Did You Know...
...Daniel Webster invented a "bull plow" to pull out tree stumps. It didn't catch on because it was huge and required four oxen to pull it!
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| Number | Title | Issue Date |
| 8110099 | Stormwater filter assembly A filter assembly for use in filtering stormwater includes a bottom including a boss that includes a rib extending laterally along an inner surface of the boss. The rib includes a locking portion that mates with a corresponding locking portion on a peripheral surfac... | 02/07/2012 |
| 8087517 | Filter element A filter element has at least one plastic part, a filter medium, and a potting compound that forms a connection between the at least one plastic part and the filter medium. A connecting part is connected fixedly to the at least one plastic part. The potting compound... | 01/03/2012 |
| 7980396 | Truss type high pressure center support for liquid filtration A central support for a liquid filter is described. The support has a truss element disposable centrally in the liquid filter to provide a crush-resistant structure supporting a filter media of the liquid filter, elongated straight members of the truss element, conn... | 07/19/2011 |
| 7422119 | Cylindrical element with sloping fins for filtering element and corresponding filtering assembly The invention concerns the designing and production of filtering assemblies used for filtering liquids circulating in engines or hydraulic equipment. The invention is characterized in that a cylindrical element designed to support a filtering cartridge in a filterin... | 09/09/2008 |
| 7407057 | Plastic transmission filter A plastic transmission filter (1) composed of mating upper (2) and lower (3) shells of synthetic resin material with at least one set of registering weld posts (10) extending between inner surfaces of the upper and lower shells; a fluid p... | 08/05/2008 |
| 7374364 | Trench drain filter assembly An improved trench drain filter and modular system therefor for intercepting and treating run off water in a trench drain before discharge into a drainage system. The filter elements include a perforated pipe covered with one or more layers of geotextile material, w... | 05/20/2008 |
| 7371322 | Filtration system and dynamic fluid separation method A filtration system is provided with filter media operable to remove solids, particulate and colloidal matter from a process fluid. The filtration system may include one or more porous membranes which are anchored or secured on their periphery with a large open work... | 05/13/2008 |
| 7360658 | Extension and locking assembly for dripless element and container therefore A filter assembly includes housing enclosing a replaceable filter element. A support core is provided in the housing, and includes an extension and locking assembly. The element includes a ring of filtration media with a pair of end caps. The first end cap includes ... | 04/22/2008 |
| 7354392 | Structurally optimized hollow fiber membranes An elongated hollow microporous fiber comprises an inner wall surface defining an interior fiber lumen, an outer wall surface, and a microporous fiber wall therebetween, the fiber wall having one or more continuous, cohesive, elongated filaments embedded in the fibe... | 04/08/2008 |
| 7335300 | Fluid filter element A filter element is removably positionable within a filter housing defining a filter chamber for said filter element. The filter housing comprises a standpipe extending within the filter chamber. The filter element includes a tubular filter media circumscribing the ... | 02/26/2008 |
| 7335312 | Centrifuge with combinations of multiple features A centrifuge with combinations of multiple features is disclosed. In one aspect, a centrifuge for removing more dense material from a fluid medium includes a fluid separation wall placed within a sleeve. The fluid separation wall rotates around the axis of rotation.... | 02/26/2008 |
| 7325566 | Filtering seal for a fluid control valve A filtering seal for a solenoid valve has an annular base member which defines an axial first retainer surface and a radial sealing surface. Legs extend from the base member. An annular screen support member is attached to the legs and has an axial second retainer s... | 02/05/2008 |
| 7320721 | Chemical filter and fan filter unit having the same In a fan filter unit for filtering and continuously supplying clean air into a clean room, the fan filter unit includes a chemical filter for removing chemical contaminants contained in the air, a fan for sucking and blowing out the air, and a particle filter for re... | 01/22/2008 |
