HIGH PERMEABILITY HOLE FILTER Russian patent published in 2004 - IPC

FIELD: water supply systems; water hole equipment.

SUBSTANCE: proposed hole filter includes gravel deflectors located on side surface in parallel with its axis; said deflectors are L-shaped in form and are located in pairs towards each other at clearance between ends forming horizontal slots equal to height of holes under deflectors and average diameter of gravel of cushioning layer; they have rectangular slots over their length which widen inside filter; their width is equal average diameter of gravel of cushioning layer. Vertical side holes for deflectors, horizontal slots between them and rectangular in deflectors are used as filtering surfaces.

EFFECT: increased porosity (permeability).

2 dwg