| 摘要 |
PCT No. PCT/FR97/01036 Sec. 371 Date Dec. 14, 1998 Sec. 102(e) Date Dec. 14, 1998 PCT Filed Jun. 11, 1997 PCT Pub. No. WO97/47531 PCT Pub. Date Dec. 18, 1997The container stopper comprises a cylindrical part to be engaged in the neck of a container and has a groove which extends peripherally on at least one part of the cylindrical part circumference. Two channels separated from each other, extend in the cylindrical part of the stopper and open into the groove through orifices respectively spaced from each other in the groove peripheral direction. A diaphragm of elastomeric material closely matches the shape of the cylindrical part and the groove surface covering the orifices of the two channels. The diaphragm forms a shut-off valve that by its elastic deformation, allows a fluid substance contained in the container to flow from inside the container outwards, as well as from outside into the said container.
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