| abstract |
A bottle (1) charged with a gaseous material intended to be discharged through a range of temperatures but not outside that range, has a valve (10) through which the gaseous material is to be directed. The valve has at least a part (25) wholly inside the bottle, which part has a restricted port (60) through it through which the gaseous material passes to issue from the valve, and a thermally responsive member (56, 65) adapted to block the port when the temperature of the interior of the bottle is outside the range. Preferably, the gaseous material is both introduced to the bottle and discharged from the bottle through the same valve, and the valve has a fill port (29) of larger diameter than the restricted port, and an axially moveable actuating element (40, 43, 50), and the thermally responsive member is carried by the actuating element. |