With Residue Removing Means Or Agitation Of Liquid Patents (Class 210/407)
  • Publication number: 20030178366
    Abstract: A device for filtering a fluid includes a fiber housing having an inlet end with at least one inlet and an outlet end with at least one outlet. The fiber housing surrounds and defines an outer bound for a plurality of fibers extending longitudinally in the fiber housing between the inlet end and the outlet end, whereby longitudinally extending interspaces is provided between the fibers, with the interspaces defining a plurality of flow passages for the fluid. At least part of the fiber housing is formed of a flexible membrane surrounding the fibers, and a compression tool is provided for creating a pressure on an outer surface of the flexible membrane thereby compressing the fibers in a radial direction at least one location along the length of the fibers.
    Type: Application
    Filed: March 14, 2003
    Publication date: September 25, 2003
    Inventor: Bo Boye
  • Patent number: 6613238
    Abstract: The present invention is a device and method for clearing debris from fluid channels. In one embodiment, the device has a fixed screening member that is permeable in part wherein debris will collect. A movable scraper then scrapes along the screen and removes the debris therefrom and transports the debris to a desired location. In embodiments of the invention, the surface that comprises the screening member may be arcuate, and may be a surface of revolution. Different portions of the screening member may or may not be permeable. The invention may also include an overflow mechanism where overflow water is diverted into a separate unscreened fluid stream. Further, the invention may be suitable for use within a sump.
    Type: Grant
    Filed: April 2, 2002
    Date of Patent: September 2, 2003
    Inventor: Charles M. Schloss
  • Patent number: 6582665
    Abstract: A universal collection and transfer system which includes a collection container, a second container, and a transfer device mateable with both the collection container and the second container and including a hollow shaft which pierces the collection container to transfer a sample in the collection container into the second container.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: June 24, 2003
    Assignee: Biomedical Polymers, Inc.
    Inventor: Michael T. Faulkner
  • Publication number: 20030106850
    Abstract: The invention relates to a filter in particular adapted for micro- and ultrafiltration applications. The filter comprises at least one filter element and a central axis. The filter element comprises at least one sintered and isostatically cold pressed non woven metal fiber web and means for sealing.
    Type: Application
    Filed: October 1, 2002
    Publication date: June 12, 2003
    Inventors: Marc Arnaut, Joan Grabuleda
  • Patent number: 6572763
    Abstract: The present invention is a screening/washing/dewatering system which utilizes a solids handling pump to vacuum solids captured from a contaminated fluid stream from the system's screening mechanism and to convey them, in a concentrated form and through a closed conduit, to the washing/dewatering mechanism. The use of a solids handling pump enables a screening, washing and dewatering system to contain the captured solids in a completely closed system from their point of capture, through a conveyance system of unlimited length and configuration, to the point that the washed, dewatered screenings are finally discharged. Secondarily, the present invention offers the advantages of being able to capture as small of a solids particle size as is desirable and of providing effective washing and dewatering of the captured particles while minimizing the number of moving parts and maximizing the overall system reliability.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: June 3, 2003
    Inventor: Donald B. Gorshing
  • Patent number: 6536601
    Abstract: The invention relates to a silo for sludge, especially sewage sludge, comprising a sludge-receiving part (12), a feeding part (16), said feeding part being located above the sludge-receiving part (12) and communicating with said sludge-receiving part (12) via a inlet (14), and a sludge-discharge device. Said sludge-discharge device is located in the lower area of the sludge-receiving part, and can preferably be connected to a pipeline system. According to the invention, a separator device (18) for removing foreign bodies is located in the area of the feeding part (16) so that the sludge which is temporarily stored in the silo can easily be used later on. Said separating device for removing foreign bodies (18) has a sieve grate (20) covering the inlet (14) and at least one counter-surface (22) positioned above said sieve-grate (20). Said sieve-grate and said counter-surface are able to move in relation to each other as sludge pushes through the sieve openings of said sieve-grate.
    Type: Grant
    Filed: November 10, 1999
    Date of Patent: March 25, 2003
    Assignee: Putzmeister Aktiengesellschaft
    Inventors: Wolfgang Zey, Alexander Schmid
  • Patent number: 6511596
    Abstract: The invention relates to an apparatus comprising a drum drivable in rotation having a conical jacket wall which is mounted on a fixedly arranged core; supply means for carrying the contaminated liquid into the interior of the drum; discharge means for discharging the heavy contaminants from the part of the drum in the proximity of the largest jacket diameter; an at least substantially cylindrical ceramic filter received in the core; and drainage means arranged in the fixed core for draining the cleaned liquid.
