Abstract: A shaft for a cabin air compressor includes a first attachment portion, a second attachment portion, an intermediate portion, a retention flange, and a tie rod support pocket. The first attachment portion is disposed at a first end of the shaft. The second attachment portion is disposed at a second end of the shaft opposite the first end. The intermediate portion extends from the first attachment portion to the second attachment portion and an interior wall of the intermediate portion defines an inner shaft space. The retention flange extends a first distance into the inner shaft space from the interior wall of the intermediate portion and is offset from the first attachment portion by a second distance. The tie rod support pocket is defined by the interior wall, extends between the flange and the first attachment portion, and is configured to receive a tie rod support.

Abstract: A lubricant supported electric motor includes a stator presenting an outer raceway and a rotor extending along an axis and rotatably disposed within the stator. The rotor presents an inner raceway disposed in spaced relationship with said outer raceway to define at least one hydrostatic support chamber disposed therebetween. A lubricant is disposed in the hydrostatic support chamber for supporting the rotor within the stator. A monitoring port is disposed in fluid communication with the at least one hydrostatic support chamber, and a sensor is coupled with the monitoring port for monitoring an operating characteristic of the lubricant disposed in said at least one hydrostatic support chamber. This monitored operating characteristic is then used to determine a real-time operating condition of the lubricant supported electric motor.

Abstract: A resin sliding bearing includes: a bearing surface for slidingly bearing a shaft; and a hollow that communicates with the bearing surface through to a different surface of the bearing.

Abstract: A countershaft as disclosed herein may include one or more bearing zones along its axial length. Each bearing zone may include one or more radial holes in fluid communication with one or more grooves, respectively, and one or more axial channels formed along the longitudinal length of the countershaft. Each groove may be positioned adjacent an interface between a rotating member and a non-rotating member and include one or more features therein, such as a profile and/or taper.

Abstract: This disclosure describes various implementations of a downhole-blower system that can be used to boost production in a wellbore. The downhole-blower system includes a blower and an electric machine coupled to the blower that can be deployed in a wellbore, and that can, in cooperation, increase production through the wellbore.

Abstract: A mechanical assembly includes two mechanical parts rotatable relative to each other. A first part is provided with a cylindrical cavity, a second part (34) has at least one cylindrical portion engaged in the cylindrical cavity of the first part, and a gap separates the cylindrical portion and the wall of the cylindrical cavity so as to allow relative movement in rotation between the first part and the second part (34). A lubricant distribution network (37, 38) is configured for feeding the gap with a fluid lubricant so as to form a fluid bearing. A first surface (34s) selected from the inside surface of the cylindrical cavity of the first part and the outside surface of the cylindrical portion of the second part is provided with at least two lubricant admission orifices.

Abstract: An apparatus includes a stationary sleeve and a shaft operable to rotate with respect to the stationary sleeve. A hub rotates with respect to the stationary sleeve in response to the shaft rotating. A mechanically adjustable gap forming component is attached to the stationary sleeve and radially extends between the hub and a base. The mechanically adjustable gap forming component forms a radially extending gap above the mechanically adjustable gap forming component. The mechanically adjustable gap forming component is mechanically adjustable in an axial direction with respect to the stationary sleeve. The hub dynamically adjusts the radially extending gap above the mechanically adjustable gap forming component during rotation of the hub.

Abstract: A fluid bearing motor. The fluid bearing motor includes a stationary sleeve, a backiron, a hub coupled to the backiron, and a gap forming component. The hub is operable to rotate with respect to the stationary sleeve. The gap forming component is attached to the stationary sleeve and forms a gap between the stationary sleeve and the backiron. The size of the gap dynamically changes in response to changes in temperature.

Abstract: An appliance containing a motorized appliance pump is provided. The appliance pump includes an integrated motor. The pump is an axial flow pump operable to move fluid along a fluid passageway.

Abstract: The invention relates to a radial bearing, comprising a housing, a housing bore extending along a bearing axis, several tilting segments that are arranged around the bearing axis in order to support a shaft and each have a radially outer bearing surface, by means of which the tilting segments are supported on a supporting surface on the housing. The radially outer bearing surface of each tilting segment and the supporting surface are arranged facing each other. Each tilting segment is movably arranged relative to the housing.

