Corrugated septic tank with strengthening features
AssigneeInfiltrator Systems, Inc.
InventorsKurt J. Kruger, James J. Burnes
Life of this patent
Estimating the term…
Abstract
A molded thermoplastic tank for use as a septic tank or storage tank when buried in soil has a combination of transverse peak and valley corrugations in combination with one or more lengthwise peak corrugations, to provide in effect a molded-in beam structure. The lengthwise corrugations may be at the top, between spaced apart access ports, along the bottom. In one embodiment, the top has an H-shape pattern beam structure. In another embodiment separately formed plastic beams and or a combination of vertical and horizontal struts are inside the tank.
Claims11
A molded plastic tank for receiving and treating wastewater, having a generally oblong body comprised of a plastic wall and opposing end caps spaced apart along the tank length, the body having a generally rectangular or circular cross section;
- the tank having at least two spaced apart access ports at the top of the tank, disposed on either side of the midpoint of tank length, for providing access to the interior of the tank during use;
- the body wall having a plurality of corrugations running transverse to the tank length on the sides of the tank and on at least a portion of the top of the tank;
- said wall at the top of the tank shaped as a molded-in beam structure comprised of (a) at least one peak corrugation running lengthwise along the tank top from proximity of one access port to proximity of the other access port and (b) a lengthwise valley corrugation on each side of said at least one lengthwise peak corrugation, to space apart the lengthwise corrugation from the ends of at least some of said transverse corrugations at the top of the tank.
A molded plastic tank for receiving and treating wastewater, having a generally oblong body comprised of a plastic wall and opposing end caps spaced apart along the tank length, the body having a generally rectangular or circular cross section;
- the tank having at least two spaced apart access ports at the top of the tank, disposed on either side of the midpoint of tank length, for providing access to the interior of the tank during use;
- the body wall having a plurality of peak corrugations and valley corrugations running transverse to the tank length on the sides of the tank and across a portion of the bottom of the tank;
- at least two peak corrugations running lengthwise along the wall at the bottom of the tank;
- a valley corrugation running lengthwise between said at least two peak corrugations;
- and, a plurality of bridges running transverse to said at least one valley, to interconnect the lengthwise peak corrugations, wherein at least one bridge is discontinuous with a transverse-running peak corrugation.
Dependencies are inferred from the claim text.