Abstract: A rotary member as a one way clutch including an outer ring formed in its inner periphery with axial grooves each formed on its bottom with a cam surface tapered in one of the opposite directions of rotation, an outer member fixedly mounted on the outer ring and having an end wall for closing one end of the grooves, rolling elements received in the grooves and a closure member adapted to close the other end of the grooves and integrally provided on its inner surface with positioning members and biasing members adapted to be received in the grooves. The positioning members serve to hold the closure member in a fixed position relative to the outer ring. The biasing members serve to bias the rolling elements into narrower side of the cam surfaces. The grooves may have their bottom recessed to receive the positioning members therein. The closure member will thus be positively prevented from turning relative to the outer ring.

Abstract: A wheel bearing assembly for an automotive wheel equipped with a detector for the number of revolutions of a wheel hub. It has an outer member and two inner members mounted in the outer member through rolling elements. A pulse ring in the form of a multipolar magnet is mounted in the bearing assembly so as to be fixedly held in annular grooves formed in the outer periphery of the inner members at their abutting ends or to be supported on one of the inner members. A sensor including a Hall IC is mounted in the outer member at such a position as to face the pulse ring. The pulse ring rotates with the inner members to allow the sensor to detect the rotational speed of the wheel.

Abstract: An autotensioner includes a cylinder having its bottom closed and filled with a hydraulic oil and air, an oil seal mounted in the cylinder to seal the hydraulic oil and air, a rod slidably extending through the oil seal, and a piston slidably mounted in the cylinder with its top end abutting the bottom of the rod. The interior of the cylinder is separated into an upper reservoir chamber and a lower pressure chamber by the piston. Both chambers communicate with each other through a channel formed in the piston. The rod is biased by a spring mounted in the reservoir chamber in such a direction as to protrude from the cylinder. A check valve is provided in the pressure chamber near the bottom of the piston to open the channel in the piston only when the pressure in the pressure chamber is lower than the pressure in the reservoir chamber. The cylinder may have an outer casing and an inner sleeve so that the piston can slide on the inner surface of the sleeve.

Abstract: An autotensioner for adjusting the tension of a timing belt used with an automotive engine. It includes a cylinder case filled with a hydraulic oil, a piston partitioning the interior of the cylinder case into a pressure chamber and a reservoir chamber and a push rod having its bottom end coupled to the piston and the top end adapted to protrude from the cylinder case. A spring is provided to bias the piston and the push rod upwardly. The pressure chamber communicates with the reservoir chamber through a channel formed through the piston. A plate-shaped check valve is provided in the pressure chamber to open and close the bottom of the channel. The plate-shaped valve can respond quickly to the fluctuation of pressure in the pressure chamber because of its reduced mass.

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.

Abstract: A sealed double row spherical roller bearing assembly, having a bearing, with an outer race providing two spaced-apart outer roller tracks, and defining in section an arc of a sphere, an inner race defining two parallel spaced-apart inner roller tracks, each defining in section an arc of a sphere, a plurality of rollers located in respective inner and outer tracks, each of the rollers defining in section an arc of a sphere corresponding to the arcs of respective inner and outer tracks, seal retaining shoulders formed on one race, seal engaging surfaces formed on the other race, two annular flexible seals supported on respective seal retaining shoulders, and extending into engagement with respective seal engaging surfaces, and a bearing housing receiving the bearing, the housing being open at both ends.Also disclosed is a bearing housing having retaining means for retaining a bearing in at least two positions.

Abstract: A belt autotensioner for giving a desired tension to a belt. It includes a tension pulley pressed against the belt, an eccentric shaft extending through the tension pulley to rotatably support it and formed with a hole arranged eccentrically from the axis of the tension pulley, an actuator having a cylinder and a push rod silidably mounted in the cylinder and having its one end protruding from the cylinder and butting a projection fixed to the eccentric shaft, a bolt extending through the hole in the eccentric shaft and the cylinder of the actuator to pivotally support the eccentric shaft and a spring for biasing the eccentric shaft to pivot it in such a direction as to increase the tension of the belt. The spring may be a torsion coil spring mounted around the eccentric shaft with its one end fixed to the outer periphery of the eccentric shaft and the other end fixed to the cylinder of the actuator.

Abstract: A clutch having an outer member, an inner member mounted in the outer member, a cage interposed between the outer and inner members and cam elements movably mounted in pockets formed in the cage. Torque-setting elastic members are provided between the cage and one of the inner and outer members so that while the torque on the elastic member is smaller than a preset value, they will rotate in unison with some clearance left therebetween in the direction of rotation. When the torque on the elastic member gets larger than the preset value, the elastic member deforms to allow the cage to turn relative to the member engaged therewith. Now, the cam elements are pushed by the cage into engagement with both cam surfaces formed on the inner periphery of the outer member and the outer periphery of the inner member, thus brining the two members into engagement.

Abstract: A roller element for use in a roller bearing having a surface formed with minute recesses at random so that the ratio RMS(L)/RMS(C) will be not more than 0.8 wherein RMS(L) is the roughness mean square value in the longitudinal direction and RMS(C) is the roughness mean square value in the circumferential direction and so that the SK value is not more than -0.2 in both the longitudinal and circumferential directions.

