Abstract: The invention relates to a tank vent filter (70) that guides tank contents that have inadvertently reached the tank vent filter (70) through a downpipe (80) past a first filter (78) of the tank vent filter (70). A contamination of the first filter (78) is thus prevented by means of a space-saving arrangement. The downpipe (80) and the first filter (78) are preferably arranged rotationally symmetrically around the longitudinal axis of the tank vent filter (70) in order to achieve an especially compact design of the tank vent filter (70).

Abstract: The present invention relates to a coupling head for coupling a towing vehicle to a trailer. According to the invention, in the coupling head a filter element is used. The filter element is bypassed by a continuously open by-pass. Preferably, the path through the by-pass has at least one redirection in the region of an undercut. As a result of the redirection, contaminants in the compressed air are not or not fully transferred through the by-pass. The by-pass might also ensure a supply of compressed air to the trailer, for example, when the filter element is at least partly blocked due to the contaminants. According to the invention, a valve element used to open the by-pass in the case of increasing blockage of the filter element is not required.

Abstract: A filter apparatus comprises first and second filters, each having an upstream surface and a downstream surface. At least one bypass channel extends from a position upstream of the upstream surface of the first filter to a position upstream of the upstream surface of the second filter.

Abstract: A filter device, in particular a reflux vacuum filter, has at least one filter housing (7) in which at least one filter element (3) can be accommodated. The filter element defines a longitudinal axis (25), and has at least two valve units in the form of a bypass valve (V2) and of a pre-pressurizing valve (V1). The valve units are arranged concentric to and along the longitudinal axis (25) of each filter element (3).

Abstract: A manifold assembly used to control the flow of oxygen in an oxygen concentrator system The manifold assembly provides a series of internal pathways which receive a primary and secondary relief valves via external orifices. The manifold reduces the number of component connections and potential leak paths for control and monitoring of process media.

Abstract: The invention relates to an apparatus for producing hot gas with a first combustion chamber (2) to burn fuel (17). The first combustion chamber features an open (5) and a closed end (36), and the first combustion chamber has a fuel inlet (13) arranged at its closed end. A second combustion chamber (35) encloses the first combustion chamber, with the second combustion chamber featuring a discharge outlet (37) for the hot gas, and the second combustion chamber featuring a closed end at which an inlet for combustion air (39) is arranged.

Abstract: A residual gas cleaner, comprising a manifold assembly having at least first and second inlets and at least an outlet. The first inlet receives spent exhaust gas from an engine, and the second inlet receives clean gas from a fuel tank assembly. A housing assembly comprises a housing that is secured onto the manifold assembly. The housing collects the spent exhaust gas. The housing assembly further comprises draining means to drain the spent exhaust gas from the housing. A filter assembly comprises a filter extending from the manifold assembly and is housed within the housing. The filter assembly filters the spent exhaust gas to create filtered exhaust gas. The filtered exhaust gas exits the manifold assembly through the outlet to join the clean gas. The engine receives the filtered exhaust gas and the clean gas from the outlet.

Abstract: A dust collector includes a shell, an exit tube, an inner tube, a suction device, a first dust container, a bypass tube and a first dust bag. The shell defines a first receiving room therein. The exit tube defines an exit passage therein. The inner tube defines a connection passage which has a first opening and a second opening. The first opening communicates the first receiving room, and the second opening communicates the exit passage. The suction device provides the exit passage with a negative pressure. The first dust container defines a second receiving room therein. A mesh is disposed on a bottom surface of the first dust container to divide the second receiving room into a first chamber and a second chamber. The bypass tube defines a bypass passage therein, and it communicates the connection passage with the second chamber. The first dust bag is disposed in the first chamber.

Abstract: A filter element includes a panel construction of filter media; a filter frame holds a periphery of the panel construction; and a bypass arrangement is adjacent to the panel construction. The bypass arrangement includes a door moveable between a closed position and an open position, and a force member holding the door in the closed position until restriction across the filter media reaches a predetermined amount to allow the door to move to the open position. An example force member is a magnet arrangement or a spring. The element is installable in an air cleaner assembly. A method of filtering air directs a flow of air into a housing holding a panel filter element, and prevents bypassing of the filter element by having a bypass door remain closed by exerting a first closing force on the bypass door.

Abstract: A dust collecting unit for a vacuum cleaner is provided. The dust collecting unit includes a filter assembly for filtering foreign objects coupled to a dust collecting cover which covers a dust collecting canister (320). The dust collecting canister receives and air foreign object mixture and accumulates the foreign objects therein. The filter assembly is disposed inside the dust collecting canister and filters out the foreign objects from the mixture. A damper assembly that selectively provides outside air to the inside of the dust collecting cover is positioned within the dust collecting cover. When pressure within the vacuum cleaner is increased due to an excessive amount of foreign objects accumulated in the canister, the damper assembly is activated to allow entry of outside air to relive the internal pressure and avoid a fan motor overload. In this manner, the damper assembly can quickly react to an increase in internal pressure and avoid damage to the fan motor cause by an overload.

