Abstract: A core construction for use in a filter element includes a tubular member having a wall with opposite first and second ends. The first end is adaptable for engagement with structure, such as a frame utilized with a filter element. The second end is also engageable with external structure, such as a handle. Preferably, a filter element is constructed by rolling a media construction around the core construction. The media construction includes a corrugated sheet secured to a flat sheet rolled around the core construction into a coiled construction. The coiled construction has inlet flutes and outlet flutes. Methods for using and assembling filter elements preferably use core constructions as described herein.

Abstract: A filter element is provided comprising a media construction comprising a corrugated sheet secured to a flat sheet rolled into a coiled construction. The filter element includes a mounting flange secured to the coiled construction. The mounting flange projects radially from the outer, annular surface of the coiled construction. The mounting flange defines at least one fastener socket to allow for axial mounting of the filter element into a housing. An air cleaner includes a housing with filter elements, as described herein, operably installed within. Preferably, the filter element is sealed within suitable housings with a seal, such as a radially directed seal. Preferably, the filter element is secured to the housing by axial mounting of the mounting flange to the housing using fasteners. Methods for installing, assembling, using, and servicing are provided herein.

Abstract: A filter arrangement includes a filter element, a frame construction secured to the filter element, and a handle member secured to the filter element. In preferred embodiments, the handle member is secured to the frame construction. Preferably, the filter element includes a central core member, wherein fluted filter media is coiled around the central core member. Preferably, the central core member includes a plurality of corrugations, wherein the corrugations mateably engage at least some flutes. Preferably, the handle member is integral with the central core member, and also includes a fastening member for connection to a frame construction on the filter element. Methods for cleaning air and servicing an air cleaner preferably include constructions as described herein.

Abstract: A filter arrangement includes a filter element, a frame construction secured to the filter element, and a handle member secured to the filter element. In preferred embodiments, the handle member is secured to the frame construction. Preferably, the filter element includes a central core member, wherein fluted filter media is coiled around the central core member. Preferably, the central core member includes a plurality of corrugations, wherein the corrugations mateably engage at least some flutes. Preferably, the handle member is integral with the central core member, and also includes a fastening member for connection to a frame construction on the filter element. Methods for cleaning air and servicing an air cleaner preferably include constructions as described herein.

Abstract: An air cleaner includes a housing having first and second opposite ends. A media pack is preferably oriented within the interior volume of the housing. In preferred embodiments, the media pack will have a first and second opposite flow face and be constructed and arranged for air to flow into the media pack through the first flow face, and for air to exit the media pack through the second flow face. The air cleaner will include a seal member forming a seal between the media pack and the housing. In preferred constructions, a secondary filter element is oriented within the interior volume of the housing. In some preferred embodiments, the housing is constructed and arranged as a resonator. Certain embodiments include a seal construction that engages the secondary filter element. Methods of filtering systems, servicing filtration systems, and constructing filter arrangements and housings will use filter elements and constructions as characterized above.

Abstract: A filter element includes a frame construction and a region of media held by the frame construction. The region of media is oriented within the frame construction to remove at least some particulates from a gas stream passing therethrough. The region of media includes a skirted portion, wherein the skirted portion occupies a volume between the frame construction and a sealing surface of a duct, when the filter element is mounted within a duct. In preferred systems, the filter element may be used as a secondary element in the duct of an engine air intake or in a duct of an air cleaner housing. Methods of using and servicing filter elements are described herein.

Abstract: An air cleaner includes a housing having first and second opposite ends. A media pack is preferably oriented within the interior volume of the housing. In preferred embodiments, the media pack will have a first and second opposite flow face and be constructed and arranged for air to flow into the media pack through the first flow face, and for air to exit the media pack through the second flow face. The air cleaner will include a seal member forming a seal between the media pack and the housing. In preferred constructions, a secondary filter element is oriented within the interior volume of the housing. In some preferred embodiments, the housing is constructed and arranged as a resonator. Certain embodiments include a seal construction that engages the secondary filter element. Methods of filtering systems, servicing filtration systems, and constructing filter arrangements and housings will use filter elements and constructions as characterized above.