Patents by Inventor Jae-hyuk Han
Jae-hyuk Han 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).
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Publication number: 20110170215Abstract: A spindle motor assembly includes a spindle motor, a disk for storing data, the disk being installed on the spindle motor, and a disk clamp for fixing the disk to the spindle motor. The disk clamp includes a hollow formed in a central portion thereof, a coupling portion formed around an external circumference of the hollow and including a plurality of screw insertion holes into which clamp fastening screws to be coupled to the spindle motor are inserted, and a pressing portion formed around an external circumference of the coupling portion to press the disk. The coupling portion includes a first region and a second region that are asymmetrical with respect to each other, the plurality of screw insertion holes are formed in the first region only, and a thickness extension portion or a through hole is formed in at least a portion of the second region.Type: ApplicationFiled: January 10, 2011Publication date: July 14, 2011Applicant: Samsung Electronics Co., Ltd.Inventors: Jae-hyuk HAN, Sung-wook Kim, Yu-sung Kim, Hong-taek Lim
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Patent number: 7782563Abstract: A hard disk drive (HDD) includes a spindle motor, an actuator, a static eccentricity sensor, a monitor and a central controller. The spindle motor includes a rotary body and a static body adapted to support the rotary body, where the spindle motor is adapted to rotate a disk. The actuator is adapted to move a read/write head over the disk. The static eccentricity sensor is adapted to measure static eccentricity associated with the rotary body. The monitor is adapted to monitor the measured static eccentricity and generate a free-fall signal when the monitor determines that the HDD is in a free-fall state. The central controller is adapted to initiate an unloading/parking operation for the read/write head in response to the free-fall signal.Type: GrantFiled: March 18, 2009Date of Patent: August 24, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyuk Han, Cheol-soon Kim, Gun-hee Jang, Sang-jin Park
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Patent number: 7677805Abstract: A fluid dynamic bearing is constructed to support stably a rotating body to which a non-uniform force is applied, and a hard disk drive (HDD) employing the fluid dynamic bearing is provided. The fluid dynamic bearing includes a journal bearing part supporting a rotary shaft in a radial direction of the rotary shaft, a thrust part formed at one end of the rotary shaft, a thrust bearing part facing the thrust part and supporting the rotary shaft in a longitudinal direction of the rotary shaft, and a plurality of grooves formed on a surface of the thrust bearing part and/or the thrust part. The plurality of grooves include a first groove group including a plurality of grooves having the same shape and arrangement, and a second groove group adjacent to the first groove group and including at least one groove asymmetric with respect to the grooves of the first groove group.Type: GrantFiled: October 21, 2005Date of Patent: March 16, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyuk Han, Dong-ho Oh, Yong-kyu Byun, Cheol-soon Kim, Jeong-seok Koh, Nam-hoon Lee, Ja-choon Koo
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Publication number: 20090225466Abstract: A hard disk drive (HDD) includes a spindle motor, an actuator, a static eccentricity sensor, a monitor and a central controller. The spindle motor includes a rotary body and a static body adapted to support the rotary body, where the spindle motor is adapted to rotate a disk. The actuator is adapted to move a read/write head over the disk. The static eccentricity sensor is adapted to measure static eccentricity associated with the rotary body. The monitor is adapted to monitor the measured static eccentricity and generate a free-fall signal when the monitor determines that the HDD is in a free-fall state. The central controller is adapted to initiate an unloading/parking operation for the read/write head in response to the free-fall signal.Type: ApplicationFiled: March 18, 2009Publication date: September 10, 2009Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Jae-hyuk HAN, Cheol-soon KIM, Gun-hee JANG, Sang-jin PARK
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Patent number: 7525751Abstract: Embodiments of the invention provide a hard disk drive (HDD) adapted to detect when an HDD is in a free-fall state and park a head prior to impact. The HDD comprises a spindle motor comprising a rotary body and adapted to rotate a disk, wherein the disk is adapted to store data; an actuator adapted to move a read/write head to a desired position above the disk in order to read/write data; and a flying height sensor adapted to measure a flying height of the rotary body in real time. The HDD further comprises a monitor adapted to monitor the measured flying height and generate a free-fall signal when the monitor determines that the HDD is in a free-fall state; and a central controller adapted to initiate an operation for parking the read/write head in response to the free-fall signal.Type: GrantFiled: November 13, 2006Date of Patent: April 28, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Jae-hyuk Han, Cheol-soon Kim, Gun-hee Jang, Sang-jin Park
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Patent number: 7499244Abstract: A disk holder for an off-line servo-track writer is installed at a driving motor of the off-line servo-track writer in a state in which a plurality of disks for information storage are assembled to the disk holder. The disk holder has a flange for supporting the plurality of disks, a mounting portion to be joined to the driving motor is provided at one side of the flange, and a hub is provided at the other side of the flange. A space into which air flows is formed in the hub, and the plurality of disks and a plurality of spacers for maintaining a gap between the plurality of disks are assembled around the outer circumference of the hub. A plurality of pressing members are installed at the hub to move back and forth in a radial direction of the hub.Type: GrantFiled: January 30, 2006Date of Patent: March 3, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-ho Oh, Jae-hyuk Han, Yong-kyu Byun, Ja-choon Koo
