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| Number | Title | Issue Date |
| 8147693 | Multi-layer filter including retainers A multi-layer filter including a first media layer surrounded by a second media layer, a third media layer surrounding the second media layer, and at least one retainer disposed between the first and second media layers or between the second and third media layers. ... | 04/03/2012 |
| 8114291 | Pleated single phase filter coalescer element and method A filter coalescer element for oil based industrial fuels includes a rigid, porous support tube, and a hydrophobic drainage layer covering the outer surface of the same. A single phase, dual function combination water coalescer and particle filter pleat block is pos... | 02/14/2012 |
| 8017011 | Pleated single phase filter coalescer element and method A filter coalescer element for oil based industrial fuels includes a rigid, porous support tube, and a hydrophobic drainage layer covering the outer surface of the same. A single phase, dual function combination water coalescer and particle filter pleat block is pos... | 09/13/2011 |
| 7998349 | Integrity testable multilayered filter device The present invention relates to a device having two or more separate filtration layers that can be independently tested for integrity yet which allow for serial filtration through the two or more layers to obtain the desired characteristics such as retention. The d... | 08/16/2011 |
| 7935255 | Filter cartridge A filter cartridge configured as a filter-in-filter design with an inner filter and an outer filter. The filter cartridge has features, for example an overhanging lip, to engage with a lid of a filter housing in which the cartridge is installed such that the lid is ... | 05/03/2011 |
| 7887704 | Replaceable filter elements including plural filter media and related filtration systems, techniques and methods One embodiment is a filter element including an outer filter media and an inner filter media. The outer filter media is operable to remove particulates present in a flow of fluid and/or coalesce water contained in the flow of fluid. The inner filter media is operabl... | 02/15/2011 |
| 7857974 | Filter cartridge with snap fit connection A filter cartridge for use in filtering fluids, for example fuel, lubrication, hydraulic and other liquids, as well as air. The filter cartridge is a filter-in-filter design with an inner filter and an outer filter. The inner filter and the outer filter, for example... | 12/28/2010 |
| 7704397 | Coaxial full-flow and bypass oil filter having cap with blades A fluid filter includes a first filter, a second filter coaxial with the first filter, an inlet adjacent the first and second filters, a first outlet adjacent the inlet, and a second outlet at a distal end from the inlet and the first outlet. Further, the first and ... | 04/27/2010 |
| 7704396 | Coaxial full-flow and bypass oil filter with spring/gasket arrangement A fluid filter includes a first filter, a second filter coaxial with the first filter, an inlet adjacent the first and second filters, a first outlet adjacent the inlet, and a second outlet at a distal end from the inlet and the first outlet. Further, the first and ... | 04/27/2010 |
| 7635429 | Fluid filter element A compact filter element with a large filter surface area having inner and outer rings of filter material with an annular space between them, such that fluid to be filtered can be introduced into the annular space between the rings of filter material and a portion t... | 12/22/2009 |
| 7357711 | Sieve support structure for an agricultural combine A sieve support structure including an elongate first rail, an elongate second rail, and rigid elongate compression members pivotally connected to and extending between the first and second rails at longitudinally spaced locations therealong, wherein the rails and t... | 04/15/2008 |
| 7344579 | Pipe trap A pipe trap comprising a body, a disc filter, a pipe and a plurality of mesh filter suitable for filtering gases is provided. The pipe trap body has a gas inlet and a gas outlet. The disc filter and the mesh filters are enclosed inside the pipe trap body. One end of... | 03/18/2008 |
| 7323106 | Multi-element filter with multiple pleat channel height A filter has multiple pleated filter elements having axially extending channels having a transverse pleat channel height and a lateral channel width. The pleated filter elements have different channel heights. ... | 01/29/2008 |
| 7279091 | Filter device A filter device has a filter housing (10) receiving a first filter element (12), through which a medium may flow in a given direction, and has a bypass device (22). Along with the first filter element (12), a second filter element (32 | 10/09/2007 |
| 7247237 | Fluid cleaning filter and filter device A fluid cleaning filter of the present invention consists of a composite matrix composed of a pleated substrate 2 configured into a pleated shape and an active carbon-containing layer 3, wherein the pleated substrate 2 is made of polyurethane fo... | 07/24/2007 |
| 7182856 | Stormwater treatment train A system is provided for treating runoff water in which there is a separator and a filter for cleaning the water. A reservoir is provided to hold large quantities of water during prolonged rainstorms. The output of the reservoir is fed to the filter. The rate of flo... | 02/27/2007 |
| 7125434 | Deep gradient-density filter device A deep gradient-density filter device capable of effectively filtering a fluid containing a distribution of particles in the range of approximately 25 microns to approximately 0.2 micron at a fluid velocity of at least approximately 100 cm/hr and an initial hydrauli... | 10/24/2006 |
| 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 |
| 7118673 | Filter for oil containing adhesive contaminants The present invention involves a filter element assembly (10), which is useful in removing undissolved adhesive bodies from oil. The assembly includes at least one cylindrical body 11 of principal filter medium for removing particulates from oil. Body ... | 10/10/2006 |
| 7115204 | Pool pump filter A filter comprises a cage that captures a foraminous center tube. The cage comprises end plates secured to multiple posts. A screen is wrapped with at least one full inner wrap around the center tube and with at least one full outer wrap around the posts. The screen... | 10/03/2006 |