    Type: Grant
    Filed: March 7, 2001
    Date of Patent: January 28, 2003
    Inventor: Christianus J. Bogers
  • Publication number: 20030010697
    Abstract: The invention relates to a filter device comprising at least one filter element (32), which can be accommodated inside a filter housing (22). Said filter device also comprises an inlet (16) for a fluid to be cleaned and an outlet (18) for the fluid cleaned by the filter element (32), whereby the filter element (32) is retained by at least one element retainer (106) of the filter housing (22). By virtue of the fact that a closing device (98) seals the interior (34) of the filter element (32) off from the environment when the filter element (32) is removed from the element retainer (106), a filter device is created which is improved with regard to the prior art and which, in particular, simplifies the necessary exchange of the filter element while imposing only a slight burden on the environment.
    Type: Application
    Filed: August 12, 2002
    Publication date: January 16, 2003
    Inventors: Norbert Sann, Volkmar Klein, Jurgen Sticher
  • Patent number: 6503401
    Abstract: An automatic system and process for effectively, reliably and economically reconditioning for direct reuse various waste water, and particularly that in the poultry and other food processing industries, without the use of added chemicals and filter-aid compounds. The system includes water filtration and purification units, the purification unit consisting of an ultra-violet sterilizer. The integrity of the reconditioned water is continuously monitored in-line by sensors, which information is directly correlated to correspond to associated levels of solids and microorganisms. This invention presents a fully automated process to provide reconditioned water essentially free of microorganisms and of acceptable clarity to meet current United States Department of Agriculture regulations for food processing reuse.
    Type: Grant
    Filed: April 11, 2000
    Date of Patent: January 7, 2003
    Assignee: KGF Properties, Inc.
    Inventor: Terry K. Willis
  • Publication number: 20020170863
    Abstract: Carbon dioxide, liberated by introducing fouling inhibiting bubbles into a tank containing an immersed membrane module, is captured and returned to the tank by way of the bubbles to minimize increases in pH in the tank water caused by carbon dioxide stripping. Minimizing the pH increase reduces the amount of acid required to produce a desired pH in the tank water or, with scaling feed water, reduces the rate of membrane fouling.
    Type: Application
    Filed: March 8, 2002
    Publication date: November 21, 2002
    Inventors: Manwinder Singh, Scott Lenhardt
  • Patent number: 6478955
    Abstract: Water to be treated is passed through a membrane (net), magnetic floc positioned in a portion below a level of the water to be treated is deposited to a surface of the membrane, and the surface of the membrane with the magnetic floc deposited is moved to an atmospheric portion above the level of the water to be treated. In the atmospheric portion, excess water from the magnetic floc flows downward due to gravity to concentrate the magnetic floc. A permanent magnet is located near a position to which the membrane surface with the magnetic floc deposited thereon moves. There are further provided between the magnet and the membrane surface a moving body (shell) formed by a non-magnetic material, a spatula for scraping the magnetic floc from the moving body, and a sludge vessel in which a released magnetic floc is recovered.
    Type: Grant
    Filed: November 2, 2000
    Date of Patent: November 12, 2002
    Assignee: Hitachi, Ltd.
    Inventors: Norihide Saho, Hisashi Isogami, Minoru Morita, Tadashi Sano
  • Patent number: 6475397
    Abstract: A back-flushing method is practiced with a back-flushing filter construction wherein a perforate filter screen providing filter openings also forms an internal chamber for receiving the effluent from a liquid stream. A filter piston is disposed in the internal chamber and operates to divide the chamber into first and second zones on opposite sides of the piston. By selectively reciprocating the piston, the effluent in the chamber is compressed and moved on both sides of the piston. Thus, the effluent back-flushes the filter openings and creates a rolling action in the liquid surrounding the filter screen on the upstream side to dislodge particulate debris accumulated on the filter screen.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: November 5, 2002
    Assignee: Mepsco, Inc.
    Inventor: Tommy Sanderson
  • Publication number: 20020158002
    Abstract: In a particularly noise-free and vibration-free operating precoated filter for filtering for example cooling lubricating means, a filter candle 12 surrounding a riser channel 16 is mounted by means of a riser tube 15 in a separating plate 5 in an axially moveable manner. A filter cake adhering to the outside of the filter candle 12 is loosened in such a manner that for example a disk-shaped rotary body 40 comprises a shoulder 42 between the track end 43 and the track start 44 along its track 41.