Abstract: A centrifugal blood pump device includes a housing, a centrifugal pump section having an impeller which rotates in the housing to send blood by centrifugal force upon rotation, an impeller rotation torque generation section for attracting a magnetic member of the impeller and rotating the impeller, and a plurality of grooves for hydrodynamic bearing provided on an inner face of the housing on the impeller rotation torque generation section side. A side wall of each of the grooves for hydrodynamic bearing is formed as an inclined side wall inclined obliquely such that the groove for hydrodynamic bearing is expanded from a bottom face of the groove for hydrodynamic bearing toward an opening face of the groove for hydrodynamic bearing.

Abstract: A piston engine may include a clearance gap between a piston assembly and a cylinder. The piston may be configured to translate in a bore of the cylinder. The clearance gap between the piston assembly and the bore may be actively or passively controlled. A control system may provide one or more adjustments based on, for example, a detected temperature, pressure, flow rate, work metric, and/or other indicator. The adjustments may include, for example, adjusting a cylinder liner, adjusting a flow through a bearing element, adjusting a coolant flow, adjusting a heat pipe property, and/or other adjustments. One or more auxiliary systems may be used to provide the adjustments.

Abstract: There is provided a spindle motor including: a lower thrust member fixedly installed on a base member and including an extension part extended upwardly in an axial direction; a shaft having a lower end portion fixedly installed on the lower thrust member; a sleeve rotatably installed with respect to the shaft; an upper thrust member fixedly installed on the shaft to correspond to an upper portion of the sleeve; and a rotor hub rotating together with the sleeve, wherein an end portion of the extension part and a surface of the sleeve opposed thereto are provided with rounded surfaces.

Abstract: A rotating hub and fixed spindle assembly with first and second fluid dynamic journal bearings and first and second fluid dynamic thrust bearings for a disc drive memory system has a pump seal and a radial ring seal at a first axial terminus for lubricant containment, and a capillary seal and a labyrinth seal at a second axial terminus for lubricant containment and storage. Lubricant fluid pressure differences between first and second seals are minimized through one or more lubricant fluid communicating channels in the hub assembly, in order to minimize lubricant fluid loss through a seal. Lubricant fluid can also be purged of any air bubbles by lubricant fluid circulation through the channel.

Abstract: There is provided a spindle motor including: a base part including a base member and a lower thrust member fixedly installed on the base member; a shaft having a lower end portion fixedly installed on the base part; an upper thrust member fixedly installed on an upper end portion of the shaft; a sleeve disposed between the upper and lower thrust members and rotatably installed on the shaft; and a rotor hub fixedly installed on the sleeve to thereby rotate together therewith, wherein the sleeve includes a connection hole formed therein in order to connect an inner diameter portion thereof to an outer peripheral surface thereof.

Abstract: A circumferential seal assembly capable of separating a gas into two separate flow paths before communication onto a pair of seal rings is presented. The seal assembly includes an annular seal housing, a pair of annular seal rings, a rotatable runner, and a plurality of groove structures. The seal housing is interposed between a pair of low pressure compartments. The seal rings are separately disposed within the seal housing and separately disposed around the rotatable runner. The groove structures are disposed along an outer circumferential surface of the rotatable runner. The gas is communicable onto the groove structures. Each groove structure bifurcates the gas before communication onto the seal rings. Flow within each groove structure may be further separable before the gas is communicated onto the seal rings. The gas forms a thin-film layer between the rotatable runner and each seal ring.

Abstract: Provided herein is an apparatus, including a fluid dynamic bearing, wherein the fluid dynamic bearing includes a set of pressure-generating grooves, and wherein the set of pressure-generating grooves includes a plurality of chevron-shaped grooves, each chevron-shaped groove including at least two selected from a non-uniform depth, non-uniform angle, a non-uniform width, or a non-uniform length, selected to provide a predetermined spindle-motor stiffness to the journal bearing during steady-state operation and during a shock event.

Abstract: A spindle motor includes a shaft arranged to extend in an axial direction, and a base portion arranged to define a portion of a housing, and including a through hole in which the shaft is inserted. A fixing region is defined between an inner circumferential portion of the base portion and a lower portion of the shaft. The fixing region includes a press-fitting region and an adhesion region defined on a lower side of the press-fitting region and in which a seal gap is defined between the inner circumferential portion of the base portion and the lower portion of the shaft. The seal gap is arranged to gradually decrease in radial width with increasing height. The seal gap is arranged to include an adhesive arranged therein over an entire circumference thereof.

