Patents Assigned to Advanced Technology Co., Ltd.
  • ROTATING DEVICE
    Publication number: 20140192438
    Abstract: A rotating device includes a sleeve which encircles a shaft, a housing which supports the shaft and which forms an annular supporting recess where the lower end of the sleeve enters together with the shaft, a ring member which is provided above the sleeve and which is fixed to the shaft in a manner encircling the shaft. A first gap between the sleeve and the shaft includes first and second radial dynamic pressure generating portions. An annular sleeve recess is formed in upper face of the sleeve. The ring member includes a ring entering portion that enters the sleeve recess in a non-contact manner. An outward gap in the radial direction where the ring entering portion and the sleeve recess face with each other in the radial direction includes a second air-liquid interface of a lubricant.
    Type: Application
    Filed: March 10, 2014
    Publication date: July 10, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS JAPAN ADVANCED TECHNOLOGY CO., LTD.
    Inventors: Mitsuo KODAMA, Masafumi MIZUNO, Taketo NONAKA
  • Fluid bearing component including thrust bearing groove recesses and disk drive device including same
    Patent number: 8773815
    Abstract: An example rotating device is a disk drive device that includes a base, a hub on which a recording disk is to be mounted and which rotates relative to the base, and a fluid dynamic bearing unit that allows the hub to rotate relative to the base. The fluid dynamic bearing unit includes a shaft that performs relative rotation and a cylindrical member that encircles the shaft, the cylindrical member includes a thrust dynamic pressure generating groove which is provided in one end face of the cylindrical member and which generates thrust dynamic pressure, and the thrust dynamic pressure generating groove includes a cut-and-machined face.
    Type: Grant
    Filed: March 7, 2013
    Date of Patent: July 8, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventor: Hisayuki Aoshima
  • Manufacturing method of disk drive device capable of reducing amount of unbalance, disk drive device and subassembly thereof
    Patent number: 8773813
    Abstract: A disk drive device is provided with a recording disk, a base member, a bearing unit, and a hub member. In a marking step, unbalance information indicating the displacement of the center of gravity of the hub member with respect to the rotation center of the hub member is acquired, and an information mark containing the unbalance information is applied to at least the hub member or the base member. In an installing and adjustment step, the unbalance information is read form the information mark, and the position for installing the recording disk in an outer cylinder part is determined in accordance with the unbalance information so as to install the recording disk on the hub member.
    Type: Grant
    Filed: November 16, 2012
    Date of Patent: July 8, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Kazuyoshi Nagai, Hiroshi Iwai
  • Disk drive device
    Patent number: 8757883
    Abstract: In a disk drive device according to an embodiment, radial dynamic pressure corresponding portions are structured such that the diameters thereof expand toward the axial outside of the sleeve, and that the shaft is in surface-contact with each of the radial dynamic pressure corresponding portions when the rotational drive of the disk drive device is stopped. Further, a herringbone-shaped radial dynamic pressure groove is formed in each of the radial dynamic pressure corresponding portions. The radial dynamic pressure groove in each radial dynamic pressure corresponding portion is formed such that the axial outside length from the turned-back portion of the herringbone-shape is longer than the axial inside length therefrom.
    Type: Grant
    Filed: August 6, 2010
    Date of Patent: June 24, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventor: Mitsuo Kodama
  • Fluid dynamic bearing unit and disk drive device including the same
    Patent number: 8760810
    Abstract: A first sleeve rotatably extends around a shaft. First and second flanges are fixed to the shaft. A second sleeve extending around the first sleeve is fixed thereto. A first annular member fixed to the second sleeve surrounds the first flange. A second annular member fixed to the second flange surrounds a portion of the second sleeve. A first capillary seal includes a clearance between the first flange and the first annular member. A second capillary seal includes a clearance between the second annular member and the second sleeve. Lubricant is provided in the clearances in the first and second capillary seals. The second annular member and the second sleeve are designed so that the lubricant in the clearance in the second capillary seal can be viewed from a point in a radial position which is outward of the second sleeve as seen in an axial direction.