    Type: Application
    Filed: November 5, 2001
    Publication date: October 31, 2002
    Inventors: Birgit Trotzki, Kandiah Sivagnanam, Rudiger Lennartz, Stefan Schmitz
  • Patent number: 6416665
    Abstract: A filtration apparatus in which a rotating filter element is concentrically mounted in a hollow conical of cylindrical chamber. The filter element consists of a support and a membrane mounted on the support. Fluid enters the chamber through an inlet port and concentrate leaves the chamber through an outlet port. Filtrate drains through the membrane and support to a channel in the centre of the filter element. Filtration relies upon cross-flow of the fluid across the surface of the rotating filter element. This reduces the tendency of solids in the fluid to block pores of the membrane, thereby maintaining high flux and minimising the requirement for cleaning of the filter.
    Type: Grant
    Filed: August 22, 2000
    Date of Patent: July 9, 2002
    Inventor: Kevin Douglas McGrath
  • Patent number: 6406622
    Abstract: According to the apparatus, removables 12 trapped by a first filter film 10 are used as a second filter film 13, and clogging of the first filter film 10 is prevented, and an external force such as bubbles is applied to the second filter film 13 to maintain filtering capacity. And when removables are mixed with the filtered water, the filtered water is recirculated again to the tank in which the wastewater is stored, and after it is checked that a desired inclusion rate has been reached filtration is started again.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: June 18, 2002
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Motoyuki Tsuihiji, Hirofumi Iinuma
  • Publication number: 20020038783
    Abstract: In a particularly noise-free and vibration-free operating precoated filter for filtering for example cooling lubricating means, a filter candle 12 surrounding a riser channel 16 is mounted by means of a riser tube 15 in a separating plate 5 in an axially moveable manner. A filter cake adhering to the outside of the filter candle 12 is loosened in such a manner that for example a disk-shaped rotary body 40 comprises a shoulder 42 between the track end 43 and the track start 44 along its track 41. As soon as a head end piece 20 connected to the riser tube 15 and moveable in an axial manner against the force of a spring 21 is released from the rotating track end 41, the stored force of the spring 21 accelerates the filter candle 12, so that the filter cake adhering to the filter candles is loosened by the acceleration of the filter candle 12 and the impact pulse when a dampening ring arranged between the filter candle 12 and the separating plate 5 abuts the separating plate.
    Type: Application
    Filed: November 2, 2001
    Publication date: April 4, 2002
    Inventors: Birgit Trotzki, Sivagnanam Kandiah, Rudlger Lennartz, Stefan Schmitz
  • Patent number: 6350379
    Abstract: A filter for filtering a fluid, such as lubricating oil for an engine, has a full flow filter element and a bypass filter element stacked on the full flow filter element. A flow-deflecting element is disposed between the full flow filter element and bypass filter element to provide a spinning motion to oil flowing from the bypass element as that oil joins oil which is passed through the full flow filter element. The spinning motion of the oil from the bypass filter element encourages mixing of the oil from the bypass filter element with the oil filtered by the full filter element. During operation of the engine this arrangement tends to provide cleaner lubricating oil and therefore reduces engine wear while increasing the time interval between scheduled maintenance.
    Type: Grant
    Filed: December 29, 1999
    Date of Patent: February 26, 2002
    Assignee: Dana Corporation
    Inventors: Mark Allen Roll, Gregory Keith Rhyne, Willie Luther Stamey, Jr.
  • Publication number: 20020000406
    Abstract: A solid-liquid separating apparatus comprising a cylindrical strainer formed by circular ring members with gaps in between, a casing having the strainer therein, and scrapers disposed in the respective gaps between the circular ring members for removing solid matter adhering to the end (flat) surfaces of the circular ring members. Each of the scrapers comprises a flat auxiliary circular ring member and a flat protruding element. The external diameter of the auxiliary circular ring member is smaller than the external diameter of the circular ring members and is larger than the internal diameter of the circular ring members, and the protruding element extends from the outer circumferential surface of the auxiliary circular ring member. The auxiliary circular ring members are disposed coaxially with the circular ring members, and the tip ends of protruding elements reach the outer circumferences of the circular ring members.
    Type: Application
    Filed: May 25, 2001
    Publication date: January 3, 2002
    Applicant: IZUMI PRODUCTS COMPANY
    Inventor: Shunji Izumi
  • Patent number: 6332545
    Abstract: A solid-liquid separating apparatus comprising: a strainer which is in a cylindrical shape formed by a plurality of flat ring members with gaps in between; a casing which has an accommodating section for setting the strainer therein so that the accommodating section is divided by the strainer into a strainer inner region and a strainer outer region, and an intake port that introduces a mixture of a solid and liquid is formed in the strainer outer region and an outlet port that discharges to the outside the liquid that is separated from the solid and passes between the circular ring members and advances into the strainer inner region is formed in the strainer inner region; and a scraper that has plate-form protruding portions with tip ends thereof located in the gaps between the circular ring members of the strainer so as to scrape off the solid matter adhering to the flat surface of the circular ring members.
