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Combination filter arrangment and method

Title: Combination filter arrangment and method.
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. ... Browse recent Donaldson Company, Inc. patents
USPTO Applicaton #: #20120292240
Inventors: John R. Hacker, Bradley S. Honermann, Mark S. Emery

The Patent Description & Claims data below is from USPTO Patent Application 20120292240, Combination filter arrangment and method.

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stats Patent Info
Application #
US 20120292240 A1
Publish Date
Document #
File Date
Other USPTO Classes
210252, 210256
International Class

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