Total Flow Of Gaseous Fluid Mixture Through Interstitial Or Porous Collector Patents (Class 96/66)
  • Patent number: 10307703
    Abstract: An air filter housing includes an air inlet opening, an air outlet opening, and at least four filter bays each of which is configured to receive and hold a filter. The at least four filter bays form a V shape in the air filter housing and each side of the V shape includes at least two of the at least four filter bays. The air filter housing can be used in an air filtration system such as a residential HVAC system to achieve a MERV 16 filtration rating.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: June 4, 2019
    Inventor: Daniel M. Dearden
  • Patent number: 10143952
    Abstract: A filter frame provided in the present invention comprises a frame body including a plurality of frame strips which are combined together to form filter net disposing area, a filter net fixing member, an upper circumferential surface connecting member, a lower circumferential surface connecting member, and an adjacent member. The upper circumferential surface connecting member and the lower circumferential surface connecting member are respectively disposed along the upper circumferential surfaces and the lower circumferential surfaces of the frame strips in such a manner that the filter frame is connected to a second filter frame and/or a third filter frame along the normal direction of the filter net disposing area. The adjacent member is disposed along the outer circumferential surface of the frame strip to form an adjacent channel extending along the frame strip in such a manner that the filter frame is adjacently connected to a fourth filter frame.
    Type: Grant
    Filed: September 2, 2016
    Date of Patent: December 4, 2018
    Assignee: GREENFILTEC PTE. LTD.
    Inventor: Ming-Wen Huang
  • Patent number: 10099225
    Abstract: An air cleaning device for separating airborne particles from a flow of air is provided. The air cleaning device comprises a separating unit and an ionizing unit arranged to charge airborne particles present in the flow of air and transmit at least a major part of the charged particles towards the separating unit. The ionizing unit comprises at least one collector electrode and at least one emitter electrode. The separating unit is arranged to attract at least some of the charged particles so as to separate them from the flow of air. Further, the at least one collector electrode is shaped so as to conduct at least a portion of the flow of air and has a spherically curved inner surface and the emitter electrode is centered with respect to the spherically curved inner surface of the collector electrode.
    Type: Grant
    Filed: May 10, 2016
    Date of Patent: October 16, 2018
    Assignee: BLUEAIR AB
    Inventor: Johan Wennerstrom
  • Patent number: 9416968
    Abstract: An energy-saving dust collector includes a dust collection device (8) connected to a flue (1) and a fume afterheat recycling device (2) installed in the flue in the front of the dust collection device. The fume afterheat recycling device includes a heat exchanger. The heat exchanger includes a heat suction section (7) and a heat radiating section (3) connected with the heat suction section. The heat suction section is installed at a smoke inlet of the dust collection device, and the radiating section is connected with a condensation water tube. The energy-saving dust collector can reduce temperature of the smoke, improve dust collection efficiency, prevent the collector from corrosion of acid dew and prolong the service life of the collector.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: August 16, 2016
    Assignee: SHANGHAI FUBO EP EQUIPMENT CO., LTD
    Inventor: Xuelue Qian
  • Patent number: 9333512
    Abstract: An electrostatic screen battery for emission control (ESBEC) system includes a plurality of screens arranged in an alternating manner, so that screens at a first electric potential are interposed with screens at a second electric potential, with an ionizer disposed upstream of the screens, wherein a particulate-containing exhaust stream passing by the ionizer and then through the screens deposits particulates onto the screens. In preferred embodiments the screens have hydrophobic surfaces.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: May 10, 2016
    Assignee: RUTGERS, THE STATE UNIVERSITY OF NEW JERSEY
    Inventors: Gediminas Mainelis, Taewon Han
  • Patent number: 9090984
    Abstract: A process for producing hydrogen for use in a subsequent methanation process includes electrochemically converting water into hydrogen and oxygen. The hydrogen is depleted with electrolyte aerosols. Then, the electrolyte aerosols are separated from the depleted hydrogen in a wet electrostatic precipitator in a hydrogen atmosphere.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: July 28, 2015
    Assignee: OUTOTEC (FINLAND) OY
    Inventors: Nikola Anastasijevic, Jan Holst, Andreas Orth, Markus Schuster, Bernd Schurtakow, Michael Stroeder
  • Patent number: 9028588
    Abstract: Disclosed is a filtration system and method that uses a corona discharge grid and a series of electrostatic grids to filter ambient particles. The filtration system eliminates, or greatly reduces, the pressure drop across the associated filter media.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: May 12, 2015
    Inventor: Donald H. Hess
  • Patent number: 8961659
    Abstract: An electrically enhanced air filtration system is disclosed which uses rear fiber charging is disclosed. In particular, a fibrous filter may be placed in an upstream position within the system with one or more ionization arrays positioned downstream or to the rear of the fibrous filter in terms of airflow direction. The fibrous filter may include a grounded side and fiber side with the grounded side being upstream of the fiber side. The ionization array may include a plurality of electrodes each extending unidirectionally toward the fibrous filter.
