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7023116 |
Small brushless motor
A brushless motor includes a highly reliable thrust-receiving member that simplifies the machining and assembling of parts and prevents deformation of the bearing and leakage of lubricating oil. A...
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7016146 |
Low power spindle motor with a fluid dynamic spool bearing
A spindle motor for use in a disk drive including a shaft and a bearing sleeve. The shaft has a larger diameter section and a smaller diameter section with a step formed therebetween. The bearing...
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7005768 |
Dynamic bearing device, producing method thereof, and motor using the same
A securing surface of a housing comprises a deformation region, which deforms radially outward by a predetermined quantity during press fitting of a thrust member, and another region. The...
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7000309 |
Method of assembling a disk drive by electrically grounding a disk drive cover
A method of assembling a disk drive includes providing a disk drive base. The method further includes providing a disk drive cover having an inside face and an outside face. The inside face is...
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7002268 |
Spindle motor
A spindle motor adapted to be loaded with a disk provided with an attracted plate and to rotate the disk is provided which comprises a turn table having a flange portion on a front surface of which...
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6982850 |
Method of manufacturing a base plate
A method for forming a base plate in which the base plate is stamped out of a sheet of metal. One of a relief surface and a boss are formed in the base plate by press working the base plate.
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6982510 |
Low profile fluid dynamic bearing
The design comprises a shaft and sleeve supported for relative rotation by a journal type fluid dynamic bearing utilizing grooves on one of the shaft or sleeve surfaces. A grooved pattern of a...
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6980393 |
Low power spindle motor with a fluid dynamic thrust bearing having a reduced outer diameter
A spindle motor for use in a disk drive having a rotor assembly and a stator assembly. The rotor assembly has a hub and a rotating shaft with an outer diameter, the hub being mounted for rotation...
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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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6980394 |
Spindle motor and recording disk driving device comprising the same
In the present invention, to reduce the noise of a spindle motor, a bush member is interposed between a base plate and an FDB unit. The base plate is a base of the spindle motor and of which a case...
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6979931 |
Spindle motor having spindle motor stator with laminate layers for increased head stack assembly access
A spindle motor for use in a disk drive having a rotatable head stack assembly. The spindle motor has a spindle motor hub. The spindle motor further has a magnet radially attached about the spindle...
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6975484 |
Selectively stiff FDB bearing for better servo write
Hard disk drive track density is increased by selectively increasing the stiffness of a fluid dynamic bearing (FDB) motor during servo write. Applying a load to the shaft of a fixed shaft FDB motor...
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6968422 |
Disk drive employing a modified rotational position optimization algorithm to account for external vibrations
A disk drive is disclosed which executes a rotational position optimization (RPO) algorithm to select a next command to execute from a command queue relative to an estimated access time. If an...
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6965493 |
Hydrodynamic pressure bearing system and spindle motor using the same
A shaft secured to a hub is inserted and rotatably supported in a sleeve secured to a base. A dynamic pressure groove is formed in the inner peripheral surface of the sleeve, and lubricant is...
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6965492 |
Rotor assembly, information-recording/-reproducing device using the rotor assembly and method of assembling the rotor assembly
An information-recording/-reproducing device comprises a rotor assembly formed of a disc portion having information recording layer provided on the main surface and an axle portion, the disc...
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6963149 |
Radial winding stator structure for single phase motor
A radial winding stator structure for a single phase motor is composed of plural silicon steel sheets that are stacked together and have the same structure. Each of the silicon steel sheets...
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6961212 |
Shock isolation bearings and travel limit gaps in a spindle motor and disk drive using the same
Disclosed herein are disk drive spindle motors and disk drives using same that include one of more structures that function as travel limit stops that are designed to transfer the load created by a...
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6961213 |
Disk drive spindle motor having hydrodynamic bearing working surface with low friction layer formed on wear resistant layer
A disc drive storage system including a housing having a central axis, a stationary member that is fixed with respect to the housing and coaxial with the central axis, and a rotatable member that...
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6961214 |
Refinement of spindle motor bearing gap
A method and system is provided for achieving good dynamic performance and negligible wear to spindle motor components. In an aspect, a disc drive storage system is provided having a hydro bearing...
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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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6952324 |
Hydrodynamic fluid bearing containing lubricants with reduced temperature sensitivity for disk drive application
A disc drive storage system including a housing having a central axis, a stationary member that is fixed with respect to the housing and coaxial with the central axis, and a rotatable member that...
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6950276 |
Disk drive motor and disk drive storage device incorporating same
A disk drive comprising a rotor, to which a disk and a plurality of magnets are fixed, and an open-slot type integrally molded stator disposed about an outer periphery of the magnets, and wherein...
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6947253 |
Method for balancing a rotating assembly using eccentric rings
A method for balancing a spindle assembly for compensating for dynamic imbalance of the spindle assembly. The method uses a plurality of adjustable eccentric rings for dynamically balancing the...
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6943985 |
Spindle motor and hard disk drive
A spindle motor for a hard disk drive having a stationary component with a first bearing surface, and a rotating component with a second bearing surface located in opposing relationship with the...
