US 2006/0037908 A1Published application

Reverse flow fuel filter

OwnerJohn Parkinsinventor

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Abstract

A filter cartridge according to aspects of the present invention positions the outside diameter of the filter element adjacent the inside of the filter cartridge housing. The larger outside diameter of the filter element expands the surface area of filter medium presented to fuel entering the filter cartridge. Positioning the outside diameter of the filter element near the inside surface of the cartridge housing promotes an axial fuel flow pattern across the outside surface of the filter media. This flow pattern is believed to sweep water from the surface of the filter media toward the sump of the cartridge. The flow pattern causes water droplets that coalesce on the outside of the filter media to combine into larger droplets, which then fall into the sump of the cartridge.

Claims19

Dependent claims

A filter cartridge for filtering fuel passing therethrough, for use with a header of the type having a first port, a second port, a central first conduit defining a first axial fuel passage communicable with the first port, a second conduit surrounding and cooperating with the first conduit to define a second axial fuel passage therebetween, the second axial fuel passage communicating with said second port, said filter cartridge comprising:

a housing defining a substantially cylindrical space having an inside diameter, said housing having a first end defining an axial opening to receive said first and second conduits;
a first end cap defining a second axial opening surrounded by a seal which sealingly engages an exterior surface of the first conduit when said cartridge is mounted to the base, said first end cap comprising a plate radially extending from said second axial opening to a first outside diameter, said end cap including angularly spaced ribs configured to maintain a fluid flow area between the housing and said plate;
and
an annular filter element having a second outside diameter and axially spaced first and second ends, said first end secured to said plate to define an annular flow passage between said second outside diameter and said housing second section,
wherein said fluid flow area has a radial dimension of between 0.050 and 0.30 inches and said annular flow passage has a radial dimension of between 0.050 and 0.150 inches.

2 more elements

A filter cartridge for use with a base having a central first conduit defining a first fluid passage communicating with an outlet port and a second conduit defining a second fluid passage communicating with an inlet port, said filter cartridge comprising:

a housing upper section having a first end defining a first axial opening, a substantially cylindrical first side wall having a first inside diameter, said first side wall extending from the first end to a second end and including a radially outward U-shaped bend;
and
a housing lower section having a substantially cylindrical second side wall at a second inside diameter greater than said first inside diameter, said second side wall having a first end joined to said upper section second end at a seam to define an interior space;
a substantially cylindrical filter element extending between first and second ends and having a first outside diameter greater than said first inside diameter and less than said second inside diameter;
an upper end cap secured to said filter element first end and mounted to said housing upper section to fix said filter element in said housing lower section, said upper end cap including a plate extending radially outwardly from a second axial opening through which said first conduit extends when said cartridge is mounted to the base, said plate having a radially outer periphery adjacent said second side wall first end and spaced from said second side wall to define a fluid flow area;
and
a lower end cap enclosing said filter element second end.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/207,502Filed 19 Aug 2005
Priority: 20 Aug 2004
Published: 23 Feb 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

B01D 36/006
Filters in combination with devices for the removal of liquids: purge means
B01D 27/06
With cartridges made of a piece of unitary material, e.g. filter paper: with corrugated, folded or wound material
B01D 27/08
Cartridge filters of the throw-away type: construction of the casing
B01D 36/003
Filter circuits or combinations of filters with other separating devices: filters in combination with devices for the removal of liquids

Family

Application60/603,353Us provisional application · filed 20 Aug 2004
US 2006/0037908 A1This patent

From the US filing history. Foreign family members aren’t listed.

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