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Double walled tank

a double walled tank and assembly technology, applied in the field of double walled tank assembly, can solve the problems of inability to replace the inner tank, damage to the previous double walled tank, and inability to provide the same protection for single walled tanks, so as to facilitate the interconnection of the shells and facilitate the drainage of the outer shell

Inactive Publication Date: 2007-03-15
CUSTOM METALCRAFT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a double walled tank assembly with an outer shell and an inner shell. The assembly includes spacers to maintain proper spacing between the shells and a resilient seal structure to maintain the shells in a desired spaced apart relationship. The spacers allow for telescopic interfitting of the shells during constructions and also allow for the flow of liquid in the outer shell for drainage or the provision of insulative or barrier materials between the shells. The technical effect of this invention is to provide a tank assembly with improved insulation and durability."

Problems solved by technology

However, single walled tanks do not provide the same measure of protection against spillage as do double walled tanks.
This is a relatively expensive technique, and moreover inevitably results in welded connections between the inner tank and the outer cladding, thus making it impossible to replace the inner tank.
However, this prior double wall tank suffered from the same drawbacks discussed above in that the inner shell was welded to the outer shell at least at the top and drainage ports.

Method used

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Examples

Experimental program
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Embodiment Construction

[0024] Turning now to the drawings, a double wall tank 12 is in the form of an upright, liquid-holding tank which is generally quadrate (e.g., rectangular) in cross-section and includes telescopically interfitted outer and inner shells 14 and 16, respectively, and cover 18 operably secured to outer shell 14. The tank 12 is designed for the secure storage and transit of materials including, e.g., dangerous liquids, and is of a size and configuration for transportation enclosed transport vehicles such as conventional trucks, trailers and sea vans.

[0025] In more detail, the outer shell 14 includes a bottom wall 20 as well as upstanding, interconnected sidewall structure 22 secured to and extending upwardly from bottom wall 20 and defining an upper open end 24. Four corner-mounted legs 26 are secured to the shell 14 adjacent the bottom wall 20 thereof in order to elevate the tank above a supporting surface. The bottom wall 20 has an opening 28 formed therein (see FIG. 8) with an annula...

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PUM

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Abstract

A double walled tank (12) is provided which includes an outer shell (14), a telescopically interfitted inner shell (16), and a cover (18) secured to outer shell (14). The tank (12) includes at least one spacer (48) located between the inner and outer shells (16, 14), as well as resilient seals (38, 72) serving to maintain an appropriate and safe spacing gap between the shells (14, 16). The inner shell (16) includes a top wall (38) equipped with a fill opening (52) defined by an upstanding central flange (50, 50a) surmounted by a detachably secured cover (54, 54a).

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention is broadly concerned with an improved double walled tank assembly having telescopically interfitted inner and outer shells sized and configured in cube-efficient dimensions. More particularly, the invention is concerned with such double walled tank assemblies having the inner and outer shells maintained in a stable, spaced-apart relationship by means of spacers disposed within the gap between the shells. A detachable cover is secured to the outer shell and allows access to the inner shell top wall having a fill opening. [0003] 2. Description of the Prior Art [0004] Portable tanks are used extensively for the storage and transport of hazardous materials. To be most efficient, such portable tanks must be of a size and configuration that lend themselves to transport in standard over-the-road vehicles and containers. Single walled tanks are commonly constructed with these size considerations in min...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D90/02
CPCB65D85/84B65D2588/125B65D88/12
Inventor LONG, DWAYNEHIGGINS, SCOTTREDMOND, JOHN R.HOLDEN, DWAYNELETTERMAN, ROBERT
Owner CUSTOM METALCRAFT