparatus also includes a plurality of shafts to which the gears are coupled, and a plurality of slider guide walls that guide movement of the plurality of sliders. According to various aspects, the shafts and the slider guide walls are formed integrally with the frame base.
    Type: Application
    Filed: October 18, 2012
    Publication date: April 25, 2013
    Inventors: Joung-sug Ko, Sang-yun Baek, Un-jin Choi, Cheol-woong Ahn
  • Publication number: 20130047170
    Abstract: A disc loading apparatus includes a frame base, and a sub-frame disposed on the frame base and including a turntable configured to drive a disc. The disc loading apparatus also includes a loading lever disposed on the frame base and configured to load the disc on the turntable. The disc loading apparatus includes an eject lever disposed on the frame base and configured to eject the disc from the turntable to the outside of the frame base, and an eject roller disposed at a leading end of the eject lever and configured to contact an edge of the disc. An elastic skirt portion in the disc loading apparatus includes a skirt, disposed adjacent to the eject roller, and an elastic extension portion extending from the skirt.
    Type: Application
    Filed: August 7, 2012
    Publication date: February 21, 2013
    Applicant: TOSHIBA SAMSUNG STORAGE TECHNOLOGY KOREA CORPORATION
    Inventors: Joung-sug KO, Sang-yun BAEK, Un-jin CHOI, Cheol-woong AHN
  • Publication number: 20130007780
    Abstract: A disc loading apparatus is provided. The disc loading apparatus includes a frame base, a spindle motor installed in the frame base, a disc guide wall disposed at one side of the frame base and configured to guide a loading of a disc, a disc loading structure disposed in front of another side of the frame base and disposed parallel to a direction in which the disc enters to load the disc on the spindle motor, a rotational disc centering lever disposed adjacent to the guide wall to center the disc with respect to the spindle motor, and an ejecting lever disposed at a rear side of the frame base and configured to unload the disc loaded on the spindle motor.
    Type: Application
    Filed: May 11, 2012
    Publication date: January 3, 2013
    Inventors: Joung-sug Ko, Sang-yun Baek, Un-jin Choi, Cheol-woong Ahn
  • Publication number: 20120297401
    Abstract: A disc loading device includes a loading motor, a loading roller that is driven by the loading motor and that loads and unloads a disc, a gear device provided between the loading motor and the loading roller, the gear device including a plurality of gears, and a power train control device which is configured to control power between the plurality of gears, wherein the power train control device operatively disconnects a power transmission train between the plurality of gears when the disc is unloaded.
    Type: Application
    Filed: February 24, 2012
    Publication date: November 22, 2012
    Inventor: Cheol-woong Ahn
  • Patent number: 8250592
    Abstract: Provided is an optical disk apparatus in which an interlocking slider engaged with a main slider directly drive an eject lever and a boss for performing a disk chucking operation. The optical disk apparatus includes a housing having a slot to receive a disk, a main unit having a turn table to rotate the disk, the main slider configured to move in first and second directions corresponding to insertion and ejection of the disk, the eject lever configured to eject the disk inserted into the housing through the slot, and the interlocking slider.
    Type: Grant
    Filed: April 20, 2009
    Date of Patent: August 21, 2012
    Assignee: Toshiba Samsung Storage Technology Korea Corporation
    Inventors: Cheol-woong Ahn, Un-jin Choi, Min-shik Roh, Jeong-hun Yeom, Sung-hun Lee
  • Publication number: 20120117579
    Abstract: A disc device that includes a loading unit configured to load an storage medium into the disc device, a chucking unit configured to accommodate the loaded storage medium thereon, an ejection unit configured to eject the storage medium, and a controller configured to control the loading unit, the chucking unit, and the ejection unit. The ejection unit moves the storage medium to a loading position for loading the storage medium onto the chucking unit when the storage medium is initially inserted.
    Type: Application
    Filed: November 8, 2011
    Publication date: May 10, 2012
    Inventor: Cheol-woong Ahn