Shunt Means For Total Flow Patents (Class 55/314)
  • Patent number: 10428707
    Abstract: A system and method for particulate matter reduction. A diesel particulate filtration system includes an inlet, an outlet, an exhaust path between the inlet and the outlet, a diesel particulate filter positioned in the exhaust path between the inlet and the outlet, and a bypass valve, wherein the diesel particulate filtration system is configured to have a diesel engine operatively coupled to the inlet. The bypass valve being configured to open when a maximum allowable engine backpressure is exceeded. When the bypass valve is closed, exhaust gas including particulate matter passes through the diesel particulate filter. When the bypass valve is open, a portion of the exhaust gas passes through the diesel particulate filter and the remainder of the exhaust gas passes through the bypass valve and at least 40 percent of said particulate matter is removed from said exhaust gas.
    Type: Grant
    Filed: February 25, 2014
    Date of Patent: October 1, 2019
    Assignee: Southwest Research Institute
    Inventors: Steven G. Fritz, John C. Hedrick
  • Patent number: 10016713
    Abstract: A vacuum installation includes a vacuum chamber having an inlet for aspirating a quantity of liquid or particulate material. A cyclone separation unit including a plurality of cyclones, communicating in parallel with the interior of the vacuum chamber is connected to a vacuum pump to draw air from the vacuum chamber through the cyclones and induce a separating vortex flow within the cyclones. A controller is arranged to control the vacuum pump to provide a chosen flow rate and to selectively deactivate one or more of the cyclones according to the chosen flow rate.
    Type: Grant
    Filed: March 17, 2016
    Date of Patent: July 10, 2018
    Assignee: KOKS GROUP B.V.
    Inventor: Nic Spierdijk
  • Publication number: 20140366494
    Abstract: A fluid filter with a housing, a releasable cover, and a replaceable filter having a filter body and two end discs. The filter is plugged onto a housing pipe and a locking ring is guided on the pipe, preloaded in a push-out direction. The locking ring is locked in a pushed-out position by a locking device. An unlocking device guided by the filter unlocks the locking device when the filter is pushed onto the pipe and enables the locking ring and the filter to be pushed in. When the filter is fitted into the housing, a seal on the end disc or locking ring interacts with a housing sealing surface to separate an untreated filter side from a clean side. When the locking ring is in the pushed-out position and the filter bears against the locking ring, the seal is held away from the sealing surface of the housing.
    Type: Application
    Filed: October 31, 2011
    Publication date: December 18, 2014
    Inventor: Wilhelm Ardes
  • Patent number: 8663370
    Abstract: An engine crankcase breather for oil segregation, from blow-by gases, in an engine. The engine crankcase breather includes a housing with an inlet located in a downstream direction of the blow-by gases and an outlet. The breather also includes a baffle within the housing which poses a tortuous path for the blow-by gases, in order to segregate oil particles from the blow-by gases. The baffle includes a hook-shaped portion, in which the oil segregation takes place. The engine crankcase breather further includes a trough extending within the housing. The trough is aligned with the hook-shaped portion of the baffle, to collect the segregated oil from the blow-by gases.
    Type: Grant
    Filed: May 23, 2011
    Date of Patent: March 4, 2014
    Assignee: Caterpillar Inc.
    Inventors: Seth E. Slaughter, Arthur S. Lindell, Kathleen Nackers, Ronald P. Maloney
  • Patent number: 8652242
    Abstract: A dust collection device includes a machine body that forms an air chamber and a chassis arranged below the machine body. The chassis receives therein a dust collection tank. A mechanics case that contains a motor and blower assembly is arranged at one side of the machine body. The mechanics case includes a partition board to divide the mechanics case into an inlet flow channel communicating the air chamber and an outlet flow channel for discharging air. The partition board forms an air vent hole in communication with the outlet flow channel. A block unit is provided on the partition board and includes a block plate that selectively blocks the air vent hole. When a fire occurs inside the air chamber, the partition board prevents the fire flame from being drawn into the mechanics case, and the block plate timely blocks the air vent hole to improve operation safety.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: February 18, 2014
    Inventor: Chun-Hsiang Wang
  • Patent number: 8444729
    Abstract: An exhaust particulate filter for an engine system includes an array of filter cartridges positioned within a shell, each of the cartridges having an electrically powered heating element coupled therewith. Exhaust gases may be distributed among the cartridges according to a single distribution pattern, and the filter can be regenerated without diverting, dividing or bypassing exhaust gases from the filter. The filter cartridges may be cylindrical or wedge-shaped, or of a variety of other configurations. Regeneration may take place according to a non-axial regeneration propagation profile. Other aspects include feedback control and feedforward control of regeneration based on sensing an electrical resistance property of each of the electrically powered heating elements.
    Type: Grant
    Filed: July 15, 2009
    Date of Patent: May 21, 2013
    Assignee: Caterpillar Inc.
