Filter cartridge having air vent with restriction, assemblies, and methods

    公开(公告)号:US12239929B2

    公开(公告)日:2025-03-04

    申请号:US17281903

    申请日:2019-09-23

    Abstract: An air filter cartridge for filtering liquids, such as fuel or oil, can be used in a filter assembly. The air filter cartridge has first and second opposite end caps and filter media extending between the end caps. The first end cap has an air channel with an inlet and an outlet to allow for the bleeding of air from the unfiltered side to the filtered side, while minimizing the amount of liquid allowed to bypass the media. Due to the viscosity differences of air versus liquid (e.g. a hydrocarbon such as fuel or oil), a long vent with at least one thin axis impedes liquid flow to a greater degree than air flow through the same vent.

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