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| Number | Title | Issue Date |
| 8132966 | Rotary flexure and air bearing support for rotary indexing system A highly position-stabilized indexable table or “dial” in which the dial is supported relative to a steel surface on a frame by one or more air bearings. A flexure mechanically connects the indexing motor to the dial in such a way as to be torsionally non-compli... | 03/13/2012 |
| 7878712 | Optical fiber, optical fiber ribbon, and optical interconnection system An optical fiber has a refractive index profile approximated by n(r)=n1[1-2(Δ1/100)(r/a)^α]1/2 when 0 | 02/01/2011 |
| 7293918 | Sliding bearing A sliding bearing (1) includes an upper casing (3) which is made of polyacetal resin as a synthetic resin, has an annular surface (2), and serves as a first bearing body; a second bearing body (5) which is made of a synthetic resin, is su... | 11/13/2007 |
| 7261300 | Hydrodynamic foil face seal A foil thrust bearing forms the primary rotating interface for a film riding face seal. This face seal includes a spring system that will allow the entire assembly to translate axially relative to a static attachment. The complete assembly will form a hybrid foil/fi... | 08/28/2007 |
| 7220054 | Dynamic pressure bearing apparatus A dynamic bearing apparatus which supports a shaft and a bearing so as to be capable of relative rotation by a dynamic pressure of a lubricating fluid. A bottomed screw hole (21a) is provided to at least one end of the shaft (21) to screw a head... | 05/22/2007 |
| 7153028 | Hydrodynamic bearing system The invention relates to a hydrodynamic bearing system particularly for the rotary bearing of spindle motors to drive the platters in hard disk drives which comprises at least one inner bearing part and at least one outer bearing part, the bearing parts being rotata... | 12/26/2006 |
| 7147377 | Crush ring to seal the counter plate on hydrodynamic bearing A fluid dynamic bearing including a shaft rotating within a sleeve and a thrust plate or the like supported at an end of the shaft rotating in a recess defined with the sleeve. The thrust plate faces a counterplate supported from the sleeve over the recess, and the ... | 12/12/2006 |
| 7137739 | High pressure barrier to oil loss by diffusion An improved rotational motor, such as a spindle motor for a disc drive, is provided. The motor first comprises a hub having a shaft portion and a horizontal body portion. The motor also comprises a sleeve surrounding the shaft portion of the hub. A fine vertical gap... | 11/21/2006 |
| 7125169 | Hydrodynamic pivot bearing The present invention provides a bearing comprised of a hydrodynamic bearing and a pivot bearing, which can be used with a spindle motor. It also provides a spindle motor utilizing a hydrodynamic bearing and a pivot bearing. ... | 10/24/2006 |
| 7101085 | Rotating shaft conical fluid dynamic bearing A fluid dynamic bearing design is provided featuring a rotating shaft with at least one conical bearing formed integrally thereon. The shaft is disposed through a stationary sleeve, and a fluid separates the shaft and sleeve surfaces. ... | 09/05/2006 |
| 7042125 | Hydraulic fluid dynamic bearing incorporating an asymmetric journal bearing A fluid bearing design is provided which according to one aspect includes a shaft defining together with a surrounding sleeve an asymmetric journal bearing, and a thrust bearing at or near an end of the shaft towards which the asymmetric journal bearing is pumping, ... | 05/09/2006 |
| 7004119 | Apparatus and method for rotating sleeve engine hydrodynamic seal A hydrodynamic face seal 100 for sealing between the cylinder head 300 and rotating sleeve 200 of a rotating liner engine. The face of the face seal provides a sealing zone 130 for maintaining a lubricant layer of about 2 micrometers betw... | 02/28/2006 |
| 7001074 | High pressure barrier to oil loss by diffusion An improved rotational motor, such as a spindle motor for a disc drive, is provided. The motor first comprises a hub having a shaft portion and a horizontal body portion. The motor also comprises a sleeve surrounding the shaft portion of the hub. A fine vertical gap... | 02/21/2006 |
