Patent ID: 7637976

Claim:
A filter insert for an air filter, said filter insert comprising at least one filter element and a seal element extending along outer edges of one side of the filter element; said seal serving to sealingly seat the filter insert against housing sections of a surrounding filter housing forming an air intake tract of an internal combustion engine, wherein the filter insert is configured in such a way that air can readily flow into or out of a structural space adjacent said one side of the filter element with a minimum pressure drop, and wherein the filter element is at least partially covered on the inflow and/or discharge side by a semi-permeable component which produces an at least partial equalization of the pressure distribution in an air stream flowing through the filter element, the semi-permeable component being accommodated in a frame having a coarse grid covering the entire filter surface, and a portion of the frame, disposed between the semi-permeable component and the filter element, supporting the surface of the filter element.