Abstract: There is produced (at 2) air enriched in inert gas, from a source (9) of compressed air internal to the aircraft, and this enriched air is admitted (via 10) into the fuel tank (12). During the cruising phase of the aircraft, there is produced a first fraction of air having a first inert gas content, and this first fraction is admitted into the fuel tank (12) at a first flow rate. Moreover, during the descent phase, there is produced a second fraction of enriched air having a second inert gas content substantially less than the first content, and the second fraction is admitted to the reservoir (12) at a second flow rate substantially greater than the first flow rate.

Abstract: A system for monitoring a percentage of filter life remaining of a filter assembly of filter-fan devices. The system uses a single thermistor that is operated in two separate modes for monitoring the filter assembly. The thermistor is positioned in the airflow of the filter-fan adjacent to the air outlet. A first current is applied to the thermistor for determining the temperature of the airflow from a first thermistor voltage. The first thermistor voltage is responsive to the first current applied to the thermistor. A second current that is greater than the first current is applied to the heat the thermistor. The temperature of the thermistor is determined from a second thermistor voltage which is responsive to the second current applied to the thermistor. The percentage of filter life remaining of the filter assembly is determined from the temperature of the airflow and the second thermistor voltage.

Abstract: A one-way degassing valve (4) for containers of aromatic products such as coffee and the like, comprising a valve body (5, 6), a valve element (12) and a filter (17), comprising a selective filter layer (21a), preferably consisting of activated charcoal, which allows the passage of low molecular weight gases, such as carbon dioxide, and retains high molecular weight gases that constitute the product's aroma, and an oxygen and CO2 adsorbing layer (21b), able to eliminate the residual oxygen present in the container and suitably reduce the amount of CO2.

Abstract: A filter apparatus is connected to an outlet portion of a canister mounted on a fuel supply system for a vehicle. A housing and a filter element are provided. The housing has a connection-opening portion connected to the outlet portion and atmospheric release opening portion communicating with the atmosphere. The filter element includes a frame which surrounds a filter body and is joined over its entire periphery to an inner wall of the housing, dividing an interior of the housing into a clean-side and dirty-side zone. The frame includes only one one-way valve, which allows fluid flow only from the clean-side zone to the dirty-side zone, bypassing the filter element. The filter apparatus is arranged so that fluid entering the housing by the connection-opening portion may pass through the filter element and exit by the atmospheric release opening portion.

Abstract: A filter apparatus 20 is connected to an outlet portion of a canister mounted on a fuel supply system for a vehicle. A housing 21 and a filter element 30 are provided. The housing 21 has a connection-opening portion 25 connected to the outlet portion and atmospheric release opening portion 26 communicating with the atmosphere. The filter element 30 is received in the housing 21 so that one end of a hollow portion 31a passing through the center of a filter body 31 is connected to the connection opening portion 25 from the inner side of the housing 21. The hollow portion 31a of the filter element 30 is utilized as a part of a passage for introducing fluid, which has been introduced from the connection opening portion 25 into the housing 21, into the atmospheric release opening portion 26.

Abstract: A filter apparatus 20 is connected to an outlet portion of a canister mounted on a fuel supply system for a vehicle. A housing 21 and a filter element 30 are provided. The housing 21 has a connection-opening portion 25 connected to the outlet portion and atmospheric release opening portion 26 communicating with the atmosphere. The filter element 30 is received in the housing 21 so that one end of a hollow portion 31a passing through the center of a filter body 31 is connected to the connection opening portion 25 from the inner side of the housing 21. The hollow portion 31a of the filter element 30 is utilized as a part of a passage for introducing fluid, which has been introduced from the connection opening portion 25 into the housing 21, into the atmospheric release opening portion 26.

Abstract: A gas filtering device for a light gas tank includes a tank, a control valve, a filter, a position block and a position bolt. The control valve is combined with a center hole of the tank body and has a passageway communicating with a hollow interior of the tank, with the filter positioned under the lower end of the passageway. Thus fuel gas is filtered become pure with water and miscellaneous matters removed by the filter when it flows out, so fuel gas may burn completely, with heat energy elevated in burning.

Abstract: A pressurized air supply apparatus includes an air intake section for sucking air from outside, a compressor which pressurizes and discharges the air sucked by the air intake section, a removing section for removing unnecessary components contained in the pressurized air discharged from the compressor, and a pressure adjusting section with a relief valve for discharging a part of the pressurized air free of unnecessary components for the removing section when the pressure of the pressurized air reaches a value higher than a predetermined value. An output section supplies the pressurized air pressure-adjusted by the pressure adjusting section to a load. An air recycling flow path mixes the pressurized air free of unnecessary components with air from outside. Thus, the apparatus receives the air free of the unnecessary components by air recycling to supply pressurized air of a high degree of cleanliness to the load and, at the same time, to eliminate the air discharge sound from the relief valve.