    Type: Grant
    Filed: October 20, 2009
    Date of Patent: February 24, 2015
    Assignee: Carrier Corporation
    Inventor: Peter J. McKinney
  • Patent number: 8814994
    Abstract: Improvements in active field polarized media air cleaner include an aerodynamic front cowling to reduce static air resistance, a rear double hinge to reduce blow by, a resistive center screen permitting the sharing of high voltage power supplies while reducing the tendency to arc and allowing for a higher operational voltage, a dielectric media support frame to produce a more uniform electrostatic field and reduce blow by, while at the same time reducing the tendency to spray corona and/or arc at the edges of the center screen, a substantially flat conductive outer screen to produce a more uniform electrostatic field throughout the filter media and a high-voltage shield to reduce high-voltage arcing and the spraying of corona where the high-voltage probe contacts the center screen.
    Type: Grant
    Filed: December 6, 2011
    Date of Patent: August 26, 2014
    Assignee: Environmental Management Confederation, Inc.
    Inventors: Forwood C. Wiser, George R. Summers, Benjamin H. Kaeppner
  • Patent number: 8795601
    Abstract: Filter media for an active field polarized media air cleaner includes two layers of dielectric material with a higher resistance air permeable screen sandwiched between the lower resistivity electric layers. The filter media may further include a mixed fiber filter layer having fibers from different sides of the triboelectric scale. The filter media may further include a layer of relatively higher density dielectric material followed by a layer of relatively lower density dielectric material.
    Type: Grant
    Filed: August 13, 2012
    Date of Patent: August 5, 2014
    Assignee: Environmental Management Confederation, Inc.
    Inventors: Forwood C. Wiser, George R. Summers, Benjamin H. Kaeppner
  • Patent number: 8790449
    Abstract: Electret webs are presented which include a blend of a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additives include a heterocyclic imide material which is free of fluorinated groups. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: July 29, 2014
    Assignee: 3M Innovative Properties Company
    Inventors: Fuming B. Li, John M. Sebastian, Marvin E. Jones, Daniel A. Japuntich
  • Patent number: 8721775
    Abstract: The electronic air filter has a pair of pads between which a grid is sandwiched. The pads are composed of glass fiber or like filtering medium while the grid is composed of two or more pads of carbon interconnected by a network of filaments having a cotton core surrounded by a graphite sheath. The grid is connected to a source of electrical power at a voltage at which a corona field develops around the grid with resulting polarization of the grid.
    Type: Grant
    Filed: May 17, 2011
    Date of Patent: May 13, 2014
    Inventor: Jeff Chesebrough
  • Patent number: 8709139
    Abstract: A layer for use in a HEPA filter element solves the problem of disclosing a filter element which satisfies HEPA requirements. Said layer comprises a first support layer (1) for stabilization which contains polypropylene fibers, and a second deposition layer (2) which contains polypropylene fibers, wherein the polypropylene fibers of the deposition layer (2) are at least partially electrostatically charged, and wherein the support layer (1) and the deposition layer (2) are constructed as nonwoven material which is at least partially free of glass fiber. The layer according to the invention can be easily pleated while having excellent filter efficiency.
    Type: Grant
    Filed: December 3, 2007
    Date of Patent: April 29, 2014
    Assignee: Carl Freudenberg KG
    Inventors: Klauss Veeser, Armin Greiner, Harold Von Schischka, Juergen Adolph, Toan-Hieu Giang
  • Patent number: 8679409
    Abstract: The present invention discloses a filter device. The filter device comprises a housing with an air inlet and an filtered air outlet; a high voltage electric field region provided between two ends of the housing, wherein the direction of the electric field is perpendicular to the direction along which the air is introduced into the housing; an ionization source provided in the electric field region to ionize the ionizable pollutants present in the air introduced from the air inlet and form the resultant ionized pollutants which will move towards both ends of the housing under the influence of the electric field; and a discharging device for discharging the ionized pollutants which have arrived at the ends of the housing out of the filter device. The present invention also relates to a filtering method of using the filter device, and a trace detector.
