Means for releasing leaves and debris from hand-held swimming po

Means to counteract a clogging of drain pipes

Mechanical screen, in particular filter apron of a chain filter

Mechanically cleanable screen

Mechanically raked bar screen

Mechanically raked bar screen with conveyor system having elasto

Mechanism for removing resinous sludge from a liquid resin vat

Method and a device for automatic cleaning of trashracks at wate

Method and apparatus for cleaning a purgible swimming pool strai

Method and apparatus for cleaning and filling an aquarium

Method and apparatus for filtering impurities out of fluid

Method and apparatus for installing and removing disposable...

Method and apparatus for optimizing electrolytic production of a

Method and apparatus for preventing algae growth in open-topped

Method and apparatus for recovering oil spill

Method and apparatus for recovery of waste water

Method and apparatus for remediating wastewater holding...

Method and apparatus for remediation and prevention of...

Method and apparatus for removing contaminants from a water supp

Method and apparatus for removing contaminants from industrial w