Abstract: The invention relates to a filter installation having at least one filter element for the filtering of a crude gas containing impurities, in particular particulate impurities. The crude gas flow to be filtered can be supplied to the filter installation via a crude gas line and at least two filter modules, each having at least one filter element, are provided. Each filter module is fluidly connected to the crude gas line via a module crude gas line through which a part of the crude gas flow can be supplied to the respective filter module. Each module crude gas line has a blocking member through which the supply of the respective partial crude gas flow can be interrupted for the cleaning of the filter element of the respective filter module.

Abstract: A filter condition sensor and indicator is disclosed. A filter condition sensor and indicator that responds to the presence of a predetermined collection of material in a filter operatively positioned in an output air flow path. A small by-pass air flow path is connected to the output air flow path and is separate from the filter. A heated thermistor is positioned in the by-pass air flow path. Electrically connected in series with the heated thermistor is an indicator light that illuminates when the resistance in the circuit is decreased due to predetermined cooling of the heated thermistor. In this way, a predetermined collection of material in the filter increases the flow of air in the small by-pass air flow path for cooling the heated thermistor and for lowering the resistance in the circuit to illuminated the indicator light.

Abstract: A clean air cabinet includes a blower chamber and a sample chamber separated by a filter. A blower within the blower chamber forces air through the filter into the sample chamber. A perforated wall between the sample chamber and the filter provides a pressurized zone between the wall and the filter. An exhaust plenum connects the pressurized zone with an exterior of the cabinet. A cap is provided to close off the plenum when the blower is not operating.

Abstract: A vacuum cleaner including a dirty air inlet (12, 14) communicating with a clean air outlet by way of an airflow path has a cyclone (18) arranged in the airflow path. In use, air flowing along the airflow path from the dirty air inlet (12, 14) to the clean air outlet passes through the cyclone (18). At least one bleed valve (20) is arranged in the wall of the airflow path upstream of the cyclone (18). Preferably, three bleed valves (20) are located in the wall of the airflow path and, more preferably, the bleed valves (20) are substantially identical to one another. Control may be provided for controlling the amount of air bled through the bleed valve (76) when a single bleed valve is provided.

Abstract: Various types of air cleaning devices for cleaning air fed to a passenger compartment of a motor vehicle are described. These air cleaning devices are arranged to incorporate with a cowl top structure of the vehicle. In one type, an air filter is disposed in an external air introduction passage led to the passenger compartment, and when the air filter is blocked with arrested dusts, a bypass passage is established to keep the feeding of atmospheric air to the passenger compartment. In a modified type, the bypass passage is instantly blocked and an internal air circulation mode is established. In one type, an electrostatic air collecting unit is used for arresting very fine particles in the atmospheric air fed to the passenger compartment. In order to achieve a smoothed air flow in the electrostatic air collecting unit, smoothly curved air guide passages are defined between positive and negative electrode plates.

Abstract: Various types of air cleaning devices for cleaning air fed to a passenger compartment of a motor vehicle are described. These air cleaning devices are arranged to incorporate with a cowl top structure of the vehicle. In one type, an air filter is disposed in an external air introduction passage led to the passenger compartment, and when the air filter is blocked with arrested dusts, a bypass passage is established to keep the feeding of atmospheric air to the passenger compartment. In a modified type, the bypass passage is instantly blocked and an internal air circulation mode is established. In one type, an electrostatic air collecting unit is used for arresting very fine particles in the atmospheric air fed to the passenger compartment. In order to achieve a smoothed air flow in the electrostatic air collecting unit, smoothly curved air guide passages are defined between positive and negative electrode plates.

Abstract: Method and apparatus for regenerating a particulate filter of a diesel engine. Disclosed is a particulate filter that, at all operating points of the diesel engine, can be regenerated by means of a burner working in the main engine exhaust stream. Regeneration is achieved by means of a burner (3) to which fuel and oxygen-containing gas is supplied in a variable proportion. By this means, the burner can produce the output required to achieve the regeneration temperature at any operating point of the diesel engine. The apparatus is suitable for diesel engines having thermally regenerable particulate filters.

Abstract: A moisture separator (10, 150, 200) is provided for filtering air being provided to a marine power plant. If the moisture separator becomes clogged, reducing air flow, a vacuum sensing switch (108) is closed to power panels (18, 20) to an opened position, permitting air to bypass the filtering elements of the moisture separator and flow directly to the power plant. The doors can be powered shut and latched in either position. A de-icing manifold (206) serves a dual function of spraying a de-icing fluid on the panels and also acts as a frame for the latching mechanism to hold a panel in an open position.