    Type: Grant
    Filed: June 25, 2010
    Date of Patent: March 25, 2014
    Assignee: Nuctech Company Limited
    Inventors: Yangtian Zhang, Jin Lin
  • Patent number: 8663354
    Abstract: An air filter (111) comprising a duct (118, 120) forming a passageway extending between an inlet (116) and an outlet (113) of the air filter, the duct comprising bristles (310) extending from a wall of the duct across at least a portion of the passageway so as to remove entrained particles from air passing through the duct.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: March 4, 2014
    Assignee: 4Energy Ltd
    Inventors: Patrick Arthur Tindale, Stuart Peter Redshaw
  • Patent number: 8613795
    Abstract: Electret webs are presented which include a blend of a thermoplastic resin and a charge-enhancing additive. The charge-enhancing additives include N-substituted amino carbocyclic aromatic materials. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.
    Type: Grant
    Filed: May 4, 2009
    Date of Patent: December 24, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Fuming B. Li, Feng Bai, John M. Sebastian, Marvin E. Jones
  • Patent number: 8585799
    Abstract: The present technology provides an air pre-treatment and monitoring device that includes an inlet port configured to receive an air flow and an outlet port configured to expel the air flow. The illustrative air pre-treatment device further includes a multiple-stage filter arranged between the inlet and outlet ports and that is configured to filter particles from the air flow.
    Type: Grant
    Filed: June 15, 2010
    Date of Patent: November 19, 2013
    Assignee: Empire Technology Development LLC
    Inventors: Yasuhisa Fujii, Masahiro Ueda
  • Patent number: 8574353
    Abstract: An object of the present invention is to provide an electric dust collector with its dust collecting performance being improved for collecting dust-like particles contained in a gas, whereas the increase in size thereof is being suppressed. An electric dust collector distributes a gas that has flown into a distribution chamber to a plurality of charging flow paths in a casing thereof, causes the distributed gas to flow from the insides of the charging flow paths into internal flow paths through mesh filters that are formed as parts of the dust collecting electrodes and that have a large surface areas per unit volume. Then, the gas is discharged to a central chamber through internal outlets. Subsequently, the flow of the gas is controlled to be discharged to the outside through a gas outlet.
    Type: Grant
    Filed: November 11, 2009
    Date of Patent: November 5, 2013
    Assignee: Furukawa Industrial Machinery Systems Co., Ltd.
    Inventors: Taksuki Nazuka, Kazuhiro Suginami
  • Patent number: 8551227
    Abstract: The present invention relates to an electrostatic filter. Particularly but not exclusively the invention relates to an electrostatic filter for removing dust particles, for example an electrostatic filter for use in a vacuum cleaner, fan or air conditioner. The electrostatic filter includes a filter medium located between a first and a second electrode, each at a different voltage during use, such that a potential difference is formed across the filter medium, wherein a property of the filter medium varies along the length of the filter medium.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: October 8, 2013
    Assignee: Dyson Technology Limited
    Inventor: Lucas Horne
  • Patent number: 8551208
    Abstract: A method, including receiving a turbine filter unit in a plasma treatment system, wherein the turbine filter unit comprises a filter media assembled with a framework, and applying at least one plasma treatment coating to the turbine filter unit via the plasma treatment system.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: October 8, 2013
    Assignee: General Electric Company
    Inventor: Timothy Nicholas
  • Patent number: 8529671
    Abstract: Electret webs are presented which include a blend of a thermoplastic resin and a charge additive. The charge additives include ester-substituted and amide-substituted trianilino triazine materials. The webs prepared from the blends may be in the form of films or non-woven fibrous webs. Non-woven microfiber webs are useful as filtration media.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: September 10, 2013
    Assignee: 3M Innovative Properties Comany
    Inventors: John M. Sebastian, Fuming B. Li, Marvin E. Jones, Luke T. Dressel, Daniel A. Japuntich
  • Patent number: 8518152
    Abstract: A method for manufacturing an electrostatic non-woven intake filter, may include a fabric preparation process that weaves at least a kind of fiber fabric into a web, and a filter fabric manufacturing process that weaves the web into a felt that has at least a layer, and manufactures an electrostatic non-woven intake filter material that is a non-woven fabric having a fiber tissue having a semipermanent electrostatic force by allowing a binder and an electrostatic material to permeate the felt.
