Patent ID: 8448668

Claim:
A device for damping pressure variations in a sealed chamber comprising: a fixedly held plane element in the sealed chamber and perforated by at least one orifice; at least one movable plane element arranged, during normal operation, in the same common plane as the fixedly held plane element of the chamber so as to cover the orifice of the fixedly held element, it being possible for said movable plane element to be spaced apart from the orifice toward the top or toward the bottom of the chamber, and the dimensions of said movable plane element being at least equal to those of the orifice of the fixedly held plane element; at least one joining member which makes the movable plane element integral with the fixedly held plane element and allows the movable plane element to be held in place, spaced apart or returned relative to the orifice of the fixedly held plane element, and said joining member has a rod surrounded by at least one torsion or compression spring; and said device being arranged so as to free or open the orifice in the event of elevated pressure on a first side of the fixedly held plane element relative to a second side opposite said first side, and in the event of elevated pressure on the second side of the fixedly held plane element relative to the first side.