Abstract: A revolving joint comprising at least one anti-friction bearing and an electromotive drive unit. The anti-friction bearing is in contact with at least one row of rolling bodies arranged in a row rotating the joint around the rotational axis of the anti-friction bearing. The rolling bodies are in contact with at least one race that can be driven to rotate by the drive unit.

Abstract: An automatic transmission includes a case; a speed change mechanism; a torque converter having a lock-up clutch axially arranged and freely slidably toward and away from the input shaft; a thrust bearing interposed between the flange unit and the side face of the sleeve unit on the input shaft side; a ball bearing that includes an outer race, a side face of which contacts the first step portion toward the input shaft side, and a propeller shaft connecting member capable of connecting with a propeller shaft, spline-engaging with the outer periphery of the output shaft, and contacting a side face of an inner race of the ball bearing upon being pressed axially toward the input shaft side by the propeller shaft.

Abstract: A central drive shaft-sliding knuckle combined with a peripheral crank pin-swing link mechanism (CSPS) to provide an orbiting scroll with radial and axial compliant capability. The CSPS mechanism can be applied to both dual floating scroll and single floating scroll structures to improve performances of scroll devices, particularly in oil-free operations. In addition, an orbiting dual thrust ball bearing mechanism is provided to take thrust load in, for example, a floating scroll compressor with a CSPS mechanism.

Abstract: The instant invention relates to a cam shaft (1) for internal combustion engines of motor vehicles, which is supported on a cylinder head housing (15) via at least one roller bearing (2), wherein provision is made for at least one thrust bearing (3), which supports the cam shaft (1) in axial direction (4) and which is embodied as ball or also as roller bearing (2).

Abstract: A wheel axle dismounting device includes a rod screw with a head portion; a screw cylinder with a concave portion and mounted on the rod screw; a pushing element mounted on the rod screw for pushing a wheel axle; a combining element mounted on the rod screw; a fixing cylinder with an accommodation space and penetrated through by the rod screw; a first thrust bearing with a first end portion and a second end portion that can rotate with respect to each other, mounted by the head portion of the rod screw; and a second thrust bearing with a third end portion and a fourth end portion that can rotate with respect to each other, mounted in the concave portion of the screw cylinder. The user can rotate the rod screw and the screw cylinder to readily mount and dismount the wheel axle, with the first thrust bearing and the second thrust bearing providing an upward force.

Abstract: A sensor assembly includes an insert mounted within a fixed structure and tabs that engaged the insert to secure the sensor assembly in a desired orientation. A cap is assembled over the sensor assembly and the interface between the tabs and the insert to prevent undesired removal.

Abstract: There is provided a roll machining apparatus which can accurately support a roll by means of hydrostatic bearings while absorbing thermal expansion of the roll in the length direction e.g. due to a change in room temperature, thus enhancing the machining precision.

Abstract: In a screw compressor for a refrigerator, suction-side rotor shafts of screw rotors are supported rotatably by angular ball bearings for forward thrust load, an annular gap is formed between the angular ball bearings and a suction-side bearing casing, and outermost end faces of outer rings of the angular ball bearings are pressed through a spring member by means of a presser member fixed to an end face of the suction-side bearing casing, whereby the angular ball bearings are held movably in the thrust direction within the suction-side bearing casing. Discharge-side rotor shafts of the screw rotors are supported rotatably by angular ball bearings for forward thrust load and an angular ball bearing for reverse thrust load which are held at predetermined certain positions within a discharge-side bearing casing. A screw compressor which permits structural simplification, reduction of size, and lightening of a maintenance burden is provided.

Abstract: A wheelchair swivel platform that allows a standard, unmodified wheelchair or other non-swiveling chair and an occupant to swivel about an area of a workstation, in much the same way as a modem swivel office chair. The wheelchair swivel platform includes a top plate 16 and a bottom plate. The bottom plate serves as a base for the platform which lies on the floor to support the top plate 16. The top plate 16 swivels about the bottom plate while supporting the wheelchair. A rotation locking device prevents rotation of the platform during positioning of the wheelchair on and off the platform.

Abstract: A rolling bearing composed of a combination of bearing wings formed with a steel material and rolling elements formed with a ceramic material, wherein the residual austenite amount of the steel material forming the rolling rings is controlled to a specific value. By the construction, at rolling of the rolling elements formed with a relatively hard ceramic material, the occurrence of the surface scratches of the rolling elements can be restrained, which results in restraining the vibrations and noises caused by the rolling bearing.

