Abstract: A hub unit with rotation speed sensor comprising;a stationary outer ring member having an outer raceway formed thereon, a rotatable hub having an axially inner end with a male thread portion formed thereon,a inner ring member having an inner raceway formed thereon, and fittingly fixed onto the hub, a nut screwed on the male thread portion of the hub to axially retain the inner ring, a plurality of rolling members located between the outer raceway and the inner raceway, a cover fittingly fixed to the outer ring member at its opening end portion, an annular sensor supported by the cover so as to be located radially between the nut and the cover, a rotatable tone wheel made of magnetic material and fittingly fixed onto the inner ring, the sensor comprising an annular permanent magnet, a magnetic stator and a coil, so that the sensor is opposed generally circumferentially to part of the tone wheel with a small clearance therebetween.

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 rolling bearing unit comprises outer and inner ring members, a cover having an open and portion fitted to the outer ring member and a rotational speed sensor which is mounted in the cover to detect the rotation of the inner ring member, such that the cover can be removed from the outer ring member without causing any damage on the associated components, by applying a tool to the open end portion of the cover at a recess on the outer ring member faced to the open end portion of the cover.

Abstract: A pack seal apparatus formed with a first rigid ring having a radial leg portion and an axial leg portion in an L-shaped cross section, a second rigid ring having a radial leg portion and an axial leg portion in an L-shaped cross section, the first and second rings being coaxially arranged to be rotatable with respect to each other, a first elastic annular seal member secured to the radial leg portion of the first ring so as to be sealingly and slidingly engaged with the axial leg portion of the second ring, a second elastic annular seal member secured to the radial leg portion of the second ring so as to be sealingly and slidingly engaged with the axial leg portion of the first ring; the axial and radial leg portions of the first ring, the axial and radial leg portions of the second ring, and the first and second elastic annular seal members cooperating to define a closed annular space, and a pulser ring made of a separate thin metal plate mounted on the radial leg portion of one of the first and second ring

Abstract: A rolling bearing unit for sensing rotational speed comprising a rotating inner ring member of a magnetic material with an inner raceway, a stationary outer ring member with an outer raceway to oppose the inner raceway, a plurality of rolling bodies between the inner raceway and the outer raceway so that the inner ring member is rotatable freely relative to the outer ring member, a pulse rotor attached to the rotating inner ring member so as to rotate in a coaxial relationship with the rotating inner ring member during use, a sensor supported on the stationary outer ring member so as to face the pulse rotor and comprising a pole piece of magnetic material facing the pulse rotor, a coil wound around the pole piece, a permanent magnet axially in contact with the pole piece, and a back yoke of a magnetic material with a base end portion axially in contact with the permanent magnet and a tip end portion in proximity to the rotating inner ring.

Abstract: A bearing having a passive pulser ring which is provided axially adjacent to the frame substantially L-shaped in cross section, specifically the radially extending flange support section, and the cylindrical support section is provided between the outer and inner rings to provide precise parallelism and axial positioning.

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: An autotensioner which is designed to apply appropriate tension to a timing belt of an engine or a belt that drives auxiliary machinery, for example, an alternator, compressor, etc. The autotensioner has an annular space that is partitioned into two chambers by a first partition wall which is provided on a fixed member and a second partition wall which is provided on a pivoting member, the annular space being filled with a viscous fluid. The first partition wall is formed with a passage which provides communication between the two chambers, and a check valve is provided in the passage. The check valve closes the passage when the tension in the belt increases suddenly, to resist the pivotal movement of the tensioner in one rotational direction, thereby enabling the tensioner to follow slowly and effectively the movement of the belt in which the tension is suddenly increased.

Abstract: The belt tentioner includes a solid damping device between the pivotal member and the fixed member, and the amount of deformation of the solid damping device and that of a spring are adapted to be set independently of each other.This permits the vibration damping operation by the solid damping device and the tensioning operation by the spring to be performed under the respective optimum conditions.

Abstract: A bearing unit has a sensor for sensing rotating speed of a wheel. A concave or a convex portion is formed on an end surface of a wheel shaft rotating with a rotating inner ring member. A disk-like sensor rotor forms on its center a convex or a concave portion which is fit to said concave or convex portion of the wheel shaft.A sensor is attached to a lid body covering an end portion opening of an outer ring member. Install length of the sensor rotor becomes small so that the length of the entire bearing unit becomes small.

Abstract: In a shell type race for a thrust roller bearing comprising at least a planar race wall on which rollers may roll, and an axially extending, cyclindrical wall adapted to be inserted and located in a housing, the outer surface of the cylindrical wall has a plurality of resilient tongues projecting outwardly so as to be open toward the race wall.