Abstract: Systems and methods are provided for a compound bearing assembly including an offset coupler supporting an inner bearing and an outer bearing for distributing a rotational loading of the compound bearing assembly. In some embodiments, at least one of the bearings comprises a bearing cage with a plurality of elongated openings for receiving a respective plurality of balls. The compound bearing assembly is configured to support a drive shaft of a supercharger system of a vehicle or some other rotational system.

Abstract: An aircraft rotor system includes a rotating pitch change shaft which rotates about an axis, a translating element disposed within the rotating pitch change shaft and movable along the axis and a pitch change bearing assembly which transfers movement of the translating element to the pitch change shaft. The pitch change bearing assembly includes a primary bearing and a secondary bearing coupled to the rotating pitch change shaft via the translating element when the primary bearing is in a first mode. A thrust shoulder is coupled to the translating element. The thrust shoulder is movable into engagement with the secondary bearing in response to failure of the primary bearing such that in a second mode, movement of the translating element is primarily transferred to the pitch change shaft via the secondary bearing.

Abstract: The invention relates to a tool spindle for a device for fine machining optically active surfaces on workpieces, having a spindle housing and a tool holding portion which protrudes beyond the housing. The tool holding portion can be axially advanced towards the workpiece along a tool rotational axis via a guiding assembly, which can be rotated about the tool rotational axis in the spindle housing. In order to axially advance the tool holding portion, the guide assembly has a plurality of linear mounting elements, which are distributed about the tool rotational axis in a uniform manner, and respective paired guide rods, which are connected to the tool holding portion in a traction- and pressure-resistant manner.

Abstract: A rolling-element bearing transmission includes a first rolled-on element, at least one second rolled-on element and a third rolled-on element. Each of the rolled-on elements has a raceway configured to support a plurality of rolling elements. A first set of rolling elements is disposed between the first rolled-on element and the at least one second rolled-on element and a second set of rolling elements is disposed between the at least one second and the third rolled-on elements. Each of the rolled-on elements comprises or supports at least one transmission element, and the at least one transmission elements are disposed and configured to form a transmission.

Abstract: A bearing of which a load supporting position capable of being changed, including: a cylindrical housing comprising a hollow inner circumferential surface; one or more support members provided in the housing and disposed along a circumferential direction of the inner circumferential surface; a plurality of pin holes provided along an outer circumferential surface of the housing; and a rotation preventing pin coupled to a first pin hole of the plurality of pin holes and configured to prevent rotation of the housing. In addition, threads are formed on inner circumferential surfaces of the pin holes and an outer circumferential surface of the rotation preventing pin to enable a pin hole and the rotation preventing pin to be easily coupled and decoupled.

Abstract: A rolling bearing including an inner ring, an outer ring and a middle ring, the rings being concentrically arranged around a central axis so that the middle ring is arranged radially between the inner ring and the outer ring, at least one row of rolling elements interposed between the inner ring and the middle ring, at least one row of rolling elements interposed between the middle ring and the outer ring. The inner ring provides a radially inner circumferential portion with a gear toothing and the outer ring having a radially outer circumferential portion with a gear toothing.

Abstract: A device includes a bearing-in-bearing with an inner ring, an intermediate ring and an outer ring. Between the inner ring and the intermediate ring and between the intermediate ring and the outer ring, inner roller elements, and outer roller elements, are attached, respectively. The bearing-in-bearing is attached between two components that can rotate in relation to each other, a shaft and a housing, of which one component is or can be connected to a drive. A transmission is provided between the intermediate ring and the driven component in order to drive the intermediate ring. The transmission is a contactless transmission.

Abstract: A rack system has: a first anchor to connect to a first side wall of a bed of a vehicle below a top of the first side wall and above a floor of the bed; a second anchor to connect to a second side wall of the bed below a top of the second side wall and above the floor; a first angle adjuster rotatably connected to the first anchor and having a first locking mechanism to lock at a first angle and a second angle; a second angle adjuster rotatably connected to the second anchor and having a second locking mechanism to lock at the first angle and the second angle; a first support member connected to the first angle adjuster; a second support member connected to the second angle adjuster; and a cross-member connected between the first support member and the second support member.

Abstract: A vehicle liftgate assembly according to an exemplary aspect of the present disclosure includes, among other things, a vehicle body, a liftgate bracket, a liftgate rotatably mounted to the vehicle body by way of the liftgate bracket, and a strut connected to the liftgate bracket to regulate rotational movement of the liftgate bracket. This disclosure also relates to a method and a rotation assembly, which may include a liftgate bracket and a flipglass bracket.

