Storage vault and method for manufacture
US5157888A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 7, 1991 |
| Grant date | Oct 27, 1992 |
| Priority date | — |
| Expiry date | Nov 7, 2011 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04H7/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A dual containment, free-standing, earthquake resistant, above-ground, flammable liquid storage vault is made by first pouring a reinforced concrete outer tank having a flat bottom, for stability, and side walls. The inner surface of the concrete outer tank is covered with an epoxy resin, the epoxy resin acting as an outer liquid barrier to provide secondary containment. A layer of gravel is placed on the epoxy resin covering the bottom of the outer tank. A primary containment steel inner tank is then placed in the outer tank with a space between the walls of the inner and outer tanks. That space is then filled with concrete when a concrete cap is poured covering the inner tank. Leaks from the inner tank are monitored at the gravel layer. The concrete outer tank has integrally formed skids extending from its lower surface for ease of movement and for visual inspection beneath the vault for leaks. The vault can also be made by placing the inner tank within a freestanding, open-top shell; the combination is then encased in reinforced concrete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.