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7582996 |
Dynamic pressure bearing motor
A magnet ( 13 ) for trapping abraded powder is disposed in a connecting passage between an opening of a sleeve and an opening of a hydrodynamic bearing motor, and a shaft ( 3 ), a sleeve ( 4 ), a...
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7550883 |
Rotor hub, spindle motor, and recording disk driving apparatus
A spindle motor according to an embodiment of the invention includes a rotor hub formed of a ferromagnetic material and a rotor magnet held by the rotor hub. The rotor hub has a flange having a...
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7480981 |
Method of producing hard disk drives of reduced size
A method of producing hard disk drives of reduced size including using a one or more MEMS spindle motors, and one or more magnetic heads. Each spindle motor includes a rotor and a stator. The rotor...
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7474501 |
Outer hub assembly and spindle motor including the same in hard disk drive and method for servo-track writing
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...
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7463446 |
Two-plane balance for spindle motors
In a spindle hub configured for rotation about an axis, through holes extend from a first end of the spindle hub to a second end of the spindle hub. The through holes are generally parallel to the...
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7436625 |
Disk drive spindle motor having a cavity defined by one of an upper surface of a stator support structure and a lower surface of a stator tooth
A spindle motor includes a shaft defining a longitudinal axis, a hub, a bearing assembly disposed between the hub and the shaft for allowing the hub to rotate, and a stator. The stator includes an...
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7391139 |
Spindle motor and rotation apparatus
A spindle motor which allows appropriate formation of communicating hole for compensating a pressure difference due to an error in working of dynamic pressure generating grooves and other...
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7375961 |
Rotatable component support assembly for an electronics enclosure
An electronics component support assembly and an electronics system assembly employing the component support assembly are provided. The component support assembly includes a rotatable base support...
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7370407 |
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 receives discs to be stacked, disc pushers which...
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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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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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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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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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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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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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7181824 |
Method of installing a disk clamp over a hub of a disk drive
A disk clamp is provided for securing one or more data storage disks to a disk drive without the need for screws. A preloading device is also provided for installing the disk clamp and removing the...
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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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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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7130151 |
Disk device and unbalance correcting method thereof
In a disk device, having disks 2 and a hub 4 for holding thereof, to be attached onto a shaft 5 of a spindle motor, for rotary drive thereof, a groove 42 is formed on a bottom surface of a...
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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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7109623 |
Motor and electrically-driven fan employing the same
An electrically-driven fan 1 comprises a base portion 2 ; a bearing portion 11 ; a stator 13 including iron core portions 15 and coils 16 ; a rotor 4 including a rotary shaft 20 and a...
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7092203 |
Method of manufacturing a fluid dynamic bearing applicable to a disk drive that includes welding a cover member to a cylindrical wall of a shaft base
A method of manufacturing a fluid dynamic bearing in which a stopper is fixed by welding. The bearing comprises a hub, a shaft erected on the hub, a sleeve, a cylindrical wall erected on the hub,...
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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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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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6979923 |
Motor having dynamic pressure fluid bearing and disc drive apparatus provided with the motor
A motor ( 100 ) having a dynamic pressure fluid bearing is composed of a hub ( 2 ), a rotor ( 4 ) provided with a shaft ( 7 ) of which one end portion is securely fastened by the hub ( 2 ) and...
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6961210 |
Data storage device with a low profile spindle motor
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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6940193 |
Spindle motor with an electro-conductive connection between the bearing system and the baseplate or flange
Permanent electro-conductive connection is achieved between a bearing component and a baseplate/flange by providing at least one solid-state contact element between the baseplate/flange and the...
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RE38772 |
Disk storage device having an undercut hub member
A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical...
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6912775 |
Assembly device for assembling components
An apparatus for assembling components of a data storage system. Assembly components are housed by a component storage member removably coupled to the frame of the apparatus for supporting a...
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6839956 |
Method for assembling disc apparatus
An object of the invention is to provide a method of assembling a disc which can reduce an unbalance of a rotating portion. The method of assembling a disc-like recording medium has a first step of...
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RE38673 |
Disk storage device having a hub sealing member feature
A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical...
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RE38662 |
Disk storage device having a sealed bearing tube
A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical...
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6822825 |
Stiffness compensation for a thermally compensated fluid dynamic bearing
The present invention provides a hydrodynamic bearing design which is simple and reliable in design, while incorporating a shaft with a plug of high elastic modulus material fitted within a...
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6819526 |
Holding member for information storage disk and information storage disk drive device
An information storage disk holding member for holding an information storage disk in position in an information storage disk drive device, the holding member being made of glass-ceramics in which...
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6815850 |
Flux leakage barrier in fluid bearing for disk drive
A spindle design for a hard disk drive assembly constructed in accordance with the present invention includes a significantly large gap between the rotating, ferromagnetic hub with its permanent...
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6812603 |
Flat motor
A flat motor is composed of a rotor 1 provided with a driving magnet 3 in a ring shape and a shaft 8 , and a stator 5 . The stator 1 is composed of a stator yoke 6 provided with a bearing...
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RE38601 |
Disk storage device having a radial magnetic yoke feature
A disk memory drive includes a brushless drive outer rotor motor having an internal space and a stator with windings. The outer rotor coaxially encircles the stator and a substantially cylindrical...
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6787954 |
Spindle motor
A downsized spindle motor of excellent abrasion and shock resistance is provided. A shaft is fit into a sleeve. A flange is fixed to an end of the shaft. A radial bearing is formed on faces of the...
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6774520 |
Thin inner rotor motor and disk device using the motor
An inner rotor motor includes a rotor which has a plurality of circumferentially arranged magnetic poles and a stator which is positioned outside a circumference of the rotor and has a stator core...
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6745946 |
Device for scanning an electromagnetically suspended information carrier
A device for reading and/or writing a disc-shaped information carrier which comprises a support element of a magnetizable material along its circumference. An electromagnetic unit cooperates with...
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6731456 |
Fluid dynamic bearing thermal compensation
A hub and shaft are provided which are mounted for relative rotation by providing two conical bearings spaced apart along the shaft, and a bearing seat facing each conical bearing. Fluid is...
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6679501 |
Motor with stationary shaft and high speed capillary seal
A motor or bearing which incorporates the use of a capillary seal adjacent a bearing race between the shaft and surrounding hub or housing. The seal may take a plurality of forms, including a...
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6678114 |
Disc biasing scheme to minimize single plane unbalance for hard disc drives
A method for minimizing unbalance in the disc pack of a disc drive where the unbalance of the spindle motor is quantified and incorporated into the biasing assembly of the disc pack. In the...
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6664686 |
Motor having single cone air dynamic bearing balanced with shaft end magnetic attraction
A single cone air dynamic bearing motor, including a shaft having a diminishing conical taper surface, a sleeve having a concavity opposite the shaft, and magnetic members to generate magnetic...
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6629359 |
Device for assembling base and main board assembly for hard disk drive
Disclosed is a device for assembling a device including a base and a main board assembly in a hard disk drive including an actuator having a magnetic head; a base having a spindle motor mounted...
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6597531 |
Low-profile magnetic disk drive
A magnetic disk drive is provided, which decreases the profile or height of the drive itself without reliability degradation, realizing a low-profile and large-capacity magnetic disk drive. The...
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