Abstract: A countershaft as disclosed herein may include one or more bearing zones along its axial length. Each bearing zone may include one or more radial holes in fluid communication with one or more grooves, respectively, and one or more axial channels formed along the longitudinal length of the countershaft. Each groove may be positioned adjacent an interface between a rotating member and a non-rotating member and include one or more features therein, such as a profile and/or taper.

Abstract: An air bearing shaft has a first cylindrical portion with a relatively small outer diameter, and a ramped surface extending at an angle that is non-perpendicular and non-parallel to a central axis of a shaft body. The ramped surface leads into a second cylindrical portion of the shaft has a large outer diameter that is greater than the diameter of the first cylindrical portion. There are twelve air holes formed to extend into an interior of the second cylindrical portion. A bore diameter is defined to an inner periphery of the second cylindrical portion at the location of the air holes. A ratio of the bore diameter to a diameter of the air holes is between 6.30 and 6.54. In addition, a bearing assembly, a compressor, and a method of incorporating an air bearing shaft into a compressor are all disclosed and claimed.

Abstract: There is provided a spindle motor including: a lower thrust member fixedly attached to a base member; a shaft fixedly attached to at least one of the lower thrust member and the base member; a sleeve disposed on an upper portion of the lower thrust member and rotatably installed on the shaft; a rotor hub coupled to the sleeve to thereby rotate together therewith; and an upper thrust member fixedly attached to an upper end portion of the shaft and forming a liquid-vapor interface together therewith, wherein the sleeve has an inclination part formed at an upper end portion thereof so as to form the liquid-vapor interface together with the upper thrust member, the inclination part having an outer diameter larger in an upper portion thereof than in a lower portion thereof.

Abstract: There is provided a fluid dynamic bearing assembly including: a sleeve having a shaft insertedly mounted therein; and upper and lower radial bearing parts formed on at least one of an outer circumferential surface of the shaft and an inner circumferential surface of the sleeve, wherein a clearance between the lower radial bearing part and a surface disposed to face the lower radial bearing part is wider than a clearance between the upper radial bearing part and a surface disposed to face the upper radial bearing part.

Abstract: There is provided a hydrodynamic bearing apparatus, including: a shaft; and a sleeve rotatably supporting the shaft, wherein at least one of an outer surface of the shaft and an inner surface of the sleeve includes upper and lower hydrodynamic grooves generating hydrodynamic fluid pressure while the shaft rotates, and at least one of the upper and lower hydrodynamic grooves has a depth of a lower part thereof greater than that of an upper part thereof.

Abstract: The spindle motor includes a rotating shaft and a sleeve. The rotating shaft has a stepped portion in a fluid dynamic pressure shafting system. The sleeve is fitted over the circumferential outer surface of the rotating shaft. A sleeve recess is formed in the inner surface of the sleeve so that the edges of the stepped portion are spaced apart from the sleeve.

Abstract: In a gas dynamic pressure bearing mechanism (1) for smoothing rotary motion of a shaft (10) by feeding gas to the bearing clearance between the shaft (10) and a fixed sleeve (20) for supporting the shaft (10) through a herring bone groove (10a), the herring bone groove (10a) is provided in the shaft (10) such that pressure distribution generated in the bearing clearance moves at a high speed. The herring bone groove (10a) consists of N grooves such that N minimal pressure values appearing alternately with maximal pressure values at the positions where the maximal pressure values of dynamic pressure variation appear in the bearing clearance when the shaft (10) rotates have such an interval as it becomes lower than the condensation pressure value.

Abstract: The hydrodynamic bearing assembly includes: a sintered sleeve having a shaft hole formed therein such that a shaft is rotatably inserted thereinto and including at least one dynamic pressure bearing part to generate dynamic pressure in a lubricating fluid filled in a bearing clearance at the time of rotation of the shaft; and a housing provided to enclose an outer peripheral surface of the sintered sleeve, wherein a bottom surface of a dynamic pressure groove of the at least one dynamic pressure bearing part has a porosity higher than that of a protrusion surface thereof.

Abstract: There are provided a hydrodynamic bearing assembly and a spindle motor including the same. The hydrodynamic bearing assembly includes: a shaft; a sleeve including a shaft hole so that the shaft is rotatably inserted thereinto; and first and second dynamic pressure generation grooves formed in upper and lower portions of at least one of an outer diameter of the shaft and an inner diameter of the sleeve in an axial direction thereof so as to generate dynamic pressure in a lubricating fluid filling a bearing clearance formed between the shaft and the sleeve at the time of rotation of the shaft, wherein the bearing clearance between the shaft and the sleeve is narrowed downwardly in the axial direction.

