Patent ID: 7389891
Filing Date: 2008-06-24
Classification: E03F

Abstract:
1. A molded in one piece plastic fluid distribution tank adapted for subterranean burial, having a top, a closed bottom and a plurality of vertical outer walls forming with the bottom, an open top fluid container, comprising: a first vertical outer wall of said plurality of vertical outer walls having a top and a bottom and comprising a first planar outer surface, a plurality of grooved annular circuits in said first planar outer surface of said first vertical outer wall, of equal diameter, extending in vertical overlapping sequence, the centers of the annular circuits being vertically spaced from one another, said first vertical outer wall being continuous across said grooved annular circuits so that liquid cannot pass through said first vertical outer wall at the grooves, said grooved annular circuits formed on the first wall so that a hole can be made through the first wall at any height of a plurality of heights between the top and the bottom of the first wall by removing the portion of the first wall that is circumscribed by the circuit at the desired height, a first groove of said grooved annular circuits having a top at said first planar outer surface, and a first depth from said first planar outer surface to a first apex in said first vertical outer wall, a first side of said first groove of the plurality of grooved annular circuits forming a V in cross section with a second side of said first groove, said second side extending from said first planar outer surface to said first apex, said first side extending from said first planar outer surface to said first apex, sloping continuously toward said first apex, deviating at least once between said first planar outer surface and said first apex (