Abstract: An apparatus and method are described for a fluid dynamic bearing motor as may be utilized in a disc drive memory system. A fluid seal is situated at a first axial end of a bearing, and a grooved pumping seal is situated at a second axial end of the bearing. In an aspect, a fluid recirculation passageway is defined through a shaft and a thrustplate, to recirculate fluid from axially above the grooved pumping seal at the second axial end of the bearing to the first axial end of the bearing. Any air ingested at the grooved pumping seal, or which came out of solution from the fluid, is purged into a fluid reservoir and out the fluid seal. In an aspect, fluid is recirculated from the center of the journal bearing and the bearing pressure grooves to the fluid recirculation passageway and toward an air purging fluid seal.

Abstract: A system and method for improving lubrication in a fluid dynamic bearing are disclosed. A fluid dynamic bearing is formed. The fluid dynamic bearing comprises a shaft having an axis of rotation and a surface comprising a first groove at a first depth and a second groove at a second depth, wherein the first and second grooves are for supporting a film of lubricating fluid. The fluid dynamic bearing further includes a hub having an axis coincident to the axis of rotation and a complimentary surface juxtaposed to the shaft which is conducive to supporting the lubricating fluid such that the shaft is rotatably retained.

Abstract: A hydrodynamic bearing device includes a sleeve having a bearing hole, a shaft, and a flange cover. The shaft is disposed in the bearing hole of the sleeve in a state of being capable of relative rotation, and has a large diameter flange portion. The flange cover is disposed opposite the bottom surface of the flange portion. A bubble suppression portion, which is formed as a recess on the bottom surface of the shaft, communicates with the upper surface of the flange portion through a communicating hole in the flange portion. This provides a hydrodynamic bearing device with which negative pressure is prevented from being generated in the bearing even when it is subjected to impact or vibration, and durability and reliability can be enhanced, as well as a spindle motor and a recording and reproducing apparatus equipped with this hydrodynamic bearing device.

Abstract: One embodiment of the present invention is a unique turbine engine. Another embodiment is a unique turbine engine powered system. Another embodiment is a hybrid bearing system for use in a turbine engine and/or a turbine engine powered system. Other embodiments include apparatuses, systems, devices, hardware, methods, and combinations for hybrid bearings, turbine engine systems with one or more hybrid bearings and turbine engine powered systems with one or more hybrid bearings. Further embodiments, forms, features, aspects, benefits, and advantages of the present application shall become apparent from the description and figures provided herewith.

Abstract: A hydrodynamic bearing type rotary device includes radial hydrodynamic grooves and thrust hydrodynamic grooves forming communicating channels, communicating holes designed to communicate the groove end of the radial hydrodynamic groove on the side opposite the thrust hydrodynamic grooves with the groove end of the thrust hydrodynamic groove on the side opposite the radial hydrodynamic grooves, and a circulation route composed by the communicating hole, the radial hydrodynamic groove, and the thrust hydrodynamic groove. Lubricating oil is circulated by means of a pump force of the hydrodynamic groove. The hydrodynamic bearing device prevents the formation of low-pressure parts from the bearing portion, preventing the accumulation of air bubbles, and thereby preventing the occurrence of oil film breakage at the radial hydrodynamic groove and the thrust hydrodynamic groove.

Abstract: A hydrodynamic bearing device being low in torque, low in power consumption, high in reliability and best suited for miniaturization and a spindle motor using the same. The hydrodynamic bearing device in accordance with the present invention, dynamic pressure generation grooves being provided on at least one of a shaft or a sleeve, and a lubricant being present in a clearance where the above-mentioned shaft and the above-mentioned sleeve are opposed to each other, is characterized in that the above-mentioned lubricant contains diesters obtained from a divalent alcohol having 4 to 8 carbon atoms and having no alkyl side chain at the ? position and one or more kinds of saturated monovalent fatty acids having 9 to 13 carbon atoms.

