Electric Charge Produced By Friction (e.g., By Gas Flow, Etc.) Patents (Class 96/17)
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Patent number: 11504722Abstract: A non-exhaust fine dust collecting apparatus using friction electricity is disclosed. An exemplary embodiment of the present invention provides a non-exhaust fine dust collecting apparatus using friction electricity, including: an air pipe mounted in a vehicle and provided with an inlet through which fine dust generated in a vehicle and charged with a first polarity flows together with air; and a dust collector mounted at a side of an outlet of the air pipe and charged with a second polarity that is opposite to the first polarity to collect the fine dust charged with the first polarity.Type: GrantFiled: January 9, 2019Date of Patent: November 22, 2022Assignee: POSTECH RESEARCH AND BUSINESS DEVELOPMENT FOUNDATIONInventors: Donghyun You, Soo Hwan Jeon, Sang Seung Lee, Junshin Park, Mario Ruettgers
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Patent number: 11484888Abstract: The present disclosure relates to a fine dust removal system including a conductive filter module, and more particularly, to a fine dust removal system having a conductive filter module which includes a cylindrical conductive filter to thereby implement high fine dust removal efficiency with low pressure loss and which can be easily, generally applied to and used in an air cleaner to be installed in windows or in an independent indoor air cleaner.Type: GrantFiled: July 24, 2018Date of Patent: November 1, 2022Assignee: ALINK CO., LTDInventor: Hye Moon Lee
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Patent number: 10172979Abstract: Disposable medical items made from bioplastic resins include a biodegradable resin selected from the group consisting of polylactic acid (PLA), cellulose based PH, polycaprolate (PCL), polybutyleneadipatetetephathalate (PBT), polyhydroxyalkanoate (PHA), green polyethylene (GPE), green polyethylene terephthalate (GPET), Poly3-hydoxybutrate-3-hydroxyhexxanate (PHBH), poly-D-lactide (PDLA), and poly-L-lactide (PLLA); a plasticizer intermixed with the resin to provide a generally homogenous bioplastic; and a device formed from the bioplastic, where the device is at least one of a vaginal speculum, a specimen container, a measuring cup, a urinal, or a medical band.Type: GrantFiled: November 25, 2014Date of Patent: January 8, 2019Inventor: Shantu Patel
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Patent number: 9591957Abstract: An autonomous vacuum cleaner comprising a main body comprising a dirty air inlet, a clean air outlet, an airflow path extending between the dirty air inlet and the clean air outlet, a separating apparatus arranged in the airflow path between the dirty air inlet and the clean air outlet, and an airflow generator for generating an airflow along the airflow path from the dirty air inlet to the clean air outlet. The airflow generator has a discharge portion which discharges airflow into a chamber formed in the main body, the chamber including an opening that is closable by a removable panel, wherein a power source is receivable within the chamber formed in the main body and is removable from the chamber through the opening.Type: GrantFiled: May 17, 2013Date of Patent: March 14, 2017Assignee: DYSON TECHNOLOGY LIMITEDInventors: James Dyson, Peter David Gammack, Mark Stamford Vanderstegen-Drake, Andre David Brown
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Patent number: 9341792Abstract: An silicon-on-insulator (SOI)-based photonics platform is formed to including a venting structure for encapsulating the active and passive optical components formed on the SOI-based photonics platform. The venting structure is used to allow for the encapsulated components to “breathe” such that water vapor and gasses will pass through the package and not condensate on any of the encapsulated optical surfaces. The venting structure is configured to also to prevent dust, liquids and other particulate material from entering the package.Type: GrantFiled: June 7, 2011Date of Patent: May 17, 2016Assignee: CISCO TECHNOLOGY, INC.Inventors: Mary Nadeau, John Fangman, Duane Stackhouse, Craig Young, David Piede, Vipulkumar Patel
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Publication number: 20140305305Abstract: An air cleaner includes a box and a plurality of absorbers. The box includes a base and a top cover covering the base. The base includes a bottom plate opposite to the top cover. The plurality of absorbers are accommodated in the box. Securing ends of the plurality of absorbers are attached to the bottom plate, and free ends of plurality of absorbers touch the top cover. The plurality of absorbers are configured to move with air flowing in the box to rub against the top cover to generate static charges, and dust particles in the air attaches to the static charges. The box outputs air without the dust particles.Type: ApplicationFiled: March 20, 2014Publication date: October 16, 2014Applicant: HON HAI PRECISION INDUSTRY CO., LTD.Inventors: PAO-HENG SHEN, SZU-HAI HUANG
