Abstract: A bearing for an arbor or staff of a rotary wheel set of a timepiece movement, the bearing including a bearing block provided with a housing and an endstone arranged inside the housing, the endstone having a main body provided with a cavity configured to receive a pivot of the arbor of the rotary wheel set, the pivot having the shape of a first cone having a first solid angle, the apex of the first cone being rounded with a predefined first radius of curvature in a range from 0.2 ?m to 50 ?m, the cavity having a second cone shape with a second solid angle, greater than the first solid angle, so that the pivot can rotate in the cavity, the apex of the second cone being rounded and having a predefined second radius of curvature. The second radius of curvature is smaller than the first radius of curvature.

Abstract: The present disclosure relates to a bearing arrangement for supporting a shaft, in particular a shaft of a gearing mechanism for an electromechanical brake booster, having: at least one bearing, a shaft, which is at least section-wise accommodated in the at least one bearing and has a protruding, rounded region on at least one of its axial end surfaces, at least one spring element, that engages the protruding, rounded region in order to prestress the shaft in the axial direction.

Abstract: A braking device comprising a body mounted for rotation about a first axis; means for rotating the body about the first axis; comprises a second axis, a third axis and a fourth axis, the braking device being configured as to enable the body to further rotate about the second axis and the third axis, the first axis being oriented with respect to the second axis at an alpha angle (?) which is greater than 0 degrees, the second axis being oriented with respect to the fourth axis at a beta angle (?) which is greater than 0 degrees and less than 90 degrees, the third axis being the precession axis about which the precession of the body occurs as a result of rotating the body about the first axis and applying torque to the body about the second axis.

Abstract: A butterfly valve comprises a housing including a bore, a rotatable shaft passing through the bore, a disc mounted to the shaft for controlling the flow of a fluid through the bore, a thrust load reacting section and a wear interface. The thrust load reacting section includes a thrust plug assembled in a thrust reacting end of the shaft and a thrust plate secured to the housing. The thrust plate has a well for axially retaining the thrust plug and the thrust reacting end of the shaft. The wear interface includes a first contact region on the thrust plug with a first contact surface and a second contact region at the base of the well with a second contact surface. A portion of the first contact surface is spherical and in contact with a portion of the second contact surface.

Abstract: The invention pertains to a martial arts training device, a kit for assembling the device, and a method of using the device. The device includes a vertical elongate shaft supported by a rotary bearing, the rotary bearing supported by a base such that the shaft can rotate freely 360 degrees in either direction, the device including at least four arms, each arm extending out from the shaft at about a right angles thereto, the arms being located in spaced apart relationship both with respect to the length of the shaft and with respect to orientation around the shaft in a plane normal to the shaft, wherein each arm after a first arm has a predecessor arm along the shaft, and each arm after the first arm is rotated at least 60° with respect to its predecessor arm.

Abstract: A thrust bearing and method of assembling a thrust bearing, the bearing comprising: an outer housing having a substantially circular base, wherein a cylindrical side wall and a central post are upstanding from the base; an outer ball seated on and at least partially within the outer housing; and an inner ball mounted on the central post, wherein the outer ball is sandwiched between the inner ball and the outer housing.

Abstract: A lead screw for a linear actuator, which has a metal pipe having a helical projection resin-molded on its outer surface, and a ball for a pivot bearing welded to a distal end of the metal pipe, is disclosed together with a method of manufacturing the same. With the lead screw according to this invention, a slight positional deviation from the origin, which is caused at a high ambient temperature by thermal expansion of a resin material filled up in the metal pipe, can be prevented reliably. Linear movement upon rotation of a stepping motor can take place with high precision.

Abstract: A bushing structure 10 is constructed and arranged to be operatively associated with a shaft 24 of an electric motor 22. The motor has a housing 30 including a generally elliptical recess 32 therein defined along an axis C of the shaft. The bushing structure includes a generally cylindrical bushing member 12 constructed and arranged to engage an end of the shaft so as to locate the shaft with respect to the housing and to prevent lockup of the motor. An endplay member 20 is associated with the bushing member and with the end of the shaft. The endplay member includes a spherical portion constructed and arranged to be received in the elliptical recess so as to control endplay of the shaft.

Abstract: A motor includes a rotor section with a rotor shaft having an end section, and a stator section including a yoke section disposed opposite the rotor section. The motor is also equipped with a bearing assembly having a bearing member that includes a main bearing section with a recess section and a ball bearing received in the recess section wherein the ball bearing rotatably support the end section of the rotor shaft, and a bearing holder defining a center through hole that slidably holds the main bearing section of the bearing member in the axial direction, wherein the bearing holder is formed from a sintered compact member.

