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| Number | Title | Issue Date |
| 8070362 | Sliding radial bearing A sliding radial bearing assembly for use on a rotating shaft in machinery where a fluid lubricant passes through the assembly to provide a lubricant film between stationary and rotating parts of the assembly. Any gaseous phase is allowed readily to escape from the ... | 12/06/2011 |
| 8052327 | Hydrostatic gas bearing, rotator and CT scanner A hydrostatic gas bearing capable of easily adjusting a clearance between a rotor and a radial bearing pad is provided. This hydrostatic gas bearing comprises a radial bearing pad radially supporting a rotor, a linear motion guide moving the radial bearing pad and a... | 11/08/2011 |
| 8007177 | Fluid dynamic bearing system A fluid dynamic bearing system that has a first bearing part and a second bearing part that is rotatable with respect to the first bearing part, both of which form a bearing gap filled with a bearing fluid between opposing bearing surfaces. ... | 08/30/2011 |
| 7988361 | Hydrodynamic type oil-impregnated sintered bearing A hydrodynamic type oil-impregnated sintered bearing includes a porous bearing body of sintered metal having a bearing surface opposed to a sliding surface of a rotating shaft, hydrodynamic pressure generating grooves slanting against an axial direction provided in ... | 08/02/2011 |
| 7976222 | Drivetrain connection having film bearings A drivetrain for use with a power unit. The drivetrain may have a driving member, a driven member, and a sleeve disposed between the driving member and the driven member. The drivetrain may further have a first oil film bearing disposed between the sleeve and one of... | 07/12/2011 |
| 7959357 | Fluid dynamic bearing spindle motor A fluid dynamic bearing motor is described. In one embodiment, the fluid dynamic bearing motor includes a base that has a bore hole and a liner secured within the bore hole. The fluid dynamic bearing motor also includes a rotor assembly that has a shaft, which is pa... | 06/14/2011 |
| 7708465 | Hydrodynamic bearing device, spindle motor, and method for manufacturing hydrodynamic bearing device Highly reliable hydrodynamic bearing device and spindle motor are provided as a result of improving cleanliness by using an iron metal having austenite structure, which is a non-magnetic body, and solving the problem of lowering of abrasion resistance due to low har... | 05/04/2010 |
| 7566174 | 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 that the oil surface of the lubricating oil is within a seal space. Un... | 07/28/2009 |
| 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 and a shaft accommodated in a bore in the bearing sleeve and rotatably ... | 12/16/2008 |
| 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 system also includes a shaft centrally located in the housing. The bear... | 12/16/2008 |
| 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 rotor assembly (60) having a rotary shaft ... | 10/07/2008 |
| 7429132 | Hydrostatic air bearing with a porous metal ring A hydrostatic air bearing in which a journal rotates within a cavity formed within a bearing race, and a sleeve that rotates with the journal within the cavity of the bearing race, where the sleeve is formed of a porous metallic material that allows for a bearing fl... | 09/30/2008 |
| 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 second interfacial surfaces of the shaft and sleeve, at least one set of f... | 09/09/2008 |
| 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 capillary reservoir may comprise a tapering gap that is vented to a ga... | 08/26/2008 |
| 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 grooved pumping seal employed between a thrust plate and a shield, a thrus... | 08/05/2008 |
| 7391139 | Spindle motor and rotation apparatus A spindle motor which allows appropriate formation of communicating hole for compensating a pressure difference due to an error in working of dynamic pressure generating grooves and other components, easy formation of dynamic pressure generating grooves and readily ... | 06/24/2008 |
| 7380989 | Fluid dynamic pressure bearing and recording disk drive device comprising the same In a radial minute gap between a substantially columnar shaft and an inner peripheral face of a substantially cylindrical sleeve, oil is retained and a radial dynamic pressure bearing is formed. A plurality of recessed portions are arranged in a circumferential dire... | 06/03/2008 |
| 7365939 | Dynamic-pressure bearing device and disk drive An ionic liquid is utilized as the dynamic-pressure fluid charged inside a bearing space formed in the gap where an axial bushing (axial component) [21] and a bearing sleeve (bearing component) [13] oppose. Designing a dynamic-pressure bearing device i... | 04/29/2008 |
| 7364403 | Lubricating system for a fan A lubricating system for a fan (10) includes a lubricant storage space (17) formed at an end portion of the fan for receiving lubricant therein. A lubricant temporary retaining space (145) is defined at the other end portion of the fan for tempo... | 04/29/2008 |
| 7360950 | Hydrodynamic bearing assembly This invention provides a hydrodynamic bearing assembly which realizes a high rotation rate in a stable manner with robust rigidity. The hydrodynamic bearing assembly has a total radial gap of 3 microns or less for preventing contact with the thrust bearing. The thr... | 04/22/2008 |
| 7354212 | Image forming apparatus An image forming apparatus includes a chassis, a motor, a drive transmission gear that receives rotational force from the motor, a feed roller rotatably supported by the chassis, an intermediate gear that has a circular bearing, receives rotational force from the dr... | 04/08/2008 |
