Matches 1 - 50 out of 65 1 2 >
Match Document Document Title
7129609 Magneto-fluidic seal with wide working temperature range  
A magneto-fluidic seal includes a shaft; a sleeve surrounding the shaft; a housing made of soft magnetic material surrounding the sleeve; a magnet conducting a magnetic flux to the sleeve; and a...
7011970 Automatic bio-manipulation factory system for manipulating a single cell  
This new automatic bio-manipulation factory system for manipulating a single cell comprises: a bio-MEMS that transports, separates, and extracts a single cell for manipulation from a plurality of...
7005768 Dynamic bearing device, producing method thereof, and motor using the same  
A securing surface of a housing comprises a deformation region, which deforms radially outward by a predetermined quantity during press fitting of a thrust member, and another region. The...
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...
6851638 Rotation support structure for dual-bearing reel  
A rotation support structure for a dual-bearing reel includes a reel unit, a spool shaft, and fluid bearings. The spool shaft is disposed on an inner circumferential side of the reel unit and can...
6787954 Spindle motor  
A downsized spindle motor of excellent abrasion and shock resistance is provided. A shaft is fit into a sleeve. A flange is fixed to an end of the shaft. A radial bearing is formed on faces of the...
6722657 Low torque seal assembly with open cell filter media  
Disclosed is a labyrinth seal assembly for sealing an annular gap defined between a bore of a housing and an outer surface of a cylindrical shaft, wherein the housing and shaft are relatively...
6558042 Bearing guided ferrofluid seal and seal carrier  
A bearing guided ferrofluid seal and seal carrier system that may be used with a bearing assembly with an outer annular ring surface. A seal carrier of the present invention has a carrier...
6305694 Ferrofluid sealing device  
A ferrofluid sealing device retaining a ferrofluid between a shaft and a pair of inner and outer pole pieces rotating in opposite directions, in which grooves are formed on a shaft surface that...
6119553 Rotation transmitting device  
A rotation transmitting device 1 introduces rotation into a vacuum side space 200 via a flexible meshing type gear drive 4 from an atmosphere side space 100. A first spacer 15 is disposed between...
6020664 Electric spindle motor  
An electric spindle motor has a base assembly (19) and a hollow notatable hub (16) housing a motor. The hub (16) is mounted for rotation about an axis and a stator (12) is mounted on the base...
5973878 Recording disk apparatus and rotational supporting structure therefor, having a magnetic lubricant seal which is inclined  
A recording disk apparatus comprises a clearance between a shaft and a thrust bearing portion tapered in a circumferential direction, a lubricant communication groove of a bearing covered by the...
RE36202 Disk spindle motor  
A disk spindle motor having a permanent magnet central shaft. A pair of annular, non-magnetic combination thrust and journal bearings having truncated-conical outer surfaces are spaced apart on the...
5828795 Sealing device for use in a motor  
A sealing device for use in a motor. The motor, which maintains a shaft: and a frame that are interconnected by a bearing, includes a magnetic-fluid-seating device and a collecting device. The...
5810481 Oil retaining bearing unit and motor having oil retaining bearing unit  
Oil retaining bearing members 2a and 2b for supporting a rotative shaft 1 are arranged in a bearing housing 7 with an interval. The bearing housing 7 has a bottom portion, one end being opened and...
5793135 Flat type brushless motor  
To provide a bearing structure of a flat type brushless motor for floppy disk drive in which a stator is arranged in a plane shape and a disk acting as a rotor yoke rotates along the plane shape...
5789836 Motor having dynamic pressure bearing device  
A motor having a dynamic pressure bearing device equipped with a rotor having a driving coil or a driving magnet, and a stator having the other of the driving coil or the driving magnet, the...
5778948 Method for inserting a fluid in a bearing device  
A method for inserting fluid in a bearing device containing a fixed member and a rotating member. The fixed member and the rotating member of the bearing device are assembled in a high pressure...
RE35718 Bearing apparatus  
A bearing apparatus comprises a housing formed of a non-magnetizable material and having a bottom portion, a fluid lubricating type radial bearing device provided coaxial with the housing and...
5676472 Rotary labyrinth seal  
A rotary seal is located in a gap between an inner surface and an outer surface. A radial bearing allows the inner and outer surfaces to rotate relative to each other. A radial barrier includes a...
5667309 Bearing seal system  
A bearing seal system having a bag structure in a first embodiment wherein (1) oil is filled in a tapering bag space section positioned from the bag section to an exit section; (2) the space in the...
5653541 Disk driving motor  
A magnetic disk driving device includes a frame which supports a shaft, a hub adapted to hold a disk, and upper and lower bearings which are fitted in a bearing holding hole and rotatably support...
5645355 Bearing unit  
A bearing unit in which two oil sintered slide bearings are fitted in a bearing space of non-magnetic bearing housings to be spaced away from each other and a magnetic fluid is interposed between a...
5628569 Fluid bearing unit and manufactured method thereof  
A fluid bearing unit includes a shaft; a bearing; bearing fluid arranged between a shaft and a bearing which are rotatably engaged with each other so that they can be relatively rotated so as to...
5417507 Vertical motor, method of manufacturing same, polygon mirror motor using said motor, and bearing device for use in said motor  
There is disclosed a polygon mirror motor in which an annular projection is formed on an upper surface of a rotor support member supporting a polygon mirror, and the annular projection supports a...
