Sound Absorbing Material Patents (Class 96/381)
  • Patent number: 11573436
    Abstract: Provided is a bubble removal apparatus for removing a bubble on a substrate during a process of manufacturing a display panel or a semiconductor using a liquid, and more particularly, to a bubble removal apparatus using acoustic waves that collects a bubble on a substrate using an acoustic wave and removes the bubble by moving the bubble to a desired position, and a bubble removal method using the same.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: February 7, 2023
    Assignee: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Hyungsuk Lee, Byungjun Kang, Donyoung Kang, Chanryeol Rhyou
  • Patent number: 11219851
    Abstract: A vertical furnace includes a chamber intended for receiving a loading column, an inlet channel for fresh gas, arranged at an upper end of the chamber, the loading column comprising an upper portion, and a central portion for supporting a plurality of substrates. The vertical furnace further comprises a trapping device made of at least one material suitable for trapping all or part of the contaminants present in the fresh gas. The trapping device includes a circular part arranged on the upper part of the loading column, the circular part comprising fins regularly distributed over an upper surface of the circular part in order to increase the contact surface of the trapping device with the fresh gas.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: January 11, 2022
    Assignee: Soitec
    Inventors: Didier Landru, Oleg Kononchuk
  • Patent number: 10522379
    Abstract: A substrate transfer apparatus includes: a chamber including a lower surface, an upper surface opposing the lower surface, and a side surface extending between the lower surface and the upper surface; and a fan filter unit disposed on the upper surface of the chamber and configured to introduce air into the chamber. The chamber includes an inclined surface extending from the upper surface to the side surface and positioned to a side of the fan filter unit.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: December 31, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dae Wee Kong, Kang Min Park, Chul Hwan Choi, Yong Joon Hong, Kang Soo Kim, Sang Ho Roh, Heok Jae Lee, Sang Jin Choi
  • Patent number: 10132332
    Abstract: Disclosed is a blower unit of an air conditioner for a vehicle which is freely changed in design of an intake unit of a blower case, increases dust collection efficiency of an air filter, and improves continuity of filtration-to-area efficiency so as to increase an exchange cycle of the air filter. The blower unit includes a blower case having an inside air inlet for introducing inside air and an outside air inlet for introducing outside air, a blower wheel disposed inside the blower case and rotated by a blower motor, and an air filter disposed at the upstream side of the blower wheel in an air flow direction to filter impurities. The air filter includes: a main filter part corresponding to an air intake area; and auxiliary filter parts which are formed in the outside direction of the air intake area.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: November 20, 2018
    Assignee: HANON SYSTEMS
    Inventors: Young In Kim, Yong Sik Kim, Young Kee Baek, Jun Min Lee
  • Patent number: 10029064
    Abstract: Provided is an expansion-chamber muffler as a downsized sound muffler while keeping a function of noise reduction, comprising: a tube (A) which supplies and evacuates a gas having a noise, wherein the tube (A) in the midway has a cavity with a cross-sectional area larger than that of the tube (A); and at least two or more ports for inflow or outflow of the gas on the lateral side of a tube (B) extending from the expansion-chamber muffler, on the opposite side of the noise source generating the noise.
    Type: Grant
    Filed: March 25, 2013
    Date of Patent: July 24, 2018
    Assignee: TEIJIN PHARMA LIMITED
    Inventors: Shoko Ota, Katsunori Kuwabara
  • Patent number: 10005023
    Abstract: The invention relates to a system and method of treating a flow back fluid exiting a well site following stimulation of a subterranean formation. The invention utilizes a two-stage membrane process during the period that the gas contains high concentrations of CO2 by volume, and allows for separation of CO2 from the natural gas components, providing pipeline-quality natural gas (approximately 5% CO2 by volume) to the gas collection system.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: June 26, 2018
    Assignee: PRAXAIR TECHNOLOGY, INC.
    Inventors: Kenneth L. Burgers, Richard A. Novak
  • Patent number: 9802159
    Abstract: An air separation module includes a housing, an air separation element, and an insulating element. The housing has an inlet and two outlets. The air separation element is enclosed within the housing and extends along a length of the housing. The insulating element is positioned inward of an outer perimeter of the housing and substantially surrounds an outer perimeter of the air separation element along a length of the air separation element.
    Type: Grant
    Filed: July 9, 2015
    Date of Patent: October 31, 2017
    Assignee: Hamilton Sundstrand Corporation
    Inventors: Corey E. Rekow, John E. Horr, Jr.