| 7087166 | Filter element and filter device having replaceable filter Providing a filter device with various functions, such as remarkable improvement of the throughput of the downstream filter, ion-removing property of the upstream filter. A filter element comprises an upstream filter and a downstream filter made of the same or diffe... | 08/08/2006 |
| 7081201 | Encapsulated filter cartridge An encapsulated filter cartridge is disclosed, which includes a filter assembly including a carbon block filter element and a microporous filter element. The filter cartridge has a permanently sealed sump defining an interior chamber configured to accommodate the fi... | 07/25/2006 |
| 6986843 | Water purifier Water purifier includes a container having a room, a filtering material disposed in the room for purifying water for catching particles and fungi such as polio viruses. The filtering material is a sintered activated carbon block filter having pores. The filtering ma... | 01/17/2006 |
| 6984319 | Environmentally friendly acid neutralizing full flow cartridge An environmentally friendly acid neutralizing filter cartridge is adapted to be mounted in a cartridge mounting body of an engine oil circuit for filtering particulates and neutralizing acid in oil. The filter cartridge comprises a support housing that comprises sub... | 01/10/2006 |
| 6962660 | Fluid filter system with secondary flow path for augmented filtration A filter system for spas and swimming pools is disclosed having a primary filter containing a porous membrane made of multiple plies. A fluid purifying medium in the form of irregularly shaped copper and zinc alloy particles is captured between the plies and placed ... | 11/08/2005 |
| 6942796 | Filter device for filtering a liquid A filter unit is disclosed suitable for use in a filter housing. The filter unit comprises superposed and spaced-apart inclined lamellar structures, preferably in the form of hollow truncated cones, each having a lower end side opposite an upper end side and a passa... | 09/13/2005 |
| 6818122 | Dual stage filter element bypass valve A replaceable cartridge type dual stage bypass valve is used in dual filter multi-media filtration assemblies. The cartridge may be selected and easily replaced to meet the various combinations and requirements of the dual filter elements (primary and secondary). Th... | 11/16/2004 |
| 6800200 | Dual-flow filter cartridge A filter cartridge configured to provide two or more levels of fluid filtration or conditioning from within a single filter cartridge is disclosed, the filter cartridge including a housing that defines an interior cavity and has an inlet portion for receiving fluid ... | 10/05/2004 |
| 6790345 | Underwater filtration operator An underwater filtration operator which can be suspended in a river, lake, pond or other water body to filter water from the water body. The underwater filtration operator may be electrically charged to discharge impurities in the water body and increase filtering e... | 09/14/2004 |
| 6712967 | Liquid filter assembly with concentric filter sleeves of bag-type media A filter element assembly has at least two cylindrically shaped and concentrically arranged filter media sleeves each connected at one end thereof to an inlet plate and each connected at the other end to a closed end terminal plate. Openings are provided in the inle... | 03/30/2004 |
| 6682651 | Barrel type fish and/or particulate screen device A barrel type fish and/or particulate screen includes mesh stretched over a supporting cylindrical shell having closed ends. The closed interior opens to a fluid withdrawal conduit, which is connected to an outlet. An inner, substantially conical withdraw... | 01/27/2004 |
| 6676834 | Self-cleaning water filter A self-cleaning water filter, coupled to a water flow having particulates therein, that includes a pair of canisters, each having a cylindrical wedge wire water filter screen. An elongated brush running the length of the screen is disposed between two con... | 01/13/2004 |
| 6666968 | Fluid filtration apparatus An oil filter assembly has an outer canister in which full flow and bypass flow filtration sections are operatively housed in a nested relationship. Oil forced into the canister has imparted thereto a vortex flow pattern which forces contaminant particles... | 12/23/2003 |
| 6641637 | Additional flow filter An open flow fluid filter has a pleated main filter element having a plurality of pleats in a closed loop having an outer perimeter defined by a plurality of outer pleat tips, and an inner perimeter defined by a plurality of inner pleat tips. The loop has... | 11/04/2003 |
| 6596043 | Air/oil separator tank with permanent drain layer An air/oil separator tank (10, 60) has a separator element (12, 62) including coalescing media (14, 64). A separate downstream drain layer (22, 72) removes the separated coalesced oil and passes clean air. The separator element is removable from the tank ... | 07/22/2003 |
| 6569329 | Personal water filter bottle system A bottle mountable filtration system typically includes a plurality of different filter elements or filtering and treatment elements having a substantially common central axis that are mounted to extend into a bottle from a cap with a manual valve. Mounti... | 05/27/2003 |
| 6540914 | Cleanable filter with spinning screen A fluid filter which comprises a canister having an open end and a closed end, the canister sealing to an adapter body to prevent leakage between the canister and the adapter body, the adapter body having a plurality of fluid inlet ports extending through... | 04/01/2003 |
| 6533941 | Flow through drain filter for a stormwater or wastewater catch basin A flow through drain filter for removing trash, sediment, liquid hydrocarbons, and metal ions comprised of at least four concentric screens having a deionizing filter material disposed between an exit screen and a second middle inner screen and hydrophobi... | 03/18/2003 |
| 6491818 | Suction strainer with an internal core tube A suction strainer includes a hollow internal core tube and an external filtering surface built around the internal core tube. A plurality of openings are defined through the side wall of the internal core tube core. In some cases the openings through the... | 12/10/2002 |
| 6488842 | Filtering device A filtering device includes a container having an inlet for introducing liquid to be treated, an annular multi-layered prepacked screen assembly provided in the container and having an outlet for treated liquid. The screen assembly includes three or more ... | 12/03/2002 |
