Double pass fuel filter assembly

Details Double pass fuel filter assembly Double pass fuel filter assembly

1995-08-08

1999-07-13

Lithgow, Thomas M.

Liquid purification or separation

Serially connected distinct treating with or without storage...

One unit inside another

210 90, 210130, 210132, 210172, 2104164, 210444, 210258, 210315, 210338, 210342, 210450, B01D 2714, B01D 2708

Patent

active

059221992

ABSTRACT:
A fuel filter assembly (10) has a head portion (12) and an element portion (14) enclosing a replaceable cartridge (18). The assembly has a first inlet port (22) which accepts fuel from a tank (90) and filters it by passage through a screen (43) supported on a tube (36). The fuel that has been filtered by passage through the screen is delivered from the assembly through a first outlet port (24) for delivery to a lift pump (96). Fuel from the lift pump is returned to the fuel filter assembly through a second inlet port (26). The fuel is finely filtered by passage through a loop of filter media (60). Clean fuel is delivered from a second outlet port (28) to an engine (104). Contaminants separated from the fuel by passage through the screen and the media loop are collected in first and second sump areas (78), (80) of the filter housing respectively. An alternative embodiment (110) includes a prefilter screen (158) integral with a replaceable cartridge (118).

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