| 摘要 |
<p>The invention relates to a self-closing valve arrangement for use in the dispensing opening of a container, a closing cap or the like. Said valve arrangement comprises a first closing element (7) having a concave wall part (11) consisting of elastic material, and a through opening (14) formed in said wall. The wall part can be elastically deformed from a closing position to a releasing position when a first differential pressure force is applied to the surfaces opposite to the wall part by squeezing them. The valve arrangement is also provided with a second closing element (8) having a concave wall part (12) for sealing the through opening when the first closing element is in the closing position. The second closing element (8) can be released from its sealing alignment with the through opening (14) of the first closing element (7) in order to compensate the pressure in a container provided with the valve arrangement when the container is no longer subject to a pressure-increasing squeezing force. In order to achieve said pressure compensation, a second differential pressure force which is directed against the first differential pressure force and which acts by squeezing the opposite surfaces is applied.</p> |
