Internal Spring Patents (Class 210/352)
  • Patent number: 10022658
    Abstract: A water filter system includes a removable filter unit having a body portion including a proximal end and a distal end. The proximal end is adapted to be inserted into a filter head assembly. A laterally extending key member is disposed on the body portion and adapted to engage a key slot in the filter head assembly. An engagement protrusion extends from the proximal end. The engagement protrusion includes a first portion that has a first radius of curvature and a second portion opposing the first portion that includes a second radius of curvature that is larger than the first radius of curvature.
    Type: Grant
    Filed: September 11, 2014
    Date of Patent: July 17, 2018
    Assignee: Whirlpool Corporation
    Inventors: Christopher A. Kruckenberg, John W. Morrison, Jeffrey A. Spindler
  • Patent number: 10010820
    Abstract: A water filter system includes a removable filter unit having a body portion including a proximal end and a distal end. The proximal end is adapted to be inserted into a filter head assembly. A laterally extending key member is disposed on the body portion and adapted to engage a key slot in the filter head assembly. An engagement protrusion extends from the proximal end. The engagement protrusion includes a first portion that has a first radius of curvature and a second portion opposing the first portion that includes a second radius of curvature that is larger than the first radius of curvature.
    Type: Grant
    Filed: March 23, 2018
    Date of Patent: July 3, 2018
    Assignee: Whirlpool Corporation
    Inventors: Christopher A. Kruckenberg, John W. Morrison, Jeffrey A. Spindler
  • Patent number: 10005010
    Abstract: A filter device with a filter body (1) has a filter bowl (3) and a filter head (5) formed by a removable locking piece of the filter bowl (3). The filter head (5) has a connection point (15) for an unfiltrate flow and a connection point (27) for discharging a filtrate flow. A filter element (7) containing filter material (11) is connected between the connection points (15, 27) and is disposed inside the filter bowl (3) for the filtration of the unfiltrate, specifically for particle contamination. A flow directing device (33) directs the unfiltrate flow to the surface sections of the filter material (11) of the filter element (7) to provide a filtering action when the device is in operation. The flow directing device is a molded component (33) that belongs to the filter head (5) and to which a fluid flow is applied.
    Type: Grant
    Filed: April 12, 2016
    Date of Patent: June 26, 2018
    Assignee: HYDAC FILTERTECHNIK GMBH
    Inventors: Norbert Sann, Christian Schneider
  • Patent number: 9937451
    Abstract: A filter unit includes a body portion having a proximal end and a distal end. An engagement protrusion extends from the proximal end. The engagement protrusion includes a first portion that has a first radius of curvature and a second portion opposing the first portion that has a second radius of curvature that is larger than the first radius of curvature. A protruding retention surface is disposed on and extends radially outward from the body portion. The protruding retention surface is adapted to secure the filter unit in a filter head assembly.
    Type: Grant
    Filed: October 31, 2014
    Date of Patent: April 10, 2018
    Assignee: Whirlpool Corporation
    Inventors: Christopher A. Kruckenberg, Jeffrey A. Spindler, John W. Morrison
  • Patent number: 8893895
    Abstract: The fluidized bed processor of the present invention includes an internal filter assembly with a rack and a cartridge-type filter supported at the lower end by a bracket. The rack includes an elongated rod extending through the filter. An end cap is provided on the lower end of the rod for normal sealing engagement with the filter bracket. During normal operation of the processor, the upper and lower ends of the filter are sealed. During or after cleaning of the filter, the rack is lowered, and a spring separates the filter and support bracket from the end cap so as to create a gap for drainage of cleaning fluid.
    Type: Grant
    Filed: August 7, 2012
    Date of Patent: November 25, 2014
    Assignee: Freund-Vector Corporation
    Inventors: James A. Clark, James G. Spencer, James G. Frizzell
  • Patent number: 8864989
    Abstract: [Object] It is an object of the present invention to provide a filtering apparatus capable of efficiently filtering a large volume of to-be filtered water, in which its filtering material is less prone to be clogged, and even if the filtering material is clogged, it is possible to wash the filtering material. [Solving Means] An upward-type filtering apparatus (1) includes a pressure container (2) and a filtering material (3) made of gravels, filtering sands or particles.
    Type: Grant
    Filed: April 11, 2011
    Date of Patent: October 21, 2014
    Inventor: Kazunori Koishi
  • Publication number: 20140144823
    Abstract: An Archimedes screw plant for separating slurry includes a tubular sifting device; a slurry feeding device; a device for evacuating the liquid fraction; and a device for evacuating the substantially dry separated solid. The device includes an upper compaction chamber of the separated solid where a solid plug of product is formed. In addition, the tubular sifting device has an upper opening being provided with an auxiliary contrast element for forming said solid plug of product.
    Type: Application
    Filed: July 5, 2011
    Publication date: May 29, 2014
    Applicant: WAM INDUSTRIALE S.P.A.
