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| Number | Title | Issue Date |
| 4448683 | Liquid filtration system with level-responsive contaminant removal and air flow control for vacuum producer A system for optimizing operation of liquid filtration equipment having a first electric motor for periodically removing the layer of solid contaminants on the filter media through which the liquid passes, and a second electric motor which drives a centri... | 05/15/1984 |
| 4440642 | Separating and cleaning apparatus for cooling lubricant Apparatus for returning cooling lubricant, which adheres to the swarf when machining metals, consisting of the combination of a swarf conveyor 2 for discharging the swarf with a vacuum filter unit 3 located therebelow for cleaning the cooling lubricant co... | 04/03/1984 |
| 4427543 | Automatic tape filter A tape filter device for the removal of solids from liquid media having a weir assembly, which enables solids to be carried out by the water flow, into which a tape head support member having filtrate passages therein is immersed, such that liquid media f... | 01/24/1984 |
| 4421647 | Filter with indexable filter web An indexable filter web is advanced downwardly into and then upwardly out of a pool of dirty coolant by a perforated flexible belt. Rotatable wheels shape the belt and the web into a circular configuration with the bottom of the web defining the bottom of... | 12/20/1983 |
| 4396505 | Filtration system pump arrangement A filtering device including a tank partially located below floor level having a filtrate compartment and a filter means interposed therebetween. Reservoir means and an end suction centrifugal pump means both located substantially on floor level wherein c... | 08/02/1983 |
| 4389315 | Filter device with permeable corrugated grid panel A filter device for separating a foreign material-liquid mixture into distinct portions includes a holding tank. On a bottom of the tank is a permeable grid panel formed with a series of elongated corrugations. The panel connects with an impermeable incli... | 06/21/1983 |
| 4362617 | Liquid filtering apparatus Apparatus for extracting used portions of filter media sheets from between vertically stacked and separated plates of a liquid filtering apparatus and for simultaneously advancing fresh portions of the filter media sheets from supply rolls into the space ... | 12/07/1982 |
| 4359388 | Fluid filter A dust removing fluid filter has a continuous filter material web wound about a rotatable drum. The free end of the web is attached to a collector shaft which winds up the filter material web as it becomes contaminated.... | 11/16/1982 |
| 4343701 | High pressure flat bed filter In a filter device a filter media belt is positioned over a horizontal grid panel. Ends of the belt extend beyond the panel and each is attached to a rotatable forward and rear spool carried outside a cover which encases the grid panel. The cover defines ... | 08/10/1982 |
| 4289615 | Filter media mover for plate type filter A filter media supply and extraction apparatus for a plate type liquid filtering device having a stack of separable filter plates. The extraction mechanism comprises a driven roller for each sheet of filter media in combination with an adjacent, movable b... | 09/15/1981 |
| 4289616 | Apparatus for removing suspended solids from an effluent The apparatus herein provides a separation of suspended solids from a liquid containing such suspended solids. The apparatus comprises a base which supports a pan having a bottom wall, a spaced-apart pair of sidewalls extending upwardly and outwardly from... | 09/15/1981 |
| 4282095 | Aquarium filtering system An aquarium filtering system utilizing an immersible housing having perforations on two opposed surfaces, an external supply and take-up means for filter material. The immersible housing and the portion of the filtering system positioning the supply and t... | 08/04/1981 |
| 4274961 | Pressure filter An automated plate and frame type of pressure filter comprises a plurality of vertically superimposed horizontal shells, each vertically adjacent pair of which having a horizontal filter media belt sandwiched therebetween. All shells but the bottom shell ... | 06/23/1981 |
| 4267060 | Travelling sheet, flat-bed vacuum filter and method To seal the top cover of a vacuum travelling web filter, the top cover is lowered, by gravity, with a depending rim fitting against an upstanding rim of a filtrate chamber pan; the contaminant chamber above the filter web is closed off, and supply of filt... | 05/12/1981 |
| 4263805 | Solid impurity detector A device is provided for detecting the presence of solid impurities within a pressurized fluid. The device comprises a housing having a fluid passageway formed therein. One end of the fluid passageway is open to the pressurized fluid while the other end o... | 04/28/1981 |
| 4260496 | Filtration process and apparatus Disclosed is a filtration process for separating solid, sludge-like and dissolved constituents from effluent, comprising the steps of introducing under an elevated pressure the effluent into a tube-shaped filter having a closed end and an open end, the tu... | 04/07/1981 |
| 4238877 | Fabrication of screen devices Screen devices for use with an automatic screen changer (10) of an extruder (11) are fabricated from a screen preform (32) including an elongated carrier strip (36) having a plurality of screen elements (33--33) connected thereto. The screen changer (10) ... | 12/16/1980 |
| 4233157 | Travelling sheet, flat-bed filter apparatus and system Fluid supplied from a contaminant tank holding the fluid to be filtered, and delivered at a filtered fluid outlet, is supplied to a filter housing which defines a chamber therein subdivided by a perforate divider plate over which the filter paper is guide... | 11/11/1980 |
| 4229202 | Wastewater treatment with ultraviolet disinfection and increased capacity A method and an apparatus for treating wastewater such as sewage are disclosed. Designed principally for complete on-site wastewater treatment and disposal, the system separates wastewater into liquid wastes and solid wastes by filtration, treats the liqu... | 10/21/1980 |
