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8181348 |
Shielding fluid reservoirs of fluid dynamic bearing motors
In one example, a fluid dynamic bearing motor having a shield member is provided. In one example, the method includes disposing a first member and a second member for relative rotation about an...
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8120220 |
Fluid dynamic bearing device and manufacturing method therefor
To provide a fluid dynamic pressure bearing device that achieves high rigidity against moment without degradation in assembly precision and bearing performance, bearing sleeves are arranged in an...
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8107190 |
Fluid bearing device, method of manufacturing the same, and disk drive device
Provided is a fluid bearing device with a hub part having high molding precision and dimensional stability and capable of being produced at low cost. An annular gate (14) is formed at a portion of...
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8087156 |
Methods of manufacturing fluid-dynamic-pressure bearing and spindle motor incorporating the bearing, and spindle motor and recording-disk drive incorporating the bearing
In spindle motors journaled on fluid-dynamic-pressure bearings, especially in such spindle motors employed in recording-disk drives in implementations that subject the drives to vibration and...
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8046905 |
Motor manufacturing method
A method of manufacturing a motor includes coupling a base cover to a sleeve having a penetration hole formed therein, such that one side of the penetration hole is closed; inserting a shaft in the...
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8028409 |
Method of fabricating planar spring clearance seal compressors
In accordance with the method, a gas bearing is energized to center the piston in the cylinder prior to rigidly attaching the planar spring or springs between the piston and the compressor frame....
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8020301 |
Method for manufacturing hydro dynamic bearing device
A method for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device, specifically for properly...
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8001691 |
Method for manufacturing hydrodynamic bearing and shaft
A method for manufacturing a hydrodynamic bearing (30) comprises steps of: step (201): providing a substrate (10) with a plurality of protrusions (14) formed on a periphery thereof; step (202):...
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7987598 |
Dynamic bearing manufacturing method
A dynamic bearing manufacturing includes steps of: providing a bearing and a processing tool, the bearing having an axial hole, and the processing tool having at least one protruding pattern formed...
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7941926 |
Apparatus for manufacturing hydro dynamic bearing device method
An apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device. The hydro dynamic...
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7926182 |
Method for manufacturing hydrodynamic bearings
A method for manufacturing a hydrodynamic bearing with hydrodynamic pressure generating grooves comprises steps of: step 201: providing a substrate with a first annular protrusion and a plurality...
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7921565 |
Working fluid injection apparatus, method of injecting working fluid, and method of manufacturing fluid dynamic pressure bearing
A working fluid injection apparatus has an upper chamber that stores a working fluid and a lower chamber that removably receives a bearing unit having a housing and a shaft that is inserted in the...
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7908737 |
Production method of fluid dynamic-pressure bearing in spindle motor
A gas is fed, so as to cause a gas flow to occur from a lower opening of a bearing hole of a sleeve 6 in an outward direction of an annular portion 12a of a rotor hub 12 via a radial gap 50 and an...
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7905019 |
Working fluid injection apparatus for a fluid dynamic pressure bearing
A working fluid injection apparatus for injecting a working fluid into a gap between a housing and a shaft of a bearing unit of a fluid dynamic pressure bearing. The apparatus has an adapter...
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7887678 |
Electrode tool for electrochemical machining and method for manufacturing same
An electrode tool for electrochemical machining includes a machining electrode surface (1a). The machining electrode surface (1a) includes a conductive pattern defined by lands (3) and grooves (3a)...
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7866046 |
Method for manufacturing hydrodynamic bearing and shaft
A method for manufacturing a hydrodynamic bearing (30) includes the following steps. First, a substrate having a surface with multiple protrusions thereon is formed. The protrusions are adapted for...
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7856719 |
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...
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7836601 |
Methods of controlling the instability in fluid film bearings
A method of controlling the instability in fluid film bearings by using a magnetic bearing in combination with a fluid film bearing (whether it is a cylindrical journal bearing, an elliptic...
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7823290 |
Method of forming a hub for use in a disk drive motor
Methods of machining a single piece hub with integral upper and lower female cones includes providing a single piece hub with upper and lower conical voids having respective narrow ends proximal...
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7814659 |
Method of manufacturing fluid dynamic bearing assembly
In a method of manufacturing a dynamic bearing assembly having a shaft and a sleeve whose inner circumferential surface faces an outer circumferential surface of the shaft, the shaft is inserted...
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7764463 |
Fluid dynamic pressure bearing for spindle motors and storage disk drive devices and having ridge portions between grooves in the fluid dynamic pressure bearing
A fluid dynamic bearing having a shaft (12) and a bearing sleeve (11) rotatably supported relative to each other. At least one of the shaft and the bearing sleeve is made of steel or stainless...
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7676928 |
Method for use in the manufacturing of a fluid dynamic pressure bearing
Oil which will serve as a lubricating fluid of a fluid dynamic pressure bearing is degassed in a first environment under a first pressure which is lower than atmospheric pressure. First and second...