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Patent number: 7497626Abstract: A spindle motor structure including a spindle motor installed on a base and having a hydrodynamic bearing supporting a shaft to be capable of rotating using hydrodynamic pressure and a driving source rotating the shaft using an electromagnetic force. A circuit board is installed to face the base and supplies driving power to the driving source. A heater is installed on the circuit board at a position facing the hydrodynamic bearing and heats the hydrodynamic bearing.Type: GrantFiled: October 25, 2005Date of Patent: March 3, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Young Son, Jeong-seok Koh, Joo-young Kwak, Jae-hyuk Han
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Patent number: 7474501Abstract: A spindle motor, which rotates a plurality of data storage disks in a hard disk drive, the spindle motor including: a shaft; an inner hub rotatably installed on an outer periphery of the shaft; and a hub assembly, which includes: an outer hub detachably coupled to an outer periphery of the inner hub, the outer hub shaped such that a plurality of disks and at least one spacer for maintaining an interval between adjacent disks of the plurality of disks can be secured to an outer periphery of the outer hub; and a fastening member coupled to a top portion of the outer hub and fixing the outer hub to the inner hub. The outer hub assembly to which the plurality of disks are secured can be mounted on an off-line servo-track writer, and can also be attached as is to the spindle motor after servo-track writing is completed.Type: GrantFiled: June 23, 2005Date of Patent: January 6, 2009Assignee: Samsung Electronics Co., Ltd.Inventors: Dong-ho Oh, Ja-choon Koo, Yong-kyu Byun, Jae-hyuk Han
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Publication number: 20070109679Abstract: Embodiments of the invention provide a hard disk drive (HDD) adapted to detect when an HDD is in a free-fall state and park a head prior to impact. The HDD comprises a spindle motor comprising a rotary body and adapted to rotate a disk, wherein the disk is adapted to store data; an actuator adapted to move a read/write head to a desired position above the disk in order to read/write data; and a flying height sensor adapted to measure a flying height of the rotary body in real time. The HDD further comprises a monitor adapted to monitor the measured flying height and generate a free-fall signal when the monitor determines that the HDD is in a free-fall state; and a central controller adapted to initiate an operation for parking the read/write head in response to the free-fall signal.Type: ApplicationFiled: November 13, 2006Publication date: May 17, 2007Inventors: Jae-hyuk Han, Cheol-soon Kim, Gun-hee Jang, Sang-jin Park
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Publication number: 20060171066Abstract: A disk holder for an off-line servo-track writer is installed at a driving motor of the off-line servo-track writer in a state in which a plurality of disks for information storage are assembled to the disk holder. The disk holder has a flange for supporting the plurality of disks, a mounting portion to be joined to the driving motor is provided at one side of the flange, and a hub is provided at the other side of the flange. A space into which air flows is formed in the hub, and the plurality of disks and a plurality of spacers for maintaining a gap between the plurality of disks are assembled around the outer circumference of the hub. A plurality of pressing members are installed at the hub to move back and forth in a radial direction of the hub.Type: ApplicationFiled: January 30, 2006Publication date: August 3, 2006Inventors: Dong-ho Oh, Jae-hyuk Han, Yong-kyu Byun, Ja-choon Koo
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Publication number: 20060165323Abstract: A spindle motor structure including a spindle motor installed on a base and having a hydrodynamic bearing supporting a shaft to be capable of rotating using hydrodynamic pressure and a driving source rotating the shaft using an electromagnetic force. A circuit board is installed to face the base and supplies driving power to the driving source. A heater is installed on the circuit board at a position facing the hydrodynamic bearing and heats the hydrodynamic bearing.Type: ApplicationFiled: October 25, 2005Publication date: July 27, 2006Inventors: Young Son, Jeong-seok Koh, Joo-young Kwak, Jae-hyuk Han
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Publication number: 20060093245Abstract: A fluid dynamic bearing is constructed to support stably a rotating body to which a non-uniform force is applied, and a hard disk drive (HDD) employing the fluid dynamic bearing is provided. The fluid dynamic bearing includes a journal bearing part supporting a rotary shaft in a radial direction of the rotary shaft, a thrust part formed at one end of the rotary shaft, a thrust bearing part facing the thrust part and supporting the rotary shaft in a longitudinal direction of the rotary shaft, and a plurality of grooves formed on a surface of the thrust bearing part and/or the thrust part. The plurality of grooves include a first groove group including a plurality of grooves having the same shape and arrangement, and a second groove group adjacent to the first groove group and including at least one groove asymmetric with respect to the grooves of the first groove group.Type: ApplicationFiled: October 21, 2005Publication date: May 4, 2006Inventors: Jae-hyuk Han, Dong-ho Oh, Yong-kyu Byun, Cheol-soon Kim, Jeong-seok Koh, Nam-hoon Lee, Ja-choon Koo
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Publication number: 20050286164Abstract: A spindle motor, which rotates a plurality of data storage disks in a hard disk drive, the spindle motor including: a shaft; an inner hub rotatably installed on an outer periphery of the shaft; and a hub assembly, which includes: an outer hub detachably coupled to an outer periphery of the inner hub, the outer hub shaped such that a plurality of disks and at least one spacer for maintaining an interval between adjacent disks of the plurality of disks can be secured to an outer periphery of the outer hub; and a fastening member coupled to a top portion of the outer hub and fixing the outer hub to the inner hub. The outer hub assembly to which the plurality of disks are secured can be mounted on an off-line servo-track writer, and can also be attached as is to the spindle motor after servo-track writing is completed.Type: ApplicationFiled: June 23, 2005Publication date: December 29, 2005Inventors: Dong-ho Oh, Ja-choon Koo, Yong-kyu Byun, Jae-hyuk Han