With Additional Support Means Not Positively Engaged Or Joined To Media (e.g., Across Face Of Filter) Patents (Class 55/501)
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Patent number: 6293983Abstract: A filter assembly for use in an air filtration unit, particularly for filtering cooking vapors. The assembly includes a filter disposed across an air flow and a grease pre-filter located upstream of the filter. The grease pre-filter is formed principally from wool fiber having an approximate density of 150-200 g/m2 and a loft of substantially 15-20 mm. The use of such a pre-filter substantially prolongs the service life of the filter before cleaning is required.Type: GrantFiled: October 4, 1999Date of Patent: September 25, 2001Inventor: Ronald More
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Patent number: 6284009Abstract: A component support system for a vehicle provides a way to firmly attach a component to a vehicle. The component support system includes a component member adapted to attach to the component to be mounted and a support member adapted to attach to the vehicle. The component member has a first mating surface with a first channel formed thereon. The support member has a second mating surface with a second channel formed thereon. The second channel is adapted to interfit with the first channel. Because the channel configurations are non-symmetric about an axis allowing the parts to interfit in only one orientation, the component support system is self-aligning. A fastener is adapted to retain the component member against the support member when the first channel is interfitted with the second channel.Type: GrantFiled: January 26, 2000Date of Patent: September 4, 2001Assignee: Paccar INCInventors: Kenneth M. Marko, Michael B. Montgomery, Rob A. Cook
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Patent number: 6274039Abstract: A cartridge filter has a filter element and a frame formed of plates. The plates are installable around the filter element and are interconnectable in the area of the sides of the plates. The plates have plug-in connection members which interact with corresponding plug-in connection members of adjacent plates to thereby affix the plates to one another.Type: GrantFiled: April 14, 2000Date of Patent: August 14, 2001Assignee: Firma Carl FreudenbergInventors: Andreas Brandhofer, Matthias Schuster, Hans-Joachim Lippold
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Patent number: 6258143Abstract: The capacity and efficiency of a filter element having pleated filter media is increased by utilizing a baffle across the upstream front area of the filter media. The baffle is preferably a web of material that is adhered to the peaks of the filter media. Preferably, the baffle is laterally offset and has a width which is in the range of 20-75% of the width of the filter media. Utilizing the baffle does not increase restriction to an unacceptable range.Type: GrantFiled: July 15, 1999Date of Patent: July 10, 2001Assignee: Dana CorporationInventors: Paul Jennings Carawan, Bruce Edward Coffey
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Patent number: 6228152Abstract: A filter device has a frame, a grid, a filter medium and, if desired, a gas adsorption medium. The frame is flexible so as to be temporarily deformable and is made of polypropylene, as is the grid. The filter medium is a mat of non-woven material and the gas adsorption medium is activated carbon.Type: GrantFiled: August 18, 1999Date of Patent: May 8, 2001Assignee: Valeo Equipements Electriques MoteurInventors: Richard Guérin, Gérard Jacq, Claude Navarro
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Patent number: 6165241Abstract: A pleat filter arrangement and method of making the same wherein longitudinally extending sheets of filter media are pleated to include pliable strips adhesively extending between at least one face of the opposed pleat faces to separate the opposed pleat faces so as to allow fluid flow therethrough, the pleated filter media being cut to size as pleated filter medium units and framed.Type: GrantFiled: March 27, 1999Date of Patent: December 26, 2000Assignee: AAF International, Inc.Inventor: Kyung-Ju Choi
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Patent number: 6152980Abstract: The present invention 10 discloses an air filter element 18 that is partially fabricated on site wherein one or more wire frames 28 are fastened to one another using a high tensile strength adhesive tape 34 to form a structure substantially conforming to the dimensions of the original equipment manufacturers' filter housings 20. The filter media 18 is attached to the rigid wire frame 28 by selectively drawing pleats 24 around a portion of a wire member 28 and securing the pleats to each other by means of epoxy coated staples 36 thereby securing the filter media 18 to the wire frame 28. Whereupon the on-site partially fabricated filter element 18 can be inserted into the channels 30 of the appropriate original equipment manufacturers filter housing 20 wherein the skirt 38 of the on-site fabricated filter element will fill and conform to the filter housing channel 30 providing an air-seal thus forcing all airflow through the air filter 18.Type: GrantFiled: March 15, 1999Date of Patent: November 28, 2000Inventor: C William Culwell
