Combination filter arrangement and method

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 8231793
APP PUB NO 20110042329A1
SERIAL NO

12864369

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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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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Patent Owner(s)

  • DONALDSON COMPANY, INC.

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Emery, Mark S Minneapolis, US 22 140
Hacker, John R Minneapolis, US 73 1229
Honermann, Bradley S Prior Lake, US 25 160

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