    Type: Grant
    Filed: March 9, 2000
    Date of Patent: December 25, 2001
    Assignee: Izumi Products Company
    Inventor: Shunji Izumi
  • Publication number: 20010050249
    Abstract: A solid-liquid separating apparatus including a strainer of a cylindrical shape. The strainer is comprised of circular ring members arranged side by side with gaps in between and disposed inside an accommodating section the device casing. The circular ring members comprise end-part circular ring members at both ends of the strainer and a plurality of intermediate circular ring members disposed between the end-part circular ring members and have inward projections projecting from their inner circumferential surfaces. A plurality of lateral bridge members are installed between the end-part circular ring members, and these bridge members have engaging parts that engage with the respective inward projections of the intermediate circular ring members so as to hold the intermediate circular ring members.
    Type: Application
    Filed: May 15, 2001
    Publication date: December 13, 2001
    Applicant: IZUMI PRODUCTS COMPANY
    Inventor: Shunji Izumi
  • Patent number: 6328884
    Abstract: The invention relates to a device for degerminating and filtering water passing through a sanitary appliance. The device includes a housing through which water can flow, and a filtering device located inside of the housing. The filtering device has a backup cage and a filter cloth bag connected thereto, and essentially surrounds the entire luminous element of a UV lamp. Both the backup cage and the filter cloth bag are made from a plastic material which allows the radiation emitted by the UV lamp to pass through it or which conducts the radiation in the manner of a light conductor.
    Type: Grant
    Filed: May 17, 2000
    Date of Patent: December 11, 2001
    Assignee: Hansa Metallwerke AG
    Inventor: Horst Kunkel
  • Patent number: 6284135
    Abstract: A membrane filter apparatus includes a membrane unit 50 composed of an array of membrane elements 51 disposed within a treatment tank 31. A skirt element 71 is disposed at a bottom portion of the membrane unit and an aerator 61 is disposed under the skirt. A partition is also disposed at the bottom of the membrane unit forming compartments within the skirt element. The gas bubbles discharged from the aerator increase their rising force upon entry into gaps between the membranes. Because of the arrangement of the partition within the skirt element the flow rate of bubbles along the opposite side edge portions of the membrane unit can be increased having the advantage of cleaning the entire surface of each membrane, thereby preventing clogging by sludge, SS, colloid, etc. within the gaps between the membranes. Therefore, filtration can be maintained over a longer period of time and the power required for filtration can be reduced, as well as, the frequency of manual periodic cleaning, chemical cleaning, etc.
    Type: Grant
    Filed: December 8, 1998
    Date of Patent: September 4, 2001
    Assignee: Sumitomo Heavy Industries, Ltd.
    Inventor: Masanobu Ookata
  • Publication number: 20010006157
    Abstract: The invention provides a filtration apparatus for filtering and regenerating a machining fluid. The filtration apparatus includes a dirty tank for receiving the machining fluid and a clean tank fluidly connected to the dirty tank. A filter is provided between the dirty and the clean tanks for filtering the machining fluid which flows from the dirty tank into the clean tank. A conveyer mechanism is provided in the dirty tank for conveying the sediment of particles separated from the machining fluid in the dirty tank. A filter cleaning device are provided for cleaning the filter. The filter cleaning device includes a nozzle bar which is provided in the clean tank for rotation within a plane parallel to the filter means. The nozzle bar directs the machining fluid in the clean tank onto the filter means to blow the particles off the filter means into the dirty tank.
    Type: Application
    Filed: December 28, 2000
    Publication date: July 5, 2001
    Inventor: Susumu Ogasawara
  • Patent number: 6251294
    Abstract: A self-regenerating filter unit having a housing which carries an ultrasonic transducer periodically energizable to dislodge caked solids from a filter element in the housing. The removed solids collect in a storage zone where they are periodically removed.
    Type: Grant
    Filed: December 22, 1997
    Date of Patent: June 26, 2001
    Assignee: Delaware Capital Formation, Inc.
    Inventors: Scott Judson Davis, Dan Michael Hausermann
  • Patent number: 6241878
    Abstract: Described is a self-cleaning filter for a liquid stream confined in a pipe 20. The filter includes a porous ceramic filter body 30 having a power source 35 attached thereto. Upstream from the filter body a helical rib 50 and a sump drain tube 42 are provided. In operation, as the filter becomes clogged, an electrical current is applied causing the ceramic body to exhibit ultrasonic transducer properties which dislodge particulates from its upstream face 31. At the same time, a sump valve 41 is opened to remove the particulate-rich liquid. The helical rib imparts a rotary motion which creates a rotary flow component across the upstream face of the filter.