  • Patent number: 9770687
    Abstract: The present invention relates to a method of controlling a gas separation plant, to a plant thus controlled and also to its use for separation of gas mixtures, especially in the processing of biogas or natural gas, or syngas.
    Type: Grant
    Filed: October 9, 2013
    Date of Patent: September 26, 2017
    Assignee: Evonik Fibres GmbH
    Inventors: Markus Ungerank, Harald Roegl
  • Patent number: 9044700
    Abstract: A device for filtering air comprising a base, a fan functionally attached to the base, an air filter releasably attached to the base, and a substantially air impermeable outer sleeve is provided.
    Type: Grant
    Filed: May 9, 2014
    Date of Patent: June 2, 2015
    Assignee: The Procter & Gamble Company
    Inventors: Dana Paul Gruenbacher, Steven James Schroeck, Jessica Elizabeth Leon, Paolo Dal Bo, Uwe Schober, Pamela Marie Morison
  • Publication number: 20150135961
    Abstract: An oil separator includes a casing that has an inlet for air and an outlet for air, and an impingement member that is provided inside the casing. Air that contains oil is introduced through the inlet into the casing and caused to strike the impingement member so that the oil is separated from the introduced air and is recovered. The outlet opens in the horizontal direction of the casing. The oil separator further includes an L-shaped elbow member that is attached to the outlet. The elbow member protrudes in the horizontal direction from the outlet and is bent upward.
    Type: Application
    Filed: May 9, 2013
    Publication date: May 21, 2015
    Inventors: Takuya Sugio, Ichiro Minato
  • Publication number: 20150128808
    Abstract: A filter component for motor vehicle air conditioning, according to the invention, the filter is comprising a filtration part made of a material able to filter air and a noise reduction part made of a material able to reduce noise. Also disclosed is a filtration assembly comprising the filter component, and a motor vehicle air conditioning device comprising the filtration assembly.
    Type: Application
    Filed: November 12, 2014
    Publication date: May 14, 2015
    Inventor: Tao Bao
  • Publication number: 20140238243
    Abstract: An air filtering apparatus includes a housing defining a top opening and having a front portion defining a bottom opening. A filter is positioned within the top opening and sealed to the housing so that air flowing into the housing passes through the filter. An expansion chamber is in fluid communication with the bottom opening. A motorized fan is located within the housing and is configured for drawing air through the filter, into the housing and out through the expansion chamber. The air output of the motorized fan is directed toward a bottom of the housing proximate a rear of the housing with the expansion chamber extending from the air output of the motorized fan to the front portion of the housing.
    Type: Application
    Filed: February 27, 2014
    Publication date: August 28, 2014
    Inventors: Kip Jardine, Jared Jardine
  • Publication number: 20140102300
    Abstract: Disclosed are devices that include spark or particle arresting, features and muffler features. The disclosed devices may include: (a) an upstream inlet receiving exhaust gas flow; (b) a downstream outlet discharging exhaust gas flow; (c) a cylindrical body disposed between the upstream inlet and downstream outlet; and (d) a particle trap having an opening for collecting particulate matter in the exhaust gas flow, the particle trap disposed downstream of the cylindrical body on a wall of the device. The cylindrical body of the devices typically includes an annular channel permitting axial flow of gas therethrough from an upstream end of the annular channel through a downstream end of the annular channel. The downstream end of the annular channel may be configured to have openings for discharging exhaust gas flow and imparting a spiral flow to the discharged gas flow.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 17, 2014
    Applicant: UNIVERSAL ACOUSTIC & EMISSION TECHNOLOGIES
    Inventors: Elden F. Ray, JR., Jeffrey S. Morgan, Fuhe Mao
  • Patent number: 8636838
    Abstract: To provide an oxygen concentrator that can reduce pressure loss when suctioning raw air and that can increase the amount of suctioned raw air by an amount of reduction in pressure loss, and moreover that can reduce noise without significantly changing a basic structure of a compressor. The oxygen concentrator includes: a compressor that has a plurality of suction ports suctioning raw air and that generates compressed air by compressing suctioned raw air; a conduit through which the compressed air is sent; a silencer that has a suction side end introducing the raw air and a discharge side end discharging the raw air, with the silencer being connected with the conduit; and a plurality of connection conduits directly connecting the discharge side end of the silencer and the respective suction ports of the compressor.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: January 28, 2014
    Assignee: Ikiken Co., Ltd.
