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8184396 |
Disk drive device with hub having a rotational frequency of axial run-out smaller than 0.1 μm for improved shock resistance
The disk drive device includes a base plate, a hub on which a recording disk is mounted, a shaft bearing unit that is arranged on the base plate and that rotatably supports the hub, and a spindle...
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8149535 |
Magnetic and encapsulation contamination control for disk drives
A disk device with disk contamination control having a spindle for rotating at least one disk. A spindle hub located on the spindle. A disk clamp for clamping the at least one disk on the hub. A...
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8139317 |
Disk drive device which includes a clamping magnet for attracting a disk
The present invention provides a disk drive device that can appropriately clamp a disk by means of magnetic force even when the disk drive device is very small. A clamping magnet 16 on which a disk...
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8116030 |
Locating feature for mounting a component to a base
The present disclosure provides an apparatus for mounting an object to a base. In one example, the apparatus includes a base and a protuberant feature extending from the base. The protuberant...
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8102173 |
Thermal control system for test slot of test rack for disk drive testing system with thermoelectric device and a cooling conduit
A disk drive test slot thermal control system includes a test slot including a housing having an outer surface, an internal cavity defined by the housing and including a test compartment for...
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8094410 |
Spindle motor with flange land portion for ensuring flatness of recording disc
A spindle motor rotatably drives recording discs, and includes a base plate, a stator, a rotor hub, a yoke, a rotor magnet, and a hydrodynamic bearing. The hub includes a disc support cylindrical...
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8077432 |
Disk stack assembly with spindle motor hub having improved disk-supporting flange
An improved disk stack assembly for a hard disk drive (HDD) includes a generally cylindrical hub with flange having a downward sloping conical flange surface. The conical flange surface is defined...
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8056097 |
Disk recording and/or reproducing apparatus
There is provided a disk recording and/or reproducing apparatus including: a disk mounting part; a clamp member holding a disk-shaped recording medium between the clamp member and the disk mounting...
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8035918 |
Spindle motor hub, disk pack, and hard disk drive having the same
A spindle motor includes a spindle motor hub that supports one or more disks, and has a contact area reduction portion that minimizes the area of contact between the hub and a disk when the disk is...
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8035917 |
Disk device having hub with engaging groove
A disk device is presented that includes a drive motor which has a rotatable hub fitted with a recording medium and rotates the recording medium, and a disk-shaped clamper attached to the hub to...
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7936535 |
Data storage disc carriers
A data storage disc carrier (1) for carrying discs (10). The carrier includes an axial clamping mechanism which incorporates a three legged resilient clamping member (7) that can flees between...
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7933093 |
Spindle motor, and recording and reproducing apparatus equipped with the same
The spindle motor comprises a shaft, a rotor, and a medium-carrying surface. The rotor is disposed on the outer peripheral side of the shaft, and rotates about the shaft. The medium-carrying...
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7908739 |
Motor assembly and method of manufacturing thereof
In a manufacturing method, energy beam heat is radiated to a target area of the motor assembly which is used for a storage disk drive. By radiating energy beam thereto, a portion of the motor...
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7872830 |
Magnetic medium stack assembly for a data storage and retrieval system
A magnetic medium stack assembly includes a hub, a magnetic medium, and a clamp fixing the magnetic medium to the hub. The hub and clamp include engaging flange members that enable the hub and...
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7855852 |
Clamping system for a data storage device
A clamping system includes a stack of storage media discs that includes an annular outer disc surface. A clamp includes a clamp surface that faces the outer disc surface. A ring is disposed between...
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7823270 |
Clamp or clamp assembly having a low profile
A clamp including an inverted spring portion and a plurality of tabs about a circumference of an inner portion of the clamp. The inverted spring portion of the clamp is insertable into a groove of...
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7796358 |
Method and apparatus for eliminating spike noise in a soft magnetic underlayer
A system for reducing spike noise in a perpendicular recording medium having a soft underlayer is provided. The system radially biases the soft underlayer to substantially eliminate domain walls...
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7787214 |
Disk device
A disk apparatus includes a hub having a disk inserting portion having a cylindrical plane in the outer part of one end and a disk receiving portion having a flat part and being pivotably...
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7773339 |
Method and apparatus for a disk clamp used in a hard disk drive that reduces mechanical deformation on at least one disk from tightened screws through the disk clamp
Disk clamp including a disk clamp base and a disk clamp platform. Disk pack including at least one disk coupled between disk clamp and spindle motor. Hard disk drive including disk pack mounted on...
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7768740 |
Apparatus and method for attaching a disk to a spindle of a spinstand
Apparatus for attaching a disk to a spindle of a spinstand includes a spindle having a fluid pressure port therethrough for delivery of fluid pressure. A spindle adapter is adapted to be attached...
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7715146 |
Self-centering clamp
An apparatus and associated method for clamping an article to a rotatable motor hub. A clamp has a web portion and a plurality of protuberant members extending away from the web portion. Distal...
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7684152 |
Method of mitigating eccentricity in a disk drive with DTR media
A disk drive with DTR media and method of assembly is described. The method may include aligning a discrete track recording (DTR) track pattern center on a DTR disk with a rotational center of a...