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Patent number: 8741140Abstract: A filter media that inhibits the formation of static charge in a liquid flowing through the filter media comprises a filtration layer having a first surface and a second surface opposite the first surface and comprising a non-conductive fibrous material having a plurality of fibers, the fibrous material comprising a metal layer deposited on at least a portion of the fibers through at least a portion of the thickness of the filtration layer. The filter media or a filter apparatus incorporating the filter media does not require means for dissipating static charge from the fluid and, therefore, does not require grounding.Type: GrantFiled: September 24, 2008Date of Patent: June 3, 2014Assignee: Parker-Hannifin CorporationInventor: Bruce E. Shane
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Patent number: 8709249Abstract: A filter has a filter medium (10) during operation clears fluid, particularly in the form of hydraulic fluid. The filter medium (10) is made of a material such that the potential difference to the fluid to be cleaned is low. The parts of the filter medium (10) have different potentials with respect to each other and/or the fluid to be cleaned such that they cancel each other at least partially, specific dissipation is aspired, or a return of electric charge to the associated filter medium (10) is provided, using a charge equalization situation.Type: GrantFiled: December 18, 2008Date of Patent: April 29, 2014Assignee: Hydac Filtertechnik GmbHInventors: Andreas Schmitz, Edwin Koch, Matthias Schwender, Claudia Brocker
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Publication number: 20130340618Abstract: Various embodiments disclose filtration apparatuses and processes for filtering particles from a particle-laden air stream. In one embodiment, a filter is provided with a front face layer, in which at least one impaction nozzle is formed, is to accelerate an air stream onto an interior substrate to capture large particle sizes with a calculated fractional efficiency. The interior substrate is formed within the filter. The filter further includes a rear face layer in which at least one opening is formed to exhaust the air stream. A filter media material may be placed between the front face layer and rear face layer. Other apparatuses and processes are disclosed as well.Type: ApplicationFiled: March 15, 2013Publication date: December 26, 2013Applicant: LMS Technologies, Inc.Inventors: Kui-Chiu Kwok, Ali Reza Vatine
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Patent number: 8608838Abstract: The invention provides an air purification system in form of tubing, by which particulates of various sizes in the air flow can be collected. The system includes an air inlet, an air outlet and a particulate removing unit located therebetween, the particulate removing unit including a tubing array of material having low dielectric constant, when an air flow passes through the system electrostatic effect is created between the air flow and the tubing material so as to remove the particulates entrained within the air flow. The invention also provides a method for removing particulates from air flow using the electrostatic effect created between the air flow and said material.Type: GrantFiled: January 14, 2011Date of Patent: December 17, 2013Assignee: Yau Lee Innovative Technology, Ltd.Inventors: Tin Cheung Wong, Yee Tak Leung
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Patent number: 8518152Abstract: 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: GrantFiled: October 19, 2010Date of Patent: August 27, 2013Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Sangil Lee, Jungmin Kim
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Publication number: 20130047856Abstract: Provided is an electrically charged filter which has a high initial filtering efficiency and is not liable to decline in filtering efficiency, by including a liquid-charged nonwoven fabric layer that is charged by application of force via a polar liquid, and a tribo-electrically charged nonwoven fabric layer that is charged by friction between fiber components of a plurality of types.Type: ApplicationFiled: May 2, 2011Publication date: February 28, 2013Applicant: JAPAN VILENE COMPANY, LTD.Inventors: Masami Takeuchi, Yuichirou Takashima
