Patents by Inventor Byoung-gyou Choi

Byoung-gyou 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: 8213123
    Abstract: An actuator latch system of a hard disk drive (HDD) retains a rotatable swing arm of the HDD in place when a magnetic head of the HDD is parked. The actuator latch system includes a portion of the swing arm that defines a notch at an end portion of a swing arm, and a latch lever that has at least one main hook and a rebound hook, and an elastic buffering arm. The latch lever is disposed on the base member adjacent the end portion of the swing arm and is supported so as to be rotatable. The at least one main hook prevents the swing arm from initially rotating in one direction beyond a certain point, and the rebound hook prevents the swing arm from rotating beyond a certain point after the swing arm rebounds upon colliding with the at least one main hook.
    Type: Grant
    Filed: February 5, 2008
    Date of Patent: July 3, 2012
    Assignee: Seagate Technology International
    Inventors: Ji-Ho Hwang, Byoung-gyou Choi, Do-wan Kim
  • Patent number: 8159787
    Abstract: An HDD includes a base, a swing arm, a VCM coil disposed on the rear end portion of the swing arm, a lower yoke and an upper yoke disposed below and above the VCM coil, at least one magnet attached to the yokes, and a latch lever levitated by the at least one magnet. The latch lever includes a hook at one end and a counterbalance at another end. A first magnetic retractor is installed on the counterbalance to apply torque to the latch lever. The first retract member is disposed such that the vertical component of the net magnetic force applied to the first retractor by the magnet(s) is about 0 when the latch lever is located at a position at which a first air gap and a second air gap exist, respectively, immediately below and above the latch lever.
    Type: Grant
    Filed: February 4, 2008
    Date of Patent: April 17, 2012
    Assignee: Seagate Technology International
    Inventors: Byoung-gyou Choi, Dong-wook Kim
  • Patent number: 8116041
    Abstract: An FPC holding mechanism of an actuator assembly of a hard disk drive (HDD) includes an FPC holder protruding from an arm-mold of the actuator assembly, and an FPC clip mounted to the FPC holder so as to be rotatable. The FPC holder defines a guide groove into which the FPC is inserted and a first side support plate facing one side surface of the FPC. The FPC clip includes a second side support plate juxtaposed with the first side support plate and facing the other side surface of the FPC, and at least two clip arms extending in a horizontal direction over upper and lower edges of the FPC, respectively. At least one of the clip arms has a hook hooked onto the first side support plate. The FPC holding mechanism thus prevents a portion of the FPC from moving in vertical and horizontal directions.
    Type: Grant
    Filed: January 29, 2008
    Date of Patent: February 14, 2012
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Min-pyo Hong, Byoung-gyou Choi, No-yeol Park
  • Patent number: 8040636
    Abstract: A hard disk drive includes a magnetic retractor situated at and integrated with the pivot holder of a head stack assembly. An actuator arm of the head stack assembly supports a read/write head, a bobbin supports a voice coil of a voice coil motor, and the actuator arm and bobbin extend in generally opposite directions from pivot holder. The pivot holder receives a pivot such that the actuator arm can be rotated about an axis of the pivot. The voice coil motor also includes a pair of magnets (permanent magnet). The retractor interacts with the magnets of the voice coil motor to generate a retract force which urges the actuator arm to a position at which the read/write head is parked. By providing the retractor on the pivot holder, the retract force will always be close to that specified according to the design of the drive.
    Type: Grant
    Filed: January 22, 2009
    Date of Patent: October 18, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byoung Gyou Choi, Jeong Il Chun
  • Patent number: 7859851
    Abstract: A flexible printed circuit board and a bracket structure for the hard disk drive. The flexible printed circuit board includes a base layer, a circuit layer provided on the base layer, a cover layer provided on the circuit layer, and a filter layer interposed between the base layer and the circuit layer. Also, the bracket structure includes a flexible printed circuit board for driving an actuator, a bracket connected to the flexible printed circuit board, and a filter interposed between the flexible printed circuit board and the bracket. Thermal asperity caused by fine particles in the hard disk drive is prevented so that performance deterioration of the hard disk drive is prevented and reliability thereof is improved.
