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7614791 |
Bearing unit and motor using the same
A bearing unit wherein a radial bearing for bearing a shaft in the circumferential direction of the shaft and a metallic housing provided with an attaching section are integrated with each other by...
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7600919 |
Motor lubricant cycling system
The invention relates to a motor lubricant cycling system, wherein a plurality of slots are disposed in the inner wall of the shaft tube in contact with the bearing, one end of the slot is...
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7572059 |
Fluid circulating hydrodynamic pressure bearings
A bearing includes a hub to drive recording media; a sleeve to rotatably support the hub to define a hydrodynamic pressure generating space between the hub and the sleeve, the sleeve being formed...
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7563030 |
Method of making fluid dynamic bearing
A method of making a fluid dynamic bearing ( 10 ) includes the flowing steps. At least two bearing parts ( 10 a, 10 b ) are firstly provided. Each of the bearing parts has its shape corresponding...
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7559696 |
Active thrust management system
An active thrust management system varies pressure responsive to changes in rotor assembly thrust to maintain a desired position. The system includes a bearing supporting rotation of a rotor...
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7556433 |
Fluid dynamic bearing device and motor equipped with the same
A fluid dynamic bearing device is mainly composed of a housing, a bearing sleeve, and a rotary member. The housing is formed by a side portion formed through injection molding of a resin material,...
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7553085 |
Fluid bearing and method of operation
A fluid bearing includes hydrostatic pads formed in a surface and positioned to exert a separating force, and a land formed on the surface of the insert and configured to act as a bushing to allow...
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7540664 |
Grooves on both the moving and the stationary mating fluid dynamic bearing surfaces for performance enhancement
A fluid dynamic bearing is provided having a first surface having at least a first groove pattern formed therein; and the second surface having at least a second groove pattern formed therein;...
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7530741 |
Fluid bearing device and spindle motor
A fluid bearing device capable of responding to miniaturization while preventing an operating fluid such as a lubricating oil from leaking out to the outside. The fluid bearing device includes a...
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7527431 |
Bearing unit and rotating apparatus using the bearing unit
A bearing unit and a rotating apparatus which prevent leakage of lubricating oil to the utmost and which are superior in reliability are disclosed. A radial bearing and a thrust bearing support a...
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7521830 |
Fan motor and oil-leak proof bearing system thereof
The invention relates to an oil-leak proof bearing system, and the system includes a bearing, an oil-leak proof cover and a rotor shaft. The center portion of the oil-leak proof cover defines a...
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7520674 |
Magnetic disk device with rotor supported by fluid bearing
Embodiments of the invention make high-speed rotation of a magnetic disk, suppression of an increase in electric power consumption, and suppression in shaft falling vibration compatible together in...
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7513689 |
Hydrodynamic bearing device
A hydrodynamic bearing device is provided for use with a spindle motor. The hydrodynamic bearing device has a sleeve made of a sintered metal that is obtained by sintering a sintering material that...
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7513688 |
Hydrodynamic bearing device and inspection method of amount of working fluid
A hydrodynamic bearing device in a hydrodynamic bearing device in which a sleeve ( 2 ) is covered with a cover ( 5 ), which is capable of easily confirming that a working fluid is favorably filled...
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7510329 |
Bearing unit and rotary drive using the same
A bearing unit ( 90 ) for rotatably supporting a shaft ( 100 ) comprises a seamless holding member ( 120 ) with a gap allowing a shaft to run through and extend to the outside, a bearing ( 130 )...
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7497626 |
Spindle motor structure and hard disk drive employing the same
A spindle motor structure including a spindle motor installed on a base and having a hydrodynamic bearing supporting a shaft to be capable of rotating using hydrodynamic pressure and a driving...
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7495863 |
Hydrodynamic bearing device, and spindle motor and information device using the same
A hydrodynamic bearing device has high reliability and is suitable for miniaturization through superior heat resistance and by utilizing a dynamic pressure-generating liquid with little loss due to...