5372432 Dynamic pressure bearing assembly  
A dynamic pressure bearing with a magnetic fluid sealed therein is reduced in size without degrading the bearing performance and includes a sleeve 5 having an insertion hole 6 axially formed...
5256952 Magnetic bearing control method and apparatus  
A control method and apparatus for suppressing the vibration components of a magnetic bearing. According to this invention, a vibration wave is sampled at pulses synchronized with the rotation of a...
5238254 Ferrofluid seal apparatus  
A ferrofluid seal apparatus comprises magnetic fluid holding means for storing a magnetic fluid with one of an inner and an outer elements which are relatively rotated. The magnetic fluid holding...
5165701 Magnetic fluid seal apparatus  
A magnetic fluid seal apparatus adapted to prevent a magnetic fluid from being displaced along a shaft or housing during linear motion of the shaft. In the apparatus of the bore mounted type, a...
5161900 Self-contained low power fluid bearing and bearing seal  
A bearing using magnetic fluid for lubrication is provided with a magnetic seal circuit to retain the magnetic fluid in the baring. The magnetic seal circuit comprises two annular ring magnets...
5155640 Disk spindle motor cap  
The present invention is a disk spindle motor cap. By affixing the cap to the cylindrical shaft of a disk drive, the amount of magnetic ferrofluid escaping from the well between the hub and the...
5110141 Spindle assembly  
Apparatus for restricting magnetic oil to a desired location within a FFFB comprising selectably locatable stopper apparatus having a first location near the FFFB for enabling a vacuum to be...
5108198 Magnetic fluid bearing apparatus and motor having magnetic fluid bearing apparatus  
A sliding bearing an an end ring are mounted on a housing. A magnetic fluid sealing member comprises a permanent magnet and a magnetic fluid. A space is formed between the magnetic fluid sealing...
5059039 Magnetic bearing bushing  
A bearing bushing incorporating a sleeve (1) of magnetizable material forming the sliding surface of the bearing, a shaft (2) mounted in said sleeve (1) and a lubricant in the form of a magnetic...
5054939 Magnetic sliding bearing  
A sliding bearing which is mounted on a shaft (2) and is composed by a magnetized material, whereby between the sliding bearing (1) and a surrounding bearing housing (5) is provided a magnetic...
5036235 Brushless DC motor having a stable hydrodynamic bearing system  
A brushless DC motor having a hydrodynamic bearing system includes a stator core having windings arranged thereabout, the stator core rotating about a first center line. The motor further includes...
5032751 Magnetic fluid bearing  
A magnetic fluid bearing may include a sleeve provided with a through bore, a shaft inserted into the bore, electromagnets engaged with the bore of the sleeve with a gap provided between the shaft...
5011165 Sealing device especially for hard disk drives  
A seal includes a magnetic circuit having a permanent magnet providing excitation. A rotatable shaft has a straight cylindrical outer surface and is supported in a ball bearing system. A...
5005639 Ferrofluid piston pump for use with heat pipes or the like  
A long life, very low friction pump for use in a heat pipe pump or the like is disclosed. A first pump uses magnetically confined ferrofluid rings as both sealer and lubricant for a sliding pump...
4995622 Magnetic fluid seal device  
A magnetic fluid seal device, with two or more pole pieces disposed around a magnetic rotating element on both sides of a permanent magnet, each pole piece being formed by alternately joining and...
4955731 Bearing equipment for vacuum devices  
A bearing for a vacuum device having an annular permanent magnet disposed about a rotatable shaft which has one end exposed to low pressure and the other end exposed to atmospheric pressure in...
4919550 Bearing assembly  
Bearing assembly, in particular for an electric motor of a household appliance, which has a bearing sleeve of a synthetic material forming the running surface of the bearing, a shaft mounted in...
4883367 Bearing unit  
In a bearing unit using a hydrodynamic lubrication film (5 or 25) of a lubrication fluid, a shaft (2 or 22) comprises plural spiral grooves (6a, 6b or 26) thereon, at least one circumference groove...
4842426 Bearing assembly  
A bearing assembly comprised of a housing, a shaft extending through the housing, a bearing disposed between the housing and the shaft and a seal disposed among the housing, the shaft and the...
4824122 Compact magnetic fluid low pressure seal  
A bearing and magnetic fluid seal assembly includes a shaft mounted by axially spaced-apart bearings for rotation relative to a housing. A magnetic fluid seal includes an annular magnet axially...
4817964 Ferrofluid exclusion seal and method of assembly  
A ferrofluid seal apparatus and a method of assembling the seal apparatus, the seal apparatus comprising a housing, an annular permanent magnet and at least one annular pole-piece element, and a...
4809354 Hydrostatic bearing utilizing a ferromagnetic fluid  
A hydrostatic bearing system utilizing ferromagnetic fluid exclusively as working fluid including that used for sealing for preventing the ferromagnetic fluid itself from escaping outside the...
4765756 Rolling bearing  
A rolling bearing comprising an outer race and an inner race situated coaxially therein both races defining an annular space therebetween and a row of rolling members in the annular space between...
4761082 Roller bearing  
A rolling bearing comprising at least one outer and one inner race situated coaxially therein and a row of rolling members situated in a space between these races and first and second seals for...
4734606 Electric motor with ferrofluid bearing  
An electric motor including an integral ferrofluid bearing provides significant reduction in non-repeatable runout, stray flux, and audible noise over conventional motors using ball bearings. The...
Matches 1 - 50 out of 65 1 2 >