Patent ID: 7395936

Claim:
A filter element, comprising: a ring of filtration media circumscribing a central axis and defining a central cavity, the filtration media ring having a first end and a second end; a first, circular end cap having an inner surface sealingly bonded to the first end of the media ring, the first end cap including an annular body portion defining a central opening into the central cavity of the media, a sealing device bounding the central opening, a vent orifice in the annular body into the central cavity at a predetermined location, radially outward from the sealing device, and an orientation device permanently fixed to and integral with the first end cap and projecting radially outward therefrom; and a second, circular end cap sealingly bonded to the second end of the media ring, a retaining device fixed to and integral with the second end cap and projecting outwardly therefrom.