    Type: Grant
    Filed: March 3, 2000
    Date of Patent: June 5, 2001
    Inventor: Alvin A. Snaper
  • Patent number: 6221255
    Abstract: A system wherein an ultrasound emitter, or gun, is provided which emits an ultrasound beam directed at filter media, on the opposite side of the filter media from where solids accumulate, in order to knock the solids from the filter media. Dislodged solids from the area targeted by the beam are driven upstream, away from the filter media. Gravity then draws the solids to a drain of a collection chamber, which allows for the solids to be safely removed from the system. A guide is provided upstream of the filter media, the guide having angled slats or vanes. These vanes are angled upwardly towards the filter media and downwardly towards the drain, such that as the solids are blasted from the filter media by the gun, they are jolted upstream, and impact the angled vanes upon their downstream return.
    Type: Grant
    Filed: January 22, 1999
    Date of Patent: April 24, 2001
    Inventor: Achyut R. Vadoothker
  • Patent number: 6190557
    Abstract: A spiral wound type membrane element is formed by winding independent or continuous envelope-like membranes around the peripheral surface of a water collection pipe and interposing raw water spacers between the envelope-like membranes. When running, raw water is supplied from at least the periphery side of the spiral wound type membrane element and permeate is taken out from an opening end of the water collection pipe. In back wash reverse filtration, permeate is introduced from the opening end of the water collection pipe and permeate guided out from the peripheral surface of the water collection pipe is discharged from at least the periphery side of the spiral wound type membrane element.
    Type: Grant
    Filed: December 8, 1997
    Date of Patent: February 20, 2001
    Assignee: Nitto Denko Corporation
    Inventors: Hajimu Hisada, Yuji Nishida
  • Patent number: 6183653
    Abstract: An apparatus for removing sludge is applied to a generally cylindrical filter for use in an electric discharge machine. The filter removes sludge in a process solution used in the electric discharge machine by flowing the process solution from an inner periphery surface to an outer periphery surface and/or the outer periphery surface to the inner periphery surface of the filter. A filter support device holds the filter rotatively with the central axis thereof as the central figure and inclining the central axis by a predetermined angle to the horizontal direction. The filter support device also includes cams for providing rotational driving force and successive impactive force to the filter. A motor provides rotational driving force to the cams. Sludge storage may receive the sludge falling from the filter. The filter support device may further alternate the inclined direction of the filter in a predetermined cycle by rotating with an axis perpendicular to the central axis as the central figure.
    Type: Grant
    Filed: May 4, 1999
    Date of Patent: February 6, 2001
    Inventor: Takeshi Yoshida
  • Patent number: 6116430
    Abstract: A filtration apparatus (10) for fluids containing solid matter and/or particles or the like is disclosed. The apparatus (10) comprises screen means (20) and barrier means (21) substantially adjacent and behind the screen means (20). The barrier means (21) has a plurality of corrugated ribs (23) with vent means (22) therein. The corrugated ribs (23) are elongate and parallel and are substantially concave corrugations when seen from the direction from where the fluid is coming while the corrugations are substantially aligned with the direction of the flow of the fluid.
    Type: Grant
    Filed: July 12, 1999
    Date of Patent: September 12, 2000
    Assignee: Aligned Concepts Pty. Ltd.
    Inventor: David Robert Horton
  • Patent number: 6103132
    Abstract: A filter cloth for liquid filtration is made as a long-pile fabric, the pile threads 21 of which lie on the flow side and are flattened against the supporting fabric during the filtration and form a deep filter. At the time of back washing they are straightened by the back washing and release the dirt particles. The back washing is performed preferably by means of a suction bar 13, which at the same time acts mechanically on the pile threads, in order to promote an abrupt straightening of the pile threads at the time of back washing and the flattening of the pile threads after the back washing.
    Type: Grant
    Filed: December 16, 1998
    Date of Patent: August 15, 2000
    Inventors: Carl Franz Seyfried, Ulrich Grabbe
  • Patent number: 6079427
    Abstract: A commercial warewashing system has three sections, a pre-wash section, a power wash section and a final rinse section. The pre-wash section includes a sump. A perforated plate is placed in the pre-wash section over the sump. The plate receives and transfers water and gross garbage to a perforated trough secured to the side of the pre-wash section. Below the trough is a sink which communicates with the sump. The water flows into the sink and then into the sump. The gross garbage is retained in the trough. A spiral drive in the trough moves the gross garbage from the trough to a discharge end where it is removed.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: June 27, 2000
    Assignee: Adamation, Inc.
    Inventor: Hubert A. Perry, Jr.
