Abstract: Apparatus comprising an inner member having an axis and an axially extending outer surface, an outer member having an axially extending inner surface, the inner and outer members being rotatable relative to each other about the axis, a bearing between the inner and outer surfaces, the bearing having a radially extending bearing surface, and a bearing retainer assembly including a first retainer which engages the bearing surface and which has a first tapered surface, a second retainer having a second tapered surface engaging the first tapered surface, an axially extending retainer surface engaging one of the inner and outer members, and a radially extending retainer surface, each of the first and second tapered surfaces tapering radially away from the one of the inner and outer members and axially away from the bearing, a spring engaging the retainer surface, and a cap which is fixed to the one of the inner and outer members and which engages the spring so that the spring is compressed between the cap and the

Abstract: A disk for use in a bearing assembly of an open end spinning machine having four disks arranged in two pairs and which operate at up to 15,000 RPM's while the rotor shaft turns at up to 125,000 RPM's. The disk pairs are arranged to form a wedge shaped gap supporting the shaft of a spinning rotor for rotation. Each disk comprises a metallic hub which mounts a synthetic ring. The synthetic ring has a spinning rotor contact surface comprising a shoulder arranged atop a helically disposed rib which extends around and across the contact surface. The shoulder imparts an axial thrust against the spinning rotor during operation of the spinning machine.

Abstract: An adjustable spacer of the type shaped as a ring for mounting between a pair of tapered bearings mounted on an axle or spindle to allow a load to be axially placed on the bearings is disclosed. The adjustable spacer may include an extension located at a radius from an imaginary axis of the spacer, a contact means oriented radially outward from the extension, and a compressible area located between the contact means and the extension wherein the compressible area deforms when a predetermined load is applied to the ring in the axial direction. The adjustable spacer may be configured to be used with an adapter sleeve for use on axles or spindles of multiple radius.

Abstract: Apparatus for refining fibrous material comprising first and second opposed refining disks, at least one of said first and second opposed refining disks being rotatable, a rotary shaft for rotatably mounting said at least one of said first and second opposed refining disks, a bearing housing for mounting said rotary shaft, a stand for stationary mounting of said bearing housing, said bearing housing including first and second bearings supporting said rotary shaft, said first bearing for at least carrying axial forces from said at least one of said first and second opposed refining disks and said second bearing for at least carrying radial forces therein, first and second bearing seats axially movable within said bearing housing, each of said first and second bearings being rigidly mounted in said first and second bearing seats, and prestressing structure mounted between said first and second bearing seats.

Abstract: A thrust bearing assembly includes a bearing housing and a shaft supported therein in a front and rear spherical thrust roller bearings. First and second spring devices are provided to pre-load the front and rear bearings. The bearing pre-load exerted by the first spring device acts on the front bearing in a direction opposed to a working load applied to the front bearing. The first spring device removes the spring force from the front bearing race rings, when exposed to a working load exceeding the load exerted by the first spring device. The first and second spring devices under working load and idle conditions being arranged to provide clearance between the rear bearing outer race and a bearing housing seat for the rear bearing outer race for allowing tilting of the outer race in order to compensate for radial oscillations, thereby avoiding rubbing movement between the outer race ring and the housing.

Abstract: An antifriction roller bearing, in which two sets of units are arranged so as to face each other in an one-axis direction. Each unit comprises an inner ring, an outer ring and rollers, the inner and outer rings being provided respectively with a raceway track of mono-hyperboloid of revolution about the one axis. The rollers are arranged so as to come into linear contact with the inner and outer raceway tracks and slant to a plane including the one axis at an angle. An energizing means is arranged between both the inner rings or both the outer rings to energize the inner rings or the outer rings so as to narrow down the spacing of the raceway tracks, the outer rings or the inner rings which are not subject to the energizing force being stationary.

Abstract: The present dump block (100) comprises an internal plate (106) attached to an external plate (108) with a rotatably mounted sheave (110) therebetween. The external plate (108) presents a smooth convex surface. Bearings (126) are mounted between the sheave (110) and a centrally located shaft (122). The position of the bearings (126) is maintained by a bearing side plate (116) A side plate bearing cushion (124) is located between the bearing side plate (116) and the bearings (126). The bearing cushion (124) absorbs the force of any impacts experienced by the dump block (100). Likewise, the convex surface of the external plate (108) turns any impact into a glancing blow, thereby extending the life of the dump block (100).