    Type: Grant
    Filed: December 8, 2005
    Date of Patent: December 28, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Sang-chul Shin, Byoung-gyou Choi, Jeong-seon Kim, Jun-young Lee
  • Publication number: 20100232064
    Abstract: A hard disk drive, in which a flexible printed circuit board (FPC) bracket is readily assembled and sealed to a base together with a gasket header even though a screw or a sealing tape that involves a screw driver or other assembling tools is not used, or a boss of the base is not tapped.
    Type: Application
    Filed: March 16, 2010
    Publication date: September 16, 2010
    Applicant: Samsung Electronics Co., Ltd.
    Inventors: Hong Taek LIM, Youn Tai Kim, Byoung Gyou Choi, Jung Hyeon Kim, Jae-Bum Kim, Seung-Cheol Yang
  • Patent number: 7697227
    Abstract: A hard disk drive includes a disk pack having at least one disk for recording and/or storing data and a spindle motor that support and rotates the disk, a base to which the disk pack is mounted, a cover that covers an upper surface of the base, and a respective filter disposed close to each of at least one of the major surfaces of the disk and extending in the radial direction of the disk including over at least an inner peripheral region of the disk. The filter has an absorbent layer capable of absorbing particles that come in contact with it. Particles on the surface of the disk, from the inner to the outer peripheral regions of the disk, are removed by the filter when the disk is rotated and the particles are flung off of the disk. Thus, particles will not damage the magnetic head(s) of the hard disk drive nor will the particles cause errors to occur in the recording and/or reproducing of data.
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: April 13, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byoung-Gyou Choi, Kwang-Kyu Kim
  • Patent number: 7663837
    Abstract: A rotor blade and an HDD (hard disk drive) having the same, wherein the rotor blade is mounted together with a disk-shaped data storing medium on a spindle motor of the HDD to rotate coaxially with the disk-shaped data storing medium. The rotor blade includes a plurality of blades to increase a floating force applied to a slider that records or reads data on or from the disk-shaped data storing medium by increasing a speed of an airflow in an inner region of the disk-shaped data storing medium.
    Type: Grant
    Filed: October 26, 2006
    Date of Patent: February 16, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Hong-taek Lim, Byoung-gyou Choi, Sung-wook Kim
  • Patent number: 7643242
    Abstract: Provided is a hard disk drive (HDD) assembly. The HDD assembly includes: a HDD including a base member, a cover member, a spindle motor, a data storage disk, and an actuator; and a printed circuit board (PCB) disposed beside the HDD and operating the HDD. The HDD assembly can be mounted on an electronic device, for example, a mobile phone. In this case, the HDD assembly is mounted between a main PCB and a back cover of the mobile phone using a first damping pad interposed between the cover member and the main PCB and a second damping pad interposed between the base member and the back cover. The PCB for the HDD is disposed on the main PCB of the mobile phone to be placed beside the HDD.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: January 5, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-kyu Byun, Min-pyo Hong, No-yeol Park, Byoung-gyou Choi
  • Patent number: 7616408
    Abstract: A hard disk drive (HDD) with an efficient connection between a flexible printed circuit and an actuator arm. The structure includes a flexible printed circuit having the flexible printed circuit and a stiffener for supporting the flexible printed circuit, and an actuator arm to which the flexible printed circuit is connected. An alignment hole, an alignment pin inserted into the alignment hole, a guide groove having one opened side, and a guide protrusion fitted into the guide groove are formed in the flexible printed circuit and the actuator arm, and the alignment hole and the alignment pin are fixed to each other through a soldering process.
