Head And Base Connected Patents (Class 210/442)
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Publication number: 20030019809Abstract: A filter assembly with a replaceable filter element and a reusable filter housing, which incorporates a locking mechanism to ensure that the filter system will not be operated without a filter element installed.Type: ApplicationFiled: July 31, 2002Publication date: January 30, 2003Inventors: Aaron K. Amstutz, David C. Becktel, Jeffrey R. Ries, Kevin K. Socha
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Patent number: 6481580Abstract: A fuel filter assembly with a replaceable filter element and a reusable filter housing, which incorporates a locking mechanism to ensure that the filter system will not be operated without a filter element installed.Type: GrantFiled: August 23, 2000Date of Patent: November 19, 2002Assignee: Caterpillar IncInventors: Aaron K. Amstutz, David C. Becktel, Jeffrey R. Ries, Kevin K. Socha
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Patent number: 6471071Abstract: An improved sealing grommet for a spin-on type fluid filter has an annular flange coupled to an interior wall of the grommet body which sealingly engages filter adapter standpipes of varying diameters. An annular cavity, formed by the interior wall of the grommet body and the annular flange, allows pressurized fluid within the annular cavity to exert forces against the surface of the cavity to thereby enhance the sealing engagement between the filter element, the base plate and the filter adapter standpipe.Type: GrantFiled: May 9, 2000Date of Patent: October 29, 2002Assignee: Honeywell International, Inc.Inventors: Megan E. Shoaf, Richard J. Berkey
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Patent number: 6221246Abstract: A filter housing assembly has a tubular standpipe to support successive filter elements within a filter housing closed by a closure plate. A spindle is fixed to the inner surface of the closure plate in position to move into the upper end of the standpipe when the closure plate is in position to close the housing. A top filter support is fixed to the spindle in position to be seated on top of a filter in the housing when the closure plate is in position to close the housing. A skirt extends downwardly from the closure plate to deflect leaks.Type: GrantFiled: September 5, 2000Date of Patent: April 24, 2001Inventor: Zakir H. Shums
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Patent number: 6016923Abstract: The invention relates to a filter cartridge for a filter for filtering liquid or gaseous media comprising two disks and a substantially hollow cylindrical filter member arranged inbetween the two disks, with the medium to be filtered flowing through the filter member, with at least one of the two disks provided with a central aperture whereby the filter cartridge is axially mountable onto a medium inlet pipe or outlet pipe with at least one seal sealingly positioned inbetween, and wherein the filter cartridge is detachable from the pipe for replacement. The filter cartridge is designed as a replacement filter cartridge for replacing common filter cartridges having metal parts, wherein the filter consists of paper and/or cotton and/or felt and/or thermally usable plastic non-woven fabric, wherein the front disks are formed of thermally consumable plastic and the seal is formed of a flexible thermally consumable material.Type: GrantFiled: November 1, 1996Date of Patent: January 25, 2000Assignee: Ing. Walter Hengst GmbH & Co. KGInventor: Dieter Baumann
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Patent number: 6004458Abstract: A filter/sanitizer has a filter housing, provided with a fluid inlet and a fluid outlet, a filter cartridge with a hollow interior, located within the filter housing, and a sanitizer cartridge, with a hollow core, positioned within the hollow interior of the filter cartridge. In a preferred embodiment, the sanitizer cartridge is constructed with an outer fluid-permeable member and an inner fluid-permeable member, the outer and inner members substantially enveloping a space therebetween, with the space containing a sanitizing media bed. In operation, as fluid enters the filter housing through the fluid inlet, substantially the full flow of fluid passes through the filter cartridge, through the sanitizer cartridge and around the sanitizing media contained within the bed, into the hollow core of the sanitizer cartridge, and out of the filter housing through the fluid outlet.Type: GrantFiled: January 28, 1998Date of Patent: December 21, 1999Assignee: H-Tech, Inc.Inventor: Donald R. Davidson
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Patent number: 5868932Abstract: A filter and filtering cartridge with a removable center tube, for the filtering of fluids. The invention relates to a filter for circulating fluid of the type consisting of a filtering cartridge inserted in an outer shell, with the outer shell being intended to be removably connected to a base. The outer shell cooperates with an independent and removable center tube. A filtering cartridge is mounted in the outer shell around the independent and removable center tube which extends longitudinally inside said outer shell over at least a substantial part of the length of the outer shell. The filtering cartridge is longitudinally restrained inside said outer shell in part by the removable center tube.Type: GrantFiled: August 7, 1997Date of Patent: February 9, 1999Assignee: Fleetguard, Inc.Inventors: Jean-Luc Guichaoua, Denis Douchet
