Double wall underground storage tank
US5224621A · kind A · utility
18Cited by
11References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 4, 1992 |
| Grant date | Jul 6, 1993 |
| Priority date | — |
| Expiry date | Aug 4, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S220/918
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An underground storage tank comprises a cylindrical inner wall, a cylindrical outer wall of plastic resin and reinforcement fibers, and a layer of spacer filaments wound around the inner wall, the spacer filaments separating the inner and outer walls, and the spacer filaments being at least partially surrounded by voids to enable liquids to flow along the filaments.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.