Abstract: A bearing housing assembly for a roller includes a housing; bearings provided in the housing and having first and second bearing components provided in the housing with the components being relatively rotatable, a retaining cup holding the components in the housing, and a resilient biasing device held in the housing so as to transmit force to at least one of the components so as to urge the components relative to the housing. The biasing device is preferably a frusto-conical spring and the bearings are preferably taper roller bearings.

Abstract: The present invention relates to an axial hydrostatic thrust-bearing for an axial and radial bearing unit. This consists of two hydrostatic axial bearings (12, 13) acting on either side of a pressure plate or flange (14) which is connected to the shaft (6). The hydrostatic bearings, each of which is equipped with at least one fluid pocket supplied with fluid from an external flow source, exhibit an external form such that, in combination with the bearing housing, they form the hydraulic pressure chambers C and D. These pressure chambers in turn are in direct contact with the pressure chambers A and B of the of the linear servo motor, which in turn are formed by the frame (1), the bearing housing (2) and a back plate (3). The pressure inside the chambers A and B is regulated via a servo valve (8) in proportion to the externally applied axial loading.

Abstract: A bearing chocking assembly for mill rolls includes an inner ring engageable with the bearing structure and having on its outer face axially inclined wedge-shaped cam surfaces. These surfaces are arranged to come into contact with similar mating surfaces on the inward face on an outer ring. Both of the rings have circumferential flanges with axial holes around their entire circumference to enable the flanges to be bolted together upon being rotated to effect axial positioning of the assembly. The inner ring rests on a surface of the mill roll shaft and is secured in place by a split thrust ring disposed in the shaft groove. This assembly enables a mill roll to be removed for regrinding and replaced without separating the rings from one another and avoids the need for removing a split inner adjustment ring from the groove. Provision of flanges with holes around their entire circumferences allows for fine adjustments over a wide range of positions.

Abstract: A brushless motor whose stator keeps hold of coils and is made of either magnetic-power-blended resin by molding techniques, or magnetic powder by sintering techniques.

Abstract: A composite motion guiding unit comprises a shaft provided with helical ball screw grooves formed in the outer peripheral surface thereof and ball spline grooves formed in the outer peripheral surface thereof so as to extend in the axial direction of the shaft across the ball screw grooves and a ball screw nut and a ball spline outer cylinder both mounted on the shaft to be engageable with the ball screw grooves and ball spline grooves respectively through a number of balls. The ball screw nut and the ball spline outer cylinder are both supported by a housing to be rotatable through bearings and are driven by driving means to rotate the same, thus constituting a composite motion guiding apparatus. The ball screw grooves and the ball spline grooves have depths equal to each other.

Abstract: A preload control apparatus for use in a spindle (12) of a machine tool comprises a bearing (16,17) and a plurality of springs (26a to 26d) for exerting a preload on the bearing (16, 17). Some or all of the springs (26a to 26d) are at least partly made of a shape memory alloy so that the preload on the bearing (16,17) can be adjusted with changes in temperature of the springs (26a to 26d).

Abstract: A bearing isolator assembly (70) suitable for use with tapered bearings (20) is provided. The bearing isolator assembly comprises a retaining member (72), a radial wave spring (74) and a separate axial wave spring (76).

Abstract: A self-adjusting assembly for wheel bearings for an automotive vehicle in which the wheel of the vehicle is rotatably mounted on a spindle supported by an inner and outer wheel bearing, the self-adjusting assembly providing selective pressure on the outer wheel bearing to maintain its position by way of a threaded self-adjusting nut threadedly mounted onto the spindle or axle, a nonrotatable fixed washer mounted on the spindle, a biasing element positioned between the threaded self-adjusting nut and fixed washer, the biasing element engaging the self-adjusting nut and the fixed washer in order to provide inward pressure on the outer wheel bearing once the outer locking nut is secured to the spindle.

