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7342746 |
Disk drive including a balancing ring with a balancing weight attached to a lower end of a spindle motor hub
A disk drive includes a disk drive base and a spindle motor including a spindle motor hub, a spindle motor shaft and a stator. The hub includes an upper end and a lower end. The hub is rotatably...
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7304820 |
Method of positioning disk-shaped medium
The method of positioning a disk-shaped medium is capable of precisely positioning the center of the disk-shape medium with respect to a center of a rotary shaft. The method comprises the steps of:...
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7300209 |
Aerodynamic bearing assembly for spindle motor for hard disk drives
Disclosed is an aerodynamic bearing assembly for a spindle motor for hard disk drives, in which a hub of the spindle motor is pivoted in both radial and thrust directions by the ball bearing, which...
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7294946 |
Motor using dynamic gas bearings
A dynamic pressure gas bearing motor in which a radial dynamic pressure gas bearing and a thrust dynamic pressure gas bearing are ensured to have sufficient length and diameter even though the...
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7295400 |
Method and apparatus for mechanically balancing the disk pack of a hard disk drive
The invention includes a method making a balanced disk pack for a hard disk drive, from a disk pack including a spindle motor rigidly coupled, and aligned by at least two open screw holes, with a...
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7294944 |
Brushless motor
A compact, highly accurate and inexpensive brushless motor is disclosed. A bearing is fixed to the inner periphery of a cylindrical portion of a housing, and a shaft is rotatably inserted through...
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7286320 |
Hard disk drive having a damper for reducing vibrations
A hard disk drive having a vibration reducing damper is disclosed. The hard disk drive is provided with a damper which is interposed between a through hole provided at a cover plate and a screw...
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7283325 |
Apparatus and system for centering media disks on the hub of a spindle motor in a hard disk drive
A device for centering and securing data storage disks to the hub of a spindle motor in a hard disk drive has a chamfer and a countersink on the top of the spindle motor shaft center. During the...
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7266881 |
Method of manufacturing a top portion and a bottom portion for later assembly of a hermitically sealed hard disk drive
A hermetically sealed mobile hard disk drive that combines high storage capacity and performance with low power consumption and portable operation, including an integrated base substrate. One...
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7265939 |
Spindle motor and disk drive unit
Disclosed is a spindle motor and a disk drive unit equipped with the same, having advantages of preventing hard collision between a disk and a signal conversion element due to lifting of rotating...
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7262935 |
Top cover attached single plate fluid dynamic bearing motor
In one aspect of the invention, a motor having improved stiffness is provided. In one embodiment, the motor includes a stationary shaft, a hub, a thrust plate and a counter plate. The thrust plate...
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7251100 |
Mounting interface for a spindle motor
A mounting interface for a spindle motor allows the optimization of the spindle dynamics. The mounting interface provides a steadfast relationship between a motor and a baseplate, wherein the...
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7246440 |
Spindle motor and method of manufacturing the same
A spindle motor is formed so as to support a pivot of a rotor by a pair of open bearings. The open bearings thus constructed will be less expensive and simple structures, so that a manufacturing...
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7245457 |
Magnetic disk drive using femto slider and having predetermined linear velocity and gram load configuration
A magnetic disk drive includes a magnetic disk and a femto slider. The magnetic disk has a minimum track linear velocity of 1 to 5 m/s. In one embodiment, the magnetic disk drive includes a...
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7239477 |
Low profile air-oil hybrid fluid dynamic bearing motor
A short form fluid dynamic bearing motor is provided comprising a stationary shaft attached at a first end to a motor cover, a plate supported on a second end of the shaft, a hub rotatably...
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7234227 |
Methods for centering disks in a magnetic disk assembly
An apparatus and a method are provided to facilitate building of a disk stack for inclusion in a magnetic disk drive. A spindle is provided which comprises first and second disk contacts. A...
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7215508 |
Ceramic dynamic-pressure bearing and hard disk drive using the same
A ceramic dynamic-pressure bearing includes a first member 14 having a cylindrical outer surface and a second member 15 having a cylindrical reception hole formed therein. The first member 14 ...