    Type: Grant
    Filed: October 19, 2010
    Date of Patent: August 27, 2013
    Assignees: Hyundai Motor Company, Kia Motors Corporation
    Inventors: Sangil Lee, Jungmin Kim
  • Patent number: 8512454
    Abstract: The invention relates to electrostatic dust catcher including a first (1) and a second electrode (2) and a voltage source (3) for applying an electrical voltage between the two electrodes (1, 2). The first electrode (1) is designed as a dust catching device and the second electrode (2) is grounded.
    Type: Grant
    Filed: November 13, 2008
    Date of Patent: August 20, 2013
    Assignee: Carl Freudenberg KG
    Inventors: Karl-Ludwig Gibis, Mike Kosub
  • Patent number: 8506669
    Abstract: A pleated filter is made from a monocomponent monolayer nonwoven web of continuous monocomponent meltspun partially crystalline and partially amorphous oriented fibers of the same polymeric composition that are bonded to form a coherent and handleable web having a Gurley Stiffness of at least 100 mg and which further may be softened while retaining orientation and fiber structure. Rows of pleats are formed in the nonwoven web, and the web is cut to a desired size and shape to provide a pleated filter element containing a self-supporting porous monocomponent monolayer matrix of fibers bonded to one another at least some points of fiber intersection and having an average initial submicron efficiency of at least 15% at a 1.52 meters/sec face velocity. The filter element is deformation resistant without requiring stiffening layers, bicomponent fibers, adhesive or other reinforcement in the filter media layer.
    Type: Grant
    Filed: April 13, 2011
    Date of Patent: August 13, 2013
    Assignee: 3M Innovative Properties Company
    Inventors: Andrew R. Fox, John D. Stelter, Seyed A. Angadjivand, William T. Fay, Michael R. Berrigan, Douglas C. Sundet
  • Patent number: 8496734
    Abstract: A sorbent structure comprising a continuous activated carbon body in the form of a flow-through substrate; and an additive provided on the flow-through substrate, wherein the additive is capable of enhancing the sorption of CO2 on the sorbent structure. Methods of making the sorbent structure, its use for CO2 capture, and methods for regenerating the structure for further use.
    Type: Grant
    Filed: February 26, 2009
    Date of Patent: July 30, 2013
    Assignee: Corning Incorporated
    Inventors: Kishor Purushottam Gadkaree, Youchun Shi
  • Patent number: 8465574
    Abstract: The present invention relates to an electrostatic filter. Particularly but not exclusively the invention relates to an electrostatic filter for removing dust particles, for example an electrostatic filter for use in a vacuum cleaner, fan or air conditioner. The electrostatic filter includes a filter medium located between a first and a second electrode, each at a different voltage during use, such that a potential difference is formed across the filter medium, the first and second electrodes being substantially non-porous.
    Type: Grant
    Filed: July 15, 2010
    Date of Patent: June 18, 2013
    Assignee: Dyson Technology Limited
    Inventor: Lucas Horne
  • Patent number: 8409327
    Abstract: An electrostatic filter assembly configured to be installed in equipment for removing particulate matter entrained within a gas stream. The filter assembly functions in the removal and collection of the particulate matter from the gas stream. The equipment for removing particulate matter includes a high voltage discharge electrode for imparting an electric charge to the particulate matter whereby an electrical field is produced at the filter assembly. The filter assembly includes a filter element and a supporting structure for the filter element. The supporting structure is configured to establish at the filter assembly, under the operating conditions of the equipment for removing particulate matter, an electrical field having an intensity that produces no more than a selected amount of degradation at the filter element during operation of the equipment for removing particulate matter. Also a method of manufacturing such an electrostatic filter assembly.
