Abstract: A constant velocity joint adapted to transmit rotary motion from a driving shaft to a driven shaft at the same angular velocity comprises, for example, an outer joint member 10 associated with the driving shaft 1, an inner joint member 20 associated with the driven shaft 2 and a plurality of ball elements 3 interposed between these joint members with a cage member therebetween. The inner member 20 has an outer spherical surface 22, and a plurality of circumferentially distributed ball grooves 21 each having its groove bottom drawing a curved or arcuate line whose curvature center is located at a point B axially apart from the curvature center 0 of the outer spherical surface as viewed in axial section. The inner member is formed through two steps of forming works consisting of a first step for providing the ball grooves and the outer peripheral surface finished to the respective shapes as desired with respect to substantially a half l.sub.

Abstract: A constant velocity joint for connecting two revolving shafts with each other and transmitting rotary motion from one to the other comprising an inner joint member and an outer joint member associated with the two shafts respectively, a plurality of ball elements interposed between the inner and outer members for transmitting torque from one to the other, and a cage member arranged between the inner and outer members for holding the ball elements in position, wherein one or both of the inner and outer joint members, e.g.

Abstract: A rotary bearing assembly which comprises a cup-like cylindrical cell member A, a shaft member G having an end adapted to engage with the bottom of the cylindrical cell member to support thrust loads applied from the outside and a groove for receiving a ring F which supports thrust loads applied from the inside, a bearing member B fitted between the shaft member and the cylindrical cell member, a two-piece split sleeve C interposed between the shaft member and the cylindrical cell member, the split sleeve being injection-molded or pressed into a desired shape, a two-piece split sealing element E, and an annular slipping-off-preventive member D which also serves for sealing purposes, there being formed in the interior a lubricating oil reservoir LC and a sealing chamber SC.

Abstract: A bobbin hanger provided with self-aligning means comprising an upper member of the joint type fixed to or swingably suspended from a hanger rail, a lower member having engageable members in the form of horizontally and radially disposed balls engageable with the top bore shoulder of a bobbin, and an intermediate member of the pivot type disposed between the upper and lower members and adapted to perform a self-aligning function, said bobbin hanger being designed and assembled in such a manner as to establish a free joint condition and a centripetal condition and provide the necessary particular braking force.