Abstract: An assembly (10) by which to effect incremental adjustments to the end play, or preloading, to a bearing set (12). Relatively rotatable first and second ring means (25 and 35) have contiguously juxtaposed and interacting ramp surfaces (29 and 36). In addition, the first ring means is operatively secured to the housing (14) in which the bearing set is supported in such a manner as to preclude rotation of the first ring means (25) with respect to the housing (14). A tang (30) presented from the first ring means (25) may interact with a slot (31) in the housing (14) to secure the first ring means (25) against rotation. The second ring means (35) is selectively rotatable with respect to the first ring means (25) to effect axial translation of the first ring means (25) by virtue of the interaction between said opposed, contiguously juxtaposed ramp surfaces (53) and 54).

Abstract: In a device for supporting arm driving shafts, articulating portions of adjacently provided first and second arms constituting a parallel link type robot are rotatably supported, via separately provided bearings, from supporting posts projecting from the robot structure, and the first arm and second arm are also coupled through another bearing. All of these bearings are of a type in which an axial force applied to either one of inner and outer races of the bearing beforehand presses rolling members of the bearing toward the other of the races, while a pressing plate is provided for applying the axial force to one of the bearings. The application of the axial force shifts the supporting frame of the first arm relative to the driving shaft of the second arm, so that all of the bearings are prepressurized for eliminating unnecessary play.

Abstract: A spacer designed for fitment between pairs of oblique rolling bearings (taper roller, ball bearings or similar) for enabling adjustable axial positioning of the same inside a support assembly, e.g. the hub-axle assembly of a vehicle suspension, the outer element of which presents a through hole for enabling adjustment of the spacer; which spacer consists of a pair of coaxial annular elements, the first engaged partially in sliding manner inside the second; a third annular element mounted externally and in axially mobile manner on the first element and designed to act as a shoulder for the second element; and locking mechanism for selectively securing the third element in a number of predetermined axial positions on and integral with the first element.

Abstract: Two rolling bearings, (10, 11) are mounted in pair and arranged to take up axial and radial loads. In order to prevent occurrence of abrasion corrosion the outer race rings (17, 18) are mounted in sleeves (19, 20) which to a limited extent are movable axially and radially relative to the bearing housing (13). The sleeves (19, 20) are designed with tapering contact surfaces (21, 22) adapted to center the sleeves during operation.

Abstract: A device for supporting the drive shaft of a marine propulsion unit wherein a single thrust bearing that supports the drive shaft against its thrust loads is biased by means of an elastic connection between the water pump and the drive shaft for simplifying the construction and eliminating the necessity for separate biasing springs for this purpose.

Abstract: An inter-shaft bearing in a multiple body turbo-engine having an outer first shaft and an inner second shaft comprises bearing rollers disposed between an outer ring mounted on the first shaft and an inner ring mounted on the second shaft. The first shaft and the outer ring are provided with cooperating conical surfaces, and a plurality of fly-weights are disposed between the rear face of the outer ring and a retaining nut mounted on the first shaft. Each of the fly-weights has an inclined rear face which cooperates with a conical surface of the nut so that when centrifugal action during operation of the engine causes the fly-weights to move radially outwards they are simultaneously forced axially forwards to exert a thrust on the outer ring which thus tends to restrain the bearing through the action of the cooperating conical surfaces of the outer ring and the first shaft, thereby controlling bearing play.

Abstract: A tail rotor flapping hinge elastomeric bearing in which the inner and outer races are split and the races have ramped surfaces with the higher slope of the inner races being toward the outer edge of the bearing. The races have a plurality of slope angles and each inner race having a groove therein to facilitate a method of preloading.

Abstract: A variable stiffness bearing utilizing piezoelectric means for applying a variable preload force to the bearing. The preferred embodiment employs piezoelectric wafers having alternating power and ground connections to the wafers to allow the wafers to distort in direct proportion to the potentials applied. Increased potentials result in greater distortion, more preload force, and a stiffer bearing.

