COMBINATION FILTER ARRANGMENT AND METHOD
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United States of America Patent
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N/A
Issued Date -
Nov 22, 2012
app pub date -
Jul 30, 2012
filing date -
Jan 24, 2008
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
A cartridge type filter is mounted in a housing and is serviced through the top of the housing. The cartridge includes first and second media packs axially stacked. The second media pack is in series behind the first media pack, and filters a portion of the liquid therethrough. The second media pack has a higher efficiency than the first media pack. The overall design has a drain system which allows liquid to drain from the interior of the filter housing and back to the sump before the filter cartridge is completely removed from the housing. Other optional features include an oil cooler, various valving, and a filter cartridge lockout mechanism.
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