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Patent number: 5846416Abstract: A reusable fluid filter assembly comprises a cylindrical housing, a top plate assembly, a top plate attachment member, and a replaceable coreless filter element. The housing has means for removably connecting the housing to the top plate, and a hollow central core having an open first end and being connected to the closed end of the housing at the second end. The central core has a plurality of fluid outlet perforations. The top plate has a rim, fluid inlet means and fluid outlet means extending through the top plate. The top plate attachment member has a tubular shape, and a fluid outlet port extending through it. The coreless filter element having annular end caps on first and second open ends is disposed in the housing. The fluid inlet means of the top plate are in fluid communication with a fluid inlet chamber defined by the filter element and housing. The central core extends into the first open end of the filter and the hollow cylindrical chamber of the filter element.Type: GrantFiled: May 24, 1996Date of Patent: December 8, 1998Assignee: Caterpillar Inc.Inventor: David F. Gullett
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Patent number: 5833847Abstract: Apparatus for filtering industrial liquids and gases by separation of suspension particles based on the principle of radial stationary filtering. The filtering apparatus comprises a cover (9), a body (6) and a base (19) whose volume is adjustable by altering the length of its body (6). A threaded rod is provided for sealing the unit and also for providing a sealed joint between a filter element (4), the cover (9) and the base (19). The threaded rod (2) can be tightened and untightened using a butterfly handle (11) without the use of other threaded connections. Depending on the liquid or the gas to be filtered, the filter medium will be made from towel-type paper or felt. The filter elements (4) come in a single size and a spacer device (22) is used to provide different lengths. The liquid or gas to be filtered is conveyed by a conical transmission conduit (16) past a circular rib (13) into the outer peripheral zone of the filter chamber (5).Type: GrantFiled: July 17, 1995Date of Patent: November 10, 1998Inventor: Luc Adriaenssen
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Patent number: 5824211Abstract: An improved oil reclamation device for removing solid contaminates and water or other volatile contaminates from the engine lubricating oils and hydraulic fluids. More particularly, this oil reclamation device relates to a unique combination evaporation chamber and filter housing, and to an improved filter assembly. A first feature of this oil reclamation device is the improved utilization of space through the efficient combining of the filter and evaporation chambers within one compact housing, which utilization brings the benefits of a compact installation with a minimum difficulty of installation. Another benefit of this design is the efficient use of engine oil to heat the evaporation surface evenly and effectively without the need of any additional heat source. This design eliminates cold spots on the evaporation surface and the need for potentially dangerous heating elements. Further, many different types of filter elements and filtration ratings may be used.Type: GrantFiled: May 3, 1995Date of Patent: October 20, 1998Assignee: Charles A. LowryInventor: Charles A. Lowry
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Patent number: 5814215Abstract: A lubricating oil filter for internal combustion engines is disclosed herein. The oil filter includes a vertical housing closed at the top by a screw cover and includes a filter support rotatably mounted on the screw cover for removably supporting an annular filter element. The filter support includes a valve element at a bottom end thereof for closing an additional outlet port at the bottom of the housing when the cover and filter support are installed on the housing and for opening the additional outlet port when the cover and filter support are removed from the housing.Type: GrantFiled: February 11, 1997Date of Patent: September 29, 1998Assignee: Knecht Filterwerke GmbHInventors: Elke Bruss, Hans Jensen, Rolf Mohle
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Patent number: 5795472Abstract: A filter device for separating solid material from a liquid includes a filter housing with vertically extending removable sidewalls wherein at the location of the removable sidewalls connections are provided to receive two vertically extending sidewalls in spaced parallel relationship whereby a fluid impermeable sidewall may be inserted into the circumferential section of the housing when the liquid permeable section is removed for cleaning without interfering with the continual operation of the filter device. Moreover, the filter device of the present invention may be a first filter or pre-filter in a multi-stage filter system wherein a second filtering device is received within the first filter, the second filtering device includes a plurality of first tubular filters having an open bottom end and a closed top end and a second tubular filter centrally disposed of the first tubular filters in flow communication therewith.Type: GrantFiled: November 20, 1996Date of Patent: August 18, 1998Inventor: Harry L. Nurse, Jr.
