| 摘要 |
<p>The invention relates to a combination of a coupling head having a dust-protection peg, the coupling head having an inner chamber. A pair of connections are connected to this chamber, one of which is the compressed-air inlet. A sealing element is accommodated in one of the inlets. Furthermore, a dust-protection peg is guided in the chamber in a moving manner and can be moved into the sealing element and away from it in order to open or close the one inlet. Arranged in the coupling head are spring means which load the dust-protection peg in the direction of its closed position. The dust-protection peg has a surface which is connected to the compressed-air inlet so that, in the event of compressed air being present in this inlet, said compressed air passes to the surface and displaces the dust-protection peg against the force of the spring and away from the sealing element into its open position.</p> |