  • Patent number: 6070739
    Abstract: A filtering device includes a screen including support rods extending in the axial direction of the screen and arranged generally cylindrically with a predetermined interval, and a cylindrical filter member attached fixedly on the outside of the support rods, a vibrator including a shaft provided in the central portion of the screen coaxially with the screen and at least one leaf spring which is fixed in one end portion thereof to the shaft and is capable of abutting in the other end portion against a part of each of the support rods, and a drive unit for rotating at least one of the screen and the vibrator.
    Type: Grant
    Filed: January 23, 1998
    Date of Patent: June 6, 2000
    Inventor: Tadayoshi Nagaoka
  • Patent number: 6036029
    Abstract: A device to drain a fibrous pulp suspension including an arched surface that is impermeable. The arched surface, moreover, is surrounded by a permeable belt. The belt and the arched surface are able to be moved such that there exists a relative velocity between the belt and the arched surface. The arched surface includes recesses that are able to take up quantities of fluid.
    Type: Grant
    Filed: August 29, 1997
    Date of Patent: March 14, 2000
    Assignee: Voith Sulzer Stoffaufbereitung GmbH
    Inventors: Axel Gommel, Josef Schneid
  • Patent number: 6000557
    Abstract: A self-cleaning liquid filter and a method for filtering a liquid are disclosed. In the self-cleaning liquid filter, a rotating hollow drum covered with a filter element is mounted in a filter housing and turned by a waste liquid that contains debris or dirt. Filtered or cleaned liquid enters into the hollow drum and is pumped away at one end of the drum while debris or dirt in the waste liquid are trapped on the filter. A spray nozzle is mounted inside the rotating drum and clean water is sprayed out to wash away the debris and dirt carried by the filter element into a debris collector equipped with a second filter. The debris and dirt are trapped by the second filter while a filtered, or clean liquid is drained back into the filter housing. The novel device is self powered by the waste liquid flow and thus no external power is necessary for operating the device.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: December 14, 1999
    Assignee: Taiwan Semiconductor Manufacturing Company, Ltd.
    Inventors: Yi Lang Ku, Ming Shi Ni, Wei Cheng Lee, Shao Wei Ku
  • Patent number: 5972229
    Abstract: A method for filtering out particles from a fluid is disclosed, wherein unfiltered fluid is guided into a filter housing of a filter apparatus and filtered fluid is guided from the filter housing, and wherein a rotary filter element, which has a filter structure and is arranged in the filter housing and is rotatable about an axis thereof, is rotated at a speed which is sufficiently high that all particles passing in a fluid flow into the area of the rotary filter element are affected by its structure and are ejected therefrom, whereas the fluid passes the structure of the rotary filter element substantially freed from the particles and flows off from the filter housing.
    Type: Grant
    Filed: May 14, 1998
    Date of Patent: October 26, 1999
    Assignee: Nyfotek AS
    Inventor: Eric Gustaf Lundin
  • Patent number: 5951878
    Abstract: A filter cleaning apparatus includes a suction generating assembly having a suction generating nozzle, such as an eductor nozzle. The suction generating nozzle has a nozzle inlet, a nozzle outlet, and a suction port in fluid communication with the filter material. The suction generating assembly also includes a suction member positioned in fluid communication with the suction port and positioned adjacent the influent surface of the filter material. A pump is positioned upstream of the nozzle inlet and in fluid communication, on a suction side, with the filter tank or other liquid source. The pump may be operated to deliver operating fluid from the filter tank so as to pass the operating fluid through the suction generating nozzle in a direction from the nozzle inlet to the nozzle outlet. As a result, liquid in the filter tank is drawn through the filter material in a reverse direction and into the suction member.
    Type: Grant
    Filed: March 20, 1998
    Date of Patent: September 14, 1999
    Assignee: Aqua-Aerobic Systems, Inc.
    Inventor: Gordon Astrom
  • Patent number: 5922208
    Abstract: A method for filtering out of a liquid at least one solid substance includes supplying the liquid containing the substance via axial supply to a filter; filtering the liquid wherein the substance remains in the filter as residue; draining away the liquid; compressing a predetermined amount of residue to the shape of a solid bar under the pressure of the liquid during filtering; opening closeable discharge axially opposite the supply end during filtering; and removing the bar out of the filter under the pressure exerted by the liquid on the bar.
    Type: Grant
    Filed: March 10, 1998
    Date of Patent: July 13, 1999
    Assignee: Defil N.V. Holland Intertrust (Antilles) N.V.
