Leaching chamber having high leaching area to weight ratio

  • US 7,465,122 B2
  • Filed: 03/12/2007
  • Issued: 12/16/2008
  • Est. Priority Date: 10/01/2003
  • Status: Active Grant
First Claim
Patent Images

1. A corrugated arch shape cross section plastic leaching chamber adapted for burial within soil during use, to receive and contain waste water and to provide chamber leaching area for flow of said water into the soil surrounding the chamber, the chamber having a multiplicity of corrugations comprised of alternating peaks and valleys running transversely across the arch of the chamber cross section, which comprises:

  • a base;

    a top; and

    opposing sidewalls, running upwardly from opposing sides of the base to the top;

    the sidewalls and top shaped so that the chamber has a continuous curve arch shape cross section;

    the chamber having an interior cavity contained within the arch shape cross section, for receiving and holding waste water;

    the chamber having a total chamber leaching area, for infiltrating waste water received within the interior cavity into soil surrounding the chamber;

    wherein the total leaching area is comprised of a first fraction and a second fraction;

    the chamber having an open bottom, characterized by the area lying between said opposing sides of the base, said open bottom area providing said first fraction of chamber leaching area;

    portions of said sidewalls having a plurality of upwardly spaced apart horizontally-extending slots for flow of water from the interior of the chamber and through the thickness of the walls and into the surrounding soil;

    each slot having a slot leaching area which is the smaller of the interior or exterior slot opening area;

    wherein the summation of said slot leaching areas provide a second fraction of said chamber leaching area;

    wherein other portions of said sidewalls and portions of the top are free of slots;

    said other portions having an average thickness which is the basic thickness of the chamber;

    the chamber having an interior volume of at least about 1.5 cubic feet per foot of chamber length;

    the chamber having a chamber leaching area to weight ratio of greater than about 100 square inches per pound of chamber weight, wherein chamber leaching area is comprised of said first and second fractions; and

    ,the chamber having a weight to length ratio of less than about 4 pounds per linear foot.

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