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7684183 |
Impact buffer, impact buffering device, and information processor having impact buffering device
An impact buffer having a high buffering effect includes two or more impact buffering members with different hardness, contacted with at least one surface of a side surface part of an HDD unit...
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7663837 |
Rotor blade and hard disk drive having the same
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...
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7630171 |
Hard disk drive having a balance weight to compensate for an imbalance in the disk stack assembly
A hard disk drive comprising balance weight integrally coupled to a clamp is provided. The hard disk drive comprises a disk stack assembly comprising a disk, a spindle motor comprising a rotational...
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7602583 |
Disc clamping device and disc drive having the same
A clamping device that fixes a disc onto a spindle motor that rotates the disc includes a clamp ring that is layered on the disc, and a screw that fixes the clamp ring onto the spindle motor, and...
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7589935 |
Disk clamping apparatus for hard disk drive and hard disk drive with the same
A disk clamping apparatus and method for securing a data storage disk to a spindle motor of a hard disk drive. The disk clamping apparatus includes a flange formed on an outer periphery of a hub of...
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7584631 |
Member for supporting magnetic disc substrates, process of producing the same, and magnetic disc device using the same
A member of supporting magnetic disc substrates is provided, comprising a ceramic sinter containing a ceramic component and at least one conductive component selected from a group consisting of...
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7573674 |
Storage disk having increased damping characteristics in a disk drive
A disk drive includes a drive housing and a storage disk rotatably coupled to the drive housing. In one embodiment, the storage disk includes a first substrate, a spaced-apart second substrate, a...
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7561376 |
Servo track writer and a chuck thereof
A servo track writer and a chuck thereof which are capable of maintaining a central axis of a disk hub to be aligned with a rotating axis of a spindle motor adapted to rotate the disk hub, thereby...
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7561377 |
Disk drive disk clamping via a hub flange, a clamp, and an O-ring
Embodiments of the invention provide a small, thin, yet reliable magnetic disk drive. In one embodiment, a magnetic disk drive comprises: a motor hub including a disk support portion and a flange...
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7511920 |
Hard disk and spindle motor assembly
A spindle motor assembly includes a spindle motor having a shaft and a hub that rotates on the shaft, and a hard disk having a data storage medium mounted in the form of a whole disk, and a...
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7511919 |
Magnetic disk apparatus
A magnetic disk apparatus capable of reducing deformation of a magnetic disk is disclosed. The magnetic disk apparatus comprises a magnetic disk on which data is recorded while the disk is driven,...
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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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7446973 |
Disk and clamp assembly
A clamp includes a disk and a clamp engaging the disk, wherein the clamp has protrusions that bite into a surface of the disk. A disk and clamp assembly includes a disk having receiving areas...
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7436626 |
Clamp assembly for a data storage device with a lubricant trap to prevent lubricant migration from mounting screws
An embodiment of the invention clamp assembly for a disk which includes a cavity for trapping the excess lubricant which migrates from the load bearing threads of the screws that hold the assembly...
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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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7379267 |
Disc clamp with snap fit for a disc drive
The invention relates to a disc clamp for mounting an information storage disc to a rotating hub of a spindle motor assembly, and a disc drive spindle hub assembly comprising said disc clamp. The...
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7363641 |
Aligning device, for a disk recording medium, having a sliding portion disposed between the medium and turntable guide portion
An aligning device for a disk recording medium capable of reducing eccentricity using a simple structure, without an increase in cost, is provided. An aligning member has a tapered portion that...
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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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7310201 |
Composite disk clamp assembly with lower layer fixedly coupled to upper layer of smaller diameter
A composite ring for coupling a disk to a spindle includes a upper layer constructed of a material having a hardness at least as hard as a primary material of the disk. A lower layer is fixedly...
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7295002 |
Vacuum chuck spinstand for testing magnetic heads and disks
A spinstand having a vacuum chuck clamping mechanism for securing magnetic discs includes a cap (9) and a base (10). A disk-to-be-clamped is held between the cap (9) and the base (10). Vacuum,...
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7256961 |
Damped spindle motor flange for the disk pack in a hard disk drive
The present invention includes a spindle motor with a dampened spindle motor flange, which includes a shallow groove on the disk face. The shallow groove includes a first rim, a trough, and a...
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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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7215509 |
Pop-on disc clamp for a data storage device
Steps for clamping storage media to a motor hub to form a data storage device include; securing the disc clamp with a mounting tool, which subsequently expands a central mounting aperture of the...
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7212377 |
Disk drive having apertures near the ID of a disk stack for allowing airflow to pass through the apertures to reduce disk flutter
A disk drive includes a disk clamp for clamping a plurality of disks to a spindle motor, and a disk spacer positioned between first and second disks. The first disk has a plurality of first disk...
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7209320 |
Offset angle disc clamp
A disc assembly in a disc drive includes a hub rotatable about a central axis. Pluralities of disc elements are mounted about outer periphery of the central axis of the hub. An annular shaped disc...
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7196869 |
Plastic spacer and disk clamp assembly
An assembly for coupling a disk to a spindle includes an annular spacer ring adapted to engage the disk and an annular clamp. The spacer ring is constructed at least in part of a plastic material....
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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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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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