Pressurizable container having a safety device for releasing exc

Receptacles – Container attachment or adjunct – Pressure relief means

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Details

137 68R, 137 70, 137 71, F16K 1716

Patent

active

044769911

ABSTRACT:
There is disclosed a safety device for releasing excessive pressure in a pressurizable container having a pressure release outlet, rupturable closure element in the form of a membrane which hermetically seals the outlet, a cutting device arranged to rupture the closure element when a predetermined maximum pressure in the container is exceeded, a rigid retaining device which holds the cutting device in a position out of engagement with the closure element when the container pressure is less than the predetermined maximum pressure, and a predetermined weakening provided on the retaining device which breaks when the predetermined maximum pressure is exceeded so as to allow the cutting device to move under the action of the pressure in the container so as to rupture the closure element. The retaining device is rigidly connected to the cutting device, and the latter is rigidly connected to a first plate. The closure element is clamped between the first plate and a second plate in such a way that a rupturable rim is defined to be engaged by a cutting edge of the cutting device. The retaining device, the cutting device and the first plate are arranged on the side of the closure element which faces the interior of the container. The safety device is therefore able to react suddenly to cause rapid movement of the cutting device when the maximum pressure is exceeded. The closure element is passive, so the choice of material is therefore greater, and the general shape of the closure element is not limited to a circle.

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