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7484891 |
Oil film bearing for roll pins having a hydrostatic support
An oil film bearing ( 1 ) for roll pins ( 4 ), which or whose pin bush ( 3 ) that is placed thereon is surrounded by a bearing bush ( 3 ) placed in an insert ( 2 ). The bearing bush has at least...
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7465098 |
Spindle motor having variably grooved radial and thrust bearing with reduced groove angle near bearing entry
A bearing system having variably grooved radial and thrust bearing with reduced groove angle near bearing entry is described. In an embodiment, the bearing system includes a housing. The bearing...
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7465097 |
Fluid dynamic bearing system
The invention relates to a fluid dynamic bearing system particularly to rotatably support a spindle motor to drive the disk(s) of a hard disk drive. The bearing system comprises a bearing sleeve...
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7459416 |
Fluid bearing unit and spindle motor using the same
The present invention provides a fluid bearing unit capable of achieving lower torque and lower current consumption in comparison with a conventional bearing unit, and a spindle motor using the...
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7455456 |
Bearing unit and rotation drive device using the same
A bearing unit ( 90 ) for rotatably supporting a shaft ( 100 ) comprises a seamless holding member ( 120 ) with a gap allowing a shaft to run through and extend to the outside, a bearing ( 130 )...
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7441957 |
Fluid dynamic bearing
A fluid dynamic bearing assembly includes a bearing sleeve ( 30 ) having an inner surface and a rotary shaft ( 30 ) rotatably received in the bearing sleeve. The rotary shaft has an outer surface....
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7435001 |
Hydrodynamic bearing device, method for manufacturing the same, spindle motor and recording and reproduction apparatus
A hydrodynamic bearing device which can improve workability of injecting a lube repellant and effectively prevent leakage of a lubricant, a method for manufacturing the same, a spindle motor, and a...
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7431505 |
Fluid lubrication bearing apparatus
A resin housing 7 is injection-molded by using a forming mold 11 . Moreover, a concave shaped adhesive reservoir 10 is formed by a sink mark of the resin during injection molding on its inner...
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7416341 |
Capillary reservoir for FDB motors
For a motor having fluid dynamic bearing(s) defined by surfaces of relatively rotatable motor members, aspects include providing a capillary reservoir between relatively irrotatable surfaces. The...
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7396164 |
Compensated orifice for use in hydrostatic fluid bearing
A hydrostatic bearing design employing inherently compensated orifices whose geometric design is such that the use of multiple orifices is substantially simplified. In normal cylindrical...
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7374341 |
Hydrodynamic bearing arrangement for an electric motor
The invention relates to a hydrodynamic bearing arrangement for an electric motor, particularly for a spindle motor to drive the platters of a hard disk drive. The bearing arrangement comprises a...
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7374340 |
Fluid dynamic-pressure bearing, spindle motor and recording disk driving device
A fluid dynamic-pressure bearing includes a thrust dynamic-pressure bearing between a bearing member and a rotor hub and a tapered sealing portion continuous with the thrust dynamic-pressure...
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7371010 |
Hydrodynamic bearing device and compact motor including hydrodynamic bearing device
A shaft is rotatably inserted through a bearing hole of a sleeve, a screw hole for fastening a clamp to the shaft is formed along a direction of an axis from an upper end portion of the shaft, an...
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7345844 |
Servo track writer with helium bearing
A servo track writer assembly and method are provided for recording servo pattern information on a disc. The servo track writer assembly includes a spindle assembly, an actuator assembly and a...
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7344002 |
Method and apparatus for filling the bearing gap of a hydrodynamic bearing with a lubricant
A method for filling the bearing gap of a hydrodynamic bearing with a lubricant, where drops of lubricant are produced in a defined manner and are applied to a defined region of the bearing to be...
