| 摘要 |
<p>A self-closing extraction mouthpiece comprises a valve housing (1) having an axially through-going bore which at one portion is surrounded by an annular, preferably conical valve seat (8), where in said bore is disposed a movable extraction pipe (5) having an annular sealing portion. In a first position of the extraction pipe (5), this portion is adapted to rest sealingly against the valve seat (8) as well as being kept in this sealing rest position by means of a screw spring (4), acting between the valve housing (1) and the extraction pipe (5), e.g. through a pressure cover (3) attached to the extraction pipe (5). The extraction pipe (5) has a closed inner end and a laterally directed hole (2) through the pipe wall. This hole (2) will be located above the valve seat (8) and prevent liquid passage through the extraction pipe (5) when the latter occupies the closing position, resting sealingly against the valve seat (8), while movement of the extraction pipe (5) away from this closing position, brings it into a second position wherein the laterally directed hole (2) will be located below the valve seat (8), communicating with liquid within a liquid container to which the extraction mouthpiece is assigned. This extraction mouthpiece distinguishes itself through external closing means (6) on the valve housing neck. The closing means (6) are adapted to prevent unintentional movement of the extraction pipe (5) away from the closing position wherein it rests sealingly against the valve seat (8) with the sealing portion thereof.</p> |