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7212376 |
Disk drive system with hydrodynamic bearing lubricant having charge-control additive comprising dioctyldiphenylamine and/or oligomer thereof
An improved disk drive system that employs a lubricant with improved charge control is provided. The disk drive system is comprised of a rotatably mounted magnetic disk. A rotor is coupled to the...
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7199971 |
Balancing a rotatable body in multiple planes using invertible balancing plugs
Multiple balancing plugs ( 114 ) preferably have a common length and a common offset center of gravity ( 130 ) in the length dimension for providing dual plane balancing of a rotatable body ( 100...
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7196868 |
Hydrodynamic bearing and disk recording/reproducing apparatus having a vent inside a fixed shaft
Radial dynamic pressure grooves are provided in a first region 4 A and a second region 4 B on the side of a fixed shaft 2 . A vent 2 D is provided inside the top end 2 A of the fixed shaft 2...
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7193811 |
Fluid dynamic bearing with non-linear damping
Thus, if a shock or other disturbance to the system occurs that tilts the bearing assembly, the resulting motion is both a tilting, and a motion which is axial. If a shock axially moves the hub...
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7190549 |
Slim spindle motor and micro-drive apparatus comprising the same
A slim spindle motor and a micro-drive apparatus including the slim spindle motor are provided. In the spindle motor, a hub is rotatably mounted on a base plate by ball bearings. The hub is used to...
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7188402 |
Disc centering device
A disc centering device includes a base plate, a chuck which is installed on the base plate, a hub unit which is detachably engaged to the chuck and in which a plurality of discs are stacked, disc...
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7187517 |
Magnetic brake for disk drive
A magnetic brake to prevent rotation of the spindle motor and disk(s). The magnetic brake includes two magnets, one attached to the spindle, clamp, disk, or motor, and the other magnet is coupled...
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7187518 |
Flexible printed circuit for spindle motor and disk drive having the same
A flexible printed circuit (FPC), electrically connecting a spindle motor on a base of a disk drive with a printed circuit board (PCB) outside of the base, and a disk drive including the FPC, are...
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7180703 |
Disk drive comprising a spindle motor employing anionic/cationic lubricant to reduce disk surface potential
A disk drive is disclosed comprising a disk, a head actuated over the disk, and a spindle motor for rotating the disk. The spindle motor comprises a rotating component, a stationary component, and...
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7169360 |
Rotary drive in an instrument for processing microscale liquid sample volumes
The invention relates to a rotary drive adapted for creating liquid flow in rotatable microfluidic discs. A rotary drive for spinning a disc shaped substrate having microfluidic structures formed...
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7167338 |
Magnetic disk apparatus
A magnetic disk apparatus for reading and writing information to a magnetic disk including a motor for rotating the magnetic disk mounted thereon; a disk-shaped clamp for mounting the magnetic disk...
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7155807 |
Method of centering media disks on the hub of a spindle motor in a hard disk drive
A method for centering and securing data storage disks to the hub of a spindle motor in a hard disk drive has a chamfer and a countersink on the top of the spindle motor shaft center. During the...
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7154704 |
Data storage device with a low profile spindle motor having hub and drive member arranged on opposite sides of a baseplate
A data storage device ( 10 ) includes a stator ( 20 ), a rotor ( 50 ) rotatable about the stator via a pair of bearings ( 26 ), a cover ( 70 ), and two data storage disks ( 80 ). The stator...
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7133250 |
Inboard thrust surface fluid recirculation pump
An inboard thrust surface is provided for a spindle motor that maintains fluid flow through a journal bearing and generates an added offset pressure to avoid any subambient pressure within a...
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7126786 |
Motor/encoder assembly for tape drives
A magnetic/encoder assembly has a compact design and combines the features of motor, encoder and chuck locating feature within a single motor housing. The motor/encoder includes a DC brushless...
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7123441 |
Electric motor having foil-shaped substrate with tracks with varying width
An electric motor ( 19 ) comprises a first part ( 21 ) and a second part ( 23 ) which are moveable with respect to each other. The first part comprises a foil-shaped insulating substrate ( 51 ) on...