| 4220539 | Edge seals for liquid filters An improvement in the edge sealing of the filter medium supporting conveyor of a flat bed filter is disclosed. The edges of the conveyor ride along and frictionally engage internally extending shelves formed on each side wall of the filter. The conveyor i... | 09/02/1980 |
| 4203836 | Method and apparatus for removing precipitated suspended solids from an effluent A method and apparatus for conducting the method is provided for separating suspended solids such as, nickel, chromium, zinc, copper, iron, etc., from a liquid containing such solids. The method comprises contacting such a liquid containing suspended soli... | 05/20/1980 |
| 4201675 | Liquid filter with novel seal means A liquid filter using a sheet of filter medium on a moveable conveyor where a contaminated liquid forms a pool above the conveyor and filter medium and is filtered therethrough into a filter compartment, contaminated liquid and filter being sealed from on... | 05/06/1980 |
| 4196083 | Apparatus and method for continuous plating bath treatment system A continuous plating bath treatment system directs contaminated plating solution through a specially prepared filter medium and returns the filtered solution to service. The filter medium is a calendered polyester material provided in continuous roll form... | 04/01/1980 |
| 4167875 | Filtration method and apparatus Apparatus for treating samples comprising a sample holding element; a wash trough removably positioned over the sample holding element; transfer tubes or conduits in sample receiving contact with the sample holding element, extending through the wash trou... | 09/18/1979 |
| 4159247 | Locking filter apparatus and method Filter apparatus and method comprising a pair of filter shells having communicating flow passages and a filter media between the shells. Upon the clogging of the filter media, the inflow of liquid is stopped, the shells drained of remaining liquid and sep... | 06/26/1979 |
| 4147114 | Waste treatment system The discharge end portion of a sewage delivery tube is surrounded by the input end portion of a conveyor pipe. A long, flat strip of consumable filter material is inserted through the annular space between them and into the conveyor pipe. Prior to this in... | 04/03/1979 |
| 4137062 | Filtration with a compostable filter medium A method and apparatus for treating wastewater such as sewage are disclosed. Designed principally for complete on-site wastewater treatment and disposal, the system separates wastewater into liquid wastes and solid wastes by filtration, treats the liquid ... | 01/30/1979 |
| 4133757 | Apparatus and method for continuous plating bath treatment system A continuous plating bath treatment system directs contaminated plating solution through a specially prepared filter medium and returns the filtered solution to service. The filter medium is a calendered polyester material provided in continuous roll form... | 01/09/1979 |
| 4080297 | Automatic filter screen exchange apparatus for an extruder A hollow cylindrical breaker drum is rotatable and mounted in a cylindrical chamber of a main body to be connected to the forward end of the extruder and a band-like filter screen is introduced into the cylindrical chamber from the outside through a slit ... | 03/21/1978 |
| 4054521 | Indexing mechanism The invention relates to a continuous and controlled filter device that filters gases and liquids while maintaining a low differential pressure across the filter element. The device automatically advances clean filter medium into the filter seat or window... | 10/18/1977 |
| 4048074 | Apparatus for separating solids from liquids or gas To separate solid particles from liquids or gas, the liquid or the gas is passed through a coil, formed from one or more threads wound on a carrier. After subsequent washing and drying, the solid which has been filtered out during the filtration process i... | 09/13/1977 |
| 4021346 | Filter for plastic extruding machine Apparatus for filtering heat-softened plastic material under pressure of extrusion comprising a substantially continuous screen with screw means for positively moving the same past the filtering area, said screw means being located in a passage open to th... | 05/03/1977 |
| 4010391 | Method of using multiple stressed sealing plugs to filter polymeric material A sealing port for a filtering device of the type disclosed and claimed in U.S. Pat. No. 3,471,017 is described. The sealing port has two separate sections in uninterrupted communication with one another for sealing purposes but thermally isolated from on... | 03/01/1977 |
| 4005018 | Liquid filtering apparatus A liquid filter immersed in a contaminated liquid, defines an open space therein receiving filtered liquid in a bottom portion thereof through a filter medium disposed thereabout, with power operated means for removing spent filter medium while fresh filt... | 01/25/1977 |
| 3979299 | Pressure filter with continuously or intermittently movable filter cloth The invention relates to an apparatus for filtering fluids comprising a magazine chamber from which the cloth is transported continuously or intermittently over a supporting sieve to a receiving chamber. As the cloth passes through the filtered product wi... | 09/07/1976 |
| 3940335 | Filtering process and apparatus A process and apparatus for filtering substances by introducing a filter band across a passageway through which the substance flows, the filter being passed through inlet and outlet ports sealed to prevent leakage therefrom for example by thermal solidifi... | 02/24/1976 |
| 3933650 | Apparatus for filtering fluids An apparatus for filtering fluids to remove solid discard particles therefrom, in which the apparatus includes a housing having a filter chamber, an inlet-side sealing chamber, and a discharge-side sealing chamber, a movable fluid inlet member which is mo... | 01/20/1976 |
