Abstract: A transmission joint consists of two drive shafts connected by an articulated mechanical connection. This connection is protected by an elastic socket, such as a sealing bellows, connecting the shafts. One end of this socket is multilobed to cover upon contact a multilobed element of the articulated mechanical connection and works with a tightening element of the collar type that surrounds the multilobed end of the socket. The multilobed end of the protective socket has, to the right of the zones of greater thickness of the multilobed wall, a reinforcement of the thickness to obtain an external radial bulge of the wall of the socket, at least when mounted on the multilobed connection element. The bulge works with the collar type tightening element to balance the tightening forces between the thin and reinforced portions of the multilobed wall.

Abstract: The invention relates to a multilobed socket (5) for protection of a vehicle transmission between a drive shaft and a transmission bell, whereby said socket (5) comes in the form of a cylindrical-conical bellows (8) that extends between the large multilobed base (6) and the small base (7) of the socket (5). This socket is characterized in that it has a new type of architecture close to the large multilobed base (6) of said socket (5), whereby this architecture consists in eliminating, in the pressure area zone of the socket (5) on the bell, any means of axial immobilization in said pressure area for the purpose of allowing free translation of the socket (5) in the direction of slippage, whereby a tightening collar is provided on the external face of said pressure area to exert a radial pressure for immobilization of the socket (5) against the receiving bell, whereby this radial pressure causes, to the right of the collar, a reduction of the thickness of the pressure area zone.

Abstract: A transmission joint consists of two drive shafts connected by an articulated mechanical connection. This connection is protected by an elastic socket, such as a sealing bellows, connecting the shafts. One end of this socket is multilobed to cover upon contact a multilobed element of the articulated mechanical connection and works with a tightening element of the collar type that surrounds the multilobed end of the socket. The multilobed end of the protective socket has, to the right of the zones of greater thickness of the multilobed wall, a reinforcement of the thickness to obtain an external radial bulge of the wall of the socket, at least when mounted on the multilobed connection element. The bulge works with the collar type tightening element to balance the tightening forces between the thin and reinforced portions of the multilobed wall.