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Patent number: 5776342Abstract: A capsule type filter assembly provides increased strength by fixing ends caps of a filter element to a housing at both ends. At one end, a tubular part extends through a hole in the housing and is joined to the housing. An inner space of the tubular part communicates with the inner space of the filter element. In this configuration, the structural strength of the filter housing is enhanced by making the integrated body of the end caps and the filter element function as the reinforcing means for the housing.Type: GrantFiled: March 5, 1996Date of Patent: July 7, 1998Assignee: Pall CorporationInventors: Hajime Hiranaga, Hidenori Nakayama
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Patent number: 5766449Abstract: A fuel filter assembly that provides a constant level of least restricted fuel flow through the fuel filter assembly during the useful life of the filter media by utilizing the least possible amount of filter media to provide the least possible pressure differential over the filter media while also providing a constant level of fuel additive by exposing an amount proportional to the filter media required for the least possible restricted fuel flow. The fuel filter assembly utilizes a vertically upward housing that houses a filter media and a fuel additive. The fuel level slowly rises in the housing as the filter media becomes obstructed with contaminants and as the fuel additive dissolves over the life of the filter media. The top portion of the housing is made of a transparent material so that the level of fuel level may be easily determined, thereby allowing for an accurate and simple assessment of the useful life of the filter media and the fuel additive.Type: GrantFiled: November 30, 1995Date of Patent: June 16, 1998Assignee: Davco Manufacturing L.L.C.Inventor: Leland L. Davis
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Patent number: 5762788Abstract: A reusable fluid filter assembly includes a cylindrical housing, a top plate assembly, a top plate attachment member, and a replaceable coreless filter element. The housing has means for sealingly engaging the housing to the top plate, and a hollow central core having an open first end and being connected to the closed end of the housing at the second end. The central core has a plurality of fluid outlet perforations. The top plate has a rim, fluid inlet means and fluid outlet means extending through the top plate. The top plate attachment member has a tubular shape, and a fluid outlet port extending through it. The coreless filter element having annular end caps on first and second open ends is disposed in the housing. The fluid inlet means of the top plate are in fluid communication with a fluid inlet chamber defined by the filter element and housing. The central core extends into the first open end of the filter and the hollow cylindrical chamber of the filter element.Type: GrantFiled: August 12, 1996Date of Patent: June 9, 1998Assignee: Caterpillar Inc.Inventor: David F. Gullett
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Patent number: 5698097Abstract: An oil filter for internal combustion engines is disclosed herein. The filter includes a housing with a bottom arranged below an open top and a screw-on cover threadedly engaged within the open top. The housing includes an inlet duct, a first oil discharge duct in the bottom of the housing, and a second oil discharge duct in the bottom of the housing and coaxially surrounding the first oil discharge duct. A support part is provided within the housing having a first end which is connected to the cover in an axially force-transmitting manner and a second free end inserted into the first oil discharge duct when the cover fully threadedly engaged to the open end of said housing to sealingly close the first discharge duct, and is withdrawn from the discharge duct when the cover is removed from the open end of the housing to enable discharging of oil from the housing via the first oil discharge duct.Type: GrantFiled: September 13, 1995Date of Patent: December 16, 1997Assignee: Knecht Filterwerke GmbHInventors: Hans Gebert, Rolf Mohle, Dietmar Sonntag, Elke Bruss, Dietwart Guntert, Hubert Muller
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Patent number: 5695637Abstract: A combined full flow and bypass oil filter for internal combustion engines includes a generally cylindrical filter body and a generally cylindrical filter head which is threadedly attached to the filter body. The filter head includes an inlet and an outlet and the flow path between the inlet and outlet extends through the filter body. Disposed within the filter body is a generally cylindrical and hollow full flow filtering element and a generally cylindrical and hollow bypass filtering element. The incoming flow of lubricating oil passes through the outer diameter surfaces of the full flow and bypass filtering elements and exits from these filtering elements through their hollow interiors. Concentrically positioned in the exiting flow path of the full flow filter is a Venturi nozzle which creates a low pressure zone.Type: GrantFiled: August 27, 1996Date of Patent: December 9, 1997Assignee: Fleetguard, Inc.Inventors: Zemin Jiang, Ted S. Loftis, Dwight S. Suiter, Erika B. Motlow, Mike B. Lanius, Sargeon Billy Hedgecough
