초록 ▼

A pressure relief device is disclosed for a container having a cylindrical side wall which is closed at one end by an internally concave bottom wall. The device comprises an externally protruding first cup formed as an impression in the container bottom wall. The first cup has a first circular wall

A pressure relief device is disclosed for a container having a cylindrical side wall which is closed at one end by an internally concave bottom wall. The device comprises an externally protruding first cup formed as an impression in the container bottom wall. The first cup has a first 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 member is located in the first base portion. The tab member is partially circumscribed by a line of reduced material thickness along which the first base portion is adapted to separate in response to an overpressurization of the container contents, thus freeing the tab member for outward deflection to provide an outlet through which the contents may escape. A second element having a second circular wall is forcibly received within the first circular wall of the first cup. The second circular wall is dimensioned to coact with the first circular wall to radially stress the first base portion in tension.

대표청구항 ▼

A pressure relief device for a container having a cylindrical side wall which is closed at one end by an internally concave bottom wall, said device comprising: an externally protruding first cup formed as an impression in said bottom wall, said first cup having a first circular wall joined at one e

A pressure relief device for a container having a cylindrical side wall which is closed at one end by an internally concave bottom wall, said device comprising: an externally protruding first cup formed as an impression in said bottom wall, said first cup having a first circular wall joined at one end to said bottom wall and closed at the opposite end by a first base portion; a tab member in said first base portion, said tab member being partially circumscribed by a line of reduced material thickness, said first base portion being adapted to separate along said line in response to an overpressurization of the contents of said container, thus freeing said tab member for outward deflection to provide an outlet through which said contents may escape; and a second element having a second circular wall forcibly received within the first circular wall of said first cup, said second circular wall being dimensioned to coact with said first circular wall to radially stress said first base portion in tension. For use with a container having an internally concave closure wall, a pressure relief device comprising: an externally protruding impression in said closure wall, said impression having a single weakened line of reduced material thickness partially circumscribing a tab member, said line being adapted to rupture in response to overpressurization of the contents of said container, thus permitting said tab member to deflect outwardly and to create an opening through which said overpressurized contents may be vented to the atmosphere, and metering means forcibly seated in said impression for radially outwardly stressing said impression and for reducing the rate at which said contents are vented through said opening.