Filter arrangements; components; and, methods

Inventors

Lundgren, Thomas • Adamek, Daniel • Mosset, Wade

Assignees

Donaldson Co Inc

Abstract

Filter assemblies and components therefor, are described. In an example arrangement, the crankcase ventilation filter assembly is configured to be serviced from either the top or the bottom. A rotational indexing arrangement is to ensure appropriate orientation of an internally received filter cartridge, and other components of the arrangement are provided. Methods of assembly, servicing and use are described.

Core Innovation

The disclosed invention relates to a crankcase ventilation filter assembly having plastic housing components that can be serviced from either the top or bottom. The assembly includes a housing with an air flow inlet and an air flow outlet, and a liquid drain. An internally received replaceable filter cartridge is arranged to be installable and removable from either a top servicing position or a bottom servicing position.

The core feature enabling top and bottom servicing is a set of rotational indexing arrangements that ensure correct cartridge orientation, seal alignment, and gas-flow channel alignment during either top or bottom servicing. The indexing arrangements include housing top-to-body indexing and housing bottom-to-body indexing, together with filter cartridge-to-housing top indexing and filter cartridge-to-housing bottom indexing, and further filter cartridge-to-guide indexing. A non-circular guide/receiver geometry is described to force a single operative rotational orientation while maintaining drainage paths.

The disclosed cartridge structure includes filter media positioned between first and second opposite end members and surrounding an open filter interior. The first end member includes a member having an aperture therethrough and a seal member defining a non-circular seal perimeter. The second, opposite end member is closed and includes a closed receiver projection projecting toward the first end member at least 10% of a distance between opposite ends of the filter media, with the closed receiver projection having a non-circular inner cross-sectional shape.

Claims Coverage

The independent claim in clm-00001 covers four inventive features centered on filter cartridge geometry and orientation control.

The coverage centers on enforcing correct orientation and sealing by combining a non-circular seal perimeter at an apertured first end member with a closed receiver projection on the closed second end member that projects toward the first end member by at least 10% and has a non-circular inner cross-sectional shape.

Stated Advantages

Documented Applications

No documented applications found