Abstract: The invention relates to an antifriction bearing (W2) for an NMR tomograph (KT) having magnetic rolling members (23), and having an inner ring (21) and an outer ring (22) between which the rolling members (23) roll along, the outer ring (22) being surrounded by a nonmagnetic ring (24). The invention also relates to the use of a magnetic antifriction bearing (W2) for an NMR tomograph (KT).

Abstract: A crankshaft directly connected to an electric motor and operably connected to a drive load is supported at two locations with bearings that are respectively subject to different amount of bearing loads. A resilient member is interposed between the inner race of one or both of the bearings and the crankshaft for applying an axial pre-load to the bearings. The weight of the crankshaft and the rotor, and/or a magnetic attractive force generated in the electric motor is/are applied to the bearing as an axial pre-load in addition to the pre-load by the resilient member.

Abstract: A system for monitoring the operational status of a plurality of mechanical components, such as various bearings, speed reducers and the like. Each of the mechanical devices includes a respective local transmitter in electrical communication with various local sensors. Among the sensors which may be utilized are a temperature sensor and a shaft speed sensor, as well and an accelerometer for detecting vibration. The local transmitter receives information from the sensors and provides status information in a predetermined output format, such as a serial digital format. Unique electronic identifiers are assigned to respective of the local transmitters to facilitate selective communication with a central monitoring processor. As a result, the status information will be supplied to the central monitoring processor at predetermined times.

Abstract: A roller contact bearing unit, in particular for the hub of a vehicle wheel, including a radially outer rotating race (10), a radially inner stationary race (11), a sealing device (16) between the races (10, 11) and a device for measuring the rotation speed of the outer race (10). The measuring device includes an encoder wheel (13) in the form of a radially oriented annular disc made of plastic or rubber magnetized material, and an annular insert made of non-magnetic metal (14) which is suitably shaped to form: a constraining means (14a) for fixing the insert (14) onto the outer race of the bearing unit, an axial abutting means (14b) suitable for abutting against a lateral surface (10b) of the outer race (10), an annular seat (14c) for housing and externally enclosing the encoder wheel (13), and a support means (14d) for a rubber element (15) which forms a sealing covering (15b) suitable for sliding against a surface (16) which forms part of a non-rotating element (11) of the bearing unit.

Abstract: A magnetic disc drive system includes a hydrodynamic bearing. The magnetic disc drive system includes a disc drive chassis, a magnetic storage disc, and a read/write transducer adjacent to the disc for reading and writing information on the disc. The hydrodynamic bearing assembly rotatably couples the magnetic storage disc to the disc drive chassis. The hydrodynamic bearing assembly includes a fluid path therethrough for circulating a fluid. A permanent magnet is placed in the fluid path and used for attracting magnetic particles carried in the fluid.

Abstract: A center bearing assembly adapted to rotatably support a rotatable shaft on a vehicle frame includes an annular roller bearing that is adapted to receive and rotatably support the rotatable shaft, a support member for supporting the roller bearing, and a bracket for securing the roller bearing and the support member on the vehicle frame. The support member includes a reservoir containing a Theological fluid. A rheological fluid is any fluid that exhibits a significant change in its ability to flow or shear upon the application of an appropriate energy field, such as electrical or magnetic fields. A shear plate secured to the roller bearing includes a portion extending into the reservoir so that axial movement of the shaft with respect to the support member is permitted. The novel construction of this invention includes an effective center bearing assembly support member having variable vibration dampening characteristics which can also accommodate axial movement of the rotatable shaft.

Abstract: A rolling contact bearing with rotational speed measuring device, in particular a wheel bearing for motor vehicles for telemetric transmission of energy and signal between bearing and environment, insensitive to tolerances of the bearing and its surrounding parts, with simple and cost-effective construction and small dimensions. A first telemetry unit is integrated in the inter-ring seal. It comprises pulse transmitter, rotational speed sensor, telemetry electronics and a miniature coil, which is inductively coupled with a further telemetry unit, which is fitted axially outside the bearing, and which supplies the first telemetry unit with energy and receives its signals.