Abstract: A hydrodynamic bearing assembly according to an aspect of the invention may include: a sleeve against which a shaft is supported so that an upper end of the shaft, being compressed and inserted into a hub base of a rotor case, protrudes upwardly in an axial direction; a first oil sealing unit having a first oil interface provided between the hub base and a counterpart component arranged downwardly in the axial direction; and a second oil sealing unit communicating with the first oil sealing unit through a communication channel and being tapered to form a second oil interface inside or outside the sleeve, wherein oil in the first oil sealing unit moves toward the second oil sealing unit along an inner diameter direction by a rotation of the rotor case.

Abstract: In order to improve retention strength of a lid member without increase in size and reduction in bearing property of a bearing device, a fluid dynamic bearing device (1) includes: a shaft member (2); a bearing sleeve (8) which forms a radial bearing gap between the bearing sleeve and an outer peripheral surface of the shaft member (2); a housing (4) which accommodates the bearing sleeve (8) and is opened at both ends; and a lid member (10) which closes an opening on one end side of the housing (9) and forms thrust bearing portions (T1 and T2). The housing (9) is an injection-molded product into which the bearing sleeve (8) is inserted, and the housing (9) has another end with which a seal portion (9b) forming a seal space (S) is integrally formed. The lid member (10) is fitted with the outer peripheral surface of the housing (9) by loose fitting so that the lid member (10) and the housing (9) are bonded and fixed to each other.

Abstract: Reliability of a mechanical part including two parts fixed to each other by an anaerobic adhesive is improved, at least one of the two parts being made of a resin material. After UV treatment is performed on an adhesive surface (10) with respect to a bracket (6) of an outer peripheral surface (7a1) of a housing (7) made of the resin material, the housing (7) is fixed to the bracket (6) by the anaerobic adhesive, whereby an adhesive strength per unit area of 8 N/mm2 or more is obtained for both parts. The UV treatment is performed by irradiating an electromagnetic wave, of an electromagnetic wave irradiated from a light source (11), transmitted through an infrared cut filter (12) having a transmittance of 50% or more and 80% or less in an electromagnetic wave having a wavelength of 254 nm, onto the adhesive surface (10) of the housing (7).

Abstract: A bearing device is composed of a shaft, a sleeve for supporting the shaft so as to be rotatable freely and a housing having a through hole into which the sleeve is inserted. A circumferential groove that extends in a circumferential direction is formed on either one surface of an outer circumferential surface of the sleeve and an inner circumferential surface of the housing. An axial groove that extends approximately in parallel to a central axis of the sleeve is formed on either one surface of the outer circumferential surface of the sleeve and the inner circumferential surface of the housing. The outer circumferential surface of the sleeve is glued to the inner circumferential surface of the housing by adhesive that intervenes in both the circumferential groove and the axial groove.

Abstract: A motor is disclosed. In accordance with an embodiment of the present invention, the motor includes a stator and a rotor, which is supported by the stator such that the rotor rotates. Here, the rotor includes a rotational axis, which is supported by the stator such that the rotational axis rotates, a rotating body, which rotates together with the rotational axis, and a hub, which has a ring-shaped body and a protruding part. Here, the ring-shaped body is interposed between the rotational axis and the rotating body, and the protruding part extends an outer circumferential surface of the ring-shaped body coupled to the rotating body. Thus, the motor can improve the coupling strength between the rotational axis and the rotating body, securing the rotating rotor's stability.

Abstract: Gas journal bearing systems are provided. An exemplary gas journal bearing system comprises a vortex generator, a housing and a journal. The vortex generator is operative to receive a flow of gas and to impart an angular acceleration to the gas. The housing is in fluid communication with the vortex generator, with housing having a first exhaust through which the gas is exhausted. The journal is supported within the housing by a vortex of the gas as the gas swirls along at least a portion of a length of the journal. Methods and other systems also are provided.

Abstract: A retaining structure for motor elements includes an axial tube and a cap. The cap includes a stop and a coupling portion. At lease one motor element is received in the axial tube. The coupling portion of the cap is engaged with a coupling section of the axial tube for securely mounting the cap to the axial tube, with the stop of the cap covering an end of the axial tube to prevent the motor element from disengaging from the axial tube. In another example, the coupling portion of the cap engages with a coupling section on a stator.

