Leaching chamber having pillars and wide peak corrugations

Abstract

A plastic leaching chamber has an arch shape cross section, corrugations, and one or more hollow pillars extending downwardly within the interior of the chamber, to support the top of the chamber when the chamber is under load during use. Chambers nest within one another to form a stack of chambers for transport or storage. Chambers have peak corrugations which are substantially wider than the intervening valley corrugations. Chambers having different widths and profiles have common size connectors.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit under 35 U.S.C. §119(e) of U.S. provisional application No. 61 / 396,524, filed May 28, 2010, and U.S. provisional application No. 61 / 269,880, filed Jun. 29, 2009, the disclosures of which are incorporated herein by reference in their entireties.TECHNICAL FIELD[0002]The present invention relates to apparatus for collecting, receiving, detaining or dispersing liquids when buried, in particular, to leaching chambers for receiving and dispersing wastewater.BACKGROUND[0003]As described in a number of patents and other publications, a familiar commercial leaching chamber is made of injection molded thermoplastic, has an arch shape cross section, an open bottom, a multiplicity of corrugations, and perforated sidewalls. Such chambers are buried in soil to receive wastewater, typically from a septic tank. An exemplary current commercial chamber is an Infiltrator® Quick4® chamber sold by Infiltrator Systems, Inc.,...

AI Technical Summary

Benefits of technology

[0010]An object of the invention is to provide a light weight molded plastic chamber for receiving and dispersing wastewater or stormwater, or for draining soils, where the chamber has good strength, good leaching area per unit length, and good storage volume per unit length, while at the same time efficiently using plastic material. A further object is to provide a leaching chamber which has a low profile along with the foregoing features. A still further object is to provide means for interconnecting chambers of different sizes.

[0014]The shape of the chamber wall and open top pillar(s) enable the chambers to stack in closely nested fashion, for economic shipment. To better enable removal of a first chamber from the top of a stack of nested chambers, in some chamber embodiments the pillar and the terminal ends of any interrupted peak and or valley corrugation are shaped so that an installer may manually lift one base flange of the chamber upwardly, to rotate the chamber about the opposing side base flange.

[0016]In some embodiments of the invention, the pillar bases provide between 4 and 15 percent, and up to 25 percent, of the total bearing area of the chamber, for supporting the chamber on soil; and, the masking of the underlying soil that results from the pillar bases is only a small percent of the leaching area of the chamber. Thus, the benefits which the one or more pillars provide are achieved without greatly compromising leaching area.

[0018]The unique corrugation width relationships enable more corrugations per unit length which increases strength, and they increase the amount of storage area and leaching area per unit length of chamber, compared to comparable chambers which have corrugations. Chambers having pillars and or the specially proportioned corrugation widths may have closed ends or open ends, with and without connectors for mating with other chambers. The corrugation width features may be used with or without pillars. The pillar features may be used in chambers without the corrugation width features.

[0019]In another aspect of the invention, when a group of chambers comprises a family which has different profiles and or different widths, each chamber in the group has a common-size end connector. Thus, a string of mixed size chambers can be created. And the number of accessories, such as end caps and couplers, which an installer has to carry in inventory, is reduced.

[0020]Exemplary chambers in accord with the invention are able to meet industry performance standards. They are strong, economically made, and economically transported and stored due to good stacking characteristics. Exemplary chambers have a combination of low profile and good strength, together with high storage volume, low plastic weight and high leaching area, all per unit length of chamber. Exemplary chambers may be made by different plastic forming means.

Problems solved by technology

In alternative chamber embodiments, the connectors overlap-underlap but do not enable pivoting in the horizontal plane.

Among other reasons, such ribs may increase stacking height.

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