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    • 8. 发明专利
    • AT222995T
    • 2002-09-15
    • AT98932842
    • 1998-06-25
    • DONALDSON CO INC
    • GIESEKE STEVEN SDUSHEK ROBERT A
    • B01D46/00B01D46/10B01D46/12B01D46/24B01D46/52F01M13/04
    • An arrangement for use in separating a hydrophobic liquid aerosol phase, from a gas stream, during filtration of engine crankcase gases by passage of the gases into a first stage coalescer filter and then into a pleated upstream surface of a second stage filter; said arrangement comprising: a first stage coalescer filter including a coalescer housing framework defining: a non-porous, outer peripheral wall with first and second, opposite, open ends and a flow passageway extending between the open ends; the first stage coalescer filter including a non-woven, non-pleated, fibrous bundle sealed in the coalescer housing framework and extending across the flow passageway; the non-woven fibrous bundle being positioned between an upstream open screen which extends across the first open end; and, a downstream open screen which extends across the second open end; the non-woven fibrous bundle having a first upstream surface area; and a second stage filter element comprising pleated media and having a pleated upstream surface for receiving gas flow from the first stage coalescer filter; the pleated upstream surface having a second upstream surface area; the first upstream surfaces are being within the range of 0.1 %-10% of the second upstream surface area.
    • 10. 发明专利
    • ES2182339T3
    • 2003-03-01
    • ES98932842
    • 1998-06-25
    • DONALDSON CO INC
    • GIESEKE STEVEN SDUSHEK ROBERT A
    • B01D46/00B01D46/10B01D46/12B01D46/24B01D46/52F01M13/04
    • An arrangement for use in separating a hydrophobic liquid aerosol phase, from a gas stream, during filtration of engine crankcase gases by passage of the gases into a first stage coalescer filter and then into a pleated upstream surface of a second stage filter; said arrangement comprising: a first stage coalescer filter including a coalescer housing framework defining: a non-porous, outer peripheral wall with first and second, opposite, open ends and a flow passageway extending between the open ends; the first stage coalescer filter including a non-woven, non-pleated, fibrous bundle sealed in the coalescer housing framework and extending across the flow passageway; the non-woven fibrous bundle being positioned between an upstream open screen which extends across the first open end; and, a downstream open screen which extends across the second open end; the non-woven fibrous bundle having a first upstream surface area; and a second stage filter element comprising pleated media and having a pleated upstream surface for receiving gas flow from the first stage coalescer filter; the pleated upstream surface having a second upstream surface area; the first upstream surfaces are being within the range of 0.1 %-10% of the second upstream surface area.