Appeal No. 2001-2072
Application 08/910,885
a pleated paper filter media formed into a cylinder coaxial
about an axis in which the pleats define a cylindrical internal
bore within the filter media and a cylindrical outer periphery,
first and second end caps connected to the pleats at
respective axial ends of the filter media,
the filter cartridge having an intended flow path from a
higher pressure region at its outer periphery to a lower pressure
region at its internal bore,
the first end cap having associated therewith an elastomeric
radial seal gasket positioned at the out periphery to protect the
corresponding end cap from the higher pressure region at the
outer periphery of the filter cartridge, the radial seal gasket
having a sealing flange, the sealing flange including a sealing
surface with a diameter closely dimensioned to the outer diameter
of the axially extending seating surface such that the sealing
flange is adapted to be pressed radially inward toward the axis
into a sealing relationship against the axially extending seating
surface by said higher pressure,
the second end cap having associated therewith gasket means
for preventing the higher pressure in the region at the outer
periphery of the filter cartridge from being applied to the
outside end of said other end cap,
the end caps and pleats being adapted to accept a structural
supporting tube in a filter housing to assist the pleated paper
in withstanding pressure applied in a radial direction from the
outer periphery to the internal bore,
the gaskets associated with the respective end caps being
configured to communicate the lower pressure in the region at the
internal bore to the end caps to avoid the application of
crushing axial loads to the filter cartridge.
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Last modified: November 3, 2007