Patent ID: 7211124

Claim:
A removable and replaceable air filter element for use in an air cleaner; the filter element comprising: (a) a center board including an extension having: first and second, opposite ends; first and second side edges extending between the first and second ends; and, a system to help hold filter media to the center board and prevent slippage between the center board and filter media; (i) the system to help hold including a region located at least partially between the first and second ends; (A) the region including a bearing surface to help hold and secure the filter media; and, (B) the bearing surface including a first thickness and a second thickness different from the first thickness; (ii) the center board having a width between the first side edge and the second side edge of at least 50 mm and no greater than 500 mm; and, (iii) the center board having an overall thickness of at least 1 mm and no greater than 20 mm; and, (b) filter media oriented around, and secured to, the center board; (i) the filter media being configured for straight through flow and comprising a first fluted filter sheet secured to a second filter sheet and coiled around the center board into a coiled media construction having: an inlet face; an opposite outlet face; and, a plurality of flutes extending between the inlet and outlet faces; each of the flutes having a first end portion and a second end portion; selected ones of the flutes comprising inlet flutes open at an end portion adjacent the inlet face and closed at an end portion adjacent the outlet face; and selected ones of said flutes being outlet flutes closed at an end portion adjacent the inlet face and open at an end portion adjacent the outlet face; (ii) the filter media being secured to the bearing surface; (iii) the filter media and center board forming a filter element having a non-circular cross-section with opposite rounded ends; (iv) the centerboard including a handle member projecting outwardly from the inlet face of the coiled media construction; and, (v) the filter element being closed to passage of unfiltered air therethrough, without filtering passage through the media; and, (c) a seal system positioned on the media construction including a seal member positioned at a location for forming a seal with an air cleaner housing, in use.