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6943984 |
Magnetic disc apparatus having stator structure with reduced distortion
An object of the invention is to inhibit a turning force of a magnetic disc apparatus from being reduced. In order to achieve the object, there is provided a magnetic disc apparatus having a rotor...
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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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6936944 |
Spindle motor for hard disk drives
Disclosed is a spindle motor for hard disk drives capable of generating mechanical and electrical preloads to form a predetermined sized air gap through use of mechanical and electrical offsets, so...
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6936940 |
Motor with resin base plate
A motor includes a stator and a rotor having drive permanent magnets and a rotary shaft. The stator supports a core with coils wound thereon and includes a base plate. The base plate is formed with...
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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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6922309 |
Spindle motor and information recording and/or reproducing apparatus having this spindle motor
A spindle motor that can be reduced in size and thickness and yet develops a high rotational torque, and an information recording and/or reproducing apparatus employing this spindle motor. A rotor...
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6920012 |
Magnetic wear debris collector for air bearing of a spindle motor in a hard disk drive
A method and apparatus for providing magnetic wear debris collection for an air bearing of a spindle motor in a hard disk drive is disclosed. A magnetic ring is provided near one end of the journal...
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6919657 |
Combination structure of a motor
A combination structure of a motor has a base board, a printed circuit board and at least one sensing unit. The base board is used for placing a stator and a rotor and has at least one first...
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6920013 |
Disk drive spindle motor with radial inward thrust area annular protruding portion and bearing member communicating passage
In a spindle motor utilizing dynamic-pressure bearings having a full-fill structure, a bearing configuration that balances and sustains at or above atmospheric pressure the internal pressure of the...
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6915557 |
Method of assembling rotor structure
A method of assembling a rotor structure for a spindle motor for use in an information recording and playback apparatus is provided in which pollution of the recording medium due to gases emitted...
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6914747 |
Disk drive having electrostatic discharge path defined between disk assembly and base
In a first aspect, a disk drive includes a base and a disk assembly, including at least one data storage disk, rotatably mounted on the base. The disk drive further includes structure for defining...
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6914358 |
Spindle motor and disk drive furnished therewith
In a spindle motor utilizing dynamic-pressure bearings having a full-fill structure, a bearing configuration that balances and sustains at or above atmospheric pressure the internal pressure of the...
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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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6906892 |
Mechanism and method for positioning data cartridge in disk drive
A data storage cartridge is positioned in a disk drive. The cartridge is positioned in the X and Y dimensions by contact between an alignment opening in the cartridge and an XY alignment pin in the...
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6900961 |
Disk drive having a head disk assembly enclosure including insert molded components
Disclosed is disk drive having a molded head disk assembly enclosure including insert molded components and methods for manufacturing the same. In one aspect, the invention may be regarded as a...
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6898051 |
Disc drive spindle motor having a damper on a bottom surface of the spindle motor
A disc drive assembly includes a magnetic disc mounted on a hub of a spindle motor. The spindle motor includes a base portion supporting the hub for rotation about a spindle axis. A bottom surface...
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6897586 |
Axial tube assembly of a motor
An axial tube assembly of a motor includes an axial tube around which a stator assembly is mounted, an engaging member, and a sleeve in which a bearing is mounted. The engaging member includes a...
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6898052 |
Spindle motor including magnetic element for pre-loading a ball bearing set
A spindle motor for use in a disk drive includes a spindle motor base and a motor shaft. The motor shaft has a central axis. The spindle motor includes a spindle motor hub rotatably coupled to the...
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6898050 |
Hydrodynamic bearing motor having a molded plastic hub
A single plate hydrodynamic bearing motor comprising an integrated hub and shaft assembly. The hub is formed of molded plastic and at least one disk is affixed to the hub.
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6888278 |
Spindle motor and disk drive utilizing the spindle motor
Low-profile spindle motor whose entire shaft length is utilized to configure, along an encompassing sleeve, a radial dynamic-pressure bearing section. One end of the shaft is unitary with the...
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6876114 |
Apparatus for reducing spindle motor magnetic drag
A magnetic flux shield extending substantially the entire width of a magnetic disk drive spindle motor magnet is mounted between the magnet and the disk drive's base frame and rotates with the...
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6867946 |
Disk drive employing a spindle motor comprising a locking spring arm disengaged through stator coil flux
A disk drive is disclosed comprising a disk, a head actuated radially over the disk, and a spindle motor for rotating the disk. The spindle motor comprises a stator having at least one stator coil...
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6856485 |
Biased retaining ring for disc drive
A disc drive having a pivot cartridge and an actuator assembly. The actuator assembly consists of an actuator body which has a bore therein to receive the pivot cartridge. The actuator body further...
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6850388 |
Apparatus and method for forming a magnetic fluid seal
Embodiments of the invention generally provide an apparatus and method for, sealing an outer surface of a shaft to an inner surface of a hub. In one embodiment, the invention provides a magnetic...
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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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6831812 |
Method of manufacturing a thrust plate, method of manufacturing a shaft for a hydrodynamic bearing, hydrodynamic bearing, spindle moto
A method of manufacturing a thrust plate for a dynamic pressure bearing in which the upper and lower end surfaces thereof have a highly precise perpendicular angle relative to the central axis...
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