Matches 1 - 50 out of 226 1 2 3 4 5 >
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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...
7525226 Dynamic pressure bearing and motor using the same  
One preferred embodiment of the present invention provides a dynamic pressure bearing formed of a porous material into a shape of a cylindrical sleeve, for rotatably supporting a shaft inserted...
7491043 Variable displacement pump having a rotating cam ring  
Vane pump ( 10 ) mechanical losses are reduced by removing vane friction losses and replacing them with lower magnitude journal bearing fluid film viscous drag losses. A freely rotating cam ring (...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
7090401 Grooving pattern for grooved fluid bearing  
A fluid dynamic bearing is provided having two surfaces rotatable with respect to each other, a lubricating medium located in a gap between the two surfaces during rotation of the bearing, and an...
7088019 Air bearing for MEMS based motor  
A MEMS (micro-electromechanical system) device having a rotor 44 , a stator 43 and a shaft 27 connected to the stator 43 and around which the rotor 44 rotates. Grooves 47 are formed in a...
7077572 Lubricating oil guiding system for motor bearings  
A lubricating oil guiding system for a motor includes an axial tube, a first bearing mounted in the axial tube, a second bearing mounted in the axial tube, at least one separating plate securely...
7059773 Hydrodynamic bearing, spindle motor and hard disk drive  
The invention relates to a hydrodynamic bearing having a shaft, a bearing sleeve that encloses the shaft with a short radial spacing forming a concentric bearing gap, and an equalizing volume that...
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....
7033078 Hydrodynamic bearing assembly and spindle motor having the same  
This invention is to provide a hydrodynamic bearing assembly, which realizes the high rotation rate in a stable manner and the robust rigidity. The hydrodynamic bearing assembly has a total radial...
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...
7014366 Fluid dynamic bearing and magnetic disk apparatus  
In the present invention, in order to provide a fluid dynamic bearing, having heat resistance, wherein the electrical charging on a rotation portion is prevented and the torque loss caused by a...
7008108 Gas bearing for a rapidly rotating shaft, comprising an adjusting device for eccentrically adjusting a gas bearing and a method for operating a gas bearing of this type  
The invention relates to a gas bearing of a rapidly rotating shaft, whose end supports a tool, in particular to a gas bearing of a rapidly rotating shaft, whose end supports a polygon mirror ( 27 )...
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...
6974257 Dynamic pressure bearing  
A dynamic pressure bearing is provided in which required performances such as corrosion resistance and wear resistance in the use of a hard disk drive or the like are realized without application...
6948854 Fluid dynamic bearing motor optimized for radial stiffness and power consumption  
A variable-gap fluid dynamic bearing motor assembly is described. In one embodiment, the assembly includes a hub configured to rotate about a rotational axis and to support at least one disc. The...
6948852 Hydrodynamic bearing, spindle motor and hard disk drive  
A hydrodynamic bearing having a shaft ( 10 ) and a bearing sleeve ( 12 ), which encloses the shaft with a slight radial clearance forming a concentric bearing gap. An equalizing volume cavity ( 20...
6948669 Apparatus for mixing and aerating material  
This invention generally relates to reduction drive assemblies and, more particularly, to belt and pulley reduction drive assemblies and related support structure for portable equipment to mix and...
RE38791 Sliding bearing  
A helically continuous projection 1 a is formed around a sliding surface 1 A of a sliding bearing 1 at a given pitch p . The surface roughness h of the sliding surface 1 A, including the...
6905247 Fluid bearing and brushless motor having the same  
A fluid bearing with an oil circulating hole therein has a bearing housing fixedly assembled to a stator base having a closed bottom surface; and upper and lower bearing portions; and a thrust...
6896143 Electrolytic machining method, method for manufacturing dynamic pressure bearing devices, and dynamic pressure bearing devices manufactured according to the manufacturing method  
An electrolytic machining method for electrolytically machining a workpiece is provided. The method uses a masking member having through-hole patterns that correspond to the shapes of concave parts...
6880976 Hydrodynamic and hydrostatic hybrid bearing and its manufacturing method  
A hybrid type hydrodynamic and hydrostatic bearing and its manufacturing method are disclosed by the invention. By making use of a penetrated dynamic pressure generating groove carved on the...
6877902 Hydrodynamic bearing device  
A hydrodynamic bearing device in which an incline between the center line of a shaft and the center line of a sleeve can be eliminated, rotational precision improved, and NRRO reduced,...
6872002 Bearing material for porous hydrostatic gas bearing and porous hydrostatic gas bearing using the same  
A bearing material includes: a backing metal made of stainless steel; and a porous sintered metal layer integrated with at least one surface of the backing metal by means of a bonding layer,...
6857781 Rotor bearing with propeller for increased lubricant flow  
A pumping system is provided that includes a pump assembly and a motor assembly. The motor assembly has a bearing collar and a bearing sleeve concentric to the bearing collar. Preferably, the...
6848829 Hydrodynamic bearing arrangement for a spindle motor  
A hydrodynamic bearing system for use in a spindle motor, especially for the actuation of hard disk drives, wherein the bearing arrangement features a shaft and a sleeve which, supported by a...
6836041 Bearing device for a motor having a bearing set including multiple bearings of different materials  
A bearing device ( 10 ) for a motor ( 12 ) includes a bearing set ( 20 ) and a shaft ( 14 ). The bearing set includes first and second bearings ( 21, 26 ), which are made of sintered metallic...
6805489 Dynamic pressure bearing device  
A dynamic pressure bearing device, comprising: a shaft member; a bearing member relatively rotatably supporting the shaft member; a plurality of dynamic pressure generation parts provided on a...
6769808 Composite fluid dynamic bearing and its manufacturing method  
A composite fluid dynamic bearing and its manufacturing method is disclosed. By machining a plurality of bearings independently, the grooves of each bearing have uniform slopes. Then the method of...
6736609 Support apparatus for movable member and pump apparatus  
A pump apparatus of simple construction has a bearing structure for which a lubricant is unnecessary. A flow passage for a refrigerant (liquid ammonia) is formed in a housing to provide...
6733180 Method of manufacturing dynamic pressure bearing device, and dynamic pressure bearing device  
To provide a manufacturing method of a dynamic pressure bearing device and a dynamic pressure bearing device to inject a proper amount of lubricating oil to a bearing unit by using a simple process...
6679501 Motor with stationary shaft and high speed capillary seal  
A motor or bearing which incorporates the use of a capillary seal adjacent a bearing race between the shaft and surrounding hub or housing. The seal may take a plurality of forms, including a...
Matches 1 - 50 out of 226 1 2 3 4 5 >