| 摘要 |
1. A valve indicating over-pressure and permitting depressurization of a container (2) adapted to contain a fluid, said valve comprising : - a deformable chamber (4, 14) communicating with the container (2), whereby to be exposed to the pressure of the fluid, - depressurization means (19) for the container (2), and - a first breakable member (9) adapted to be broken when the fluid pressure exceeds a predetermined maximum value, said member being provided to actuate, during its breakage, said depressurization means (19) for the container (2), characterized in that said valve additionally comprises means (5) for indicating deformation of said chamber (4, 14) and a second breakable member (8) mechanically connected to said first breakable member (9) and adapted to be broken when the fluid pressure exceeds a second predetermined value, less than the maximum value, said second member (8) being provided so that its breakage results in deformation of said chamber (4, 14) whereby to signal existence of over-pressure in the container (2), as a result of said signalling means (5), before the fluid pressure attains said maximum value.
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