    Type: Grant
    Filed: December 30, 2005
    Date of Patent: November 10, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byoung-gyou Choi, Ki-tag Jeong
  • Patent number: 7616400
    Abstract: Provided are a hard disk drive (HDD) assembly and a mobile phone employing the HDD assembly. The HDD assembly includes: a HDD including a base member, a cover member, a spindle motor installed on the base member, at least one data storage disk mounted on the spindle motor, and an actuator pivotably installed on the base member and moving a read/write head to a predetermined position on the disk; a printed circuit board (PCB) disposed beside the HDD and operating the HDD; and a mounting bracket mounted on an electronic device while accommodating the HDD and the PCB, and including a first accommodating space adapted to accommodate the HDD and a second accommodating space disposed beside the first accommodating space and adapted to accommodate the PCB.
    Type: Grant
    Filed: June 17, 2005
    Date of Patent: November 10, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-kyu Byun, No-yeol Park, Min-pyo Hong, Sang-min Suh, Byoung-gyou Choi
  • Patent number: 7602585
    Abstract: A suspension assembly has a flexure limiter and an actuator of a disk drive adopting the flexure limiter. The suspension assembly elastically biases a slider toward a surface of a disk, in which a read/write head is mounted on the slider. In the suspension assembly, a load beam is coupled to an end portion of a swing arm of the actuator and has sidewalls bent along both outside edges thereof. A flexure supports the slider and has a rear end portion fixed to a disk facing surface of the load beam and a front end portion extended toward a front end portion of the load beam. A flexure limiter is bent from the front end portion of the flexure toward the load beam to face a surface opposite to the disk facing surface of the load beam, thus limiting a range of pitching and rolling movements of the flexure.
    Type: Grant
    Filed: November 16, 2004
    Date of Patent: October 13, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Byoung-gyou Choi
  • Patent number: 7587808
    Abstract: A method of coupling a voice coil motor to a bowl-type base plate of a hard disk drive is described for a hard disk drive including a voice coil motor having a coil coupled to a rear end portion of an actuator arm, an upper yoke and a lower yoke provided at upper and lower portions of the coil respectively, a bowl-type base plate having a plurality of flattened structures for fastening the lower yoke in a position relative to the bowl-type base plate and a countersink formed in the lower yoke.
    Type: Grant
    Filed: January 12, 2007
    Date of Patent: September 15, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Do-wan Kim, Byoung-gyou Choi
  • Publication number: 20090185313
    Abstract: A hard disk drive includes a magnetic retractor situated at and integrated with the pivot holder of a head stack assembly. An actuator arm of the head stack assembly supports a read/write head, a bobbin supports a voice coil of a voice coil motor, and the actuator arm and bobbin extend in generally opposite directions from pivot holder. The pivot holder receives a pivot such that the actuator arm can be rotated about an axis of the pivot. The voice coil motor also includes a pair of magnets (permanent magnet). The retractor interacts with the magnets of the voice coil motor to generate a retract force which urges the actuator arm to a position at which the read/write head is parked. By providing the retractor on the pivot holder, the retract force will always be close to that specified according to the design of the drive.
    Type: Application
    Filed: January 22, 2009
    Publication date: July 23, 2009
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Byoung Gyou Choi, Jeong Il Chun
  • Patent number: 7532439
    Abstract: An actuator latch apparatus for a hard disk drive (HDD). The actuator latch apparatus includes a first latch formed on one end portion of a swing arm, a notch formed on the one end portion of the swing arm and spaced a predetermined interval from the first latch in a pivoting direction of the swing arm, and a latch lever pivotably installed on a base member. The latch lever includes a second latch contacting the first latch when the swing arm pivots in a first direction, and a hook engaging with the notch when the swing arm pivots in a second direction opposite to the first direction. Facing surfaces of the first latch and the second latch are inclined such that the first latch and the second latch slide into contact with each other when the swing arm pivots in the first direction.
