Abstract: An air filtering apparatus includes a fan body having an air intake and an air outlet. There is a fan within the body which draws air into the intake and forces it out of the outlet. There is at least one air filter between the intake and the outlet. A plenum chamber is connected to the fan body about the air outlet. The plenum chamber is a flexible bag of a sheet-like material which is inflated by air forced out of the outlet of the fan body. At least a portion of the plenum chamber is an air diffuser for air exiting the apparatus. The diffuser is more permeable than the filter.

Abstract: An arterial filter includes a filter housing provided with a uniquely shaped housing cover. The housing cover is in the shape of a toroid which forms a coil-like tunnel which is enlarged midway about the circumference of the housing cover. The highest point of the toroidal channel is at the periphery of the housing cover, approximately 180.degree. from the inlet valve. A gas vent is located at this highest point on the top of the toroid-shaped housing cover. At the center of the housing cover is an indentation which is provided to both retain a cylindrical filter element inside the filter housing, as well as allow visibility directly through the central axis of the arterial filter to verify proper operation of the filtration process. As inlet blood circulates through the toroidal tube forming the filter housing cover, gaseous matter is allowed to buoyantly escape out of the gas vent located at the top of the raised section of the toroidal channel.

Abstract: An atmospheric deaerator unit having a vessel divided into an atmospheric section and a low pressure section, the low pressure section containing steam supply line for deaerating a water spray circulated from the atmospheric section through a water circulating line using a series of spray heads for spraying water into the low pressure section, the circulating line communicating between the low pressure section and the atmospheric section, the atmospheric section having a vent open to atmosphere with a vent condenser to purge vented non-condensible gases from the atmospheric section, and, the low pressure section being pressure protected by a water column conduit communicating between the vessel sections to return overflow water and blow-through excess pressurized steam and vapor from the pressurized section to the atmospheric section, the unit being controlled by a steam control valve using pressure of the pressurized section or water temperature in the atmospheric section.

Abstract: A pulp dryer screen assembly includes a rectangular screen, a rectangular frame having four interconnected, elongated frame members and four support members, each support member being adjacent a frame member and aligned therewith. The screen has a taut inner portion and surrounding edge portions clamped between the frame members and adjacent support members. The inner portion of the screen has a pulp fiber collecting surface which has an upstream side with respect to air flow and extends along a plane. The frame and support members are entirely on a downstream side of the plane opposite the upstream side. Preferably the frame members are square tubes, and the support members have orthogonal Z-sections for small screens, and at least two orthogonal W-sections for large screens. The screen is tightened within the frame by drawing opposite support members away from each other to clamp edge portions of the screen between the support members and the frame. The support members are then connected to the frame.

Abstract: A mixture of material is transported by a vibrating conveyor (B), deposited thereon by belt conveyor (A), before an inlet (11) of a suction mouth (1). Suction mouth (1) is adjustable in all directions and by using the adjustable units (2) mounted on the suction duct (4), the height of the mouth (1) may be adjusted above the transported mixture of materials which is to be treated. The width of the opening (11) of suction mouth (1) is adjustable (20-26) to shape the mouth either symmetrically or asymmetrically. The suction power at the inlet (11) of the suction mouth (1) is regulated by adjusting its width combined with outside air supply using an air inlet valve (3) associated with suction duct (4) and adjustments of the capacity of exhaust fan (8). The exhausted air is fed to a cyclone (5) in which the materials which are sucked up and transported with the air have to be deposited.

Abstract: A cylindrical filter bag including a wire mesh cage is provided with an access opening in the cage proximate to the open end of the filter bag. A resilient snap band is provided around the outer circumference of the cylindrical filter bag. The snap band includes a pair of felt rings formed around the band and an annular groove between the rings. The snap band thus provided can be depressed into the access opening in the wire mesh cage to allow the filter bag to be readily positioned in an airtight manner within a circular hole provided in the tube sheet of a dust collector. The hole in the tube sheet is provided with a collar having a radially extended flange portion that is attached to the top surface of the tube sheet to center the collar above the hole. The wire mesh cage of the filter bag is further provided with a reinforcing sleeve that mates with the tube sheet collar, and a venturi that is positioned concentrically within the sleeve.

Abstract: The present invention is directed towards an air relief valve for a pressure vessel which automatically releases air from the system during filling with liquid, and which automatically seals when the liquid in the system reaches a predetermined level to prevent the liquid from leaving the system. The air relief valve of the present invention includes a valve body which provides communication between the pressure vessel and a series of output ports. These output ports are provide with a pressure indicator, a manual pressure release valve, and an automatic air relief valve. The manual pressure release valve is operable by the user to introduce air into the system, which is necessary during draining. The automatic air relief valve is generally a one-way valve, allowing air to exit but not enter the system.

Abstract: A filter device for filtering a gas flow, especially for filtering the gases produced by a gas generator for an impact protection cushion, comprises a filter element exhibiting several filter material plies of varying permeability lying in series in the flow direction. The filter element is fashioned as a wrapped member produced by winding up a length of filter material. The length of filter material has sectionally different filter materials, preferably wire mesh of differing mesh widths and metal fiber mats. A wrapped member is formed by winding up this filter material web, the wrapping plies of which consist of different materials with varying filter effects. This filter element wrap is inserted, for example, in the annular interspace between the two tubes of a double-tube gas generator. Owing to the rising pressure of the gas to be cleaned, the wrapped member is compacted with the consequence that its filtering function is improved.