Abstract: A suspension strut used in a wheel suspension of an automotive vehicle, includes a shock absorber, a suspension strut bearing, and a coil spring at least partially coaxially surrounding the shock absorber and having one spring end supported by the shock absorber. The suspension strut bearing includes two plastic carrier elements, and a roller bearing positioned between the carrier elements. One carrier element is a guide ring connected to a vehicle body of the vehicle, and the other carrier element is a single-piece housing having incorporated therein plural hollow chambers in partial concentric surrounding relationship to the shock absorber and formed with a guide collar and a support surface for supporting the other end of the coil spring. The guide ring has a radially inner collar and a radially outer collar which together receive the roller bearing and extend at least beyond a midsection of the roller bearing.

Abstract: The present invention relates to a height-controlling device of a swivel chair. An objective of this invention is to prevent the detachment of components which are fitted to the end of a piston rod of a cylinder, resulting in the improvement of work conditions. The height-controlling device of the present invention is comprised of an elastic body 620, bearing supports 42 and 44, and a ball bearing 50 which are fitted to the end of a piston rod 610 of a cylinder 12; and a retaining washer 1 which is fixed to the piston rod and prevents the detachment of the elastic body, the bearing supports and the ball bearing component from the piston rod. Alternatively, the height-controlling device of the present invention is comprised of an elastic body 620 and a bearing support 42 which are fitted to the end of a piston rod 610 of a cylinder 12; and a thrust bearing 500 which is fixed to the piston rod and functions as both the bearing support 44 and the ball bearing component 50.

Abstract: Suspension thrust bearing with retaining means Suspension thrust rolling bearing device of the type comprising a first ring 12, a second ring 13 made of thin sheet, a row of rolling bodies 14 arranged between the two rings, a cap 16 secured to the first ring and a plate 11 capable of forming a seat for a spring 10. The plate 11 comprises a means for securing it directly axially to the second ring 13 or to the cap 16.

Abstract: A scroll compressor (10) includes a housing (11) with a stationary scroll member (13) mounted therein and a swivel scroll member (12) positioned in the housing and cooperating with the stationary scroll member to form a compression chamber (16). A thrust bearing has a first bearing ring (40) for attachment to the housing (11) and having a plurality of circular bearing races (42,54), a second bearing ring (45) for attachment to the swivel scroll member (12) and having a plurality of circular bearing races (47,55), and a plurality of balls (56) retained between the rings in associated pairs of the races. The races can have rounded tip (50,51), pointed tip (57,59,60,61,62), plateau (52,53) or flat center (54,55) portions. The first bearing ring (40) can have a thickness (C) different than a thickness (D) of the second earing ring.

Abstract: A length-adjustable column for chairs or the like comprises an upright tube with a longitudinal axis and a piston-and-cylinder unit radially supported and displaceably guided in the direction of the longitudinal axis. A lengthwise end of the piston-and-cylinder unit is locked by means of an axial bearing on a base plate of the upright tube in the axial direction. For this purpose, the axial bearing is axially fixed to the lengthwise end of the piston-and-cylinder unit. The axial bearing has at least two locking arms which lock it to the base plate of the upright tube, and a securing bolt which is pushed by the piston-and-cylinder unit between the locking arms to secure the locking.

Abstract: A rolling bearing composed of a combination of bearing wings formed with a steel material and rolling elements formed with a ceramic material, wherein the residual austenite amount of the steel material forming the rolling rings is controlled to a specific value. By the construction, at rolling of the rolling elements formed with a relatively hard ceramic material, the occurrence of the surface scratches of the rolling elements can be restrained, which results in restraining the vibrations and noises caused from the rolling bearing.

Abstract: A suspension thrust-bearing device for a telescopic suspension strut of a motor vehicle which includes a rolling bearing forming an axial thrust stop, a metal cup for accepting a suspension spring, and an elastic support block. The rolling bearing is positioned between the metal cup and the elastic support block which is secured to the frame of the motor vehicle. The rolling bearing includes an upper race placed within a cap which is in contact with the support block, and a lower race. The cap is provided with means for axially retaining the metal cup, to form a unit assembly, and acts as an interface between the upper race and the elastic support block. An outer cylindrical portion of the cap covers the periphery of the metal cup.

Abstract: A thrust ball bearing includes first and second circular ring shaped bearing disks arranged in spaced-apart disposition and moving eccentrically to one another so that bearing balls, arranged therebetween, roll on pertaining circular tracks. Both circular ring shaped bearing disks are made from a through-hardenable ferrous material to thereby permit realization of a particularly high fatigue strength.