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Patent number: 6126708Abstract: An air duct has a filter mount opening originally intended to accept a shallow filter element for filtering air entering the duct. The opening has an interior flange whose original purpose was to support the shallow filter element. This flange has interior edges defining an air passage opening. The invention is implemented a filter unit including a frame and a deep filter element mounted in the frame. The frame has dimensions allowing the filter unit to replace the conventional shallow filter element with the frame inserted into the air passage opening and closely spaced to all of the interior edges. A resilient gasket is mounted adjacent to the opening's interior flange and projects slightly into the air passage opening so as to contact the deep filter element's frame. The gasket prevents air leakage between the interior flange's interior edges and the frame.Type: GrantFiled: December 10, 1998Date of Patent: October 3, 2000Assignee: Honeywell International Inc.Inventors: Joseph A. Mack, Wallace Ronald Saldin, Brad A. Terlson, Edward L. Schwarz
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Patent number: 6126707Abstract: A disposable air filter comprising a sheet of filter media, at least portions of the major surfaces of which are disposed to define parallel planes along those opposite major surfaces of the sheet intended to be placed normal to the direction of movement of air through the filter; and a frame.Type: GrantFiled: March 5, 1999Date of Patent: October 3, 2000Assignee: 3M Innovative Properties CompanyInventor: James F. Pitzen
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Patent number: 6123751Abstract: The present disclosure relates to systems and methods that use a hydrophobic medium to remove salt and moisture from the intake air of a gas turbine system. The disclosure also relates to systems and methods that use a two stage filtering process to remove particulate material, salt and moisture from the intake air of a gas turbine system. Particulate material is filtered from the intake air at a first stage air cleaner. Subsequently, salt and moisture are removed from the intake air at a second stage salt barrier located downstream from the first stage air cleaner. In certain embodiments, the second stage salt barrier uses a hydrophobic medium to remove salt and moisture from the intake air.Type: GrantFiled: June 9, 1998Date of Patent: September 26, 2000Assignee: Donaldson Company, Inc.Inventors: Benny Kevin Nelson, Mark Alan Gogins
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Patent number: 6110368Abstract: An apparatus for use in processing fluids includes a tubular porous element, a housing disposed about the porous element, and grooves and passages disposed between the housing and the porous element.Type: GrantFiled: June 7, 1996Date of Patent: August 29, 2000Assignee: Pall CorporationInventors: Scott D. Hopkins, Stephen A. Geibel, Timothy P. Pierce, Kenneth M. Williamson, Atsushi Sakamoto, Hajime Hiranaga
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Patent number: 6102978Abstract: A filter element which includes an annular filter media is surrounded by an external wrap in the form of preformed metal coil instead of a standard metal sleeve. The preformed metal coil has end portions in the form of circular hoops which are retained by adhesive, which adhesive is used to both seal the ends of the filter media and to retain end caps in place on the filter media. The preformed metal coil is of specific use with filter elements that are cleaned by back pulsing in industrial facilities, but is used in any situation where standard metal external sleeves are now used for filter elements.Type: GrantFiled: February 23, 1998Date of Patent: August 15, 2000Assignee: Dana CorporationInventor: P. Gregory Butler
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Patent number: 6103120Abstract: An apparatus for use in processing fluids includes a tubular porous element, a housing disposed about the porous element, and grooves and passages disposed between the housing and the porous element.Type: GrantFiled: August 26, 1997Date of Patent: August 15, 2000Assignee: Pall CorporationInventors: Scott D. Hopkins, Stephen A. Geibel, Timothy P. Pierce, Kenneth M. Williamson, Atsushi Sakamoto, Hajime Hiranaga
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Patent number: 6099607Abstract: An adjustably directable clean air delivery supply assembly which provides clean air for use in weather protected environments. This assembly is, doorway passable and rollably positioned, to be utilized where activities require very clean air per strict specifications. When located, the device can quickly be unfolded and positioned for operation to produce clean air in the desired direction at minimal-eddy producing airflow. Surrounding unfiltered air is drawn in just above floor level through a pre-filter into a airtight lower hollow housing, which contains an interior powered air moving assembly, and discharged upwardly into the tower hollow housing which is supported on top of the lower hollow housing. Secured to the tower hollow housing is an adjustable telescoping height and rotatable positioning structural tube, which receives and directs the air upwardly through a self-sealing bellows into the top final filter hood assembly.Type: GrantFiled: July 22, 1998Date of Patent: August 8, 2000Inventor: William J. Haslebacher
