Corrugated leaching chamber
US7189027B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 1, 2003 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Oct 1, 2023 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F1/003
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A continuous curve arch shape cross section leaching chamber made of molded thermoplastic has closely spaced corrugations and sidewalls which are perforated with slots which slope downwardly, running from interior to exterior of the chamber. The slot height and or wall thickness vary with slot clevation from the base, to achieve a desired minimum Soil Threshold Angle in the slots, where said Angle parameter relates to resistance to entry of surrounding soil. Slotted wall thickness is less than about two times the thickness of the basic chamber wall thickness elsewhere. The chamber has properties and performance approximating prior art chambers, but has substantially less normalized weight and total weight.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.