Abstract: Described is a filter cartridge having a clean side anti-drainback valve. The filter cartridge includes an annular filter element having a hollow core with an annular valve support 40 disposed therein. The clean side anti-drainback valve includes a valve 60 and an annular valve seat 70 having a base, a central opening, and a peripheral flange 82. The peripheral flange is mounted atop an upper surface 90 of the annular valve support such that the central opening is in alignment with the passage 50 leading out of the filter cartridge. The valve 60 is mounted on the valve seat and is biased by a coil spring to a normally closed position so that when the engine is not running clean side oil is retained within the filter cartridge. A dirty side anti-drainback valve can also be included.

Abstract: A screen plate (1) for screening of pulp suspensions, comprises a number of elongated at least partially curved screen slots (3). According to the invention every screen slot has a width which is maximally 0.8 mm, and the screen slots bend in such a way that a straight rod, which has a breadth which is less than the width of the screen slot and the length which is 5 mm, is prevented from passing through the screen slot, when the rod extends along the screen plate, independently of how this rod is oriented in relation to the screen slot. At that elongated stiff shives may be separated more efficiently by means of the screen plate. This screen plate may also be used for separating a pulp suspension into a first fraction comprising comparatively stiff fibers and a second fraction comprising comparatively flexible fibers.

Abstract: A device for performing a post-column derivatization in connection with liquid chromatography includes a separating column, a detector, an eluent withdrawal unit, connected to an outlet of the separating column, that withdraws eluents from the separating column, a reagent supply unit, arranged between the outlet of the separating column and an inlet of the detector, that supplies reagents to the eluents withdrawn from the separating column and a pump that simultaneously pumps eluents from the eluent withdrawal unit and pumps reagents to the reagent supply unit, wherein the pumping of reagents takes place free of pulsations.

Abstract: A centrifuge, especially a flow-through centrifuge free of rotating seals, for centrifuging biological fluids has a stand on which a frame (1) is rotatably mounted. A centrifuge chamber (3) is rotatably mounted on the rotating frame (1) to rotate about the axis of the latter. The centrifuge chamber (3) is driven in the same direction of rotation as the frame (1) but at twice the rotational speed. Coupling elements which are engaged by magnetic forces and are designed in the manner of a clutch disk or a gearwheel are used to transmit the torque to the centrifuge chamber or the rotating frame. Force is transmitted in a non-contact and wear-free manner. No lubrication is necessary, which also reduces the buildup of dust and dirt. In addition, there is little generation of noise.

Abstract: An inline filter having a swivel right-angle fitting for coupling an inlet or outlet tube. The fitting includes a stem having a pair of O-rings and a distal ridge and notch. The cap of the filter includes a port having a plurality of annular, resilient tabs that engage the notch and ridge to retain the fitting to the cap.

Abstract: Disclosed is an agitator assembly which comprises an agitator and means for mounting the agitator assembly on top of a tank. The agitator comprises a shaft, a propeller fixed to one end of the shaft, and means for rotating the shaft to provide an axial discharge from the propeller of at least 4.0 m/sec with a flow equivalent of at least 0.2 tank volumes/minute. The agitator is mounted on top of the tank so that the shaft enters the tank at an angle a to the longitudinal axis of the tank of between about 30 and about 60 degrees and at an angle &bgr; to the transverse vertical axis of the tank of less than about 50 degrees. Also disclosed is a method of shipping solids that are soluble in a solvent. The solids are placed in a tank on which the agitator assembly has been mounted. The quantity of solids placed in the tank exceeds the amount that will dissolve when the tank is filled with the solvent. The tank is transported to the location where the solids are to be removed from the tank.

Abstract: A dialysis system which does not need to use a physiological saline in replenishing a solution or cleaning and priming the dialysis system, does not need a troublesome setting operation and can easily and accurately set a flow rate of a replenisher solution. The dialysis system includes a closed type water-removal control apparatus 1, a dialyzer 2, a fresh dialysate line 3 as well as a used dialysate line 4, a dialysate pressurizing line 5, a dialysate pressurizing pump 51 provided in the dialysate pressurizing line 5, an artery side blood line 6, a blood pump 61 provided in the artery side blood line 6 and a vein side blood line 7. According to the dialysis system, by pressurizing a dialysate into a communication line of the dialysate, the dialysate is made to flow from a dialysate flow path 21 into a blood flow path 22 through a dialysis membrane 23 of the dialyzer 2 and the inside of a blood circulation path can be cleaned and primed.