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Patent number: 6074450Abstract: A filter assembly for use in filtering air in an air conditioning system has a front grille through which air enters the assembly and a rear grille through which filtered air is exited. A frame is attached to the grilles, joining these grilles together to form a container structure. An air permeable filter element in the form of a pleated or undulating sheet is installed in the container structure, the opposite ends of the pleated sheet being attached to opposing sides of the frame. The pleated sheet runs between the front and rear grilles and extends from the top to the bottom of the grilles. The filter sheet has a filtering media which may be of microglass on the surface thereof which faces the front grille and a stiffened backing on the surface facing the rear grille.Type: GrantFiled: October 14, 1997Date of Patent: June 13, 2000Inventor: Robert R. Raber
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Patent number: 6045597Abstract: A pleat filter medium assembly wherein pleated fibrous filter medium forming troughs between opposed faces of adjacent filter medium pleats serve to include spacer inserts formed from intersecting sets of spaced strands of different cross-sectional thickness.Type: GrantFiled: June 22, 1998Date of Patent: April 4, 2000Assignee: AAF International Inc.Inventor: Kyung-Ju Choi
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Patent number: 6039779Abstract: A filter element, in particular for purifying the intake air of an internal combustion engine, constituted by a non-woven fabric or paper folded in the manner of a concertina and secured as a flat plate in a frame (10). In order to increase the stability of this filter medium (11), strut segments (19, 20) are disposed on the frame, which engage in folds in the plate and are bonded thereto.Type: GrantFiled: May 7, 1998Date of Patent: March 21, 2000Assignee: Filterwerk Mann & Hummel GmbHInventors: Thomas Butz, Ralf Kaller, Guenther Kissel, Gehard Mayer, Volker Koch, Werner Schnabel
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Patent number: 6033454Abstract: An air filter has a generally rectangular frame having surfaces defining generally a plane, and a pair of parallel side rails and a pair of parallel end rails along outer edges of the plane-defining surfaces, the rails flaring outboardly at an obtuse angle from the plane when the frame is unconfined, one of the rails at each corner of the rectangular frame being provided with tabs, and the other, contiguous of the rails at the corner having an open end into which the tab extends. The tabs have an angled outer surface and are of a length compared with the height of the open end to be held against movement clear of the open end in every position of the rails when the frame is assembled, to limit the outward flare of the rails and to ensure that the corners of the rails are substantially closed in every position of the rails.Type: GrantFiled: July 13, 1998Date of Patent: March 7, 2000Assignee: AAF InternationalInventor: Russell W. Hoeffken
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Patent number: 6027553Abstract: An air filter unit in which the generation of organic substances is restrained by controlling at least the amount of organic substances detected from a square test piece of 5.times.5 cm (25 cm.sup.2) of a filter medium so as to be 100 ng or less in the total amount of organic substances detected from the whole air filter unit at a temperature of 40.degree. C. before using. The air filter unit is assembled by housing a filter medium that has been bent in a waveform in a frame composed of 4 outer frame members and sealing the gap between the frame and the filter medium using a sealing compound. Organic substances adhering to the air filter unit are removed by blowing a cleaned air heated at 80.degree. C. against the air filter unit at a velocity of 50 ml/min for 60 minutes. Then, an air suction port and an air exhaust port of the air filter unit are sealed with a film (for example, a PET film) which keeps the unit from contacting with organic substances and from which organic substances are not generated.Type: GrantFiled: April 8, 1998Date of Patent: February 22, 2000Assignee: Daikin Industries, Ltd.Inventors: Seiichi Hirano, Toshio Kusumi, Tomizou Soda
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Patent number: 6007607Abstract: The present invention is concerned with a process for the filtering out of fibers form an air stream, in which process a stripping blade (3), for the purpose of cleaning, is moved along the surface of a filter (2) installed in a vacuum chamber (10). A controlled linear drive (51) is applied to the said stripper blade (3), by which the stripping blade (3) is made movable for the carrying out of a two phase operational motion along a linear path of travel. The end positions are located at opposite sides outside of the surface of the filter (2) in areas (A, B) wherein the stripping plate (3) is without contact with an opposing surface. During the first phase of travel, the fibrous material is scraped from the surface of the filter (2), while during the second phase of travel of the stripping blade (3) the said fibers are pressed against the filter (2) and the stripping plate (3) essentially moves back over the fiber without taking the said fibrous material with it.Type: GrantFiled: April 2, 1998Date of Patent: December 28, 1999Assignee: Rieter Ingolstadt Spinnereimaschinenbau AGInventors: Rudolf Becker, Michael Strobel
