초록 ▼

A molded plastic arch shape cross section corrugated leaching chamber has opposing perforated sidewalls running up from feet. Each foot comprises a horizontal flange, an outer-edge fin, and transverse ribs, which define compartments on the flange surface. Drain holes through the flange within each

A molded plastic arch shape cross section corrugated leaching chamber has opposing perforated sidewalls running up from feet. Each foot comprises a horizontal flange, an outer-edge fin, and transverse ribs, which define compartments on the flange surface. Drain holes through the flange within each compartment enable water from nearby sidewall perforations to flow downwardly into the soil during use.

대표청구항 ▼

We claim: 1. A molded plastic arch shape cross section corrugated leaching chamber having opposing side perforated sidewalls having perforations for passage of wastewater from the interior of the chamber into the surrounding soil, which comprises: opposing side feet of the chamber, for supporting t

We claim: 1. A molded plastic arch shape cross section corrugated leaching chamber having opposing side perforated sidewalls having perforations for passage of wastewater from the interior of the chamber into the surrounding soil, which comprises: opposing side feet of the chamber, for supporting the chamber on soil during use, opposing perforated sidewalls, running upwardly from each foot; wherein at least one foot comprises a horizontal base flange; a vertical fin, running along the outermost edge of the horizontal base flange; a multiplicity of spaced apart ribs running along the horizontal base flange, to connect an opposing perforated sidewall of the chamber to a respective fin; wherein the ribs, and local portions of the respective opposing perforated sidewall, fin and flange define at least one compartment on the horizontal base flange with the perforations serving to direct water flow into each respective compartment; and, at least one drain hole through the foot, to enable water flowing into the compartment to flow into soil outside the compartment, wherein the at least one drain hole is configured such that the total flow area of the at least one drain hole is at least equal to the flow area of the perforations which direct water flow into the respective compartment. 2. A molded plastic arch shape cross section corrugated leaching chamber having opposing side perforated sidewalls for passage of wastewater from the interior of the chamber into the surrounding soil, which comprises: opposing side feet of the chamber, for supporting the chamber on soil during use, opposing perforated sidewalls running upwardly from each foot; wherein at least one foot comprises a horizontal base flange; a vertical fin, running along the outermost edge of the horizontal base flange; a multiplicity of spaced apart ribs running along the horizontal base flange, to connect the opposing perforated sidewalls of the chamber to the fin; wherein the ribs, and local portions of the opposing perforated sidewalls, fin and flange define at least one compartment on the horizontal base flange; and at least one drain hole through the foot, to enable water flowing into the compartment to flow into soil outside the compartment, wherein the flow area of drain holes in the compartment is equal or greater than the flow area of the perforations of the chamber sidewall portion which forms a side of the compartment, which perforations have exits lower in elevation than the plane of the top of the fin. 3. The chamber of claim 2 having a multiplicity of compartments and a multiplicity of spaced apart holes through the horizontal base flange within each compartment. 4. The chamber of claim 2 having a multiplicity of spaced apart holes through the vertical fin which forms a boundary of the compartment. 5. The chamber of claim 2 having a multiplicity of spaced apart holes through the horizontal base flange which forms the base of the compartment. 6. The chamber of claim 2 having a combination of multiplicity of spaced apart holes running through the fin and a multiplicity of spaced apart holes running through the horizontal base flange. 7. The chamber of claim 2 wherein there are a multiplicity of spaced apart holes through the horizontal base flange within the compartment, wherein the edges-of any circular holes are spaced apart from each other by at least one hole diameter, and the edges of any non-circular holes are spaced apart by a dimension which is at least equivalent to the width of the non-circular hole. 8. A molded plastic arch shape cross section corrugated leaching chamber having opposing side perforated sidewalls for passage of wastewater from the interior of the chamber into the surrounding soil, which comprises: opposing side feet of the chamber, for supporting the chamber on soil during use, opposing perforated sidewalls running upwardly from each foot; wherein at least one foot comprises a horizontal base flange; a vertical fin, running along the outermost edge of the horizontal base flange; a multiplicity of spaced apart ribs running along the horizontal base flange, to connect the opposing perforated sidewalls of the chamber to the fin; wherein the ribs, and local portions of the opposing perforated sidewalls, fin and flange define at least one compartment on the horizontal base flange; and at least one drain hole through the foot, to enable water flowing into the compartment to flow into soil outside the compartment, wherein the at least one compartment and the at least one drain hole includes having a multiplicity of compartments and a multiplicity of spaced apart holes through the horizontal base flange within each compartment wherein the flow area of the multiplicity of drain holes in each compartment is equal or greater than the flow area of the perforations of the chamber sidewall portion which forms a side of the compartment, which perforations have exits lower in elevation than the plane of the top of the fin.