Abstract: An aircraft tail rotor system includes a rotating pitch change shaft, a translating element, and a pitch change bearing assembly including a first bearing and a second bearing. The pitch change bearing assembly is operable to transmit movement of the translating element to the rotating pitch change shaft via the first bearing or the second bearing. A failure section is formed at an interface between the first bearing and the translating element. When the failure section decouples the first bearing from the translating element such that the first bearing does not transmit movement of the translating element to the rotating pitch change shaft, the second bearing transmits movement of the translating element to the rotating pitch change shaft.

Abstract: A vehicle liftgate assembly according to an exemplary aspect of the present disclosure includes, among other things, a vehicle body, a liftgate bracket, a liftgate rotatably mounted to the vehicle body by way of the liftgate bracket, and a strut connected to the liftgate bracket to regulate rotational movement of the liftgate bracket. This disclosure also relates to a method and a rotation assembly, which may include a liftgate bracket and a flipglass bracket.

Abstract: The present invention relates to a bearing arrangement having a first and a second support structure for supporting a rotating member, a first rolling bearing supporting the first support structure in relation to the second support structure at a first support location, a second rolling bearing supporting the first support structure in relation to the second support structure at a second support location. The first and second rolling bearings are arranged in a coaxial configuration in relation to each other. Furthermore, the first rolling bearing forms a radially outer bearing, and the second rolling bearing is arranged radially inside the first rolling bearing by a bearing radial distance, and the first support location and second support location are axially aligned. The present invention also relates to a method for manufacturing a bearing arrangement.

Abstract: A bearing (8) comprising a first row of rolling elements (10, 10a, 10b, 12, 12a, 12b) having a first pressure center (14) and a first contact angle, and a second row of rolling elements (10, 10a, 10b, 12, 12a, 12b) having a second pressure center (14) and a second contact angle, whereby said first pressure center (14) is arranged to coincide with said second pressure center (14) and whereby said first contact angle is the same as said second contact angle.

Abstract: A rolling bearing assembly including an intermediate bearing ring is provided. The rolling bearing assembly includes an inner bearing ring including at least one axial end configured to be supported on a first component, and an outer bearing ring including at least one axial end configured to be supported on a second component. The intermediate bearing ring is arranged between the inner bearing ring and the outer bearing ring and includes at least one axial end configured to be supported on a third component. The at least one axial end of the intermediate bearing ring extends in an axial direction past at least one of the at least one axial end of the inner bearing ring or the at least one axial end of the outer bearing ring.

Abstract: Exemplary embodiments disclosed herein include bearings with three races: an inner race, a shared race, and an outer race that exhibit increased life under oscillatory loads. The exemplary embodiments may include one or more directional biasing mechanisms configured such that when a bearing shaft rotates in one direction, the shared race rotates with it, and when the shaft oscillates in the other direction, the shared race is impeded from moving in the other direction. Under continued oscillation, the shared race will “walk” in circles around the shaft, effectively distributing the load and wear over the entire circumference of a bearing surface.

Abstract: An incremented force bearing has a bearing substrate formed of multiple rings made up of an inner ring, an outer ring, an intermediate ring interposed between the inner and outer rings, rotators interposed between respective rings for causing the respective rings to rotate with one another, levers arranged in a row around a center of the upper surface of the bearing substrate, and an annular recess provided around the center of the bearing substrate and recessed in respective rings, the annular recess having wavy slide surfaces as recessed surfaces by which levers are pressed to the inner and outer rings.

Abstract: A bearing has a circular element (12) normally fixed with respect to ground (111). The circular element (12) associated with the ground element is permitted to idle in rotation, so as to distribute wear around the circumference thereof. Various means of controlling and causing idle rotation are disclosed. Rolling elements (113) are preferably provided between inner and outer races (112, 115) of a bearing assembly.