Abstract: A tapered roller bearing has an outer ring and an inner ring, a row of rollers between the rings and a cage or separator. The inner ring has spaced apart flanges or lips between which the rollers move. The cage includes an annular ring at the radially smaller side which has undulations circumferentially around that ring. The indulations have axially inwardly directed crests that rest against and are pretensioned to urge the rollers toward the other inner ring flange. The webs of the cage between neighboring rollers have radial projections which engage the flange at the radially smaller side of the bearing. The distance between the plane which passes through the axial end surfaces of those radial projections and the plane which is defined by the tips of the undulation crests against the ends of the rollers is slightly greater than the difference between the distance apart of the flanges and the length of the rollers between the flanges.

Abstract: A self-aligning bearing assembly for use with a frame and a shaft. The assembly comprises bearings such that the shaft can move relative to the frame and a spring and a friction surface for repositionably mounting the bearings relative to the frame. The spring and friction surface for repositionably mounting the bearings can frictionally hold the bearings in a first position relative to the frame and can allow the bearings to move to a second position relative to the frame and be frictionally held in the second position when repositioned thereto without affecting the critical speed of the shaft system.

Abstract: Twin combined radial-and-thrust antifriction bearings in a mounting for a rotatable member, such as a tunneling cutterhead or a tunneling cutter, can be tightened or preloaded by pressing spaced bearing races against a spacer ring therebetween to contract the spacer ring. Alternatively the rotatable member may be a cutter composed of a rim mounted on a hub having an external circumferential groove extending partially under the base of such rim by a retaining ring received in such groove and having portions thereof staked beneath the rim to anchor the retaining ring in place. The cutting rim may be of generally equilateral triangle cross section having opposite base angles clipped to provide narrow parallel walls and the apex being truncated to provide a crest included angle of 80 degrees to 100 degrees. The slant slides of the cutting rim are concave to enable the apex of the rim to be sharpened more effectively.

Abstract: The present invention provides a bearing assembly for use in a display assembly having a plurality of louvers which rotate in synchronism with each other and, in doing, displays different advertising messages. The bearing assembly includes a housing having an axis and a shaft extending axially through the housing. A pair of axially spaced bearings rotatably mount the shaft to the housing. A pair of collars are secured to the shaft so that the bearings are contained in between the collars while a Belleville washer is sandwiched between one collar and one bearing and exerts a compressive force on the bearings and a tension force on the shaft in order to compensate for bearing wear and manufacturing tolerances. A novel construction for mounting the louvers in their frame is also disclosed.

Abstract: A clearance-free bearing bushing for universal joints which has a plurality of conical rollers located between a bearing bushing and a journal pin or the like. The rollers are pressed against their raceways by a spring element with a predetermined tension. On the side of the conical rollers facing away from the spring element, there is a thrust ring or the like, made of resilient material, which is free to move axially and which rests against the end surface of the conical rollers.

Abstract: A motor for rotating a magnetic disk comprises an armature concentrically secured to a center shaft affixed to a mounting frame. A rotor frame having a cylindrical side wall of uniform outside diameter is rotatably supported in a cantilever fashion on a free end of the center shaft by a pair of bearings encircling the outer peripheral surface of the armature and a magnetic disk support that projects from the side wall. A permanent magnet secured inside the side wall is disposed to interact with magnetic fields produced by the armature. The cantilever support makes it easier to bring armature leads through a hole in the mounting frame as a part of the manufacturing process.

Abstract: A bearing device for an axle comprises a housing arranged about a portion of the axle, a pair of bearings each having a predetermined clearance mounted between the housing and the axle for rotation of the axle with respect to the housing; two opposed offset pairs of corresponding steps, including a first step of each pair on the outer periphery of the axle, and a second step of each pair on the inner periphery of the housing for positioning the bearings on the axle in the axial direction; and a clamping device for securing the bearings against axial movement on the axle beyond the predetermined clearance.