    Inventors: Vainer Marchesini, Massimo Passerini, Marco Gaddi
  • Patent number: 8679334
    Abstract: A power steering fluid filter includes a housing that defines an interior chamber, an inlet port communicating with the upstream end of the interior chamber, and an outlet port communicating with the downstream end of the interior chamber. A movable thimble filter is disposed within the housing and an annular magnet is located at the mouth of the thimble filter. A spring biases the thimble filter and magnet toward the inlet port of the housing. In use, power steering fluid passes through the housing and debris is captured by the thimble filter. Ferrous particles entrained in the fluid flow are attracted to and captured by the magnet. When the thimble filter becomes clogged, it is displaced by the pressure of the fluid against the clogged filter so that fluid can flow around and bypass the thimble filter while still being exposed to the magnet for removing ferrous particles.
    Type: Grant
    Filed: April 14, 2011
    Date of Patent: March 25, 2014
    Assignee: AirSept, Inc.
    Inventors: Aaron Becker, Myron Stein
  • Publication number: 20130233778
    Abstract: Apparatus improvements to the method for improving belt press dewatering which incorporates a high compression zone with multiple pinch points. Apparatus improvements include a) separate lower permeable belts with different materials, weave patterns wrap and weft thread diameters and opening sizes for each pinch point; b) an apparatus for raising the upper frame for ease of replacing belts and automatic recovery from jamming of belt press; and c) independent gap width and compression adjustments at each pinch point.
    Type: Application
    Filed: March 8, 2012
    Publication date: September 12, 2013
    Inventor: William H. Moss
  • Patent number: 8480896
    Abstract: A scavenging filter includes a volume containing activated beads or fiber particles of a scavenging material housed in a removable housing in a cartridge filter body having an axial inlet extending to a space below a permeable false bottom, the fluid permeating upwards through the material, and cleaned liquor leaving via an annular space surrounding the chamber.
    Type: Grant
    Filed: September 14, 2006
    Date of Patent: July 9, 2013
    Assignee: Madison Filter 981 Ltd.
    Inventor: Martin Moss
  • Publication number: 20130081993
    Abstract: Filters are disclosed in the form of a helical or spiral element operable to be contained in a pipe fitting, or device to be protected, such as a valve, sprinkler or the like. Filters including devices for adjusting the pitch of the filter and devices for clearing clogs in the filter are disclosed. Plumbing fixtures including a filter element are disclosed as well as devices for adjusting the pitch of the filter and devices for clearing clogs in the filter.
    Type: Application
    Filed: September 28, 2012
    Publication date: April 4, 2013
    Inventor: Anthony Freakes
  • Publication number: 20120217200
    Abstract: Disclosed herein is a one-way filter drier comprising a cartridge having an inlet and an outlet, a molecular sieve being provided inside the cartridge, a first filter sheet being provided between the molecular sieve and the outlet, a spring and a second filter sheet being provided between the inlet and the molecular sieve in sequence, wherein at least one piece of third filter sheet is provided in the spring. In the one-way filter drier provided by the present application, the third filter sheet is provided in the spring, the refrigerant still has relative large flowing space after entering via the inlet, which may ensure the requirement of the fluid flux; at the same time, the third filter sheet combining with the first filter sheet and the second filter sheet may maximize the filter capacity.
    Type: Application
    Filed: February 27, 2012
    Publication date: August 30, 2012
    Applicant: Zhejiang Sanhua Climate and Appliance Controls Group Co., Ltd
    Inventor: Linping Wu
  • Patent number: 8220640
    Abstract: One embodiment is a replaceable filter cartridge including a plurality of stacked disks of filter media extending between a first endplate and a second endplate. A plurality of frame members extend axially between and connect the first endplate to the second endplate. The cartridge includes a compression assembly supported by the first endplate. The compression assembly includes at least one compression member operable to impart a compression force on said plurality of stacked disks of filter media thereby biasing said plurality of stacked disks of filter media in an axial direction toward the second endplate.
    Type: Grant
    Filed: July 23, 2007
    Date of Patent: July 17, 2012
    Assignee: Cummins Filtration IP, Inc.
    Inventors: Kelly H. Schmitz, Gerard Malgorn
  • Patent number: 8118998
    Abstract: A combination full flow media and bypass media filter cartridge for filtering fluid in an internal combustion engine. The apparatus includes a venturi filter having a full flow media attached to and extending between a first endplate and a second endplate. The second endplate includes an orifice. The apparatus further includes a stack of disks extending between a compression end and a venturi end. The stack of disks has a flow path defined by a plurality of openings wherein each disk includes at least one opening. The flow path extends between the compression end and the venturi end. The venturi end is substantially adjacent the second endplate of the venturi filter. The apparatus further comprises resilient compression member connected to the venturi filter for maintaining a minimum sealing force on the stack of disks.
