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AssigneeNelson Industries, Inc.
InventorsKent J. Kallsen, Tadeusz Jaroszczyk, Stephen L. Fallon, Z. Gerald Liu, Jerald J. Moy, Jeffrey S. Morgan, Michael J. Connor, Scott P. Heckel, Jon S. Wake
Estimating the term…
An open flow fluid filter has a pleated main filter element 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. The loop has a hollow interior extending along an axis. Fluid to be filtered flows through the main filter element from an upstream dirty side to a downstream clean side, and flows axially in the hollow interior. The main filter element has an axial flow passage extending along the axis and circumscribing the hollow interior and has a flow perimeter greater than the inner perimeter. A safety filter element downstream of the main filter element filters both the axial flow in the hollow interior and additional flow between the flow perimeter and the inner perimeter. A filter with additional flow is also provided.
A filter comprising a first closed loop filter element extending axially along an axis between distally opposite first and second axial ends, and a second closed loop filter element at said first axial end, wherein flow through said filter flows radially through said first filter element and axially through said second filter element, wherein said second filter element comprises a pleated filter element having a plurality of pleats extending axially between a first set of pleat tips at a first set of bend lines and a second set of pleat tips at a second set of bend lines, said first and second sets of bend lines extending radially.
A filter comprising a first closed loop filter element extending axially along an axis between distally opposite first and second axial ends, and a second closed loop filter element at said first axial end, wherein flow through said filter flows radially through said first filter element and axially through said second filter element, wherein:
A filter comprising first and second closed loop filter elements, said first filter element comprising a plurality of pleats extending between a first set of pleat tips at a first set of bend lines and a second set of pleat tips at a second set of bend lines, said second filter element comprising a plurality of pleats extending between a third set of pleat tips at a third set of bend lines and a fourth set of pleat tips at a fourth set of bend lines, said bend lines of said third and fourth sets being perpendicular to said bend lines of said first and second sets.
Dependencies are inferred from the claim text.