Abstract: A hydrodynamic liquid metal bearing capable of use in a high temperature environment. The hydrodynamic bearing includes a rotating shaft with a raised portion extending into an annular groove formed within a stationary sleeve, the space formed between the two forming the liquid bearing surface. The raised portion in the shaft includes an axial passage and a radial passage to pump the liquid into a high pressure cavity formed in the annular groove. A low pressure cavity forms a recirculating passage with the high pressure cavity and the axial and radial passages such that the liquid metal recirculates with the rotation of the shaft. A collecting space formed between a labyrinth seal and a wind back seal collects any fluid that leaks into the space from the bearing. The leaked fluid is collected in a reservoir, and a pump delivers makeup liquid from the reservoir into the low pressure reservoir of the bearing. The bearing is a radial bearing, and in another embodiment is both a radial and a thrust bearing.

Abstract: A fluid dynamic bearing system used particularly for a spindle motor having a shaft that is accommodated in a bearing bush and rotatably supported with respect to the bearing bush, a bearing gap filled with a bearing fluid being located between the shaft and the bearing bush. At least the outside circumference of a section of the shaft extending into the bearing bush is made of a plastic material. As an alternative, a film made of a plastic material whose thickness is less than the width of the bearing gap can be disposed in the bearing gap.

Abstract: A hydrodynamic bearing (300) has a bearing surface adapted for receiving a shaft to rotate thereon. The bearing surface has a plurality of grooves (34) defined therein. The grooves for generating hydrodynamic pressure each has at least one interior surface (3421). The at least one interior surface has a sloping surface along a circumferential direction of the hydrodynamic bearing.

Abstract: The invention relates to a spindle motor having a fluid dynamic bearing system that comprises a base (10), a stationary shaft (14) connected to the base, a hub (16) rotatably supported with respect to the shaft and two bearing plates (24, 44) that are disposed at a mutual spacing about the shaft and connected to the hub. A bushing (22) is provided that is disposed between the bearing plates and separated from them by a gap (30, 50) at least partly filled with a bearing fluid. There are two stopper plates (26, 46) that are fixedly connected to the shaft, each abutting one side of each bearing plate and separated from the bearing plate by a bearing gap (28, 48) filled with bearing fluid. This results in two independent fluid dynamic bearing systems, each of which is disposed about a bearing plate. The motor is driven by an electromagnetic drive system.

Abstract: A slide bearing for a rotating anode has a stationary bearing part, and multiple rotatable bearing parts are arranged concentrically around the stationary bearing part or within the stationary bearing part. The bearing parts have bearing surfaces between which are located bearing gaps filled with a fluid medium. The sliding friction of slide bearings can be markedly lowered with fluids given rotation frequencies greater than 200 Hz. At the same time the excellent heat dissipation is retained.

Abstract: As axis direction dimensions become smaller in HDD spindle motors as a result of thinner and more compact designs, there is a demand for hydrodynamic bearings with a long lifespan. As a means of solving this problem, a lubricant reservoir section is formed between a sleeve side surface and a cover side surface with a depth varying in a circumferential direction, lubricant is circulated in a bearing gap section, a sleeve end face gap section larger than a bearing gap between a sleeve end face and the cover, and a connecting channel, and the lubricant reservoir section and the sleeve end face gap section are connected via an introducing gap section having a bubble separation function.

Abstract: 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 providing grooves on only one of the two surfaces facing the gap between the shaft and sleeve. On the ring shaped thrust plate supported by the shaft, the traditional upward thrust bearing defined between the lower face of the thrust plate and the facing surface of the sleeve is maintained; but no grooves are on the surface of the thrust plate distant from the shaft and a facing counterplate surface. Further, the journal bearing is defined to have an asymmetry so that a bias force pressure along the surface of the shaft toward the thrust plate is established.

Abstract: A hydrodynamic bearing (300) has a bearing surface adapted for receiving a shaft to rotate thereon. The bearing surface has a plurality of grooves (34) defined therein. The grooves are used for generating hydrodynamic pressure. A depth of each of the grooves is changed in a sloping trend along the extension direction of the groove.