    Type: Grant
    Filed: June 13, 2007
    Date of Patent: February 21, 2012
    Assignee: Cummins Filtration IP, Inc.
    Inventors: Ismail C. Bagci, Wilson Lee Currier, James O. Stuart, Donna A. Butler, Sairam M. Thota, Karen Ramsey-Idem
  • Publication number: 20110253607
    Abstract: A power steering fluid filter has a housing that defines an interior chamber, an inlet port communicating with the upstream end of the interior chamber, and an outlet port communicating with the downstream end of the interior chamber. The housing is for spicing inline with a power steering fluid hose via its inlet and outlet ports. A thimble filter is disposed within the housing and an annular magnet is located at the mouth of the thimble filter. A spring biases the thimble filter and magnet toward the inlet port of the housing. In use, power steering fluid passes through the housing and debris is captured by the thimble filter. Ferrous particles entrained in the fluid flow are attracted to and captured by the magnet. When the thimble filter becomes clogged, it is displaced by the pressure of the fluid against the clogged filter so that fluid can flow around and bypass the thimble filter while still being exposed to the magnet for removing ferrous particles.
    Type: Application
    Filed: April 14, 2011
    Publication date: October 20, 2011
    Inventors: Aaron Becker, Myron Stein
  • Patent number: 7913855
    Abstract: The invention relates to an improved self-cleaning filter for agricultural irrigation water having a support base (8) for the rings (3) traversed by perforated tubes (4) which clean them, allowing the axial movement of the tubes (4) having an integral upper cover (5) at the opposite end which presses them in an axial direction, whereas the lower base (6), also integral thereto, generates the axial thrust to separate and press them, acting as a blocker and allowing the flow path to the perforated tubes (4); incorporating a base (9) acting as a membrane and a spring pressing on the rings (3), with an adjustable separation and variable in number.
    Type: Grant
    Filed: November 18, 2005
    Date of Patent: March 29, 2011
    Inventor: Salvador Ros Roca
  • Publication number: 20110031181
    Abstract: A filter cartridge that includes a housing having first and second housing members, a filter media pack positioned within the housing, and a housing connection defined between the first and second housing members. The first and second housing members each include a flange. The flanges engage each other at an engagement location. The engagement location extends around a circumference of the first housing member along an internal surface of thereof. A permanent housing connection is defined along the engagement location.
    Type: Application
    Filed: June 29, 2009
    Publication date: February 10, 2011
    Inventors: John R. Hacker, Bradley S. Honermann, Mark S. Emery
  • Publication number: 20100155324
    Abstract: A filter apparatus, including a dual-chambered, centrifugal and compressive filtration apparatus having a central annular filter element, rotating external radial fins extending from adjacent the filter element to adjacent an outer cannister wall and internal fins within the annular filter element. The disclosed filter element is a continuous resilient, cylindrical, helical filter coil including a regular sinusoidal shape defining loop-shaped filter pores between adjacent coils.
    Type: Application
    Filed: March 5, 2010
    Publication date: June 24, 2010
    Inventor: Bayne Carew
  • Patent number: 7635427
    Abstract: An ion exchange filter for a fuel cell system includes a housing with a fluid flow-in port and a cartridge which is disposed inside the housing and in which an ion exchange resin is filled, the fluid flowing in the cartridge through the flow-in port is filtrated therein by the ion exchange resin and the filtrated fluid flows out through the flow-out port. The housing has a casing having an opened upper end and a lid closing the upper end opening, and the fluid flow-in port has an outer peripheral wall of the casing at a portion above a bottom surface of the cartridge disposed inside the housing and the fluid flow-out port is formed to the lid, and a gap is formed between the housing and the cartridge for flowing the fluid flowing inside the housing through the flow-in port towards the bottom portion of the housing.
    Type: Grant
    Filed: November 28, 2006
    Date of Patent: December 22, 2009
    Assignee: Toyo Roki Seizo Kabushiki Kaisha
    Inventors: Koji Suzuki, Keisuke Wakabayashi
  • Patent number: 7601260
    Abstract: An ion exchanger vessel having a housing for receiving an ion exchange material and an inlet line and a discharge line in the housing for feeding and discharging a liquid to be passed through the ion exchange material. To heat the liquid, a heating medium is guided through the ion exchanger vessel, such that the heating medium is separated from the liquid to be passed through the ion exchange material.
    Type: Grant
    Filed: June 14, 2006
    Date of Patent: October 13, 2009
    Assignee: Mann & Hummel GmbH
    Inventors: Dieter Amesoeder, Dieter Schreckenberger
  • Patent number: 7581649
    Abstract: In a liquid filter of the reverse-flow flush-cleaning type, the present invention provides the improvement of mounting the pack of discs (170) intermediate to an assembly including a seat member (200) and screw-thread split-ring (202).
