| 摘要 |
<p>A container for pressurized fluids has a cylindrical side wall which is closed at one end by an internally concave bottom wall. A pressure relief device for the container comprises an externally protruding cup-shaped impression in the container bottom wall. The impression has a circular wall which is joined at one end to the container bottom wall and which is closed at the opposite end by a first base portion. A tab is located in the base portion. The tab is partially circumscribed by a line of reduced material thickness along which the base portion separates in response to over-pressurization of the container contents, thus freeing the tab for outward deflection to provide an outlet through which the contents may escape. A separate cup-shaped insert has a circular wall forcibly received within the circular wall of the cup-shaped impression. The insert is dimensioned to radially stress the base portion of the cup-shaped impression in tension.</p> |