Abstract: An apparatus for maintaining a predetermined positional relationship of a screw, the apparatus comprises a ball bearing track having a first and second track member in a spaced apart relationship, and having a ball bearing therein for permitting rotation of the first track member with respect to the second member, and an element in a spaced apart relationship with respect to the ball bearing track for permitting the element to provide magnetic attraction between the first track member and the element.

Abstract: An open end spinning machine has a spinning rotor, an electric motor with an axial component of a main field having a rotor and a stator, a bearing housing for the spinning rotor, the rotor of the electric motor being arranged on the spinning rotor while the stator of the electric motor being arranged in the bearing housing, and a short shaft arranged so that the spinning rotor is supported on the short shaft near its center of gravity at least in a radial direction limitedly elastically in the bearing housing and magnetically pre-tensioned in an axial direction.

Abstract: The invention relates to a process for providing a bearing of a tilting device, which makes possible a tilt around at least one axis, with a tilting member, a base member, and a bearing situated between these two members. The center of gravity of the tilting member is situated at the pivot point of the bearing. A first portion of the tilting member is arranged above the pivot point, a second portion of the tilting member is arranged below the pivot point, and the weight of the first portion of the tilting member and the weight of the second portion of the tilting member correspond to each other.

Abstract: To provide a bearing structure of a flat type brushless motor for floppy disk drive in which a stator is arranged in a plane shape and a disk acting as a rotor yoke rotates along the plane shape without the use of conventional ball bearings so that the bearing structure can be high in the rigidity, stable in the motion, and low in the cost. For having a maximum bearing length, the bearing structure comprises a support shaft arranged with its axis extending depthwisely of the motor and having two journal regions provided on both ends thereof and a recessed region thereof between the two journal regions; and a rotor shaft mounted in the center of the disk and having a cylindrical body thereof onto which the journal regions of the support shaft are rotatably fitted. Accordingly, the motor will minimize the frictional loss of the sleeve bearing and increase its operational life. Also, the steadiness (of deflection, inclination, and rigidity) in bearing action will be enhanced.

Abstract: A magnetic bearing for magnetic centering of a rotor relative to a stator relative to two radial centering axes includes actuators operating relative to centering axes and speed sensors having sensing axes coplanar with the centering axes. The rotor includes a ring partly defining the airgaps of the actuators and the sensors.

Abstract: The invention is intended to facilitate surface processing for generation of dynamic pressure and to prevent degradation of the bearing performance due to temperature changes. To this end, a shaft is composed of an axially magnetized magnet and shafts of magnetic material holding the magnet therebetween. The shaft is press-fitted in an insertion hole in a non-magnetic sleeve. Pole pieces are placed on the upper and lower edges of a hole in a motor hub. Clearances defined by the outer peripheral surface of the sleeve and the inner peripheral surface of the motor hub are filled with a magnetic fluid. In order to generate a dynamic pressure in the magnetic fluid, surface processing is applied not to the magnet but to the outer peripheral surface of the sleeve. Further, the thermal expansion coefficient of the sleeve is greater than that of the motor hub.

Abstract: An improved bearing apparatus including a housing having a bearing assembly contained therein. A sensor device is mounted to the housing for detecting the rotational rate of the shaft. The sensor device may be configured as a magnetic-type sensor operative to sense variations in magnetic characteristics produced during rotation of an annular detection element. Alternatively, the sensor device may be an optical sensor for detecting variations in optical characteristics produced by shaft rotation. In some presently preferred embodiments, the detection element is a nut or collar also utilized to effect securement of the bearing assembly to the shaft. Preferably, the shaft terminates at an interior location of the housing. In this case, the housing may include an end wall or cap for covering an end of the shaft.

Abstract: An apparatus (10) includes a vehicle drive shaft (12), a roller bearing (16) supporting the drive shaft (12) for rotation, and a housing (18) which contains and supports the roller bearing (16) in a vehicle. The roller bearing (16) includes an inner race (34) rotatable within an outer race (36). The apparatus (10) further includes a damper assembly (20) which damps vibrations radially between the roller bearing (16) and the housing (18). The damper assembly (20) defines a closed chamber (150) containing rheological fluid (152), and has a flow-inducing part (80) projecting into the fluid (152). The flow-inducing part (80) of the damper assembly (20) is movable radially within the fluid (152) in response to radial vibrations of the outer bearing race (36).

