Patent ID: 7491254

Claim:
An air cleaner comprising: (a) a housing; (b) a primary filter element operably installed within the housing; the primary filter element including a media construction having an inlet flow face and an outlet flow face and comprising a first facing media sheet secured to a second media sheet and coiled to form a plurality of flutes extending between the inlet and outlet flow faces; (i) each of said flutes having an upstream portion adjacent to said inlet flow face and a downstream portion adjacent to said outlet flow face; (A) selected ones of said flutes being open at said upstream portion and closed at said downstream portion; and selected ones of said flutes being closed at said upstream portion and open at said downstream portion; (ii) the primary filter element having a cross-sectional configuration including a pair of spaced opposite curved ends; (iii) the primary filter element including an axial seal member extending completely peripherally around the media construction and axially sealed to a portion of the housing; (A) the seal member including first and second opposite sides and an outer annular surface; the first and second opposite sides of the seal member being compressed axially toward one another in sealing the primary filter element to the housing; and, (B) the seal member defining a shape having a cross-sectional configuration of spaced opposite curved ends; (c) a precleaner upstream of the primary filter element; the precleaner including multiple centrifugal separators and an ejection tube; and, (d) a safety element operably installed in the housing downstream of the primary filter element; (i) the safety element including: a frame; a gasket mounted around the frame; and, a region of pleated filter media within the frame, and, (ii) the safety element having a cross-sectional configuration including a pair of opposite curved ends joined by sides.