Filter element with undulating seal

摘要

Provided is a filter element having an annular resilient sealing device having a bead that undulates axially back and forth for mating with a correspondingly undulating top surface of a base in a filter assembly. The undulating bead provides for a fluid tight seal while restricting relative rotation of the filter element relative to the base.

主权项

1. A filter element for a filter head having a standpipe assembly having a standpipe member that extends upwardly from a base having raised and recessed portions, the filter element including:
a ring of filtration media having a central axis and defining a central cavity, the ring of filtration media having a first end and a second end; a first end cap sealingly bonded to the first end of the ring of filtration media; a second end cap sealingly bonded to the second end of the ring of filtration media; a support core disposed in the central cavity of the ring of filtration media between the first and second end caps and interiorly supporting the ring of filtration media; and an annular resilient sealing device carried by the second end cap and bounding a central opening in the second end cap, the annular resilient sealing device having a plurality of axially outwardly raised portions circumferentially spaced apart by recessed portions, the raised portions and recessed portions protruding radially inwardly from an inner surface of the annular resilient sealing device, whereby when the filter element is assembled to the standpipe assembly, the raised portions on the filter element can mate with the recessed portions on the standpipe base thereby restricting relative rotation of the filter element relative to the standpipe base.