Metal insert fitting for material storage tanks

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 90/00 (2006.01) B29C 39/00 (2006.01) B29D 22/00 (2006.01) B65D 88/08 (2006.01) B65D 88/54 (2006.01)

Patent

CA 2736973

A bulk storage container includes a tank with a "full drain" outlet, and a coupler attached to the outlet, in which the full drain outlet and coupler utilize a metal-on- metal threaded connection to create a fluid-tight seal therebetween. The polymer coupler includes a metal insert with internal threads, and the tank includes a metal insert with external threads corresponding to the internal threads of the coupler insert. The metal inserts are integrally molded within the walls of the tank and coupler, respectively. Advantageously, the threaded metal inserts provide a rigid structural connection between the tank and coupler that is highly durable and leak resistant. In addition to the threaded fluid-tight seal, a shoulder of the coupler abuts a corresponding face formed on the tank, with a gasket between the shoulder and face to provide a secondary seal.

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