    Type: Grant
    Filed: September 19, 2004
    Date of Patent: September 1, 2009
    Assignee: Arkal Filtration Systems C.S. Ltd.
    Inventor: Raanan Ben-Horin
  • Patent number: 7469504
    Abstract: A pair of counter-wound spring-like members are placed in a gutter above an opening communicating with a downspout. A cord joined to the spring-like members extends through said downspout and out of an opening in the downspout. The cord is pulled and released to contract and expand the spring-like members to grind and/or crush debris collected in the gutter.
    Type: Grant
    Filed: November 9, 2005
    Date of Patent: December 30, 2008
    Inventor: Raymond L. Nocella
  • Patent number: 7285148
    Abstract: A filter assembly for an engine and operable to support a filter element. The filter assembly includes a housing defining a filter receiving space having a first end and a second end. The first end and second end defining an axial length therebetween. A biasing element is integrally formed as one piece with the housing and disposed adjacent the first end.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: October 23, 2007
    Assignee: Briggs & Stratton Corporation
    Inventor: James Daleiden
  • Patent number: 7241383
    Abstract: A fluid treatment method includes the steps of forming a ring lamination by laminating a plurality of filtering rings with contact surfaces facing each other in a laminating direction; providing at least portions of the filtering rings with a contact surface roughness (Ra) in a range of about 0.01 ?m to 20 ?m; pressing the ring lamination under a contact surface pressure (p) within a range from 0 to 177 kg/cm2 in the laminating direction of the filtering rings to cause the contact surfaces to closely adhere to each other; directing an object fluid into gaps formed by contact surfaces of neighboring filtering rings of the ring lamination; and dividing the object fluid into a first separated fraction and a second separated fraction for separation. An apparatus for carrying out the method includes a ring lamination, a housing therefor, a ring press for acting on the ring lamination under a prescribed pressure, an object fluid source, and a pressure source for impressing a prescribed pressure on the object fluid.
    Type: Grant
    Filed: March 3, 2004
    Date of Patent: July 10, 2007
    Assignee: TOA Engineering Co., Ltd.
    Inventor: Yoshinao Katano
  • Patent number: 7192528
    Abstract: A self-cleaning filter system is disclosed that includes an inlet fitting that is adapted to be inserted into an existing filter body. A spray tube having a plurality of outlets that slideably engages the inlet fitting, is positioned in the ring discs of the existing filter and a compression member proximate to one end of the ring discs applies a compressive force to the ring discs. When fluid enters the spray tube from the inlet fitting compression on the ring discs is reduced to allow the ring discs to separate while fluid pressure is simultaneously imposed on the ring discs through a plurality of outlets to clean the filter component. The parts included with the system may be used to convert a manual filter into a self-cleaning filter system.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: March 20, 2007
    Assignee: JNM Technologies, Inc.
    Inventors: James F. Prochaska, Justin J. Prochaska
  • Patent number: 7188731
    Abstract: An apparatus and method for filtering particles from a fluid comprises a fluid inlet, a fluid outlet, a variable size passage between the fluid inlet and the fluid outlet, and means for adjusting the size of the variable size passage for filtering the particles from the fluid. An inlet fluid flow stream is introduced to a fixture with a variable size passage. The size of the variable size passage is set so that the fluid passes through the variable size passage but the particles do not pass through the variable size passage.
    Type: Grant
    Filed: August 25, 2003
    Date of Patent: March 13, 2007
    Assignee: The Regents of the University of California
    Inventors: Steve B. Brown, Billy W. Colston, Jr., Graham Marshall, Duane Wolcott
  • Patent number: 7097763
    Abstract: An ion exchange filter apparatus to reduce ions contained in a liquid medium used in a fuel cell system is equipped with an ion exchange filter 6 to receive an ion exchange resin 38. The ion exchange filter 6 includes a flow passage 27 to introduce the liquid medium to the ion exchange resin 38, a bypass passage 7 to flow the liquid medium by bypassing the ion exchange resin 38, and an orifice 21 disposed at a branch section where the bypass passage 7 is branched from the flow passage 27, to determine a flow volume ratio of the liquid medium flowing in the ion exchange resin 38 and the bypass passage 7, wherein a hole diameter of the orifice is set so that a pressure loss generated when all the amount of the liquid medium flows in the bypass passage 7 becomes substantially equal to an allowance maximum pressure loss of the ion exchange filter 6.
