Patent ID: 7870865
Filing Date: 2011-01-18
Classification: F16K,Y10T

Abstract:
1. A pressure relief bursting disc which is adapted to rupture at a predetermined pressure differential, having: a flange portion lying in a plane, a frustoconical sloping portion interior of the flange portion, and a dished portion interior of the sloping portion, said sloping portion having its wider end joined to the flange portion and sloping up from the flange portion in a first direction which, in use, is toward an applied pressure which causes said disc to rupture at said pressure differential and being joined at its narrower end directly to said dished portion, said dished portion having its concave side facing in said first direction, and the disc having a line of weakness, the disc having a first side facing in said first direction and an opposite side to said first side, said line of weakness being in said sloping portion, said sloping portion and said plane of the flange portion are at an acute angle in the range 20° to 45° to each other as seen in axial section of the disc, and at said opposite side of the disc, said sloping portion and a tangent to said dished portion at their connection are at an angle in the range 60° to 150° to each other as seen in axial section of the disc.