    Inventors: Hirofumi Watanabe, Keiichi Asakura
  • Publication number: 20130167727
    Abstract: Air filter and silencers comprise an air filter element having an annular body with openings at opposed ends. A top is attached over one of ends, has an outer flange sealed to the element, and includes a central section extending across the air filter element end. The top central section has a convex-shaped geometry with a radius of curvature projecting outwardly and away from the air filter element. The top central section includes a sound deadening material directed towards the air filter element. The top central section has a radius of curvature greater than the radius of an inside diameter of the air filter element. The air filter and silencer is used with an air filter assembly that includes a housing removably attached to the air filter and silencer, and that has an internal chamber projecting axially into the air filter and silencer with a sound deadening material disposed therein.
    Type: Application
    Filed: December 28, 2012
    Publication date: July 4, 2013
    Applicant: Walker Engineering
    Inventor: Walker Engineering
  • Patent number: 8475555
    Abstract: A cyclonic fluid separator has a tubular housing (10) in which the fluid is accelerated and swirl imparting means (2) for inducing the fluid to swirl through an annular space between the housing and a central body (1) mounted within the housing (10), wherein a low pressure fluid (80) is injected through a central opening (82) in the central body (1).
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: July 2, 2013
    Assignee: Twister B.V.
    Inventors: Marco Betting, Max Robert Anthony Ter Haar, Frederik Albert Lammers, Cornelis Antonie Tjeenk Willink
  • Patent number: 8398734
    Abstract: The invention relates to a cyclonic separator comprising a throat portion (4) arranged between a converging fluid inlet section and a diverging fluid outlet section, to generate a swirling fluid flow in a downstream direction. The diverging fluid outlet section comprises an inner primary outlet (7) for condensables depleted fluid components and an outer secondary outlet for condensables enriched fluid components (6). The cyclonic separator comprises a volute diffuser (9, 9?) connected to one of the outlets (6, 7), which comprises a volute outlet duct (90, 90?) defined by a volute axis (I1), forming a spiral shape around the central axis (I). The outlet duct (90, 90?) comprises a vortex chamber 95. The vortex chamber is provided to transform axial momentum of the swirling fluid flow with respect to the central axis (I) into tangential momentum with respect to the volute axis (I1).
    Type: Grant
    Filed: August 1, 2008
    Date of Patent: March 19, 2013
    Assignee: Twister B.V.
    Inventors: Cornelis Antonie Tjeenk Willink, Marco Betting, Frederik Albert Lammers
  • Patent number: 8377181
    Abstract: A portable oxygen concentrator designed for medical use with a novel housing and internal component design that reduces noise and vibration while increasing durability. The improved design of the portable oxygen concentrator further facilitates easy maintenance and repair over the life of the equipment.
    Type: Grant
    Filed: April 29, 2011
    Date of Patent: February 19, 2013
    Assignee: Inogen, Inc.
    Inventors: Brenton Taylor, Peter Hansen, John Stump, Patrick Burgess
  • Patent number: 7998260
    Abstract: A cyclone silencer of cleaner includes an outlet pipe(2) partially inserted into a cyclone cylinder (1). Ribs (3) are arranged on the lower edge of said outlet pipe (2) and extend downwardly to reduce noise.
    Type: Grant
    Filed: June 11, 2007
    Date of Patent: August 16, 2011
    Assignee: Suzhou Kingclean Floorcare Co., Ltd.
    Inventor: Gen Zu Ni
  • Patent number: 7967901
    Abstract: A lubricating liquid separator which can damp compressor pulsation noise effectively and improve the lubricating liquid separating performance without greatly enlarging the size of the separator itself. A demister having a sound absorbing performance is disposed on an outer periphery of a partition plate. Compressed gas which enters the interior of a housing through a compressed gas inlet port flows as rotating flow in a flow path between the partition plate and a portion of a side wall of the housing opposed to the partition plate. Pressure pulsation of the compressed gas is diminished by the demister, and a compressor pulsation noise by the rotating flow of the compressed gas is diminished by the sound absorption of the demister. Further, with the demister, reflection of the compressed gas at a wall surface of the partition plate is suppressed, and scattering of lubricating liquid separated from the compressed gas is suppressed.
    Type: Grant
    Filed: January 2, 2009
    Date of Patent: June 28, 2011
    Assignee: Kobe Steel, Ltd.