Abstract: An aerostatic bearing including a first bearing surface (28); a second bearing surface (32) which is juxtaposed to face the first bearing surface (28) and at least one fluid inlet (38) provided in one of the first and second bearing surface (28), (32). An inlet restriction (40) for restricting a flow rate of compressible fluid to and/or from said fluid inlet (38) and at least one recess (34) are provided in one of the first and second bearing surfaces (28, 32); the or each said recess (34) being in fluid communication with the or each said fluid inlet (38). There is also provided at least one outlet restriction (35) which is in fluid communication with the said at least one recess (34) and which restricts a flow rate at which compressible fluid exits the bearing; and at least one protrusion (42) which is provided on a surface defining at least part of the said at least one recess (34). The/each protrusion (42) lies entirely within said at least one recess (34).

Abstract: A hydrodynamic bearing device comprises a sleeve, a shaft, and a flange cover. The sleeve has a bearing hole and a communicating hole which communicates between both end faces. The shaft is disposed in a state of being capable of relative rotation in the bearing hole of the sleeve, and has a main portion, a flange that is larger in diameter than the main portion, and a communicating hole that communicates with both end faces of the flange. The flange cover is disposed opposing to the lower face of the flange. The pressure loss at the communicating hole is smaller than the pressure loss at the communicating hole.

Abstract: A hydrodynamic bearing device, comprising a shaft structure, a sleeve, a dynamic pressure-generating groove which is formed on surface of at least one of a shaft structure and a sleeve, and a lubricant present in a gap between the shaft structure and the sleeve; wherein the lubricant contains a diester with a total carbon number of 20 to 28 obtainable by a divalent alcohol that has three ether bond, and one or more types of a saturated monovalent fatty acid with carbon number of 6 to 10.

Abstract: A hydrodynamic bearing, a motor including the same, and a recording and reproducing apparatus which can improve vibration resistance property and suppress noises even in a situation where vibration is expected are provided. Radial hydrodynamic grooves formed on an inner peripheral surface of a sleeve have a shape which satisfy the relational expression L2<L1/2. L1 refers to a length of a hydrodynamic causing portion of a radial bearing portion in an axial direction; and L2 refers to a length in the axial direction from a benchmark point where an end portion of the radial bearing portion on an outward side in the axial direction and center of a predetermined radial hydrodynamic groove cross each other, to a relative rotational direction backward side end portion of a radial hydrodynamic groove adjacent to the predetermined radial hydrodynamic groove on the forward side in a relative rotational direction.

Abstract: Some embodiments relate to a compact noncontact mechanical coupling, damping, and/or load bearing device comprising an internal load bearing member and an external load bearing member mated in an interdigitated relation while maintaining a gap therebetween. Some embodiments include a means for maintaining the gap between the internal and external load bearing members including, without limitation, hydrostatic means, hydrodynamic means, electrorheological fluids, magnetorheological fluids, electric fields, and/or magnetic fields.

Abstract: A gas bearing spindle includes a rotation shaft, a sleeve, and a housing. The sleeve includes a bearing portion formed of a nonmetallic sintered body; and a retaining ring formed of a metal. Further, the retaining ring and the bearing portion are in contact with each other at a first fit surface that is a boundary surface between the outer circumferential surface of the bearing portion and the inner circumferential surface of the retaining ring, as well as at a second fit surface that is a boundary surface between the outer circumferential surface of the bearing portion and the inner circumferential surface of the retaining ring, is distant further away from the sleeve through hole relative to the first fit surface, and is formed adjacent to a center of the sleeve through hole in a direction in which the sleeve through hole extends, when viewed from the first fit surface.

Abstract: A fan with an anti-leakage device for an oily bearing includes a base, an axial barrel, a fan wheel and a bearing. The axial barrel extends from the base and provides a first end, a second end, a first oil storage groove at the second end. The fan wheel extends a spindle from the inner side thereof and provides a joining part surrounding an end of the spindle and being adjacent to the inner side of the first end. The bearing is received in the axial barrel and further includes an axial through bore, which provides two inverted cone shaped ends, and at least a second oil storage groove, which is provided at a wall surface of the axial through bore for being adjacent to the spindle closely. Thus, a closed circuit is formed for the lubrication oil flowing back to the bearing without leakage.

