Patent ID: 7234481
Filing Date: 2007-06-26
Classification: F16K,Y10T

Abstract:
1. A safety pressure relief device comprising a reverse buckling rupture disc comprising: a) a planar annular flange portion having a first side and a second side, b) a central dome portion standing up from said first side of said flange portion, and c) an annular transition portion between said flange portion and said dome portion, said transition portion also standing up from said first side of said flange portion and joining said flange portion at a first junction and said dome portion at a second junction, wherein, as seen in a cross-section of the disc perpendicular to the plane of said flange portion, said transition portion is of a linear extent extending from said first junction at a first acute angle to said plane of said flange portion, and the tangent to the dome portion at said second junction makes a second acute angle with the plane of said flange portion which is greater than said first acute angle, said disc further having a line of weakness formed in the linear extent of the transition portion and extending around at least part of said linear extent, and said safety pressure relief device further having a support ring permanently fixed to said second side of said flange portion and being positioned to provide support of said first junction when reverse buckling pressure is applied to said dome portion.