    Type: Grant
    Filed: July 25, 2005
    Date of Patent: May 12, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Yong-kyu Byun, Min-pyo Hong, Jeong-il Chun, Heung-seong Jang, Byoung-gyou Choi
  • Patent number: 7453669
    Abstract: A suspension assembly elastically biasing a slider toward a surface of a disk, in which a read/write head is mounted on the slider. In the suspension assembly, a load beam is coupled to a first portion of a swing arm of the actuator. A flexure supports the slider and has a first end portion fixed to a disk facing surface of the load beam and a second end portion extended toward a first end portion of the load beam. An end-tab is extended from the first end portion of the load beam. When the head is parked, the end-tab is supported by a ramp, which is arranged at an outside of the disk.
    Type: Grant
    Filed: January 18, 2005
    Date of Patent: November 18, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Byoung-gyou Choi, Jeong-seon Kim, Dong-lyoul Shin, Tcherniak Valeri, Krasnoslobodtsev Valery
  • Publication number: 20080192386
    Abstract: An actuator latch system of a hard disk drive (HDD) retains a rotatable swing arm of the HDD in place when a magnetic head of the HDD is parked. The actuator latch system includes a portion of the swing arm that defines a notch at an end portion of a swing arm, and a latch lever that has at least one main hook and a rebound hook, and an elastic buffering arm. The latch lever is disposed on the base member adjacent the end portion of the swing arm and is supported so as to be rotatable. The at least one main hook prevents the swing arm from initially rotating in one direction beyond a certain point, and the rebound hook prevents the swing arm from rotating beyond a certain point after the swing arm rebounds upon colliding with the at least one main hook.
    Type: Application
    Filed: February 5, 2008
    Publication date: August 14, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Ji-Ho Hwang, Byoung-gyou Choi, Do-wan Kim
  • Publication number: 20080192385
    Abstract: An HDD includes a base, a swing arm having a notch at a rear end portion and mounted to the base so as to be rotatable, a VCM coil disposed on the rear end portion of the swing arm, a lower yoke and an upper yoke disposed below and above the VCM coil, at least one magnet attached to the yokes, and a latch lever levitated by the at least one magnet. The latch lever is mounted to the base so as to be rotatable, and includes a hook at one end and a counterbalance at another end. The latch lever is mounted to the base so as to be rotatable. A first magnetic retractor is installed on the counterbalance to apply torque to the latch lever. The first retract member is disposed such that the vertical component of the net magnetic force applied to the first retractor by the magnet(s) is 0 or negligible when the latch lever is located at a position at which a first air gap and a second air gap exist, respectively, immediately below and above the latch lever.
    Type: Application
    Filed: February 4, 2008
    Publication date: August 14, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Byoung-gyou Choi, Dong-wook Kim
  • Publication number: 20080180851
    Abstract: An FPC holding mechanism of an actuator assembly of a hard disk drive (HDD) includes an FPC holder protruding from an arm-mold of the actuator assembly, and an FPC clip that is mounted to the FPC holder so as to be rotatable relative to the FPC holder. The FPC holder defines a guide groove into which the FPC is inserted and a first side support plate facing one side surface of the FPC. The FPC clip includes a second side support plate juxtaposed with the first side support plate and facing the other side surface of the FPC, and at least two clip arms extending in a horizontal direction over upper and lower edges of the FPC, respectively. At least one of the clip arms has a hook that is hooked onto the first side support plate. The FPC holding mechanism thus prevents a portion of the FPC from moving in vertical and horizontal directions.
    Type: Application
    Filed: January 29, 2008
    Publication date: July 31, 2008
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Min-pyo HONG, Byoung-gyou CHOI, No-yeol PARK
  • Patent number: 7289301
    Abstract: A voice coil motor coupling structure of a hard disk drive for coupling a voice coil motor to a base plate of the hard disk drive, the voice coil motor includes a coil coupled to a rear end portion of an actuator arm, an upper yoke and a lower yoke provided at upper and lower portions of the coil, respectively, separated at a predetermined distance from the coil, and a magnet attached to the lower surface of the upper yoke.
    Type: Grant
    Filed: January 22, 2004
    Date of Patent: October 30, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Do-wan Kim, Byoung-gyou Choi