Abstract: The present invention is directed at a filter and method for making the filter. The filter has a first filter layer of high efficiency melt blown filter medium having an efficiency of pre-HEPA to HEPA, and a second filter layer of cellulose support medium by which the first filter layer is supported. The filter is pleated, and a plurality of dimples for separating a plurality of pleats can be fabricated on the pleat tips.

Abstract: In the present invention separation is effected by means of a convergent-divergent nozzle, in which the divergent portion is convex. A supersonic flow of a gas-droplets mixture is introduced into the convergent-divergent nozzle and at the throat thereof a normal shock wave occurs and results to an abrupt change in the speed and direction of gas flow, which becomes subsonic and follows the geometry of the convex divergent portion. The droplets are inertially separated from the gas stream and two flow zones emerge, one zone free from droplets and one enriched with droplets, these two zones being subsequently separated by a separator plate. Henceforth, a conventional subsonic separator is used to receive the liquid formed by the separated droplets, whereas the zones of gas flow being free from droplets converge to be subsequently used in any desired manner.

Abstract: A canister includes a casing, a fuel reserve well defined at the bottom of the casing, an adsorbent layer provided in the casing for adsorbing fuel vapor, the adsorbent layer communicating with the fuel reserve well at a region of its lower portion and communicating with an atmosphere at its upper portion, a first communication passage defined so that the fuel reserve well communicates with a fuel system of an engine, and a second communication passage defined so that the fuel reserve well communicates with an intake system o f the engine.

Abstract: A multi-unit grease filter includes a first filter unit and a second filter unit, each having an upstream series of spaced apart elongated baffles and a downstream series of spaced apart elongated baffles offset from the upstream series of baffles so that the baffles overlap and expose the air to multiple surfaces as it travels through the filter. The baffles have their ends connected to a pair of end frame members, each of which has at least one spacer in the form of a side edge having a first portion co-extensive with the upstream series of baffles and a second portion co-extensive with the downstream series of baffles so as to provide an off-set in each of the end frame members so that when the first and second filter units are disposed in abutment side by side, the off-sets align and overlap so that a bifurcated seam line is formed at the abutment and a downstream baffle overlaps with an upstream baffle at the seam line.

Abstract: A denuder for collection of gases, consisting of a plurality of generally parallel elongated tubes having a surface formed from an inert non-metallic material, said tubes being configured and arranged to allow recovery of gaseous material collected on each said surface.

Abstract: An improved, air cleaner is provided to eliminate the detriment caused by air pollution and cigarette smoke. The air cleaner includes a removable build-in ashtray which is mounted in front of the housing of the air cleaner. At smoking, the ashtray would be opened by removing its cover. When the ashtray is full of ash, it would be removed for emptying and cleaning. The air cleaner is provided with a disposable filter pack inserted into an open slot of the cleaner housing. The filter pack contains an active carbon layer and chemical catalyst and perfume therein.

Abstract: A small modular portable flooded bed scrubber suitable for installation in confined areas is disclosed. The scrubber may be formed in a plurality of modular units, such as two or three units, and requires of minimum of accessory devices. The scrubber effluent can be removed by gravity. The pressure drop across the scrubber is low and the air velocity is sufficiently low that fan stalling and ambient noise are greatly reduced. A collector structure collects water droplets and prevents bypass of air and droplets around the entrainment module and prevents leakage at the joinery of the modules.

Abstract: A distribution system for use with a filtering cell comprising an inlet manifold rotatably mounted concentrically above a stationary separator, at least one separation chamber inside the separator connected to a vacuum source, a downwardly extending first baffle located in the separation chamber and a second baffle located outwardly from the first baffle and extending upwardly to a point above the lowest portion of the first baffle.

Abstract: An extended pocket type air filter formed of a single rectangular frame enclosing and locking a plurality of parallel header plates each having complementary projections and grooves on opposite edges, the complementary projections of one header fitting into the grooves of an adjacent header and securing pocket type air filter medium between them. A rivet secures ends of the frame to each other about the header plates.

Abstract: A filter assembly for a line replaceable unit (LRU) uses a four-walled frame to define a plenum which mounts in sealing relationship with the top surface of an LRU. The frame interfaces with the LRU through a gasket and there is a gasket on a rim extending from the LRU walls on which the filter element is superimposed such that the filter element, the walls of the frame and the perforated top surface of the LRU define a plenum. When the frame is integral to or mounted to the avionic tray that supports the LRU, the filter element is mounted to the top of the frame and the hold-down cover compresses the filter element to the frame such that intervening gaskets effect a seal between the parts so that all air entering the LRU under the influence of negative pressure applied to holes in the bottom of the LRU must pass through the large area filter element.

Abstract: A filter system for smoke or polluted air comprises a smoke or polluted air filter device, a bag filter device, and a water treatment device. A duct and a plurality of power sprayers are provided in the smoke or polluted air filter device to remove harmful substances in the smoke or the polluted air. A plurality of filtering bags are provided in the bag filter device to clean the waste liquid coming from the smoke or polluted air filter device. A plurality of treating troughs are provided in the water treatment device to purify the liquid flowing down from the filter bag device. A coarse ash collecting device is provided additionally in the filter system to collect particle ashes or dusts in the smoke before entering the smoke or polluted air filter device. Ingredients such as carbon ashes, grease or oily substances, offensive odors, poisonous substances, and etc. contained in the smoke or the polluted air may be suitably treated by the filter system.

Abstract: Improved liquid-gas contact or demister panels for gas treating equipment, wherein each panel is designed with inlet and outlet sections and is fitted with a shaped flange on one end. A high strength assembly or array of panels is provided by interlocking alignment and fastening apparatus, which includes the shaped flange, along with tabs and slots formed in each panel.