Abstract: Assembly precision in a motor is improved and greater cost reduction is achieved. A fluid dynamic bearing apparatus includes a housing and bearing sleeve as fixed-side members, a shaft member as a rotational-side member having a portion for mounting a rotor magnet, and a disk hub. The shaft member is supported by the bearing sleeve in the radial direction in a non-contact manner by the hydrodynamic effect of a lubricating oil produced in a radial bearing gap between the inner circumferential surface of the bearing sleeve and the outer circumferential surface 9 of the shaft member while the shaft member is in rotation. The apparatus includes a disk hub which is fixed on the shaft member and has a portion for mounting the rotor magnet, and the disk hub is a molded resin article formed by insert-molding using the shaft member as an insert piece.

Abstract: In an apparatus for manufacturing a fluid dynamic bearing, a housing portion defines a first work area. A vacuum pump discharges air in the first work area. A lubricant discharge device is arranged in the first work area, and discharges a lubricant into an inlet of a reservoir for storing the lubricant of the fluid dynamic bearing. At least one aperture is provided in the housing portion. A first door closes the aperture and a second door closes the aperture. Between the first door and the second door, when both have closed the aperture, a second work area is formed where the fluid dynamic bearing is placed.

Abstract: Provided is a fluid dynamic bearing device, which fixes a lid member (10) to a bracket (6) or forms the lid member (10) and the bracket (6) integrally so that the bracket (6) exerts the release resistance of the lid member (10). As a result, the fluid dynamic bearing device can alleviate a fixing force required between a housing (7) and the lid member (10) or can make their fixture unnecessary, to thereby maintain the release resistance of the lid member (10) irrespective of a material of the housing (7).

Abstract: The present invention provides a fluid dynamic bearing device having high durability and capable of being produced at low cost. In the fluid dynamic bearing device, a housing and a disc hub are resin molded parts, and a thrust bearing gap is formed between an upper end surface of the housing and a lower end surface of the disc hub. In this case, the surfaces function as sliding portions temporarily in sliding contact with each other during operation of the bearing. A diameter of PAN-based carbon fibers blended as reinforcement fibers in the resin housing is 12 ?m or less, and the blending amount is within a range of 5 to 20 vol %, thereby making it possible to prevent occurrence of flaws and wear in the sliding portions.

Abstract: A linear compressor includes a piston housing having a plurality of gas permeable openings therein and a compressor piston configured for reciprocatory motion therein along an axis, the compressor piston being supported in the piston housing by gas flowing through the openings and wherein the housing wall is porous.

Abstract: A bearing is mounted in an axle tube of a motor and includes an axial hole for rotatably receiving a shaft of the motor. At least one guiding groove is defined in a peripheral wall defining the axial hole. The guiding groove extends axially from an end face toward but spaced from the other end face. The guiding groove includes a deposit space formed at a bottom thereof for receiving carbide and impurities to enhance the lubricating effect and to prolong the life of the motor.

Abstract: The invention relates to a fluid dynamic bearing system particularly for the purpose of rotatably supporting a spindle motor, having a first bearing part that comprises a bearing sleeve, and a second bearing part that comprises a shaft, the two bearing parts being spaced apart from one another by a bearing gap and being rotatable with respect to each other, wherein the bearing sleeve is closed at one end by a counter plate that is accommodated in an annular recess in the bearing sleeve and connected to the bearing sleeve by a welded joint. According to the invention, a bearing system is provided in which the counter plate has a reduced thickness (D2) at its outer edge and is welded in the region of its reduced thickness (D2) to the bearing sleeve. The reduced thickness of the counter plate at the region of its outer edge means that the vertical gap between the bearing sleeve and the counter plate is made very much shorter, or is done away with altogether, so that no unwanted air can remain in the gap.