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7122922 |
Base plate for spindle motor
A base plate for a spindle motor is provided defining a minimal axial gap with a relatively rotatable magnet. In an example, a surface of the base plate is positioned at 0.1 mm from an adjacent...
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7113365 |
Disk drive comprising a spindle motor having a windings shield for reduced disk voltage coupling
A disk drive is disclosed comprising a disk, a head actuated over a surface of the disk, and a spindle motor for rotating the disk. The spindle motor comprises a ring-shaped stator having a...
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7109631 |
Low cogging and easy-to-downsize spindle motor structure
The present invention relates to a low cogging and easy-to-downsize spindle motor structure. The motor is an axial magnetic flux spindle motor comprising a stator assembly and a rotor assembly. The...
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7102851 |
Hydrodynamic bearing and disk recording/reproducing apparatus
A sleeve 1 is fixed on a base. Radial dynamic-pressure generating grooves 1 A and 1 B are provided on an inner surface of the sleeve 1 . A thrust plate 4 hermetically seals a lower opening...
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7088023 |
Motor unit, manufacturing method therefor and recording disk driving apparatus
In a motor unit as an example of the invention, a bearing assembly 5 is securely held on an inner circumferential portion of a hollow cylindrical section 11 a of a first housing member 11 ...
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7072148 |
Apparatus for the sealing of a pivot assembly used in a hard disk drive
A pivot assembly that narrows the gap of the seal member as much as possible and can effectively restrain the diffusion of gas and dirt from the inside, and, moreover, can also solve the problem of...
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7068466 |
Spindle motor for hard disk drives
A spindle motor for use in hard disk drives having a base plate, a stationary shaft, a rotationally driven rotor, and a bearing system rotationally supporting the rotationally driven rotor. The...
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7064923 |
Method and apparatus for mechanically balancing the disk pack of a hard disk drive
The invention includes a method making a balanced disk pack for a hard disk drive, from a disk pack including a spindle motor rigidly coupled, and aligned by at least two open screw holes, with a...
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7057849 |
Data storage device with dampers
A data storage device includes a baseplate ( 10 ), a head stack ( 50 ), a disk stack ( 90 ), a spindle motor ( 80 ) first damper ( 20 ) and second dampers ( 30 ). The head stack is received in the...
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7042125 |
Hydraulic fluid dynamic bearing incorporating an asymmetric journal bearing
A fluid bearing design is provided which according to one aspect includes a shaft defining together with a surrounding sleeve an asymmetric journal bearing, and a thrust bearing at or near an end...
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7042675 |
Hermetically sealed mobile hard disk drive utilizing a base made of a ceramic substrate
Disclosed is a hermetically sealed mobile hard disk drive that combines high storage capacity and performance with low power consumption and portable operation. The key enabling component of the...
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7035044 |
Magnetic disk device having a low-profile motor without deterioration in the strength of the enclosure
A magnetic disk drive includes a base constituting at least a face included in an enclosure; a shaft secured to the base; a rotor which rotates around the shaft as a rotary axis; a stator for...
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7035045 |
Balance clip holder feature on a spindle motor with nickel-teflon coating on balance clips for reducing friction during clip adjustment in balance process
A spindle motor is equipped with pre-installed adjustable balance clips on a stainless steel motor hub to facilitate better balance correction. A balance clip holder feature is formed in the hub...
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7031107 |
Magnetic head parking system of hard disk drive
A magnetic head parking system of a hard disk drive to move a magnetic head mounted on a slider of an actuator from a data zone of a disk and to place the magnetic head in a parking zone thereof...
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7031106 |
Sealing member, rolling bearing, thin motor, and bearing device
The sealing members ( 14 a , 14 b ) comprise a film member produced by forming an aluminum or alumina deposition film on at least one side surface of a film-like core material. One side surface...
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7030527 |
Data storage device with mechanism to control rotation of spindle motor
Embodiments of the present invention effectively control, by a simple structure, floating of a rotor of a fluid dynamic bearing motor mounted in a hard disk drive. In one embodiment, a base is...
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7024755 |
Method balancing a disk pack in a hard disk drive
A method of using a balance clip in a hard disk drive spindle motor for disk pack balance correction provides the balance clip with one end that is offset from the circular shape of the balance...
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