| 摘要 |
A supply pipe ( 1 ) for connecting an instrument for dental or surgical use to a control and supply unit contains fluid conduits and electric lines and includes at a front end a universal coupling ( 4 ) for connecting different types of said instrument in a removable manner to part or all of said conduits and lines. The universal coupling includes fluid connectors ( 6 to 9 ) coupled to said conduits and electric connectors ( 20 to 23 ) coupled to said lines, each of said connectors occupying a place on a front face ( 11 ) of the universal coupling. The supply pipe ( 1 ) contains at least on additional electric line including an additional conductor ( 24 ) which is not coupled to one of said electric connectors ( 20 to 23 ), but to one ( 7 ) of the fluid connectors of the universal coupling ( 4 ), said dual function connector being arranged to provide a choice between a fluid connection, an electric connection or both. The additional conductor ( 24 ) can be inside or outside the flexible tube ( 17 ) forming the fluid conduit, or even in the wall of said tube.
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