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Patent number: 8359768Abstract: An air inlet and outlet passage module for desiccation is formed in a hollow structure including a frame and two boards. The frame has a frame channel formed between frame sides and a duct cap on an outer side. The duct cap has an opening communicating with the frame channel and is coupled with an air duct to connect a plurality of air inlet and outlet passage modules in series. The duct cap not being coupled is sealed through a lid. The two boards are located at two corresponding sides of the frame and have a plurality of air vents formed thereon to facilitate air ventilation. Each air vent is formed at a diameter smaller than that of a grain to prevent crops from dropping into the module. The invention can be assembled and disassembled, and coupled in series or parallel easily to enhance drying efficiency and reduce energy waste.Type: GrantFiled: June 15, 2010Date of Patent: January 29, 2013Inventor: Tsan-Hsiung Cheng
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Patent number: 8317908Abstract: An air purifier has an air blower and a rotating brush, the brush having long flexible bristles made of a material that is capable of developing negative triboelectric charge. During a portion of the rotation cycle, the bristles move across a surface that can accumulate a positive charge. This causes the bristle to charge negatively. Air impurities are attracted to the negatively charged bristles and are discharged into a collecting bin.Type: GrantFiled: October 26, 2009Date of Patent: November 27, 2012Assignee: Kaz USA, Inc.Inventor: Jacob Fraden
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Patent number: 8252095Abstract: 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: GrantFiled: March 26, 2010Date of Patent: August 28, 2012Assignee: Environmental Management Confederation, Inc.Inventors: Forwood C. Wiser, George R. Summers, Benjamin H. Kaeppner
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Publication number: 20120097035Abstract: A filtration material comprising a blend of polypropylene and acrylic fibers of round, flat, dog bone, oval or kidney bean shape in any size from 0.08 to 3.3 Dtex. A preferred blend contains about 50 weight percent polypropylene fibers and about 50 weight percent acrylic fibers. The fibers can be blended ranging from 90:10 to 10:90 polypropylene to acrylic. The shape contains 25 weight percent round, flat, oval, dog bone and kidney bean shapes. The fiber blend contains 25 weight percent of at least one size between 0.08 and 3.3 Dtex. Electret fibers incorporated within these blends have 0.02 to 33 weight percent of a charge control agent. These fibers can be used in producing electret material by corona or triboelectric charging methods.Type: ApplicationFiled: October 25, 2011Publication date: April 26, 2012Inventor: Rick L. Chapman
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Patent number: 8105425Abstract: An air filter including a plurality of air-pervious sheets of electret filtration material. The sheets are disposed in a parallel relationship to form a stack of sheets, and each of the sheets has a plurality of slits formed therein for subsequent expanding to form openings. The stack is connected together at opposing ends, such as by bonding. The sheets can be pleated by mounting in a frame. The frame has opposing ends to which the opposing ends of the stack are mounted. The filter media initially has no frame and is not pleated, but is in a flat pad form that is expanded to be installed into a frame. The frame is then mounted in an appliance, such as a room air filter. When the filter is inserted into the filter housing it is expanded and can take a pleated form.Type: GrantFiled: April 1, 2011Date of Patent: January 31, 2012Assignee: Columbus Industries, Inc.Inventors: Thaddeus J. Ptak, Chrystal B. Gillilan, Russell Baldinger
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Publication number: 20110308386Abstract: The present invention generally relates to an efficiency-enhanced gas filter medium comprising at least two fiber layers comprising a combination of two or more electrostatically-interacting fiber layers such that the efficiency-enhanced gas filter medium is characterizable by a gas filtration efficiency enhancement from the combination of the two or more electrostatically-interacting fiber layers, and related manufactured articles, processes and methods.Type: ApplicationFiled: May 13, 2011Publication date: December 22, 2011Inventors: Jerome Claracq, James F. Sturnfield, Peter Cate, Wu Chen, Leonardo C. Lopez
