Cummins Filtration Ip, Inc.

Nelson Industries, Inc.

Fleetguard, Inc.

University of Minnesota

Christopher E Holm

Brian W Schwandt

Peter K Herman

Barry Mark Verdegan

Chirag D Parikh

Mark V Holzmann

Arun P Janakiraman

William C Haberkamp

Anthony Barreteau

Eric A Janikowski

Bradley A Smith

Mark T Wieczorek

Benjamin L Scheckel

Gerard Malgorn

Caryn J Kindkeppel

Thomas J Braun

Pathikrit T Banerjee

Scott W Schwartz

Michael J Connor

Roger L Zoch

Jerald J Moy

Scott P Heckel

Ken Tofsland

Saru Dawar

Gregory W Hoverson

Stephen L Fallon

Terry Shults

Brian K Wagner

Himani Deshpande

Scott Gerald Manke

Robert A Bannister

Frank Steven Bates

Kelly R Schmitz

Kurt M A Badeau

Jean-Luc Guichaoua

Emmanuel Page

Christopher Ward Macosko

Shiming Feng

Z Gerald Liu

Charles W Hawkins

Gérard Malgorn

Abhijit Shimpi

Tadeusz Jaroszczyk

Matthew Louison

Kelly Ann Detra

Gregory K Loken

Alain Olier

Huanling Liu

Ronan Corvec

Suryanarayanan Paneerselvam

Lee A Peck

Howard E Tews

Jeffrey A Fedorowicz

Benoit Le Roux

G Michael Gron, Jr

Zaifei Wang

Craig R Knauf

Steven R Sankbeil

Miao Li

Merwyn I Coutinho

Jeremiah Cupery

Bryan P Steffen

Yashpal Subedi

Buwa A Baldeh

Kyle Ellison

Jonathan D Sheumaker

Kan Wang

Budi Antony

Mike J Connor

Daniel Y Hodges

Kenneth M Tofsland

Daniel Potratz

Stephanie L Faber

Rohit Sharma

Clint T Deweese

Larry T Gunderson

Kwok-Lam Ng

C Raymond Cheng

Amit Shashikant Wankhede

Matthew T VandenBush

Ashwin K Koleshwar

Vijay Dinkar Kolhe

Raymond C Shute

Bharath Siddaramanna Onkarappa

Jason E Dorgan

Lawrence P Tracy

Orvin D Kendall

Mrinmayee Balasaheb Pokharkar

Nilesh Bhaskar Nagare

Glen Schneider

Jacek Bodasiński

Witalis Rumiński

Ryan W Rutzinski

Leon Gradoń

Zakir Ahmad Quabili

Ruchi Lutade

Michael B Lanius

Rajath Martin

Prashant Wani

Jean-Luc Goichaoua

Rotating coalescer elements that maximize the radial-projected separation surface area in a given (rotating) cylindrical volume, where flow to be cleaned is passing axially upward or downward through a separating media of the rotating coalescer element. Various example package assemblies are provided with various types of rotating configurations including cylindrical coiled media packs, frustum coiled media packs, concentric cylinders, coiled metal or polymer films with and without perforations, and/or alternating layers of different materials. The described rotating coalescers may be driven by hydraulic turbine, electric motor, belt, gear or by mounting on rotating machine components, such as rotating engine shafts or connected components.

Axial flow centrifugal separator

A filter media comprises a first fiber layer and a second fiber layer positioned downstream of the first fiber layer. The first fiber layer has a first geometric mean fiber diameter of less than 1 μm such that the geometric standard deviation of fiber diameter is greater than 2. The second fiber layer has a second geometric mean fiber diameter of less than 1 μm such that the geometric standard deviation of fiber diameter is less than 2.

Composite filter media with multiple fiber structures including nanofibers

An axial flow element for use in a liquid separation system for an internal combustion engine includes a hub, a groove, a locking member, and a flat layer. The hub includes a cylindrical outer surface. The groove is disposed in the outer surface. The groove extends in a substantially longitudinal direction along the hub from a first end of the hub to a second end of the hub. The locking member is disposed in the groove. The flat layer is disposed between the hub and the locking member.

Methods of attaching a flat layer to a hub of an axial flow element

A separation assembly comprises a housing and a plate. The housing comprises an inlet and an outlet. The plate is positioned within the housing between the inlet and the outlet. The plate comprises a wall, at least one aperture, and at least one chimney comprising an inner surface surrounding the at least one aperture and an outer surface. The chimney extends from an upstream side of the wall and encompasses only a portion of a flow path between the inlet and the upstream side of the wall such that fluid can flow radially beyond the outer surface of the at least one chimney in the housing between the inlet and the wall.