| 6998745 | Dynamo-electric machine having a rotor with first and second axially or rotationally displacable field magnets An apparatus for and a method of construction of a spindle motor having a bearing unit, a rotary shaft, a rotary hub member and an electro-magnetic motor is presented. The rotary shaft has a flange attached at a mid-section in an axial direction, between large and s... | 02/14/2006 |
| 6955469 | Dynamic pressure bearing device A dynamic pressure bearing device includes a dynamic pressure bearing member, a rotary member that is rotatable with respect to the dynamic pressure bearing member, a thrust dynamic pressure bearing section provided in a thrust opposing region that is between an end... | 10/18/2005 |
| 6952875 | Crush ring to seal the counter plate on hydrodynamic bearing A fluid dynamic bearing including a shaft rotating within a sleeve and a thrust plate or the like supported at an end of the shaft rotating in a recess defined with the sleeve. The thrust plate faces a counterplate supported from the sleeve over the recess, and the ... | 10/11/2005 |
| 6951422 | Low power spindle motor with a stepped shaft A spindle motor for use in a disk drive, the spindle motor including a shaft having a larger diameter section and a smaller diameter section with a step formed therebetween. The spindle motor also includes a bearing sleeve having a central cylindrical opening, the s... | 10/04/2005 |
| 6933643 | Multiple radial/axial surfaces to enhance fluid bearing performance In one embodiment, a plurality of axially oriented bearings defined along gaps between rotor and stator are provided to provide radial stiffness to the system; and these bearings are coupled together by radially oriented gaps. Grooves and/or magnets may be defined i... | 08/23/2005 |
| 6916550 | Method of manufacturing a metal matrix composite structure A method for mechanically cutting a continuous circular shaped groove in a foil sheet for use in a metal matrix composite product. In one form the foil sheet is held adjacent a rotating machine tool by vacuum and a cutting tool is moved relative thereto to cut a spi... | 07/12/2005 |
| 6827495 | Fluid bearing device A spindle motor comprises a hollow shaft 13 having one end formed with a thrust plate 15, and a sleeve 12 provided to face the shaft 13 through a radial fluid bearing clearance R therebetween, wherein a thrust fluid bearing S is formed be... | 12/07/2004 |
| 6499882 | Sliding bearing The improved sliding bearing provides fitting of a cap into a sleeve with steadily fixation of adhesive, and prevention of the remained adhesive outside of the desired area. The sliding bearing comprises a sleeve, a shaft enclosed in said sleeve, and, a c... | 12/31/2002 |
| 6361217 | High capacity thrust bearing A high capacity thrust bearing is disclosed for use in a tubular drilling string to support axial loads resulting from upward or downward jarring forces. The thrust bearing comprises an inner mandrel and an outer housing. A mandrel pressure chamber string... | 03/26/2002 |
| 6354741 | Foil thrust bearing An improved foil thrust bearing includes a pair of members arranged for relative rotation with respect to one another. One of the pair of members is adapted to rotatably support the other. A thrust bearing disk is operatively disposed between the pair of ... | 03/12/2002 |
| 6339515 | Fluid bearing seal and support structure A bearing structure for a spindle motor is disclosed. The bearing structure provides a fluid bearing seal and support structure that may simultaneously addresses the problems of preventing oil leakage, of maintaining the bearing integrity under shock, of ... | 01/15/2002 |
| 6322252 | Discrete fluid dynamic bearings A discrete fluid dynamic bearing comprising a fluid dynamic bearing including a bearing cone mounted on a sleeve and defining in cooperation with a bearing seat having a surface facing an outer surface of the bearing cone across a fluid bearing gap, a fir... | 11/27/2001 |
| 6264368 | Fluid bearing motor A fluid bearing motor having sufficient room for securing an air chamber for use in quickly discharging bubbles that have entered a thrust fluid bearing and a reservoir for supplying a lubricating fluid to the thrust fluid bearing. Moreover, the fluid bea... | 07/24/2001 |
| 6196722 | Hydrodynamic bearing It is an object of the present invention to provide a hydrodynamic bearing which is highly reliable and capable of preventing a lubricant contained therein from flowing out of the bearing. In the hydrodynamic bearing, lower and upper end portions of a sta... | 03/06/2001 |