    Type: Grant
    Filed: November 22, 2004
    Date of Patent: August 29, 2006
    Assignees: Nissan Motor Co., Ltd., Toyo Roki Seizo Kabushiki Kaisha
    Inventors: Shinichiro Takemoto, Koji Suzuki
  • Patent number: 6936084
    Abstract: A filter for separating contaminants from a gas stream, including (a) a housing having a housing body and a housing head, the housing head having an inlet for the gas stream to be purified, an outlet and a first sealing surface, and (b) a filter element accommodated in the housing, having an element head and an element body having a central element axis and an element interior. The element head has a second sealing surface which cooperates with the first sealing surface. A curved inlet manifold is formed between the inlet and the element interior. The inlet manifold is embodied partly in the housing head and partly in the element head such that the first and second sealing surfaces contact in a sealing plane at a 90° to 60° angle to the element axis. A radially arranged seal is provided on the sealing plane, forming one of the sealing surfaces.
    Type: Grant
    Filed: June 11, 2001
    Date of Patent: August 30, 2005
    Assignee: Beko Technologies GmbH
    Inventors: Herbert Schlensker, Johannes Sinstedten
  • Patent number: 6893555
    Abstract: A dual flow filter unit for the filtration of a pressurized liquid such as oil, comprising a closed housing (10) having an inlet (31), and main and secondary outlets (32, 13) for that liquid. The unit further comprises a main filter element (21) arranged in the housing (10) and having an unfiltered fluid surface exposed to the majority of the liquid flow, the flow through the main filter (21) being directed to the main outlet (32) from the housing (10); and a secondary filter element (17) exposed to a portion of the liquid flow supplied to the housing inlet (31), any flow through the secondary filter being directed to the secondary outlet (13) from the housing. The main filter element (21) offers a low resistance to the flow of fluid therethrough relative to the secondary filter element (17) so that the majority of the flow through the inlet (31) is filtered by the main filter element (21) and the remainder by the secondary filter element (17).
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: May 17, 2005
    Inventors: Alan Philip Roper, Michael Charles Fallows
  • Patent number: 6770110
    Abstract: The invention relates to a filtering device (1) comprising a tubular filter (6). One end of said filter is supported on a base part (2) and the other end is supported on a cupped filter housing (3). The filter housing overlaps the filter (6) with a radial clearance (7) and is detachably connected via the edge (4) thereof to the base part (2). The base part (2) comprises a first flow-through channel (33) which is connected to the clearance (7) and comprises a second flow-through channel (34) which is connected to a cavity (35) of the filter (6). The aim of the invention is to make it possible to attach or detach the filter housing (3) even when tight spatial relationships are present in the vicinity of the filter housing (3) or in order to hold the filter (6) in position against the filter housing (3).
    Type: Grant
    Filed: February 12, 2002
    Date of Patent: August 3, 2004
    Assignees: Brueninghaus Hydromatik GmbH, K. & H. Eppensteiner GmbH & Co. KG
    Inventors: Bodo-Siegfried Seifert, Rudolf Stetter, Ulrich Eppensteiner, Thomas Schafer
  • Patent number: 6761270
    Abstract: A filter assembly and a method of filtering a fluid using the filter assembly are disclosed. The filter assembly includes wave coils arranged axially to define a filter element. The filter element includes bottom and top ends and an inner cavity. The filter assembly also includes a base plate that engages one, or both, ends to support the wave coils. The fluid flows toward the base plate, and the base plate diverts the fluid inside or outside the inner cavity. The wave coils include crests and troughs engaging one another on adjacent wave coils to define filtration apertures. The diverted fluid is filtered through the filtration apertures such that a filtrate of the fluid passes through the inside or outside of the inner cavity, and a retentate of the fluid is retained on the other of the inside or outside of the inner cavity relative to the filtrate.
    Type: Grant
    Filed: August 16, 2001
    Date of Patent: July 13, 2004
    Inventor: E. Bayne Carew
  • Publication number: 20040011726
    Abstract: The aim of the invention is to create a simple and load-resistant filter part for fluid pipes, especially for use with filling nipples, comprising a base body (3) and at least one fluid passage opening (2) which is covered by a filter element (4). According to the invention, the filter element (4) consists of a tightly wound spring wire (5) whose winding end (5c) is preferably supported on a collar ring (3b) on the foot (1b) of the filter.
    Type: Application
    Filed: June 30, 2003
    Publication date: January 22, 2004
    Inventors: Erwin Weh, Wolfgang Weh
  • Patent number: 6536600
    Abstract: The invention relates to a filter device for microfiltration of oil, in particular for use in engines, automatic transmissions and hydraulic applications. The filter device comprises a tubular microfilter cartridge through which medium can flow in the transverse direction and which has open ends. This filter cartridge is accommodated in a filter chamber which is enclosed by a filter housing and is accommodated between two end closure elements, between which the filter cartridge is clamped under prestress. On their surface facing towards the filter cartridge the end closure elements are provided with at least one rib which extends in the transverse circumferential direction of the filter cartridge. The holding means comprise a spring which acts with prestress on one of the end closure elements, in such a manner that his closure element follows the end wall which it adjoins in the event of longitudinal expansion and also in the event of longitudinal contraction.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: March 25, 2003
    Assignee: NTZ International Holding BV
    Inventor: Pierre Gerard Willem Nieuwland
  • Patent number: 6419826
    Abstract: Improved self-cleaning filter, comprised of a casing (1) with an entry (2) for water towards an encircling chamber (5), a filtering element based on a plurality of grooved disks (10), an axial passage (14) in the breast of these disks and an axial exit (9) for clean water. The filtering element (10) is completed in its lower end by a flap (11) that closes the axial passage (14) in the backward movement of water during cleaning, forcing it to go through side collectors (15) unaffected by the flap (11) and in which established are windows (16) for the exit of water, obliquely oriented in a side direction to make the disks (10) rotate during cleaning, also oblique in a vertical direction to take advantage of the separation between the disks (10) and distributed helically (15), the support tower (6) of these disks completed in a retractile rammer (21).
