Double wall steel tank
US5081761A · kind A · utility
Inventors
Key dates
| Filing date | Dec 12, 1990 |
| Grant date | Jan 21, 1992 |
| Priority date | — |
| Expiry date | Dec 12, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49826
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A double wall, light-weight tank construction for the storage of flammable liquids is formed from two conventional steel tanks having flame proof, curable cementitious insulative material between the walls. Spacers preformed preferably of the same cementitious material are glued about the exterior surface of a conventional inner tank having ports. An exterior tank is formed with one end cover being detachable. Apertures are cut in the exterior tank to align with the ports of the inner tank when it is in its final nested position within the exterior tank. Stoppers and vents are placed in a sidewall of the exterior tank. Both tanks are oriented vertically, and the interior tank is then lowered into the exterior tank with concentric alignment provided by the spacers. Nipples are then attached to the ports, and rings are placed over the nipples and welded to the nipples and the exterior tank. The detached end cover is welded to the exterior tank. The assembled tanks are placed horizontally or may remain vertically aligned. Mixed cementitious insulating material in plastic-phase is then pumped upwardly via the sidewall or the bottom stopper to fill the space between the tanks in a singl…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.