US 5,361,930 AGranted

Two-piece nestable septic tank with integral antifloatation collar

OwnerCarlos Perryinventor

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Abstract

A septic tank is constructed from top and bottom shells. The top and bottom shells are nestable within like top and bottom shells in order to allow greater numbers of septic tanks to be shipped one a cargo truck or railroad car. In a preferred embodiment, both the top and bottom shells have peripheral flanges that interlock together. The septic tank is assembled at its sight of intended use by placing the top and bottom shells together, inserting a gasket material between the interlocking peripheral flanges, and affixing a plurality of clips over the interlocking peripheral flanges to hold the top and bottom shells together. Preferably, the peripheral flanges serve the function of an integral antifloatation collar for the septic tank. The antifloatation collar increases the cross sectional area of the septic tank over which soil is applied, and allow the tank to be firmly held in the ground without the use of an anchor or ground screw.

Claims7

Dependent claims

A septic tank, comprising:

a hollow housing for holding a volume of liquid, said hollow housing having a top, a bottom, and a plurality of side walls connecting said top and said bottom, said hollow housing having a first perimeter that is the greatest distance around an outside surface of said plurality of side walls;
means for admitting liquid into and withdrawing liquid from said hollow housing;
and
an antifloatation collar integral with said hollow housing which projects from said outside surface of said plurality of side walls in a plane that is parallel to said top and said bottom of said hollow housing to a second perimeter which is greater than said first perimeter that is the greatest distance around said outside surface of said plurality of side walls, said antifloatation collar being of sufficient rigidity to resist bending under the influence of buoyancy forces exerted on said bottom of said hollow housing, said second perimeter of said antifloatation collar being of a size sufficient to prevent floatation of said hollow housing in dry and saturated soils.

1 more element

Dependencies are inferred from the claim text.