    Type: Grant
    Filed: June 4, 2010
    Date of Patent: April 2, 2013
    Assignee: General Electric Company
    Inventors: Robert Taylor, Karim Younsi, David F. Johnston, Yingneng Zhou, Yaru Najem Mendez Hernandez, Prabhakar Neti
  • Patent number: 8337600
    Abstract: An electrostatic precipitator for removing solid and liquid components from an aerosol includes a precipitator housing having a raw gas inlet for an aerosol to be cleaned, a clean gas outlet for cleaned aerosol, and at least one aerosol supply channel flange-mounted to the raw gas inlet, a drain device for solid and liquid components that are separated from the aerosol, an ionization stage externally powered via a high-voltage bushing and including at least one metallic high-voltage rod that extends into a flow path of the aerosol and to which high voltage is applyable, and a collector stage disposed in the flow path downstream of the ionization stage.
    Type: Grant
    Filed: January 14, 2009
    Date of Patent: December 25, 2012
    Assignee: Karlsruher Institut Fuer Technologie
    Inventors: Hanns-Rudolf Paur, Andrei Bologa, Klaus Woletz
  • Patent number: 8303693
    Abstract: A filtration medium includes a fine filter layer having a plurality of nanofibers and a coarse filter layer having a plurality of microfibers attached to the fine filter layer. The coarse filter layer is positioned proximal to a direction of fluid flow, and the fine filter layer is positioned distal to the direction of fluid flow.
    Type: Grant
    Filed: April 26, 2007
    Date of Patent: November 6, 2012
    Assignee: The Hong Kong Polytechnic University
    Inventor: Wallace W. Leung
  • Patent number: 8262781
    Abstract: A method is provided which can efficiently remove conidia and microbe or the like of a phytopathogen from air and does not cause generation of ozone originated from discharge or so, thereby preventing occurrence of a plant disease without damaging a plant. There are also provided a flying organism removing apparatus and a plant protecting apparatus which can adequately capture flyable organisms, such as spores of a phytopathogen and/or small vermin, by applying an electrostatic field to the flyable organisms. An electrostatic field generated by dielectric polarization is applied to flyable organisms.
    Type: Grant
    Filed: December 27, 2011
    Date of Patent: September 11, 2012
    Assignees: Kagome Co., Ltd., Kinki University, Osaka Prefectural Government
    Inventors: Hideyoshi Toyoda, Yoshinori Matsuda, Teruo Nonomura, Koji Kakutani, Shin-ichi Kusakari, Katsuhide Higashi
  • Patent number: 8252095
    Abstract: Filter media for an active field polarized media air cleaner includes two layers of dielectric material with a higher resistance air permeable screen sandwiched between the lower resistivity electric layers. The filter media may further include a mixed fiber filter layer having fibers from different sides of the triboelectric scale. The filter media may further include a layer of relatively higher density dielectric material followed by a layer of relatively lower density dielectric material.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: August 28, 2012
    Assignee: Environmental Management Confederation, Inc.
    Inventors: Forwood C. Wiser, George R. Summers, Benjamin H. Kaeppner
  • Patent number: 8252097
    Abstract: An air cleaner for an enclosed electronic device such as an electronic slot machine, for use in areas that have a high level of air contamination from cigarette smoking such as casinos, includes an active field polarized media air cleaner or other filters for removing sub-micron particles, tars and/or volatile organic compounds (VOC's). In addition, a shared air cleaner for removing sub-micron particles, tars and/or VOCs is coupled to a plurality of enclosed electronic devices, such as a cluster of electronic slot machines.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: August 28, 2012
    Assignee: Environmental Management Confederation, Inc.
    Inventor: Forwood C Wiser
  • Patent number: 8182580
    Abstract: The invention relates to a novel gas filter structure, a filtering method and a method of producing the filter structure. The structure according to the invention includes a planar, porous isolation material layer (12) having two opposing surfaces. According to the invention both surfaces of the isolation material layer (12) include comprise a porous conductive layer (14, 16) including a porous filtering matrix treated with a conductive material. The conductive material consists of a material different from the support matrix. By use of the conductive layers it is possible to create in the isolation material an electric field that considerably improves the filtering efficiency of the isolation material, especially for small particles.
