US 5,499,743 A · Flexible tank for liquids

Abstract

A flexible tank for liquids constructed from an inner layer of waterproof, thin-walled flexible polypropylene foil and an outer layer of flexible, highly compressed, tear-resistant polypropylene cloth. The construction provides a light weight tank which may be rolled up and easily transported. The tank is provided with an inlet and one or more large diameter (5 cm) outlet valves from which liquid in the tank may be dispensed without the use of a pump although a water or air pump may be used as an aid in dispensing the liquid. An insulating layer may be located above and/or below the tank or between the inner and outer layers. A heat absorbing layer may be placed above the tank and may be used in combination with an insulating layer under the tank. The tank may be provide with flow lines, valves and connectors for connection to other tanks to form a multiple arrangement of tanks.

Claims21

Dependent claims

A flexible tank for liquids, comprising:

(a) an inner layer for retaining liquids within said tank, said inner layer comprising a first longitudinally seamless tubular segment of thin-walled, flexible foil and first means sealing the ends of said first tubular segment;
(b) an outer layer for reinforcing said inner layer, said outer layer comprising a second longitudinally seamless tubular segment of tear-resistant material and second means sealing the ends of said second tubular segment;
(c) insulating means associated therewith for reducing heat loss from the liquid in said tank, said insulating means comprising an upper insulating layer above said tank resting on said outer layer and a lower insulating layer below said tank with the bottom portion of said outer layer resting on said lower insulating layer, said insulating layer above said tank comprising aluminum foil.

Dependencies are inferred from the claim text.

Flexible tank for liquids

Life of this patent

Flexible tank for liquids

Life of this patent

Abstract

Claims21