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Patent number: 8080086Abstract: A filtration media that incorporates a static dissipative media layer for dissipating the static charge that builds up as a fluid, such a fuel, passes through the filtration media. The filtration media includes a filter media suitable for filtering fluid, and a static dissipative media layer. The static dissipative media layer has a surface resistivity level that is sufficient to classify the media layer as static dissipative rather than conductive.Type: GrantFiled: March 9, 2011Date of Patent: December 20, 2011Assignee: Kuss Filtration Inc.Inventors: Julie Graber, Gary L. Rickle, Michael J. Monnin
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Patent number: 8016921Abstract: 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: GrantFiled: November 10, 2008Date of Patent: September 13, 2011Inventors: Chad Ross Hassell, David F. Broadbent
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Publication number: 20110179950Abstract: The invention provides an air purification system in form of tubing, by which particulates of various sizes in the air flow can be collected. The system comprises an air inlet, an air outlet and a particulate removing unit located therebetween, the particulate removing unit including a tubing array of material having low dielectric constant, when an air flow passes through the system electrostatic effect is created between the air flow and the tubing material so as to remove the particulates entrained within the air flow. The invention also provides a method for removing particulates from air flow using the electrostatic effect created between the air flow and said material.Type: ApplicationFiled: January 14, 2011Publication date: July 28, 2011Applicant: YAU LEE INNOVATIVE TECHNOLOGY LIMITEDInventors: Tin Cheung WONG, Yee Tak LEUNG
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Patent number: 7951229Abstract: An air filter including a plurality of air-pervious sheets of electret filtration material. The sheets are disposed in a parallel relationship to form a stack of sheets, and each of the sheets has a plurality of slits formed therein for subsequent expanding to form openings. The stack is connected together at opposing ends, such as by bonding. The sheets can be pleated by mounting in a frame. The frame has opposing ends to which the opposing ends of the stack are mounted. The filter media initially has no frame and is not pleated, but is in a flat pad form that is expanded to be installed into a frame. The frame is then mounted in an appliance, such as a room air filter. When the filter is inserted into the filter housing it is expanded and can take a pleated form.Type: GrantFiled: September 11, 2007Date of Patent: May 31, 2011Assignee: Columbus Industries, Inc.Inventors: Thaddeus J. Ptak, Chrystal B. Gillilan, Russell Baldinger
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Publication number: 20110094383Abstract: Disclosed herein are an electric precipitator, which efficiently charges dust particles without lowering dust collecting efficiency, although a velocity of an air current is not uniform, and an air cleaner having the same. The electric precipitator includes a charger unit including at least two charge cells to charge dust particles contained in air, and a collector unit to collect the dust particles charged by the charger unit. The at least two charge cells include a first cell, through which the dust particles pass at a first velocity, and a second cell, through which the dust particles pass at a second velocity different from the first velocity.Type: ApplicationFiled: September 28, 2010Publication date: April 28, 2011Applicant: SAMSUNG ELECTRONICS CO., LTD.Inventors: Hyong Soo Noh, Jun Ho Jl, Kochiyama Yasuhiko, So Young Yun, Dong Woo Woo, Min Kyu Yeo
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Publication number: 20110089038Abstract: A filter element includes a flow-through element and a floor element that abut one another to form a crevice along a crevice length between the flow-through element and the floor element. The crevice traps a portion of particles that become dislodged from the flow-through element.Type: ApplicationFiled: October 19, 2009Publication date: April 21, 2011Applicant: SEAGATE TECHNOLOGY LLCInventors: Clifford Jayson Bringas Camalig, Asmin Buang
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Patent number: 7927400Abstract: A filtration media that incorporates a static dissipative media layer for dissipating the static charge that builds up as a fluid, such a fuel, passes through the filtration media. The filtration media includes a filter media suitable for filtering fluid, and a static dissipative media layer. The static dissipative media layer has a surface resistivity level that is sufficient to classify the media layer as static dissipative rather than conductive.Type: GrantFiled: April 3, 2008Date of Patent: April 19, 2011Assignee: Cummins Filtration IP, Inc.Inventors: Julie Graber, Gary L. Rickle, Michael J. Monnin