Abstract: A wheel bearing assembly for an automotive wheel equipped with a detector for the number of revolutions of a wheel hub. It has an outer member and two inner members mounted in the outer member through rolling elements. A pulse ring in the form of a multipolar magnet is mounted in the bearing assembly so as to be fixedly held in annular grooves formed in the outer periphery of the inner members at their abutting ends or to be supported on one of the inner members. A sensor including a Hall IC is mounted in the outer member at such a position as to face the pulse ring. The pulse ring rotates with the inner members to allow the sensor to detect the rotational speed of the wheel.

Abstract: An auto-tensioner for a belt has a cylindrical body having a bottom. A nut formed with female threads on its inner periphery and having a rod integrally formed at one end is slidably mounted in the body. A bolt is mounted in the body so that its male threads will engage the female threads on the nut. A belt loading spring is mounted between the nut and the bottom of the body to urge the nut in such a direction as to increase the tension to the belt. A bolt turning spring is mounted between the nut and the bolt to urge and turn the bolt in such a direction as to be pressed against the bottom of the body or in a direction away from the nut. Thus the nut and the bolt are moved either toward or away from each other according to the load from the belt which acts on the rod so as to automatically adjust the tension to the belt.

Abstract: In a conductive rolling bearing comprising an inner ring (11), an outer ring (12), a plurality of rolling elements (13) mounted between the inner ring and the outer ring, and seal members for sealing the space between the inner ring and the outer ring, the seal members have one end thereof secured to one of the inner ring and the outer ring and the other end thereof in an elastic, sliding contact with a seal wall surface (18) formed on the other. The free end (19) of the seal member (15) is bent outwardly of the bearing and the seal member (15) is in a sliding contact with the seal wall surface (18) on its bent portion (20). This arrangement gives the effects of providing a low, stable torque for the bearing and of improving the seal performance of the bearing. This conductive rolling bearing is used in a steering assembly of an automobile and bearing assemblies having a bearing near electrical devices.

Abstract: An improved clutch for use with an electric power steering assembly is disclosed. The improved clutch has an outer member, and a cage mounted between the outer and inner members and formed with a plurality of pockets. The improved clutch further comprises a pair of rolling elements mounted in each pocket, and a spring mounted between the rolling elements so as to bias the rolling elements away from each other into wedge-like spaces in the pocket. In the event that an associated driving system fails, the improved clutch of this invention is disconnected from the steering wheel since the outer member coupled to the driving system becomes unlocked from the inner member which is coupled to the steering wheel.

Abstract: An annular oil filter for covering an open end of a rolling bearing has its outer edge held between two annular retainer plates, the outer edges of which are held by a rubber mold to unite them into one body. The rubber mold is resiliently received in an annular groove formed in the inner wall of an outer ring at its end. The oil filter has its inner edge in contact with a shoulder formed on the outer wall of an inner ring.

Abstract: Improved greases for use in homokinetic joints are proposed which comprise a base oil, a thickening agent, and an organic molybdenum compound. Greases comprising a base oil, a thickening agent, an organic molybdenum compound, and an organic zinc compound are also proposed. These greases exhibit smaller friction coefficients than conventional greases used for this purpose. On the homokinetic joint lubricated with the grease according to the present invention, the axial force produced is reduced and vibrations generated on the engine are absorbed. The vehicle is prevented from vibrating. The use of an expensive organic metallic extreme-pressure additive is unnecessary.

Abstract: A homokinetic tripod type universal joint including a tripod member having three trunnions, with a roller rotatably mounted on each trunnion is mounted in an outer member. The roller consists of an inside ring and an outside ring wherein contact is established between a spherical outer periphery of the inside ring and a cylindrical inner periphery of the outside ring. The outside ring is guided in a direction parallel with the axis of the outer member by guide surfaces provided internally of grooves formed on the outer member. This arrangement helps to reduce sliding resistance, temperature rise and vibrations due to induced thrust.

Abstract: A slidable-type homokinetic tripod joint includes an outer member formed with track grooves, a tripod member having three trunnions and mounted in the outer member with the trunnions on the tripod member received in the track grooves in the outer member, and a spherical roller rotatably mounted on each trunnion. Each track groove is formed at each side with a guide surface for the spherical roller. The spherical roller is kept in contact with the roller guide surface at two points. This decreases unbalanced load and the turning moment acting on the spherical roller and decreases the friction force causing vibration.

Abstract: A tripod type homokinetic universal joint which has a tripod member formed with three trunnions, an outer member formed with three track grooves to receive the trunnions, and a cylindrical roller mounted on each trunnion. Each track groove has a pair of roller guide surfaces which are flat and parallel to a plane including the axis of the outer member and the center of the track groove. A ring is interposed between each cylindrical roller and each trunnion and is supported so as to be turnable around an axis which is perpendicular to the axis of the trunnion and parallel to the axis of the tripod member.

Abstract: An improved thrust roller bearing assembly is proposed which comprises a thrust roller bearing and an annular shim. According to this invention, the shim can be coupled with the thrust roller bearing beforehand. This simplifies the assembly of related members. Engaging means provided on the cylindrical portion of the outer race or the inner race or on the shim assures a stable coupling of the shim with the thrust roller bearing.

Abstract: An improved thrust roller bearing assembly is proposed which comprises a thrust roller bearing and an annular shim. According to this invention, the shim can be coupled with the thrust roller bearing beforehand. This simplifies the assembly of related members. Engaging means provided on the cylindrical portion of the outer race or the inner race or on the shim assures a stable coupling of the shim with the thrust roller bearing.