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Patent number: 5580453Abstract: A waste water filtering apparatus includes a vertically extending filter housing having a plurality of filter tubes disposed therein. At least one of the filter tubes has an opening in the bottom end thereof and is closed at the top wherein waste water to be filtered flows in through the interior of the filter tube and out through openings in the walls of the filter tube into the interior of the filter housing. A second filter tube is provided with a closed bottom end and an open outlet end in flow communication with a discharge outlet from the filter housing. The second filter tube is in spaced parallel relation with the first filter tube whereby water flowing in the interior of the housing flows into the second filter tube and flows upwardly and out of openings in the top end of the filter tube which is in flow communication with the outlet discharge of the filter.Type: GrantFiled: August 11, 1995Date of Patent: December 3, 1996Inventor: Harry L. Nurse, Jr.
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Patent number: 5507942Abstract: A fuel filter assembly that provides a constant level of least restricted fuel flow through the fuel filter assembly during the useful life of the filter media by utilizing the least possible amount of filter media to provide the least possible pressure differential over the filter media while also providing a constant level of fuel additive by exposing an amount proportional to the filter media required for the least possible restricted fuel flow. The fuel filter assembly utilizes a vertically upward housing that houses a filter media and a fuel additive. The fuel level slowly rises in the housing as the filter media becomes obstructed with contaminants and as the fuel additive dissolves over the life of the filter media. The top portion of the housing is made of a transparent material so that the level of fuel level may be easily determined, thereby allowing for an accurate and simple assessment of the useful life of the filter media and the fuel additive.Type: GrantFiled: February 22, 1994Date of Patent: April 16, 1996Assignee: Davco Manufacturing L.L.C.Inventor: Leland L. Davis
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Patent number: 5484523Abstract: Filtration apparatus for the purification of various oil products such as combustion oil, lubricating oil, hydraulic oil, or transformer oil is disclosed, including a housing, a rigid, hollow core mounted longitudinally within the housing, and filter paper wound around the hollow core so that the oil flows axially through the filter paper in the housing from a high pressure end to the lower pressure end, and in which passages extend between the interior of the hollow core and the filter paper and a valve is provided for establishing fluid communication between the interior of the hollow core and the low pressure end of the filter.Type: GrantFiled: October 14, 1993Date of Patent: January 16, 1996Inventor: Aegir Bjornsson
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Patent number: 5389246Abstract: A suction and return line reservoir filter that can be used under high negative pressure suction applications is provided with a positive engaging means adapted to hold the bowl against the filter housing even during such high negative differential pressure suction operations. An access cover is provided which includes three equally spaced axial extensions or fingers to force the bowl against the filter housing.Type: GrantFiled: February 3, 1994Date of Patent: February 14, 1995Assignee: Zinga Industries Inc.Inventor: William L. Zinga
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Patent number: 5290443Abstract: A faucet-mounted filter in which a housing is positioned in flow transmitting relation with the water flow line. A microporous, filter is positioned to sealingly occlude water flow through the housing so that all water flow through the housing must pas through porous walls of the filter. The pores of the filter walls are no larger than 0.22 micron, as measured by the particles that the pores pass. Thus the filter is capable of microbial filtering.Type: GrantFiled: October 24, 1991Date of Patent: March 1, 1994Assignee: Culligan International Co.Inventor: William W. Norton