| 7320750 | Centrifuge with controlled discharge of dense material A centrifuge with controlled discharge of dense materials disclosed. A centrifuge includes a fluid separation wall placed within a sleeve to form a containment zone therebetween. The fluid separation wall aligns and rotates parallel to an axis of rotation. A recepta... | 01/22/2008 |
| 7303083 | Easy moulding filter element support tube A filter element support tube has a pair of axially extending spines and first and second sets of oppositely laterally extending half-rings axially offset from each other. The support tube is efficiently manufacturable, and desirably provides a constant diameter alo... | 12/04/2007 |
| 7294274 | Filtration system with enhanced cleaning and dynamic fluid separation A filtration system is provided with filter media operable to remove solids, particulate and colloidal matter from a process fluid. Acoustic, vibration and sonic energy may be used to clean associated filter media to allow substantially continuous filtration of proc... | 11/13/2007 |
| 7287684 | Filter cartridge assembly and method of manufacture An apparatus for filtering well fluids and method of manufacture is disclosed. The apparatus comprises an inner support, a filter spirally wrapped around the inner support, and an outer support wrapped around the filter enclosing the filter between the inner and out... | 10/30/2007 |
| 7282147 | Cleaning hollow core membrane fibers using vibration A filtration system is provided with hollow membrane filter elements operable to remove solids, particulate and colloidal matter from a process fluid. Acoustic, vibration and ultrasonic energy may be used to clean exterior portions of the hollow membrane filter elem... | 10/16/2007 |
| 7210584 | Filter device, in particular for high-pressure applications in a molten polymer filtration A filter device, in particular, for high-pressure applications in a molten polymer filtration, has a screw-in piece (10), provided with a first threaded section (12) for fixing the filter device, and a second threaded section (14) for fixing a f... | 05/01/2007 |
| 7204370 | Extension and locking assembly for dripless element and container therefore A filter assembly includes housing enclosing a replaceable filter element. A support core is provided in the housing, and includes an extension and locking assembly. The element includes a ring of filtration media with a pair of end caps. The first end cap includes ... | 04/17/2007 |
| 7191903 | Filter insert with variable length center tube A filter insert (1) having an annular filter element (2) which is connected in a fluid-tight manner to a cover (5) on one axial end face (3) and to a base (6) on an opposite axial end face (4). The filter element (2) ... | 03/20/2007 |
| 7168572 | Plastic molded center tube assembly A filter for a fluid system includes a housing having an interior cavity. A filter media is disposed in the housing and defines a central opening. A center tube assembly is arranged within the central opening and includes discs which are stackable upon one another. ... | 01/30/2007 |
| 7166210 | Oil filter cartridge The present invention relates to small vehicles such as lawn and garden tractors and more specifically to an oil filter cartridge or assembly usable with the transmissions of such vehicles. The cartridge is comprised of a filtering element, a strainer element and a ... | 01/23/2007 |
| 7153425 | Process and filter for filtering a slurry The present invention comprises a process for filtering a slurry and a filter cartridge construction for filtering a slurry having a filtration medium formed of a depth filter such as a cylindrical seamless fibrous depth filter comprising a nonwoven fibrous mass, wo... | 12/26/2006 |
| 7125490 | Porous filter A filter has a longitudinal axis with an inner diameter defined by a hollow longitudinally extending center. The filter has fingers extend radially outwardly arcuately from the longitudinal axis. The fingers have base ends near the longitudinal axis and outer edges ... | 10/24/2006 |
| 7108139 | Plastic extruded center tube profile and method of manufacture A filter for a fluid system includes a housing having an interior cavity. A filter media is disposed in the housing and defines a central opening. A center tube is arranged within the central opening and includes a plurality of helical fins extending radially outwar... | 09/19/2006 |