    Inventors: Brett M. Bailey, Clifford E. Cotton, Christopher J. Rynders, Jr., Michael J. Readey, Michael J. Pollard, Robert L. Meyer
  • Patent number: 8349061
    Abstract: Disclosed are coalescer systems for coalescing a liquid phase dispersed in a gas phase. The disclosed systems include a filter element which, when installed in the system, contacts and moves a valve to an open drainage position to permit flow of liquid through the system. In the disclosed systems, the filter element and valve also are configured such that under excess pressure conditions the valve permits the gas phase to bypass filter media of the filter element. In particular, the disclosed coalescer systems may be utilized in a CV system in order to remove oil mist from gas in the CV system.
    Type: Grant
    Filed: November 16, 2010
    Date of Patent: January 8, 2013
    Assignee: Cummins Filtration IP Inc.
    Inventors: Benjamin L. Scheckel, Bradley A. Smith, Chirag D. Parikh
  • Patent number: 8252081
    Abstract: A water dissipation device for removing water vapor or moisture from a breathing circuit is provided, including an upper lid portion, an entry port and an exit port. An outer cover structure extends from the upper lid portion to define an enclosed volume. An inner frame extends from the upper lid portion inside the outer cover structure. The outer cover structure includes a first layer of water or moisture wicking material and a second layer of water vapor breathable medium, and has an inner surface area bounding an inner flow space such that water vapor or moisture can permeate from the inner flow space through the outer cover structure out of device. The device can include an inner cup structure extending from the upper lid portion into the enclosed volume to displace the enclosed volume and define and bound a portion of the inner flow space and compressible volume therein.
    Type: Grant
    Filed: August 11, 2009
    Date of Patent: August 28, 2012
    Assignee: Teleflex Medical Incorporated
    Inventors: Gary James Roth, Daniel Patrick Dwyer, Jorge Jimenez Perez, Jarred Gabriel DeVille, Jason David Foushee
  • Patent number: 8234874
    Abstract: A method of assembling an inlet air filter assembly for use with a turbine engine system. The method includes coupling an inlet hood to an air filter enclosure, such that an airflow path is defined between the inlet hood and the air filter enclosure. A pre-filter is coupled to the inlet hood, such that the pre-filter is positioned within the airflow path. A filter bypass assembly is coupled to the pre-filter for moving the pre-filter from an operating position to a bypass position during operation of the turbine engine system.
    Type: Grant
    Filed: October 9, 2009
    Date of Patent: August 7, 2012
    Assignee: General Electric Company
    Inventors: Siddharth Upadhyay, Rahul J. Chillar
  • Patent number: 8236081
    Abstract: An embodiment in accordance with the present invention provides a water dissipation device to remove water vapor from a humidified gas traveling through a breathing circuit between a patient and a ventilator, or a ventilator and a patient. The present invention includes a water dissipation device having a housing defining entry and exit ports for coupling to the breathing circuit and a breathable medium permeable to water vapor and impermeable to liquid water bacteria, viruses and other gases enclosed within said housing.
    Type: Grant
    Filed: July 17, 2007
    Date of Patent: August 7, 2012
    Assignee: Teleflex Medical Incorporated
    Inventors: Gary James Roth, Daniel Patrick Dwyer
  • Patent number: 7648564
    Abstract: An air bypass system for a gas turbine inlet filter house having a power augmentation system. The air bypass system may include a duct positioned on the inlet filter house about the power augmentation system and a damper positioned within the duct so as to open and close the duct.
    Type: Grant
    Filed: June 21, 2006
    Date of Patent: January 19, 2010
    Assignee: General Electric Company
    Inventors: Rahul J. Chillar, Raub Warfield Smith, Alston Ilford Scipio
  • Patent number: 7625437
    Abstract: A cartridge of an air dryer serves for cleaning compressed air to be used in compressed air supply systems of motor vehicles, especially trucks. The cartridge includes a housing, a pre-filter, a deposit chamber, a coalescing filter, a bypass conduit and a check valve. The deposit chamber is located downstream of the pre-filter. The deposit chamber is filled with a treating substance. The coalescing filter is arranged between the pre-filter and the deposit chamber. The bypass conduit is designed and arranged to bypass the coalescing filter and not to bypass the pre-filter. The check valve is arranged in the bypass conduit in a way that it opens during regeneration of the cartridge.
    Type: Grant
    Filed: December 9, 2005
    Date of Patent: December 1, 2009
    Assignee: Haldex Brake Products GmbH
    Inventor: Siegfried Heer
  • Patent number: 7326269
    Abstract: A filtration unit for use with an environmental control unit (ECU), usually a portable ECU, which includes at least two air flow paths wherein at least one of the air flow paths allows for use of air which has not passed through a nuclear, biological, and chemical (NBC) filter and at least one other does. The filtration unit may have at least three air paths, at least two of which provide NBC filtered air. This filtration unit can provide for longer expected operational life before filter replacement is required in both contaminated and non-contaminated environments. Further, the filtration unit may include remote sensing and control apparatus allowing for quick switching between operational modes depending on the need for filtered vs. unfiltered air and for a decreased reliance on personnel for maintenance and control, and a more simplified setup.