Abstract: A rolling bearing unit with rotating speed detector comprising an inner ring member with an inner ring raceway and a rotatable outer ring member with an outer ring raceway, a plurality of rolling bodies provided between the inner ring raceway and outer ring raceway, an annular, magnetic tone wheel fitted to the outer ring member, a support ring fitted to the axial end of the inner ring member, an annular sensor supported by the support ring so as to be faced to the tone wheel generally in a circumferential direction, the sensor comprising an annular magnetic pole piece, annular permanent magnet and annular coil, so that one end in magnetic orientation of the permanent magnet is placed adjacent to one end portion of the pole piece, while the other end in magnetic orientation is placed magnetically adjacent to the tone wheel, the coil provided adjacent to the pole piece, the tone wheel having cut-outs formed with a uniform pitch in a circumferential direction and faced across a clearance to a portion of the pol

Abstract: Devices and methods employ a solid-based medium that serves as a magnetic sealant, a lubricant, a bearing, an electrical or thermal conductor, singly or in combination. Included are devices wherein the solid-based medium is retained in a selected position using a magnetic field. In particular, the solid-based medium is either magnetically coupled to the magnetic field or is contained within a cavity sealed by a magnetic seal. In one group of embodiments, the solid-based medium comprises molecules having a molecular structure wherein one element of the structure is a cage or tube, as in fullerenes or met-cars. Such molecules are particularly useful in all of the devices of the present invention because of their exceptional stability and resilience. These properties ensure good performance in corrosive and/or vacuum environments and over a longer lifetime than is possible with conventional media.

Abstract: A bearing unit in which two oil sintered slide bearings are fitted in a bearing space of non-magnetic bearing housings to be spaced away from each other and a magnetic fluid is interposed between a rotary shaft and the oil sintered slide bearings to rotatably support the rotary shaft. The rotary shaft is made from a material having permeability, and a ring-shaped permanent magnet is fixedly provided between the two oil sintered slide bearings to be spaced therefrom. The magnetic fluid is held between the two oil sintered slide bearings to be circulated.

Abstract: The rolling-contact bearing comprises one outer race 11, two inner races 12,13, two rows of rolling bodies 14 held in cages 15 and a built-in device for detecting the speed of rotation, of the type comprising a sensor means 17 and an encoder means 19 which are located in the annular chamber defined between the inner races 12, 13 and outer race 11 and the rolling bodies 14. The encoder means 19 comprises an active part 20 capable of creating in the sensor means 17 a periodic signal of frequency proportional to the rotational speed of the bearing 1. The encoder means 19 comprises a support part 21 secured to the inner races 12,13 and made of a nonmagnetic material, so that the said support part 21 axially holds the inner races 12,13 against each other before the bearing 1 is mounted in the mechanical assembly for which it is intended.According to the invention, the encoder axially secures the inner races after the bearing has been assembled and cannot come into contact with the rolling bodies.

Abstract: A bearing unit with a rotational speed detection unit has a tone wheel which has recesses on its outer peripheral surface and rotates with the magnetic hub and the inner ring, a sensor which has a first stator with notches and a second stator, and a permanent magnet, so that due to the changes in phase of the notches and recesses, the density of the magnetic flux from the permanent magnet is changed, with the magnetic flux led to the second stator and to the hub and inner ring, whereby the number of winding in the coil is increased.