    Type: Grant
    Filed: September 18, 2013
    Date of Patent: June 24, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventor: Ryusuke Sugiki
  • Rotating machine provided with stator core
    Patent number: 8754563
    Abstract: A recording disk is to be mounted on a hub. A base rotatably supports the hub through a bearing. A stator core is fixed to the base and includes an annular portion and a salient pole extending radially therefrom. A magnet faces the salient pole radially and is rotated with the hub. The magnet has a plurality of magnetic poles in the circumferential direction such that each of the plurality of magnetic poles faces the salient pole. The salient pole includes a rod-shaped body around which a wire is wound and a tooth portion that is provided radially outside the rod-shaped body and extends circumferentially. The circumferential end located at the end in the circumferential direction of the tooth portion is located radially inside a circumscribed circle passing through the tip located at the radially outermost end of the tooth portion.
    Type: Grant
    Filed: June 14, 2011
    Date of Patent: June 17, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd
    Inventors: Kazuyoshi Nagai, Akira Suzuki
  • METHOD FOR MEASURING THICKNESS BY PULSED INFRARED THERMAL WAVE TECHNOLOGY
    Publication number: 20140153608
    Abstract: A method for measuring thickness or defect depth by pulsed infrared thermal wave technology is described. The method includes heating a measured object by pulsed heating devices, and at the same time, obtaining a thermal image sequence on the surface of the measured object by an infrared thermography device, and storing the thermal image sequence in a general-purpose memory. The method also includes multiplying a temperature-time curve at every point of the thermal image sequence by a corresponding time, thereby obtaining a new curve. The method also includes calculating a first-order differential and obtaining a peak time thereof. The method also includes use of one or more formulas to thereby determine the thickness or the defect depth of the measured object.
    Type: Application
    Filed: June 14, 2011
    Publication date: June 5, 2014
    Applicants: CAPITAL NORMAL UNIVERSITY, CHONGQING NORMAL UNIVERSITY, BEIJING WAITENKSIN ADVANCED TECHNOLOGY CO., LTD
    Inventors: Zhi Zeng, Xun Wang, Ning Tao, Lichun Feng
  • ROTATING DEVICE
    Publication number: 20140147065
    Abstract: A rotating device includes a shaft body that has a shaft, a first flange extending outwardly from the outer periphery of the shaft, and a second flange, a bearing body that has a shaft encircling member encircling the shaft between the first flange and the second flange, a first thrust opposing part formed between the shaft encircling member and the first flange, a second thrust opposing part formed between the shaft encircling member and the second flange, an intermediate space provided in a gap between the shaft and the shaft encircling member, a radial dynamic pressure bearing, a first communication channel that allows the first thrust opposing part to be in communication with the intermediate space, and a second communication channel that allows the second thrust opposing part to be in communication with the intermediate space.
    Type: Application
    Filed: November 21, 2013
    Publication date: May 29, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS JAPAN ADVANCED TECHNOLOGY CO., LTD.
    Inventor: Ryusuke SUGIKI
  • ROTATING DEVICE
    Publication number: 20140146416
    Abstract: A rotating device includes a rotor including a hub to receive a recording disk, and a fixed body including a base that fixedly supports a bearing unit to rotatably support the rotor. The fixed body includes a core having a cylindrical part and salient poles extending in a radial direction, a ring-shaped member having a core holding part that has the core fixed to an outer peripheral surface thereof, a sloping part extending in a direction inclined with respect to a rotational axis of the rotor from a side of the core holding part farther away from the hub, and a support part extending from a side of the sloping part farther away from the hub.
    Type: Application
    Filed: September 10, 2013
    Publication date: May 29, 2014
    Applicant: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Yusuke TOKUNAGA, Tomoya Takahashi, Kazuyoshi Nagai
  • Drinking water faucet with air gap to discharge waste water
    Patent number: 8733386
    Abstract: A drinking water faucet capable of discharging waste water includes a main body, a valve base, a water control unit, a connecting tube and a securing nut. A receiving space that is through and downward is formed inside the main body, and a trough room and an air hole are formed at front portion of the receiving space, upper portion of which has a water outlet tube. A water outlet hole and water inlet tube are located at upper and lower portions of the valve base respectively, and a water control space and discharging portion are formed at front portion of the valve base. The reflux of waste water can be prevented to contaminate the filtering components by using the combination of the air hole, the discharging portion, a waste water import tube and a waste water export tube, so the drinking water becomes more clean and safe to drink.
    Type: Grant
    Filed: July 8, 2012
    Date of Patent: May 27, 2014
    Assignee: Grand Advanced Technologies Co. Ltd.