Abstract: A dialysis system which does not need to use a physiological saline in replenishing a solution or cleaning and priming the dialysis system, does not need a troublesome setting operation and can easily and accurately set a flow rate of a replenisher solution. The dialysis system includes a closed-type water-removal control apparatus 1, a dialyzer 2, a fresh dialysate line 3 as well as a used dialysate line 4, an RO water pressurizing line 5, an RO water pressurizing pump 51 provided in the RO water pressurizing line 5, an artery side blood line 6, a blood pump 61 provided at the artery side blood line 6 and a vein side blood line 7. According to the dialysis system, by pressurizing RO water into a communication line of the used dialysate, dialysate is made to flow from a dialysate flow path 21 into a blood flow path 22 through a dialysis membrane 23 of the dialyzer 2 and the inside of a blood circulation path can be cleaned and primed.

Abstract: A water filtration assembly (10) includes a first end cap (34) covering the first end of a housing (12) and a second end cap (36) covering the second end of the housing (12). The end surface (40) of each end cap (34 and 36) has a L-shaped cap recess therein with an axial leg (42) and a transverse leg (44) extending about the end face. A projection (30) at the first end of the housing (12) is disposed in engagement with the cap recess of the first end cap (34) as the end surface (40) of the first end cap (34) abuts the recess end surface (28) at the first end of the housing (12). In the same fashion, a projection (30) at the second end of the housing (12) is disposed in engagement with the cap recess of the second cap (36) as the end surface (40) of the second cap (36) abuts the recess end surface (28) at the second end of the housing (12). The end caps (34 and 36) are formed with a two sided shoulder (46) filling the corner between the axial (42) and transverse (44) legs of the cap recess.

Abstract: A new separator for an alkaline cell is provided, which can prevent deformation to an end of the separator and also prevent short circuits within the cell structure when an external force is added to the cell. The separator has a characteristic that a ratio of a tensile strength of a longitudinal direction of a separator base paper and a tensile strength of a widthwise direction of the base paper is within a range of 2/1 to 1/1. The invention provides a new method of producing the separator. The method permits reliability in sealing properties of a closed bottom end and high productivity. The method has the steps of: winding the base paper to form a cylindrical body; subjecting the cylindrical body to a closed bottom forming step while the cylindrical body is held by a clamping device to maintain its cylindrical shape; heat-bonding an end of the cylindrical body to close the end; and releasing the cylindrical body from the cylindrical clamping device.

Abstract: A mixing and kneading device comprises a mixing and kneading shaft mounted in a housing and driven to a rotating as well as to a reciprocating movement. For sealing the housing, there is provided a sealing assembly located between the housing and the mixing and kneading shaft. The sealing assembly includes a supporting assembly arranged between the housing and the mixing and kneading shaft and provided with first and second sealing means. The supporting assembly is locked against rotation, but coupled to the mixing and kneading shaft to perform therewith its reciprocating movement. The first sealing means serves for rotatively seal the mixing and kneading shaft and is located between the mixing and kneading shaft and the supporting assembly. The second sealing means provides for a translative sealing of the mixing and kneading shaft and is located between the supporting assembly and the housing.

Abstract: A filter is provided for filtering contaminants from a fluid passing through the filter. The filter comprises a silicon substrate having opposing first and second surfaces and a passage extending through it. A first etch resistant material layer is formed on the first substrate surface and includes at least one opening which extends through the first layer and communicates with the substrate passage. A second etch resistant material layer is formed on the second substrate surface and includes a plurality of pores which extend through the second layer and communicate with the substrate passage. The second layer defines a filter layer which filters contaminants from fluid passing through the second layer. A process for forming the filter is also provided.

