March 18, 2016 - 12:46 AM EDT
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"Air Filtration Cartridges Having Air Flow Rectification and Methods of Making Air Filtration Cartridges Having Air Flow Rectification" in Patent...

"Air Filtration Cartridges Having Air Flow Rectification and Methods of Making Air Filtration Cartridges Having Air Flow Rectification" in Patent Application Approval Process (USPTO 20160059171)

By a News Reporter-Staff News Editor at Politics & Government Week -- A patent application by the inventor Lukasavitz, John C. (

Flushing, MI
), filed on April 17, 2014, was made available online on March 10, 2016, according to news reporting originating from
Washington, D.C.
, by VerticalNews correspondents.

This patent application is assigned to Cummins Filtration Ip, Inc.

The following quote was obtained by the news editors from the background information supplied by the inventors: "Internal combustion engines generally combust a mixture of fuel (e.g., gasoline, diesel, natural gas, etc.) and air. Prior to entering the engine, the air is typically passed through an air filtration system. A mass air flow (MAF) sensor is placed downstream of the air filter (i.e., on the clean side of the air filter media) and provides feedback to an engine control module (ECM). However, the air flow exiting the filter element may be inconsistent resulting in high variation of the MAF sensor to the ECM. Additionally, the orifice of the air filtration system that feeds the MAF sensor may cause a high pressure loss across the MAF sensor, thereby further reducing the accuracy of the MAF sensor output provided to the ECM.

"

U.S.
Pat. No. 7,905,153, which is incorporated herein by reference in entirety, discloses a flow vortex suppression apparatus for use in an air intake duct having a MAF sensor. The flow vortex suppression apparatus includes an air flow permeable fibrous vortex dispersive media installed into the air duct in a position upstream of the MAF sensor and configured to occlude the air duct such that air flow in the duct is constrained to pass through the vortex dispersive media. The vortex dispersive media is configured and adapted to diffuse vortices and reduce air turbulence of an air stream entering the MAF sensor, thereby reducing variations and noise in a flow measurement signal from the mass air flow sensor.

"

U.S.
Pat. No. 7,600,436, which is incorporated herein by reference in entirety, discloses a measuring system that is inserted into the course of a process line and serves for registering at least one measured variable of a medium flowing in the process line. The measuring system includes for such purpose a measuring transducer having a measuring tube serving for conveying medium being measured and a sensor arrangement, which has at least one sensor element reacting primarily to the measured variable to be registered, and which delivers by means of at least one sensor element at least one measurement signal influenced by the measured variable.

"

U.S.
Pat. No. 7,497,301, which is incorporated herein by reference in entirety, discloses an acoustic silencer provided by a tubular member extending along an axis and having a hollow interior defining an axial flow path therethrough. The tubular member has a sidewall with an interior face facing the hollow interior and having quarter wave resonators formed by blind holes therein.

"

U.S.
Pat. No. 7,377,954, which is incorporated herein by reference in entirety, discloses an air filtration cartridge with annular filter media having a hollow interior and extending axially between first and second distally opposite end caps. The first end cap is an outlet end cap having flow straightening structure integrally formed therewith and spanning the hollow interior. The second end cap is a closed end cap having an interior face having quarter wave resonators formed by blind holes therein.

"

U.S.
Pat. No. 6,655,207, which is incorporated herein by reference in entirety, discloses an integrated module for measuring a flow rate of a fluid, whether gaseous or liquid, with a flow restrictor comprising a plurality of orifices adapted to a flow channel of the integrated module and a sensor mounted to measure a property of the fluid at said flow restrictor corresponding to the flow rate. The integrated module provided may be used in numerous flow systems, such as reactors, ventilators and respirators, and has the benefit of better laminarization of the flow as well as better calibration between the flow sensor and the flow restrictor for more accurate flow measurements.

"

U.S.
Pat. No. 6,267,006, which is incorporated herein by reference in entirety, discloses an air induction assembly disposed in an intake passage through which air flows to an engine. The air induction assembly has a conduit member which defines an air flow path. A MAF sensor is located in the intermediate conduit portion and is in fluid communication with the air flow path. The MAF sensor is operative to generate an output signal corresponding to air flow rate within the intermediate conduit portion. A plurality of flow conditioning elements (FCEs) in the airflow path produces a uniform airflow with low turbulent fluctuations to the MAF sensor under all vehicle and engine speeds without excessively restricting the air flowing to the engine.

