DREHKUPPLUNG

A swivel joint for interconnecting two lengths of pipe, comprises an inner annular member (1) adapted, in use, to be connected to a first length of pipe and an outer annular member (2) co-axial with the inner annular member (1) and adapted, in use, to be connected to a second length of pipe, bearing means (3, 4, 22, 23) locating the inner and outer members (1, 2) for relative rotary movement with respect to one another. A lubricant reservoir (40) is connected to the bearing means (3, 4, 22, 23), and pump means (29, 42) driven by relative rotary movement between the inner and outer annular members (1, 2) pumps lubricant from the lubricant reservoir (40) to the bearing means (3, 4, 22, 23). The lubricant reservoir (40) comprises a collapsible hose, and the pump means (42) comprises means for effecting a peristaltic action in the hose (40) as a result of relative rotary movement of the inner and outer annular members (1, 2), thereby causing lubricant to be displaced from the hose (40) towards the bearing means (3, 4, 22, 23).