Environmentally safe underground piping system
US5263794A · kind A · utility
46Cited by
7References
25Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 19, 1992 |
| Grant date | Nov 23, 1993 |
| Priority date | — |
| Expiry date | Feb 19, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/2892
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An environmentally safe underground piping system which employes a inner flexible fluid supply piping system contained within an outer non-flexible containment piping system which interconnects a series of surface access chambers. Both the flexible supply and and non-flexible containment piping systems are interconnected by a series of directional fittings and couplings. The containment system may be installed, integrity tested, inspected and backfilled, prior to installation of the supply piping system which allows for a faster and more economical installation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.