    Inventors: Toru Sakatani, Eiji Kanki, Yasumasa Kimura
  • Patent number: 7887623
    Abstract: An apparatus for collecting smoke and dust with a deodorizing function which has excellent capability for maintenance and an improved deodorizing and silencing effect, the apparatus having a housing and a bulkhead having an opening and disposed in the housing to separate a space for deodorizing and filtering exhaust gas from a space for discharging exhaust gas, a vacuuming device for vacuuming exhaust gas disposed in the space for discharging and communicating with the opening of the bulkhead, a filtering device for filtering exhaust gas disposed in the space for deodorizing and filtering and communicating with the vacuuming device through the opening of the bulkhead, and a deodorizing device for deodorizing the exhaust gas concentrically disposed at an outer side of the filtering device.
    Type: Grant
    Filed: April 17, 2006
    Date of Patent: February 15, 2011
    Assignee: Sintokogio Ltd.
    Inventors: Keisuke Takayanagi, Tomoyuki Suzuki, Hidenori Ikeno
  • Patent number: 7879123
    Abstract: An inertial separator comprising a tubular body, the tubular body comprises a composition comprising a polymer selected from the group consisting of a cyclic olefin polymer and a cyclic olefin copolymer, and, a polyhedral oligomeric silsesquioxane and/or a flame retardant and/or an anti-static additive, is disclosed.
    Type: Grant
    Filed: September 24, 2008
    Date of Patent: February 1, 2011
    Assignee: Pall Corporation
    Inventors: Joseph Edward Lundquist, Allan Thomas
  • Patent number: 7879142
    Abstract: A cyclone dust collector includes a cyclone body including a first cyclone chamber to centrifugally separate dust from drawn-in air for a first time, a plurality of second cyclone chambers to centrifugally separate dust from the drawn-in air for a second time, and a plurality of discharge ports to cause the drawn-in air to be discharged from the plurality of second cyclone chambers; an upper cover to cover an upper portion of the cyclone body, the upper cover having an inner wall facing the plurality of discharge ports; and a noise reduction part disposed between the plurality of discharge ports and the inner wall of the upper cover, to reduce noise generated inside the upper cover by the air discharged through the plurality of discharge ports. Therefore, it is possible to reduce noise generated inside the upper cover of the cyclone dust collector.
    Type: Grant
    Filed: June 5, 2008
    Date of Patent: February 1, 2011
    Assignee: Samsung Gwangju Electronics Co., Ltd.
    Inventors: Jung-gyun Han, Joung-soo Park, Byung-jo Lee, Tae-gwang Kim, See-hyun Kim
  • Patent number: 7833308
    Abstract: The present invention discloses a filter assembly which includes a compartmented housing structure having a plurality of inlets and an outlet. A first inlet is positioned in flow communication with a first chamber portion and a first filter member. A second inlet is positioned in flow communication with a second chamber portion and a second filter member. A third chamber portion is located between the first and second filter members and is in flow communication with the outlet such that ambient air entering the housing through the first and second inlets will flow through the first and second filter members into the third chamber portion and through the outlet.
    Type: Grant
    Filed: January 30, 2008
    Date of Patent: November 16, 2010
    Assignee: Home Health Medical Equipment, Inc.
    Inventor: Michael A. Amann
  • Patent number: 7819223
    Abstract: The present invention generally relates to the attenuation of vacuum blower noise using a silencer. More particularly, the present invention relates to a low-cost, reliable and efficient silencer for reducing noise levels in adsorption-based gas separation plants from the discharge of the vacuum blower or from the feed blower inlet, to about the 90 dBA level or less, at the silencer opening to the atmosphere. The silencer includes at least one reactive chamber(s) to attenuate low frequency pulsations and at least one absorptive chamber(s) to attenuate noise at medium to high frequency noise.
    Type: Grant
    Filed: April 3, 2006
    Date of Patent: October 26, 2010
    Assignee: Praxair Technology, Inc.
    Inventors: Cem E. Celik, James Smolarek, Michael Victor Barsottelli
  • Patent number: 7753979
    Abstract: A filter assembly for use with compressor assemblies such as oxygen concentrators, ventilators and other breathing apparatus including a compartmented housing member having at least one inlet opening, an outlet opening, a filter member, and an adjustment member associated with the at least one outlet opening for varying the size of the at least one outlet opening for adjusting the amount of ambient air entering the filter assembly.
    Type: Grant
    Filed: February 10, 2006
    Date of Patent: July 13, 2010
    Assignee: Home Health Medical Equipment, Inc.