    Type: Grant
    Filed: April 18, 2001
    Date of Patent: July 16, 2002
    Assignee: Wind, S.L.
    Inventors: Manuel Garcia Lara, Juan Mesado Terrones, Diego García de Dionisio Contreras
  • Patent number: 6413290
    Abstract: A filtering device for treating substances passing therethrough includes a filter cartridge having a cylindrical inner wall surrounded by a cylindrical outer wall. The inner and outer walls are spaced to define an annular space between them. A filtering media occupies the annular space and operates to remove contamination from a fluid flowing through the filter cartridge. First and second covers are located at opposite axial ends of the filter cartridge for sealing the system. At least one biasing assembly is disposed at one axial end of the filter cartridge for applying an approximately constant compression force to the filter medium. The compression force minimizes the formation of voids and the occurrence of bridging within the filtering media. A sensing mechanism, such as a Hall Effect sensor, can be applied to the filter cartridge for detecting changes in the filtering media which indicate the formation of voids or defects in the filtering media.
    Type: Grant
    Filed: December 1, 2000
    Date of Patent: July 2, 2002
    Inventor: Thomas J. Gruber
  • Patent number: 6398037
    Abstract: A liquid filtering device having a pack of cylindrical filter member discs (70) with an arrangement for reversed, filter flushing flow cycles. An integrally formed filter core (24) is provided comprising tubular nozzled conduits (30a, 30b, 30c) so that water under pressure within the conduits becomes discharged in jet forms to enable free rotation of the filter discs. One-way valve (90) in the form of a funnel shaped rubber sleeve allows the flow of filtered water to the outlet port (20) but impedes the flow of flushing water from the outlet port through the filter member (70) in the direction of the inlet port (16).
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: June 4, 2002
    Assignee: “AR-KAL” Plastics Products
    Inventors: Yiftach Sadan, Raanan Ben-Horin
  • Patent number: 6224764
    Abstract: An apparatus for purifying and disinfecting water including a tubular housing having a rear inlet end and a front outlet end, a disinfection stage and an absorption stage containing activated charcoal being provided in the housing between the rear inlet end and the front outlet end. Each of the disinfection stage and the absorption stage have a front end and a rear end at which a respective perforated cylindrical insert is arranged, the cylindrical inserts having an outside diameter which corresponds substantially to the inside diameter of the housing. The inserts at the front and the rear end of the disinfection stage and the insert at the front end of the absorption stage are arranged to be stationary and the insert at the rear end of the absorption stage is arranged to be axially displaceable.
    Type: Grant
    Filed: May 12, 1999
    Date of Patent: May 1, 2001
    Assignee: R-Amtech International, Inc.
    Inventors: Gennady Alexeevich Matyushin, Zoya Kirillovna Kim
  • Patent number: 6135293
    Abstract: A water/sludge filter press used with a filter bag for filtering water and collecting sludge in the bag. When the filter press is actuated, the filter bag is compressed therein for dewatering the sludge in the bag for ease in removing the sludge and reusing the bag or replacing the bag. The filter press includes a horizontal stand with an upright vertical press frame. A hydraulic cylinder with piston is mounted on the vertical press frame. Attached to the vertical press frame is an open-top housing adapted for receiving the filter bag therein. The sides and bottom of the housing are lined with screens for passing filtered water therethrough. The housing includes a first vertical side, a second vertical side, a stationary vertical press plate, a vertical movable press plate and a foldable bottom. The foldable bottom includes a pair of pivot arms attached to the piston of the hydraulic cylinder. The foldable bottom is also attached to a lower end of a pair of coil springs.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: October 24, 2000
    Inventors: Lori B. Herbst, Robert Herbst
  • Patent number: 5882531
    Abstract: A water filtration technique is designed to maximize the efficient performance of a variety of granular filtration media. The technique maintains the granular filtration media in a compacted state between a perforated outer media container and a perforated inner media container, where the perforated inner media container is a smaller similitude of the perforated outer media container. In the preferred embodiment of the filtration device of the present invention, the perforated outer and inner media containers are substantially spherical. By maintaining the granular filtration media in a static-state throughout filtration, highly efficient filtration is achieved. In contrast, during the backwash function, the normal inward flow is reversed to outward radial flow and granular filtration media is agitated, fluidized and quickly and vigorously cleaned. A plurality of high-velocity centrally-located water jets create the outward radial flow during backwashing.
