Underground drain tank

Details Underground drain tank Underground drain tank

1995-09-22

1997-08-12

Williams, Hezron E.

Measuring and testing

With fluid pressure

Leakage

73 405R, G01M 332, B65B 3104

Patent

active

056567669

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.

REFERENCES:
patent: 4936705 (1990-06-01), Schneider
patent: 4989447 (1991-02-01), Gelin
patent: 5054312 (1991-10-01), Wilson, II
patent: 5072609 (1991-12-01), Sharp
patent: 5072623 (1991-12-01), Hendershot
patent: 5117677 (1992-06-01), Hendershot et al.
patent: 5167142 (1992-12-01), Sharp
patent: 5184504 (1993-02-01), Spring
patent: 5191785 (1993-03-01), Kidd et al.
patent: 5269172 (1993-12-01), Daigle et al.
patent: 5400646 (1995-03-01), Kraus et al.

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