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7626296 |
Bearing unit and motor using bearing unit
A bearing unit includes a radial bearing; a thrust bearing; a path forming member; a housing; viscous fluid; and a communicating path. The communicating path has an axial path formed in the axis...
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7625125 |
Spindle motor
The invention relates to a spindle motor having a fluid dynamic bearing system used particularly for driving the storage disks of hard disk drives, having a baseplate, a stationary bearing bush...
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7625124 |
Fluid bearing device
While applying an ultrasonic vibration to a housing 7 and/or a bearing sleeve 8 , the outer peripheral surface 8 d of the bearing sleeve 8 is press-fitted into the inner peripheral surface ...
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7625123 |
Hydrodynamic bearing device and spindle motor that makes use of same
A hydrodynamic bearing device including a sleeve ( 1 ), a shaft ( 2 ), and oil ( 100 ). With respect to the sleeve ( 1 ), a stepped portion ( 1 b ) provided at one end and an inner peripheral face...
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7625122 |
Fluid dynamic bearing
A fluid dynamic bearing includes a bearing member ( 30 ) axially defining an inner bearing hole therein, and a spindle shaft ( 20 ) rotatably received in the bearing hole with a bearing clearance...
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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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7612476 |
Motor
One preferred embodiment of the present invention provides a motor composed at least of a stator, a rotor, and a dynamic pressure bearing having a thrust dynamic pressure bearing portion and a...
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7604411 |
Fluid lubricated bearing device
An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so...
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7604410 |
Fluid lubricated bearing device
An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so...
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7604409 |
Hydrodynamic bearing member and manufacturing method thereof
The present invention aims to improve the efficiency of a clamping step for combining a flange with a shaft and to improve productivity. The shaft and the flange are tentatively combined in the...
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7602582 |
Fluid dynamic bearing system
The bearing system according to the invention comprises a sleeve-shaped first bearing disk having a bore concentric to a rotational axis, a cylindrical shaft disposed in the bore and connected to...
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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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7591591 |
Dynamic bearing device
It is an object to improve bearing rigidity in a thrust direction at high temperatures and reduce a torque at low temperatures. An axial member is arranged in such a manner that an outer...
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7586223 |
Ultra-thin spindle motor having groove formed on the outer circumferential surface of thrust bearing
An ultra-thin spindle motor having a groove formed on the outer circumferential surface of a thrust bearing is disclosed. The present invention relates to an ultra-thin spindle motor among...
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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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7578621 |
Fluid dynamic-pressure bearing device and spindle motor
A fluid dynamic-pressure bearing includes a rotatable shaft, a hub, a fixed portion, and a lubricating liquid. The hub includes a hub thrust bearing surface extending from the shaft outwardly in a...
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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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7568839 |
Fluid dynamic pressure bearing, motor, and recording medium driving device
A fluid dynamic pressure bearing has an annular dynamic pressure generating face having a dynamic pressure generating groove, which draws a working fluid toward a midway position in the radial...
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7559697 |
Dynamic bearing unit
A fluid dynamic pressure effect can be sufficient without receiving a large effect of viscous friction of lubricating oil with changes in the environmental temperature in which it is used, and...
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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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7547168 |
High speed spindle system and centrifugal chuck
An exemplary embodiment of a high speed spindle for rotating a tool at high rotational rates includes a hollow spindle body and a cylindrical spindle shaft configured for rotation within the...
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7547143 |
Fluid dynamic bearing capsule with recirculation paths
A fluid dynamic bearing capsule assembly having integral lubricating fluid recirculation paths for insertion into a disc drive hub for a data storage device that eliminates the need for machining...
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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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7527432 |
Hydrodynamic bearing type rotary device and recording and reproduction apparatus including the same
A hydrodynamic bearing type rotary device which allows bubbles in a lubricating fluid to be surely discharged from a bearing portion is provided. A hydrodynamic bearing mechanism 40 of the...
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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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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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7517153 |
Fluid dynamic bearing system
The invention relates to a fluid dynamic bearing system that has a stationary sleeve, a stationary shaft disposed in the sleeve and bearing disks disposed on the sleeve and shaft which form an...