    Type: Grant
    Filed: May 11, 2007
    Date of Patent: May 22, 2012
    Assignee: Valtion Teknillinen Tutkimuskeskus
    Inventors: Otto-Ville Kaukoniemi, Kaisa Lehtinen, Harri Kosonen
  • Publication number: 20120111188
    Abstract: An electrostatic precipitator and a method of removal of particulates from gaseous flows. A plurality of screens, secured in sets within a central chamber in a housing, comprise at least one set of electrically chargeable first screens and at least one set of electrically grounded second screens. For each set of chargeable screens, all the screens of the set are provided with an identical electrical charge, either positive or negative, and the set is provided with a plurality of spikes directed at the oncoming gaseous flow. At least one screen cleaning means selectively acts on the screens of each set. The precipitator can comprise a plurality of central chambers in a single housing or separate housings, and the chambers can be selectively activated or deactivated. The precipitator provides improved particulate removal from gaseous flows, including hot flows having temperatures up to at least 1200° C.
    Type: Application
    Filed: July 16, 2010
    Publication date: May 10, 2012
    Applicant: HER MAJESTY THE QUEEN IN RIGHT OF CANADA AS REPRESENTED BY THE MINISTER OF NATURAL RESOURCES
    Inventors: Kourosh Zanganeh, Zahirul Hasan Khan, Carlos Salvador, Jack Jensen
  • Patent number: 8167984
    Abstract: A system for the electrical agglomeration of particles in a fluid using a plurality of electrically charged panels, such as electrets, metal panels, or any conductive material, positioned in series perpendicular to the direction of flow of fluid. The panels are about 20% to 80% open to the flow of fluid. The panels produce agglomerates of increasing size and number from the particles in a fluid as the fluid flows through each of the panels. The panels have an electrical charge of about 5,000 to 12,000 volts with amperage about 0.001 amps to 100 amps. Agglomerates are trapped by downstream capture media.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: May 1, 2012
    Inventor: Gilman H. Rogers, Jr.
  • Patent number: 8092768
    Abstract: Apparatus and methods for collection and removal of particulate matter, including fine particulate matter, from a gas stream, comprising a unique combination of high collection efficiency and ultralow pressure drop across the filter. The apparatus and method utilize simultaneous electrostatic precipitation and membrane filtration of a particular pore size, wherein electrostatic collection and filtration occur on the same surface.
    Type: Grant
    Filed: June 11, 2010
    Date of Patent: January 10, 2012
    Assignee: Energy & Environmental Research Center Foundation
    Inventors: Stanley J. Miller, Ye Zhuang, Jay C. Almlie
  • Patent number: 8080094
    Abstract: An electrically stimulated air filter apparatus for removing particles from an air stream includes a housing maintaining an ionizer electrode and electrically induced electrodes for producing electrical fields that interact with particles in an air stream passing through the housing to create clusters of the particles, and an electrically induced filter for collecting and separating the clusters of the particles from the air stream passing through the housing.
    Type: Grant
    Filed: January 22, 2007
    Date of Patent: December 20, 2011
    Assignee: Y2 Ultra-Filter, Inc.
    Inventor: Mark Vanderginst
  • Publication number: 20110296989
    Abstract: An electrostatic filter assembly configured to be installed in equipment for removing particulate matter entrained within a gas stream. The filter assembly functions in the removal and collection of the particulate matter from the gas stream. The equipment for removing particulate matter includes a high voltage discharge electrode for imparting an electric charge to the particulate matter whereby an electrical field is produced at the filter assembly. The filter assembly includes a filter element and a supporting structure for the filter element. The supporting structure is configured to establish at the filter assembly, under the operating conditions of the equipment for removing particulate matter, an electrical field having an intensity that produces no more than a selected amount of degradation at the filter element during operation of the equipment for removing particulate matter. Also a method of manufacturing such an electrostatic filter assembly.
    Type: Application
    Filed: June 4, 2010
    Publication date: December 8, 2011
    Applicant: BHA Group, Inc.
    Inventors: Robert Taylor, Karim Younsi, David F. Johnston, Yingneng Zhou, Yar+e,acu u+ee Najem M+e,acu e+ee ndez Hern+e,acu a+ee ndez, Prabhakar Neti
  • Patent number: 8070861
    Abstract: Improvements in active field polarized media air cleaner include an aerodynamic front cowling to reduce static air resistance, a rear double hinge to reduce blow by, a resistive center screen permitting the sharing of high voltage power supplies while reducing the tendency to arc and allowing for a higher operational voltage, a dielectric media support frame to produce a more uniform electrostatic field and reduce blow by, while at the same time reducing the tendency to spray corona and/or arc at the edges of the center screen, a substantially flat conductive outer screen to produce a more uniform electrostatic field throughout the filter media and a high-voltage shield to reduce high-voltage arcing and the spraying of corona where the high-voltage probe contacts the center screen.
