Patent ID: 8545588

Claim:
An air filter cartridge for removable installation in a housing having a first section and another housing piece with a joint therebetween; the air filter cartridge comprising: (a) a media pack comprising media surrounding an open interior; the media having first and second ends; (b) a first end cap positioned on the media first end; (i) the first end cap having a central aperture therethrough; (ii) the first end cap having a first seal portion oriented to form a first, radially outwardly directed, releasable radial seal with the housing section (iii) the first end cap having a second radial seal portion oriented to form a second, radially outwardly directed, seal with the housing at an opposite side of the joint from the first releasable radial seal; and, (iv) the first and second, radially outwardly directed, seal portions being configured to form seals that differ from one another, in largest cross-dimension, by at least 2 mm; the first seal portion having a larger cross-dimension, than any portion of the second seal portion; (v) the first seal portion being at a perimeter of the first end cap; (vi) the first end cap having a receiver groove therein, in overlap with a portion of the media pack, the receiver groove being more than 1 mm deep; and, (vii) the filter cartridge having no structure thereon that is both located adjacent the first end cap and that has a larger cross-dimension than the cross-dimension of the first seal portion; and, (c) a second end cap positioned on the media second end; the second end cap being a closed end cap.