    Inventor: Michael Andrew Amann
  • Patent number: 7635402
    Abstract: An air filter system for an internal combustion engine of a vehicle can have an indicator for signaling restricted flow of air through a replaceable air filter member mounted to a filter assembly. At least one sidewall can be associated with the replaceable air filter member to be positioned with an air stream passing through the air filter member. A resettable air filter status indicator can provide a visually perceivable signal external of the filter assembly. The resettable air filter status indicator can be integrally formed in the sidewall for indicating if a mounted air filter member requires replacement in response to air intake differential pressure with respect to atmospheric pressure on a downstream side of air flow through the replaceable filter member being above a predetermined threshold value.
    Type: Grant
    Filed: December 22, 2006
    Date of Patent: December 22, 2009
    Assignee: Nissan Technical Center North America, Inc.
    Inventor: Dan Hoffman
  • Publication number: 20090255406
    Abstract: A lubricating liquid separator is disclosed which can damp a compressor pulsation noise effectively and improve the lubricating liquid separating performance without greatly enlarging the size of the separator itself. A demister (6) having a sound absorbing performance is disposed on an outer periphery side of a partition plate (5). Compressed gas which enters the interior of a housing (2) through a compressed gas inlet port (3) flows as rotating flow in a flow path (10) formed between the partition plate (5) and a portion of a side wall of the housing (2) opposed to the partition plate (5). Pressure pulsation of the compressed gas is diminished by the demister (6), and a compressor pulsation noise induced by the rotating flow of the compressed gas is diminished by the sound absorbing performance of the demister (6).
    Type: Application
    Filed: January 2, 2009
    Publication date: October 15, 2009
    Inventors: Toru Sakatani, Eiji Kanki, Yasumasa Kimura
  • Patent number: 7601190
    Abstract: In an air filter system for an internal combustion engine having a fresh air line with an air inlet, a filter housing with an upper housing half and lower housing half, a filter element disposed in the filter housing, a clean air outlet opening with an adjoining clean air line opening into the intake system of the internal combustion engine, and means for damping intake noise, the means for damping the intake noise is a sheet configured and arranged adjacent, and clamped to, the upper housing half opposite the clean air outlet whereby the intake noise vibration energy is absorbed by frictional relative movement between the sheet and the upper housing half, the intake noise being damped by a change in impedance, in particular by a jump in impedance.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: October 13, 2009
    Assignee: Daimler AG
    Inventors: Thomas Howe, Wolfgang Lewerenz, Berndt Sch├╝tz
  • Publication number: 20090178567
    Abstract: A cyclone dust collector includes a cyclone body including a first cyclone chamber to centrifugally separate dust from drawn-in air for a first time, a plurality of second cyclone chambers to centrifugally separate dust from the drawn-in air for a second time, and a plurality of discharge ports to cause the drawn-in air to be discharged from the plurality of second cyclone chambers; an upper cover to cover an upper portion of the cyclone body, the upper cover having an inner wall facing the plurality of discharge ports; and a noise reduction part disposed between the plurality of discharge ports and the inner wall of the upper cover, to reduce noise generated inside the upper cover by the air discharged through the plurality of discharge ports. Therefore, it is possible to reduce noise generated inside the upper cover of the cyclone dust collector.
    Type: Application
    Filed: June 5, 2008
    Publication date: July 16, 2009
    Inventors: Jung-gyun Han, Joung-soo Park, Byung-jo Lee, Tae-gwang Kim, See-hyun Kim
  • Patent number: 7533872
    Abstract: An oxygen generator including: a humidifier tank moves up and down according to a horizontal movement of an adjustment knob so that the humidifier tank can be readily detachable, and thus a user can securely and conveniently use the oxygen generator without any water leakage from the humidifier tank during an operation of the oxygen generator. Also, it is possible to reduce noise due to driving of a compressor, noise due to the nitrogen exhaustion, and noise due to driving of a fan portion when the oxygen generator operates, to display purity information about the discharged oxygen, sensed by an oxygen sensor, as a digitalized numerical value on a display portion so that a user may readily recognize a current oxygen purity, and to drive the compressor at a low power consumption based on a discharge flow rate of oxygen and thereby reduce the power consumption.
    Type: Grant
    Filed: September 7, 2007
    Date of Patent: May 19, 2009
    Assignee: Oxus Co., Ltd.
    Inventors: Tae Soo Lee, Yoon Sun Choi, Young Duck Kim
  • Publication number: 20090084268
    Abstract: A mat member includes inorganic fibers, a first main surface, a second main surface opposite to the first main surface, an edge surface surrounding the first main surface and the second main surface, and an inorganic fiber scattering reduction unit. The inorganic fiber scattering reduction unit is provided on at least a part of the edge surface of the mat member and configured to reduce scattering of the inorganic fibers.