    Type: Grant
    Filed: February 2, 2004
    Date of Patent: February 5, 2008
    Assignee: Engineered Support Systems, Inc.
    Inventors: John Wootton, Asdrubal Garcia-Ortiz
  • Publication number: 20070294984
    Abstract: An air bypass system for a gas turbine inlet filter house having a power augmentation system. The air bypass system may include a duct positioned on the inlet filter house about the power augmentation system and a damper positioned within the duct so as to open and close the duct.
    Type: Application
    Filed: June 21, 2006
    Publication date: December 27, 2007
    Applicant: GENERAL ELECTRIC COMPANY
    Inventors: Rahul J. Chillar, Raub Warfield Smith, Alston Ilford Scipio
  • Patent number: 6976488
    Abstract: The present invention provides a heat and moisture exchange (HME) unit that includes a housing having a fibrous media in the housing that is designed to absorb and retain moisture and heat from exhaled air passing through the housing. The HME unit is designed to transfer the moisture and heat to inhaled air passing through the HME unit. The HME unit has an internal bypass in the housing to enable air to pass through the heat HME unit without passing through the fibrous media. The present invention also provides a breathing circuit that includes a medication bypass HME unit, a medication treatment device and a ventilator that is connected in a closed system.
    Type: Grant
    Filed: October 30, 2002
    Date of Patent: December 20, 2005
    Assignee: Allegiance Corporation
    Inventor: Scott Halperin
  • Patent number: 6918952
    Abstract: A quick-change filter system provided with at least one base and at least one quick-change filter, which base is provided with a filter coupling provided with a gas inlet stub for connection to an inlet of the filter and with a gas outlet stub for connection to an outlet of the filter, the filter being provided with a housing, which is at least partly filled with filter material and to which the inlet and the outlet are connected, and with a quick-change coupling arranged for cooperation with the filter coupling of the base, the coupling containing the inlet and the outlet of the filter, the base being provided with a mechanism for manually connecting the filter to the base, and being provided with a sealing mechanism for automatic, gastight sealing of the gas outlet stub and the gas inlet stub when decoupling the filter from the base.
    Type: Grant
    Filed: May 30, 2003
    Date of Patent: July 19, 2005
    Assignee: SGT Singapore Holdings Pte Ltd.
    Inventor: Marinus Frans van der Maas
  • Patent number: 6319296
    Abstract: An oil separator such as used in an air charging system includes a bypass assembly. During normal operation, airflow from an inlet to an outlet passes through the filter to remove oil and oil vapor from the compressed air. If a restriction or blockage occurs in the filter, as exhibited by a predetermined pressure differential across the filter, a bypass passage is opened to allow direct communication between the inlet and outlet ports. A spring defines the pressure responsive member that allows the filter to move away from the valve seat and establish communication between the inlet and outlet ports of the housing.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: November 20, 2001
    Assignee: AlliedSignal Truck Brake Systems Company
    Inventor: William P. Fornof
  • Patent number: 6293321
    Abstract: A wood planing machine includes a base, a cutter carriage, a motor housing mounted on the cutter carriage and having a vent port, a motor disposed in the motor housing, a rotary cutter mounted on the cutter carriage, a shaft extending from the rotary cutter and driven by the motor, a blower mounted on the cutter carriage and having a fan driven by the shaft, a sawdust-guiding member mounted on the cutter carriage and having a box and a rear spout extending from the box to the rotary cutter to define a sawdust passageway, an air duct in fluid communication with the vent port of the motor housing and the box, a first conduit in fluid communication with the blower housing and the box, a second conduit in fluid communication with the blower housing, and a sawdust collector in fluid communication with the second conduit.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: September 25, 2001
    Inventor: Pei-Lieh Chiang
  • Patent number: 6149729
    Abstract: A film forming apparatus includes a chamber in which a thin film is formed on a semiconductor wafer by supplying a process gas, the interior of which is then cleaned by a cleaning gas, while the gas in the chamber is exhausted by a vacuum system.
    Type: Grant
    Filed: May 19, 1998
    Date of Patent: November 21, 2000
    Assignee: Tokyo Electron Limited
    Inventors: Teruo Iwata, Kazuichi Hayashi, Yuichiro Fujikawa, Takashi Horiuchi
  • Patent number: 6010547
    Abstract: Disclosed is a counterflow type filter trap system for filtering particulate matters from engine exhaust gases. A controller for receiving and sending information signals, is included. A metal fiber filter for capturing particulate matters included in the engine exhaust gases is provided. A back pressure sensor for sensing pressure difference between the inlet and the outlet of the metal fiber filter, is formed. A compressed air supplying portion is formed for injecting a compressed air in the opposite direction to the flow of the exhaust gases to separate the captured particulate matters from the metal fiber filter. A particulate matters collecting box for collecting the separated particulate matters and a guiding valve for guiding the separated particulate matters are provided. The life of the filter is lengthened and the apparatus has a simple structure. The filtering efficiency of the exhausted fumes is very high.
