Fluid filter with magnet and automatic bypass

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 35/06 (2006.01) B01D 35/147 (2006.01) B01D 35/30 (2006.01) F01M 11/03 (2006.01)

Patent

CA 2440292

A filter unit for coupling in-line with a transmission fluid line is provided for filtering ferrous and non-ferrous particulate matter from the transmission fluid. The filter unit includes a filter element (21) situated within a casing (12). The filter unit has an annular magnet (26) mounted on an end thereof. In an operational condition, the magnet is seated against an inner surface of the casing. As the filter becomes clogged, the filter element moves to a bypass position unseating the magnet from the casing. Fluid then bypasses the filter element but still flows around the magnet which continues to attract and trap ferrous particulate matter. A ferrous indicator flag (49) may be positioned on the outside of the casing when the filter element is in its operational position and is released and falls away as a visual indication of a clogged filter element in the bypass position.

L'invention concerne une unité de filtrage destinée à être raccordée en ligne à une ligne de fluide de transmission. Cette unité de filtrage permet de filtrer des matières particulaires ferreuses et non ferreuses qui proviennent du fluide de transmission. Cette unité de filtrage comprend un élément de filtrage (21) situé dans un boîtier (12) ainsi qu'un aimant annulaire (26) monté sur une de ses extrémités. Lors du fonctionnement, l'aimant repose sur une surface intérieure du boîtier. En revanche, lorsque le filtre se bouche, l'élément de filtrage passe dans une position de dérivation qui retire l'aimant du boîtier. Le fluide contourne ensuite l'élément de filtrage mais flotte toujours autour de l'aimant, lequel continue d'attirer et de piéger les matières particulaires ferreuses. Un drapeau de signalisation ferreux (49) peut être disposé à l'extérieur du boîtier lorsque l'élément de filtrage se trouve dans sa position de fonctionnement. Ce drapeau de signalisation se libère et tombe afin de signaler visuellement qu'un élément de filtrage est bouché dans la position de dérivation.

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