Patent ID: 9238525
Filing Date: 2016-01-19
CPC Classification: B65D,F16L,F17C,Y10T

Claim Text:
1. A drain assembly for a tank or containment vessel of the type having a flexible and removable interior liner, the drain assembly comprising: a drain intake in fluid communication with a wall traversing portion, said drain intake operatively deployable in proximity to the bottom of the tank and said wall traversing portion operatively deployable through a wall of the tank, said wall traversing portion including a conduit portion in fluid communication with said drain intake and with a location exterior to the tank, said conduit portion including an interior stopper plate and a threaded portion, said drain assembly including a hammer nut, said hammer nut threadably receivable over said threaded portion when said conduit portion is received through the wall of the tank wherein tightening said hammer nut upon said threaded portion causes said hammer nut to engage the exterior of the tank wall causing said stopper plate to compress the tank liner against the interior surface of the tank wall thereby securing said drain assembly to the tank wall and helping to prevent the unintentional leakage of the contents of the tank through the tank wall; and an interior plate, an exterior plate and a spacer, each of said interior and exterior plates and said spacer receivable about said conduit portion with said spacer positioned between said interior and exterior plates and said interior plate bearing against a first end of said spacer and said exterior plate bearing against a second end of said spacer, said interior and exterior plates positioned such that when said hammer nut is tightened upon said threaded portion said hammer nut engages said exterior plate, which engages said spacer, which engages said interior plate, causing said stopper plate to compress the tank liner between the stopper plate and the interior plate.