Prefabricated vertical earth drain and method of making the same

Details Prefabricated vertical earth drain and method of making the same Prefabricated vertical earth drain and method of making the same

1996-05-10

1998-10-13

Graysay, Tamara L.

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

521695, 405 49, E02B 1100, E02D 1900

Patent

active

058202960

ABSTRACT:
A prefabricated composite vertical earth drain which has an elongated corrugated flexible plastic core sheet with horizontal corrugations that provide continuous longitudinally extending drain channels. Desired longitudinally extending surfaces of these drain channels are provided with a series of closely spaced reliefs for inhibiting tendencies of the core to horizontally bend and fold or collapse, thereby pinching off the vertical drain channels.

REFERENCES:
patent: 1598300 (1926-08-01), Moran
patent: 4574541 (1986-03-01), Raidt et al.
patent: 4749306 (1988-06-01), Demeny et al.
patent: 4943185 (1990-07-01), McGuckin et al.
patent: 5213449 (1993-05-01), Morris
patent: 5489462 (1996-02-01), Sieber

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