Abstract: The invention relates to a rolling bearing arrangement (5) for mounting parts of a wind power plant (1), comprising three relatively rotatable annular elements (6-8) arranged concentrically with one another and at least regionally inside one another for connection to relatively rotatable parts of the wind power plant, wherein two relatively rotatable connecting elements (6-9) are separated from each other by a gap (9, 10) and partially or wholly overlap each other in the radial direction, wherein, further, provided in the region of a gap in radially overlapping regions of the annular connecting elements are at least two rows of rolling elements (34, 35), each of which rolls along a respective two raceways (32, 33) that overlap each other at least regionally in the radial direction, as well as at least one additional row of rolling elements (42) whose raceways do not overlap in the radial direction, wherein the radially innermost connecting element and the radially outermost connecting element are connected to

Abstract: A gear-train for transferring torque from multiple power sources includes first, second, and third input members, and an output member. The first and second input members rotate about a first axis, the third input member rotates about a second axis, and the output member rotates about a third axis. The gear-train additionally includes a first gear-set connected to the first input member. The gear-train also includes a second gear-set connected to the second input member. The gear-train additionally includes an intermediate shaft that rotates about a fourth axis. Furthermore, the gear-train includes a third gear-set connected to the intermediate shaft. In the third gear-set, first member is connected to the intermediate shaft and to the third input member, second and third members are set coaxially relative to the intermediate shaft and configured for asynchronous rotation with each other, and the third member is also connected to the output member.

Abstract: In a bearing unit of a cable sheave of a cableway system, the cable sheave is arranged on a shaft which is mounted in bearings in a bearing framework. An inner ring or an outer ring of at least a first bearing is connected to the shaft. The outer ring or the inner ring of the first bearing is connected to an inner ring or an outer ring of a second bearing and is mounted in the bearing framework via the second bearing.

Abstract: A duplex bearing is configured for use with a nuclear reactor control rod drive mechanism. The duplex includes an outer member and an inner member wherein each defines an interior surface and an exterior surface. The outer member interior surface defines a first and second outer raceway; and the inner member defines a first and second inner raceway. A first plurality of load-carrying rolling elements and a first plurality of spacer rolling elements are disposed in a first annular cavity defined between the first inner raceway and first outer raceway. A second plurality of load-carrying rolling elements and a second plurality of spacer rolling elements are disposed in a second annular cavity defined between the second inner raceway and the second outer raceway. The duplex bearing is configured to operate with sealed de-ionized water exhibiting a temperature in the range of up to about 1200° F. as a sole lubricant.

Abstract: A rolling bearing that has at least one first row of rolling elements and one second row of rolling elements as well as a common bearing ring for both rows.

Abstract: An inner race of a first rolling bearing is fixed to a shaft, and an outer race thereof is fixed to an inner race of a second rolling bearing. In the first bearing, the outer race and rolling elements contact each other on the side of a center of the rolling elements closer to one end side in an axial direction, and the inner race and the rolling elements contact each other on the side of the center of the rolling elements closer to the other end side in the axial direction. In the second bearing, an outer race and rolling elements contact each other on the side of a center of the rolling elements closer to the one end side, and the inner race and the rolling elements contact each other on the side of the center of the rolling elements closer to the other end side.

Abstract: A wind turbine includes a nacelle and a rotor, the rotor being rotatably mounted on the nacelle by means of at least one main bearing unit. The wind turbine is characterized in that the main bearing unit includes at least one outer ring, at least one center ring and at least one inner ring and wherein the center ring is capable of rotation in relation to the outer ring and the inner ring or the outer ring and the inner ring are capable of rotation in relation to the center ring. A method for servicing a main bearing unit of a wind turbine and a use hereof are also provided.

Abstract: The present invention provides an apparatus and method for rotationally controlling a bearing assembly using a geared coupling system in combination with a supercharger including an input shaft. Generally, the geared coupling system includes a bearing assembly rotatably supporting a high speed shaft associated with an impeller, the bearing assembly including at least one inner bearing and at least one outer bearing; a drive gear associated with the input shaft and including a plurality of engaging members; and a geared coupler extending from a towards a plurality of engaging members adapted for engagement with the low speed gear, the geared coupler presenting an inner surface for receiving said inner bearing and an outer surface for receiving said outer bearing.

Abstract: In order to provide a rolling bearing for a wind turbine and a wind turbine which can prevent the deterioration of the lubrication condition even when the rolling bearing receives high load while the inner ring and the outer ring are kept still relative to each other, the wind turbine generator of the present invention for supporting a first member and a second member which rotates relative to the first member, comprises an inner ring to which the first member is fixed; an outer ring to which the second member is fixed; a center ring which is arranged between the inner ring and the outer ring and can rotate independently of the inner ring and the outer ring; rolling elements which are provided between the bearing rings in such a manner that the rolling elements can freely roll; and a center ring drive unit for rotating the center ring.