Abstract: There is provided a hydrodynamic bearing assembly structure capable of significantly reducing an increase in current while increasing bearing strength. The hydrodynamic bearing assembly includes: a rotating member including a shaft; a sleeve including a shaft hole so that the shaft is rotatably inserted thereinto; and a plurality of dynamic pressure generation grooves formed in at least one of an outer circumferential surface of the shaft and an inner circumferential surface of the sleeve and formed in upper and lower portions of the shaft or the sleeve in an axial direction so as to generate dynamic pressure in lubricating fluid filled in a bearing clearance formed between the shaft and the sleeve at the time of rotation of the shaft, wherein any one or more of the plurality of dynamic pressure generation grooves has a depth deeper than that of the other dynamic pressure generation groove.

Abstract: A shaft member for a fluid dynamic bearing device that has a recess to cause a dynamic pressure effect of a fluid in a bearing clearance, which is formed on it by rolling, and where a surface layer portion of the recess and a surface layer portion of a surrounding region of the recess has a nitride layer, and where nitrogen is diffused and penetrated in a material of the shaft member that is formed by nitriding after the rolling.

Abstract: There is provided a spindle motor including: a lower thrust member fixedly attached to a base member; a shaft fixedly attached to at least one of the lower thrust member and the base member; a sleeve disposed on an upper portion of the lower thrust member and rotatably installed on the shaft; a rotor hub coupled to the sleeve to thereby rotate together therewith; and an upper thrust member fixedly attached to an upper end portion of the shaft and forming a liquid-vapor interface together therewith, wherein the sleeve has an inclination part formed at an upper end portion thereof so as to form the liquid-vapor interface together with the upper thrust member, the inclination part having an outer diameter larger in an upper portion thereof than in a lower portion thereof.

Abstract: In a bearing apparatus, a first cup portion defining a portion of a stationary portion of a bearing apparatus includes a circular plate portion and a cylindrical portion projecting downward from an outer edge portion of the circular plate portion. A rotating portion of the bearing apparatus includes an annular recessed portion arranged to accommodate at least a lower end portion of the cylindrical portion. Accordingly, it is possible to limit the axial dimension of the bearing apparatus while also enabling a radial dynamic pressure groove array. Additionally, one end of a through hole defined in the rotating portion is arranged to open into the annular recessed portion.

Abstract: There are provided a hydrodynamic bearing assembly and a motor having the same, the hydrodynamic bearing assembly including a shaft rotating together with a rotor case; and a sleeve rotatably supporting the shaft, wherein at least one of the shaft and the sleeve has first and second dynamic pressure grooves formed therein, the first dynamic pressure groove being disposed in an upper portion of at least one of the shaft and the sleeve in an axial direction and having a herringbone shape and the second dynamic pressure groove being disposed in a lower portion of at least one of the shaft and the sleeve in the axial direction so as to be spaced apart from the first dynamic pressure groove and having a spiral shape.

Abstract: A rotating device includes a fixed body having a base and a shaft, a hub, and a rotating body having a rotating-body-side encircling member fixed to the hub and encircling the shaft. A lubricant is present between the fixed body and the rotating body. The rotating-body-side encircling member and the shaft are each formed with a radial dynamic pressure generating groove. The fixed body includes a base-side encircling member having a disk part encircling the base-side portion of the shaft and a cylinder part encircling the rotating-body-side encircling member. The base-side encircling member has the disk part fixed to the shaft by interference fitting, and has the cylinder part fixed to the base. An air-liquid interface is located in a gap in the radial direction between the inner periphery of the cylinder part and the outer periphery of the rotating-body-side encircling member.

Abstract: An air bearing with a rotor and a static land forming a clearance gap, the rotor including a compressible fluid supply channel to supply fluid to the bearing, and the rotor including a bearing inner race rotatably secured to the rotor, the inner race having an outer surface with a plurality of pockets opening outward and connected to a high pressure reservoir on the inner surface of the inner race through a plurality of radial extending supply channels that function as centrifugal pumps when the inner race is rotating to increase the bearing fluid pressure within the air bearing and increase the bearing stiffness. The inner race pockets extend around the full annular surface.