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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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7478951 |
Hydrodynamic bearing device, spindle motor including the same, and recording and reproducing apparatus
A cylindrical sleeve is rotatably fitted over a fixed shaft erected on a base, the sleeve including an outer collar part at an outer periphery of the lower end portion thereof, a slip-out...
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7473034 |
Hydrodynamic bearing device, motor, and disk driving apparatus
A hydrodynamic bearing device with high reliability, with which reductions in size, weight, and thickness can be achieved, as well as a motor and a disk driving apparatus that make use of this...
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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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7461455 |
Method for manufacturing a fluid dynamic bearing by printing a resin sliding film
A bearing apparatus includes a rotating member, a fixed member opposing the rotating member and an ink-like resin material. Opposing surfaces of the rotating member and the fixed member form a...
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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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7448804 |
Fluid bearing device
The preset invention aims to improve the assembly accuracy and rotation accuracy of a fluid bearing device, and to further reduce the cost thereof. A bearing sleeve is fixed on the inner periphery...
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7445087 |
Seal-less head apparatus
A mill head assembly apparatus utilizing centrifugal hydrodynamic force to circulate lubrication oil while retaining the lubricant without the need for a replaceable (contact-type) seal, the...
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7438475 |
Bearing unit, and motor and electronic equipment, both equipped with the bearing unit
A bearing unit comprises a shaft, a radial bearing for supporting the shaft in a peripheral rotation direction of the shaft, a thrust bearing supporting an end of the shaft in a thrust direction of...
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7435003 |
Fluid dynamic bearing unit
A flange on a shaft of a fluid dynamic bearing unit is to be provided with a hole connecting an outer periphery of the flange and an outer periphery of the shaft. A radial groove is provided on a...
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7435002 |
Bearing unit
A bearing unit comprises a cylindrical oil-impregnated bearing, in which a bearing bore to support a turning shaft is formed so as to enable the turning shaft to turn; a bearing holder, in which...
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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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7432621 |
Fluid dynamic bearing motor
The present invention relates to the fluid dynamic bearing motor. The fluid dynamic bearing motor having a ring-shaped housing having a coil joined to an edge thereof, a sleeve including a...
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7431506 |
Motor with fluid dynamic bearing and fan employing the motor
A motor includes a support member ( 40 ) having a bearing housing ( 20 ) defining a bearing hole ( 21 ) therein, a stator assembly ( 50 ) mounted to an outer periphery of the support member, and a...
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7422371 |
Active hybrid FDB motor
An active fluid bearing system is provided. In one example, the active fluid bearing system includes an interface region formed between an outer surface of an inner member and an opposing inner...
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7422370 |
Hydraulic compensation for magnetically biased fluid dynamic bearing motor
A fluid dynamic bearing motor including a stationary sleeve, a rotating shaft axially disposed through the sleeve, a journal gap between the shaft and the sleeve, the gap defined by first and...
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7413348 |
Fluid dynamic air bearing system to rotatably support a motor
The invention relates to a fluid dynamic air bearing system to rotatably support a motor. The bearing system comprises a stationary shaft, a bearing bush partially enclosing the shaft and connected...
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7411762 |
Fluid dynamic pressure bearing including dynamic pressure generating grooves, and spindle motor and disc drive including the bearing
In a fluid dynamic pressure bearing, upper herringbone grooves and lower herringbone grooves continuous with the upper herringbone grooves are formed on the inner peripheral surface of a sleeve by...
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7407327 |
Method and system for withstanding shock in a spindle motor bearing
A system, method and means is provided for withstanding mechanical shock for use with fluid dynamic bearings. A sealing system is provided that withstands 1000 G shock events. In an aspect, a...
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7401979 |
Dynamic pressure bearing device
In a wider flow path 4 a surrounded with a shaft 3 , a thrust plate 6 and an inner circumferential corner portion 1 c of a bearing sleeve 1 in a small clearance 4 between a lower side...
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