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Patent number: 5997614Abstract: A filter has a channel layer film defining a channel, a boundary layer mounted to at least a portion of the channel layer film and forming a non-adhesive boundary for the channel, and filter media disposed in fluid communication with the channel. The boundary layer typically includes a non-porous or semipermeable film. The filter is configured and arranged to provide for flow of at least a portion of a fluid along the channel and into the filter media. This filter can be used in a device as a filter over a vent in a housing of the device.Type: GrantFiled: July 13, 1998Date of Patent: December 7, 1999Assignee: Donaldson Company, Inc.Inventors: Daniel L. Tuma, Randy J. Logan, Andrew C. Dahlgren
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Patent number: 5989303Abstract: A filter apparatus for use in a forced air ventilation system, the filter apparatus having a first fan folded sheet of a washable first type of filter material, a second fan folded sheet of a second type of filter material, and fanfolds of the first and second fan folded sheets are substantially equally shaped and folded together such that the fanfolds of the first and second fan folded sheets are interdigitated to form a filter material assembly. The first type of filter material is preferably an electrostatically self-charging washable material such as woven polypropylene and the second type of filter material is preferably disposable and contains activated charcoal. The filter material assembly may be removably disposed in a rectangular filter frame for mounting the filter material assembly in the forced air system. The filter frame has at least one crank shaft rotatably deposed between two opposed side walls which are between an open front end and an open back end of the frame.Type: GrantFiled: July 25, 1997Date of Patent: November 23, 1999Inventor: Joseph Hodge
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Patent number: 5968217Abstract: An expandable filter cartridge for installation in the filter housing of a vehicle includes a rectangular frame having top and bottom legs and side legs. The side legs of the frame are extendible and retractable in length to configure the frame between a relatively compact size for insertion into the filter housing and a relatively expansive size for spanning the interior dimensions of the filter housing. The filter cartridge is installed by being inserted while in its compact configuration into a slot in the filter housing and, once inside, expanded to span the interior dimensions of the housing.Type: GrantFiled: July 3, 1997Date of Patent: October 19, 1999Inventors: Myron Stein, Ron Viskil
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Patent number: 5951729Abstract: An air filter for an for an air intake of an internal combustion engine. The filter includes a housing with a raw air inlet and a clean air outlet and an annular filter element having a pleated filter medium disposed therein. At least one buttressing element is provided to support the filter medium at the clean air side. The buttressing element has a knife-edge buttress disposed on the housing that extends to a position of maximum flexure of the filter element. The knife-edge buttress is further provided with a support shoe disposed thereon such that the shoe supports the filter element.Type: GrantFiled: June 15, 1998Date of Patent: September 14, 1999Assignee: Filterwerk Mann & Hummel GmbHInventors: Volker Ernst, Arthur Klotz, Rudolf Leipelt, Bruno Sommer
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Patent number: 5944860Abstract: A frame supports a deep filter element to allow the filter element to be installed in a duct's conventional air intake opening as a replacement for a conventional shallow filter element. The frame has a flange to mate with a surface of the intake opening's interior flange. In one embodiment, two identical side panels are assembled with the relatively stiff end panels of a particular filter element to form the frame.Type: GrantFiled: December 18, 1997Date of Patent: August 31, 1999Assignee: Honeywell Inc.Inventors: Joseph A. Mack, Wallace Ronald Saldin, Brad A. Terlson, Edward L. Schwarz
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Patent number: 5935282Abstract: A cabinet panel (10) has a filter element (12) for removing particles from cooling air used in an electronics enclosure. The filter element is removably mounted to the cabinet panel adjacent an air intake opening (14). Plugs (18) extend outwardly from the cabinet panel at predetermined locations proximate the air intake opening to releasably and matingly engage bores (30) disposed about a frame (22) of the filter element to form an air sealing relationship with the cabinet panel so that air passing through the air intake opening passes through the filter element. A cover (32) having an aperture (34) is removably mounted to the panel so that air passing through the filter element passes through the aperture. In one embodiment, the cover is removably, pivotally mounted to the panel. In another embodiment, the cover has locking arms (60) that removably engage locking slots (44) which are matingly disposed through the cabinet panel.Type: GrantFiled: November 13, 1997Date of Patent: August 10, 1999Assignee: Macase Industrial Group G.A., Inc.Inventor: Chun-Sung Lin
