| US 7,491,254 B2 | ||
| Filter elements; air cleaner; assembly; and, methods | ||
| William Joseph Krisko, Bloomington, Minn. (US); Wayne R. W. Bishop, St. Louis Park, Minn. (US); Steven Scott Gieseke, Richfield, Minn. (US); Carolyn J. Finnerty, Bloomington, Minn. (US); and David W. Nelson, Coon Rapids, Minn. (US) | ||
| Assigned to Donaldson Company, Inc., Minneapolis, Minn. (US) | ||
| Filed on Feb. 02, 2006, as Appl. No. 11/275,906. | ||
| Application 11/275906 is a continuation of application No. 10/925685, filed on Aug. 24, 2004, granted, now 7,008,467. | ||
| Application 10/925685 is a continuation of application No. 10/405432, filed on Apr. 02, 2003, granted, now 6,966,940. | ||
| Claims priority of provisional application 60/426071, filed on Nov. 12, 2002. | ||
| Claims priority of provisional application 60/370438, filed on Apr. 04, 2002. | ||
| Prior Publication US 2006/0101795 A1, May 18, 2006 | ||
| Int. Cl. B01D 45/12 (2006.01); B01D 50/00 (2006.01) | ||
| U.S. Cl. 55—337 [55/346; 55/348; 55/385.3; 55/482; 55/492; 55/502; 55/521] | 13 Claims |
| 1. 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.
|