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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 8157989 | Filter relief valve and filter cartridge assembly seal A filter includes a housing having a cavity. A media pack, which includes a filter media, is arranged within the cavity and includes a central opening extending between opposing ends of the media pack. A center tube is arranged within the central opening and extends... | 04/17/2012 |
| 8118998 | Self-adjusting minimum load filter cartridge and bypass valve A combination full flow media and bypass media filter cartridge for filtering fluid in an internal combustion engine. The apparatus includes a venturi filter having a full flow media attached to and extending between a first endplate and a second endplate. The secon... | 02/21/2012 |
| 8105485 | Filtering system, in particular for filtering liquids in internal combustion engines A filtering device for filtering liquids in internal combustion engines has a filter housing and a filter element inserted into the filter housing. A cover disk closes off the filter housing. The cover disk consists of two individual disks and a central flow connect... | 01/31/2012 |
| 8083938 | Filter end cap assembly with bypass valve A filter assembly, filter element and methods are provided. The filter assembly includes a filter base in which a filter element is mounted. The filter element includes a bypass valve carried by the filter element that operates independent of and free of interaction... | 12/27/2011 |
| 7981279 | Oil filter with bypass valve An oil filter assembly has a bypass valve and a cover formed with an orifice. In order to provide a simple contamination indicator for the oil filter, there is provided a deflection device that deflects an oil jet emerging through the orifice when the bypass valve i... | 07/19/2011 |
| 7479219 | Filter device for fluids and method for filtering fluids A filter device 10 for fluids, especially for motor oil, hydraulic oil, has a filter case 1 comprising one or two filter inlets 2 and one filter outlet 3. The filter case contains one filter 4 consisting of at least two ring-shaped... | 01/20/2009 |
| 7438800 | Arrangement for filtering hydraulic fluid An arrangement for filtering a hydraulic fluid having a bypass line connecting the feed channel to the discharge channel where the bypass line is opened by a pressure switching valve when a pressure change is caused by the contamination of the filter element. ... | 10/21/2008 |
| 7435341 | Pressure relief valve for filter assembly An oil filter assembly includes a pressure relief valve adaptable to wide variety of environments while maintaining ease of assembly and manufacture. The pressure relief valve of this invention also occupies a minimal amount of space within the filter assembly as co... | 10/14/2008 |
| 7413649 | Treatment apparatus with modular chemical containing units having one-way valve assemblies A fluid treatment system that includes at least one treatment module (“pod”) with rigid and impermeable inner and outer surfaces, and an annular center passage which is designed to provide an alternative flow path during the pod backwashing process. At least one... | 08/19/2008 |
| 7413089 | Reusable cartridge oil filter A replacement filter for conventional throw-away spin-on oil filter cartridge on an internal combustion engine. The replacement filter uses a porous metallic filter element, preferably a woven stainless steel, pleated filter element, within a housing physically simu... | 08/19/2008 |
| 7410575 | Fluid filter and cap member A three-piece filter system comprises a base, a deep pocket filtering media, and a housing shell. The base is adapted to be fitted/threaded onto an engine block, with a sealing surface to provide a seal with the engine block. The filtering media and cap member is pl... | 08/12/2008 |
| 7393455 | Method and apparatus for filtering pressurized fuel A method and apparatus for filtering pressurized fluids, wherein a fluid level provides a visual indicator as to the general condition of the filter element. The present invention provides a vertical housing having a fluid inlet for communicating the fluid into said... | 07/01/2008 |
| 7371321 | Fluid filtration system A filtration system (10) for removing contaminants from a fluid is provided. The system includes a housing (44) having a convex shaped base (78) and a top (84), with filter media (46) disposed within the housing. The filter media m... | 05/13/2008 |
| 7370701 | Wellbore completion design to naturally separate water and solids from oil and gas A wellbore completion design is provided, which creates a convective flow action that separates water and sand from hydrocarbons during production of the hydrocarbons from a subterranean formation. A deviated section of the wellbore creates the desired effect. The w... | 05/13/2008 |
| 7363917 | Filter unit and valve for a fuel supply system A valve (49) which is intended for insertion into the line connecting a fuel pump to a system of injection valves and which is designed as a pressure-maintaining valve is characterized by a pipe body (50) intended to have a flow passing through it, int... | 04/29/2008 |
| 7357865 | Automatic transmission fluid filtration system An automatic transmission fluid (ATF) filtration system that combines both coarse filtering mesh and microfine depth filtering elements simultaneously to remove a wide range of particulate matter, but also maintains an unrestricted flow of ATF to the pump to ensure ... | 04/15/2008 |
| 7357745 | Travel working machine A travel working machine includes a traveling body 2 supported by traveling contrivances such as wheels 3, 4 and provided with an engine 5, a transmission case 8 mounted to the traveling body, and a hydraulic mechanical transmission mount... | 04/15/2008 |
| 7354511 | Hydraulic unit for industrial trucks A hydraulic unit for industrial trucks, comprising a motor pump unit which is directly attached to a tank, a reflux filter which has an elongate filter casing for a filtering element adapted to be introduced into the tank through an opening, a hose coupling, and an ... | 04/08/2008 |
| 7350509 | Delivery unit The invention relates to a delivery unit (2) comprising a swirl pot (5), a fuel pump (6) placed therein, and a filter, which is placed on the bottom (7) of the swirl pot (5) and which is radially flowed against. This filter is form... | 04/01/2008 |
| 7344636 | Separator A separator comprises a gully chamber 2 having inlet and outlet ducts 10, 12. Inlet and outlet housings 20, 22 are disposed within the separator and are connected by a bypass duct 24 which extends around the wall of the chamber 2. ... | 03/18/2008 |
