| 摘要 |
A pipe coupling has two body parts (1) and (2). One or both comprise a tubular portion having an end (6) onto which a pipe can be engaged and an external screw thread (8) around a part of each tubular portion, to receive a pipe nut (9) which by rotation can be moved onto the exterior of a pipe (5) engaged on the end of the coupling to clamp the pipe. There is a ball and socket joint (11, 12) between the two body parts (1, 2) of the coupling and a centre nut (10) captive around and against one of the body parts and screwed partly onto the other body part to hold the two together, so that the two body parts can swivel relative to one another. The ball (12) of the ball and socket joint may comprise an annular flap (13) integral with and around the ball and an annular undercut beneath the flap, which form a fluid tight seal against the socket of the other body part. <IMAGE> |
