| 摘要 |
Disclosed is a closure means for a pressure vessel, said pressure vessel comprising a body portion and a lid portion, the closure means comprising: securing means attached to the lid portion for releasably securing the body and lid portions together to form a subtantially gas-tight enclosure, the securing means permitting a limited degree of movement between the body and lid portions from a sealing position to a venting position when the pressure within the vessel exceeds the external pressure by a predetermined amount thereby permitting venting of excess pressure, the closure means comprising biasing means actin g to bias movement of the body and lid portions from the venting position to the seali ng position after venting of excess pressure, and pressure vessels comprising said closure means.
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