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5471357 |
Magnetic disk drive device having a liquid insulating material provided in different thicknesses on an iron core
A multi-layered insulating film of different thicknesses and which is easily formed on an iron core of the multipole structure in a magnetic disk drive device. The thickness of the insulating film...
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5469425 |
Method of manufacturing an index apparatus
A method of manufacturing an index apparatus includes thermally transferring a hot stamped section having a low light reflectance onto an outer peripheral surface of a magnet of a frequency...
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5463511 |
Spindle unit having pre-load mechanism
A rotor magnet is attached to the inner peripheral portion of a hub to attach a magnetic disk or the like and a stator is provided in the outer peripheral portion of a bearing housing so as to face...
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5461523 |
Disc unit having a drive motor and a chucking assembly for holding a disc therewith
A disc unit includes a control circuit board engaged with a base body of the disc unit, and a shield cover for noise shielding. The shield cover is also used for preventing the separation of...
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5459628 |
Disk drive with profiled attachment of a spindle and hub
A technique for joining a hub and a spindle of a disk drive is disclosed wherein the hub and spindle are joined by an interference fit. The interface between the hub and the spindle is provided...
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5457588 |
Low profile hydrodynamic motor having minimum leakage properties
A spindle motor comprises a rotary sleeve; a rotor hub which is integrally rotated with the rotary sleeve; a stationary sleeve; and a stationary support extending upwardly from the stationary part,...
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5452156 |
Spindle motor with combined pressure relief and adhesive carrying annular recesses
A spindle motor, a hub member for carrying a recording disk(s) thereon, a shaft member fixedly mounted to the hub member, and a bracket member rotatably supporting the shaft member. A pair of...
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5450260 |
Space saving support mechanism for an eccentric drive pin in a rotating disk storage apparatus
A disk drive with a turntable for supporting a flexible magnetic disk thereon has a spindle extending centrally through the turntable for engaging a first opening formed centrally in a sheet metal...
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5450261 |
Magnetic disc drive motor having disc securely fixed to loading surface to abut upper bearing outer ring
A magnetic disc drive motor is provided. It includes a frame, a fixed shaft mounted on the frame upper and lower ball bearings. Inner rings of the upper and lower ball bearings are mounted on the...
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5446610 |
Disk storage device having a brushless DC drive motor
A disk storage device having a clean chamber for a storage disk having a central opening is provided with a brushless drive motor. The drive motor includes a stator and a winding on the stator and...
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5444586 |
Removable cartridge for a disk drive with a 1.8 inch form factor
A removable cartridge 200 for a disk drive 30 which has a 1.8 inch form factor, has multifunction features which allow for high data storage capacity at a reduced size. The cartridge 200 includes a...
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5434730 |
Spindle motor and recording medium assembly
A spindle motor and recording medium assembly having a rotary shaft, and a rotary portion. The rotary portion includes a recording medium, a fixing member, a boss, and rotating motor elements...
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5434729 |
Magnetic disc driving motor
A magnetic disc driving motor comprises a hub for mounting a magnetic disc thereon, a motor stator for driving the hub rotationally, and a motor rotor formed in the hub and arranged to face the...
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5432644 |
Disk drive unit having motor components in a compact arrangement
A motor has a stator and a rotor, the stator having cores and drive coils which generate magnetic fields for rotating the rotor. The stator also has a yoke surrounding the rotor and the rotor is...
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5430589 |
Computer disk drive unit having vibration absorbing isolator disposed between the housing cover and the memory storage unit
A computer disk drive unit includes a housing having a lower base and an upper removable cover which define a disk storage compartment therebetween. A shaft fixed to the lower base supports a...
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5430590 |
Spindle system for a disk drive
A spindle system is comprised or a journal and thrust air bearing. The journal bearing; has two sets of opposing groove areas. The thrust air bearing has two sets of spiral grooves. The thrust air...
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5422769 |
Spin motor for rotating a storage disk in a disk drive
A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical...
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5416655 |
Magnetic disk apparatus having a motor driven disk clamp
A magnetic disk apparatus has a sealed up space between a base plate and its cover. A magnetic disk with its spindle motor for driving the magnetic disk, and magnetic heads with respective...
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5412522 |
Portable low profile information storage system
Disclosed is a low profile information storage system including a low profile information storage cartridge having a housing consisting of a base and a cover defining a sealed chamber with one or...
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5408374 |
Miniature hard disk drive with spin motor for portable computer
Disclosed is a disk drive information storage device which, in one embodiment, includes a disk having a diameter in the range of about 45 to 50 min., with a housing and a spin motor. In another...
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5400191 |
Electronic index pulse generating system for speed control in rotating disk data storage apparatus
An index pulse generating system utilizes two periodic motor speed signals, one generated by a speed sensor coil actuated upon by a permanent magnet rotor mounted to a turntable, and the other...
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5400197 |
Disc drive spindle motor
A low profile fixed shaft disc drive motor with separate disc mounting and motor sections. The motor is ball staked to a cup shaped piece of sheet metal, which is in turn screwed onto the casing of...
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5394284 |
Direct access storage device having a stable ball bearing cage design
The instability of a cage in a precision ball bearing at high speeds may be eliminated by controlling the position of the cage. The control of a position of a cage is accomplished by forming three...
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5394283 |
Disk storage drive having a rotor mounted with a plurality of bearing
A disk memory drive is presented having a stator and a rotor that is equipped with a centered hub, which hub has a surface onto which one or several hard disks are mountable. The bearing system...
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5392178 |
Motor for a disc driving device having a hub positioned on inner race of an upper bearing
A motor for a disc driving device having a single straight shaft for rotating a magnetic disc mounted on a hub press-fitted to the single shaft. The single straight shaft is prevented from being...