Chimney for impactor nozzles and integrated assembly

A rotating coalescer having an ejected coalesced liquid separating device is described. The separating device prevents re-entrainment of liquid into a stream of filtered gas. The rotating coalescer includes a rotating filter element or coalescing cone stack positioned within a rotating coalescer housing. The outer surface of the rotating filter element or the outlet of the coalescing cone stack is displaced from the inner surface of the rotating coalescer housing. The gap between the rotating filter element or the coalescing cone stack and the rotating coalescer housing allows for ejected coalesced liquid, such as oil, to accumulate on the inner surface of the rotating coalescer housing for drainage and allows for filtered gas, such as air, to exit through a clean gas outlet of the rotating coalescer housing.

Rotating coalescing element with directed liquid drainage and gas outlet

Rotating coalescer crankcase ventilation (CV) systems are described. The described CV systems utilize a pumping pressure created by the porous media of the rotating coalescer to maintain positive recirculation of filtered blowby gases through a potential leak gap between a static housing inlet and a spinning component of the rotating coalescer. In some arrangements, the porous media is fibrous media. The filter media may be pleated or non-pleated. The positive recirculation caused by the pressure balance prevents unfiltered blowby gases from bypassing the media of the rotating coalescer from the upstream side to the downstream side of the filter media through the gap. During operation, the pressure balance between the upstream side and downstream side of the filter media maintains the positive recirculation, which in turn maintains a high filtration efficiency.

Systems and methods for rotating coalescers maintaining positive recirculation through a dynamic seal

Filter media having a design embossed into the media are described. In some arrangements, the filter media is pleated filter media. In other arrangements, the filter media includes a plurality of channels, such as tetrahedron channels. The filter media includes a pattern of interrupted straight or angled embossments that help maintain separation between adjacent layers of the filter media. The embossments allow for two adjacent media layers (e.g., mating surfaces of the filter media) to remain separated, thereby increasing dust holding capacity and lowering pressure drop ever similarly configured filter media not having the embossments.

Interrupted, directional emboss of flat sheet

A filter assembly comprises a housing, a filter element for filtering a fluid and positionable within the housing, and an expansion membrane assembly. The expansion membrane assembly fluidly separates and is positionable between the housing and the filter element. The membrane assembly extends along an inner surface, a top surface, and an outer surface of the housing.

Expansion membrane assembly and filter head in exhaust fluid filter assembly

A filtration sealing system is provided for sealing a filter element in a housing at a mating interface therebetween. The sealing system includes a keyed interface. A replacement filter element is provided for such filtration sealing system, with the replacement filter element including a keyed interface.

Filtration sealing system

Filter media and media packs that provide robust performance in high-speed rotating coalescer (HSRC) elements for crankcase ventilation systems are described. The fiber media is HSRC fiber media. As such, the filter media has a higher resistance to compressibility then traditional coalescer filter media, such as fiber media used in low-speed rotating coalescer arrangements or stationary coalescer arrangements.

High speed rotating crankcase ventilation filter media and media pack

Referring to the figures generally, a rotating filter cartridge includes a first endcap, a second endcap, and a filter media. The filter media is positioned between the first endcap and the second endcap. The filter media creates a mechanical seal between at least one of the first endcap or the second endcap during rotation of the rotating filter cartridge without the use of a potting material. In at least one embodiment, the rotating filter cartridge further includes a body secured to the first endcap and the second endcap. At least one of the first endcap or the second endcap, and the body, may form a pocket that radially pinches the filter media to form the mechanical seal.

Utilizing a mechanical seal between a filter media and an endcap of a rotating filter cartridge

Various example embodiments relate to rotating coalescers. One embodiment includes a housing comprising a first housing section having a blowby gas inlet structured to receive crankcase blowby gases from a crankcase. The housing further comprises an oil outlet. The rotating coalescer includes an endcap and filter media. The filter media is arranged in a cylindrical shape and is coupled to and positioned between the first housing section and endcap. The filter media is structured to filter the crankcase blowby gases passing through the filter media by coalescing and separating oils and aerosols contained in the crankcase blowby gases. The rotating coalescer includes a hollow shaft extending through the housing and positioned radially inside of the filter media. The hollow shaft forms a blowby gas outlet structured to route filtered crankcase blowby gases out of the housing. The rotating coalescer further includes a drive mechanism operatively coupled to the hollow shaft.

Inside-out rotating coalescer with gas exit through hollow shaft

Growing community of inventors

Madison, WI, United States of America

Christopher E Holm