    Type: Grant
    Filed: January 13, 1998
    Date of Patent: January 4, 2000
    Assignee: Korea Institute of Machinery and Materials
    Inventors: Young-Il Jeong, Jin-Wook Lee
  • Patent number: 5738706
    Abstract: The smoke filtration unit described herein has an internal cylindrical duct for ducting exhaust smoke from an exhaust flue to a shutter pivotally mounted within the cylindrical duct. The shutter can move between at least two positions. The shutter, when located in a first position, directs exhaust smoke to a cylindrical filter. An exhaust fan draws the exhaust smoke through the filter. The residual gas is vented to the atmosphere. The cylindrical filter is mounted on a vibration mount that can vibrate the filter to dislodge particulate matter that collects on the surface of the filter. The dislodged particulate matter falls into an ash collection area. The smoke filtration unit is controlled by a microcontroller that monitors temperature and pressure conditions within the unit. If excessive pressure conditions are detected, the microcontroller energizes the vibration mount to dislodge particulate matter from the filter.
    Type: Grant
    Filed: March 29, 1996
    Date of Patent: April 14, 1998
    Assignee: Air Resources, Inc.
    Inventors: Gary A. Swanander, Bruce N. Bickford, Michael Balmer
  • Patent number: 5620490
    Abstract: This diesel particulate filter apparatus comprises a main filter, a sub-filter provided in a central portion of the main filter, and a bypass cylinder interposed between the main filter and sub-filter. A filter body constituting the main filter is made of long ceramic fiber, and the surface of the filter body is covered with a metal net, which is then fixed thereto. A heat resisting metal coil is provided on the surface of the filter body which is at the exhaust gas introducing side, and a ceramic fiber twisting is wound around and fixed to the filter body. A bypass valve adapted to be opened and closed by an actuator is provided on an exhaust gas introducing side of the sub-filter, and an admission port of the sub-filter is opened and closed by the bypass valve.
    Type: Grant
    Filed: August 28, 1995
    Date of Patent: April 15, 1997
    Assignee: Isuzu Ceramics Research Institute Co., Ltd.
    Inventor: Hideo Kawamura
  • Patent number: 5458673
    Abstract: For regenerating an exhaust gas particulate collecting filter, there is provided an exhaust gas particulate purifying process in which damage to the filter caused by a thermal action can be prevented and further electric power can be saved when an electric current supply to an electric heater attached to the filter is controlled. In the filter container (4), an electric heater (21) is provided on an end surface of the filter on an upstream side with respect to a regenerating gas flow, or provided at a position close to the end surface. Also, a temperature sensor (22) for measuring a temperature of the filter is provided inside the filter or at a position close to an end surface of the filter opposite to the aforementioned end surface.
    Type: Grant
    Filed: November 26, 1993
    Date of Patent: October 17, 1995
    Assignee: Nippon Soken, Inc.
    Inventors: Akikazu Kojima, Mitsuo Inagaki, Shinji Miyoshi, Fumiaki Arikawa, Takayuki Takeuchi
  • Patent number: 5357755
    Abstract: Trap muffler apparatus with bypass around a trap core is disclosed. A preferred bypass arrangement utilizing a tubular shutter valve system is described. Forward or reverse regeneration are possible. Bypass to atmosphere without filtration is avoided with dual in-line traps or with the segmented trap and control of exhaust gases to traps not being regenerated.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: October 25, 1994
    Assignee: Donaldson Company, Inc.
    Inventors: Gary R. Gillingham, Marty A. Barris, Charles O. Reinhart, Julian A. Imes, Jr., Erland D. Anderson, Peter A. Betts
  • Patent number: 5212948
    Abstract: Trap muffler apparatus with bypass to a common reactive acoustic element is disclosed. Bypass structure varies from external bypass to a common acoustic element to annular bypass of the ceramic filter to axial bypass through the middle of an annular ceramic filter. Forward or reverse regeneration are possible. Bypass to atmosphere without filtration is avoided with dual in-line traps or with the segmented trap and control of exhaust gases to traps not being regenerated.
    Type: Grant
    Filed: September 27, 1990
    Date of Patent: May 25, 1993
    Assignee: Donaldson Company, Inc.
    Inventors: Gary R. Gillingham, Marty A. Barris, Charles O. Reinhart, Julian A. Imes, Jr., Erland D. Anderson
  • Patent number: 5174797
    Abstract: A fiber collector collects fiber from a moving airflow having entrained fibers. A primary plenum has a fiber collection zone in its lower portion. Adjacent screens downstream of the primary plenum are slanted with respect to the primary plenum so that fiber held by the screens will be gravitationally attracted to the fiber collection zone. Secondary plenums downstream of the screens have independently openable air inlets and independently closable passages. A fan downstream of the passages pulls air through the primary plenum, screens, secondary plenums and passages. Pressure sensors upstream of the screens and downstream of the passages provide pressure sense data to a control means which closes the passages for one of the secondary plenums and opens the independently openable air inlet of the same secondary plenum when the pressure difference between the first and second pressure sensors exceeds a desired range.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: December 29, 1992
    Assignee: Industrial Air, Inc.
