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US 5,368,395 AGranted
Flexible storage tank with removable inner liner
AssigneeILC Dover, Inc.
InventorRobert A. Crimmins
Life of this patent
Estimating the term…
Abstract
A collapsible flexible tank having an outer tank body of dimensionally stable material and an inner liner of which may be readily interchanged by opening up of zippered seams in the outer tank body. There are a plurality of toggle fasteners inside the outer tank for holding the inner liner in place. A fill and drain fitting at the top of the inner liner enables rapid filling and complete emptying of the tank.
Claims25
A collapsible flexible tank for storage of flowable material comprising
- an outer tank body made of a plurality of panels of flexible dimensionally stable fabric secured together at a plurality of seams to form a flexible tank of generally conical shape with a maximum diameter at its lower end and of progressively decreasing diameter toward its upper end with an opening at said upper end;
- a liner for positioning within said outer tank body of a similar size and shape and made of a pliant sheet impervious to said flowable material, said liner having an opening at its top which aligns with the opening at the top of said outer tank body;
- said outer tank body having at least one openable seam adjacent said upper end and quick connect and disconnect means for opening and closing said seam for insertion and removal of said liner;
- said outer tank body having an inner surface and said liner having a outer surface which confronts said inner surface when said liner is in position inside said outer tank body and a plurality of connecting means extending between said outer tank body and said liner for detachably securing at a plurality of discrete securing points within said outer tank body;
- a fill and drain means attached to the top opening of said liner.
2 more elements
A collapsible flexible tank for storage of flowable material comprising
- an outer tank body made of a plurality of panels of flexible dimensionally stable fabric, said panels having the shape of an elongated hexagon,
- said panels being secured together at a plurality of seams to form the outer tank body in a generally conical shape with a generally flat bottom and a maximum diameter at its lower end, said tank having sidewalls defining a progressively decreasing diameter toward an upper end of said outer tank body and an opening at said upper end,
- said elongated hexagon panels being mutually positioned so that one long end of each panel lies at the base of said outer body with the seams between adjacent panels extending horizontally and radially outwardly from the center of said generally flat bottom, said seams turning vertically upward to run along said sidewall and then turning radially inwardly and extending toward said opening in said upper end,
- a liner for positioning within said outer tank body and of a similar size and shape and made of a pliant sheet impervious to said flowable material, said liner having an opening at its top for alignment with the opening at the top of said outer tank body,
- a fill and drain means attached to the top of said liner;
- at least some of the seams of said outer tank body being openable and having quick connect and disconnect means for opening and closing thereof for the insertion and removal of said liner.
3 more elements
Dependencies are inferred from the claim text.