| 摘要 |
A replaceable filter element for use with a filter assembly having a housing with a cover and a support core therein. The filter element has a ring of filtration media and an end cap at each end sealingly bonded to the filtration media. The second end cap has a central opening along the central axis of the filter element for receiving the support core. The first end cap also has a central opening along the central axis of the filter element. The central opening of the first end cap has a smaller diameter than the central opening of the second end cap. The central opening of first end cap is bounded by an annular flange integral with the first end cap and projecting axially inward a short distance from the first end cap toward the second end cap and terminating at a point closer to the first end cap than the second end cap. The annular flange is spaced radially inward from the ring of filtration media. A protrusion is located radially between the annular flange and the ring of filtration media, The protrusion is affixed to said first end cap and projects axially inward from the first end cap a short distance toward the second end cap, and remaining with the filter element when the filter element is removed from the housing. The first end cap includes a second annular flange radially outward from the protrusion for engaging with the support core. The second annular flange includes tapered gussets for properly orienting the end cap and the protrusion thereon for reliable interaction with the extension and locking mechanism in the support core when the filter element is assembled in the housing.
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