Abstract: The present invention provides a rolling bearing having an excellent corrosion resistance and toughness which can fairly operate at a high rotary speed. At least the inner race is formed by a titanium alloy, and the rolling elements are formed by ceramics. Alternatively, at least one of the inner race and the outer race is formed by a &bgr; type titanium alloy. The percent cold working of the &bgr; type titanium alloy is predetermined to not less than 20% or a range of from 5 to 20%. The cold working is followed by shot peening. Further, the surface hardness Hv is predetermined to not less than 600. The volumetric ratio of residual &bgr; phase in the &bgr; type titanium alloy is predetermined to a range of from 30 to 80%.

Abstract: The object of the present invention is to provide a spindle motor of high accuracy of rotation irrespective of the temperature differential for driving the hard disk or disks of the hard disk drive device. A spindle motor including a shaft secured on a base to extend vertically therefrom, and a rotor hub journalled rotatably around the shaft through a plurality of anti-friction bearings each of which has outer and inner races and rotational bodies disposed between races, characterized in that a cylindrical sleeve having a through bore is disposed between outer peripheral surface of each anti-friction bearing and an inner peripheral surface of a central bore provided through the rotor hub, the sleeve and the outer races of the anti-friction bearings are made of the ferrous metal material of substantially the same coefficient of expansion, and the inner races of anti-friction bearings and the shaft are also made of the ferrous metal material of substantially the same coefficient of expansion.

Abstract: A movable race 25 fixed to a movable scroll 20 which revolves with respect to a fixed scroll and a fixed race 24 opposing the movable race are respectively provided with pluralities of annular ball rolling grooves 24c and 25c extending along the revolutionary locus of the movable scroll and a plurality of balls 26 are held sandwiched between the plurality of ball rolling grooves 25c of the movable race and the plurality of ball rolling grooves 24c of the fixed race. Further, the radius of revolution S1 to be obtained by the movable race, the plurality of balls, and the fixed race is made smaller than the radius of revolution S2 to be determined by the scroll wall of the movable race and that of the fixed race.

Abstract: A bearing design for a rotatable assembly includes two freely rotating balls mounted on the axis of rotation of the assembly and axially separated, one near each axial end of the assembly. Each ball is confined by a moving concave bearing surface of the rotatable assembly and a corresponding fixed concave bearing surface of a mounting attached to a frame, housing, or similar non-rotating structure. One of the fixed mountings is preferably attached to a compressible spring to provide a controlled axial pre-load to the assembly. The balls are substantially enclosed and lubricant provided in the enclosed cavity. In the preferred embodiment, the rotatable assembly is a rotary actuator assembly of a disk drive. Compared to conventional ball bearing designs, the present design reduces the number of parts and volume of space occupied by the bearings, reduces hysteresis, and improves shock resistance.

Abstract: A thrust bearing for bearing a load along a force vector includes at least two roller elements in rolling contact with one another and arranged along the force vector such that the load is borne through the roller elements. The roller elements are retained within a retainer such that they remain aligned along the force vector while subjected to loads. The retainer used to house the roller elements may be designed to abut the roller elements at minimum points of contact, or alternatively to distribute the load borne by one or both of the roller elements across a greater surface area. One application of the preferred thrust bearings is in an apparatus such as a keyboard support for reducing repetitive stress injuries. A main disk is rotatably coupled to a base and supports a support member on a plurality of the thrust bearings.

Abstract: A motor and a recording and/or reproducing apparatus using the motor. The motor includes a rotational member, a fixed member, a stopper member and a set of balls. The rotational member is formed by bending a first plate, and includes a first V-shaped bearing guide groove and central rotational shaft having a hole formed therein. The fixed member is formed with a second V-shaped bearing guide groove and bent portions which are used to attach the fixed member to a chassis. The balls are mounted in the first and second V-shaped bearing guide grooves and allow the rotational member to rotate relative to the fixed member. The stopper member is inserted through a central opening in the fixed member and is received in the hole formed in the rotational shaft, thereby connecting the rotational member to the fixed member so that the motor can be transported as a unit without separating.

Abstract: A rotatable axial thrust bearing having an upper race upper race flat region and an upper race rounded ball bearing retainer section; a lower race having a lower race flat region and a lower race rounded ball bearing retainer section; an annular retainer for retaining the ball bearing and the lower and upper race without interfering with the lower race when the lower race is placed on a sloped surface. The annular retainer is made up of an upper race retainer lock portion and an outer ball bearing retainer portion positioned on an outer periphery of the thrust bearing. The annular retainer additionally consists of a lower race retainer lock, and an inner ball bearing retainer portion positioned on an inner periphery of the thrust bearing.

