Matches 51 - 100 out of 228 < 1 2 3 4 5 >
Match Document Document Title
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...
6659647 Ceramic dynamic pressure bearing, motor with bearing, hard disk device, and polygon scanner  
A ceramic dynamic pressure bearing, includes: a first member having an outer periphery formed with a gap forming surface causing a radial dynamic pressure, and a second member having an inner...
6626577 Radially inner surface structure of a bearing  
The radially inner surface structure of the bearing in accordance with the present invention mainly comprises a pair of guiding groove sets and a plurality of convergent points thereof. The guiding...
6508590 Externally pressurized gas bearing spindle  
An air spindle is provided which allows high-speed operation without reducing the bearing stiffness in the air spindle by reducing the heat generation at bearing portions. By increasing the number...
6505968 System for active stiffness, power, and vibration control in bearings  
A bearing assembly having a shaft member having a bearing race and a piezoelectric member opposing the bearing race is situated so that when a voltage is applied to it, it expands against the...
6457867 Method and apparatus for replenishing oil in a fluid dynamic bearing using a sleeve groove  
A method and apparatus for replenishing oil in a fluid dynamic bearing using a sleeve groove. The replenishing groove is formed in the sleeve surrounding the shaft so that centrifugal force drives...
6450688 Fluid bearing having a foil assembly  
A fluid bearing includes a foil assembly that supports a journal inside a stationary retaining member includes a cylindrical top foil that is positioned radially inward, a cylindrical mid-foil that...
6428211 Hydrodynamic gas bearing structure  
A hydrodynamic gas bearing structure includes a columnar shaft body ( 1 ) and a hollow cylindrical bearing body ( 2 ) arranged opposing the shaft body ( 1 ) with a space ( 3 ) maintained in the...
6402385 Dynamic pressure bearing apparatus  
A dynamic pressure bearing apparatus comprises a rotary shaft, a sintered oil retaining bearing rotatably supporting the rotary shaft, the sintered oil retaining bearing having an interior surface...
6378209 Method of producing fluid bearing device  
In a dynamic pressure bearing device which has a shaft ( 3 ), a bearing ( 10 ) rotatable relative to the shaft ( 3 ), and capillary seal portions ( 13, 14 ) for holding a lubricating fluid ( 15 )...
6364532 Hydrodynamic bearing and motor having the same  
A bearing comprises a rotating shaft, a sleeve which surrounds the outer wall of the rotating shaft and supports the rotating shaft in such a manner that the rotating shaft is rotatable, and a...
6361214 Hydrodynamic-pressure bearing device and motor provided with the hydrodynamic-pressure bearing device  
Spindle motor hydrodynamic pressure bearing device having upper and lower radial bearing portions axially separated by an air space, established in the micro-gap between the outer circumferential...
6357920 Sintered oil retaining bearing and spindle motor for information equipment  
There is provided a sintered oil retaining bearing that secures the stability of an oil film and achieves high running accuracy through management to exclude a variation in the size of surface...
6341896 Hydrodynamic bearing and method of manufacturing the same  
A shaft member 21 the flexible, austenitic stainless steel is cold worked, and in the cold working process, a cold working ratio is increased, whereby a surface of the shaft member 21 is...
6338574 Bearing mechanism, hard disk drive mechanism and polygon mirror drive mechanism using the bearing mechanism, and method for manufacturing herringbone groove portions of dynamic-pressure bearing  
A bearing mechanism eliminates the need for lubricating oil, is capable of generating enough radial dynamic pressure even in lower-speed regions, and yet can be easily surface-machined for the...
6318896 Annular bearing with diffuser and inlet flow guide  
An annular fluid film bearing is formed of a stator ring and a rotatable element concentrically mounted within the stator ring such that an annular clearance is defined between the inner surface of...
6315452 Zero static-friction actuator pivot bearing for production disk drives  
A hydrostatic bearing assembly, with an integral rotating-shaft hydrodynamic pump, adapted for use as a stiff zero static-friction actuator pivot bearing for the head-stack assembly of a disk drive...
6302667 Oil-free screw rotor apparatus  
The invention relates to a rotary screw machine that is completely oil-free. Known rotary screw machines with cooling, sealing, lubrication of the screw rotors and oil-lubrication and oil-cooling...
6244749 Dynamic pressure bearing device and method for manufacturing same  
The dynamic pressure bearing device is structured such that the pores of porous material as they are are disposed in the surfaces thereof forming the negative pressure cancel portions 15b and a...
6242830 Motor  
In a motor having a bearing housing 7 with a hollow portion 23, a radial bearing 9 held in the hollow portion 23, a thrust receiving plate 8 provided at one end of the hollow portion 23, and a...
6241392 Hybrid bearing  
A bearing for supporting a rotating shaft receiving a transverse load, wherein the bearing supports the shaft along a load line and wherein the bearing is closest to the rotating shaft at a running...
6206572 Bearing device  
It is an object of the invention to provide a bearing device in which the bearing performance is not lowered even when the temperature is changed. In order to attain the object, the bearing device...
6196723 Dynamic groove bearing comprising a porous lubricant reservoir  
The invention relates to a dynamic groove bearing (9) comprising an internal bearing part (23) and an external bearing part (17) which are rotatable relatively to each other about an axis of...
6186061 Press bearing lubrication system  
A plurality of hydrostatic bearing pads are each integrally formed in a respective pin or journal member being used within a mechanical press machine. The hydrostatic bearing pads are supplied with...
6170988 Self-acting air bearing apparatus  
A self-acting air bearing wherein an abrasion-generated substance is generated by rotation of a shaft and a bearing and is used as a lubricant. As a result, a motor of low cost and stable rotation...
