Subterranean fluid filtering and drainage system

Details Subterranean fluid filtering and drainage system Subterranean fluid filtering and drainage system

1998-05-15

2000-04-11

Bagnell, David

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

405 45, 405 36, 521695, E02B 1100

Patent

active

060481315

ABSTRACT:
A fluid drainage and filtering system composed of stocked in-drains and spacers wrapped serpentine fashion with a non-woven fabric of fluid pervious material. Each in-drain has a dimpled core sheet defining spaced lands and surrounding valleys and a thickness related to the pitch distance between these lands. Each spacer has outer sheets of about 1/2 the thickness of the core sheet, but also having lands surrounded by valleys. The pitch distance of the lands in these outer sheets is also about 1/2 that of the thicker core sheets so the spacers and in-drains do not tend to nest into one another when the system is installed.

REFERENCES:
patent: 4182580 (1980-01-01), Hieda et al.
patent: 4182581 (1980-01-01), Uehara et al.
patent: 4490072 (1984-12-01), Glasser
patent: 4639165 (1987-01-01), Flecknoe-Brown
patent: 4880333 (1989-11-01), Glasser et al.

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