Patent ID: 8020577

Claim:
A separable rupture disc assembly for a pneumatic pipeline plug having an end plate comprising: a) a disc holder body having an internally flanged cavity and a body end extending therefrom, said disc holder body further having a bore extending from said internal cavity to said disc holder body end; b) a rupturable disc structure having a periphery and being positioned in said internal cavity of said disc holder body, said periphery of said disc structure resting on said flange; c) a second body member having a bore therethrough, said bore being aligned with said bore of said disc holder body, said second body member further having means for securement to secure said rupturable disc structure within said internal cavity of said disc holder body, said second body member having a closed terminal end and at least one aperture therethrough in communication with said bore of said second body member for venting pressurized air from the pneumatic plug upon the rupture of said rupturable disc structure; and d) wherein the end plate of the pneumatic pipeline plug has a cover plate and wherein said second body member is incorporated and integral to said cover plate, said cover plate having an exterior surface extending outward below said closed terminal end and said at least one aperture of said second body member, said cover plate further having an interior surface exposing said means for securement whereby said disc holder body is positioned within the pneumatic plug when said cover plate is mounted to the end plate of the pneumatic pipeline plug.