    Inventors: Randall L. Yow, Sr., Gary Jansen
  • Patent number: 5050487
    Abstract: In a heating/air conditioning system for a motor vehicle, with an exchangeable and selectively bypassable absorption filter which is arranged in a channel shaped housing and through which fresh air and/or circulating air can flow, a high degree of absorption is achieved when unprocessed air passing through internal leakage points at the absorption filter holder and the shut off bypass line of the absorption filter is collected and conveyed, via at least one line, to a location which is separated from the passenger space and the pressure level of which is lower than the pressure level on the flow off side of the absorption filter. Untreated air, which in certain circumstances escapes through external leakage points of a housing partition, is guided outside the passenger space, at the same time being prevented from overflowing into the latter.
    Type: Grant
    Filed: November 8, 1989
    Date of Patent: September 24, 1991
    Assignee: Daimler-Benz AG
    Inventors: Klaus Arold, Heinz Koukal, Hans Trube, Karlheinz Witzel, Wolfgang Volz
  • Patent number: 5048287
    Abstract: An exhaust processor is provided for filtering particulate matter from a combustion product. The exhaust processor includes a housing providing a main passageway having a substrate mounted therein for solid particle filtration. The housing also provides an auxiliary passageway containing a muffler for attenuating noise of combustion product. Combustion product is diverted through the auxiliary passageway after the substrate collects a predetermined amount of solid particles from combustion product to permit regeneration of the substrate by a burner.
    Type: Grant
    Filed: June 19, 1990
    Date of Patent: September 17, 1991
    Assignee: Arvin Industries, Inc.
    Inventors: Michael G. Howe, James C. Arthur, Robert T. Usleman
  • Patent number: 5009065
    Abstract: An exhaust processor is provided for filtering particulate matter from a combustion product. The exhaust processor includes a partition situated inside a housing to form a first flow passage and a second flow passage in an upstream portion of the housing. A main substrate is mounted in the first flow passage for solid particle filtration. An auxiliary substrate is situated in the second flow passage to filter combustion product passing through the second flow passage during regeneration of the main substrate. A muffler is situated in a downstream portion of the housing and is arranged so that the entire spacial volume of the muffler can be utilized by combustion product passing through either the first or second flow passages.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: April 23, 1991
    Assignee: Arvin Industries, Inc.
    Inventors: Michael G. Howe, James C. Arthur, Robert T. Usleman
  • Patent number: 4961314
    Abstract: An exhaust processor is provided for filtering particulate matter from a combustion product. The exhaust processor includes a partition situated inside a housing to form a filtering region and a bypass region in an upstream portion of the housing. A substrate is mounted in the filtering region for solid particle filtration. A muffler is situated in a downstream portion of the housing spaced apart from the partition so that the entire spacial volume of the muffler can be utilized by combustion product passing through either the filtering region or the bypass region.
    Type: Grant
    Filed: March 6, 1989
    Date of Patent: October 9, 1990
    Assignee: Arvin Industries, Inc.
    Inventors: Michael G. Howe, James C. Arthur, Robert T. Usleman
  • Patent number: 4945722
    Abstract: A soot filtering unit in the exhaust gas system of a diesel internal combustion engine that includes at least two parallel soot filters. For regeneration, a regeneration device, having at least one burner and control flap, is provided upstream from the soot filters of the soot filtering unit. The burner(s) provided in the soot filtering unit supplies high temperature gases for the regeneration of the soot filters, and exhaust gas from the exhaust gas pipe is fed thereto as an oxygen carrier for the combustion process. According to a first embodiment, a single burner is provided for all soot filters to be regenerated and the burner does not lie directly in the pipes of the exhaust gas pipe that conveys exhaust gas to the soot filters. Preferably, exhaust gas is supplied to the burner(s) through separate exhaust gas feed pipes but, alternatively, a separate burner can be located directly in each branch of the exhaust pipe upstream of the respective soot filter provided therein.
    Type: Grant
    Filed: May 20, 1988
    Date of Patent: August 7, 1990
    Assignee: Webasto AG Fahrzeugtechnik
    Inventor: Dieter Goerlich
  • Patent number: 4940213
    Abstract: An exhaust processing apparatus comprises a cracking furnace for cracking and solidifying exhaust discharged from a reactor for forming crystals on a semiconductor substrate, a first collecting device for collecting relatively large components solidified in the cracking furnace, a second collecting device for collecting relatively small solidified components passed through the first collecting device, and a chemical or a physical adsorbing member for chemically or physically adsorbing the exhaust passed through the first and second collecting devices.The apparatus may be provided with bypass piping for bypassing a particular section of the apparatus, a shutoff member for opening and closing the bypass piping and a control device for controlling the shutoff member.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: July 10, 1990
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshimitsu Ohmine, Takaaki Honda, Keiiti Akagawa
  • Patent number: 4906257
    Abstract: A method of and apparatus for treating waste gas from semiconductor manufacturing equipment with a dry solid absorbent. A bypass pipe which is equipped with a bypass valve is provided between inlet and outlet pipes of a container packed with the absorbent, and when a reaction chamber of the semiconductor manufacturing equipment is evacuated to a level below that of atmospheric pressure, the bypass valve is opened to prevent the large amount of non-toxic gas that is discharged from the reaction chamber during the evacuation from being fed to the absorbent-packed container. Large variations in the flow rate of the gas are thus avoided and safe and efficient waste gas treatment with a dry solid absorbent having a relatively small particle diameter is possible.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: March 6, 1990
    Assignee: Takeda Chemical Industries, Ltd.
