A joint is described which has a pair of coaxially aligned elastic rings (5) of truncated conical form the respective vertices of which are directed in opposite ways and are engaged each between a central core (3) externally exhibiting an attachment surface (3a) of truncated conical form and an outer collar (4) internally exhibiting an attachment surface (4a) of truncated conical form converging towards a vertex (V) which is common to the converging vertex of the attachment surface (3a) of the core (3). Each elastic ring (5) comprises an inner layer made of elastomeric material (10) and an outer layer (11) made of elastomeric material between which a laminar insert piece of truncated conical form (12) is inserted, the inner (12a) and outer (12b) surfaces of which converge towards the common vertex (V) of the attachment surfaces (3a, 4a). The outer elastomeric layer (11) is greater in thickness that the inner elastomeric layer (10). The described joint (1) has an improved fatigue limit. <IMAGE>
