Dewatering a leach field
US6969464B1 · kind B1 · utility
17Cited by
9References
4Claims
0Family size
Inventor
Key dates
| Filing date | Jan 17, 2002 |
| Grant date | Nov 29, 2005 |
| Priority date | — |
| Expiry date | Aug 19, 2022 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE03F1/002
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A leach field of a sewage system is dewatered, to restore its function when it is at or near failure. In various embodiments, water is withdrawn from the points in the leach field, preferably from the conduits, by means of suction or sub-atmospheric pressure. As water is drawn from the soil, air from the atmosphere or from an air mover enters resultant spaces in the soil, to restore the influence zone and better treat waste water. Forced air flow is used to fissure the soil, to aid dewatering, and separately, to restore the leach field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.