Patent ID: 8771518

Claim:
A method of filtering fluid in a first directional mode and in a second directional mode, the method comprising: selectively transporting fluid through porous adsorbent material in a filter chamber of a filter housing unit of a filter unit to establish a first flow pattern in at least a first direction in the first directional mode to filter the fluid selectively transported in the at least first direction; selectively transporting fluid through the porous adsorbent material in the filter chamber to establish a second flow pattern in at least a second direction in the second directional mode to filter the fluid selectively transported in the second direction such that the at least first direction is different than the at least second direction; selectively transporting fluid to a first port of the filter unit and subsequently from a second port of the filter unit in the first directional mode; and selectively transporting fluid to the second port and subsequently from the first port in the second directional mode such that the fluid includes carrier oil.