Patent ID: 8232497

Claim:
A relief valve for discharging a dielectric gas between two volumes (V 1 , V 2 ) of a high-voltage or medium-voltage interrupting chamber, the valve comprising: a body including at least one open passage with one end that defines a closure member seat, at least one stop member attached to the body and as a closure member, at least one flexible metal blade interleaved between the closure member seat and the stop member and having one end that is secured to the body, the metal of the blade being adapted to withstand high temperatures up to T 1 ≈2500° C., the flexibility of the blade allowing it to be deformed when gas coming from the open passage (V 1 , V 2 ) is at a pressure higher than gas on the same side (V 2 ) as the stop member and in a range of temperatures from T 0 to T 1 where T 0 ≈−50° C., from its closed position in which it blocks the seat to its fully open position in which it fits closely against the stop member whilst remaining within its elastic limit, said open passage being open in the fully open position of the blade, the flexibility of the blade enabling it to return from its fully open position to its closed position in the absence of any overpressure.