Abstract: A bearing arrangement for an articulatable support (6) comprises bearing assemblies (20/28, 22/29, 24/30 and 26/32). In one embodiment the assemblies comprise a ball (20, 22, 24, 26) and aperture (40 FIG. 2) having sliding contact at discrete areas (36) during relative rotation. In another embodiment the sliding contact may be formed at a ball (20,22,24,26) and a plastics e.g. P.T.F.E. support (84, 85 FIGS. 10 and 11). Resilient displacement of the bearing contact along a rotational axis (A and B) is provided by planar spring supports (28, 32) and rigid support is provided by supports (29 and 30).

Abstract: A motor includes a rotor section with a rotor shaft having an end section, and a stator section including a yoke section disposed opposite the rotor section. The motor is also equipped with a bearing assembly having a bearing member that includes a main bearing section with a recess section and a ball bearing received in the recess section wherein the ball bearing rotatably support the end section of the rotor shaft, and a bearing holder defining a center through hole that slidably holds the main bearing section of the bearing member in the axial direction, wherein the bearing holder is formed from a sintered compact member.

Abstract: A spindle motor having a pivot which tip portion can easily be formed by a spherical surface having high precision, high hardness, the diameter of which can be determined as desired, the tip portion 6a of the pivot 6 is formed by cutting a steel ball used in a bearing or the like having any diameter. The pivot 6 having a spherical surface 6a is formed by fixing the pivot tip portion 6a to one side surface 6c of a substantially cylindrical shaft portion 6b. As a result, the spherical surface having a high precision, high hardness which diameter can be determined as desired can easily be formed at the tip portion 6a of the pivot 6.

Abstract: A metallic receiving plate is located in a holding recess of a housing such that the plate opposes the distal end face of a worm shaft. The distal end of the receiving plate with respect to the rotating shaft defines a charging cavity in the holding recess. A resin material is charged into the charging cavity. A metallic ball is located between the distal end face of the worm shaft and the receiving plate. The ball makes point contact with the distal end face of the worm shaft and with the receiving plate. Two protrusions are formed on the receiving plate. The protrusions are embedded in the resin material to connect the receiving plate to the solidified resin material and to prevent the receiving plate from rotating. Thus, the rotational resistance of the worm shaft is reduced, and the durability of the bearing device is improved.

Abstract: An efficient bearing includes jutting anchor flanges directly extending from a front end of the bearing for coupling with an air fan spindle housed in the bearing. The air fan spindle thus may have a precise axis and less floating or sinking during rotation to achieve better balance. The bearing barrel further has a plurality of plane surfaces formed on the exterior peripheral surface to couple with the air fan seat securely to increase air fan rotation efficiency.

Abstract: A bearing, which may be used to mount a swing arm on the frame of a computer disk drive, has an outer race provided with two raceways of arcuate cross section. Each raceway has a row of raceway balls located along it. The raceway balls of each row, in turn, surround and bear against a separate pivot ball. The two pivot balls are greater in diameter than the circles described by the innermost areas of the rows of raceway balls, so that the pivot balls when urged together bear against the raceway balls of the two rows and urge them against their raceways. The force which urges the two pivot balls together may derive from spring-loaded arm engaged with one of the balls.

Abstract: A shaft structure for rotational support by a non-ball type bearing includes a spherical rotation-supporting section and a non-spherical section. The spherical rotation-supporting section provides a support for the shaft when the shaft rotates in an axial hole of the non-ball type bearing, thereby reducing the frictional area between the shaft and the inner periphery of the axial hole of the non-ball type bearing.

Abstract: Spindles of spinning and twisting machines have a rotatable shaft supported in a bearing housing. The bearing housing comprises a neck bearing, a step bearing as well as a radially movable step bearing tube, which is arranged in an oil bath. The diameter of the shaft at the step bearing tube measures at the most six times the diameter at the neck bearing. Preferably, the diameter at the step bearing tube measures no more than between 3 and 3.5 mm. Thus the absolute bearing clearance in the step bearing tube can be significantly reduced, which results in a quieter running of the spindle and to a reduction in power consumption for the drive.

