| 摘要 |
A universal or ball pivot-link chain composed of chain link elements, each such link element possessing at one end a swivel or ball pivot body mounted at the other end of the directly neighboring chain link element. The swivel or ball pivot body comprises two concentric spherical bearing surfaces possessing different radii of curvature, the bearing surface with the smaller radius of curvature being located forwardly of the bearing surface with the largest radius of curvature in the direction of such neighboring link element. |