    Type: Application
    Filed: April 18, 2008
    Publication date: April 2, 2009
    Applicant: IBIDEN CO., LTD.
    Inventor: Kenzo Saiki
  • Publication number: 20090044705
    Abstract: This invention can provide the apparatus for collecting smoke and dust with a deodorizing function which has an excellent capability of maintenance, an improved deodorizing and silencing effect. The apparatus is comprised of: a bulkhead having an opening and disposed in the housing to separate a space for deodorizing and filtering exhaust gas from a space for discharging exhaust gas, a vacuuming means for vacuuming the exhaust gas disposed in the space for discharging and communicated with the opening of the bulkhead, a filtering means for filtering the exhaust gas disposed in the space for deodorizing and filtering and communicated with the vacuuming means through the opening of the bulkhead, and a deodorizing means for deodorizing the exhaust gas concentrically disposed at the outer side of the filtering means.
    Type: Application
    Filed: April 17, 2006
    Publication date: February 19, 2009
    Inventors: Keisuke Takayanagi, Tomoyuki Suzuki, Hidenori Ikeno
  • Patent number: 7481860
    Abstract: A cyclonic separator/collector device for a suction cleaner, comprising a housing and at least one cyclonic separator disposed within the housing, the or each cyclonic separator having a cyclone body with a circumferential wall of which at least a major part is spaced from the housing; the space between the housing and wall of the cyclone body(s) receiving separated dust from the cyclonic separator(s); wherein the space between the cyclone body and the housing includes a sound-insulating material. The arrangement provides sound insulation for the cyclonic separators.
    Type: Grant
    Filed: November 14, 2005
    Date of Patent: January 27, 2009
    Assignee: VAX Limited
    Inventor: Bengt Ivar Anders Ivarsson
  • Patent number: 7247180
    Abstract: An auxiliary dust collection system can be interposed between a sander or other dust producing tool and a vacuum source, e.g., shop vacuum. A cyclonic separator is connected by a flexible hose to the tool and by another hose to the vacuum source. The cone of the separator is mounted onto the lid of a drum into which the dust precipitates. For a tool that has its own blower, the vacuum source can be omitted, and the air leaving the outlet duct of the separator can be filtered and returned to the ambient. A drop in silencer formed of a sleeve or tube of acoustic foam can be positioned into the inlet side of a filter cartridge following a cyclonic separator. The silencer absorbs a significant fraction of the process noise. The acoustic foam can have a textured surface on the sound-facing side.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: July 24, 2007
    Assignee: Oneida Air Systems, Inc.
    Inventor: Jeffrey M. Hill
  • Patent number: 7141101
    Abstract: A filter assembly configured for acoustic dampening for use with compressor assemblies such as oxygen concentrators including a compartmented housing member having an inlet opening, an outlet opening, a filter member, and a plurality of noise attenuating members positioned and located therewithin. The configuration of the compartmented housing member in conjunction with the positioning and location of the filter member and the noise attenuating members therewithin all contribute to absorb and dissipate any sound waves generated within the housing member due to air flow movement therethrough. This substantially reduces and minimizes noise associated with the present filter assembly.
    Type: Grant
    Filed: June 17, 2004
    Date of Patent: November 28, 2006
    Assignee: Home Health Medical Equipment Incorporated
    Inventor: Harold P. Amann
  • Patent number: 6932188
    Abstract: A silencer for a vacuum cleaner is provided and includes at least one hermetic expansion chamber mounted in an exhaust channel of the vacuum cleaner and allowing an exhaust airflow from the vacuum cleaner to pass through. The expansion chamber at its two sides has an inlet and an outlet connected to the exhaust channel. A silencing board is mounted in the expansion chamber, separating the inlet from the outlet. Pores are distributed throughout in the silencing board. The silencer integrates several different silencing structures together, and, when mounted to the exhaust port of the vacuum cleaner, can considerably diminish the noise generated by the vacuum cleaner in operation.
    Type: Grant
    Filed: December 2, 2003
    Date of Patent: August 23, 2005
    Assignee: Suzhou Kingclean Floorcare Co., Ltd.
    Inventor: Zugen Ni
  • Publication number: 20040211321
    Abstract: An air extraction and treatment unit is located above a source of contaminated air. The apparatus has a series of ultraviolet tubes for treating the decontaminated air. The unit is arranged such that in use substantially no direct or reflected ultraviolet light is visible from outside the unit. Furthermore even when a removable filter is removed, there is no direct line of sight to the ultraviolet source. The unit further has a first switch being disposed between a first filter and the unit. The first switch modulates the ultraviolet tubes between at least a first condition and a second condition.
