Filter Endplate Having Variable Hardness

摘要

A filter cartridge having an endplate formed of polyurethane having a varying hardness is described. A first portion of the endplate is harder than a second portion of the endplate. The first portion of the endplate helps support the filter media of the filter element and maintain the shape of the filter element. The second, softer portion creates a seal between the filter element and a filter housing when the filter element is installed in the filter housing. The first portion and separate portions may be formed from different types of polyurethane or from the same type of polyurethane having a varying composition as a function of the radial distance of the endplate.

主权项

1. A filter cartridge, comprising:
a filter media; a first endplate secured to the filter media and sealing a clean side of the filter media from a dirty side of the filter media; and a second endplate secured to the filter media and sealing the clean side of the filter media from the dirty side of the filter media, the second endplate including a hard section and a compressible section, the hard section having a first hardness, the compressible section having a second hardness, the first hardness being greater than the second hardness, the compressible section configured to provide a sealing surface between the second endplate and a component of a filtration system when the filter cartridge is installed in the filtration system.