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7340834 |
Method of lubricating bearings
A method of lubricating a wave bearing comprising application of an oil comprising a perfluoropolyether, derivatized perfluoropolyether, fluorosilicone, polychlorotrifluoroether, or polyphenyl...
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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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7296932 |
Fluid dynamic bearing having an acute-angled shaft recess
A fluid dynamic bearing assembly including a shaft and a bearing sleeve. A bearing gap is formed between the shaft and the bearing sleeve and is filled with a lubricating fluid. A capillary seal is...
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7293917 |
Spindle motor having hydrodynamic pressure bearing
A spindle motor having a hydrodynamic pressure bearing includes a stator, a rotor, and a dynamic pressure generating unit including a sleeve having an upper plate disposed opposite to the rotor and...
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7284908 |
Hydrodynamic bearing device and motor
An object of the present invention to provide a hydrodynamic bearing device and a motor having a high performance and reliability which prevents deterioration in a temperature property due to a...
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7284907 |
Gas bearing system
A gas bearing system comprising two opposing substantially parallel bearing surfaces ( 2, 3 ) and at least one gas duct ( 6 ) for supplying gas through an orifice ( 7 ) to the bearing gap ( 5 )...
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7281851 |
Spindle device utilizing externally pressurized gas bearing assembly
There is provided a spindle device utilizing an externally pressurized gas bearing assembly, in which the center of a pulse disc of a rotary encoder can be adjusted to minimize an unbalance of the...
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7258487 |
Bearing unit, and motor and electronic apparatus having the bearing unit
The bearing unit of the present invention has: a shaft; a radial bearing which supports the shaft in a circumferential direction of the shaft; a thrust bearing which supports an end of the shaft in...
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7226211 |
Shaft for fluid dynamic bearing, fluid dynamic bearing device, and method of manufacturing the shaft
In a method of manufacturing a shaft for the fluid dynamic bearing device, the shaft is formed with a plurality of grooves arranged in and around the external circumference, the surface of the...
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7222861 |
Sealing in a hydraulic turbine unit
System for providing sealing between a rotor and a turbine casing in a hydraulic turbomachine includes a sealing ring arranged in a peripheral region of the rotor. The sealing ring forms at least...
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7207720 |
Static gas bearing system, stage mechanism, exposure apparatus, and device manufacturing method
An apparatus includes a static gas bearing provided upon a first object and configured to form a gas layer between the first object and a second object by use of gas supplied thereto, and to...
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7201516 |
Fluid bearing device
A fluid bearing device capable of preventing a lubricant from scattering outward even during rotation thereof, while holding a relatively large amount of lubricant at a seal surface portion. A...
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7201379 |
Seal assembly, cartridge, and method
A seal assembly and cartridge for sealing a space between a rotating member and a stationary member in which a sleeve extends around the rotating member and with the inner surface of the sleeve...
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7196028 |
Sliding device, fluid dynamic pressure bearing, and motor using the same
The present invention provides sliding members respectively having sliding surfaces opposed to each other for creating dynamic pressure in a fluid, in which the sliding surfaces are formed of...
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7189003 |
Turbomachine
A turbomachine has a rotor shaft, which is mounted in a bearing arrangement containing a hydrodynamic axial bearing, and a rotor disposed on the rotor shaft. A hydrostatic axial bearing is...
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7178983 |
Spindle motor and magnetic disk drive
A rotational member and a stationary member included in a spindle motor provided with air bearings are electrically connected while the bearing is rotating, and abrasion of the rotational member...
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7155825 |
Method of liquid withdrawal from a tool spindle
A method for withdrawing liquid from the liquid bearings of a spindle ( 1 ) carried in liquid bearings ( 3, 5 ) distinguished in that with the help of pressurized gas, the liquid, together with the...
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7153028 |
Hydrodynamic bearing system
The invention relates to a hydrodynamic bearing system particularly for the rotary bearing of spindle motors to drive the platters in hard disk drives which comprises at least one inner bearing...
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