Abstract: A rolling bearing unit with rotating speed detector comprising an inner ring member with an inner ring raceway and a rotatable outer ring member with an outer ring raceway, a plurality of rolling bodies provided between the inner ring raceway and outer ring raceway, an annular, magnetic tone wheel fitted to the outer ring member, a support ring fitted to the axial end of the inner ring member, an annular sensor supported by the support ring so as to be faced to the tone wheel generally in a circumferential direction, the sensor comprising an annular magnetic pole piece, annular permanent magnet and annular coil, so that one end in magnetic orientation of the permanent magnet is placed adjacent to one end portion of the pole piece, while the other end in magnetic orientation is placed magnetically adjacent to the tone wheel, the coil provided adjacent to the pole piece, the tone wheel having cut-outs formed with a uniform pitch in a circumferential direction and faced across a clearance to a portion of the pol

Abstract: Encoder device for a rotational speed sensor of a rotating member of the bearing (1) mounted on a non-rotating member of the said bearing (1), of the type comprising a sensor (7) which is secured to an element that is fixed relative to the non-rotating member and in front of which an element forming a rotor moves in rotation with a small air gap, which element is equipped with an encoder (12) in the form of a multipole magnetized ring, capable of producing in the sensor a periodic signal of frequency proportional to the speed of rotation of the rotor element. The encoder (12) is fixed to an internal face of a rigid protection and support element (13) made of nonmagnetic metallic material, a corresponding external face of the protection element (13) moving in rotation in front of the sensor (7).

Abstract: A rolling bearing unit with a rotating speed sensor comprising a hub having a flange for mounting a vehicle wheel and an inner ring raceway, an outer ring having a mount portion for supporting a suspension apparatus and an outer ring raceway, a plurality of rolling members between the inner ring raceway and the outer ring raceway, a sensor supported by the outer ring, a tone wheel mounted to the hub so as to be faced to the sensor, an annular support frame having a cylindrical mount portion, a flanged portion and a support portion, the cylindrical mount portion fitted onto the outer ring, the flanged portion bent inwards at right angles at an edge of the mount portion and having a side face, the support portion having a circumferential end face and projected from the side face of the flanged portion, and a conductive member projected from the circumferential end face of the support portion to output signals from the sensor, the circumferential end face of the support portion and part of the flanged portion co

Abstract: The bearing unit with speed sensor of this invention comprises a shaft, inner rings or races which have inner ring raceways formed around its outer circumferential surfaces and which are secured around the shaft, a member that serves as an outer ring or race having outer ring raceways formed in its inner circumferential surface, several rolling bodies that are located between the inner ring raceways and outer ring raceways, the shaft is stationary during operation with the member turning, a tone wheel fastened to the member which turns during operation, a sensor which is supported by the shaft to face the tone wheel, a non-rotating member which is connected to the shaft, and an engaging means for securing connecting shaft to the non-rotating member so as to prevent the sensor from turning in use for long periods of time.

Abstract: A plastic magnet holder is constructed for use with an annular thrust bearing. The plastic magnet holder has an annular plastic magnet which was snapped into the plastic magnet holder. The plastic magnet holder is provided with a recess formed by a surface having a size and shape to permit the plastic magnet holder to be snapped over the annular thrust bearing.

Abstract: A system for supporting a shaft member at one end of a support component, including a bearing inner ring and a bearing outer ring, a row of rolling elements in the space between the rings, characterized in that the bearing outer ring (1,27, 34) has a radially outwardly directed flange (2) which can be fastened to the support component (9), the bearing inner ring (3), (32) having a radially inwardly directed flange 4 which can be fastened to the end surface of the shaft member (11), a cylindrical centering surface (15) on the bearing outer ring (1), (27), (34) for centering guidance in a corresponding bore in the support component (9), a cylindrical centering surface (13) on the bearing inner ring for centering guidance on a corresponding section of the shaft member (11).

Abstract: A bearing fits over the journal of a rail car axle and within an adaptor that is received within a pedestal opening of the side frame of a rail car truck. The bearing includes an outer race in the form of a double cup, an inner race in the form of two cones, and rolling elements in the form of tapered rollers. The cup and cones have raceways, and the tapered rollers are arranged in two rows between the raceways. Seals close the ends of the bearing, establishing dynamic fluid barriers around wear rings that encircle the journal beyond both ends of the bearing. The bearing between its two rows of tapered rollers contains a generator for producing electrical energy.

Abstract: A bearing for a road wheel of a motor vehicle that is equipped with an anti-lock braking system has on the outer surface of its outer race ring two alternative positions for excitor rings. A rebate affording a cylindrical surface and an axial locating shoulder is provided at each of these positions, enabling a single design of bearing to be used in either a drum or disc brake arrangement.

