Patent ID: 8414675

Claim:
An air cleaner comprising: (a) a housing defining an interior and including an end outlet; (i) the housing including an end wall surrounding the end outlet; (ii) the housing including an annular housing seal surface surrounding the end wall; and (iii) the housing including a first ring projecting into the interior of the housing from the end wall; (A) the first ring being spaced from both the end outlet and the housing annular radial seal surface; and (b) an air filter cartridge removably positioned within the housing interior; the filter cartridge comprising: (i) a region of filter media surrounding and defining an open central interior; and, (ii) first and second end caps; (A) the media extending between the first and second end caps; (B) the first end cap being closed to flow of air therethrough; and, (C) the second end cap being an open end cap having an outer, annular, outwardly directed housing radial seal portion, an end surface and a groove; the end surface not being positioned in a groove in the end cap; and, (iii) the air filter cartridge being positioned with: (A) the first ring projecting against the end surface of the second end cap and not in the groove; and, (B) the housing radial seal portion of the second end cap radially sealed to the annular housing seal surface of the housing.