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US 6,261,334 B1Granted
High flow capacity filter
AssigneeNelson Industries, Inc.
InventorsJeffrey S. Morgan, Jon S. Wake, Kent J. Kallsen
Life of this patent
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AssigneeNelson Industries, Inc.
InventorsJeffrey S. Morgan, Jon S. Wake, Kent J. Kallsen
Estimating the term…
A filter element (202, 250) includes pleated filter media (26) having a plurality of pleats (28) in a closed annular loop having an outer perimeter (30) defined by a plurality of outer pleat tips (32), an inner perimeter (34) defined by a plurality of inner pleat tips (36), the loop having a hollow interior (38) extending along an axis (40), wherein fluid to be filtered flows laterally through the filter media and flows axially in the hollow interior (38). The filter element has an axial flow passage (56a) along the axis (40) and circumscribing the hollow interior (38) and has a flow perimeter (218) greater than the inner perimeter (34) of the filter element defined by the inner pleat tips (36), and in the preferred embodiment substantially the same as the outer perimeter (30) defined by the outer pleat tips (32), to provide axial flow (58) through the hollow interior (38) and additional axial flow (59 and 59a) through the axial ends (68) of the pleats.
A filter element comprising pleated filter media having a plurality of pleats in a closed loop having an outer perimeter defined by a plurality of outer pleat tips, and an inner perimeter defined by a plurality of inner pleat tips, said loop having a hollow interior extending along a given axis, wherein fluid to be filtered flows laterally through said filter media, and flows axially in said hollow interior, said filter element having an axial flow passage extending along said axis and circumscribing said hollow interior and having a flow perimeter greater than said inner perimeter, said filter element having first and second axial ends, said first axial end being open and providing said axial flow passage therethrough, and an end cap around said outer pleat tips at said first axial end and having an outer perimeter greater than said outer perimeter of said outer pleat tips and forming an outer sealing surface external to said axial flow passage.
Dependencies are inferred from the claim text.