Donaldson Comapny, Inc.

Marty A Barris

Steven Scott Gieseke

Paul R Coulonvaux

Thomas G Miller

Jian Xu

Johan Fobe

Cary Donald Olson

Johan G Dewit

Wayne RW Bishop

A precleaner arrangement for use in separating a portion of entrained material in air from air entering an air cleaner, is provided. The precleaner arrangement includes a vane structure positioned to direct air into a circular or cyclonic pattern, to facilitate material separation. The vane structure includes one or more adjustable air deflection vanes. Each adjustable air deflection vane is constructed: to have a first position under no air flow or low air flow rate conditions; and, to deflect to import a more open, lower restriction, orientation under increased air flow rates. Preferred precleaner arrangement constructions, assemblies utilizing in the precleaner arrangement and methods are described.

Precleaner arrangement for use in air filtration; method; and, air cleaner using same

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Overijse, Belgium

Marty A Barris