    Inventor: Tung-Hsin Sun
  • ROTATING DEVICE
    Publication number: 20140139949
    Abstract: A rotating device comprises: a hub on which a magnetic recording disk is to be mounted; a base configured to rotatably support the hub via a bearing; a shaft configured such that it extends along the rotational axis of the hub; and a chassis arranged such that it faces the magnetic recording disk, and configured to have a Young's modulus that is smaller than that of the base. A base hole is provided to the upper face of the chassis that faces the magnetic recording disk such that it extends along the rotational axis. Furthermore, the base is fitted into the base hole, thereby fixedly mounting the base on the chassis.
    Type: Application
    Filed: November 7, 2013
    Publication date: May 22, 2014
    Applicant: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd
    Inventors: Mitsuo Kodama, Taketo Nonaka, Masafumi Mizuno
  • Unidirectional ceramic control valve structure
    Patent number: 8714520
    Abstract: A unidirectional ceramic control valve includes a valve shell, a shaft, a ring unit, an upper ceramic piece, a lower ceramic piece, a valve base and at least one anti-leak ring. Lower section of the valve shell has two hook holes, and two notches are formed therebelow. A receiving trough is formed at an inner portion of lower section of the shaft to provide a space for the ring unit and the upper ceramic piece. The ring unit is a ring-shaped body with low friction coefficient, and when the ring unit is disposed between the shaft and upper ceramic piece, it prevents the shaft from directly contacting the upper ceramic piece to generate wear. The upper ceramic piece has two symmetric water holes, while the lower ceramic piece has two symmetric circulating holes. A first protruding unit and a second protruding unit are correspondingly formed at the valve base.
    Type: Grant
    Filed: April 30, 2012
    Date of Patent: May 6, 2014
    Assignee: Grand Advanced Technologies Co. Ltd.
    Inventor: Tung-Hsin Sun
  • Rotating device
    Patent number: 8711516
    Abstract: A rotating device includes a sleeve which encircles a shaft, a housing which supports the shaft and which forms an annular supporting recess where the lower end of the sleeve enters together with the shaft, a ring member which is provided above the sleeve and which is fixed to the shaft in a manner encircling the shaft. A first gap between the sleeve and the shaft includes first and second radial dynamic pressure generating portions. An annular sleeve recess is formed in upper face of the sleeve. The ring member includes a ring entering portion that enters the sleeve recess in a non-contact manner. An outward gap in the radial direction where the ring entering portion and the sleeve recess face with each other in the radial direction includes a second air-liquid interface of a lubricant.
    Type: Grant
    Filed: July 30, 2013
    Date of Patent: April 29, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology, Co., Ltd.
    Inventors: Mitsuo Kodama, Masafumi Mizuno, Taketo Nonaka
  • ROTATING DEVICE
    Publication number: 20140111885
    Abstract: A rotating device is provided with: a hub that is rotatably supported by the base and on which a recording disk is to be mounted; a yoke that is fixedly provided on the hub and is configured to hold a magnet; a bearing unit in which one end thereof is fixedly provided on the base and in which the other end thereof is configured to hold the hub; and a coil that is fixedly provided on the base and is configured to generate electromagnetic interaction with the magnet. The hub has a screw hole in which a screw for fixing a clamper, which is used to fix the recording disk to the hub, to the hub is screwed. The screw hole penetrates the hub. The yoke is configured such that the yoke covers one end of the screw hole.
    Type: Application
    Filed: October 14, 2013
    Publication date: April 24, 2014
    Applicant: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Hirotake NISHINO, Akira Suzuki, Kazuyoshi Nagai
  • Method of forming a through hole by laser drilling
    Patent number: 8704127
    Abstract: A method for forming a through hole, which resolves many problems of conventional method for forming a through hole by applying laser beam and can easily control a shape of the through hole so as to form even diameters at a laser incident side and an opposite side without dependence on a shape of a work object, and form a counter-tapered hole with a diameter at the opposite side larger than that at the incident side, is provided. In the method based on a laser ablation method for forming a through hole, the laser beam is applied on a laser beam exit surface of the work object to be in contact with at least one of a colloid solution of a high-polymer material, a solution of a high-polymer material or polyol.
    Type: Grant
    Filed: March 2, 2009
    Date of Patent: April 22, 2014
    Assignee: Wavelock Advanced Technology Co., Ltd.