    Inventor: Petrus Adrianus Cornelis Maria Demmers
  • Patent number: 5919376
    Abstract: An improved filtration system comprises a vessel divided into a concentrate chamber and a permeate chamber by a permeable septum. An ultrasonic wave generator is mounted to the vessel and positioned to direct ultrasonic waves through both the permeate contained in the permeate chamber and the permeable septum. A circulator such as a pump or agitator is operably associated with the concentrate chamber to provide a shearing force on the surface of the permeable septum. A vessel inlet port allows concentrate to flow into the concentrate chamber and a permeate outlet port allows permeate to be withdrawn.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: July 6, 1999
    Assignee: CAE Ransohoff Inc.
    Inventor: Lyle Carman
  • Patent number: 5906752
    Abstract: A self-cleaning filter apparatus for use in removing particulate matter from a transport fluid, such as air, which includes a housing having a pair of spaced pulleys over which an endless filter belt is positioned to present two generally straight filter reaches and two generally curved filter reaches. The endless filter belt includes a permeable substrate formed as an endless belt and a plurality of pleats of filter media extending outwardly from the surface of the substrate so that the transport fluid can pass inwardly therethrough and deposit the particulate material on the exterior surface of the pleats. A suction nozzle and/or an air discharge device is positioned adjacent the outer surface of the endless filter at one of the curved reaches thereof for removing particulate matter deposited on the pleats as they pass along such curved reach.
    Type: Grant
    Filed: July 30, 1996
    Date of Patent: May 25, 1999
    Assignee: Pneumafil Corporation
    Inventor: Roger D. Williams
  • Patent number: 5904843
    Abstract: A compact and easily cleanable device for separating solids from a stream of liquid entering the device includes a hollow base having a screen positioned spatially above the bottom of the base and tilted forwardly and downwardly to define a plane which is recessed from an opening in the base which is generally parallel to the screen. A cover is hingedly mounted adjacent the top of the device and includes a motor centrally positioned externally thereon having a drive shaft extending through the cover to the interior side thereof. A pair of wiper blades are rotatably driven on the shaft and are positioned between the interior of the cover and the screen so as to have an edge of the wiper blade rotatably movable on the screen for moving solids collected on the screen around the output shaft and upwardly toward a cutout adjacent the top of the shaft where the solids may exit the device.
    Type: Grant
    Filed: October 30, 1997
    Date of Patent: May 18, 1999
    Inventor: Lori Herbst
  • Patent number: 5902456
    Abstract: Apparatus is disclosed for dewatering pulp suspensions including a pair of cylindrical rotatable liquid-premeable press rolls forming a nip therebetween, so that the material suspension can pass between the nip to be dewatered and to form a material web, a pair of doctor blades disposed below the nip, each associated with one of the press rolls for removing the material web therefrom, and a sealed casing enclosing at least the upper portion of the pair of press rolls, the sealed casing including an inlet for the material suspension, and the pair of doctor blades being coupled together so that they are movable relative to the nip in order to alter the distance between the pair of doctor blades and the nip when the size of the nip is adjusted.
    Type: Grant
    Filed: May 29, 1997
    Date of Patent: May 11, 1999
    Assignee: Sunds Defibrator Industries AB
    Inventors: Ingemar Sundqvist, Bert Haggstrom, Olof Swardh
  • Patent number: 5900147
    Abstract: The invention relates to a filter medium particularly for filtering in a suction drier. According to the invention, the filter medium is manufactured of a material that can be made to oscillate essentially at a standard frequency.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: May 4, 1999
    Assignee: Outokumpu Mintec Oy
    Inventor: Bjarne Ekberg
  • Patent number: 5888407
    Abstract: Materials including suspended particles are brought together and then separated into two streams one of which only contains the particles, the output streams having different composition from inlet streams. Separation is effected in filtration modules which include a moving runner with wall conditioning elements which dislodge accumulated particles from porous walls of filters.
    Type: Grant
    Filed: June 25, 1997
    Date of Patent: March 30, 1999
    Inventor: Robert Arthur Benson
  • Patent number: 5871641
    Abstract: A device for filtering fluid includes a hollow housing (10) having a fluid inlet (26) and a fluid outlet (28). A filter element (50) formed of fluid permeable material is disposed within the housing (10) for filtering fluid entering the fluid inlet (26), the fluid passing through the element (50) and out the fluid outlet (28). The element has a generally cylindrical configuration with the permeable material forming a plurality of elongated, radially extending pleats (98). The pleats are supported by spacers (81) having a plurality of blades (102) attached to a web (106) with channels (104) therebetween. The element (50) is used as a septum for supporting a diatomaceous earth precoat. A regeneration piston (76) creates fluid flows within the filter that cause the element (50) to flutter, thereby displacing the diatomaceous earth precoat from the septum for regeneration.