6082900 Dynamic pressure pneumatic bearing structure and method of manufacturing the same  
Provided is a hydrodynamic gas bearing structure which can prevent occurrence of whirl not only in high-speed rotation but also in low-speed rotation, reduces such frequency that a floating...
6056441 Tire track roughened orifice compensated hydrostatic bearing  
An orifice compensated hydrostatic bearings wherein a roughened surface area retards the hydrostatic fluid flow exiting the hydrostatic bearing reducing the whirl frequency ratio while increasing...
6053636 Hydrostatic bearing with compensatory fluid injection  
A hydrostatic bearing is uniquely configured for improved operability. A hydrostatic bearing (32) has a collar (42) that circumscribes a shaft (18) to define a fluid film annulus (50) for radially...
6000851 Adjustable electric motor bearing system  
The parameters of a rotor bearing assembly are readily changed to facilit evaluation, determination and establishment of optimum bearing clearance and rotor bearing adjustment to minimize noise and...
6000850 Dynamic pressure bearing made of porous material  
The invention provides a dynamic pressure bearing capable of generating enough dynamic pressure even with the use of a porous material. Dynamic pressure grooves at an inner circumferential surface...
5998898 Motor having hydrodynamic bearing  
Herringbone grooves are formed on an inner wall of a sleeve through which a motor shaft is inserted. Lubricating fluid is provided between a space between the shaft and the sleeve so as to form a...
5994803 Brushless DC motor  
A brushless DC motor is disclosed. In the motor, an axial vibration limit unit is provided on a bearing and electromagnetically attracts a rotor, thus preventing the rotor from being centrifugally...
5988887 Journal bearing apparatus  
A journal bearing apparatus capable of varying the clearance between a bush which protrudes from the inner surface of a sleeve in which a rotation shaft is inserted and the outer surface of the...
5941645 Bearing assembly  
A bearing assembly comprises a piston mounted within and capable of reciprocating with respect to a fixed bearing shell. The bearing shell is provided with openings for the supply of a bearing...
5938343 Oil filling seal for hydrodynamic motor utilizing a movable sealing element  
A rotating shaft motor or cartridge incorporates an o-ring which surrounds the rotating shaft and is borne on a carrier. As supported on the carrier, the o-ring does not normally block the bearing...
5927859 Sleeve bearing structure  
A sleeve bearing structure for holding a shaft rotating in a first direction includes a bearing having an inward wall defining therein a through hole, a bearing stand engaged with the bearing for...
5924798 Hydrodynamic bearing apparatus and method for manufacturing thereof  
A hydrodynamic bearing apparatus and a method for manufacturing a hydrodynamic bearing apparatus consists of providing a shaft and rotatably fitting the shaft to a bearing. Hydrodynamic pressure...
5910853 Rotary polygon mirror optical scanning device  
A rotary polygon mirror optical scanning device comprises a fixed shaft and a rotor having a shaft hole, to which the fixed shaft is inserted, and is rotatably supported against an outer perimeter...
5908247 Sinusoidal grooving pattern for grooved journal bearing  
A bearing having two surfaces (60, 72) rotatable with respect to each other, a lubrication medium located in a gap between the tow surfaces during rotation of the bearing and a sinusoidal groove...
5880545 Spindle motor with bearing system having fluid sealing and leakage prevention  
The invention is a spindle motor including a rotor hub bearing a rotational load, lubricant-containing bearing systems rotatably supported by the rotor hub, and stator windings wound on a...
5872409 Bearing system and brushless DC motor using such system  
A bearing system for brushless DC motors is disclosed. The bearing system has an electromagnetic force generator in a bearing so as to generate an electromagnetic force or a magnetic force. The...
5863133 Vertical bearing assembly lubrication  
This invention relates to vertical bearing assemblies employed to support vertically extending rotatable shafts and provide thrust and/or journal bearing support therefor, and in particular relates...
5863134 Bearing without contacting fast spinning shaft  
To achieve an efficacy of allowing a shaft to spin in high speed without contacting the bearing in which the shaft is seated, a bearing is configured to comprise an inner ring which includes: at...
5848844 Fluid bearing  
It is an object of the invention to provide an inexpensive and high-quality fluid bearing which improves the workability in assembly or coupling of a shaft and a rotator. In order to achieve this...
5821655 Magnetic fluid bearing unit structure and motor having the same  
A magnetic fluid bearing unit has a bearing housing, a bearing member having magnetic fluid as a lubricating agent, a rotary body rotatively supported by the bearing member, an upper permanent...
5800068 Spindle for gas bearing of a rapidly rotating tool  
A spindle for a gas bearing of a rapidly rotating tool, including a spindle housing, a bushing arranged in the housing, at least one ceramic bearing pressed into the bushing over substantially the...
5800066 Mechanical assembly of shaft and static pressure bearing  
A mechanical assembly of shaft and static pressure bearing including a static pressure bearing mechanism formed in a shaft. The bearing mechanism includes an air supply chamber, a plurality of air...
5793561 Rotary drum assembly having dynamic-pressure generating mechanism between rotary shaft and bearing  
A rotary drum assembly is arranged so that upper and lower drums can rotate about a central shaft with respect to each other via a dynamic-pressure bearing. In the rotary drum assembly, the central...
5769545 Hydrostatic bearing for supporting rotating equipment, a fluid handling system associated therewith, a control system therefore, method and apparatus  
A bearing for supporting rotating equipment, a fluid handling system associated therewith, a control system therefore, method and apparatus is disclosed in which a rotating shaft is suspended in a...
Matches 51 - 100 out of 228 < 1 2 3 4 5 >