Patent Number: 8,821,734

Title: Method for purifying oil and apparatus therefor

Abstract: An oil purifying liquid filter, having an annular ring element receiving space, wherein the ring element has two axial end disks, a cover selectively fastened to a housing to close the receiving space, an inlet that is formed within the housing on a crude side, an outlet that is formed within the housing on a pure side, a first additional opening that is formed within the housing, a second additional opening that is formed within the cover, a first closure that is formed on the first end disk of the filter element in order to close the first additional opening, and a second closure that is formed on the second end disk of the filter element to selectively close the second additional opening.

Inventors: Grass; Uwe (Stuttgart, DE), Schmid; Mike (Tubingen, DE), Widmaier; Andreas (Herrenberg, DE)

Assignee: Mahle International GmbH

International Classification: B01D 35/16 (20060101)

Expiration Date: 9/02/12018