Abstract: An integral variable reluctance sensor and bearing grease seal assembly (sensor assembly) has at least one magnet and an annular wire coil secured at the interior of a housing which seals an annular space between a dynamic inner race and a static outer race. The sensor assembly is characterized by a relatively large flux change and resulting large peak to peak periodic output due to exploitation of the outer race and housing as high permeance flux paths in the sensor magnetic circuit and an additive arrangement of plural magnets. Sensor output signal strength is variable in step with the number of magnets and output variations due to air gap variations are minimized by symmetrical distribution of the same. The sensor assembly is further characterized by a single dynamic seal and no moving parts.

Abstract: An integral variable reluctance sensor and bearing grease seal assembly (sensor assembly) has at least one magnet and an annular wire coil secured at the interior of a housing which seals an annular space between a dynamic inner race and a static outer race. The sensor assembly is characterized by a relatively large flux change and resulting large peak to peak periodic output due to exploitation of the outer race and housing as high permeance flux paths in the sensor magnetic circuit and an additive arrangement of plural magnets. Sensor output signal strength is variable in step with the number of magnets and output variations due to air gap variations are minimized by symmetrical distribution of the same. The sensor assembly is further characterized by a single dynamic seal and no moving parts.

Abstract: A rolling bearing seal assembly with a built-in sensor; the bearing including a first ring rotating in relation to a second ring, and a number of rolling bodies interposed between the first ring and the second ring and housed in a chamber defined between the two rings; and the seal assembly including at least one shielding element for closing the chamber and located facing the chamber and outside the bearing, and at least one sensor housed inside a seat formed inside the shielding element.

Abstract: A rotatable drive mechanism for producing linear motion of an object includes driving and driven members, one of which is elongated, and which act cooperatively through frictional engagement to produce longitudinal motion of the driven member. It also includes a magnetic coupling having at least first and second magnetizable members with mutually facing flat annular surfaces, a set of balls disposed in a generally annular arrangement between those flat surfaces, and magnetic means attracting the magnetizable members to each other. Respective ends of the magnetic coupling are fixedly secured to the driven member and to the object, respectively. Since the elements of the magnetic coupling, in and of themselves, would permit relative rotation of parts, which is undesired, provision is also made for restraining the undesired rotation of any part of the magnetic coupling.

Abstract: An antifriction bearing assembly has rolling elements and a magnetic encoder ring housed in an outer ring with two portions which can have different diameters. A sensor is removably attached to the outer ring in alignment with the encoder ring. Various seal assembly configurations may be used to seal the bearing while accommodating the sensor.

Abstract: A storage vessel maintaining clean environment for storing articles such as semiconductor wafers includes a plurality of receiver fixed to a shaft for horizontal rotation. The receivers support carriers having the articles therein. Both thrust and radial bearings supporting the shaft are of a non-contacting magnetic type. The shaft is driven by a motor with a rotor fixed to the shaft and a stator facing the rotor. The vessel may have a vacuum or be charged with inert gas.

Abstract: A bearing device for a vehicle axle has an outer ring, two connected inner rings and rollers. The outer ring has a mounting flange at the middle in the axial direction on an outside circumference surface thereof and a stepped hole open radially at approximately the middle in the axial direction thereof. A pulser ring is mounted at the middle in the axial direction of the two connected inner rings o outside circumference surfaces of the two connected inner rings. A rotation sensor has a detecting member and a mounting member vertical to the detecting member. The detecting member consists of a small end portion and a large middle portion. The detecting member is inserted in the stepped hole, so that the end portion opposes the pulser ring. A face of the mounting member on a chassis bearing installation member side is positioned near the center line of the middle portion.

