Method of and arrangement for rinsing out impurities from ground
US5380126A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 19, 1993 |
| Grant date | Jan 10, 1995 |
| Priority date | — |
| Expiry date | May 19, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB09C2101/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A device for rinsing contaminants from ground comprises a perforated well tube sunk through a well shaft in the ground to ground water. The ground water is received in the well shaft through lower perforations, pumped up the well shaft, and out to upper ground regions through upper perforations, so that it can circulate back down to the ground water level, thus flushing contaminants from the upper ground regions. The circulation is accomplished with a well tube insert assembly placed in the well tube, comprising a seal device intermediate upper and lower well tube portions, a pipe through the seal, and a pump in the pipe to pump water from the lower portion to the upper portion. After circulation is established, the well tube insert assembly may be raised within the well tube to raise the level of circulation in the ground. A filter or cleaning device may be placed in the circulation path to remove contaminants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.