Matches 1 - 50 out of 140 1 2 3 >
Match Document Document Title
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...
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...
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...
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...
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...
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...
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,...
7531928 Spindle motor and rotation device having dynamic pressure bearing  
A spindle motor includes a shaft including a core spindle member with a large and a small diameter portions and an encircling annulus member attached to the small diameter portion; a rotor hub...
7507039 Dynamic pressure bearing manufacturing method, dynamic pressure bearing and dynamic pressure bearing manufacturing device  
A dynamic pressure bearing manufacturing method, comprising the steps of forming a herringbone groove pattern on the outer peripheral surface of a cylindrical mask and a spiral groove pattern on...
7448805 Thrust dynamic pressure bearing, spindle motor using thereof, and information recording/reproducing device using the spindle motor  
A thrust dynamic pressure bearing with high inclination-resistant rigidity against axis runout and additionally low bearing loss torque is implemented. Herringbone grooves ( 131 ) having...
7438476 Hydraulic dynamic bearing and spindle motor  
A hydraulic dynamic bearing has a rotor comprised of a flanged shaft having a thrust ring portion and a cylinder portion, a hub attached to the flanged shaft, and a rotor magnet attached to an...
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...
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...
7401980 Axial bearing  
A thrust bearing, in particular for a turbo charger, has an essentially disc shaped bearing body ( 10 ) with a central through opening ( 12 ) for a shaft, at least one bearing surface ( 14 )...
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...
7345392 Spindle motor having a hydrodynamic bearing system  
The invention relates to a spindle motor having a hydrodynamic bearing system, particularly to drive platters in a hard disk drive, the platters being disposed on a rotor, and the bearing system...
7318674 Single thrust bearing fluid dynamic bearing motor  
A typical dynamic bearing design comprises a ring shaped or circular thrust plate mounted at or near the end of a shaft, the shaft defining together with a surrounding sleeve a journal bearing by...
7294946 Motor using dynamic gas bearings  
A dynamic pressure gas bearing motor in which a radial dynamic pressure gas bearing and a thrust dynamic pressure gas bearing are ensured to have sufficient length and diameter even though the...
7290934 Fluid dynamic-pressure bearing device and spindle motor  
Small-size, small-height fluid dynamic-pressure bearing device that causes a low shaft loss and is less prone to troubles such as shortage and leakage of lubricating liquid. A thrust...
7284909 Hybrid orbital fluid dynamic bearing motor  
Hybrid orbital fluid dynamic bearing motors are disclosed. The motors achieve improved efficiency advantages observed in fluid dynamic bearing motors containing an orbital ring. In addition, the...
7246945 Oil dynamic bearing, motor supported on oil dynamic bearing and disk drive carrying the motor  
An oil dynamic bearing, a motor and a disk drive adapted to be reduced in both size and thickness are disclosed. The oil dynamic bearing (B) includes at least two bearing portions (B 1 , B 2 ),...
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...
7220054 Dynamic pressure bearing apparatus  
A dynamic bearing apparatus which supports a shaft and a bearing so as to be capable of relative rotation by a dynamic pressure of a lubricating fluid. A bottomed screw hole ( 21 a ) is provided to...
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...
7125169 Hydrodynamic pivot bearing  
The present invention provides a bearing comprised of a hydrodynamic bearing and a pivot bearing, which can be used with a spindle motor. It also provides a spindle motor utilizing a hydrodynamic...
7101084 Dynamic pressure bearing device  
A dynamic bearing apparatus which supports a shaft and a bearing so as to be capable of relative rotation by a dynamic pressure of a lubricating fluid. A bottomed screw hole ( 21 a ) is provided to...
7052254 Oil lubricant retaining bearing structure for a fan  
An oil-retaining structure for fan comprises an oily bearing with a central axis hole for pivoting a fan shaft. An oil-collecting recess trench is formed on an inside wall of the central axis hole....
7021829 Fluid-dynamic-pressure bearing, spindle motor furnished with the fluid-dynamic-pressure bearing, method of manufacturing rotor assembly applied in the spindle motor, and recording-disk drive furnished with the spindle motor  
Fluid-dynamic-pressure bearing furnished with a shaft, a top plate fixed to an upper portion of the shaft, a thrust plate fixed to a lower portion of the shaft, a sleeve, and a cuplike bearing...