    Type: Grant
    Filed: March 26, 2010
    Date of Patent: December 6, 2011
    Assignee: Environmental Management Confederation, Inc.
    Inventors: Forwood C. Wiser, George R. Summers, Benjamin H. Kaeppner
  • Patent number: 8038776
    Abstract: An inlet air filtration system for a gas turbine includes, in an exemplary embodiment, an air plenum, and a plurality of filter elements mounted inside the air plenum, with each filter element including a support structure. The inlet air filtration system also includes a plurality of electrodes positioned proximate the plurality of filter elements, where the electrodes are coupled to a power source which supplies a voltage to the electrodes. The voltage is sufficient to establish an electrostatic field between the electrodes and the filter elements, and is sufficient to produce a corona discharge from the electrodes, wherein an amount of current applied to the filter elements is about 0.1 ?A/ft2 to about 15 ?A/ft2.
    Type: Grant
    Filed: March 23, 2010
    Date of Patent: October 18, 2011
    Assignee: BHA Group, Inc.
    Inventors: Jamison W. Janawitz, Bradley S. Rogers, James Easel Roberts, Thomas Shannon Eckhoff, Robert W. Taylor
  • Patent number: 8021455
    Abstract: A filter element having multiple formed layers of filtration media is disclosed. The media are layered so as to form a pore size gradient. The filter element is capable of removing both solid and liquid particulates from a moving fluid stream. The filter element has high strength and compressibility. The layers can be supported on a porous or perforate support to provide mechanical stability during filtering operations. The filtration media layers can be formed into various filter element forms such as panels, cartridges, inserts, and the like.
    Type: Grant
    Filed: February 21, 2008
    Date of Patent: September 20, 2011
    Assignee: Donaldson Company, Inc.
    Inventors: Daniel E. Adamek, Jan Cappuyns, Egide Emmanuel Paul Baudry Moreau, Ming Ouyang, Robert M. Rogers
  • Patent number: 8016921
    Abstract: An assembly of structural components for supporting an air filtration member is disclosed. The assembly may include an air filtration member and a framework designed to provide support to the filtration member. The framework may include a first structural component forming a lower base of the framework for supporting the filtration member and a second structural component forming an upper base of the framework for supporting the filtration member. The framework may also have an arm that is slidable within and attachable to the framework, and may be configured to provide an adjustment mechanism for the framework, such that the framework and the filtration member can be located within a number of differently sized forced air heating or air conditioning ducts.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: September 13, 2011
    Inventors: Chad Ross Hassell, David F. Broadbent
  • Publication number: 20110209620
    Abstract: An object of the present invention is to provide an electric dust collector with its dust collecting performance being improved for collecting dust-like particles contained in a gas, whereas the increase in size thereof is being suppressed. An electric dust collector 10 distributes a gas G that has flown into a distribution chamber 90 to a plurality of charging flow paths 58 in a casing 12 thereof, causes the distributed gas to flow from insides of the charging flow paths 58 into internal flow paths 28 through mesh filters 30 that are formed as parts of the dust collecting electrodes 16 and that have large surface areas per unit volume. Then, the gas G is discharged to a central chamber 33 through internal outlets 32. Subsequently, the flow of the gas G is controlled to be discharged to the outside through a gas outlet 24.
    Type: Application
    Filed: November 11, 2009
    Publication date: September 1, 2011
    Applicants: FURUKAWA INDUSTRIAL MACHINERY SYSTEMS CO., LTD., TAIHEIYO ENGINEERING CORPORATION
    Inventors: Taksuki Nazuka, Kazuhiro Suginami
  • Publication number: 20110016662
    Abstract: The present invention relates to an electrostatic filter. Particularly but not exclusively the invention relates to an electrostatic filter for removing dust particles, for example an electrostatic filter for use in a vacuum cleaner, fan or air conditioner. The electrostatic filter includes a filter medium located between a first and a second electrode, each at a different voltage during use, such that a potential difference is formed across the filter medium, wherein a property of the filter medium varies along the length of the filter medium.
