| 摘要 |
A connecting link intended for transferring gaseous, powderous or liquid medium, even under pressure, between two connecting points movable relative to each other. The connecting link is of the type comprising a tubular member with connecting pieces (2,3) located at its ends for connecting the link to said points, and at least one ball joint (22) located in connection to one of the connecting pieces (2,3) and comprising a ball (23) supported in a seat, which ball (23) includes a through channel (27,42,43). This ball (23) is sealed in its seat by two parallel and spaced sealing arrangements (28) on both sides of one end of the through channel (27,42,43) of the ball, (23) which channel extends angularly through the same, and is exposed to the same pressure on its surfaces located between the sealing arrangements, whereby the ball (23) is maintained balanced in its seat irrespective of the pressure prevailing in the link. |