Abstract: In the case of a shaft for an open-end spinning rotor a supporting element is fixed in a concentric recess of the shaft. The supporting element is disposed with a radially extending supporting surface against a vibrating ball of a step bearing. A ball is used as a supporting element, a section of which ball projects out of the recess. The projecting section is radially flattened in relation to the shaft and thus forms the radially extending supporting surface. Because of its ball shape, the supporting element can be easily placed in the recess. In the case of a misaligned arrangement of the vibrating ball, the radial flattening prevents the axial position of the open-end spinning rotor from being displaced and undesirable radial forces being exerted on the shaft.

Abstract: A bearing apparatus for use in an floppy disc drive device motor having a sleeve bearing and a thrust bearing is provided which is characterized in that there is provided a thrust bearing having such a convex portion, a projection, or a concave portion that makes the rotation shaft of the motor inclined with respect to the center axis of the sleeve bearing. Therefore, the rotation shaft ofa motor can be forcibly inclined with the rotation shaft and the sleeve bearing being kept in contact with each other. In addition, it is possible to reduce deviation in inclination of the motor rotation shaft and to ensure electric conductance between the motor rotation shaft and the motor body. These advantages are attained by a specific structure in which a projection, a convex portion, or a concave portion is provided at the thrust bearing, and therefore, the structure is simple and requires low costs.

Abstract: In the case of a shaft for an open-end spinning rotor, a supporting element arranged at a step bearing extends the shaft. The supporting element is arranged centrical to the axis of the shaft. The supporting element is affixed to the shaft by means of a separate holding part, which engages with the circumferential surface of the shaft to enable in a simple way, an exact axial and radial positioning of the supporting element on the shaft.

Abstract: A bearing mount particularly useful for mounting a non-driven end of a rotary shaft of an inclined or vertical agitator used for the processing of materials such as pharmaceuticals, cosmetics, foodstuffs and the like in kettles wherein such materials are mixed or stirred either with or without scraping of inner wall surfaces of the kettles, the present bearing mount provides a bearing surface for the distal end of the rotary shaft of the agitator which extends into the interior of the kettle toward inner walls of the kettle and which said distal end requires a bearing mount to hold the end of the shaft in a desired spaced relation from the wall of the kettle. The bearing mount of the invention comprises an idler bushing mounted to the distal end of the shaft, the idler bushing having bearing surfaces which are complementary with bearing surfaces provided by an idler pin removably mounted to an idler base fixed to the inner wall of the kettle.

Abstract: A rotating polygon mirror driving apparatus has a rotor having a rotating polygon mirror fixed thereto, a rotational shaft and a rotor magnet; a bracket having a base plate provided opposite to the rotor magnet and a collar forming a bearing holding portion of a resin outserted to the base plate and made; and a bearing fitted to the bracket so as to support the rotational shaft. The driving apparatus can be decreased in cost and thickness while maintaining excellent rotational precision and mechanical precision.

Abstract: In a dynamic pressure bearing apparatus for use in a rotary polygonal mirror type light deflector in a laser beam printer, a rotary head in a video tape recorder and the like, the apparatus includes a rotary shaft having a shaft end surface, a sleeve for rotatably supporting the rotary shaft through fluid, and a generator for generating dynamic pressure in a thrust direction. The sleeve has an end portion with a thrust receiver surface opposed to the shaft end surface. The dynamic pressure generator is formed on the thrust receiver surface. One of either the shaft end surface and the thrust receiver surface is convexly shaped for tolerating a non-flat surface of the shaft end surface and the thrust receiver surface.

Abstract: In the motor with the worm reduction gear, wherein a worm is provided at an end portion of a rotary shaft, a worm wheel is in meshing engagement with the worm and rotation of the rotary shaft is reduced in speed and transmitted to load, such an arrangement is adopted that a first damper and a second damper, which are different in elasticity from each other, are provided at end portions in the axial direction of the rotary shaft, and, at an initial stage where the thrust force from the rotary shaft is low, only the elastic force of the first damper lower in elasticity acts on the rotary shaft and, at a stage where the thrust force becomes high, both the elastic forces of the first damper and the second damper act on the rotary shaft.

Abstract: An improved bearing arrangement for a high-speed, preferably vertical, shaft having a bearing body which takes up both the axial and the radial bearing forces. The bearing body is clamped or mounted in a fixed support solely by means of at least one elastic membrane-type element, e.g. a disc-shaped membrane, which extends in the radial direction so as to provide for the elastic return of the bearing body and the shaft to an initial reference position in both radial and axial directions.

