Patent ID: 8236176

Claim:
A filter cartridge for installation in a housing having a housing seat with a particular keyed pattern of axially projecting pedestals; wherein: the filter cartridge includes a filtration media compiled in a cylindrical pack having a radially outer face, a radially inner face defining a central bore, a first axial end face, and a second axial end face; the filter cartridge also including an end cap comprising a brim portion, a crown portion, and pockets that open into an axial side of the crown portion; the second axial face of the filtration media is bonded and sealed to an axial end of the brim portion; radially inner surfaces of the brim portion and the crown portion form a central passage that communicates with the central bore of the filtration media; and the pockets are shaped, sized, and situated for full insertion of the pedestals in the housing seat, wherein the crown portion includes a radially outer apron radially outwardly disposed with respect to the central passage of the crown portion, and wherein the pedestal-insertion pockets are located radially inwardly of the apron and the apron has a radially outwardly facing groove, and a seal is disposed in the groove for sealing the end cap to the housing seat.