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Publication number: 20110002814Abstract: 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: ApplicationFiled: March 26, 2010Publication date: January 6, 2011Applicant: Environmental Management Confederation, Inc.Inventors: Forwood C. Wiser, George R. Summers, Benjamin H. Kaeppner
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Patent number: 7839619Abstract: An apparatus for reducing static electricity includes an ionizer that generates ions for neutralizing static electricity, a blower that produces a current of air for moving the ions to a desired location, and a motion detector operatively connected to the blower. Upon detecting motion, the motion detector activates the blower, which disperses ions to reduce static electricity at the desired location. The apparatus can include a heater for heating the current of ionized air. In addition, the motion detector can be operatively linked to the ionizer and heater so that they are also activated upon detection of motion. The blower can be linked to a timer such that it runs for a predetermined amount of time upon activation by the motion detector, or the blower can run continuously until the motion detector no longer detects any motion. The apparatus is particularly useful for reducing static electricity around fuel dispensers.Type: GrantFiled: June 2, 2009Date of Patent: November 23, 2010Inventors: Kent J. George, Keith J. George, D. Duane Gilliam
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Publication number: 20100251894Abstract: An air handling device (10) includes an air flow path (13) in which a charge section (20) for charging dust in an air to be handled, and a precipitator (30) for collecting the charged dust are placed. The charge section (20) includes a discharge electrode (25) and a counter electrode (26) to perform diffusion charging. A diffusion space (13a) is provided at a location between the charge section (20) and the precipitator (30).Type: ApplicationFiled: October 8, 2008Publication date: October 7, 2010Inventors: Toshio Tanaka, Shunji Haruna, Kanji Motegi, Ryuji Akiyama
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Publication number: 20100163724Abstract: The present invention is an electrically controlled gettered pump assembly to entrain and fully release hydrogen gas to regulate the pressure and buffer the ions in an ion trap mass spectrometer and other portable analytical instruments. In addition to the gettered pump assembly, the present invention also incorporates a microvalve between the different chambers to release and control the hydrogen content. Hydrogen gas regulates the pressure in mass spectrometers and also acts as a buffering gas to prevent the ions from escaping the trap.Type: ApplicationFiled: December 30, 2009Publication date: July 1, 2010Applicant: UNIVERSITY OF NORTH TEXASInventor: Guido Fridolin Verbeck, IV
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Publication number: 20100122629Abstract: Air purifier containing an air blower and a rotating brush, such brush having long flexible bristles made of a material that is capable of developing negative triboelectric charge. During a part of the rotation cycle, the bristles move across a surface that can accumulate a positive charge. This cause the bristle to charge negatively. The air impurities are attracted to negatively charged bristles and discharged into a collecting bin.Type: ApplicationFiled: October 26, 2009Publication date: May 20, 2010Inventor: Jacob Fraden
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Patent number: 7708813Abstract: 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: GrantFiled: December 29, 2006Date of Patent: May 4, 2010Assignee: Environmental Management Confederation, Inc.Inventors: Forwood C Wiser, George R Summers, Benjamin H Kaeppner
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Patent number: 7691186Abstract: A pleated filter media includes a plurality of parallel conductive beads to support the media and space the pleated surfaces apart. A high voltage differential applied between adjacent conductive beads induces an electrostatic field within the filter media, thereby increasing the efficiency of the filter.Type: GrantFiled: December 29, 2006Date of Patent: April 6, 2010Assignee: Environmental Management Confederation, Inc.Inventor: Forwood C Wiser