Abstract: There is provided a dynamical pressure bearing device, a motor and a recording drive device. The dynamical pressure bearing device has a shaft having a first bearing surface and a first portion exteriorly adjacent to the first bearing surface; and a sleeve having a second bearing surface and a second portion exteriorly adjacent to the second bearing surface. The sleeve is rotatably engaged with the shaft with a clearance. The oil repellent film includes a fluorine polymer having a perfluoroalkyl group; and a chromogenic substance which makes color development in blue at UV irradiation.

Abstract: A smooth surface of a shaft member is divided from an outer circumferential surface by a step so that its axial length dimension becomes shorter than the axial length dimension of a hydrodynamic groove region formed on the inner circumferential surface of a bearing sleeve, whereby the hydrodynamic groove regions excluding lower portions of a land between hydrodynamic grooves oppose the smooth surface.

Abstract: A bearing unit (90) for rotatably supporting a shaft (100) comprises a seamless holding member (120) with a gap allowing a shaft to run through and extend to the outside, a bearing (130) arranged in the inside of the holding member to rotatably support the shaft so as to make it radially revolvable, an anti-shaft-release member (115) fitted to the shaft so as to abut the bearing in order to prevent the shaft from slipping away in the thrusting direction and a space-forming member (113) arranged in the inside of the holding member so as to secure a space around the anti-shaft-release member. A bearing unit may further comprise an lubricating oil seal member and the space-forming member may be used to form a passage way for lubricating oil to prevent lubricating oil from leaking.

Abstract: A system and method for filling hydrodynamic bearings with fluid. The fluid filling system includes a vacuum vessel for receiving the hydrodynamic bearing therein, a pump hermetically connected to the vacuum vessel and exhausting air from the vacuum vessel to the outside, an ultrasonic generator for generating vibrations in the vacuum vessel, and a fluid dispenser for dripping the fluid into the hydrodynamic bearing. When air is exhausted from the vacuum vessel to the atmosphere by the pump, the hydrodynamic bearing is vibrated by the ultrasonic generator and air is exhausted from a micro-gap between the shaft and sleeve of the bearing the atmosphere.

Abstract: One embodiment of the present invention provides a motor comprising a stator portion including a bearing using lubricant oil; and a rotor portion having a rotation shaft rotatably supported by the bearing, an oil deflector configured to return back to the bearing the lubricant oil that has leaked toward one end portion of the rotation shaft from the bearing, and a hub attached so as to oppose the oil deflector with a clearance therebetween.

Abstract: The present invention is generally directed to an apparatus providing real time adaptive active fluid flow cooling, for cooling an electronic system, an electronic system utilizing the same, and a method for providing real time adaptive active fluid flow cooling. The electronic system consists of a circuit board having a heat generating component, a heat dissipating element mounted to the heat generating component and an apparatus for providing real time adaptive active flow cooling. The apparatus consisting of a plurality of active cooling devices that remove heated air or fluid with ambient air or fluid by propelling an fluid flow stream in a first direction toward the heat dissipating element, and where at least one active cooling device contained in the plurality of active cooling devices propels an fluid flow stream in a second direction toward the heat dissipating element.

Abstract: A bearing structure which is cooperated with a shaft and is disposed in a bearing tube comprises an oil bearing and a cylindrical sealing member. The oil bearing has an axial hole. The shaft passes through the axial hole. The cylindrical sealing member covers a top surface and at least a portion of a sidewall of the oil bearing. The cylindrical sealing member has a through hole defined in its center. The shaft passes through the through hole.

Abstract: Disclosed is a fluid dynamic bearing device in which it is possible to prevent detachment of the shaft member reliably and at low cost without involving any increase in the device size. In a thrust bearing portion T, the lower end surface of the shaft member is held in contact with a thrust plate, and the shaft member is rotatably supported in the thrust direction. Protrusions extending radially inwards are provided on a sealing portion attached to an opening of the housing, and these protrusions are engaged with a small diameter portion formed on the outer peripheral surface of the shaft member, thereby preventing the shaft member from coming off.