    Inventors: Akira Fukunaga, Manabu Tsujimura, Ohsato, Masaaki
  • Patent number: 4895644
    Abstract: A fluid recirculation and makeup supply system having an alternate purification loop (84) in parallel with a portion of the recirculation loop (26). In the alternate purification mode of operation of the system a predetermined portion of the recirculated fluid is drawn through the purification loop (84) in parallel with a flow of the remainder of the recirculated fluid through the normal parallel recirculation flow path (86). The volume of fluid drawn through the purification path (84) is established to maintain the purification loop operating at its maximum efficiency. A makeup fluid supply loop (24) having a normal flow path (42) and an alternate, parallel filtration flow path (50), communicates with the recirculation loop (26).
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: January 23, 1990
    Assignee: Westinghouse Electric Corporation
    Inventor: Thaddeus T. Porembski
  • Patent number: 4875336
    Abstract: An exhaust gas emission control device comprising a filter provided in the exhaust passage, a heater provided near the filter, first and second passage bypassing the filter and the heater, a single first valve upstream of the filter a single second valve downstream of the filter, and a controller controlling the first and the second valve. When trapping particles, one of or both of the first and second valves closes the first and second passages, and the first and second valves open the exhaust passage, whereby exhaust gas flows through the filter and the heater. On the other hand, when regenerating the filter, the heater is switched ON, the first valve shuts the exhaust passage and the second valve is open to a predetermined degree, so that exhaust gas flows into the first passage, and a part of the exhaust gas flowing via the first passage flows through the heater, the filter, and the second passage.
    Type: Grant
    Filed: December 28, 1988
    Date of Patent: October 24, 1989
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kotaro Hayashi, Sumio Ito, Kiyoshi Kobashi
  • Patent number: 4747853
    Abstract: A pressure control arrangement for a fluid line in a system, particularly a pressure swing adsorption system, wherein, in the event of a valve or control system malfunction, there is a risk of the fluid line being subject to an overpressure in an excess of its maximum design pressure, has a normally open valve, a flow restricting member, and a pressure sensor disposed in the fluid line.The pressure sensor is disposed upstream of the flow restricting member and arranged to sense the pressure in the line and to actuate the valve to close the line in the event of the sensed pressure exceeding a predetermined limit. The predetermined limit is above the normal operating pressure range of the fluid line but below the maximum overpressure to which there is a risk of the line being subject, and that portion of the fluid line upstream of the flow restricting member is constructed to have a maximum design pressure at least equal to the maximum overpressure.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: May 31, 1988
    Assignee: Imperial Chemical Industries PLC
    Inventors: Andrew M. Haslett, John B. H. Johnson
  • Patent number: 4702269
    Abstract: The present invention is directed to a valve having a plug with a pair of passages therethrough and a housing with ports which communicate with the passages of the plug in at least two orientations to form flow paths through the valve. The valve includes a space located at the interface of the plug and housing which, when pressurized, assures that fluid leakage between the flow paths of the valve is prevented in either the first or second orientation of the valve. In the preferred embodiment of the valve the space is defined by first and second endless paths which are orthogonal to each other and intersect at the poles of the axis of rotation of the plug. Seal members may be disposed along each endless path to further assure the integrity of established flow paths through the valve.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: October 27, 1987
    Assignee: Donaldson Company, Inc.
    Inventor: Fredrick E. Schuler
  • Patent number: 4682993
    Abstract: An air filter system, with a replaceable cartridge, suitable for use in controlled environment systems such as computer information storage and retrieval devices. The system provides ease of maintenance, while providing a highly sanitized air stream to an optical device, over prolonged periods of operation, for temperature control of temperature sensitive areas. The system is comprised of a housing plenum located in the controlled environment system, the housing having a sliding filter tray, a plurality of air flow ports and a spring biased valve gate. When the filter tray is fully inserted in the housing, the valve gate is forced open so that the air flow is into the controlled environment, but when fully retracted the valve gate closes, causing the air to exit the system through an exhaust port.