| 7320716 | Method for toughening surface of sintered material cutting tool and sintered material cutting tool having long life A ceramics sintered material cutting tool, characterizing in that it has a dislocation structure which formed on the surface thereof in a straight line from and distributed uniformity in a dislocation density of 1×104 to 9×1013 cm−2 | 01/22/2008 |
| 7314314 | Oil retaining structure of a spindle This invention relates to an oil retaining structure of a spindle, wherein the outer peripheral surface of the spindle is provided with a first oil groove extending spirally along a clockwise direction and a second oil groove extending spirally along a counterclockw... | 01/01/2008 |
| 7267484 | 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 of a housing. An axial member is supported in a non-contact manner in... | 09/11/2007 |
| 7262935 | Top cover attached single plate fluid dynamic bearing motor In one aspect of the invention, a motor having improved stiffness is provided. In one embodiment, the motor includes a stationary shaft, a hub, a thrust plate and a counter plate. The thrust plate is coupled to the shaft. The hub is rotatable about a central axis of... | 08/28/2007 |
| 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 a thrust direction of the shaft; a housing having a closed structure... | 08/21/2007 |
| 7234868 | Radial pumping oil seal for fluid dynamic bearing motor An improved rotational motor, such as a spindle motor for a disc drive, is provided. The motor first comprises a hub having a shaft portion and a horizontal body portion. The motor also comprises a sleeve surrounding the shaft portion of the hub. A fine first vertic... | 06/26/2007 |
| 7229214 | Fluid dynamic bearing unit A fluid dynamic bearing unit includes a bearing housing (20) axially defining therein a bearing hole (21), a rotary shaft rotatably received in the bearing hole with a radial space formed between the rotary shaft and the bearing housing, and lubricant ... | 06/12/2007 |
| 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 grooves and external circumference with uniform roughness, and machined m... | 06/05/2007 |
| 7220055 | Air bearing having unitary housing An air bearing including a unitary, i.e., single piece, housing, which removes the need for an insert, is disclosed. The air bearing may include a shaft opening longitudinally extending through the housing for receiving the shaft; a plurality of passages that longit... | 05/22/2007 |
| 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 ceramics containing crystal grains of Al2O3, crystal... | 03/27/2007 |
| 7186027 | Fan motor with fluid dynamic bearing A fan motor includes an integral bearing member (40′) defining therein an axial inner bearing hole (21′) and forming a ventilating path (25′) in a wall portion thereof to communicate a bottom of the bearing hole with an exterior of the bea... | 03/06/2007 |
| 7186028 | Hydrodynamic bearing device A hydrodynamic bearing device capable of inhibiting leakage of a working fluid to an outside of a bearing and preventing reduction in radial bearing rigidity, and capable of keeping a gap between a thrust bearing and a radial bearing favorable and rotating stably. T... | 03/06/2007 |
| 7163368 | Hydrodynamic bearing runner for use in tilting pad thrust bearing assemblies for electric submersible pumps An electrical submersible pump runner having a core layer and a wear layer affixed to the core layer. One embodiment of the invention provides an electrical submersible pump that includes a motor section and a centrifugal pump section. A seal section and rotary gas ... | 01/16/2007 |
| 7160622 | Oil repelling agent An oil repelling agent to coat a dynamic pressure device, such as a fluid dynamic pressure bearing device, includes a UV coloring agent, a fluorine-based polymer and a solvent. In an exemplary embodiment of the invention, the concentration of the UV coloring agent c... | 01/09/2007 |
| 7158330 | Method and apparatus for servo track writing by track following on a dedicated servo disk on a fluid spindle bearing What is disclosed is a method and apparatus for writing servo information on disks to be used in a hard disk drive assembly. In one embodiment, servo information is pre-written onto a disk using an offline servo track writer which employs a fluid dynamic bearing spi... | 01/02/2007 |
| 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 part and at least one outer bearing part, the bearing parts being rotata... | 12/26/2006 |
| 7134792 | Single thrust-journal bearing cup fluid dynamic bearing motor A fluid dynamic bearing motor is described. In one embodiment, the fluid dynamic bearing motor includes a stationary member and a rotating member. The motor further includes a fluid dynamic thrust bearing disposed along an axial surface of a sleeve. The thrust beari... | 11/14/2006 |
| 7125170 | Fluid dynamic bearing motor Provided is a fluid dynamic bearing motor in which a rotor is rotatably supported by forming an oil gap between the rotor and a stator to form a fluid dynamic pressure bearing and a plurality of oil grooves are formed in a surface of the rotor or stator forming the ... | 10/24/2006 |
| 7126969 | Scalable system and method for reliably sequencing changes in signaling bits in multichannel telecommunication lines transmitted over a network Provided is a system and method for reliably processing changes in signaling bits for telecommunication transmitted over a network. The system includes a plurality of framer farms adapted to generate a corresponding plurality of event signals responsive to a corresp... | 10/24/2006 |
