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US 8,307,815 B2Granted
Crankcase ventilation filter assembly
AssigneeParker-Hannifin Corporation
InventorRonald G. Frazier, Jr.
Life of this patent
Estimating the term…
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).
Claims20
A filter cartridge comprising:
- filtration media having a radial outer surface, a radial inner surface defining an inlet chamber, an upper axial face, and a lower axial face;
- a top end cap including a ceiling sealed to the upper axial face of the filtration media, a center sleeve extending through the ceiling and communicating with the inlet chamber, and a tube within the sleeve;
- a plunger including a stem slidably received in the tube and a head having a radial span greater than that of tube and less than that of the sleeve;
- and
- a spring biasing the plunger's head axially upward and away from the inlet chamber.
2 more elements
Dependencies are inferred from the claim text.