| 摘要 |
The invention provides a container closure assembly for storing fluids under pressure, said assembly comprising: a container neck (10); a closure (12) for said neck; a first screw thread (14) on one of said neck and closure; a second screw thread (16) on another of said neck and closure; said second screw thread being engageable with said first screw thread; means (13) for forming a seal between said neck and closure when said closure is screwed down on said neck; mutually engageable elements (34, 38) on said neck and closure to block or restrict rotation of said closure in an unscrewing direction beyond an intermediate position when said closure is under an axial pressure in a direction emerging from said container neck; wherein said neck and closure are constructed and arranged to provide a vent for venting fluid from said container neck at least when said closure is in said intermediate position.
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