    Inventors: Susumu Nakamura, Kaoru Itagaki
  • Fluid dynamic bearing unit and rotating device
    Patent number: 8693137
    Abstract: A rotating device includes a fluid dynamic bearing unit. The fluid dynamic bearing unit includes a shaft encircling member that encircles a shaft, an intermediate encircling member that encircles the shaft encircling member, a shaft holder formed with a shaft hole into which an end of the shaft is fitted to fix the shaft, a base-side encircling member fixed to the shaft holder and encircling the intermediate encircling member, and a ring member fixed to the intermediate encircling member and encircling a rod encircling member. A lubricant is present between a rotating body and a fixed body. A first air-liquid interface is present between the base-side encircling member and the intermediate encircling member, and a second air-liquid interface is present between the ring member and the rod encircling member.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: April 8, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Mitsuo Kodama, Ryusuke Sugiki, Takuji Yamada, Masafumi Mizuno
  • Production method of disk drive device for cleaning subassemblies and disk drive device produced by said production method
    Patent number: 8683699
    Abstract: A production method of a disk drive device includes: an assembling process of assembling a subassembly by incorporating at least a bearing unit in a hub in a clean room; a pouring process of pouring a lubricant in the bearing unit; a cleaning-liquid discharging process of discharging a cleaning liquid to the hub; a cleaning-liquid intake process of taking in the cleaning liquid discharged to the hub; and a sealing process of sealing the subassembly in a seal-material.
    Type: Grant
    Filed: December 7, 2010
    Date of Patent: April 1, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventor: Mitsuhiro Aono
  • METHOD FOR MANUFACTURING ROTATING DEVICE
    Publication number: 20140082929
    Abstract: A rotating device includes a hub on which a magnetic recording disk is to be mounted, and a base that supports the hub in a freely rotatable manner. When at least either one of the base and the hub is referred to as a work-piece, a method for manufacturing the rotating device includes a forming step for forming the work-piece, a blowing step for blowing the formed work-piece with solid grains, a cleaning step for cleaning the work-piece blown by the grains using a cleaning fluid, an assembling step for assembling the rotating device using the cleaned work-piece. The grains have a property of vaporizing in the cleaning step or being soluble with the cleaning fluid therein.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 27, 2014
    Applicant: SAMSUNG ELECTRO-MECHANICS JAPAN ADVANCED TECHNOLOGY CO., LTD.
    Inventors: Mitsuhiro AONO, Kenji NISHIHARA
  • Disk driving apparatus having improved quality
    Patent number: 8681453
    Abstract: A disk driving apparatus includes a base member, a hub member, and a fluid bearing unit. The base member has a head movement region on which a head unit is to be mounted such that a head portion of the head unit can be moved along the radial direction of a recording face in a reciprocating manner while facing the recording face of a recording disk to be mounted on the hub member, and a recessed housing portion housing the fluid bearing unit such that it surrounds at least a part of a rotor unit supported by the fluid bearing unit. Furthermore, the base member has an inhibiting wall at a boundary between the head movement region and the recessed housing portion so as to prevent a lubricant fluid from migrating toward the recording disk side.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: March 25, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Tetsuo Kitamura, Yuji Omura, Aikra Suzuki
  • Disk drive device for rotating a disk
    Patent number: 8674570
    Abstract: In the brushless motor, a magnetic recording disk is to be mounted on a hub. A base plate rotatably supports the hub on the upper surface. A laminated core is fixed on the upper surface of the base plate and has a ring portion and a plurality of teeth that extend radially from the ring portion. Coils are wound around the plurality of teeth. A cylindrical magnet is fixed to the hub and is magnetized for driving with a plurality of poles along the circumferential direction and is arranged to radially face the plurality of teeth of the laminated core. A wire of one end of one of the coils is drawn out to the bottom surface of the base plate through a hole arranged on the base plate. The wire is connected to a driving line for supplying a current to the coils at a position other than the position of the hole on the base plate. The hole of the base plate is plugged with a resin.
    Type: Grant
    Filed: April 23, 2013
    Date of Patent: March 18, 2014
    Assignee: Samsung Electro-Mechanics Japan Advanced Technology Co., Ltd.
    Inventors: Hiroki Yamazaki, Hiroshi Muramatsu