Underground drain tank
US5656766A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 1995 |
| Grant date | Aug 12, 1997 |
| Priority date | — |
| Expiry date | Sep 22, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01M3/32
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A drain tank for installation underground has a longer life than steel and fibreglass tanks and has a leak detection system to identify leaks. The drain tank comprises a sealed concrete chamber having at least one opening at the top thereof with a collar integral therewith, a manway connected to the collar extending upwards, the manway having a top lid with a vent and pump out exit. Inside the concrete chamber is an impervious bag liner which is sealed to the collar; an entry pipe passes through the chamber side wall and the liner and a leak detector tube passes down into the chamber to a location at the base between the chamber and the liner having an intermediate gap spacing arranged therein for an insertion tube to pass therethrough thereby facilitating the task of leak detection when interconnecting such insertion tube with a vacuum means and a suction reservoir.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.