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| Number | Title | Issue Date |
| 7343002 | Bearing assembly A bearing assembly suitable for use in conjunction with x-ray device having a rotating target anode and electron source disposed in an evacuated enclosure. The bearing assembly includes a shaft having a rotor hub to which the anode is mounted. The shaft cooperates w... | 03/11/2008 |
| 7188840 | Magnetic fluidic seal with improved pressure capacity A magnetic assembly for a multistage magnetic fluid rotary seal has a shaft, an annular permanent magnet, at least one pole piece and a radial gap formed between the shaft and the pole piece. The shaft and the pole piece have a plurality of trapezoidal-shaped ridges... | 03/13/2007 |
| 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 magnetic fluid in a gap between the sleeve and the shaft, and/or in a g... | 10/31/2006 |
| 7023119 | Device comprising a plain bearing A motor, suitable for driving a fan, features a plain bearing (36) that contains ferromagnetic material and serves for radial support of a rotor shaft (34) made of ferromagnetic material. The shaft (34) is arranged rotatably and axially displace... | 04/04/2006 |
| 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 cells, controls the rotation-orientation of the extracted cell automat... | 03/14/2006 |
| 7009310 | Autonomous power source An autonomous power source comprises a power harvester mounted on a movable structure. The power harvester includes a coil, a magnet, and a low-friction ferrofluidic bearing in contact with the magnet, arranged such that the magnet and coil move with respect to each... | 03/07/2006 |
| 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 deformation region has a tapered shape that gradually reduces in diameter in t... | 02/28/2006 |
| 6966699 | Dynamic pressure bearing device, and manufacturing method and assembly jig thereof It is an object of the present invention to provide a miniaturized, high-precision, easy, and low-cost dynamic pressure bearing device and a manufacturing method thereof. In manufacturing a dynamic pressure bearing device, a first and a second ring-shaped member are... | 11/22/2005 |
| 6917130 | Top cover attachable fluid dynamic bearing motor A single thrust bearing fluid dynamic bearing (FDB) design, including a typical dynamic bearing design which has a ring-shaped or circular thrust plate mounted at or near the end of a shaft, wherein the shaft defines together with the surrounding sleeve a journal be... | 07/12/2005 |
| 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 rotate relative to the reel unit. The fluid bearings have a plurality ... | 02/08/2005 |
| 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 by impregnation with a resin; a non-magnetic housing 90 | 02/08/2005 |
| 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 shaft and the sleeve, which faces are opposite and close to each othe... | 09/07/2004 |
| 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 movable. The seal assembly includes radially inner and radially outer shie... | 04/20/2004 |
| 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 ferrofluid seal surface and a carrier bearing surface that includes... | 05/06/2003 |
| 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 faces the inner diameter surfaces of pole pieces. In the seal... | 10/23/2001 |
| 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 ball bearings 13 and 14 of a rotation output shaft 5 positi... | 09/19/2000 |
| 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 assembly (19) inside the hub (16). A liquid filled journal bear... | 02/01/2000 |
| 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 shaft so that a lubricant on a radial bearing portion commun... | 10/26/1999 |
| 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 magnetic-fluid-sealing device seals the bearing with a magneti... | 10/27/1998 |
| 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 another end being closed. A porous spacer 3 for supplying ... | 09/22/1998 |
| 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 without the use of conventional ball bearings so that the be... | 08/11/1998 |
| 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 dynamic pressure bearing device comprising a shaft fixed to the ... | 08/04/1998 |
| 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 environment and subsequently placed in a low pressure environ... | 07/14/1998 |
| 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 plurality of annular outward-pointing flanges attached to t... | 10/14/1997 |
| 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 tapering space section is kept to 0.8 mm or less the slop... | 09/16/1997 |
| 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 the hub. The frame includes a cylindrical protrusion which ... | 08/05/1997 |
| 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 rotary shaft and the oil sintered slide bearings to rotat... | 07/08/1997 |
| 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 generate dynamic pressure in the bearing fluid, wherein at l... | 05/13/1997 |
| 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 part of a lower surface of the polygon mirror. Radial beari... | 05/23/1995 |
| 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 therein fixed in a housing 1, and a pair of pole pieces 9a, 9b d... | 12/13/1994 |
| 5323076 | 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 shaft. The bearings coact with complementary surfaces of ... | 06/21/1994 |
| 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 rotor, the vibration waveform sampled values at each revo... | 10/26/1993 |
| 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 means has a storage section for storing a part of the magne... | 08/24/1993 |
| 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 pole piece is hermetically fixed within a bore of the housing... | 11/24/1992 |
| 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 surrounding a shaft and placed on opposite sides of the bearin... | 11/10/1992 |
| 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 cylindrical shaft of the disk spindle assembly is reduced.... | 10/13/1992 |
| 5134331 | Spindle motor A spindle motor includes a bracket, a shaft member fixed to the bracket, a hub member rotatably mounted on the shaft member with a bearing member therebetween, a rotor magnet mounted on the hub member, a stator disposed in opposed relation to the rotor ma... | 07/28/1992 |
| 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 produced and for restricting the magnetic oil within the FFFB du... | 05/05/1992 |
| 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 member and a lubricating fluid. A shaft has projection membe... | 04/28/1992 |
| 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 fluid (3) between the sliding surface of the sleeve (1) and ... | 10/22/1991 |