7011450 Fluid dynamic bearing device and motor including the device  
A fluid dynamic bearing device including a shaft having an interior pressure regulating hole by which a center portion of a thrust surface confronting a thrust plate and a lubricant pool portion of...
7008110 Hydrodynamic pivot bearing  
The present invention provides a bearing comprised of a hydrodynamic bearing and a pivot bearing, which can be used with a spindle motor. It also provides a spindle motor utilizing a hydrodynamic...
7004634 Fluid dynamic bearing asymmetry pressure feedback  
The present invention relates to the field of fluid dynamic bearings. Specifically, the present invention provides an apparatus and method useful for maintaining axial movement of a rotor in a high...
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...
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...
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...
6971798 Gas dynamic pressure bearing unit, spindle motor, hard disk drive and polygon scanner utilizing gas dynamic pressure bearing system  
It is the object of this invention to provide a gas dynamic pressure bearing system with high rigidity and reliability. The unit is configured such that a thrust bearing sends lubricating gas under...
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...
6876112 Low power spindle motor with a fixed shaft  
A spindle motor for use in a disk drive having a base frame, a housing cover, a fixed shaft and a rotatable bearing sleeve. The fixed shaft has a larger diameter section and a smaller diameter...
6838795 Low velocity, high pressure thrust pump  
A fluid dynamic bearing motor is provided comprising a base, a counter plate fixed to the base, a stationary sleeve fixed to the base and supported on the counter plate, a rotating shaft axially...
6834996 Motor with dynamic pressure bearing  
A dynamic pressure bearing motor includes a rotary shaft, a rotary hub coupled to the rotary shaft, a dynamic pressure bearing sleeve that supports the rotary shaft by dynamic pressure and has a...
6782338 Apparatus and method for characterizing grooved journals  
Embodiments of the invention generally provide a method for characterizing the surface topology of a hydrodynamic bearing used with a disc drive. In one embodiment, the invention provides a method...
6771460 Spindle motor and magnetic disc device using thereof having radial and thrust bearings  
A spindle motor for magnetic disc device includes a hub having an inside and an outer peripheral side on which a magnetic disc is mounted, a rotary shaft having an axial direction and coupled with...
6765326 Cooling device motor having a hydrodynamic bearing with a unitary shaft thrust supporter  
A motor and a cooling device include (a) a frame with an opening, (b) a frame-housing provided on the frame and having one open side, (c) a stator mounted on an outer wall of the frame-housing, (d)...
6722785 Fluid dynamic bearing  
A fluid dynamic bearing has a shaft ( 11 ) fitted in a sleeve ( 12 ) for rotation, with a fluid filled therebetween. The shaft ( 11 ) and/or sleeve ( 12 ) is formed with a pattern consisting of...
6702466 Ceramic dynamic-pressure bearing, motor having bearing, hard disk drive, polygon scanner, and method for manufacturing ceramic dynamic-pressure bearing  
A ceramic dynamic-pressure bearing having dynamic-pressure grooves. At least a portion including a surface (dynamic-pressure gap definition surface) facing a dynamic-pressure gap is formed of...
6702408 Single plate hydrodynamic bearing cartridge  
Hydrodynamic bearing having a shaft relatively rotatable with respect to a surrounding sleeve and having a thrust plate on one end thereof rotating in a recess of the sleeve. The shaft is...
6695480 Opposed flow seal/bearing assembly  
A seal and bearing apparatus for a rotating shaft including a pair of sleeves with two spiral grooves ( 14 ) on an inclined surface ( 16 ).
6672767 Dynamic bearing device and motor having the same  
In the dynamic bearing device, a chamfer having a larger percentage of surface openings is continuous to the outer diameter side of a lower end surface of a bearing member, which constitutes a...
6592262 Bearing performance enhancement utilizing sleeve/hub radial surfaces  
A motor is disclosed comprising a rotating shaft where the shaft comprises both an axial shaft and at least one thrust plate, both the shaft and thrust plate being supported for rotation by fluid...
6592490 Well pump gear box hydrodynamic washer  
A hydraulic washer or spacer is used to reduce friction between a planet gear and the planet carrier. The washer has a top side and a bottom side, an inner diameter and an outer diameter. A mating...
6575633 Hydraulic bearing motor  
In a hydraulic bearing motor, by means of dynamic pressure generating grooves provided on a thrust shaft with a larger diameter not only on the end face thereof but also on the shaft surface...
Matches 1 - 50 out of 140 1 2 3 >