Leaching chamber having varying slotted wall thickness

Details Leaching chamber having varying slotted wall thickness Leaching chamber having varying slotted wall thickness

2008-07-08

2008-07-08

Mayo, Tara L. (Department: 3671)

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

C405S043000, C138S173000

Reexamination Certificate

active

07396188

ABSTRACT:
A continuous curve arch shape cross section leaching chamber made of molded thermoplastic has closely spaced corrugations and sidewalls, portions of which are perforated with horizontal slots. Either or both of the slot height and the local wall thickness which defines the slots may vary with slot elevation from the base, so that a perforated sidewall configuration is achieved which resists entry of surrounding soil. In one embodiment, the slotted sidewall has slots with all the same slot openings and the wall thickness decreases with elevation.

REFERENCES:
patent: 4759661 (1988-07-01), Nichols et al.
patent: 6361248 (2002-03-01), Maestro

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