Abstract: In a speed sensing bearing unit comprising a fixed ring with a pair of outer ring raceways on its inner peripheral surface, a pair of inner rings with inner ring raceways on their outer peripheral surfaces corresponding to the outer ring raceways, a plurality of rolling bodies provided between the fixed ring and the inner rings, a pulse rotor supported on one of the pair of inner rings, and a sensor supported opposing the outer peripheral surface of the pulse rotor, the pulse rotor comprises a main body of magnetic material having a cage-like cylindrical shape and a plurality of through-apertures formed at circumferentially evenly spaced intervals and an engaging element of a non-magnetic resilient material formed to be fitted into the through-apertures and having hook portions protruding from an inner peripheral surface of the engaging element to engage with grooves formed in the outer peripheral surface of the other of said inner rings.

Abstract: Installed between a housing and a shaft concentrically disposed with a space having a predetermined radial length therebetween so as to move relative to one another is a sealing device which comprises a ferrofluid seal device comprising a permanent magnet and a pair of pole pieces for supporting the magnet interposed therebetween, so that a ferrofluid is retained between the pole pieces at one end thereof and the shaft and that a radially outer air gap is provided at least one of the pole pieces at the other end thereof and the housing, whereby the magnetic flux path extending between the pole pieces at the other end thereof and the housing is eliminated.

Abstract: A ferrofluid seal apparatus comprises magnetic fluid holding or positing means for storing or retaining a magnetic fluid in a sealing arrangement wherein inner and outer elements are relatively rotated. The magnetic fluid holding means includes an arrangement for retaining the magnetic fluid which flows out from its original position.

Abstract: An antifriction bearing for mounting in a housing bore. The antifriction bearing has a groove in one of the peripheral surfaces of the outer race, an annular encoder rotatable with the inner race, a sensor support including an arcuate band having an axially extending lip which matingly engages the groove in the outer race and a sensor removably attached to the sensor support.

Abstract: A rolling bearing arrangement for an anti-locking brake system has a pulse ring with projections directed toward the fixed ring. The surfaces of the projections that activate the pulse generator are cut during the hard working of the bearing ring. The pulse generator is integrated in the rolling bearing arrangement. Thereby, on one hand, tolerance limited operational differences in the amplitude and shape of the pulses are avoided, especially during slow rotational speeds of the bearing ring. Furthermore, external influences on the pulse generator and pulse ring caused by rough roads do not occur due to the hermetic encapsulation of the sensitive components.

Abstract: A bearing system comprised of a base made of a magnetic material. The bearing system is also comprised of an element disposed adjacent the base. The element is comprised of a device for creating a separation force and a positive stiffness between the element and the base such that a gap is formed therebetween. The element is also comprised of a device for generating magnetic flux such that a closed magnetic flux circuit is formed through the element, the base and the gap creating a preload force and a negative stiffness between the element and the base. The positive stiffness is greater than a negative stiffness, and the preload force essentially balances the separation force. In a preferred embodiment, the creating device includes a device for flowing fluid through the element such that a fluid pressure is formed between the element and the base, resulting in the presence of the gap and the positive stiffness.

Abstract: A double row tapered roller bearing, which has the capacity to produce a pulsating electrical signal, the frequency of which reflects angular velocity, includes an outer race having a pair of tapered raceways that are presented inwardly, two cones, each having a tapered raceway that is presented outwardly toward a different raceway of the outer race, and tapered rollers arranged in two rows between the raceways of the outer race and the cones, with the small ends of the tapered rollers in each row being presented toward space between the two rows. The outer race has an oblique bore which opens into the space, whereas one of the cones has an axially directed seat which extends into the space. The oblique bore contains a sensor while the axially directed seat has a target wheel fitted over it, and the target wheel has an oblique operative surface that is presented opposite the inner end of the sensor, there being a slight gap between the two.

Abstract: A guide rail has an axially extending recessed groove opening upwardly to guide a nut block to move rectilinearly along the recessed groove when a ball screw shaft is rotated. A pair of strip-shaped magnets are secured to upper surfaces of both side walls of the guide rail. A flexible seal plate made of steel sheet is fixed to the guide rail with its opposite ends fastened to opposite ends of the guide rail. The seal plate slidably engages a guide recess formed in the upper surface of the nut block and crosses axially over the nut block forming an expanded portion along the outer surface of the nut block. A seal pressing member is attached to the nut block to press the expanded portion of the seal plate downwardly, and also to guide the seal plate towards the belt-shaped magnets at front and rear portions of the expanded portion so that the seal plate is attracted by the magnets at portions located before and behind the expanded portion, i.e., the nut block, to cover the recessed groove of the guide rail.

