Expandable-volume liner for a collapsible liquid holding tank

Abstract

An expandable-volume liner is usable with a collapsible liquid holding tank frame consisting of top and bottom rails spaced apart by vertical struts. The expandable-volume liner has pliant impervious side walls, a pliant impervious floor panel and at least one pliant impervious collapsible bag extending outwardly from the liner. Each bag is optionally extendable between its respective surrounding top and bottom rails and adjacent struts to conform the tank to the differing footprints presented by various sites and the volume of liquid necessary to accomplish the task at hand. The liners are especially suited to firefighting applications and can be used in conjunction with existing frames built for non-expandable volume liners.

1 . (canceled) 
     
     
         2 . (canceled) 
     
     
         3 . A liner for a frame of a collapsible portable liquid holding tank, the liner comprising:
 a pliant impervious liner having side walls and a floor panel contoured to store a volume of liquid within an interior space defined by the frame; and   a pliant impervious collapsible bag extendable outwardly from said liner away from the tank, said bag being contoured to store an additional volume of liquid within an interior space defined by said bag, a level of liquid in said liner and said bag being simultaneously increased and decreased as said volume of liquid stored in said liner is increased and decreased, respectively.   
     
     
         4 . A liner according to  claim 1  further comprising another pliant impervious collapsible bag extendable outwardly from said liner away from the tank in a different direction than said pliant impervious collapsible bag, said another bag being contoured to store another additional volume of liquid within an interior space defined by said another bag, a level of liquid in said liner, said bag and said another bag being simultaneously increased and decreased as said volume of liquid stored in said liner is increased and decreased, respectively.