Abstract: A system and method for filling hydrodynamic bearings with fluid are disclosed. The fluid filling system of the present invention includes a fluid storage tank to store fluid therein, a vacuum vessel to receive a hydrodynamic bearing therein, a fluid dispenser for connecting the fluid storage tank to the vacuum vessel and dripping the fluid into a micro-gap of the hydrodynamic bearing, a pump connected both to the fluid storage tank and to the vacuum vessel and separately exhausting air from both the fluid storage tank and the vacuum vessel to the outside, and a nitrogen storage tank for separately controlling pressure in both the fluid storage tank and the vacuum vessel, wherein the fluid storage tank is pressurized using nitrogen such that the pressure in the fluid storage tank becomes higher than the pressure in the vacuum vessel, thus causing the fluid to move to the vacuum vessel and to be dripped into the hydrodynamic bearing received in the vacuum vessel.

Abstract: An object is to reduce manufacturing cost of a housing, and enable to disuse an adhesive in fixation portions between a housing and a bearing sleeve and the like. A housing 7 is made of resin material, which comprises a liquid crystal polymer (LCP) as crystalline resin blended with carbon nanotubes in a blending ratio of 2 to 35 vol % as a conductive filler, by injection molding. A bearing sleeve 8, which is inserted into the inner peripheral surface 7c of the housing 7, is secured to the housing 7 by ultrasonic welding.

Abstract: An integrated thermodynamic system for enhancing the energy efficiency and operating lifetime by reducing wear of moving parts is provided. The system provides automated means to attract or repel electrically conductive or magnetic lubricants in a dynamic manner. The system, when utilizing advanced lubricants including ionic liquids, poly(ionic) liquids, electrorheological fluids, or expanded fluid; and a control system implementing dynamic algorithms, preferably meets the complex demands of thermodynamic systems, particularly high speed rotating equipment, for obtaining high efficiency that requires low friction and long lifetimes that requires superior wear resistance.

Abstract: Multifunctional components enable the construction of economical motor assemblies. A first embodiment of the present invention provides a hub, cup, spindle, and base assembly for a motor assembly having at least one journal bearing, at least one thrust bearing, and at least one fluid seal. A second embodiment of the present invention provides a hub, spindle, and base with integrated cup assembly for a disc drive bearing having at least one journal bearing, at least one thrust bearing, and at least one fluid seal. In a third embodiment, a hub is rotatably assembled with a spindle coupled to a thrust bearing, prior to assembly with a base. In further embodiments, motor assemblies comprise the above embodiments combined with stator and rotor assemblies.

Abstract: 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 members of the bearing are place in a second environment under a pressure lower than atmospheric pressure and higher than the pressure in the first environment. The degassed oil is supplied to the gap between bearing surfaces of the first and second members while the first and second members are in the second environment under pressure lower than atmospheric pressure and higher than the pressure in the first environment. Subsequently the pressure in the second environment is increased to force the oil into the gap between the bearing surfaces of the first and second members of the hydrodynamic fluid.

Abstract: A housing for fluid lubrication bearing apparatuses having improved adhesiveness with other components is provided at low costs. A housing 7 constituting a fluid lubrication bearing apparatus 1 was formed of a resin composition comprising polyphenylene sulfide (PPS) as a base resin, and the ratio of the base resin added to the resin composition was set to not lower than 40 vol % but not higher than 70 vol %. Moreover, a composition prepared by adding an epoxy compound having two or more epoxy groups per molecule of the compound and epoxy value of 0.5 meq/g or more to the resin composition so that the amount of epoxy groups in the resin composition is 8 meq/100 g or more was used. A carbon fiber was added to the resin composition comprising the base resin in an amount of not less than 10 vol % but not more than 35 vol %.

Abstract: An electric fan includes a fan base (10), a bearing (40) and a rotor assembly (20). The fan base forms a central tube (11) receiving the bearing therein. The rotor assembly includes a fan hub (22), and a pivot axle (23) joined to the fan hub. The pivot axle pivotably extends into the bearing. A sealing lid (60) is screwedly mounted on a bottom opening of the central tube to prevent lubricant oil contained in the central tube from leaking. The sealing lid abuts against a bottom of the bearing to prevent the bearing from deflection.