Abstract

The invention relates to a cellular filter with an across the row of cells riding flushing bridge that is provided with the means for the water and air flushing and with along the cells advancing injection nozzle for flushing water and air. There are adjusting means providing a movement of the nozzle perpendicular to the advancing direction along the cells to press the nozzle onto the injection port during cell treatment and to keep it spaced from the cells during advancement. The with the injection nozzle provided injection tube is pivoting mounted and the adjusting means provide a forced pivoting of the injection tube.

IPC Classes  ?

• B01D 24/00 - Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof

Abstract

This invention relates to a method to make a pit to withdraw or store or infiltrate water; a pit to withdraw or store or infiltrate water; a method to withdraw water from a water bearing package or to store or infiltrate water, particularly wherein use is made of a filter tube contrary to a drainage tube. The filter tube can be provided with a sheath/ jacket of filter sand of gravel.

IPC Classes  ?

• E03B 3/26 - Well filters formed of loose materials, e.g. gravel with packed filtering material
• E21B 43/04 - Gravelling of wells
• E21B 43/08 - Screens or liners