Abstract: A sensor bearing for the detection of rotational speed and angle torsion of a shaft or hub or axle comprises a bearing having an inner raceway, an outer raceway, and a cage situated between the inner raceway and the outer raceway. A plurality of balls is rotated around halfway between the inner raceway and the outer raceway at a speed proportional to the rotational speed of the shaft or hub or axle. Each of the balls contains a magnet integral thereto. The sensor bearing also comprises a plurality of hall effect sensors spaced along the inner periphery of the outer raceway and at a distance proportional to the spacing of the balls along the raceway such that, as each ball passes one of the Hall effect sensors, an electrical signal is generated.

Abstract: Integrated bearing intended particularly for equipping a motor-vehicle wheel hub, comprising a rotary outer ring (1) and a stationary inner ring (2); at least one row of rolling elements (3) arranged between the outer and inner rings; an annular pulser (4) fixed to the rotary ring (1) in the vicinity of one of its ends; and a sensor (5) stationary relative to the stationary ring (2) and located opposite the pulser so as to be capable of measuring the rotational speed of the outer ring in relation to the inner ring of the bearing, characterized in that it comprises a substantially annular flange (6) delimited by an inner cylindrical rim (6a) fixed to the inner ring (2) and by an outer cylindrical rim (6b) which is coaxial relative to the inner rim and on the outside of which is mounted a sensor carrier (7) equipped with means (16) for fastening a connecting cable (8) connected to the sensor, the flange covering without contact the end of the outer ring (1) where the pulser is fastened and being equipped with a

Abstract: A magnetic fluid seal assembly comprising an annular sealing clearance communicating with an external space, an annular permanent magnet for forming a magnetic field in the sealing clearance, a ferromagnetic fluid retained in the sealing clearance by the magnetic field but rotationally movable in the sealing clearance, and a scattering preventive portion provided axially outwardly of the sealing clearance for preventing the ferromagnetic fluid from scattering to the external space when the ferromagnetic fluid is rotationally moved.

Abstract: A device enabling the revolutionary speed to be measured between two parts in relative rotation such as the supports of a vehicle wheel and in particular between rings of a rolling bearing for the support of a vehicle wheel, including a first shield integral with the rotating ring of the rolling bearing carrying a magnetized ring with a pair of alternate poles, which is placed in front of, in operation, a passive sensor borne by a second shield attached to the fixed ring of the bearing; the sensor is inductive and has n polar pieces in a number proportional to the pairs of alternate poles of the magnetized ring; the configurations of shields and sensor are such that the elements measuring the relative speed are integral with the shields and protected outwards.

Abstract: An improved bearing device for use in a spindle motor for driving computer hard disks is disclosed. The device includes a shaft, bearings supporting the shaft, and a bearing holder for holding the bearings. The bearing holder is made of a magnetic material. The shaft, the bearings, and the bearing holder are made of materials having substantially the same thermal expansion coefficient.

Abstract: A magnetic liquid seal for an anti-friction bearing, the seal comprising an annular magnet and annular pole rings with respective supplies of magnetizable liquid radially between the pole rings and the inner ring. A pre-seal element with a lip extending toward the inner ring is supported on that axial side of the magnet that is toward the rolling element balls. A notch is defined in the inner race radially generally centered beneath the lip. The opposite axial side surfaces of the notch are obliquely outwardly inclined in the radially outward direction.

Abstract: A bearing assembly with a revolution detector for detecting the number of revolutions of a vehicle wheel. It includes a pulse ring made of a ferromagnetic material into a multipolar magnet and fixedly mounted on the outer periphery of the inner ring and a sensor mounted on the outer ring at a position opposite to the pulse ring. The pulse ring has a mounting portion fixed to the inner ring, an uprising portion extending radially and outwardly from one end of the mounting portion, and a flange portion extending from the outer end of the uprising portion in parallel with and opposite to the mounting portion. The flange portion has its outer surface magnetized into a multipolar magnet.