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Patent number: 5912370Abstract: An emission filter is provided including a tube attachment removably coupled to an exhaust pipe. A filter is mounted on the tube for filtering exhaust emitted from the exhaust pipe.Type: GrantFiled: February 12, 1998Date of Patent: June 15, 1999Inventor: James H. McConkey
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Patent number: 5893939Abstract: An air purifier, an air filter and a method of manufacturing an air filter for an air purifier are provided. The air purifier includes a base assembly, a filter assembly and a grill. A fan is mounted to the base assembly, and draws air through the filter assembly. The base and filter assemblies include adjoining walls having openings which are substantially smaller in area than the areas of the adjoining walls and area through which air is drawn in through the filter assembly. A resilient gasket having a passage approximately the size of these openings is positioned between the adjoining walls. The filter assembly is drawn towards the base assembly when the fan is operated, thereby enhancing the seal formed by the gasket against the adjoining walls. Unfiltered air is accordingly unlikely to bypass the filter assembly. The air filter is manufactured in an efficient manner through the use of a back plate having oblique end portions.Type: GrantFiled: December 11, 1997Date of Patent: April 13, 1999Assignee: Holmes Products Corp.Inventors: William Rakocy, Johnson Hsu, Neville R. Glenn
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Patent number: 5879423Abstract: A filter, especially for the interior ventilation of vehicles, including at least one filter body configured as a plate-like element and a frame surrounding the plate-like element, the frame being made from at least two frame parts joined together in the plane of the plate-like element.Type: GrantFiled: March 5, 1996Date of Patent: March 9, 1999Assignee: Filterwerk Mann & Hummel GmbHInventors: Helmut Luka, Bruno Sommer
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Patent number: 5873298Abstract: The invention relates to a dual-function filter type pot cover, comprising an outside plate, an inside plate, a diverting cover, a filter element and a switching knob, wherein the outside plate, the inside plate and the diverting cover are combined as one, while the switching knob can rotate in relation to the diverting cover, on the inside plate are air vents, on the diverting cover is a separating plate that divide it into a first space with a filter element and a cover plate and a second space with steam holes and an arched guide groove, while on the inner rim of the switching knob is a protruded obstructing plate that is located in the guide groove, so that by rotating the switching knob, when the obstructing plate is away from the steam holes, the steam in the pot will escape without obstruction from the air vent on the inside cover to the first space and out of the steam holes, suitable for cooking food with water, or on the other hand, in case the cooking involves frying with oil, the obstructing plateType: GrantFiled: June 23, 1998Date of Patent: February 23, 1999Inventor: Kwei-Tang Chang
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Patent number: 5840094Abstract: A filter assembly having first and second opposite frame members and a filter element removably secured to the first and second frame members is provided. The filter element is preferably a pleated paper filter, positioned in extension between opposite end panels. An arrangement is provided for securing the end panels to, and in extension between, the first and second opposite frame members. When the arrangement is assembled, an outer frame comprising the two frame members in the two end panels is provided. In the assembly, the pleated filter fills the area within the frame. The filter media can be conveniently removed and replaced in the frame, as desired.Type: GrantFiled: November 12, 1997Date of Patent: November 24, 1998Assignees: Donaldson Company, Inc., Honeywell, Inc.Inventors: Richard J. Osendorf, Brad Alan Terlson, Wallace Ronald Saldin, Eugene Joseph Takach, Jr., Timothy John Smith
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Patent number: 5824126Abstract: A novel soot filtering cap in a range hood includes a hood body, a soot absorbing perforated filter and a magnetic strip frame. A hook and loop fastener is provided on the peripheral rim of the vent cap of the hood body. The filter is made of fabric material having strong oil absorbability and strong gas penetrability and is fastened on the peripheral rim of the vent cap of the hood body. A plurality of vent holes are provided on the filter for smooth venting during operation of the range hood, while soot are completely absorbed by the filter. Furthermore, the plane area of the filter is larger than the cross section area of the vent cap and a protective edge is provided on the periphery of the filter.Type: GrantFiled: May 21, 1997Date of Patent: October 20, 1998Inventor: Cheng Ho Chen