Abstract: The inner circumference 4a2 of the bearing ring 4a is square-shaped, and the outer circumference 4a3 thereof is circular. The shoulder 1a1 of the attaching portion 1a of the scroll member 1 is formed to be square-shaped, corresponding to the inner circumference 4a2 of the bearing ring 4a. When attaching the bearing ring 4a to the attaching portion 1a, the square-shaped inner circumference 4a2 of the bearing ring 4a is fitted to the square-shaped shoulder 1a1 of the attaching portion 1a. Thus, by fitting the inner circumference 4a2 of the bearing ring 4a to the shoulder 1a1 of the attaching portion 1a, the bearing ring 4a is prevented from rotating with respect to the swivel scroll member 1.

Abstract: A ball bearing for supporting a spindle rotating at high speed is provided with at least one member of an inner race and a shaft having an inner raceway in an outer peripheral surface thereof, an outer race having an outer raceway in an inner peripheral surface thereof, and a plurality of balls having 3 mm or less in diameter which are rollingly provided between the inner raceway and the outer raceway, the balls being arranged along a pitch circle 11 mm or less in diameter. A bearing steel or stainless steel which is used to form the member having the raceway is reduced to 6% by volume or less in the amount of retained austenite, so that the raceways are improved in impression resistance. This eliminates the difficulty that the impression of the raceway lowers the acoustic characteristic.

Abstract: A backup bearing for supplying backup to magnetic bearings is provided, the backup bearing comprising: an outer race disposed about the axis of a stationary shaft, the outer race mounted to a flywheel assembly for rotational movement about the axis; an inner race spaced from the outer race and disposed about the axis, the inner race being substantially stationary with respect to the axis; and a plurality of rolling elements each having a central axis with each element being spaced from the inner race and disposed between the inner and outer race for rotational movement therebetween.

Abstract: The contact angle of each of the balls of a thrust ball bearing for use with power rollers is deviated from 90 degrees. Thus the power roller is not easily displaced in the radial direction when radial loads are exerted. Also, the distance in the radial direction between the acting point of loads applied to the circumferential surface of the power roller and the contacting point of the rolling surface of each ball and the inner ring raceway is decreased. In this way, any bending stresses to be exerted on the power roller by the application of the aforesaid loads are eased.In another embodiment, the thickness dimension of the outer ring is made greater in the portion closer to the inner circumference, and smaller in the portion closer to the outer circumference with the outer ring raceway as boundary. Thus the width dimension of the circumferential surface of the power roller is made larger, and the strength of the outer ring is enhanced against bending stresses.

Abstract: A thrust ball bearing in which the lives of a power roller and an outer ring can be ensured without increasing a rotational resistance. The thrust ball bearing can thus be improved in durability without impairing the performance of a toroidal type continuously variable transmission having such a thrust ball bearing built thereinto. Fracture toughness K.sub.1c of a material forming the power roller is made higher than fracture toughness K.sub.1c ' of a material forming the outer ring (K.sub.1c >K.sub.1c '). Further, the maximum contact surface pressure P.sub.max between an inner ring raceway and the respective balls is made smaller than the maximum contact surface pressure P.sub.max ' between an outer ring raceway and the respective balls (P.sub.max <P.sub.max ').

Abstract: A cage with bearing balls' confined therein is interposed between a plate and a planar platform, to accommodate rotation of the plate, and an electrically-powered device, such as a searchlight, can be fastened to the plate for rotation therewith. A disk, with a plurality of radially-extending fingers, is secured to the platform and is in biasingly restraint of the plate to (a) inhibit an unwarrantedly free rotation of the plate, i.e, to impose a controlled drag on the plate rotation, and (b) to enable the inverted operation of the overall combination.

Abstract: A unitized thrust bearing for reducing axial frictional forces resulting from axial loads on first and second abutting parts rotated relative to one another in a fishing reel. The thrust bearing has an annular outer race having a forward wall with a rearwardly facing surface and a forwardly facing surface and a bore for axially receiving the first abutting part. The outer race further includes a peripheral sidewall. The outer race is configured to be axially received in a seat in one of the first and second abutting parts. The thrust bearing further includes an annular inner race having a center shaft receiving bore, a rearwardly facing surface defining a support surface for the other of the one of the first and second abutting parts having the seat and a forwardly facing surface defining an axial ball contacting surface. The inner and outer races are axially received one within the other.

Abstract: According to an illustrative example, a chair column comprises a stand tube. A gas spring is inserted in the stand tube with the piston rod thereof directed downwardly toward an abutment wall of the stand tube. The lower end of the piston rod is connected to the abutment wall and is rotatably supported on the abutment wall by a ball bearing. The ball bearing comprises two bearing discs and a plurality of balls therebetween. The bearing discs and the balls are pre-assembled by a cage. The bearing can be pre-assembled before it is combined with the lower end of the piston rod and is mounted thereafter on the lower end of the piston rod. The cage remains within the chair column when the gas spring is inserted subsequently into the stand tube together with the bearing.

