Filter elements and methods for filtering fluids
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United States of America Patent
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Dec 12, 2017
Issued Date -
N/A
app pub date -
May 30, 2014
filing date -
May 30, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
A filter element has a filter structure and first and second end caps attached to the opposite ends of the filter structure. The filter structure includes an outer filter pack, an inner filter pack, and a helical support positioned between the outer and inner filter packs. The helical support may have flow channels and support ridges on the inner surface and the outer surface of the helical support. Unfiltered fluid may be directed outside-in through the outer filter pack and inside-out through the inner filter pack, the support ridges of the helical support supporting the outer and inner filter packs against the pinching forces associated with the pressure drops across the outer and inner filter packs. Filtrate may be directed axially along the flow channels of the helical support and discharged from the filter element.
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