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Patent number: 5817168Abstract: A filter system for an HVAC system includes a rectangular frame with a central opening. A conventional filter spans the central opening for interaction with the incoming forced air. A grid spans the filter on the incoming air side thereof, the grid presenting a plurality of horizontal and vertical spaced-apart strands having aromatic particles impregnated therein. Upon contact of the incoming forced air with the grid, the aromatic particles are transferred to the incoming air so as to scent the conditioned air. The period of material transfer of the scent particles to the incoming forced air preferably corresponds with the useful filter life, such that a cessation of delivery of the scented air is indicative to the user that the filter proper needs to be changed.Type: GrantFiled: June 11, 1996Date of Patent: October 6, 1998Inventor: Danny W. Wheless
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Patent number: 5810898Abstract: A nestable filter having a central panel with a frame attached around the peripheral edges of the central panel. The central panel has elongated corrugations which extend longitudinally from one side to the opposite side. The frame is made up of frame members which have a generally V-shaped cross-section, the inner leg of which attaches to the edges of the corrugated central panel. Corrugated voids are formed on the inner wall of at least two of the frame members, aligned with the channels formed by the corrugations, permitting the filter to nest within a similarly constructed filter.Type: GrantFiled: May 22, 1997Date of Patent: September 22, 1998Assignee: Superior Fibers, Inc.Inventor: William D. Miller
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Patent number: 5795361Abstract: In a filter element, such as an air filter element used for filtering engine air or cabin air in vehicles, a pleated filter media is disposed within a plastic frame and retained therein by the same material which is used to form a gasket for sealing with a housing in which the filter element is mounted. The gasket is formed of polyurethane foam or any other flexible sealing material such as plastisol or silicone and is cast molded around the outer periphery of the frame over a plurality of interlocking tabs. The seal is therefore mechanically locked to the frame as well as being adhered to the frame.Type: GrantFiled: March 12, 1996Date of Patent: August 18, 1998Assignee: Dana CorporationInventors: Roland Vann Lanier, Jr., Gregory Keith Rhyne
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Patent number: 5792230Abstract: An air register with a filter element for filtering particulars from the air flowing from the ductwork into a room. The filter element is replaceable as necessary and is sandwiched within a recess in the register face plate by a pivotable retaining plate. The retaining plate lockingly engages the face plate to retain the filter across the openings of the register. The retaining member facilitates replacement of the filter without having to remove or disassemble the body of the register.Type: GrantFiled: July 3, 1996Date of Patent: August 11, 1998Assignee: Melard Manufacturing Corp.Inventors: Glenn David Moore, Magno Ouano
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Patent number: 5782944Abstract: A moisture resistant air filter has a generally planar air permeable filter media with an upstream and downstream surface and a peripheral edge. A frame surrounds the filter media peripheral edge providing an inner peripheral frame surface to which the filter media peripheral edge is attached. The upstream and downstream panels are integrally formed with the frame, the upstream and downstream panels having large openings therethrough. The frame and the panels are formed of paper board of about 0.016 to 0.060 caliper and coated with polyethylene or polypropylene.Type: GrantFiled: March 18, 1997Date of Patent: July 21, 1998Assignee: Purolator Products Air Filtration CompanyInventor: Thomas A. Justice
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Patent number: 5772878Abstract: The invention relates to a liquid filtration device, comprising a substantially cylindrical housing one end of which is closed and the other end of which is connected to a head provided with an inlet and an outlet, a filtration element being provided within said housing. According to the invention the housing is formed by a tube section of the desired diameter and cut at the desired length, said tube section being closed, at its end opposite from the head of the filtration device, by a bottom piece inserted therein with a sliding fit, the outer circumferential face of said bottom piece being sealed to the corresponding part of the inner circumferential wall of the tube section by means of at least one O-ring engaged in a corresponding groove, while the bottom piece end opposite from the head of the filtration device bears on a snap ring Provided within an inner circumferential groove of the tube section.Type: GrantFiled: April 3, 1996Date of Patent: June 30, 1998Assignee: Fairey Arlon B.V.Inventors: Alexander V. Eichelsheim, Pieter Engelander