"

U.S.
Pat. No. 6,199,434, which is incorporated herein by reference in entirety, discloses a device for metering the volume of gas flowing in a pipe, downstream from an expander-regulator, comprising in succession a flow straightener, a velocity-measuring flowmeter, and a silent flowrate limiter. The straightener comprises a support ring in which there are mounted a first perforated plate having holes distributed over its surface, together with a first porous plate and a spacer in the form of an annulus co-operating with the first perforated plate. The limiter comprises an upstream web defining a second perforated plate perforated by a defined number of calibrated holes, the total flow section thereof being much less than the total flow section of the first perforated plate, a second perforated plate, and a downstream web defining a third perforated plate having holes of total flow section that is much greater than the total flow section of the second perforated plate of the upstream web.

"

U.S.
Patent Application Publication No. 2005/0087012 discloses a mass tube for a MAF sensor comprising a metal grid acting as a flow rectifier arranged perpendicular to the air flow. At least two fixing elements are arranged on the measuring tube, said elements extending inwards in a radial manner, whereon the metal grid is fixed by pre-tensioning."

In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventor's summary information for this patent application: "This Summary is provided to introduce a selection of concepts that are further described below in the Detailed Description. This Summary is not intended to identify key or essential features of the claimed subject matter, nor is it intended to be used as an aid in limiting the scope of the claimed subject matter.

"A first embodiment relates to an air cleaner. The air cleaner includes a housing having an air inlet and an air outlet. The air cleaner further includes a filter media coupled to the housing and positioned between the air inlet and the air outlet, the filter media configured to filter an air flow that enters the housing through the air inlet and exits the housing through the air outlet. The air cleaner includes a rectifier coupled to the housing and positioned at a location downstream of the filter media, the rectifier including an outer ring that is orthogonally oriented with respect to the air flow.

"Another embodiment relates to an air flow rectifier that rectifies air flow at a location downstream of filter media. The air flow rectifier includes concentric inner and outer rings that are spaced apart from each other so that an annular gap exists between the inner and outer rings. The inner ring defines an open interior and wherein the inner ring has a plurality of through-holes that are spaced apart from each other around the circumference of the inner ring.

"A further embodiment relates to a method of assembling an air cleaner. The method includes providing an air filtration cartridge comprising a filter media that filters an air flow from an upstream inlet to a downstream outlet. The method further includes providing a mass airflow sensor downstream of the filter media for sensing a characteristic of the air flow. The method includes providing a rectifier between the filter media and the airflow sensor, the rectifier for rectifying the air flow downstream of the filter media. The method further includes configuring the rectifier so as to modify the characteristic of the air flow and produce a predetermined output from the mass airflow sensor.

"These and other features, together with the organization and manner of operation thereof, will become apparent from the following detailed description when taken in conjunction with the accompanying drawings, wherein like elements have like numerals throughout the several drawings described below.

BRIEF DESCRIPTION OF THE FIGURES

"FIG. 1 shows a perspective partial cutout view of an air cleaner according to an exemplary embodiment.

"FIG. 2 shows a side partial cutout view of the air cleaner of FIG. 2.

"FIG. 3 shows a cross sectional view of the air cleaner of FIG. 1 having an off center mass air flow sensor.

"FIG. 4 shows a front view of an air flow rectification device according to an exemplary embodiment.

"FIG. 5 shows a front view of an air flow rectification device according to another exemplary embodiment.

"FIG. 6 shows a perspective view of the air flow rectification device of FIG. 5.

"FIG. 7 shows a flow diagram of a method of assembling an air cleaner according to an exemplary embodiment.

"FIG. 8 shows a front view of an air flow system according to an exemplary embodiment.

"FIG. 9 shows a front view of an air flow system device according to another exemplary embodiment.

"FIG. 10 shows a perspective view of an air flow system according to an exemplary embodiment.

"FIG. 11 shows a front view of the air flow rectification device of FIG. 10.

"FIG. 12 shows a perspective view of an air flow rectification device according to another exemplary embodiment."

URL and more information on this patent application, see: Lukasavitz, John C. Air Filtration Cartridges Having Air Flow Rectification and Methods of Making Air Filtration Cartridges Having Air Flow Rectification. Filed April 17, 2014 and posted March 10, 2016. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=7324&p=147&f=G&l=50&d=PG01&S1=20160303.PD.&OS=PD/20160303&RS=PD/20160303

Keywords for this news article include: Cummins Filtration Ip Inc.

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