Abstract: A method of filtering a bath (1,31) having a liquid containing particles of varying sizes therein and the recirculation and filtering system. The method and system require providing a recirculation route from the bath outflow and returning to the bath inflow. The route includes a first path communicating with the bath outflow and having serially a first controllable valve (5,9) and a filter having a relatively large pore size. The route also includes a second path communicating with the bath outflow and having serially a second controllable valve (11,15) and a filter having a relatively small pore size. There is a return path from each filter to the bath inflow. The return path from each filter can be a separate path or the paths can be connected at the output end before returning to the bath.

Abstract: An evaporator comprises a base with a vacuum connection. A tray is fixed to the base, and has seating positions in which to seat pans which hold sample liquid. A transparent cover is attached to the base with a hinge. The cover fits over the tray and when closed forms a tight fit with the base and is in close proximity to the pans. The cover has inlets angled down at about 37° to 42° over each pan seating position such that when a vacuum source is connected to the vacuum connection, air from outside the evaporator is drawn in through the inlets and aimed toward the sample liquid in each pan such that the solvent evaporates. Pans are preferably commercially available pans which are about 70 mm in diameter and about 16 mm in height, and tapered outwardly towards the top. Preferably, the cover has two inlets for each pan, aimed in opposite directions, and on opposite sides of each pan, such that when air strikes the sample liquid it induces a swirling motion.

Abstract: A filter media system, which is capable of operating in the microfiltration regime, offers: low cost, durability, high temperature and chemical resistance, no particulation, mechanical strength, separation efficiency, and biocompatibility. A filter media system is comprised of a carbon or ceramic composite substrate which contains a carbon or ceramic matrix reinforced with carbon or ceramic fibers. The composite has an array of carbon or ceramic fiber whiskers grown onto its surface or in its bulk. A process is provided for manufacturing the filter media system wherein a carbon fiber is disposed in a matrix deposited by a CVI or LPI process, at temperatures of about 900 to about 1200° C. to achieve a weight gain of about 10 to 200% (the ceramic matrix is deposited by a CVI process from an aqueous slurry or by use of a preceramic polymer). This composite is treated with an aqueous solution of metal catalyst salt and is then heated in hydrogen at elevated temperatures to reduce the metal salt to metal.

Abstract: The invention relates to a hollow membrane (11) comprising two support layers arranged one above the other forming a space between them and a plurality of capillary tubes arranged between the support layers forming capillary channels for the flow of a first fluid, the space between the capillary tubes forming an internal cavity for the circulation of a second fluid around the capillary tubes, and the whole assembly being made of an organic polymer. These membranes (11) can be assembled into modules for the treatment of a fluid with intermediate porous panels (13).

Abstract: The invention relates to a filtering apparatus for removing matter and bodies accompanying a liquid flow. The filtering apparatus includes a number of individual filter elements disposed to be displaced in an endless path. The endless path is formed by one or more arcs in relation to which the filter elements are displaceable. A drive is provided for displacing one filter element at a time past a scraper device for removal of matter accumulated against the filter element.

Abstract: An apparatus for purifying, by membrane separation, a fluid in a membrane module 1 of pressurized aid purifiers. The fluid is brought to flow through a filtering unit 11 of the membrane module 1. The flow is circulated for efficiency. This recirculation of the fluid takes place within the filtering unit 11. The direction of flow of the fluid through a first flow segment 12 of the filtering unit 11 is opposite the direction of flow of the fluid through a second flow segment 13 of the filtering unit 11.

Abstract: A self-regenerating filter unit having a housing which carries an ultrasonic transducer periodically energizable to dislodge caked solids from a filter element in the housing. The removed solids collect in a storage zone where they are periodically removed.

Abstract: A strainer device for use in straining a liquid such as paint from a container into an open receptacle. The strainer device comprises a side wall with a top end and a bottom end, an outwardly extending lip at its top end for engaging the top end of an open top container so as to support the strainer device in the open top of the container, and a screen mesh member fixed to a flange on the bottom end of said side wall. A selected portion of the side wall is indented from top to bottom so as to provide a channel along its length to permit introduction of an intake hose or other implement to a container in which the strainer device is suspended without having to first remove the strainer from the container.