| 7338599 | Filtration systems and fitting arrangements for filtration systems A filtration system comprising a manifold and a filter having fittings, wherein a carriage supporting the filter is operatively associated with a mounting mechanism to move the fitter between a position in which the filter is spaced from the manifold and a position ... | 03/04/2008 |
| 7335298 | Modular aquarium filter A modular aquarium filter includes one or more cartridges connected in series. The cartridges may contain filter media for chemical, biological and/or mechanical filtration. In addition, the cartridges are designed such that they provide a unique internal helical ge... | 02/26/2008 |
| 7329337 | Universal filter base and engines using same Filters that remove particulate and other solids from fluids often come in various sizes and include various types of seals. However, filter bases to which the filters are attached are generally manufactured to accommodate only one specific size of filter including ... | 02/12/2008 |
| 7329342 | Metallic particle trap bypass filter A metallic particle trap bypass filter is disclosed generally comprising a housing, a filter element disposed therein, an inflow chamber, an outflow chamber, a bypass valve connecting these chambers, and a magnet disposed in the outflow chamber. In some embodiments,... | 02/12/2008 |
| 7326269 | NBC filtration unit providing unfiltered and filtered air paths A filtration unit for use with an environmental control unit (ECU), usually a portable ECU, which includes at least two air flow paths wherein at least one of the air flow paths allows for use of air which has not passed through a nuclear, biological, and chemical (... | 02/05/2008 |
| 7323105 | High capacity direct flow filter with maintained channel width A direct flow filter includes a pleated filter element filtering fluid flowing axially therethrough parallel to the wall segment pleat tip bend lines. Embossments on the wall segments have a height extending along a lateral direction into a respective flow channel t... | 01/29/2008 |
| 7323103 | Multifunctional shutting device for lubrication filter A multifunctional shutting device for a lubrication filter includes a safety device with triple valve shutting. The safety device includes a first valve for closing the oil intake in the filter with a view to dismantle the filter, a second bypass valve that opens wh... | 01/29/2008 |
| 7316778 | Staged oil filter incorporating pelletized basic conditioner An improved oil conditioning filter, for use with an internal combustion engine, includes a mechanically active filter element and a chemically active filter element having a reactive basic conditioner therein. The reactive basic conditioner is provided to counterac... | 01/08/2008 |
| 7314572 | Methods of and apparatus for low-angle-tray settling with multi-zone configuration Settleable-particles are separated from a dirty flow of settleable-particles and fluid by trays having a planar section configured with opposed ends and opposed sides, and an entrance edge and an exit edge on opposed ends. The section has opposed side edges, and an ... | 01/01/2008 |
| 7314547 | Fountain solution recycling system for commercial printers A method of and apparatus for extending the life of fountain solutions used in commercial printing presses comprises withdrawing fountain solution from the dampener recirculation system of a printing press and directing the withdrawn fountain solution through a sedi... | 01/01/2008 |
| 7291277 | Method and device for cleaning the fountain solution of a printing press A method for cleaning the fountain solution of a printing press with an automatically emptying separator (16), separates the dirt particles and oil residues from fountain solution and supplies them, as a mixture of dirt and fountain solution, to a dirt and fo... | 11/06/2007 |
| 7291264 | Staged oil filter incorporating additive-releasing particles An improved oil conditioning filter, for use with an internal combustion engine, includes a mechanically active filter element and a chemically active filter element containing a beneficial additive therein. The beneficial additive is provided to extend the useful l... | 11/06/2007 |
| 7284569 | Steam valve In a steam valve, a strainer is arranged between a valve body and a valve casing in which the valve body is accommodated, and a screen assembly is mounted on an outer peripheral portion of the strainer. The screen assembly includes a temporary screen unit and a perm... | 10/23/2007 |
| 7282140 | Sump filter with filter element cartridge A sump filter assembly wherein a filter element that may or may not be removably disposed in a filter housing is sealingly engaged with the filter housing by way of a sealing member to separate the filter housing cavity between dirty and clean spaces. The filter ele... | 10/16/2007 |
| 7281904 | Transmission pump and filter The filter housing has a filter outlet portion with a central filter outlet passage. The outlet portion includes a terminal end portion defining a filter nozzle. The filter nozzle forms a nozzle passage between the filter nozzle and the pump housing. The nozzle pass... | 10/16/2007 |
| 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 |
| 7267768 | Liquid filter A liquid filter, in particular for internal combustion engines, having a filter housing with an essentially hollow cylindrical filter element arranged therein in a sealing manner to separate an unfiltered liquid side of the filter from a filtered liquid side. The fi... | 09/11/2007 |
| 7258783 | Fluid delivery system for a water tub using a removeable chemical carrier A water tub including a fluid delivery system utilizes a removeable carrier to provide fluids to the fluid delivery system. In some instances, the carrier is disposable such that depletion of the fluids within the container results in the carrier being thrown away a... | 08/21/2007 |
| 7252759 | In-tank return line filter element and hydraulic reservoir with same A top or bottom mounted, in-line, in-tank return line filter element is mounted in a hydraulic reservoir. The reservoir includes a holding tank, at least one outlet extending from and one return line extending to the reservoir, an in-tank return line within the rese... | 08/07/2007 |
| 7244357 | Pumps for filtration systems Improvements in product water throughput from a reverse osmosis (RO) membrane filter achieved by thinner feed spacers in the RO element, enhanced recovery (ratio of permeate to feed), pressure recovery of the retentate fluid pressure opposing the feed water pressure... | 07/17/2007 |