    Type: Application
    Filed: July 15, 2010
    Publication date: January 27, 2011
    Applicant: Dyson Technology Limited
    Inventor: Lucas HORNE
  • Patent number: 7874515
    Abstract: A gimbaled truss assembly is disclosed including a frame rotatably mounted in a gimbal mount, and a truss rotatably mounted within the frame. The truss is configured to retain a propulsion system. The frame and the truss rotate independently of one another. A fastening system for mounting the propulsion system to the truss includes vibration isolators. A plurality of braces are coupled to the gimbal mount. The braces conform to the external surface of an air vehicle on which the assembly is to be attached.
    Type: Grant
    Filed: January 25, 2007
    Date of Patent: January 25, 2011
    Assignee: Lockheed-Martin Corporation
    Inventors: Joseph W. Kinkopf, David E. Carlile, Alex Siler, Andrew Yuhas, Thomas H. Walsh
  • Publication number: 20100326279
    Abstract: Improvements in active field polarized media air cleaner include an aerodynamic front cowling to reduce static air resistance, a rear double hinge to reduce blow by, a resistive center screen permitting the sharing of high voltage power supplies while reducing the tendency to arc and allowing for a higher operational voltage, a dielectric media support frame to produce a more uniform electrostatic field and reduce blow by, while at the same time reducing the tendency to spray corona and/or arc at the edges of the center screen, a substantially flat conductive outer screen to produce a more uniform electrostatic field throughout the filter media and a high-voltage shield to reduce high-voltage arcing and the spraying of corona where the high-voltage probe contacts the center screen.
    Type: Application
    Filed: March 26, 2010
    Publication date: December 30, 2010
    Applicant: ENVIRONMENTAL MANAGEMENT CONFEDERATION, INC.
    Inventors: Forwood C. Wiser, George R. Summers, Benjamin H. Kaeppner
  • Patent number: 7815720
    Abstract: A dual-filter electrically enhanced air-filtration apparatus and method are described. One embodiment includes an upstream electrically enhanced filter; a downstream electrically enhanced filter; a first control electrode adjacent to an upstream side of the upstream electrically enhanced filter; a second control electrode adjacent to a downstream side of the downstream electrically enhanced filter; and an ionizing electrode disposed between the upstream and downstream electrically enhanced filters, the ionizing electrode having an electrical potential with respect to the first and second control electrodes. Optional field electrodes may be included to enhance the electric fields associated with the upstream and downstream electrically enhanced filters.
    Type: Grant
    Filed: June 29, 2007
    Date of Patent: October 19, 2010
    Assignee: StrionAir, Inc.
    Inventor: Peter J. McKinney
  • Publication number: 20100126343
    Abstract: An electrically enhanced air filter apparatus for filtering particles from moving air is described. The apparatus includes a filter arranged so particles approach the filter a filter speed and pass through an ionizer at an ionizer speed, and is configured so the filter speed is less than the ionizer speed. The ionizer is arranged to guide the moving air in an ionizer airflow direction and generates an ionizing electric field having ionizer field direction substantially perpendicular to the ionizer airflow direction.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 27, 2010
    Applicant: DELPHI TECHNOLOGIES, INC.
    Inventors: Donald John Enzinna, Ilya Reyzin
  • Patent number: 7708813
    Abstract: Filter media for an active field polarized media air cleaner includes two layers of dielectric material with a higher resistance air permeable screen sandwiched between the lower resistivity electric layers. The filter media may further include a mixed fiber filter layer having fibers from different sides of the triboelectric scale. The filter media may further include a layer of relatively higher density dielectric material followed by a layer of relatively lower density dielectric material.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: May 4, 2010
    Assignee: Environmental Management Confederation, Inc.
    Inventors: Forwood C Wiser, George R Summers, Benjamin H Kaeppner
  • Patent number: 7695551
    Abstract: An inlet air filtration system for a gas turbine includes, in an exemplary embodiment, an air plenum, and a plurality of filter elements mounted inside the air plenum, with each filter element including a support structure. The inlet air filtration system also includes a plurality of electrodes positioned proximate the plurality of filter elements, where the electrodes are coupled to a power source which supplies a voltage to the electrodes. The voltage is sufficient to establish an electrostatic field between the electrodes and the filter elements, and at the same time, the voltage is sufficient to produce a corona discharge from the electrodes.
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: April 13, 2010
    Assignee: BHA Group, Inc.
    Inventors: Jamison W. Janawitz, Bradley S. Rogers, James Easel Roberts, Thomas Shannon Eckhoff