PRESSURE RELIEF DEVICE FOR PRESSURIZED CONTAINER

摘要

A pressure relief device for venting an internally pressurized container and an aerosol can having a can bottom containing this pressure relief device. The pressure release device includes a coined pressure vent within a domed can bottom. The pressure vent is characterized by a venting pressure greater than about 500 psig. In addition, the can bottom resists eversion and/or failure along the mechanical attachment to the container body at all pressures between the venting pressure and the longitudinal rupture pressure in the container body.

主权项

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 about 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, wherein the ratio of the plateau diameter to the elevation of the sloped annular sidewall is in the range of about 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, a body rupture pressure of at least 700 psig and bottom eversion pressure in excess of the body rupture pressure.