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US 7,008,467 B2Granted
Air cleaner and method of filtering
AssigneeDonaldson Company, Inc.
InventorsWilliam Joseph Krisko, Wayne R. W. Bishop, Steven Scott Gieseke, Carolyn J. Finnerty, David W. Nelson
Life of this patent
Estimating the term…
Abstract
A filter element, a safety element and fluid cleaner assembly. The fluid cleaner assembly generally includes a housing having a cover and a primary fluid cleaner section. The element generally includes a z-filter media, arranged in a straight through configuration, and an axial seal gasket positioned to extend continuously around an outer perimeter of the straight through flow construction. The fluid cleaner assembly can have a precleaner positioned therein. Methods of assembly and use are provided.
Claims21
An air cleaner comprising:
- (a) a housing including at least first and second portions;
- (b) a primary filter element operably installed within the housing;
- the primary filter element including a z-filter media construction having an inlet flow face and an outlet flow face;
- (i) the z-filter media construction including a plurality of flutes;
- 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 opposite curved ends joined by sides;
- (iii) the primary filter element including a seal member extending completely, peripherally around the z-filter media construction;
- (A) the seal member including first and second opposite sides and an outer annular surface;
- (B) the seal member being between the first and second portions of the housing to form an axial seal;
- (c) a precleaner upstream of the primary filter element;
- the precleaner including multiple centrifugal separators and an ejection tube;
- (i) each of the separators having a sidewall, an interior volume, and vanes within the interior volume;
- and
- (d) a safety element operably installed in the housing downstream of the primary filter element;
- (i) the safety element including a frame having an outer, surrounding band;
- a gasket mounted to the surrounding band;
- a region of pleated filter media within the frame;
- and a handle;
- (ii) the safety element having a cross-sectional configuration including a pair of opposite curved ends joined by sides.
18 more elements
An air cleaner comprising:
- (a) a housing including at least first and second portions;
- (b) a primary filter element operably installed within the housing;
- the primary filter element including a z-filter media construction having an inlet flow face and an outlet flow face;
- (i) the z-filter media construction including a plurality of flutes;
- 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;
- (i) the primary filter element including a seal member extending completely, peripherally around the z-filter media construction;
- (A) the seal member including first and second opposite sides and an outer annular surface;
- (B) the seal member being between the first and second portions of the housing to form an axial seal;
- (c) a precleaner upstream of the primary filter element;
- the precleaner including multiple centrifugal separators and an ejection tube;
- (i) each of the separators having a sidewall, an interior volume, and vanes within the interior volume;
- and
- (d) a safety element operably installed in the housing downstream of the primary filter element;
- (i) the safety element including a frame having an outer, surrounding band;
- a gasket mounted to the surrounding band;
- a region of pleated filter media within the frame;
- and a handle;
- (A) the gasket forming a seal with the housing.
17 more elements
A method of filtering comprising:
- (a) directing gas into a housing with a precleaner;
- the precleaner having centrifugal tubes causing the gas to rotate and particulate matter to be directed to a dust ejector tube;
- (b) directing the gas from the precleaner through an inlet face of a primary filter element and then through an outlet face of the primary filter element;
- (i) the primary filter element comprising z-filter media and having a cross-sectional configuration including a pair of opposite curved ends joined by sides;
- (ii) the z-filter media including a plurality of flutes;
- each of the flutes having an upstream portion adjacent to the inlet face and a downstream portion adjacent to the outlet face;
- (A) selected ones of said flutes being open at the upstream portion and closed at the downstream portion;
- and selected ones of the flutes being closed at the upstream portion and open at the downstream portion;
- (c) preventing gas from bypassing the primary filter element by an axial seal between the primary filter element and the housing;
- the axial seal being formed with a seal member extending completely, peripherally around the z-filter media;
- and
- (d) after flowing through the primary filter element, directing the gas through a safety element including pleated media.
9 more elements
Dependencies are inferred from the claim text.