Patent ID: 10472813

Abstract:
A subsurface fluid conveyance chamber is arch-shaped in cross-section, having a corrugated outer shell extending along a horizontal axis with a pair of contiguously molded end walls and alternating peak and valley corrugations along its length. Each peak corrugation forms an outer ridge having a top surface and a pair of sidewalls. Inner walls along each lateral side of the outer shell form interior chambers at each ridge location in the outer shell. Each interior chamber has an aperture formed in the inner wall, and two opposing apertures formed in each sidewall. The inner wall apertures are vertically offset above the outer shell apertures and form a gravity trap for the granular material, limiting entry to the lower section of the interior chambers. The angled pathways defined by the interior chamber aperture locations require directional changes in fluid flow that minimize contamination of the inner conveyance chamber during use.