Liquid drainage unit

Details Liquid drainage unit Liquid drainage unit

2005-02-15

2005-02-15

Will, Thomas B. (Department: 3671)

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

C210S170050

Reexamination Certificate

active

06854924

ABSTRACT:
A pre-assembled drainage line unit includes a flexible longitudinally extending perforated sleeve member and a loose aggregation of lightweight elements contained within the sleeve member. A pliable, water permeable barrier material extends along the sleeve member and overlies at least a portion of the aggregation to prevent the passage of solid materials, such as sand and dirt, into the aggregation.

REFERENCES:
patent: 4983068 (1991-01-01), Kozak et al.
patent: 5015123 (1991-05-01), Houck et al.
patent: 6173483 (2001-01-01), Houck et al.
patent: 6527477 (2003-03-01), Allard
patent: 6551023 (2003-04-01), Allard
patent: 6705800 (2004-03-01), Ring et al.
“Helping the World Move Water”, HDPE Drainage Products, Advanced Drainage Systems, Inc.—2 pages.

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