| 7090773 | Coaxial full-flow and bypass oil filter An improved combination full flow bypass oil filter is presented where the output of the bypass filter is obtained by non-venturi means and the extremely clean bypass filter output is measurable at all engine oil pressures. The bypass filter output is not blended wi... | 08/15/2006 |
| 7090772 | Filter bag assembly A filter bag assembly includes an outer bag having an open end, a closed end opposite the open end, and a longitudinal axis. The open end of the outer bag is sized and shaped for receiving liquid to be filtered. A filter member is loosely mounted in the outer bag an... | 08/15/2006 |
| 7086537 | Extension and locking assembly for dripless element, and container therefore A filter assembly includes housing enclosing a replaceable filter element. A support core is provided in the housing, and includes an extension and locking assembly. The element includes a ring of filtration media with a pair of end caps. The first end cap includes ... | 08/08/2006 |
| 7073520 | Washing machine with clog proof lint filter The filter (3) comprises transversal walls (11) forming a labyrinth-like path with the inner surface of a hollow body (6) that is part of the water outlet circuit of the machine. On the peripheral edge of the said transversal walls (11) t... | 07/11/2006 |
| 7059481 | Filter element A filter element (10) having a supporting body (11) around which a filter medium (12) is wound. The filter medium (12) is a weldable material and is sealingly affixed to the supporting body (11) two radial weld seams (18) an... | 06/13/2006 |
| 7056432 | Tank mounted oil filter assembly The present invention relates to small vehicles such as lawn and garden tractors and more specifically to an oil filter assembly used with the transmissions of such vehicles. The filter assembly is housed within the transmission case to reduce mounting brackets outs... | 06/06/2006 |
| 7033497 | Filter cartridge A filter cartridge formed by winding, in a twill construction, a band-shaped unwoven cloth, which contains thermoplastic fibers and at least a part of its fiber intersections are stuck thereon, so that a cylindrical shape can be obtained, wherein 1. two types of fil... | 04/25/2006 |
| 7033502 | UV lamp supported filter cartridge Each cap of a pair of end caps mounted on opposed ends of a conventional radial flow cylindrical filter element of a filter cartridge includes a circular sleeve extending axially from the filter element for penetrably receiving a supporting stud and for maintaining ... | 04/25/2006 |
| 7025493 | Chemical supply system and chemical mixing apparatus A chemical supply system includes at least two supply pipes for supplying at least two different chemicals; a mixing unit connected to the supply pipes for mixing at least two different chemicals to form a chemical mixture, an exhausting unit for exhausing the chemi... | 04/11/2006 |
| 6997404 | Porous plastic fuel filter for a fuel injector An improved filter assembly for a solenoid-actuated fuel injector having a fuel-resistant porous filter element in a filter retainer tube for disposition in the fuel tube of the fuel injector. Fuel flow through the filter element is axial. The filter retainer tube r... | 02/14/2006 |
| 6986426 | Extension and locking assembly for dripless element, and container therefore A filter assembly includes housing enclosing a replaceable filter element. A support core is provided in the housing, and includes an extension and locking assembly. The element includes a ring of filtration media with a pair of end caps. The first end cap includes ... | 01/17/2006 |
| 6986842 | Filter element with foam girdle to secure pleats and method of forming same A fluid filter element (10) comprises a pleated filter media (34) having spaced apart pleats (40) and an external filter media surface (38) comprising the external peaks of the pleats (40) and a flexible foam filter media sleeve ( | 01/17/2006 |
| 6983851 | Extension and locking assembly for dripless element, and container therefore A filter assembly includes housing enclosing a replaceable filter element. A support core is provided in the housing, and includes an extension and locking assembly. The element includes a ring of filtration media with a pair of end caps. The first end cap includes ... | 01/10/2006 |
| RE38917 | Fluid filter with filter bypass valve and sealing surface on filter element side In a fluid filter with a housing and a filter element replaceably located in said housing, and with a filter by pads valve having a valve body held in the housing that is movable against the action of a spring from the closed position in which it cooperates with a s... | 12/13/2005 |