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Publication number: 20100058927Abstract: An air filter arrangement comprises an air channel, a first air filter mounted in the air channel, which first air filter comprises a filter frame provided with at least one passage, and a filter body comprising electrostatically chargeable fibres attached to the filter frame. The filter body extends from the filter frame to a position located at a distance from and downstream the filter frame. The air filter arrangement comprises a second air filter comprising a filter cloth which, in a mounted state, is adapted to extend across the air channel such that it is flown through by air flowing in a substantial longitudinal direction in the air channel, and that the second air filter is mounted in the air channel in a position located downstream the first air filter with respect to the flow direction of the air through the air channel.Type: ApplicationFiled: June 21, 2007Publication date: March 11, 2010Applicant: Freshman ABInventor: Staffan Krantz
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Publication number: 20090266231Abstract: A method and apparatus for the separation of particles from a flow of gas, where both large, heavy and small, light particles can be separated off from the gas by means of the combined effect of an electrostatic attraction force and a centrifugal force in a centrifugal separator (10) of the type that comprises a rotor (14) that has a plurality of adjacent surface elements (16) with intermediate gas flow gaps (48) and that is mounted in such a way that it can rotate in a surrounding casing (12), which casing has an inlet (18) for unclean gas and an outlet (22) for clean gas and an outlet (24) for separated-of f particles. A charging unit (44) ionizes the particles upstream of the rotor (14). An electrical field is generated between adjacent surface elements (16) of the rotor in order to attract the ionized light particles towards a face of the surface elements by means of the electrostatic force.Type: ApplicationFiled: June 27, 2006Publication date: October 29, 2009Inventors: Peter Franzen, Claes Inge, Torgny Lagerstedt
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Patent number: 7558044Abstract: An apparatus for reducing static electricity includes an ionizer that generates ions for neutralizing static electricity, a blower that produces a current of air for moving the ions to a desired location, and a motion detector operatively connected to the blower. Upon detecting motion, the motion detector activates the blower, which disperses ions to reduce static electricity at the desired location. The apparatus can include a heater for heating the current of ionized air. In addition, the motion detector can be operatively linked to the ionizer and heater so that they are also activated upon detection of motion. The blower can be linked to a timer such that it runs for a predetermined amount of time upon activation by the motion detector, or the blower can run continuously until the motion detector no longer detects any motion. The apparatus is particularly useful for reducing static electricity around fuel dispensers.Type: GrantFiled: February 4, 2005Date of Patent: July 7, 2009Inventors: Kent J. George, Keith J. George, D. Duane Gillian
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Publication number: 20090139405Abstract: A fan cooling unit (10) for cooling electronic components, such as for an air-cooled telecommunications base station, comprises a protective covering for at least the air inlet opening (11) of a casing (8) in which the electronic components are housed. The protective covering (1) has a frame (2) into which a composite filter media (3) is mounted so as to create an air-tight fit. The composite filter media (3) comprises a membrane filtration layer (20) with a porous polymeric membrane, such as expanded polytetrafluoroethylene (ePTFE), and at least one depth filtration layer (18) disposed on an upstream side of the membrane filtration layer (20). The depth filtration media layer comprises fibers having an electrostatic charge. The ePTFE membrane is preferably made from a blend of a PTFE homopolymer and a modified PTFE polymer.Type: ApplicationFiled: July 13, 2006Publication date: June 4, 2009Inventors: Robert Schwarz, Christiane Rudolf, Wai Sing Poon, Jason W. Muller
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Publication number: 20090120291Abstract: 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: ApplicationFiled: November 10, 2008Publication date: May 14, 2009Inventors: Chad Ross Hassell, David F. Broadbent
