US 4,960,222 AGranted

Secondary liquid containment system

AssigneeRecontainer, Inc.

InventorGrethel C. Fields, III

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Abstract

System for safety storage of liquids including a closed horizontal cylindrical primary tank inside a partially closed horizontal cylindrical secondary tank spaced apart from each other so as to provide an open space around the outside of the primary tank and the inside of the secondary tank. The outer secondary tank being closed at one end with a circular head and being open at the other end with its original head repositioned interiorly so as to substantially close the secondary tank and leave an open recessed area inside the tank walls and outside the repositioned head; supporting structural beams along the outside of the secondary tank to support the outside system in a horizontal position; spacer skid members inside longitudinally along the inside bottom of the secondary tank on which to rest the primary tank; vents to vent each tank to the outside atmosphere, measure relief value, and a lockable filler housing through which the primary tank can be filled with liquid; a liquid pump connected to the inside of the primary tank to pump liquid therefrom through an exit delivery hose and nozzle; a suction pipe line connecting the primary tank to the liquid pump; and a closure plug for opening and closing the suction pump line.

Claims17

Dependent claims

A secondary containment system for storing liquids which comprises a totally enclosed cylindrical primary storage tank for liquid inside and spaced apart from a cylindrical secondary storage tank for liquid having one circular head at a closed end and a second circular head spaced inwardly from an open end, said tanks having mutually parallel longitudinal horizontal axes;

said secondary tank having two parallel elongated beam members fastened thereto on the outside of the secondary tank, generally parallel to said longitudinal axes and structurally adapted to be external supports for said secondary tank;
two parallel elongated lengthwise internal skid members in said secondary tank to support said primary tank in spaced relationship to and within said secondary tank;
said open end of said secondary tank comprising said second circular head positioned inwardly from said open end and spaced apart from said primary tank to leave a cylindrical open recess between said open end and said second circular head;
horizontal flooring in said recess, a dispensing liquid pump on said flooring with a suction line from said pump to the inside of said primary tank;
a first vent means from inside said primary tank to the atmosphere surrounding said secondary tank, a pressure relief means for said primary tank leading to the atmosphere surrounding said secondary tank;
and a passageway from outside said secondary tank to inside said primary tank for filling said primary tank with liquid.

3 more elements

Dependencies are inferred from the claim text.