    Type: Grant
    Filed: November 13, 1996
    Date of Patent: March 16, 1999
    Assignee: Performance Pool Products, Ltd.
    Inventor: Joseph D. Cohen
  • Patent number: 5785870
    Abstract: A filter unit (10) designed to filter process streams having different components and/or different fluid flow rates. The filter unit includes an elongated filter housing (12) having an inlet port (14) at one end and an outlet port (19) at the other end. A filter element flange (32) is fitted in the housing. The filter element flange is provided with a number of bores (34) that are provided with threading. Filter elements (28) with threaded coupling heads (36) are removably secured to the filter element array by fastening the coupling head in the threaded bores. This arrangement allows the replacement of the filter elements without having to completely disassemble the filter unit. In the event the number of filter elements is less than the number of openings that are in the element flange, plugs (84) are secured into the links in which the filter elements are not seated to prevent unfiltered fluid flow from the inlet port to the outlet port.
    Type: Grant
    Filed: November 8, 1996
    Date of Patent: July 28, 1998
    Assignee: Delaware Capital Formation, Inc.
    Inventors: Scott J. Davis, Kenneth T. Bennick, Michael E. Isch
  • Patent number: 5770070
    Abstract: This invention relates to the use of a unique apparatus and method for extracting radioactive components from liquids, such as electrophoresis buffers. In the present invention, the radioactive liquid is pumped or transported by other suitable means and is passed through a cartridge having an elongated chamber that contains an exchange medium. The exchange medium, i.e. exchange resin, is contained within the elongated chamber between an upper frit and a lower frit. Further, the cartridge has a means within the elongated chamber for retaining pressure between the upper frit and the lower frit. The nucleotides, being charged molecules, bind to the exchange medium and are removed from the liquid. The liquid then exits the cartridge and has such a low amount of radioactivity that it can be disposed of to a conventional drain.
    Type: Grant
    Filed: October 3, 1994
    Date of Patent: June 23, 1998
    Assignee: Genomyx Corporation
    Inventors: Thomas E. Davis, Henry L. Schwartz
  • Patent number: 5665231
    Abstract: A filter of the type having first annular filter media comprising a generally columnar stack of annular filter media lamina for providing filtration for one circuit, a harness for retaining the filter media lamina in stacked columnar alignment comprising a generally circular end piece having a diameter somewhat greater than the diameter of the filter media lamina engaging one end lamina, an annular portion engaging the opposite end lamina, a plurality of elongated strips integral with and extending from the periphery of the annular portion with the end piece receiving and retaining the free ends of the elongated strips. There is a second filter media providing filtration for another circuit. The two filter media are housed adjacent to one another in a hollow cylindrical shell closed at one end. An annular retainer is integral with the shell near the other shell end for engaging the second media and retaining both media axially within the shell.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: September 9, 1997
    Assignee: AlliedSignal Inc.
    Inventors: Brian James Langsdorf, Ralph Allen Knopp, Gerard Walter Bilski
  • Patent number: 5593577
    Abstract: A filter includes a case, filtering material housed within the case, a cover which covers the open end of the case and is non-rotatable relative to the case, and an annular fastener clamping the cover to the case. The case includes a large-diameter portion at an open end of the case, the large-diameter portion including a convexity forming an engagement tab. The cover has a concavity into which the convexity is received to prevent the cover from rotating relative to the case. Moreover, the cover includes a screw thread on the outer periphery thereof. The annular fastener has a screw thread on the inner periphery thereof mated with the screw thread on the outer periphery of the cover. On the other hand, the annular fastener has a small-diameter portion engaged with the large-diameter portion of the case by which engagement and mating of the screw threads the annular fastener secures the cover to the case.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: January 14, 1997
    Assignees: Toyo Roki Seizo Kabushikikaisha, Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Koji Imai, Toshiya Wakahoi, Hiromitsu Adachi, Keiichi Terada, Hiroaki Yamashita, Hiroshi Morikawa
  • Patent number: 5584987
    Abstract: An oil filter assembly for an internal combustion engine includes a body (31) which provides inflow and delivery passages and an attachable filter element container (45) which is attached to the body by a screw-thread at its open end to enclose a cylindrical pleated paper filter element (41) which is located by a perforated support tube (35) carried by the main body, the filter element (35) is sealed at one end against the body and is axially positioned by a spring (38) acting between the closed end of the container and a disc-like closure member (42) which thereby maintains engagement between one end of the filter element and the main body and sealing closure of the other end of the filter by the closure member sealing, the radial and axial compression of the filter element being limited by the support tube.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: December 17, 1996
    Assignee: AlliedSignal, Inc.