    Type: Application
    Filed: January 7, 2004
    Publication date: October 28, 2004
    Applicant: VENT MASTER (EUROPE) LTD.
    Inventor: Phillip George Gibson
  • Patent number: 6780534
    Abstract: A filter assembly for removing particulate contaminants and chemical contaminants from an incoming dirty air stream for a fuel cell. The filter assembly also includes a noise suppression element that reduces noise emanating from any equipment, such as a compressor. The filter assembly can include a particulate filter portion for removing physical or particulate contaminants, a chemical filter portion for removing chemical contaminants, or can have both portions.
    Type: Grant
    Filed: April 11, 2001
    Date of Patent: August 24, 2004
    Assignee: Donaldson Company, Inc.
    Inventors: Elvind Stenersen, William Michael Nyman, Richard Thomas Canepa
  • Publication number: 20040065206
    Abstract: Air filter assemblies comprise an air filter housing an air flow passageway extending therethrough, and a connection flange to facilitate attachment with an air filter member. The air filter member comprises an annular air filter element disposed concentrically around the housing. The filter member has a closed top at one end and a retaining band at an opposite band that includes a connection base that is configured to attach with the housing connection flange. An attachment assembly is positioned over the housing connection flange and air filter member connection base to releasibly attach the air filter member to the air filter housing. An O-ring seal is interposed between the air filter housing and member to provide a leak-tight fit therebetween. A sound attenuating chamber is disposed within the assembly to control unwanted intake air noise therein. A vacuum monitor can be attached to the assembly to assessing the remaining service life of the air filter element without need for visually inspection.
    Type: Application
    Filed: October 4, 2002
    Publication date: April 8, 2004
    Inventor: Robert A. Walker
  • Patent number: 6702880
    Abstract: An improved inlet silencer/filter for an oxygen concentrator includes a HEPA filter and an adjoining chamber for receiving air flow from the HEPA filter. The chamber is surrounded on one face by the HEPA filter, and by sound absorbing padding on at least 4 other faces. Air is forced from the HEPA filter, through the open chamber and then through the sound absorbing padding by a flow restrictor plate. Air flows from here through air channels and into an open chamber leading to an outlet from the air silencer/filter.
    Type: Grant
    Filed: May 17, 2002
    Date of Patent: March 9, 2004
    Assignee: Porous Media Corporation
    Inventors: Keith Roberts, Chaouki Khamis
  • Patent number: 6680028
    Abstract: A portable air purifier system and apparatus which includes a multi-element filter pack that is replaceable as a single unit, thus facilitating health safety of maintenance personnel. By serially disposing filter elements in order of descending sizes of particulates, filtering is improved. Selectably includable within the filters are materials that are particularly efficacious in removing contaminants such as acetone, ammonia, ozone, carbon monoxide, carbon dioxide, ethanol, methane, ethane, methanol, formaldehyde, hydrogen sulfide and other hazardous substances. By including an ultra-violet light source directed onto an activated charcoal layer, germicidal action is facilitated, and noise is abated through the advantageous employment of an expanded plenum and multiple right angle bends in air passageways.
    Type: Grant
    Filed: December 8, 1999
    Date of Patent: January 20, 2004
    Assignee: Clean Air Research & Engineering, Inc.
    Inventor: Charles D. Harris
  • Publication number: 20030213368
    Abstract: An improved inlet silencer/filter for an oxygen concentrator includes a HEPA filter and an adjoining chamber for receiving air flow from the HEPA filter. The chamber is surrounded on one face by the HEPA filter, and by sound absorbing padding on at least 4 other faces. Air is forced from the HEPA filter, through the open chamber and then through the sound absorbing padding by a flow restrictor plate. Air flows from here through air channels and into an open chamber leading to an outlet from the air silencer/filter.
    Type: Application
    Filed: May 17, 2002
    Publication date: November 20, 2003
    Inventors: Keith Roberts, Chaouki Khamis
  • Patent number: 6626984
    Abstract: An apparatus for removing dust and fumes from a flow of air, particularly a flow of air exhausted from an industrial work area. There is a large, cylindrical filter element mounted within a cylindrical collector barrel so as to define an annular flow space between the two. A vane assembly is mounted at the top of the collector barrel for directing the incoming flow of air along a generally cyclonic path through the flow space, so that sparks and heavy particulates are forced outwardly away from the surface of the filter element, thereby increasing filter life and reducing the chance of fire. The filter element and collector barrel are mounted atop a cabinet which encloses a blower and a silencer section. The silencer section includes one ore more chambers having interior walls for redirecting the flow of air exiting the blower, and the walls are lined with an acoustic insulation material for absorbing sound energy as the flow of air is redirected, thus reducing noise emissions from the assembly.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: September 30, 2003
    Assignee: FSX, Inc.