Abstract: A first shim mounted on the shaft extending from the high pressure end face of a screw rotor in a screw compressor establishes the operating clearance between the high pressure end face of the rotor and the high pressure end wall of the compressor's working chamber by fixing the axial position of a bearing group which is likewise mounted on the rotor shaft. A second shim, disposed between the bearing group and a spring biased spacer element, is determinative of the distance the spacer element, and therefore the rotor, can travel in a direction toward the high pressure end of the compressor under the impetus of reverse axial thrust. Contact of the rotor with the high pressure end wall of the working chamber is positively precluded because movement of the spacer element, under the influence of rotor movement toward the high pressure end of the compressor, collapses the biasing spring which causes the spacer element to contact a fixed surface of the compressor.

Abstract: An outer cup made from flat sheet metal encloses an inner cup also made from flat sheet metal. The inner cup has an open end adapted to receive the end of a rotatable member, such as a shaft. The other end of the inner cup has a closed end axially spaced from the closed end of the outer cup to provide a lubricant reservoir in communication with the rollers in the annular space between the cups.

Abstract: A precision centerable, rotatable shaft assembly (60) has a shaft (62) and a housing (64) extending generally axially along the shaft (62). The shaft (62) is journalled to the housing (64) by a first roller bearing assembly (66) and a second roller bearing assembly (68). The first roller bearing assembly (66) is connected to the shaft (62) near end (80) and a second roller bearing assembly (68) is connected to the shaft (62) near end (83). The first roller bearing assembly has a first inner race (70) fixedly attached to the shaft (62) and a first outer race (74) fixedly attached to the housing (64). The outer race has an inner surface (78) tapering toward the shaft (62) approaching the end of the shaft (62). The second roller bearing assembly has a second inner race (82) fixedly attached to the shaft (62) and a second outer race (86) axially movable within the housing (64) toward the first roller bearing (66).

Abstract: A device for automatically adjusting the clearances in a roller bearing due to thermal expansion, constituting a tapered roller bearing having a dual track oppositely tapered inner race and a pair of single track tapered outer races, each outer race being in communication with a pair of coaxial, hydraulically loaded annular pistons, each of which translates in annular piston cylinders, supplied with hydraulic fluid. The hydraulic pressure of the fluid is maintained through an accumulator at a preselectable constant pressure to permit the outer races to translate axially, against the annular piston, as the inner race expands radially due to thermal expansion. Upon thermal contraction, the pressure forces the annular pistons axially toward the outer races, which, due to the taper of the races and the bearing elements, reduces the clearance created due to the thermal contraction.

Abstract: A scheme for accurately and quickly axially positioning a rotatable member such as the axles of a differential or a shaft supported impeller of a centrifugal pump within a housing or similar support for rotation therein with predetermined axial bearing clearance which is independent of the dimensional variations of the member and support is disclosed wherein a deformable spacing element is associated with each thrust carrying bearing with the adjacent bearing and spacing element being held axially captive between the shaft and a corresponding disc which is slidable relative to the housing and with one disc axially aligned and limited in sliding movement in one common direction opposite the direction from which the rotatable member is positioned by engagement with the housing. Typically there are two discs, one limited in movement toward the interior of the housing and the other limited in movement by the housing.

Abstract: A bearing device for wheel axles, in particular for the axles of a railway car bogie, is such that a bearing housing encloses a wheel bearing comprising an inner ring fitted on the axle and an outer ring with rollers, balls or the like between the said rings, the inner ring being held securely in place by a nut screwed on to the said axle. Energy storage means, to accommodate forces acting on the wheel bearing in the operating position, are provided between the wheel bearing and the bearing housing.

Abstract: A bottom plate for emplacement in a bushing having an opening defined by an internal peripheral side wall and a bottom of the bushing. A pin, like the pin of a universal joint cross piece, is received in the opening of the bushing with rollers around the periphery of the pin for permitting rotation of the pin in the opening of the bushing. The bottom plate is disposed between the bottom end of the pin and the bottom of the bushing. Radially extending lubricant distribution grooves are defined in the bottom plate. First ones of the grooves extend over the region beneath the bottom end of the pin along the side of the bottom plate opening toward the pin. Second ones of the grooves extend over the region of the bottom plate beneath the rollers along the side of the plate and opening toward the bottom of the bushing. A step-like transition is defined between the first and the second ones of the grooves in the bottom plate.