A ball joint has a ball stud, a housing and a ball seat (seat). The seat is an elastic body in a tubular shape with the top and the bottom being open, and has a spherical space to accommodate a ball portion. The housing has a spherical inner face that is close to an outer periphery of the ball portion, to accommodate the ball portion in the inner face via the seat so as to support the ball stud. A clamped portion arranged at a peripheral end of the housing is clamped to press the seat so that the ball stud can be swung and rotated.

A drive device comprises at least one tubular linear motor (M1; M1; M2) which has a cylindrical armature (20; 120) and a tubular stator (10) with a cylindrical magnetic yoke (11) and a through-hole (13) coaxial with the magnetic yoke (11). Electric drive coils (12; 112) are arranged in the magnetic yoke (11). The armature (20; 120) has a non-magnetic armature tube (21) in which permanent magnets (23) are arranged. The armature (20; 120) extends coaxially through the through-hole (13) and is mounted so as to be movable in its longitudinal direction relative to the stator (10). The drive device comprises linear ball bearings (15; 115), and the armature (20; 120) of the tubular linear motor (M1; M1; M2) is mounted in the linear ball bearings (15; 115).

Multi-layer composites and methods of using the composites as a membrane for electroacoustic transducers. The composites and methods comprise at least one first and one second outer layer, wherein at least one of the cover layers being made from a polypropylene sulfide-plastic having a halogen content not exceeding 550 ppm.

The present invention achieves a high mechanical load capacity of a rod end by means of a component loop that passes around a bearing, where the component may be made of continuous-fiber reinforced composite material with thermoplastic matrix and where the continuous-fiber reinforced composite material with thermoplastic matrix may extend into a threaded stem of the rod end, and the component made of continuous-fiber reinforced composite material with thermoplastic matrix may be enclosed by short-fiber reinforced, long-fiber reinforced, or unreinforced thermoplastic. The threaded stem can be implemented with an external or an internal thread.

A synthetic resin rolling bearing retainer is to be arranged between an inner ring and an outer ring of a rolling bearing. A plurality of guided portions protruding radially outward from an outer diameter surface of the retainer is provided along a circumferential direction of the outer diameter surface. Each of the guided portions has a guide surface protruding to be in sliding contact with the outer ring, a chamfered portion formed at an edge portion of the guide surface, and a groove portion formed at a portion of the guide surface in an axial direction. The guide surface and the chamfered portion have surface properties where an arithmetic average roughness Ra is 1.0 to 9.8 m and a maximum height Rt is 10.1 to 102.9 m. A parting line is provided radially inside the guide surface.

A synthetic resin retainer includes two annular members having opposed surfaces opposed to each other and each formed with a plurality of pockets which are circumferentially spaced apart from each other, and in which the balls are received. Each annular member includes axially concave, arc-shaped pocket wall portions defining the inner surfaces of the pockets, and flat plate-shaped coupling plate portions coupling together the adjacent pairs of the pocket wall portions. The coupling plate portions have axial thicknesses of 30% or less of the diameters of the balls, and the pocket wall portions have, at deepest points of the pockets, thicknesses of 10% or less of the diameters of the balls.

A roller bearing includes an inner ring having an inner-ring raceway surface on an outer periphery of the inner ring, an outer ring arranged concentric with and peripherally outside the inner ring and having, on an inner periphery of the outer ring, an outer-ring raceway surface that faces the inner-ring raceway surface, a plurality of rollers interposed between the inner-ring raceway surface and the outer-ring raceway surface in a rollable manner, and a cage that holds the rollers at predetermined intervals along a circumferential direction. Opposite end portions of the outer-ring raceway surface in an axial direction serve as guide surfaces or which rotation of the cage is guided. Or an outer periphery of the cage, slidable contact surfaces are formed which slidably contact the guide surfaces and which are arranged to face the respective guide surfaces across a labyrinth clearance.

A thrust bearing is described comprising first and second bearing assemblies (15, 17) rotatable relative to each and a plurality of axially arranged bearing stages (14a, 14b) formed between the first and second bearing assemblies (15, 17). Each bearing stage comprises a first load shoulder (16) provided on the first bearing assembly (15), a second load shoulder (18) provided on the second bearing assembly (17), a bearing structure (30) defined between the first and second load shoulders; and an extrudable component (32) forming part of the bearing structure. Wherein axial load applied between the first and second bearing assemblies (15, 17) in a first relative axial direction is transmitted between respective pairs of first and second load shoulders via the extrudable components (32) of respective bearing structures (30). The extrudable components (30) provide for load balancing between each bearing stage (14a, 14b).

A sliding member includes a sliding layer including graphite particles dispersed in a synthetic resin matrix. The graphite particles have a volume ratio of 5% to 50% and are composed of spheroidal particles and flake-like particles, respectively having a graphitization degree K1 and K2. The flake-like particles have a volume ratio of 10 to 40% with respect to a total volume of the graphite particles. The spheroidal particles have a cross-sectional structure with AB planes of a graphite crystal laminated from a surface toward a center. The flake-like particles have a cross-sectional structure with the AB planes laminated in a thickness direction. The spheroidal particles and the flake-like particles have an average particle size of 3 to 50 and 1 to 25 m respectively. K1 is 0.80 to 0.97 and K2 is greater than K1, and a difference K2 K1 is 0.03 to 0.15.

A rolling bearing with a rotation sensor includes an inner race and an outer race, one of which is a rotating race and the other of which is a stationary race. An annular magnetic encoder alternately magnetized in opposite polarities in its circumferential direction is mounted on the rotating race. A magnetic sensor configured to detect the changes in magnetic flux when the magnetic encoder is rotated is mounted in a resin sensor housing mounted on the stationary race. The sensor housing is made of a resin material including a resin composition containing polyphenylene sulfide, an inorganic filler, and glass fiber.