Layered filtering structure

Details Layered filtering structure Layered filtering structure

2005-05-10

2005-05-10

Savage, Matthew O. (Department: 1724)

Liquid purification or separation

Filter

Supported, shaped or superimposed formed mediums

C210S496000, C210S499000, C210S510100, C419S002000, C428S549000, C428S615000

Reexamination Certificate

active

06889852

ABSTRACT:
A layered filtering structure (10) comprises at least a first layer (12) and a second layer (13). Each layer comprises a web of metal fibers which has been sintered. The two layers (12, 13) are in contact with each other. The first layer, most close to the filter inlet side has a porosity below 55%, and the second layer, closer to the filter outlet side has a porosity which is at least 20% greater than the porosity of the first layer. The first layer is compacted in a separate manufacturing step. The layered filtering structure combines the advantage of a small filter rating with a low pressure drop.

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patent: 0 561 001 (1993-04-01), None
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patent: 9414608 (1994-07-01), None

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