Filtration system utilizing a vortex mechanical power filter

Flow through filter with backflush clearing capability

Gravity screen filter with dynamic backwash

Helically wound expandable filter

Intermittent-action apparatus for filtering liquid

Method and device for unclogging filter cloths

Plural layer fiber filter element and system for cleaning

Screening apparatus

Self cleaning filter assembly with fluttering inner filter membe

Self-cleaning filter

Self-cleaning strainer

Self-cleaning strainer or filter

Spiral multiple-tube filter

Strainer

Strainer means for pulp purification

Strainer screen

Waste water grease filter

Water filter with fluid actuated cleaner