Dual media primary/secondary fuel filter

Details Dual media primary/secondary fuel filter Dual media primary/secondary fuel filter

1997-01-06

1998-06-16

Savage, Matthew O.

Liquid purification or separation

Plural distinct separators

Filters

210335, 210438, 210440, 210441, 210450, 210453, 210456, 2104932, B01D 2708

Patent

active

057664684

ABSTRACT:
A dual media fuel filter which combines the functions of filtering the fuel passing from a fuel source to a lift pump, and the function of filtering the fuel passing from the lift pump to the fuel injectors. The present invention provides a fuel pump with distinct primary and secondary fuel filter cartridges which are compression loaded into a self-contained oil filter canister adapted for threaded attachment to an engine block. The primary filter cartridge is provided to filter fuel drawn under suction from a fuel source into a lift pump, and is therefore provided with a relatively coarse filtering medium to allow for adequate fuel to pass therethrough even under negative pressure and cold temperature conditions. The secondary filter cartridge is provided with a relatively fine filtering medium to filter the fuel passing from the lift pump and into the fuel injectors.

REFERENCES:
patent: 3154487 (1964-10-01), Thorton et al.
patent: 3390778 (1968-07-01), Uhen
patent: 5217606 (1993-06-01), Ramponi et al.

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