Swivel joint comprise inner ring with spherical outer surface and outer ring with similar inner surface whose outer surface has profiles with less slope than remainder of surface

摘要

The swivel joint comprise an inner ring (1) with a spherical outer surface (2) and an outer ring (4) with a similar inner surface. The outer surface of the outer ring has profiles (5.1) with less slope than the remainder of the surface. An independent claim is included for a releasable mounting for the joint.