| 6082901 | Hydraulic axial bearing A hydraulic axial bearing for a radially-mounted axle (1), which has a flange (1a) incorporating an outer, substantially axial sealing gap (7) formed between the flange and a sealing ring (3), and an inner, substantially radial sealing gap (9), formed bet... | 07/04/2000 |
| 6036413 | High speed hydrodynamic spindle A machine tool assembly, and particularly a spindle unit therefor, is provided wherein the spindle unit is relatively small and is designed to run at rotary speeds of between 30,000 rpm's and 40,000 rpm's utilizing hydrodynamic bearings for the spindle sh... | 03/14/2000 |
| 6024495 | Axial sliding bearing The object of the invention is to provide a simple and cost-effective solution for reducing the wear and consequently for increasing the life of axial sliding bearings. For this purpose, the profiled annular surface (24, 24') of the lubricating gap (25, 2... | 02/15/2000 |
| 6024494 | Polymer-backed thrust bearings A product lubricated thrust bearing includes an annular bearing disc made from a hard bearing material such as silicon carbide and having a plurality of radial lubrication grooves in at least one of a front and rear face thereof to define a plurality of b... | 02/15/2000 |
| 6017168 | Fluid assist bearing for telescopic joint of a RISER system An undersea telescopic joint for a riser system is connected to a drilling vessel with a plurality of tensioners. The joint has a bearing with inner and outer annular mating members. A cap seals the outer member to the joint. The outer member closely rece... | 01/25/2000 |
| 5957589 | Fluid bearing seal and support structure A bearing structure for a spindle motor is disclosed. The bearing structure provides a fluid bearing seal and support structure that may simultaneously addresses the problems of preventing oil leakage, of maintaining the bearing integrity under shock, of ... | 09/28/1999 |
| 5941644 | Hydrodynamic bearing It is an object of the invention to provide a hydrodynamic bearing which can be easily worked and assembled and in which a liquid is prevented from leaking. In order to attain the object, in a hydrodynamic bearing including: a shaft having two radial flan... | 08/24/1999 |
| 5900903 | Deflecting scanning apparatus In a deflecting/scanning apparatus, a rotating polygon mirror is rotatably supported by an air bearing constituted by a stationary shaft and a rotating sleeve which are made of a ceramic material. An upper portion of an end face of the rotating sleeve is ... | 05/04/1999 |
| 5876124 | Hydrodynamic bearing unit A self-contained hydrodynamic bearing unit with improved sealing and performance is disclosed. Centrifugal capillary seals are angularly defined between an outwardly tapered outer surface of a top screw and an inwardly tapered inner surface of an annular ... | 03/02/1999 |
| 5791784 | Fluid dynamic pressure bearing and motor and magnetic disk apparatus using fluid dynamic pressure bearing A fluid dynamic pressure bearing has a shaft member, a sleeve member which is relatively rotatable to this shaft member and radial and thrust fluid dynamic pressure bearings. A lubricating oil retaining channel is provided to retain lubricating oil by the... | 08/11/1998 |
| 5791786 | Thrust bearing for a shaft of an open-end spinning rotor An aerostatic bearing is provided for the thrust bearing arrangement of the shaft of an open-end spinning rotor. This aerostatic bearing comprises a bearing plate, which forms a bearing gap with the end of the shaft. An axial thrust, directed against the ... | 08/11/1998 |
| 5765951 | Plain bearing slide shoe with compression spring An axial plain bearing comprising a plurality of slide shoes (2) which are arranged annularly about a bearing axis of rotation, each slide shoe (2) being provided with an annular peripheral recess (52) on an outer circumference thereof, the annular periph... | 06/16/1998 |
| 5743656 | Hydrodynamic bearing apparatus and method for manufacturing same A hydrodynamic bearing apparatus comprises at least two hydrodynamic bearing units which rotatably support a rotation member against a fixed member by hydrodynamic pressure of a lubricant filled in a bearing space. A thrust plate is adhesively bonded on o... | 04/28/1998 |