    Inventor: Robert S. Mules
  • Patent number: 5520807
    Abstract: A stacked membrane disk module has a number of membrane disks interleaved with seal rings and includes a biasing subassembly for maintaining a compressive force between the membrane disks and interleaved seal rings so that the module can be repeatedly pressurized/depressurized. The membrane disks preferably include a central first aperture and a pair of second apertures which are radially spaced from the central first aperture. These apertures will thus be respectively registered when a number of such membrane disks are stacked between a pair of end plates so as to establish a central fluid passageway and a pair of second fluid passageways. A rigid perforated tube is positioned within the central fluid aperture and is connected to the end plates so that at least one of the end plates is capable of being axially displaced relative to the perforated tube. A biasing member (e.g.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: May 28, 1996
    Assignee: UOP
    Inventors: Roman Myrna, A. William Schwartz, C. Glen Wensley
  • Patent number: 5507498
    Abstract: A sealing device for sealing a slide plate translatable across an extrusion bore in a polymer filtration apparatus includes an annular seal having a sealing surface which is biased against the slide plate by an annular spring. The seal has a thrust surface which is angled relative to the sealing surface and is located at an opposite axial end of the seal from the sealing surface. The annular spring exerts radial forces against the thrust surface of the seal to bias the seal in an axial direction against the slide plate. Pressurized polymer in the extrusion bore further biases the seal against the slide plate.
    Type: Grant
    Filed: October 13, 1993
    Date of Patent: April 16, 1996
    Assignee: Synergy Extrusion Technologies, Inc.
    Inventor: Delano B. Trott
  • Patent number: 5500122
    Abstract: A module for separating at least one component from a flowing mixture containing the same, includes a pair of end plates between which a plurality of stacked separation disks are positioned. The separation disks separate at least one component from the flowing mixture and defines a central passageway therethrough. A tensionable conduit is disposed in the fluid passageway to define a pathway for the separated component through at least one of said end plates and cause the end plates to exert a compressive force to the stacked separation disks in response to the conduit being tensioned. In preferred embodiments, the tensionable conduit includes a single or double helix spring which is machined along a major axial extent of its length. An adjustment nut may thus be threadably coupled to at least one (nonmachined) end portion of the conduit so as to adjustably tension the conduit and translate such tension into compressive force exerted to the stack of membranes by the end plates.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: March 19, 1996
    Assignee: UOP
    Inventor: A. William Schwartz
  • Patent number: 5449468
    Abstract: In a chamber filter press (11), two respective filter cloths (13), which enclose a filter plate (12) located therebetween, are fastened on said plate by means of a connecting part (18) and on the underside (19) thereof by means of lashings (14). The filter cloths (13) are free laterally with respect to the filter plates (12) and, when the chamber filter press (11) is open, they can be stretched apart from one another. The upper ends of the filter cloths (13) are provided with eyelets (20). In this arrangement, two adjacent filter cloths (13', 13") are fastened together on a series (21') of springs (21) which, for their part, are suspended on a mobile crossmember (22). The latter is supported on the chamber filter press such that it can be displaced parallel to the charging channel (17) and can move vertically. It is preferably supported on sliding guides or rails (23) which, for their part, may be supported on the chamber filter press (11) such that they can move in the vertical direction.
    Type: Grant
    Filed: August 25, 1993
    Date of Patent: September 12, 1995
    Assignee: Gerhard Trummel
    Inventor: Fritz Trummel
  • Patent number: 5364540
    Abstract: An apparatus and method for filtering a fluid stream wherein the fluid stream is passed through a first filtering zone to remove particulate materials therefrom above a first preselected micron level, then through a desiccant media bed zone including a multiplicity of desiccant beads to dry the fluid stream and then through a second filtering zone to remove particulate materials therefrom above a second preselected micron level below said first micron level so as to remove smaller particulate materials including particulates from said first filtering zone.
    Type: Grant
    Filed: February 11, 1993
    Date of Patent: November 15, 1994
    Assignee: Emerson Electric Co.
    Inventor: George J. Sciuto
  • Patent number: 5318704
    Abstract: An apparatus for removing contaminants from a liquid comprises a casing and a tubular filter dividing the casing into two compartments. The tubular filter is formed of fibers attached at each end to end supports which are movable axially relative to one another and rotable relative to one another about the longitudinal axis of the filter. A helical spring is disposed within the tubular filter and is so dimensioned that it does not close when the end supports are in their closest operational position. The spring resists inward movement of the fibers when the end supports are moved axially towards each other and rotated to twist the fiber, thereby preventing the compartment defined by the interior of the tubular filter from tending to close.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: June 7, 1994
    Assignee: Kalsep Limited
    Inventor: Ronald C. Cosgrove