Patent ID: 8852309

Claim:
An air filter cartridge installable in use in an air cleaner housing having an access cover; the filter cartridge comprising: (a) first and second, opposite, end caps: (i) the first end cap having an air flow exit aperture therethrough; and, (ii) the second end cap being closed; (b) pleated filter media extending between the first and second end caps and surrounding and defining an open filter interior; (c) the first end cap including a seal member molded-in-place as a portion of the first end cap; and, (d) the second end cap including a first receiver of a projection/receiver arrangement thereon positioned centrally on the second end cap and projecting into the open filter interior; the receiver surrounding a space defining an open receiver center facing a direction away from the first end cap and having a non-circular shape in cross-section in a plane perpendicular to the open filter interior and a direction between the first end cap and the second end cap.