Abstract: A HEPA vent filter device comprising a housing having openings in front and back walls, a partition in said housing between said front and back walls positioned at an angle from vertical and defining a framed opening, extensible curtain walls on the exterior of said housing between said front and back walls, a HEPA filter, pivots mounting said HEPA filter for movement toward and away from said framed opening so that air passing through said housing in a first direction moves said HEPA filter away from said framed opening and air passing through said housing in the opposite direction moves said HEPA filter into engagement with said framed opening and a sealing gasket thereon.

Abstract: A moisture separator (10, 150, 200) is provided for filtering air being provided to a marine power plant. If the moisture separator becomes clogged, reducing air flow, a vacuum sensing switch (108) is closed to power panels (18, 20) to an opened position, permitting air to bypass the filtering elements of the moisture separator and flow directly to the power plant. The doors can be powered shut and latched in either position. A de-icing manifold (206) serves a dual function of spraying a de-icing fluid on the panels and also acts as a frame for the latching mechanism to hold a panel in an open position.

Abstract: A pressure control arrangement for a fluid line in a system, particularly a pressure swing adsorption system, wherein, in the event of a valve or control system malfunction, there is a risk of the fluid line being subject to an overpressure in an excess of its maximum design pressure, has a normally open valve, a flow restricting member, and a pressure sensor disposed in the fluid line.The pressure sensor is disposed upstream of the flow restricting member and arranged to sense the pressure in the line and to actuate the valve to close the line in the event of the sensed pressure exceeding a predetermined limit. The predetermined limit is above the normal operating pressure range of the fluid line but below the maximum overpressure to which there is a risk of the line being subject, and that portion of the fluid line upstream of the flow restricting member is constructed to have a maximum design pressure at least equal to the maximum overpressure.

Abstract: Single and multiple porous media impingement type air filter elements are disposed in filter housings which provide access to the filter elements from top opening doors or plenums in the housing for service or repair of the elements. Housing sections defining the plenums are provided with mechanism to lift and swing the housing sections clear of the filter opening, and the housing sections are movable to relieve excess working pressure differentials across the filter element. In two embodiments the filter elements are each in sealing engagement with a shield which is also sealingly engaged with a top wall or door of the filter housing to minimize contamination of personnel servicing or replacing the filter elements.

Abstract: A vacuum cleaner bag cleaning system that provides a receptacle compartment having a removable top wall having a cylindrical cleaning member extending through it into the compartment for holding an inverted cloth vacuum bag. An exhaust fan motor unit also is positioned at the top wall and draws air through the cleaning member and through the cloth pores of the bag, thus forcing out entrapped particles of dirt and general debris caught in the bag and further drawing the air from the compartment and exhausting it to the atmosphere.

Abstract: A method is disclosed for recycling industrial air. Air contaminated by particulates is removed from the area of machinery, transported to dust collectors, and filtered. A small portion of the filtered air is discharged to the outside atmosphere while a substantial portion is recycled to the area of the machinery. Significant savings of energy are realized while less particulates are exhausted with the air into the atmosphere as contaminants.

Abstract: Apparatus including an enclosed pressurized conveying and storage system that will allow potentially explosive flyash or other fine material to be handled with the minimum possibility of damage to the equipment in the event of an explosion. The steel storage vessel is maintained under slight pressure with inert gases by means of a pressure relief valve and an inert gas supply, and is kept at a high enough temperature to prevent condensation of the gas (so that corrosive acids are not formed) by electric inductance heaters and insulation. Airlock valves are used to allow the ash into and out of the transport and containment system.

Abstract: Apparatus for producing dry compressed air comprises a compressor which delivers air to a dry air storage tank through a cooling coil, a liquid separator comprising a housing having a cavity with a valve controlled tap opening at the bottom thereof, a screening filter and an adsorption filter connected in sequence. A pressure sensitive switch turns off the compressor when a predetermined pressure has built up in the storage tank. When delivery of air ceases, a valve control system opens the tap opening of the separator and second valve control system opens a valve to permit back flow of air from the dry air storage tank back through the adsorption filter to regenerate it and out of the tap opening if the moisture content of air in the dry air storage tank is above a predetermined level.

Abstract: A crop-drying system utilizing a conventional crop or grain confining bin having means for delivering drying air to the grain retained within the bin. A solar pre-heat chamber is utilized to deliver pre-heated air to the impeller, with the solar pre-heat chamber comprising an elongated tubular structure having bottom, side and top walls, and wherein the bottom wall is an opaque, highly absorbent flexible film, with the side and top walls being transparent, highly transmissive flexible films. The pre-heat chamber is coupled to an air inlet chamber, with normally closed vents being provided for responding to a clogged condition to the normal inlet port of the inlet chamber.