Abstract: A bearing arrangement includes a bearing outer element that defines a first plurality of races opening radially inwardly, a bearing inner element that defines a second plurality of races opening radially outwardly, and a bearing middle element defining a third plurality of races at its radially outer surface thereof and a fourth plurality of races at its radially inner surface thereof. Rolling elements are receivable in the races. The bearing middle element includes an axial protrusion at least at one end thereof that can be received in a housing with respect to which the bearing outer and inner elements are rotatable.

Abstract: A bearing arrangement for supporting a rotatable shaft relative to a support structure. The bearing arrangement has a first bearing having radially inner and outer races, the inner race being rotatable relative to the outer race in use, and a second bearing arranged such that the first bearing is mounted to the support structure via the second bearing. The second bearing may allow for deflection of the shaft supported by the bearing arrangement.

Abstract: A rolling bearing that has at least one first row of roiling elements and one second row of rolling elements as well as a common bearing ring for both rows.

Abstract: A modular bearing unit, including a plurality of bearings and bearing shells, wherein each bearing shell incorporates a main body, composed of two coaxial ball-races between which a ball ring, a coaxial neck, an external diameter of which matches an internal diameter of an interior cylindrical ring of the bearing shell, with a threaded surface, is established, so that each bearing shell can be coupled and fixed coaxially to another bearing shell through the threaded surface of the coaxial neck.

Abstract: On a two-shaft engine for an aircraft gas-turbine with a central low-pressure shaft, with a high-pressure shaft co-axially surrounding the low-pressure shaft and with bearing units supporting the shafts on the engine casing, the bearing loads of the high-pressure shaft are directed upstream towards the fan and the bearing loads of the low-pressure shaft are directed downstream. In order to reduce axial bearing load of the high-pressure bearing unit, the oppositely directed bearing loads of the low-pressure shaft (3) and of the high-pressure shaft (6) partly compensate one another, in that the front thrust bearing unit (10) of the high-pressure shaft (6) is supported on the engine casing (1) and the front thrust bearing unit (12) of the low-pressure shaft (3) is supported on the high-pressure shaft (6).

Abstract: The invention relates to a rolling-element bearing unit for rotatably bearing two components, nested into each other, which rotate about separate rotational axes that are at an angle to each other, especially the roll core and roll sleeve of a width stretching roll for a paper machine. The rolling-element bearing unit according to the invention comprises an outer rolling-element bearing for rotationally bearing the outer component, a pivoting bearing carrying the outer rolling-element bearing and allowing adjustment of the angle of the outer rolling-element bearing, an angularly adjustable inner rolling-element bearing for rotationally bearing the inner component, and an eccentric which consist of an inner and an outer eccentric ring via which eccentric rings the centers of the two rolling-element bearings can be adjusted in relation to each other.

Abstract: To enhance assembly and maintenance of a rear wheel suspension. Rear wheel axles extend to the left and right from a final case supported on a rear portion of a vehicle body frame, and rear wheels are independently suspended from left and right portions of a vehicle body. On the left and right sides of the final case, the rear wheel axles are connected to a left-side joint and a right-side joint, and the left-side joint is detachably attached to a side surface of the final case by a separate holder fitted with a driven sprocket meshed with a chain. A joint portion shaft of the right-side joint is borne on the final case through a bearing, a brake disk is attached thereto, and the joint portion shafts are spline connected. In assembling or disassembling, the separate holder can be attached and detached through petal-like cutouts formed in the driven sprocket.

Abstract: A rolling bearing device includes a bearing housing supported on a casing of a turbocharger, and a pair of rolling bearings mounted within the bearing housing and rotatably supporting a turbine shaft. A middle position between the pair of rolling bearings in an axial direction and a central portion of the bearing housing in the axial direction are offset from each other in the axial direction. Each of the rolling bearings includes an inner ring, an outer ring, an intermediate ring interposed between the inner and outer rings, a row of rolling elements rollably interposed between the inner ring and the intermediate ring, and a row of rolling elements rollably interposed between the intermediate ring and the outer ring. The intermediate ring has a damper function to be very slightly displaced or very slightly deformed elastically so as to damp vibration produced during rotation of the turbine shaft.

Abstract: The invention relates to a double-row angular contact anti-friction bearing having a split outer bearing ring, a one-piece inner bearing ring, and anti-friction bodies located in two rows between the two rings. The outer bearing ring is split axially into two individual rings. To permit simple, reliable and secure transport of the bearing, the individual outer bearing rings are interconnected by a connecting element in a positive fit that allows play and the outer surfaces of the individual rings have at least one recess, which is spanned by the connecting element. At least the recess of an individual ring has a groove, in which a hook element on the connecting element engages in a positive fit and the individual rings can be twisted in relation to one another.