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Patent number: 5766285Abstract: The invention is a filter assembly which covers a disk drive slot to prevent the intrusion of dust and other particles into the slot. The assembly includes a filter-carrying frame which is pivotally mounted to a computer housing. When mounted to a computer housing, the frame is pivotable between an open position, wherein the frame extends outwardly to allow entry of a disk into an exposed disk drive slot, and an operative position, wherein the frame abuts the housing so that the filter of the frame prevents intrusion of dust and other particulate matter into a disk drive slot. In a preferred embodiment, the frame is formed from a pair of opposing flat members which hold the filter therebetween and which are separable to allow easy filter replacement.Type: GrantFiled: July 11, 1996Date of Patent: June 16, 1998Inventor: Shannon R. Killman
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Patent number: 5743927Abstract: A filter assembly having first and second opposite frame members and a filter element removably secured to the first and second frame members is provided. The filter element is preferably a pleated paper filter, positioned in extension between opposite end panels. An arrangement is provided for securing the end panels to, and in extension between, the first and second opposite frame members. When the arrangement is assembled, an outer frame comprising the two frame members in the two end panels is provided. In the assembly, the pleated filter fills the area within the frame. The filter media can be conveniently removed and replaced in the frame, as desired.Type: GrantFiled: October 25, 1996Date of Patent: April 28, 1998Assignee: Donaldson Company, Inc.Inventor: Richard J. Osendorf
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Patent number: 5736045Abstract: A filter element has a support member with a support tube which can abut a filter mat and which is provided with apertures for the passage of a filtered medium. The apertures are formed by the axial spaces between individual rings of the support member. The rings are supported by support walls dividing the interior of the support tube into individual chambers. Since the support member is rendered compression-stiff, it exclusively supports the filter mat when the medium flows through. The respective support wall is directly connected to the rings. Each ring with its closed annular shape surrounds the support walls on the exterior. The filtration capacity of filter elements can be improved and the weight and cost simultaneously reduced owing to the highly stable and compression-stiff support member.Type: GrantFiled: September 10, 1996Date of Patent: April 7, 1998Assignee: HYDAC Filtertechnik GmbHInventors: Peter Bies, Artur Jung, Michael Sakranchinsky, Jurgen Hausdorf
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Patent number: 5733350Abstract: A disposable paperboard container for holding a bed of solid filtration media is disclosed. The container is strong enough to prevent excessive pillowing, has sufficient open area to minimize the pressure drop across the bed, avoids bypass gaps caused by settling of media, is made of environmentally safe disposable materials which do not react with the media or absorb excess moisture, and is inexpensive enough to be discarded rather than refilled. In accordance with other aspects of the invention, space within a media container created by settling is automatically occupied by expandable plugs to prevent bypass. Container units embodying the invention may be combined to form filtration modules which are strong, yet light enough to be handled easily.Type: GrantFiled: August 13, 1996Date of Patent: March 31, 1998Assignee: Purafil, Inc.Inventors: Christopher O. Muller, James W. Mash, Jeffery F. Rabon
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Patent number: 5706777Abstract: A suction air filter for an internal combustion engine with a diaphragm carburetor, wherein the combustion engine has a suction channel for taking in combustion air from a clean air side of the air filter and for taking in fuel from a fuel chamber, wherein the diaphragm of the diaphragm carburetor controls the intake of the fuel into the fuel chamber, and wherein the dry side of the diaphragm is loaded with the pressure of the clean side of the suction air filter, has a housing and a filter body including a block of foamed plastic material and a blocking layer connected to one side of the block. The filter body is positioned in the housing such that the blocking layer is located at the clean side of the suction air filter.Type: GrantFiled: August 9, 1996Date of Patent: January 13, 1998Assignee: Andreas StihlInventors: Helmut Schlessmann, Hans-Georg Wiedmann, Rudolf Dirks
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Patent number: 5690713Abstract: A secondary air filter assembly that can be attached to the exhaust port of an upright vacuum cleaner is provided. The assembly includes an adapter plate that is adhered, clipped or otherwise affixed to the exhaust port, and a filter carrier that is removably attached to the base. The filter is preferably affixed as a unit to the filter carrier so that the entire filter/carrier unit can be replaced at once. The adapter base can also be used as an attachment for other accessories.Type: GrantFiled: January 22, 1997Date of Patent: November 25, 1997Assignee: Electrolux CorporationInventors: Leonard E. Bowerman, Jeffrey P. Chandler, Peter Hoekstra, Michael J. Kowalski, Carla B. Rogers