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Publication number: 20080271605Abstract: The present invention provides an air-permeable filtration media that includes an air-permeable backing and an adsorbent. The adsorbent is at least partially embedded in the air-permeable backing. The present invention also provides a method of manufacturing an air-permeable filtration media. The present invention also provides a method of substantially removing contaminants form air, employing the air-permeable filtration media.Type: ApplicationFiled: July 16, 2008Publication date: November 6, 2008Inventors: James A. Raetz, Gregory J. Raetz
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Patent number: 7097694Abstract: A high performance, high efficiency filter is provided by a multi-stage filter having combinations of tribologically different fibers, nanofibers, and layering.Type: GrantFiled: December 4, 2003Date of Patent: August 29, 2006Assignee: Fleetguard, Inc.Inventors: Tadeusz Jaroszczyk, Stephen L. Fallon, Byron A. Pardue, Kelly R. Schmitz, Jason E. Dorgan, Thomas P. Sonsalla, Jerald J. Moy, Jeffrey S. Morgan, Kent J. Kallsen
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Patent number: 7004995Abstract: A method for the utilization of a woven or loop-formingly knitted fabric which acquires an electrostatic charge as a result of a specific treatment for filtering airborne, dusty allergens such as pollen in a pollen guard mountable in front of windows and doors over the whole area thereof.Type: GrantFiled: October 23, 2001Date of Patent: February 28, 2006Assignee: tesa AktiengesellschaftInventors: Andreas Schroder, Claus Grobe, Jens Kranz, Dieter Wenninger
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Patent number: 6821320Abstract: A dust collector for collecting fine dust in air and for cleaning the air is provided. A first friction disk is produced from a first substance. A second friction disk is produced from a second substance that is chargeable triboelectrically in a polarity different from a polarity of the first substance. The first and second friction disks frictionally contact one another. The second friction disk moves relative to the first friction disk, to generate electrostatic charge and thereby attract fine dust.Type: GrantFiled: November 18, 2002Date of Patent: November 23, 2004Assignee: Fuji Photo Film Co., Ltd.Inventor: Takao Miyazaki
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Patent number: 6800106Abstract: A filter apparatus includes a filter panel having inner and outer surfaces and a configuration for completely covering a computer housing ventilation opening. The filter apparatus includes an adhesive layer permanently adhered to the inner surface of the filter panel. A thermochromic region is positioned on the outer surface of the filter panel which changes color as temperature increases. The thermochromic region includes an ink layer and a wax layer positioned atop the ink layer. The wax layer includes a thermochromic dye having a color different from the color of the ink layer. The color of the thermochromic dye blocks the color of the ink layer at an ambient temperature and is transparent to allow the ink layer color to be seen at an activation temperature. Therefore, the filter apparatus provides an indication when the filter is full and heat is building within the housing as a result.Type: GrantFiled: February 25, 2003Date of Patent: October 5, 2004Inventors: William K. Cogar, Sr., Loretta I. VanCooney
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Publication number: 20040045441Abstract: The invention relates to woven or knitted fabric and is characterised in that an electrostatic charge is generated by means of friction on the woven or knitted fabric. Said electrostatic charge improves the filtration properties of the fabric.Type: ApplicationFiled: August 29, 2003Publication date: March 11, 2004Inventors: Andreas Schroder, Claus Grobe, Jens Kranz, Dieter Wenninger
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Patent number: 6623548Abstract: An electrostatically charged filter material including a blend of polypropylene fibres and one selected from the group consisting of: halogen free acrylic fibres; polyvinyl chloride fibers or a mixture of halogen free acrylic fibres and polyvinyl chloride fibres.Type: GrantFiled: September 15, 2000Date of Patent: September 23, 2003Assignee: Hollingsworth & Vose Air Filtration LimitedInventors: John Gordon, Jeremy Andrew Collingwood, Martyn Peter Kennaugh
