Filter element

E - Fixed Constructions – 01 – C

Patent

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Details

E01C 5/00 (2006.01) E01C 7/00 (2006.01) E01C 11/22 (2006.01) E03F 5/06 (2006.01)

Patent

CA 2264661

A filter element (1) for liquid permeable floor area fastening (17), a floor covering plate (15), a manhole cover (15), a sewage cavity or the like, with at least one pre-filtering layer (3) in the direction of the through-flow (2) and at least one following filter layer (4,4'), wherein the free through-flow sections (a, b, b') of each layer (3, 4, 4') increase from layer to layer in the direction of the through-flow. The filter also comprises a housing (5) which surrounds the filter layers (4,4') in a framelike manner and maintains them, wherein each filter layer (4,4') is formed from granular material and the grains are available in loose form or linked to each other by a weak binding agent.

L'invention concerne un élément filtre (1) pour systèmes de fixation (17) de sol, plaques de revêtement (15) de sol, dispositifs de fermeture (15) de regard, bouches d'égout, etc., qui comporte, dans le sens de l'écoulement (2), au moins une couche de pré-filtration (3) suivie d'au moins une couche de filtration (4, 4'). Les sections d'écoulement libres (a, b, b') de chaque couche (3, 4, 4') augmentent d'une couche à l'autre dans le sens de l'écoulement. Le filtre comporte également une enveloppe (5) qui entoure et maintient à la manière d'un cadre au moins les couches de filtration (4, 4'). Celles-ci sont constituées d'un matériau granulaire, dont les grains sont libres ou liés entre eux par un liant faible.

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