Fuel filter
AssigneeMann+Hummel GmbH
InventorsJohannes Lampert, Andre Rösgen
Life of this patent
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Abstract
A fuel filter has a filter housing and an annular filter element arranged in the filter housing. Between the bottom of the filter housing and the bottom area of the filter element a water collecting chamber is formed. The filter element has a coalescing element and a particle filter element. Fuel flows radially from the interior to the exterior of the coalescing element and from the exterior to the interior of the particle filter element. A riser tube extends through the clean chamber and the raw chamber from the bottom of the filter housing to the top. The riser tube has a clean channel and a guide channel. A seal on the riser tube separates a clean chamber from a raw chamber of the filter. A water removal tube is arranged inside the guide channel for removing water from the water collecting chamber.
Claims7
A fuel filter comprising:
- a filter housing having a bottom;
- an annular filter element arranged inside the filter housing, wherein between the bottom of the filter housing and a bottom area of the filter element a water collecting chamber is formed;
- wherein the filter element is comprised of a coalescing element and a particle filter element,
- wherein fuel flows radially from an interior of the coalescing element to an exterior of the coalescing element and
- wherein fuel flows radially from an exterior of the particle filter element to an interior of the particle filter element,
- wherein the interior of the coalescing element is a raw chamber and the interior of the particle filter element is a clean chamber;
- a riser tube extending through the clean chamber and the raw chamber from the bottom of the filter housing to a top of the filter housing,
- wherein the riser tube comprises a radially outer tube and a radially inner tubular guide channel member and wherein a clean channel is defined between the outer tube and said tubular guide channel member arranged interior to said outer tube and further comprises a guide channel defined by and interior to said guide channel member,
- a sealing means provided on the riser tube,
- wherein the sealing means separates the clean chamber from the raw chamber;
- a water removal tube arranged inside the guide channel,
- wherein water collecting in the water collecting chamber is removed through the water removal tube from the water collecting chamber.
Dependencies are inferred from the claim text.