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7650697 |
Methods of manufacturing fluid-dynamic-pressure bearing and spindle motor incorporating the bearing, and spindle motor and recording-disk drive incorporating the bearing
In spindle motors journaled on fluid-dynamic-pressure bearings, especially in such spindle motors employed in recording-disk drives in implementations that subject the drives to vibration and...
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7640665 |
Method of manufacturing shaft unit
In a rotor hub manufacturing method, a workpiece is chucked and a hole centering on the workpiece center axis is formed in the workpiece. A sealing member is press-fit into the hole, forming an...
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7600320 |
Method for manufacturing hydro dynamic bearing device
A method for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device. The hydro dynamic bearing is...
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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 (10a, 10b) are firstly provided. Each of the bearing parts has its shape corresponding to a...
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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...
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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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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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7343682 |
Technique for filling bearing clearance of fluid-dynamic-pressure bearing unit with oil
Fluid-dynamic-pressure bearing manufacturing method for more efficient and fail-safe degassing of bearing oil. Method makes it possible to prevent the generation of air bubbles in the course of an...
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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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7275319 |
Rolling element bearing having starved lubrication conditions
A rolling element bearing comprises an inner ring and an outer ring which are each provided with a raceway, and a series of rolling elements which are in contact with the raceways of each ring. A...
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7251891 |
Production method for sintered bearing member, fluid dynamic pressure bearing device, and spindle motor
A production method for sintered bearing member comprises: compacting a metal powder into a green compact, sintering the green compact into a sintered compact; impregnating a resin solvent into the...
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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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7146733 |
Dynamic bearing device and method for making same
The thrust member is inserted into the inner circumferential surface of the housing, to make the end face of the thrust member contact with the lower side end face of the flange portion, and at the...
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7140109 |
Bearing assembly and method
A bearing assembly and method in which a bearing cage is disposed around a rotating member and a housing is disposed around the cage. A first portion of the radial outer surface of the cage extends...
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7115894 |
Method to determine the lubricant filling degree of a fluid dynamic bearing
In order to improve a method to determine the lubricant filling degree of a fluid bearing in which the bearing gap of the fluid bearing is illuminated and the luminous reflectance is analyzed so...
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7065876 |
Extra-roll slide bearing system for a paper/board machine or a finishing machine
The invention relates to an extra-roll slide bearing system (20) for a paper/board machine or a finishing machine, surrounding a shaft (2) in a roll (1). The bearing system comprises a body section...
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7063463 |
Conical hydrodynamic bearing device and a recording disk drive equipped with it, and a method of manufacturing a conical hydrodynamic bearing device
A conical hydrodynamic bearing device comprises a shaft bush having a conical inclined dynamic pressure surface around an outer circumference thereof being relatively-rotatably inserted in a...
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7059052 |
Hydrodynamic type porous oil-impregnated bearing
The porous oil-impregnated bearing 1 comprises a bearing body 1a made of a porous material, and oil retained in the pores of the bearing body 1a by impregnation with lubricating oil or lubricating...
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7043839 |
Method and apparatus for charging oil into fluid-dynamic-pressure bearings, spindle motor utilizing fluid-dynamic-pressure bearings, and signal record-and-playback device utilizing fluid-dynamic-pressure bearings
Manufacturing method enabling optimal volume oil-fill even where differing from bearing to bearing due to machining fluctuations in volume-production dynamic pressure bearings. In a first charging...
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7040019 |
Method and apparatus for manufacturing hydro dynamic bearing device
A method and an apparatus for manufacturing a hydro dynamic bearing device is provided for the finishing treatment of lubricating oil after lubricating the hydro dynamic bearing device,...
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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...
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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)...
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6990737 |
Fluid bearings and vacuum chucks and methods for producing same
Fluid bearings, vacuum chucks and methods for producing these devices. One example of a method for forming a fluid bearing includes forming a plate having a face surface and a bonding surface,...
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6939048 |
Hydrodynamic thrust bearing
A hydrodynamic thrust bearing, forming a part of a bearing system for a rotary bearing of spindle motors utilized to power hard disk drives, which includes at least one annular thrust plate and a...
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6904682 |
Dynamic pressure bearing and method of manufacturing the same
In a dynamic pressure bearing, when a step portion (1a) is formed on the inner peripheral surface (1b) of a sleeve (1) and radial dynamic pressure grooves (3) are formed on the inner peripheral...
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6905617 |
Etching method for making fluid bearings
This specification discloses an etching method for making fluid bearings. The invention uses an ejection axis as the mask of the bearing cast. A protection material is inserted into the inner...
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6857189 |
Method and apparatus for assembling a hydrodynamic bearing
A method and apparatus for assembling a hydrodynamic bearing in a motor is provided. The method comprises affixing a first bearing upon a shaft, applying an axial tension force to the shaft, and...
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6851859 |
Bearing unit, production method therefor and spindle motor
A bearing unit comprises a bearing 60 formed of a sintered metal in which a magnetized magnetic powder is dispersed in its matrix and at least pores exposed on a bearing surface thereof are sealed...
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