Abstract: A rotary apparatus comprises a non-rotary part, a rotary shaft, a rotary member between the rotary shaft and the non-rotary part, an inside bearing between the rotary shaft and the rotary member, and an outside bearing between the rotary member and the non-rotary part. The inside bearing comprises first and second inside bearings spaced along a direction of a central axis of the rotary shaft. The outside bearing comprises first and second outside bearings spaced along the rotary shaft. An outer ring of the first inside bearing and an inner ring of the first outside bearing, and an outer ring of the second inside bearing and an inner ring of the second outside bearing, are fixed on the rotary member. By interlocking of the bearings, the rotary member slightly moves along the central axis, and at least two of the bearings receive respective preloads with a linkage relationship.

Abstract: A rear hub for a bicycle includes a shaft, a hub body mounted on the shaft, two races each mounted between the shaft and the hub body, two tapered bearings each mounted between the shaft and a respective race, a protruding pull block mounted on a first end of the shaft and rested on a first tapered bearing, and a locking nut secured on a second end of the shaft and rested on a second tapered bearing. Thus, the user only needs to screw the locking nut onto the shaft to pull the pull block to clamp the tapered bearings and the respective races, so that the rear hub is assembled easily, quickly and conveniently.

Abstract: A multi-speed transmission of countershaft design having a main countershaft and a hollow countershaft arranged concentrically and having likewise two load-shift elements. A first half of the shift elements is connected with a drive unit and a second half of the shift elements is connected to a gearbox input shaft. The gearbox input shafts and countershafts are mounted in a housing and connected to gear wheels, which intermesh in pairs as gear wheel pairs and can be connected or disconnected in order to reduce the overall gear ratio in the power flow. The main countershaft is mounted directly on the housing in the area of its first end and in the hollow countershaft in the area of its second end. The hollow countershaft is mounted in the housing in the area of its end that faces toward the end of the main countershaft that is mounted in the hollow countershaft.

Abstract: A motor assembly comprises a plurality of redundant bearings, a plurality of coaxial support elements, with at least one of the support elements rotatable about an axis of rotation, and an armature rotatably guided by the plurality of support elements to rotate about the axis of rotation. The bearings provide redundancy to continue armature rotation in the event one bearing fails.

Abstract: A device is presented having a multiplicity of motors connected to a shaft. A multiplicity of motor control devices are connected to the motors. A multiplicity of bearings are connected to the motors and the shaft. The multiplicity of motors, the multiplicity of motor control devices and the multiplicity of bearings continue to control the shaft rotation speed upon failure of either one of the multiplicity of motors, the multiplicity of motor control devices, or the multiplicity of bearings. Also presented is a device having at least one motor connected to a shaft. At least one bearing is connected to the at least one motor and the shaft. The at least one bearing has a multiplicity of rotating sleeves.

Abstract: A two-stage cross roller bearing (1) includes a first cross roller bearing (10) and a second cross roller bearing (20) that are disposed concentrically along a plane that is perpendicular to the bearing axis 1a. The inner ring of the first cross roller bearing (10) and the outer ring of the second cross roller bearing (20) are formed of a single ring-shaped member (14), with an inner ring-side raceway groove (13) of the first cross roller bearing being formed on the circular outer circumferential surface of the ring-shaped member and an outer ring-side raceway groove (21) of the second cross roller bearing being formed on the circular inner circumferential surface of the ring-shaped member. A small, compact, and flat multistage cross roller bearing is realized.

Abstract: A bearing is presented having a multiplicity of rotating sleeves. A bushing is connected to one of the multiplicity of rotating sleeves. At least one bearing set is connected to the multiplicity of rotating sleeves. Also, a bearing is presented having a multiplicity of rotating sleeves. At least two bearing sets are connected to the multiplicity of rotating sleeves. Another bearing is presented having a multiplicity of rotating sleeves. At least two bearing sets are connected to the multiplicity of rotating sleeves. A bushing is connected with one of the rotating sleeves.

Abstract: 30A centrifugal supercharger includes a case, a rotatable impeller, a high speed shaft drivingly coupled between the impeller and the engine, and a multiple bearing arrangement rotatably supporting the shaft on the case. The bearing arrangement includes a shaft bearing and a case bearing, each of which includes at least one set of relatively rotatable inner and outer races. The inner race of the shaft bearing is fixed relative to the shaft. The outer race of the case bearing is fixed relative to the case. The outer race of the shaft bearing and inner race of the case bearing are fixed relative to one another either by a spacer or by an integral, unitary construction. In addition, at least one of the bearings can include dual components (inner and outer races and ball rings). The ball rings of the shaft and case bearings can be coplanar to one an other or offset therefrom. A compressor having a compound bearing assembly is also disclosed.