    Type: Grant
    Filed: November 25, 1997
    Date of Patent: February 16, 1999
    Assignee: H-Tech, Inc.
    Inventor: Donald R. Davidson
  • Patent number: 5849183
    Abstract: A filtration apparatus, used for obtaining cutting oils cleaned by using filtration apparatus so as to reuse the separated cutting oil in machining operations, includes an oil tank for storing filtered cutting oil, a storage tank for temporarily storing the filtration target cutting oil, a rotatably driven filtration drum, rotatably supported in the storage tank and having a side-surface in order to let a filtered oil to flow into the liquid tank, a dynamic seal member provided between the filtration drum and side wall of the storage tank, an injecting means for washing filters and dip-up plates for continuously conveying cutting downward from a charge port to discharge port.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: December 15, 1998
    Assignee: Kabushiki Kaisha SYST
    Inventors: Seizo Ota, Tadao Uchiyama
  • Patent number: 5843304
    Abstract: A materials treatment system which includes filtration and treatment of solid and liquid components of a material, such as a waste material. A filter or substrate assembly is provided which allows liquids to pass therethrough, while retaining solids. The solids are then incinerated utilizing microwave energy, and the liquids can be treated after passing through the filter element, for example, utilizing a treatment liquid such as an oxidant liquid. The filter assembly can also include an exhaust filter assembly which removes solids or particulate matter from exhaust gasses, with the retained solids/particulates incinerated utilizing microwave energy.
    Type: Grant
    Filed: May 22, 1995
    Date of Patent: December 1, 1998
    Assignee: Wastech International, Inc.
    Inventors: Guy Marchesseault, John M. Rummler, Heinz Sauk-Schubert, Thomas Beal
  • Patent number: 5830366
    Abstract: The present invention is related to a method and apparatus for filtering or straining water taken into a marine vessel so as to remove solid contaminants that may impede operation of water consuming devices on the vessel such as electrical generators, air conditioners, refrigeration systems, propulsion engines and the like. Solid contaminants retained by a filter or strainer are collected and then macerated and removed by a macerator pump. The solid contaminants removed and macerated include marine weeds, grasses, solid matter and marine organisms, including, but not limited to jellyfish and fish of such size as may be able to enter the sea water intake served by the invention. The water so treated may be fresh, brackish or salt water.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: November 3, 1998
    Inventor: Charles B. Husick
  • Patent number: 5816212
    Abstract: In an oil supply device for a machine having different categories of oil consumers, to which respectively one supply loop provided with at least one pump is provided, it is possible to achieve a simple structure and advantageous operating costs in that all supply loops can be provided with oil from a common oil tank, that at least one supply loop having a self-cleaning filter provided with an outlet for oil sludge, and that a separating device is provided, which can be charged at least with the oil sludge from each self-cleaning filter and which has a clean oil outlet terminating in the oil tank.
    Type: Grant
    Filed: May 19, 1997
    Date of Patent: October 6, 1998
    Assignee: Man B & W Diesel A/S
    Inventors: Henning Lindquist, Poul Cenker
  • Patent number: RE37831
    Abstract: A soil separator for a dishwasher includes a centrifugal soil collection wall surrounded by a spill over guide channel, surrounded by a shallow annular soil accumulator channel. The soil accumulator channel is open to the dishwasher chamber but covered by a filter screen. The accumulator channel is shallow beneath the screen and empties downwardly into an accumulator sump where accumulated soil is periodically drained. The shallow accumulator channel allows water to flush an inside of the screen to carry soil to the accumulator sump.
    Type: Grant
    Filed: June 22, 2000
    Date of Patent: September 10, 2002
    Assignee: Whirlpool Corporation
    Inventor: Edward L. Thies
  • Patent number: RE36297
    Abstract: A method and apparatus for fibrous suspensions in the wood processing industry and more specifically to a so-called drum cylinder, the basic construction of which comprises a vessel, into which suspension being thickened is supplied and a wire-surface cylinder rotating in the vessel. The drum filter is characterized in that the closure member of the drum filter has a channel for leading gas from the filtrate tubes through the compartments of the distribution chamber to the outside of the closing member. The method is characterized in that the operation phase of the filter cylinder is divided into five separate stages. In the first stage, when the cylinder descends on to the vessel, air and the initial filtrate are discharged from the filtrate components and the formation of the pulp web on the wire surface begins. In the second stage, filtrate is discharged with vacuum and the formation of the pulp web continues.
    Type: Grant
    Filed: June 1, 1994
    Date of Patent: September 14, 1999
    Assignee: A. Ahlstrom Corporation
    Inventors: Jukka Heino, Raimo Kohonen, Erkki Savolainen