Abstract: A device is provided having a support structure and a rotating shaft having a center axis which rotating shaft and support structure are pivotable supported against each other by at least one hydrodynamic rotary bearing including a first bearing part and a second bearing part pivotable relatively to each other, a lubricant and a contact zone between the first bearing part and the second bearing part at least when the hydrodynamic rotary bearing is at rest, wherein the rotating shaft and the support structure are shaped in such a way and the hydrodynamic rotary bearing is in such a way arranged on the rotating shaft and the support structure that the contact zone of the hydrodynamic rotary bearing is submerged in the lubricant even when the hydrodynamic rotary bearing is at rest.

Abstract: An air bearing shaft has a first cylindrical portion with a relatively small outer diameter, and a ramped surface extending at an angle that is non-perpendicular and non-parallel to a central axis of a shaft body. The ramped surface leads into a second cylindrical portion of the shaft has a large outer diameter that is greater than the diameter of the first cylindrical portion. There are twelve air holes formed to extend into an interior of the second cylindrical portion. A bore diameter is defined to an inner periphery of the second cylindrical portion at the location of the air holes. A ratio of the bore diameter to a diameter of the air holes is between 6.30 and 6.54. In addition, a bearing assembly, a compressor, and a method of incorporating an air bearing shaft into a compressor are all disclosed and claimed.

Abstract: There is provided a fluid dynamic bearing assembly including: a sleeve having a shaft insertedly mounted therein; and upper and lower radial bearing parts formed on at least one of an outer circumferential surface of the shaft and an inner circumferential surface of the sleeve, wherein a clearance between the lower radial bearing part and a surface disposed to face the lower radial bearing part is wider than a clearance between the upper radial bearing part and a surface disposed to face the upper radial bearing part.

Abstract: Provided is a shaft member for a fluid dynamic bearing device, which is excellent in wear resistance and which can exert a high dynamic pressure effect. A shaft material (11) is rolled to form a recess (7) for causing a dynamic pressure effect of a lubricating oil in a radial bearing clearance (6). In this case, in a surface layer portion (14) of the recess (7) to be formed in an outer peripheral surface (11a) of the shaft material (11), a first hardened layer (14a) is formed by rolling. At the same time, also in a surface layer portion (15) of a surrounding region (8) of the recess (7), a first hardened layer (15a) is formed by rolling at a partial region thereof. After the recess (7) is formed by the rolling, barreling is applied to the shaft material (11). As a result, an outermost surface layer portion of the surface layer portion (15) is formed with a second hardened layer (15b) by the barreling.

Abstract: A dynamic bearing manufacturing includes steps of: providing a bearing and a processing tool, the bearing having an axial hole, and the processing tool having at least one protruding pattern formed on an exterior wall of the processing tool; positioning the processing tool into the axial hole of the bearing; pressing the processing tool to contact with an inner wall of the bearing so as to transfer and print the protruding pattern of the processing tool onto the inner wall of the bearing; rotating the processing tool at a first rotation speed and driving the bearing to rotate at a second rotation speed; and forming at least one concave pattern on the inner wall of the bearing, and the at least one concave pattern being corresponding to the protruding pattern of the processing tool.

Abstract: The present invention discloses a self-lubricating bearing, which is a hollow cylindrical body with an axial hole in its center, exhibiting a structure formed by sintering a multiple of spherical alloys particles under microscopy. The self-lubricating bearing has a multiple of pores to receive lubricating oil. Further, the present invention provides a manufacturing process for making self-lubricating bearings.

Abstract: Proposed is a fluid dynamic bearing system having a bearing bush, a shaft rotatably supported in a bearing bore of the bearing bush and a hub connected to the shaft. A bearing gap filled with bearing fluid and having an axial section is defined between the shaft, the bearing bush and the hub. A first and a second fluid dynamic radial bearing are disposed along the axial section of the bearing gap, the radial bearings being marked by grooved bearing patterns on the associated bearing surfaces of the shaft and/or of the bearing bush. The two radial bearings have a mutual distance dL measured from an apex line of the first radial bearing to an apex line of the second radial bearing. A separator groove is disposed in the bearing bush or in the shaft in the axial section of the bearing gap between the two radial bearings and has an axial length lS. According to the invention, the ratio between the distance dL and the length lS is greater than 5 (five).

