| 摘要 |
Valve closure device intended to be fitted by attachment means on a container in order to close the said container and comprising a valve, the said valve being coupled with elastic return means pushing the said valve towards its closed position and adapted to cooperate with a seat carried by the container; the elastic return means consist of the non-contiguous turns (7) of a spring (5) and the attachment means are formed by the contiguous attachment turns (6) and the valve is formed by contiguous closing turns (8) in the form of a closed spiral, the contiguous attachment turns (6) and the contiguous closure turns (8) being part of the said spring (5). <IMAGE>
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