Hybrid spin-on filter

Details Hybrid spin-on filter Hybrid spin-on filter

2006-05-23

2006-05-23

Savage, Matthew O. (Department: 1724)

Liquid purification or separation

Flow, fluid pressure or material level, responsive

Discharge of treated material

C210S136000, C210S253000, C210S256000, C210S259000, C210S315000, C210S418000, C210S440000, C210SDIG013, C210SDIG017

Reexamination Certificate

active

07048848

ABSTRACT:
A hybrid oil filter assembly includes a housing and a first (e.g., conventional) oil filter element disposed in proximity to a bottom portion of the housing. The first oil filter element contains an open inner volume. A second oil filter element having a generally circular cylindrical shape is disposed circumferentially about a length of the first oil filter element. The second oil filter element may be made of rolled paper and filters particles of a smaller size than the first oil filter element (e.g., down to about one microns, thereby providing micro-filtering of the engine oil).

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