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Patent number: 6572684Abstract: To provide chargeable tow and a laminate thereof, which can be produced with no restriction by the production or processing method, and without troubles such as twining on a roll or single thread snapping caused by static electricity generated in the production steps. Tow, in which the value (D/W) obtained by dividing the total fineness of tow (D) by the tow width (W) is 1,000 to 8,000 dtex/mm, is produced by making a fiber-processing agent adhere thereto, preferably using a particular amount of the agent, wherein the agent has a particular structure and contains a polyoxyethylene higher fatty acid ester and a sorbitan fatty acid ester in a particular blending ratio.Type: GrantFiled: December 27, 2001Date of Patent: June 3, 2003Assignees: Chisso Corporation, Chisso Polypro Fiber Company LimitedInventors: Masuo Iwata, Kanemitsu Fuchigami
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Patent number: 6547860Abstract: A process for the manufacture of a triboelectrically charged nonwoven, wherein a fiber blend made of polyacrylnitrile fibers with a titer of ≦1.7 dtex and of polyolefine fibers with a titer of ≦1.7 dtex is freed from lubricating agents and antistatic agents by washing, is dried down to a moisture content of <1% by weight and is carded on a longitudinal or randomizing card into a triboelectrically charged web with a mass per area unit of 15-80 g/m2. This web is taken off by two simultaneously running rolls and a transfer roll, so that the web is laid on to a conveyor in machine direction, and bonded directly inside a bonding set, the unbonded web being forwarded via 1 to 3 points of transfer only.Type: GrantFiled: November 21, 2001Date of Patent: April 15, 2003Assignee: Firma Carl FreudenbergInventors: Holger Buchwald, Karl-Heinz Morweiser, Klaus Veeser
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Patent number: 6419729Abstract: Filter assemblies with adhesive attachment systems are provided. In one embodiment, a filter assembly includes a porous filter member and an adhesive disposed on a reinforcement scrim adhesively attached to at least a portion of at least one major surface of the porous filter member, wherein the reinforcement scrim has discrete open areas. In an alternative embodiment, a filter assembly includes a porous filter member that includes fibrous filter media and an adhesive impregnated into discrete regions of the porous filter member such that there is a substantially continuous adhesive region throughout at least about 25% of the thickness of the porous filter member in the discrete regions.Type: GrantFiled: April 17, 2000Date of Patent: July 16, 2002Assignee: 3M Innovative Properties CompanyInventors: Dean R. Duffy, William M. Stevenson, John F. Reed, David J. Andrews
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Patent number: 6328788Abstract: The invention concerns a triboelectric air filter consisting essentially of a mixture of polypropylene fibers with polymethaphenylene isophatalamide fibers.Type: GrantFiled: February 9, 2001Date of Patent: December 11, 2001Assignee: Texel Inc.Inventor: Richard Auger
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Patent number: 6296691Abstract: The present invention is an improved molded filter which performs multiple filtration functions within an enclosed environment, such as within a computer hard disk drive. In a first embodiment, the filter is capable of removing particulate contaminants from both incoming (external) air and recirculating air by performing both breather and recirculation functions when placed over a breather hole in a disk drive. In an alternative embodiment, the filter also incorporates an adsorbent material which allows it to remove both particulate and vapor phase contaminants from incoming (external) air and recirculating air within the disk drive.Type: GrantFiled: November 4, 1999Date of Patent: October 2, 2001Assignee: Gore Enterprise Holdings, Inc.Inventor: Rajan Gidumal
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Patent number: 6231646Abstract: A paint overspray exhaust air filter for air laden with liquid paint overspray particulates being exhausted from an overspray paint booth includes an electrostatic charged or electret media used in conjunction with and positioned downstream of a primary high efficiency, high holding capacity overspray collection filter. The overspray air filter is designed to capture and retain virtually all of that overspray particulates contained in the air stream being exhausted from an overspray paint booth. The upstream overspray collection filter can include a single filter or additionally a secondary filter, but should be optimized to collect the overwhelming majority of the overspray particulates of a given size whereas the downstream electret media is adapted to collect overspray particulates that are smaller than the given size. The upstream overspray collection filter and the electret media can be separated or mechanically attached together.Type: GrantFiled: March 11, 1999Date of Patent: May 15, 2001Assignee: Chemco Manufacturing Company, Inc.Inventors: Rand Schweizer, James W. Motter