A filter system, in particular for filtering the lubricant of an internal combustion engine, having at least two filter elements (19, 25) which can be connected successively to the oil circuit and a changeover valve (21) which feeds the oil to be cleaned to one of the filter elements, with the valve...http://www.google.fr/patents/US6126818?utm_source=gb-gplus-shareBrevet US6126818 - Filter system for the lubricant of an internal combustion engine
Filter system for the lubricant of an internal combustion engine
