Nelson Industries, Inc.

Cummins Filtration Ip, Inc.

Fleetguard, Inc.

Stephen L Fallon

Jeffrey S Morgan

Tadeusz Jaroszczyk

Kent Jeffrey Kallsen

Barry Mark Verdegan

Scott W Schwartz

Robert A Bannister

Gregory K Loken

Jeffrey A Rech

Joel D Roltgen

Z Gerald Liu

Michael J Connor

Scott P Heckel

Christopher E Holm

Brian W Schwandt

Jerald J Moy

Jon S Wake

Brian K Wagner

Jason E Dorgan

Larry T Gunderson

Byron Andrew Pardue

James Alan Debilzen

Brad Henke

Peter K Herman

William C Haberkamp

Chad M Thomas

Roger L Zoch

Mark J Johnson

Harold R Martin

Kelly R Schmitz

Kelly Ann Detra

Carey A Curt

Jason A Scherck

Kenneth M Tofsland

David M Stehouwer

Michael A Protasiewicz

Daniel R Cady

Douglas K Benham

Brian K Schwandt

Jeff Morgan

Thomas P Sonsalla

A filter element comprising a filter media and an outer surface. The filter media is formed in a closed loop, the closed loop defining a hollow interior extending along a longitudinal axis between a first end of the filter media and a second end of the filter media. The outer surface surrounds a perimeter of the filter element and is defined by a substantially circular first portion and at least one second portion. The first portion is substantially circular at a selected height of the filter media, and the at least one second portion is depressed relative to a circle defined by the substantially circular first portion at the selected height.

Filter element with depressed side portion

Filter element

An inertial separation air precleaner system includes a replaceable insert removably mounted to the precleaner and altering air flow velocity through the precleaner by changing flow area of the flowpath through the precleaner housing. The replaceable insert is replaceable with a different insert for the same precleaner housing, which different insert provides a different flow area through the precleaner housing, enabling a selectable precleaner efficiency vs. restriction trade-off as chosen by a user for a particular application, enabling tuning of precleaner performance by the user.

Cost-effective tunable precleaner

A parallel flow filter-in-filter design for a filter system is provided. The filter-in-filter design provides two distinctly parallel or independent flow paths within a filter assembly in a single housing or shell. The filter assembly includes a first outer filter element radially spaced apart from a second inner filter element. A centertube and a funnel shaped passageway housed within the centertube are provided in a space between the first outer filter element and the second inner filter element. The centertube and funnel shaped passageway work in tandem to provide two distinct parallel or independent flow paths within the filter assembly. The funnel shaped passageway is provided generally below the second inner filter element within the centertube.

Filter-in-filter with funnel shaped passageway

Disclosed are sealing apparatuses having a sealing gland for an O-ring, the sealing gland comprising a primary gland and an auxiliary gland located below the primary gland. The apparatuses may be utilized for filter cartridges in filter systems.

Auxiliary O-ring gland

A separation assembly is generally described that can chemically treat condensate material in a fluid stream. One particular example of a separation assembly is a crankcase filtration assembly used in engine oil filtration and that includes an additive material disposed within the crankcase filtration assembly. The additive material chemically treats condensate material of blow-by fluids received by the crankcase filtration assembly when a condition is present in the condensate material. For example, the crankcase filtration assembly provides a unique structure with a chemically treated component that can reduce an acidic condition in condensate material received by the crankcase filtration assembly, and even more generally may extend engine oil life.

Crankcase filtration assembly with additive for treating condensate material

High performance filter media and manufacturing methodology provides nanofibers of diameter less than 1 &#x3bc;m incorporated and processed into internal structure of a filter medium dominantly composed of coarse fibers of diameter greater than 1 &#x3bc;m, to change the internal media structure.

High performance filter media with internal nanofiber structure and manufacturing methodology

A high performance, high efficiency filter is provided by a multi-stage filter having combinations of tribologically different fibers, nanofibers, and layering.

High performance, high efficiency filter

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.

Additional flow filter

A filter filters fluid flowing along an axial flow direction and includes a plurality of concentric cylindrical pleated filter elements having a common axis. A plurality of annular radial gaps between filter elements provide additional flow axially through the filter, providing equalized flow and reducing restriction. In further embodiments, a central filter element is concentrically surrounded by a cylindrical pleated outer filter element and provides additional flow axially therethrough.

Multi-element cylindrical filter with equalized flow

A filter ( ) filters fluid flowing along an axial flow direction ( ) and includes a plurality of panels ( ) of pleated filter elements ( ), each filter element having a plurality of pleats defined by wall segments ( ) extending along a transverse direction ( ) between first and second sets of pleat tips at first and second sets of axially extending bend lines ( ), the transverse direction ( ) being perpendicular to the axial direction ( ). Each of the panels ( ) extends along a lateral direction ( ) perpendicular to the axial direction ( ) and perpendicular to the transverse direction ( ). The wall segments ( ) extend axially between upstream and downstream ends ( ), and define axial flow channels ( ) therebetween which are alternately sealed at the upstream and downstream ends. Transverse gaps ( ) are provided between panels and the housing at upstream and downstream ends ( ), providing additional fluid flow axially therethrough and equalized contaminant passages.

Multi-panel fluid filter with equalized contaminant passages

Open flow filter with safety element

Growing community of inventors

Oregon, WI, United States of America

Stephen L Fallon