Patent ID: 9499330
Filing Date: 2016-11-22
CPC Classification: B05B,B65D,F16K

Claim Text:
1. A pressure relief device of domed construction adapted to vent contents of an internally pressurized container having a cylindrical body upon development of a pre-defined pressure in excess of 500 psig within the container, the pressure relief device comprising: a sloped annular sidewall intersecting a circular central plateau to define a flat top to a concave container bottom, the circular central plateau having a center point disposed at the center of the pressure relief device and an arc shaped coin line extending out an arc with the apex of the arc positioned at the center point of the circular central plateau and wherein the arc shaped coin line has a depth providing a remaining opposing web of material with a thickness of not less than about 0.005 inches, the arc shaped coin line being adapted to fracture and vent the contents of the container at the predefined pressure, wherein the ratio of the plateau diameter to the elevation of the sloped annular sidewall is in the range of about 1.3 to about 2.2 and wherein the pressure relief device is characterized by a venting pressure in excess of about 500 psig, wherein the cylindrical body has a body rupture pressure of at least 700 psig and wherein the container bottom has a bottom eversion pressure in excess of the body rupture pressure such that body rupture occurs at a lower pressure than bottom eversion.