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Patent number: 5685894Abstract: A secondary air filter assembly that can be attached to the exhaust port of an upright vacuum cleaner is provided. The assembly includes an adapter plate that is adhered, clipped or otherwise affixed to the exhaust port, and a filter carrier that is removably attached to the base. The filter is preferably affixed as a unit to the filter carrier so that the entire filter/carrier unit can be replaced at once. The adapter base can also be used as an attachment for other accessories.Type: GrantFiled: September 13, 1995Date of Patent: November 11, 1997Assignee: Electrolux CorporationInventors: Leonard E. Bowerman, Jeffrey P. Chandler, Peter Hoekstra, Michael J. Kowalski, Carla B. Rogers
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Patent number: 5674303Abstract: A filter assembly is provided which includes a casing having an inner surface defining a fluid passage, a fluid inlet and a fluid outlet; a filter pack disposed in the fluid passage for filtering a fluid passed therethrough; and a flexible seal positioned between the filter pack and the inner surface of the casing for sealing the filter pack in the fluid passage to prevent flow of fluid between the filter pack and the inner surface and for allowing movement of the filter pack relative to the casing. One or two face screens may be positioned over the inlet and outlet, and the casing and screens are assembled without conventional fasteners or welding.Type: GrantFiled: January 16, 1996Date of Patent: October 7, 1997Inventor: Dirk Dieter Hans Ter Horst
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Patent number: 5639287Abstract: The filter system comprises a filter element (10) arranged in wave- or zig-zag-shaped folds and having flat filter element portions (12) and intermediate bending lines (14). The longitudinal edges of the filter element (10) are connected to tensioning bands (20). When the filter element (10) is stretched, these tensioning bands (20) are tensioned and in their tensioned condition fulfill a holding function for holding the filter element portions (12) in the stretched condition of the filter element (10). Thus, no spacers are required on the filter frame (22) for maintaining the stability of shape of the filter element (10).Type: GrantFiled: December 15, 1995Date of Patent: June 17, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: Peter Van de Graaf, Anton J. J. Horsten
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Patent number: 5619989Abstract: A respirator filter with a pot-shaped filter housing, with a flange at the edge of the filter housing, with a flow channel passing through the filter housing with a sealing surface, with a housing cover and with a filter element located in the filter housing is to be optimized in terms of simpler manufacture. To accomplish this task, with the housing cover located at a spaced location from and in parallel to the filter housing, a distance a between the sealing surface and the corresponding part of the housing cover, on the one hand, and a distance (b) between the flange and an outer edge of the housing cover, on the other hand, are dimensioned such that distance (a) is smaller than distance (b), so that when the housing cover is being placed on the filter housing, it comes into contact first with the sealing surface and then with the flange, while the housing cover warps.Type: GrantFiled: March 7, 1995Date of Patent: April 15, 1997Assignee: Dragerwerk AGInventor: Jens Kruger
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Patent number: 5620599Abstract: A filter assembly for decreasing fluid hold-up waste and providing uniform flow while maintaining desired flow rates and pressures comprises a housing, a filter element including first and second end caps and a filter fastened therebetween, and a sleeve. The sleeve is positioned around the filter and may be joined to the first and second end caps, thereby forming the cage as a single integral unit which is positioned within the housing.Type: GrantFiled: June 6, 1995Date of Patent: April 15, 1997Assignee: PALL CorporationInventors: Scott D. Hopkins, Timothy P. Pierce
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Patent number: 5611831Abstract: A diesel particulate filter apparatus comprises filter structures bent in a wavy profile, formed in a tubular form, and comprising ceramic fiber laminate materials formed by randomly laminating a ceramic fiber and wire nets laminated on the ceramic fiber laminate materials. First rigid members and second rigid members are fitted in and on both end portions of the filter structures. Tubular clamping members for clamping the filter structures in the thickness-wise direction thereof are provided on the outer sides of the second rigid members. Woven fabrics may be interposed between nonwoven fabrics of the ceramic fiber and the wire nets constituting the filter structures.Type: GrantFiled: November 13, 1995Date of Patent: March 18, 1997Assignee: Isuzu Ceramics Research Institute Co., Ltd.Inventors: Hiroshi Matsuoka, Hideo Kawamura, Akira Higashino, Toshiaki Sakaguchi