Patent ID: 6378706
Filing Date: 2002-04-30
Classification: B01D

Abstract:
A filter for filtering fluid from a machine, comprising:a filter housing having a first inlet receiving a first fluid from said machine, a first outlet returning said first fluid to said machine, a second inlet selectively receiving a second fluid from a source of cleaning fluid, and a second outlet exhausting said second fluid; a filter element in said filter housing; said filter housing having a first flow path therethrough from said first inlet then through said filter element in one direction then to said first outlet; said filter housing having a second flow path therethrough from said second inlet then through said filter element in the opposite direction then to said second outlet, said first and second flow paths having common but opposite direction portions through said filter element; said filter housing having a first common flow channel communicating with said first inlet and said second outlet; said filter housing having a second common flow channel communicating with said first outlet and said second inlet; said filter element further comprising: a first valve in said housing having a first state closing said second outlet, and having a second state opening said second outlet; a second valve in said housing having a first state providing communication of said first fluid through said filter element to said first outlet, and having a second state providing communication of said second fluid from said second inlet through said filter element and out to said second outlet.