    Type: Grant
    Filed: May 1, 1985
    Date of Patent: July 28, 1987
    Assignee: Storage Technology Corporation
    Inventors: Christian A. Todd, William D. Hart
  • Patent number: 4674278
    Abstract: A safety exhaust system is provided for an internal combustion engine comprising a device for switching the combustion gases of an internal combustion engine towards one or other of two cases, said device being controlled by a shaft integral with locking means controlled by the positioning of a flame trap assembly on this case.
    Type: Grant
    Filed: May 29, 1986
    Date of Patent: June 23, 1987
    Inventor: Armand Rognon
  • Patent number: 4650572
    Abstract: A filter device for removing fine particles in the fluid line, such as in a power steering system including a housing having an inlet body wall and an outlet body wall connecting respectively with an inlet tube and an outlet tube. A perforated support plate has a valve seat formed around a central opening and is mounted between the inlet body wall and the outlet body wall for separating the housing interior into an inlet chamber and an outlet chamber. The valve seat and a boss on the inlet body wall form a filter relief valve. A filter disc, made of a soft flexible material, is located in intimate contact with the support plate on the inlet chamber side of such plate for filtering the particles from the inlet fluid prior to the passage of the fluid through the filter disc and the holes in the support plate into the outlet chamber.
    Type: Grant
    Filed: May 6, 1985
    Date of Patent: March 17, 1987
    Assignee: Arc Rebuilders, Inc.
    Inventor: William Hayes
  • Patent number: 4581135
    Abstract: A self-cleaning renewable fluid filter that flushes a permanent filter media while the used oil is pumped out by the engine oil pump through a drain in the housing. The fluid filter has an inlet and a drain, a center core with an outlet, a drain valve normally closing the drain, a permanent fluid filter media inbetween the inlet and outlet, a plug for closing the outlet, an actuator for opening the drain valve and an improved bypass valve which bypasses fluid and enables reversal of fluid flow through the filter media during draining for flushing the media. The preferred drain valve actuator is an electric solenoid coil inside of the filter and the improved bypass valve is an annular valve around the center core and inside of a cylinder formed in an inlet end cap of the filter media.
    Type: Grant
    Filed: August 19, 1983
    Date of Patent: April 8, 1986
    Assignee: Henry C. Kova
    Inventor: Benedict R. Gerulis
  • Patent number: 4576619
    Abstract: Dust recovery apparatus is disclosed which recovers air-entrained dust in a high state of purity. The apparatus comprises a housing capable of sustaining at least slight positive pressure and suitable for accommodating powder processing machinery, an air supply system for passing air at a predetermined rate and at a slight positive pressure to the housing, a collector which collects dust entrained in air leaving the housing and an air-flow rate sensor which detects air-flow rate in the apparatus and activates valves for stopping air passing to the collector when the air-flow rate falls outside a predetermined range.
    Type: Grant
    Filed: January 17, 1984
    Date of Patent: March 18, 1986
    Assignee: Smith Kline & French Laboratories Limited
    Inventor: Graham P. Manning
  • Patent number: 4544388
    Abstract: An apparatus is disclosed for regenerating a filter trap used to collect particulates from the exhaust gas of an internal combustion engine. The apparatus comprises: (a) an assembly providing a flow of a heat transfer medium through the filter trap: (b) an assembly for heating the heat transfer medium to a temperature effective to incinerate the particulates in the filter trap: and (c) a flow mask stationed in the flow of heat transfer medium, upstream from said filter trap, effective to divert the heat transfer medium away from the radially inner zone of the filter trap while guiding the heat transfer medium to engage and ignite the particulates along a radially outer region of the filter trap. The mask is a circular disc and spaced upstream from the filter trap effective to mask a central core area of the flow of heat transfer medium.
    Type: Grant
    Filed: December 27, 1983
    Date of Patent: October 1, 1985
    Assignee: Ford Motor Company
    Inventors: Vemulapalli D. N. Rao, Wallace R. Wade
  • Patent number: 4529514
    Abstract: A filter assembly includes a slidable tubular member which in a first position provides for flow communication from an inlet passage through a filter element to a filter chamber outlet. Upon removal of the filter housing and filter element the tubular member is biased to a second position to effect a flow shut off between the inlet passage and the tubular member. The filter assembly may further include an outlet passage in flow communication with the inlet passage, and a valve seat is axially aligned with the tubular member and disposed between the inlet passage and outlet passage. A valve member on the end of the tubular member is engageable with the valve seat to preclude flow between the inlet passage and outlet passage when the tubular member is in the first position and providing for flow communication between the inlet passage and the filter chamber outlet.
    Type: Grant
    Filed: December 19, 1983
    Date of Patent: July 16, 1985
    Assignee: Oil-Rite Corporation
    Inventor: Donald G. Gruett
  • Patent number: 4523931
    Abstract: An internal flue gas bypass system is provided in a baghouse filter system having a plurality of filter compartments each having a gas inlet for receiving particulate-laden gas, a gas outlet for delivering filtered gas, fabric filter means between the gas inlet and the gas outlet, means for selectively blocking the gas inlet of each compartment, a gas inlet manifold connected to a source of particulate-laden gas and to the gas inlet of a plurality of filter compartments, and a gas outlet manifold connected to the gas outlet of a plurality of filter compartments and to a baghouse clean gas outlet. At least a portion of the gas outlet manifold has a common wall with the gas inlet manifold so that the gas outlet manifold is mounted internally in the baghouse adjacent the gas inlet manifold, and at least one poppet damper means is positioned in the common wall thereby providing an internal bypass means for passing particulate-laden gas from the gas inlet manifold to the gas outlet manifold.