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5392176 |
Recording/reproducing device employing device housing and printed circuit board and electronics as structural and functional part of media drive motor and the media drive motor
A disk drive in which the disk spindle motor for a rotatable recording/reproducing media has a printed circuit stator winding on a printed circuit board within the disk drive housing, fitted...
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5388094 |
Turntable brake for a disc player
The present invention relates to a turntable brake for a disc player capable of preventing a turntable from rotating when a disc is improperly loaded on the turntable. In accordance with the...
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5379169 |
Magnetic disk drive spindle motor having plates to shield the motor enclosed space from the oustside
A magnetic disk drive spindle motor includes a cylindrical spindle hub, a pair of cylindrical bearings, cylindrical bearing holders, a shaft, a housing, and dynamic pressure generating plates. The...
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5373407 |
Disk drive spindle motor
A small form factor disk drive having an extremely thin, high-energy product annular magnet within the spindle motor. The magnet includes twelve alternating poles disposed about the periphery and...
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5367416 |
Spindle grounding device using magnetic fluid
The hub includes a cup attached to the hub or rotating portion of the disk drive. The cup has a top. Both the cup and top have openings therein which accommodate the fixed shaft. The cup is filled...
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5365388 |
Disk drive constructed to isolate motor vibration
A disk drive has a stator positioner disposed on a shoulder of a drive shaft housing which is part of the spicule. The positioner secures the stator against movement and references the motor to the...
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5337374 |
Disk drive apparatus
A disk drive apparatus having a thick and simple structure with manufactured at low cost, and a bearing device having a thick structure, whose shaft deflection is small, and which is high in...
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5333079 |
Low profile hard disk apparatus
An annular recess is formed in a base which constitutes a disk chamber, and an armature constituting a spindle motor for driving a hard disk and composed of a stator core and a stator coil and a...
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5325004 |
Motor
A spindle motor includes a housing, a shaft member fixed in the housing, a rotor rotatably supported on the shaft member, a rotor magnet mounted on the rotor, and a stator placed facing with the...
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5315467 |
Head actuator pivoting around stationary shaft and dish having such head actuator
A head actuator has a shaft fixed on a base and a head supporting member, to which a head is attached, pivotably supported around the shaft. Because the shaft does not pivot with the head...
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5315464 |
Disk apparatus and manufacturing method thereof
Disclosed is a disk drive for storing representations of data. The disk drive includes a housing or enclosure. At least one disk is rotatably attached to the housing. Also attached to the housing...
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5304879 |
Outer rotor motor
In an outer rotor motor (1): a hub base (3) is in a center of an upper side of the motor (1); a chucking magnet (16) for carrying a disk is near the hub base (3); a spindle (4) is fixed to a...
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5305163 |
Stationary angularly aligned stationary spindle shaft
A stationary spindle shaft assembly supports and controllably rotates a disc pack within the housing of a magnetic disc drive. The shaft assembly includes an elongate spindle shaft fixed with...
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5296981 |
Disk drive apparatus
A disk drive apparatus includes a magnetic disk, a spindle motor for rotating the magnetic disk, a magnetic head for writing data on and/or reading out data from the magnetic disk, a support arm...
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5295029 |
Disk drive including unitary deck for aligning and supporting axially retractable spindle assembly
A disk drive assembly includes a disk pack with an axially retractable spindle assembly, along with a rotary actuator, mounted within a unitary deck and precision aligned by bores through spaced...
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5295028 |
Spindle assembly with labyrinth seals and hub/back iron spacers
A disk drive assembly includes a disk pack with an axially retractable spindle assembly and a rotary actuator, mounted within a unitary deck and precision aligned by bores through spaced apart...
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5291355 |
Micro miniature hard disk drive
A hard disk drive for a computer system including a head disk assembly with a disk platter of approximately one-and-eight-tenths-inch in diameter capable of storing more than forty megabytes. In an...
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5291357 |
Magnetic recording device having reduced electromagnetic interference
A magnetic recording device exhibiting reduced electromagnetic interference has a magnetic recording medium, a spindle motor for rotationally driving the magnetic recording medium, a magnetic head...
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5280465 |
Fluid drive system for a rotating medium
A drive system for rotating a disk includes a housing having a planar element with a working surface which includes a spindle which facilitates rotational movement of the disk relative to the drive...
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5274288 |
Low noise spin motor for use in disk drive
A low noise spin motor for use in a disk drive includes two bearings having different inside diameters, different outside diameters, and preferably the same size balls. The balls in the larger...
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5264978 |
Support mechanism for an eccentric drive pin in rotating disk data storage apparatus
A disk drive of the kind having a turntable for supporting a flexible magnetic disk thereon, a spindle extending centrally through the turntable for centering engagement in a first opening formed...
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RE34412 |
Disk storage drive having motor drive with non-corrodible hub
A disk storage drive is provided with a brushless drive motor having a stator with a winding. An external rotor coaxially surrounds the stator and is spaced therefrom by a substantially cylindrical...
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5251082 |
Miniaturized disk file pluggable into a card terminal
A disk/file for magnetic recording having overall dimensions of one quarter inch thick by about the size of a standard credit card with pin connectors for connecting into a receptacle such as for...
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5251081 |
Spindle grounding device
Disclosed is a disk drive having an enclosure for housing one or more disks, an actuator arm and sliders attached to the actuator arm. The sliders include magnetic transducers for reading...
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5247409 |
Disk drive pin support mechanism in a rotating disk data storage apparatus
A disk drive for use with a flexible magnetic disk having a sheet metal hub having a central hole and an eccentric slot formed therein. The disk drive has a turntable on which the disk is to be...
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