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Patent number: 5182017Abstract: Filtrate separating device having a pair of walls connected by a frame defining a receiving space for sludge to be filtered. The walls being displaceable away from one another, and made of a flexibly deformable liquid and gas impermeable material.Type: GrantFiled: July 17, 1991Date of Patent: January 26, 1993Inventor: Ralph Ippendorf
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Patent number: 5151181Abstract: The liquid filter assembly including a filter housing with an inlet below a prescribed external liquid level and having a generally cylindrical filter unit inside it with reusable filter elements which effectively operate at low pressure drops and permitting bypass liquid to recirculate within the filtered section without passing through the filter element and providing a filter support frame having the filter element supported thereon to provide a changeable filter assembly unit sealingly mounted within the housing.Type: GrantFiled: March 28, 1991Date of Patent: September 29, 1992Assignee: CFR CorporationInventor: Robert M. Barry
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Patent number: 5135645Abstract: A water filter system for use in refrigerators having water dispenser and/or icemaker features. The filter system includes a commercially available filter cartridge which removes common water contaminants. A shut off valve temporarily stops the flow of water to the filter to permit replacement of the cartridge. The filter is disposed within the refrigerator for easy access and may be further disposed in a recess in one of the refrigerator walls or the refrigerator door to avoid reducing the useable food storage volume. The shut off valve may be closed by activating a conveniently located switch, by opening the refrigerator door, by opening a cover over the recess, or alternatively may be normally closed and opened only in response to activation of the icemaker or water dispenser features.Type: GrantFiled: March 28, 1991Date of Patent: August 4, 1992Assignee: Raytheon CompanyInventors: John S. Sklenak, Sol Aisenberg, Thomas J. Martel
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Patent number: 5126041Abstract: A faucet assembly with removable filter has a bottom housing portion attached to a source of water. A top housing portion that includes a spout means attaches and detaches from the bottom housing portion. A valve assembly carried in the bottom housing is movable between a closed position, blocking the passage of water through the bottom housing portion into the attached top housing portion, and an opened position permitting the passage of water through the bottom housing portion into attached the top housing portion. A filter is removably carried within the hollow interior of the top housing portion between the valve assembly and the spout. The filter makes sealing engagement with the valve assembly and with the spout as the top housing portion is attached to the bottom housing portion.Type: GrantFiled: January 18, 1991Date of Patent: June 30, 1992Assignee: Emerson Electric Co.Inventors: Thomas J. Weber, Dale L. Garrison
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Patent number: 5045198Abstract: A faucet-mounted filter in which a housing is positioned in flow transmitting relation with the water flow line. A microporous, hollow fiber filter bundle is positioned to sealingly occlude water flow through the housing so that all water flow through the housing must pass through porous walls of the hollow fibers of the filter. The pores of the hollow fiber walls are no larger than 0.22 micron, as measured by the particles that the pores pass. Thus the filter is capable of microbial filtering.Type: GrantFiled: July 5, 1990Date of Patent: September 3, 1991Assignee: Culligan International CompanyInventor: William W. Norton
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Patent number: 5028323Abstract: The invention provides a liquid filter which is economically fabricated from commercially available flat and tubular plastics stock. The filter is openable from the top of replace filter elements carried by filter pipes that are rigid with the lower casing structure, all without disturbing the inlet and outlet fittings of the filter. At the casing top there is a connector block which has both such fittings and which is permanently attached to the lower casing structure. Removably attached to the connector block is a cap construction which has an outlet manifold passage that communicates, via a separable joint, with the outlet fitting of the connector block. Non-leak separable sealing joints are provided between the filter pipes and the cap construction, at the manifold passage.Type: GrantFiled: October 31, 1989Date of Patent: July 2, 1991Inventors: Leon B. Gould, deceased, by Genevieve Gilbert, executrix