    Type: Grant
    Filed: June 9, 1983
    Date of Patent: June 18, 1985
    Assignee: General Electric Environmental Services, Inc.
    Inventors: Richard L. Miller, Carlos Estela
  • Patent number: 4522639
    Abstract: A unified filter and connector housing (24) incorporating a diversion valve assembly (74), the housing assembly being usable with a protective breathing mask assembly (12) of the type requiring separate breathing gas and ventilating gas supply lines (18 and 20). The housing assembly includes first and second housing members (26, 32) which receive therebetween a filter (30) in an airtight relationship. The first housing member is provided with inlets (46, 62) to which quick disconnect supply lines (50, 66) for breathing gases and ventilating gases may be secured. Parallel breathing and ventilating gas passageways (42, 58) are disposed within the first housing member, only the breathing gas passageway normally being in a fluid communication with the filter.
    Type: Grant
    Filed: April 15, 1983
    Date of Patent: June 11, 1985
    Assignee: Figgie International Inc.
    Inventors: William K. Ansite, James H. Ryder
  • Patent number: 4517083
    Abstract: A filter device for use in the return line of a power steering system for filtering the fine metal particles in the power steering fluid, thereby minimizing contamination, reducing friction and maintaining normal fluid temperatures. A perforated support plate is mounted between an upper body wall and a lower body wall for separating the housing interior into an inlet chamber and an outlet chamber. A felt filter disc is located in intimate contact with the support plate on the inlet chamber side of such plate for filtering the particles from the inlet fluid prior to the passage of the fluid through the filter and the holes in the support plate into the outlet chamber. A relief valve is provided by the combination of the aligned central opening in both the support plate and the adjacent filter disc together with a boss in the upper body wall which extends into such central opening in sealing engagement against the filter material for closing off the relief valve opening under normal filtering conditions.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: May 14, 1985
    Assignee: ARC Rebuilders, Inc.
    Inventors: Willliam Hayes, James W. Dohrenwend
  • Patent number: 4509963
    Abstract: A vacuum cleaner and refuse and debris collection and disposal device and system utilizing a vacuum cleaning unit, with intake for both wet and dry materials, utilizing a motor-driven blower to create a vacuum in a sealed vacuum chamber and a separate internal debris collection container which is removable without disturbing the sealing properties of the vacuum chamber. The container is alternatively emptyable or disposable, thereby providing minimal interruption in the operation of the vacuum cleaner unit, no relocation of the unit when dumping is necessary and the use of replaceable, or disposable internal collection containers subject to wear and tear without disturbing the sealing properties of the vacuum chamber.
    Type: Grant
    Filed: January 16, 1984
    Date of Patent: April 9, 1985
    Assignee: Wm. W. Meyer & Sons, Inc.
    Inventor: Carroll V. Jackson
  • Patent number: 4494375
    Abstract: A filtration system is disclosed which removes particulates from the exhaust gas of a diesel engine. The system has (a) a filter element, (b) oxidation means for conducting a flow of heated gas through at least a portion of the filter element, the heated gas being effective to ignite the particulates in that portion, and (c) a flow control means. The flow control means has walls dividing the filter element into first and second portions, and a flow diverter effective to normally permit full exhaust gas flow through both of said filter portions, and effective to selectively permit exhaust glow through only one of the filter portions while permitting flow of heated gas of the oxidation means through the other of said filter portions.
    Type: Grant
    Filed: February 3, 1983
    Date of Patent: January 22, 1985
    Assignee: Ford Motor Company
    Inventors: Vemulapalli D. N. Rao, Wallace R. Wade
  • Patent number: 4478618
    Abstract: A particulate trap for removing particulates from the exhaust flow discharged from a diesel engine comprises a trap housing having an inlet connection and an outlet connection for the exhaust flow, an intermediate filter housing with a support plate positioned between one end of the filter housing and the outlet connection. The support plate is provided with a central one way valve controlled bypass passage extending therethrough and a plurality of closely spaced apart internally threaded apertures therethrough located around the bypass passage. A plurality of filter tubes are operatively supported within the filter housing by the support plate. Each of the filter tubes includes a perforated tube having an externally threaded outlet fitting fixed at one end thereof that is releasably threadingly engaged in an associate one of the apertures in the support plate whereby the perforated tube is supported in cantilever fashion.
    Type: Grant
    Filed: August 1, 1983
    Date of Patent: October 23, 1984
    Assignee: General Motors Corporation
    Inventors: Kenneth B. Bly, Edward J. Chmiel, Ernest T. Martyniuk