Abstract: An anti-blockage bearing for use in rotary core drilling of rock or other hard earth. Situated between the upper end of a freely suspended core barrel assembly and the core barrel coupling, the invention consists of spherical bearings retained within an upper and a lower annular housing, one or both of which are provided with a thrust race comprising a plurality of indentations and intervening ridges. During normal drilling, the core barrel is freely suspended within the outer tube of the lower end of the drill string. In the event of blockage, the core barrel will automatically be pushed upwards causing the thrust race of the lower housing member to bias the bearings against the thrust race of the upper housing member. As the bearings encounter the ridges and indentations of the thrust races, a jarring vibration action is imparted to the core barrel, dislodging the blockage.

Abstract: An axial deep groove ball bearing is disclosed. This rolling bearing has a housing ring with a fastening rim located axially beyond the outer face of the housing ring. A ring of synthetic material or rubber is located between the fastening rim and a housing.

Abstract: An axial actuator wherein an output rod is controlled axially by a recirculating-ball screw-nut screw coupling, the screw of which is formed on the rod, and the nut screw of which is supported in rotary and axially-fixed manner on a support and rotated in relation to the same by a motor; the nut screw constituting the intermediate ring of a double thrust bearing mounted, via the interposition of a flexible support, between two opposite surfaces on the support.

Abstract: A multi-color printing apparatus for screen printing workpieces in diverse colors. The apparatus has a plurality of printing units, each located at a work station, and spaced about a central support. A number of radially extending support arms cantilevered from a rotatable central support carry the workpieces between printing stations. After being indexed to its approximate final position at a particular work station, the support arms engage a brake pad to absorb rotational energy and to control motion of the support arm during a final, precise alignment step wherein a fork member is advanced toward a roller mounted on the support arm to precisely align and lock the support arm during the screen printing operation. Also disclosed is a collar for rotatably mounting the central support at its bottom end. The collar has two portions, one mounted to the central support and the other mounted to a desired location in the printing apparatus.

Abstract: An improved clutch release bearing assembly includes a sliding sleeve providing first and second sliding surfaces respectively facing the bore of a bearing and a guide element extending through the bore, both surfaces minimizing binding, wear or excessive friction between the bearing and the guide element during relative reciprocal motion therebetween. The sleeve, preferably fashioned from plastic, finds particular utility in a clutch release bearing surrounding a transmission shaft retainer or quill tube. The length of the sleeve is such that the bearing may slide on an outer sliding surface for a predetermined distance.

Abstract: A ball thrust antifriction bearing for operation at very high speed in the DN number range from 5.times.10.sup.5 to 2.times.10.sup.6 and higher while only marginally lubricated by a mist of liquid having comparatively poor lubricating qualities which is carried in a transporting air stream.

Abstract: A bearing which is to be acted upon by an axial load applied at a point radially displaced outside the bearing and which provides even load distribution. A number of bearing supports are distributed around the circumference of the bearing and are so arranged that the load is transferred to the bearing at a point displaced radially inwards toward the center of the bearing.

Abstract: A thrust ball bearing unit has a pair of ringed cylindrical upper and lower casings, each casing being made of synthetic resin, a pair of upper and lower races, and a buffer interposed between the upper casing and the upper race or between the lower race and the lower casing. Alternatively, two buffers are interposed between the upper casing and the upper race and between the lower race and the lower casing respectively. The upper and lower casings have peripheral sealing portions which are in a labyrinth or contact seal relationship with each other.

Abstract: An improved self-centering bearing assembly for clutch release mechanism includes a radial bearing with a rotatable inner and non-rotatable outer race. The outer race is resiliently held for radial self-centering movement by an attachment member which mounts the bearing assembly to a plastic carrier of the clutch release mechanism. The resilient element that allows self-centering is compressed between a radial flange of the attachment and a face of the outer race. When removed from the carrier, the resilient element expands sufficiently to bias the radial flange into a radially extending portion of a declutching finger contacting member rigid to the inner race. This retains the attachment member to the bearing as a separately handled, rattle-free unit.

Abstract: A thrust ball bearing using balls as the rolling members of the bearing comprises first and second races having track grooves having a cross-sectional radius slightly greater than the radius of the balls, a retainer for retaining the balls interposed between the first and second races, and a third race circumscribing the balls and positioning the balls slightly inwardly of the track diameter of the bearing.