Patent ID: 7396188
Filing Date: 2008-07-08
Classification: E03F

Abstract:
1. An arch shape cross section corrugated leaching chamber having a base, a top, and opposing sidewalls running upwardly from the base to the top, the sidewalls extending horizontally along the chamber length, which comprises: a sidewall portion running curvingly upward and inward toward the top of the chamber, the portion having a thickness and a plurality slots extending lengthwise horizontally and spaced apart upwardly alone the sidewall portion, for flowing water from within the interior of the chamber to the exterior of the chamber through the thickness of the sidewall portion in a direction which transverse to said length; each slot having an opening height proximate the exterior surface of the sidewall portion, which height is the vertical spacing between the horizontally-extending surfaces which define the slot; wherein the thickness of the upper end of said sidewall portion which is furthest from the base of the chamber is less than the thickness than the lower end of said sidewall portion which is nearest to the base of the chamber.