    Inventor: R. Drew Taylor
  • Patent number: 6503303
    Abstract: An enclosure for an air aspirating machine, such as a compressor 11 for a fuel cell drive 13, which represents a closed volume, so that said volume can be used acoustically for the air that is being drawn in. An air intake 17 is extended into the enclosure 12, which is made of a sound damping and absorbing material 18, so that the resonant cavity 19 acts as a series resonator. The air is drawn in via an air inlet 21 of the compressor 11. Alternatively, the resonant cavity can also be used as a parallel resonator in that the intake path for the air is sealed within the enclosure 12 and is provided only with sound communicating openings to the resonant cavity.
    Type: Grant
    Filed: April 23, 2001
    Date of Patent: January 7, 2003
    Assignee: Filterwerk Mann & Hummel GmbH
    Inventor: Rolf Fuesser
  • Patent number: 6497753
    Abstract: A device for cleaning gases includes a housing and a plurality of electrostatic filter units. Each of the filter units have a tube-shaped covering, and the housing has an intake opening at one end and an outlet opening at the other end for gas flow. The filter units have an essentially airtight arrangement within the housing. The filter units combine to form a filter assembly arranged inside the housing such that the assembly can be inserted and removed from the housing in one piece.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: December 24, 2002
    Assignee: Baltic Metalltechnik GmbH
    Inventor: Rudolf Gutmann
  • Patent number: 6451097
    Abstract: An air treatment plant includes a waste gas vent connected to structure (50) for attenuating the noise conducted by this waste gas. The noise attenuation structure (50) is a substantially closed and at least partially buried enclosure (52). The invention applies especially to plants for separating air by pressure swing adsorption.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: September 17, 2002
    Assignee: L'Air Liquide Societe Anonyme a Directoire et Conseil de Surveillance pour l'Etude et l'Exploitation des Procedes Georges Claude
    Inventors: Philippe Andreani, Christian Berta, Thomas Wellnitz
  • Patent number: 6361590
    Abstract: A portable air cleaner including a housing defining an air inlet, an air outlet, and an air flow path therebetween, a centrifugal blower retained within the air flow path and operable to draw air through the inlet and a filter retained within the housing and disposed to transmit air circulating in the air flow path out of the outlet. Also included is a conveyor surrounding the blower and defining a scroll shaped passage having one end disposed to receive air from the blower and an opposite end disposed to discharge air into the filter, the conveyor being shaped and arranged to obstruct all rectilinear paths between the blower and the opposite end.
    Type: Grant
    Filed: January 14, 2000
    Date of Patent: March 26, 2002
    Assignee: Honeywell International Inc.
    Inventors: Duane L. Gilbert, Jr., Stephen M. Gatchell
  • Publication number: 20020002906
    Abstract: An enclosure for an air aspirating machine, such as a compressor 11 for a fuel cell drive 13, which represents a closed volume, so that said volume can be used acoustically for the air that is being drawn in. An air intake 17 is extended into the enclosure 12, which is made of a sound damping and absorbing material 18, so that the resonant cavity 19 acts as a series resonator. The air is drawn in via an air inlet 21 of the compressor 11. Alternatively, the resonant cavity can also be used as a parallel resonator in that the intake path for the air is sealed within the enclosure 12 and is provided only with sound communicating openings to the resonant cavity.
    Type: Application
    Filed: April 23, 2001
    Publication date: January 10, 2002
    Inventor: Rolf Fuesser
  • Patent number: 6296692
    Abstract: An air cleaning apparatus provides a housing with a column shape and an air cleaning unit within a portion of the housing, the cleaning unit having a complementary shape. The air inlet and outlet nozzles to the housing are provided at a top and bottom face, with the inlet and outlet openings to the air cleaning unit corresponding with the housing nozzle inlets and outlets locations. However, the air cleaning unit inlet and outlet openings are displaced from the nozzle inlets and outlets.
    Type: Grant
    Filed: February 10, 1998
    Date of Patent: October 2, 2001
    Inventor: Rudolf Gutmann