Abstract: A hydrodynamic bearing rotary device which can reduce rotation friction, and recording and reproducing apparatus including the same is provided. In the hydrodynamic bearing rotary device, such as hard disc devices, a rotary shaft having a hub on one end is provided in a bearing of a sleeve so as to be rotatable. Thrust hydrodynamic grooves are provided on the other end surface of the rotary shaft, to form a thrust bearing with the thrust plate. A communication path is provided in the sleeve. The second gap between the hub and the sleeve end surface is used as a flow channel and is connected to the communication path. In this way, the rotation friction torque of the thrust bearing can be made sufficiently small, and internal pressure in bonded portions of the rotary shaft or the bottom plate can be suppressed. Thus, the oil can be prevented from oozing out from a small space of the bonded surfaces. Furthermore, the hydrodynamic bearing can be made thin.

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, 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: In a gas dynamic pressure bearing mechanism (1) for smoothing rotary motion of a shaft (10) by feeding gas to the bearing clearance between the shaft (10) and a fixed sleeve (20) for supporting the shaft (10) through a herring bone groove (10a), the herring bone groove (10a) is provided in the shaft (10) such that pressure distribution generated in the bearing clearance moves at a high speed. The herring bone groove (10a) consists of N grooves such that N minimal pressure values appearing alternately with maximal pressure values at the positions where the maximal pressure values of dynamic pressure variation appear in the bearing clearance when the shaft (10) rotates have such an interval as it becomes lower than the condensation pressure value.

Abstract: Disclosed herein is a rotating shaft for an ultra slim spindle motor which reduces a frictional area between the rotating shaft and a bearing, thus being capable of reducing consumption current consumed during the rotation of the rotating shaft. The ultra slim spindle motor includes a rotating shaft for axially supporting a rotor casing and a bearing for rotatably supporting the rotating shaft. The rotating shaft includes a coupling part which is press-fitted into the rotor casing, upper and lower contact parts which are supported, respectively, by an upper portion and a lower portion of the bearing, and a non-contact part which is provided between the upper and lower contact parts in such a way that the non-contact part is not in contact with the bearing.

Abstract: A fluid dynamic bearing system having pressure-generating asymmetric surface patterns, having at least two bearing parts that are rotatable with respect to each other and form a bearing gap filled with a bearing fluid between associated bearing surfaces. The surface patterns are disposed on at least one bearing surface so that hydrodynamic pressure is generated within the bearing gap when the bearing parts rotate with respect to each other. Each surface pattern comprises at least three sections, each section generating a pumping action in a defined direction, and the pumping actions of adjacent sections being substantially aligned in opposite directions. Due to the special geometry of the surface patterns, tolerances in the geometry of the bearing gap have a less significant effect on the pre-defined pumping direction.

Abstract: An inertial navigation system is provided. The system includes a sensor block, an outer shell that substantially surrounds the sensor block and a plurality of gas pads connected to the outer shell that float the sensor block in gas creating a near frictionless environment to allow the sensor block to rotate in all directions. Each of the plurality of gas pads is adapted to receive pressurized gas. The outer shell and the sensor block are separated by a gap created by the pressurized gas at each pad.

Abstract: A hydrodynamic bearing device including a sleeve (1), a shaft (2), and oil (100). With respect to the sleeve (1), a stepped portion (1b) provided at one end and an inner peripheral face (1e) extending linearly in the axial direction and continuously with the stepped portion (1b) are formed by a working method that involves the use of a metal mold. The shaft (2) is inserted so as to be capable of relative rotation with respect to the inner peripheral face (1e) of the sleeve (1). The oil fills the space formed between the inner peripheral face of the sleeve and the outer peripheral face of the shaft. Dynamic pressure generation grooves (9a and 9b), which open in the axial direction at at least one end in the axial direction of the inner peripheral face (1e) and are continuous in the axial direction from one end, are formed in the inner peripheral face.

Abstract: A vibration absorbing bearing supports an armature shaft and a blower motor for vehicles. The vibration absorbing bearing may include a longitudinal groove which is formed on the inner circumference of the bearing in such a way as to extend in a longitudinal direction and hold a lubricant therein. The blower motor for vehicles may include a main body, a stator installed in the main body, an armature assembly installed in the main body and having an armature shaft, and the vibration absorbing bearing. Such a construction improves the durability of components and achieves the joining of the components and the absorption of vibration, thus efficiently isolating cogging noise.