Dual pass fuel filter assembly and element therefor

B - Operations – Transporting – 01 – D

Patent

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Details

B01D 29/15 (2006.01) B01D 29/21 (2006.01)

Patent

CA 2386232

A filter assembly (18) includes a replaceable filter element (56) disposed within a filter housing (50). The housing (50) includes a removable cover (51), and a fitting (60) including an internal central conduit (72) extending along the central axis of the housing (50). The central conduit (72) is bisected along its length by a wall (74) into a pair of flow channels (76, 78) connected to a pair of ports (28, 16) in the fitting (60). Another port (22) is provided in the fitting (60) and a still further port (26) is provided in the housing (50). The filter element (56) includes a first circular imperforate end cap (110), and a second annular imperforate end cap (112) dimensioned to receive the central conduit (72). First and second filter media loops (124, 125) are supported between the first and second end caps (110, 112). An imperforate cylindrical wall (156) is radially disposed between the first and second filter media loops (124, 125). Annular seals (123, 150, 158) are provided around the opening in the second end cap, at the inner end of the first filter media loop, and at the inner end of the cylindrical wall. The seals (123, 150, 158) provide a fluid seal against the central conduit (72) when the filter element is installed in the housing to fluidly separate two flow paths through the housing (50).

La présente invention concerne un assemblage de filtre (18) comprenant une cartouche filtrante jetable (56) disposée à l'intérieur du logement d'un filtre (50). Le logement (50) comprend un couvercle amovible (51), et un raccord (60) comportant un conduit central interne (72) s'étendant le long de l'axe central du logement (50). Le conduit central (72) est partagé, par une paroi (74), dans le sens de la longueur, en deux canaux de coulée (76, 78) reliés à une paire d'orifices (28, 16) dans le raccord (60). Le raccord (60) contient un autre orifice (22) et le logement (50) comporte encore un autre orifice (26). La cartouche filtrante (56) comprend un premier capuchon d'extrémité, circulaire, non perforé (110), et un second capuchon d'extrémité, annulaire, non perforé (112) dimensionné afin de s'adapter au conduit central (72). Des première et seconde boucles de support de filtre (124, 125) sont supportées entre les premier et second capuchons d'extrémité (110, 112). Une paroi cylindrique non perforée (156) est disposée radialement entre les première et seconde boucles de support de filtre (124, 125). Des joints annulaires (123, 150, 158) sont placés autour de l'ouverture dans le second capuchon d'extrémité, à l'extrémité intérieure de la première boucle de support de filtre, et à l'extrémité intérieure de la paroi cylindrique. Ces joints (123, 150, 158) permettent d'obtenir l'étanchéité vis-à-vis du conduit central (72), lorsque la cartouche filtrante est installée dans le logement, afin de séparer les deux voies d'écoulement dans le logement (50).

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