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Patent number: 4980056Abstract: A faucet-mounted filter in which a housing is positioned in the water flow line of the faucet, in flow transmitting relation with the water flow line. A microporous, hollow fiber filter bundle is positioned to sealingly occlude water flow through the housing so that all water flow through the housing must pass through porous walls of the hollow fibers of the filter. The pores of the hollow fiber walls are no larger than 0.22 micron, as measured by the particles that the pores pass. Thus the filter is capable of microbial filtering.Type: GrantFiled: August 4, 1989Date of Patent: December 25, 1990Assignee: Culligan International CompanyInventor: William W. Norton
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Patent number: 4783259Abstract: A fluid filter having a deformable filter body containing a myriad of filter passageways which may be enlarged to clean the filter by deforming the body. The presently preferred filter embodiment has a fluid permeable filter mass comprising a compact mass of pliant filter elements, such as pliant strands or strips, extending radially outward from the turns of an elastically deformable helix which has a normal axially contracted configuration wherein the helix forms an outlet passage extending longitudinally through the helix and communicating with a myriad of filter passageways extending through the filter mass and which helix is axially stretchable to enlarge the filter passageways for cleaning. A filter assembly including a filter tank containing the deformable fluid filter and having a removable cover for accessing the filter for cleaning.Type: GrantFiled: July 7, 1986Date of Patent: November 8, 1988Inventor: Charles E. Wade
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Patent number: 4645600Abstract: A fuel tank filter connected to and submerged in the tank at the end of the supply line that is particularly effective for outside fuel tanks including an inlet tube extending towards the bottom of the tank having a plurality of inlet holes proximate to the end of the tube, a fibrous filter surrounding the inlet tube, a cup surrounding the fibrous filter and the inlet tube preventing flow except over the top edge of the cup at the height of at least three inches from the bottom of the filter and a fine wire mesh covering the fibrous filter.Type: GrantFiled: April 5, 1985Date of Patent: February 24, 1987Inventor: Joseph J. Filippi
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Patent number: 4547289Abstract: A filtration apparatus for removing undesirable components from a solution to be treated, comprises a module in which a number of hollow fibers are fixed at one end thereof by cast-molding materials, and is opened at the end portion above described and closed at another end portion thereof, in which said solution to be treated can be kept from leaking out of a mechanically sealed portion. Any defect in the sealed portion can be detected from the outside by the provision of an opening which leads the leaked solution to the outside of the apparatus, instead of allowing it to combine with the filtrate. The apparatus is preferably used for the manufacture of purified water which is free from bacteria, pyrogene, and the like. Ultra-purified water of remarkably high purity can be obtained when the apparatus is used as a check filter in a process for manufacturing ultra-purified water.Type: GrantFiled: February 27, 1984Date of Patent: October 15, 1985Inventors: Yoshihiro Okano, Takehiko Okamoto, Akio Ohmory
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Patent number: 4316802Abstract: A filter, which may be used to filter particles of resin as well as protect against sudden loss of resin from an effluent discharged from an ion-exchange column, a first plate mounted between a flanged end of a first branch and a flanged end of a pipe, a second plate mounted between a blind flange and a flanged end of a second branch, and a perforated tube fitted through said branches so as to leave an annular space around the perforated tube. A first end of the perforated tube is threaded into a threaded aperture in the first plate to provide for manufacturing tolerances. A second end of the perforated tube is received by an annular groove on one face of the second plate to provide for a particle-tight seal, and the annular groove circumscribes a larger aperture in the second plate. A flanged end of a third branch is mounted to a flanged end of another pipe. A transparent sight may be provided at a fourth branch.Type: GrantFiled: October 30, 1980Date of Patent: February 23, 1982Assignee: Illinois Water Treatment CompanyInventor: Michael E. Howell
