Abstract: A filter assembly (100) comprises a housing (200) and a filter cartridge (300) that incorporates crankcase pressure-regulating components. The cartridge (300) includes an end cap (330), a plunger (340), and a spring (350). When the filter cartridge (300) is installed in the housing (200), the plunger (340) interacts with a podium (224), in response to crankcase pressure, to allow or block fluid communication with the inlet chamber (111).

Abstract: An oil-collecting can (500) for a filter cartridge (300) comprises a plurality of capillary ribs (530) that are sized and shaped to contact filter media in the outlet chamber. The oil-collecting can (500) can be used in conjunction with a filter cartridge (300), which is installed in a filter assembly to encourage the downward flow of oil droplets. Such a filter assembly could be used, for example, in a crankcase ventilation system, to remove particulates and other contaminants from piston-bypass fumes.

Abstract: A filter assembly (100) comprises a housing (200) and a filter cartridge (300) that incorporates crankcase pressure-regulating components. The cartridge (300) includes an end cap (330), a plunger (340), and a spring (350). When the filter cartridge (300) is installed in the housing (200), the plunger (340) interacts with a podium (224), in response to crankcase pressure, to allow or block fluid communication with the inlet chamber (111).

Abstract: An oil-collecting can (500) for a filter cartridge (300) comprises a plurality of capillary ribs (530) that are sized and shaped to contact filter media in the outlet chamber. The oil-collecting can (500) can be used in conjunction with a filter cartridge (300), which is installed in a filter assembly to encourage the downward flow of oil droplets. Such a filter assembly could be used, for example, in a crankcase ventilation system, to remove particulates and other contaminants from piston-bypass fumes.

Abstract: A filter for removing liquid contaminants from a fluid stream. The filter includes a housing with an internal chamber and inlet and outlet ports. A sump with a drain port is located intermediate the inlet and outlet ports. Expanded aluminum filter media in bunched form is located in the chamber and can be inserted through the inlet port. A support disc supports the downstream end of the filter media at a predetermined axial location within the chamber, and has an aperture allowing contaminant-free gas flow downstream to the outlet port. The liquid contaminants and emission particles are separate by the filter media and agglomerate for collection in the sump and for draining through the drain port, while the support disc prevents the liquid contaminants from migrating downstream along the walls of the housing.