Abstract: A centrifugal supercharger includes a case, a rotatable impeller, a high speed shaft drivingly coupled between the impeller and the engine, and a multiple bearing arrangement rotatably supporting the shaft on the case. The bearing arrangement includes a shaft bearing and a case bearing, each of which includes at least one set of relatively rotatable inner and outer races. The inner race of the shaft bearing is fixed relative to the shaft. The outer race of the case bearing is fixed relative to the case. The outer race of the shaft bearing and inner race of the case bearing are fixed relative to one another either by a spacer or by an integral, unitary construction. In addition, at least one of the bearings can include dual components (inner and outer races and ball rings). The ball rings of the shaft and case bearings can be coplanar to one an other or offset therefrom.

Abstract: A bearing is presented having a multiplicity of rotating sleeves. A bushing is connected to one of the multiplicity of rotating sleeves. At least one bearing set is connected to the multiplicity of rotating sleeves. Also, a bearing is presented having a multiplicity of rotating sleeves. At least two bearing sets are connected to the multiplicity of rotating sleeves. Another bearing is presented having a multiplicity of rotating sleeves. At least two bearing sets are connected to the multiplicity of rotating sleeves. A bushing is connected with one of the rotating sleeves.

Abstract: An absorber for damping vibrations in a rotating component includes a primary part connectable to the rotating component so as to be fixed against rotation relative thereto; an absorber mass; the primary part and the absorber mass being couplable to one another via a damping and spring coupling so that the absorber mass is rotatable to a limited extent relative to the primary part; at least two antifriction bearings for mounting the absorber mass on the rotating component; the two antifriction bearings being nested within one another, so that one of the antifriction bearings is seated on a larger radius than the other; and an intermediate ring disposed in a radial direction between the two antifriction bearings.

Abstract: A centrifugal supercharger includes a case, a rotatable impeller, a high speed shaft drivingly coupled between the impeller and the engine, and a multiple bearing arrangement rotatably supporting the shaft on the case. The bearing arrangement includes a shaft bearing and a case bearing, each of which includes at least one set of relatively rotatable inner and outer races. The inner race of the shaft bearing is fixed relative to the shaft. The outer race of the case bearing is fixed relative to the case. The outer race of the shaft bearing and inner race of the case bearing are fixed relative to one another either by a spacer or by an integral, unitary construction. In addition, at least one of the bearings can include dual components (inner and outer races and ball rings). The ball rings of the shaft and case bearings can be coplanar to one an other or offset therefrom.

Abstract: A rotary bearing includes concentric radially spaced-apart inner, intermediate and outer rings whose opposing surfaces define inner and outer ball tracks. An inner array of balls roll along the inner track and an outer array of balls roll along the outer track and a viscous lubricant is present between the rings. When the inner and outer rings are angularly reciprocated relative to one another and that reciprocation is changed, the intermediate ring is moved intermittently in a selected direction about the rotation axis so that the balls recirculate about the axis and redistribute lubricant along the tracks.

Abstract: A three-ring needle bearing with a central support shaft, a center ring around the shaft, an outer ring around the center ring, and an inner needle array between the shaft of the center ring and an outer needle array between the center ring and the outer ring. An axial disk at one axial end of the bearing push fit on the center ring and radially projecting past both the inner needle array and the outer needle array for axially supporting them. The outer ring having bend-in moldings which past the axial disk at one end and past the end of the outer needle array at the other end. A drive shaft rotates the center ring, which is eccentric with reference to the support shaft.

Abstract: A rotary bearing includes concentric radially spaced-apart inner, intermediate and outer rings whose opposing surfaces define inner and outer ball tracks. An inner array of balls roll along the inner track and an outer array of balls roll along the outer track and a viscous lubricant is present between the rings. When the inner and outer rings are angularly reciprocated relative to one another, the intermediate ring is moved intermittently in a selected direction about the rotation axis so that the balls recirculate about the axis and redistribute lubricant along the tracks. In a preferred embodiment, the relative angular excursion of the inner and outer rings is increased periodically beyond a selected maximum angle to effect the advancement of the intermediate ring using the lubricant as a ratcheting mechanism.