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Patent number: 4267042Abstract: A water filter, in particular for aquarium water, comprises a filter chamber having a water inlet and a water outlet and being filled with exchangable filter material, as well as a boost pump arranged downstream of the water outlet. The filter chamber is defined by an annular space between two concentric tubes of different diameters, the outer tube having as water inlet a perforation arranged spaced around its entire circumference and its entire length and the inner tube likewise being provided with a perforation around its entire circumference and its entire length. At one end of the inner tube, a water outlet line is connected, while the other end of the inner tube is closed. With this structure, the entire filter material employed may be completely utilized, and also, the exchanging of the filter material is simpler.Type: GrantFiled: September 11, 1979Date of Patent: May 12, 1981Inventor: Kurt H. Hofmann
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Patent number: 4257890Abstract: A device for separating water from diesel fuel is adapted to be used with conventional fuel filter fittings and consists of a conical screen-like member which serves to separate the water from the fuel and in which the inlet providing the fuel which may have water therein is interior of the downwardly diverging conical member. A quiet zone is provided at the base of the cone to reduce turbulence and allow the water to be drained off by an automatically operated valve which operates in conjunction with the air compressor already on the truck.Type: GrantFiled: July 25, 1979Date of Patent: March 24, 1981Inventor: Erwin E. Hurner
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Patent number: 4243531Abstract: A reservoir for blood or the like in which a rigid casing, having a perforated tubular member positioned within the casing and extending between the ends thereof, carries filtering and blood defoaming means. An improved configuration of inlet aperture means is provided. Also, the reservoir may define an upstanding central hump at its lower end, surrounded by an annular trough positioned at an acute angle to the axis of the perforated tubular member, for improved recovery of blood from the reservoir and improved calibration of the amount of blood in the reservoir.Type: GrantFiled: May 30, 1978Date of Patent: January 6, 1981Assignee: Baxter Travenol Laboratories, Inc.Inventors: Thomas W. Crockett, Patrick N. Huehls, Barry G. Slotnick
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Patent number: 4108775Abstract: A cartridge filter unit particularly adapted for use in a swimming pool water purification system because of its modular design, includes a readily accessible filter body. By removing a cover, a core assembly including a solids entrapping device and an inexpensive, disposable filter cartridge contained therein may be easily withdrawn for cleaning or replacement without allowing solid pollutants collected by the filter to re-enter the system.Type: GrantFiled: April 21, 1977Date of Patent: August 22, 1978Assignee: Jacuzzi Bros. Inc.Inventors: Robert D. Wilkes, Alan H. Peters, Virgil J. Jacuzzi
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Patent number: 4043917Abstract: A liquid filter apparatus in which a plurality of filter units are disposed in a vessel with each of the filter units comprising a perforated tube and a filter material extending around the tube. A collection manifold is located in the upper portion of the vessel and communicates with the tubes of the filter units for receiving the filtered liquid. A cover is provided separate from the manifold for the vessel and the filter units can be disposed into at least two groups extending in a vertically stacked relationship.Type: GrantFiled: April 1, 1976Date of Patent: August 23, 1977Assignee: Weil-McLain Company, Inc.Inventors: William N. Rowley, Gordon F. Ehret, Robert R. Williams
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Patent number: RE37165Abstract: A fuel filter assembly that provides a constant level of least restricted fuel flow through the fuel filter assembly during the useful life of the filter media by utilizing the least possible amount of filter media to provide the least possible pressure differential over the filter media while also providing a constant level of fuel additive by exposing an amount proportional to the filter media required for the least possible restricted fuel flow. The fuel filter assembly utilizes a vertically upward housing that houses a filter media and a fuel additive. The fuel level slowly rises in the housing as the filter media becomes obstructed with contaminants and as the fuel additive dissolves over the life of the filter media. The top portion of the housing is made of a transparent material so that the level of fuel may be easily determined, thereby allowing for an accurate and simple assessment of the useful life of the filter media and the fuel additive.Type: GrantFiled: August 9, 1999Date of Patent: May 8, 2001Assignee: Davco Manufacturing L.L.C.Inventor: Leland L. Davis