Abstract: A rotor having an elongated cylindrical body which surrounds a vertically disposed bearing shaft fixedly secured at its lowermost end to a supporting base, the rotor mounting a bearing pad at its uppermost end positioned to be seated on the upper end of the bearing shaft so as to rotatably suspend the rotor from the bearing shaft, stabilizers being provided to maintain concentric rotation of the rotor about the bearing shaft as the rotor is driven by a flowing fluid.

Abstract: An anti-skid device of the type including an arm, carrying in its outer end a chain-provided pulley that is brought in contact with a vehicle wheel so that the chains are thrown in under the vehicle wheel. The arm is, in its inner end, journaled in a U-shaped or fork-shaped bracket via a short axle that, in its ends, rests in bowl-shaped hemispherical bearings that are threaded into the legs of the bracket. The bearing bowls are pretensioned against the axle. At the apex of the shaft's spherical ends, recesses are made that take-up lubrication grease and, in this way, a point-like contact between the bearing shells and the axle is eliminated.

Abstract: A bearing for a vacuum device having an annular permanent magnet disposed about a rotatable shaft which has one end exposed to low pressure and the other end exposed to atmospheric pressure in which the rotatable shaft has a spherical member formed on the high pressure end for mating with a concave bearing surface having a magnetic fluid interposed therebetween and the rotatable shaft has a plurality of grooves formed thereon for aligning with a plurality of rings formed on an annular pole piece in which a magnetic fluid is disposed between the rings and grooves, which can be formed on the shaft, for providing a high pressure seal.

Abstract: A hydraulically-operated piston machine includes at least one cylinder and a piston axially movably guided in the cylinder. The piston is connected to a crankshaft or the like by means of a connecting rod. The connecting rod and the piston each have spherically-shaped bearing surfaces serving for connecting the connecting rod and the piston with each other in an articulated manner. The connecting rod defines at its end connected to the piston a radially outwardly facing spherical surface portion which is arranged concentrically with the spherical bearing surface of the connecting rod. The spherical surface portion rests against the surface of a recess defined in the piston, so that a hollow space is defined between the surface of the recess and the spherical surface portion. The piston defines a bore for effecting communication of fluids between the interior of the cylinder and the hollow space.

Abstract: A bearing device of a rotary cylinder for a magnetic head includes a fixed shaft and a sleeve rotatably supported about the fixed shaft through a radial bearing. A thrust receiver secured to one axial end of the sleeve has a convex spherical surface at the side confronting the fixed shaft, and a concave spherical surface is formed on an end surface of the fixed shaft confronting the convex spherical surface. A radius of curvature of the concave spherical surface is larger than a radius of curvature of the convex spherical surface of the thrust receiver.

Abstract: In a spherical pump, having a separation wall separating the wet part from the dry part of the pump, the column for the ball of the spherical bearing is made from the same material as the separation wall and is clamped in a cylindrical protrusion of the separation wall.

Abstract: A dynamic pressure type fluid bearing device in which a housing and a shaft rotatable relative to each other are opposed to each other to provide inner and outer bearing surfaces for radial load. One of these bearing surfaces is formed with a groove for generating dynamic pressure and the housing and the shaft are opposed to each other in a first and a second bearing surface for thrust load. A circulation path for circulating lubricant is formed in at least one of the housing and the shaft and opens in the first and/or second bearing surface.

Abstract: The trackball device includes two supports for the trackball, each of which has a code wheel associated therewith. The journals on the end of each shaft and the bearing surfaces of the pillow block associated with the shaft are constructed to have substantially point contact and thereby minimize friction.

Abstract: A support assembly for a washing machine includes a mount secured to the assemblage of working parts of the machine and adapted to move with the assemblage during operation of the machine and a cabinet structure enclosing the assemblage of working parts and having a base. An intermediate member is positioned between the mount and the base for movably supporting the mount and the assemblage of moving parts from the base. The base and intermediate member are formed with a first set of mating support surfaces for sliding movement therebetween and the mount and the intermediate member are formed with a second set of mating support surfaces for sliding movement therebetween. One set of the support surfaces is smoothly curved with a relatively short radius of curvature to form a first node for movement of the mount and the other set of support surfaces is smoothly curved with a relatively long radius of curvature to form a second node for movement of the mount.

Abstract: A support assembly for a washing machine includes a cabinet structure for enclosing the various working parts of the machine and a mount secured to the assembly of working parts of the machine for movement therewith. The cabinet base has an upwardly facing generally spherical bearing surface and the mount includes a generally spherical lower support surface. An intermediate member is positioned between the bearing surface and support surface and is formed with opposed spherical faces complimentary to the bearing surface and to the support surface respectively.