Abstract: A unitary injection molded filter is disclosed which includes a rigid frame of resin material to provide a rigid shape to the filter, and at least one screen of non-woven sheet resin material suspended on the frame and having formed therethrough a plurality of holes extending between the opposed side surfaces of the screen so as to form fluid passages therethrough. Each screen is integrally molded simultaneously with the frame.

Abstract: A fluid treatment element comprises a wrap spirally wound in successive overlapping windings about the external surface of a cartridge. The wrap has a portion contiguous to a portion of the external surface of the cartridge. A first adhesive is disposed between the external surface of the cartridge and the contiguous portion of the wrap. A second adhesive is disposed between overlapping windings of the wrap. An end cap is disposed over an end of the cartridge and is secured to the end of the cartridge and an end portion of the wrap. The fluid treatment element is applicable to various fields, including, for example, filtration, water demineralization, and gas treatment.

Abstract: A device (10) for filtering and directing effluent to one of a plurality of angularly spaced drainfield trenches. The device (10) includes a housing (12) in which a core (14) is received. A filter medium (18) is inserted within the core (14) and extends around an inside of the core (14). Effluent channelled into the core (14) passes outwardly therefrom through a port (52) formed therein. This port is in registration with one of a plurality of ports (54) formed in the housing (12). Selective registration is accomplished by rotating the core (14) relative to the housing (12).

Abstract: A water supply station is provided with series connected reservoirs for receiving and storing potable water or the like under different temperature conditions. The station includes a first reservoir for receiving an incoming water flow, and a second reservoir coupled to the first reservoir via an overflow conduit. When the first reservoir reaches a substantially filled condition, additional water flow spills through the overflow conduit for passage into the second reservoir. The water within the two reservoirs is maintained under different conditions, such as at selected cold and hot temperatures, respectively, ready for immediate dispensing through appropriate dispensing valves. The water supply station is particularly adapted for use as a countertop unit wherein the reservoirs respectively store water for immediate dispensing and use, for example, in cold or hot beverages.

Abstract: The disclosure describes a filter assembly comprising a manifold, a filter housing, a hollow, generally cylindrical filter element disposed within the filter housing, and a mounting ring operatively associated with the manifold and the filter housing for detachably mounting the filter housing to the manifold. The manifold includes first and second ports. The filter housing includes a side wall and an end wall having first and second spaced openings and a bore. The filter element is spaced from the side wall of the filter housing and includes and end cap. The end cap is disposed in the bore of the end wall of the filter housing and has an opening which communicates with the interior of the hollow filter element.

Abstract: A filter cartridge comprising a framework and a surrounding envelope of filter material. The framework is reusable and provided with a rough, granular surface texture to provide increase surface area available for the propagation of aerobic bacteria. The envelope is disposable. Thus, biological filtration of the water provided by the aerobic bacteria is not interrupted upon replacement of the filter material. A second filter medium may be disposed within the envelope. The envelope is held in place by a pair of flaps which sandwich an edge of the filter material.

Abstract: A flexible filter bag, the filter element of which is seamless and avoids prior leakage problems, is made by wrapping a flexible, preferably perforated, filtering fabric and a flexible nonfiltering transport material together onto a cylindrical mandrel to provide a tube. A thin metal ring is fitted into the tube, and the portion of the filtering fabric which extends beyond the edge of the transport material is folded inwardly around the ring to provide a cuff. A sleeve of a length about twice that of the tube is inserted into and pulled over the tube until the free ends of the sleeve are approximately coterminous with the ring-free end of the tube. The free ends of the sleeve and tube are gathered in the manner of a sausage casing and then subjected to pressure to form a seal, but the convolutions of the transport material terminate just short of the seal so as to avoid bunching at the seal.

Abstract: A filtering device includes a head intended to be permanently installed in a fluid dispensing machine and a disposable canister therefor. A central chamber is formed in the head which chamber is in communication with an inlet port and an outlet port for receiving an unfiltered liquid and supplying a filtered liquid, respectively. The disposable canister has a flask shaped main body with a flat top and a neck of substantially uniform diameter on the top. The neck fits in the central chamber. A tube extending through the neck defines an annular clearance between the tube and the interior of the neck which annular clearance is in fluid communication with the inlet port. The opening into the tube located at the top of the neck is in fluid communication with the outlet port in the head. A pair of tab receptacles on the head and a complementary pair of tabs on the canister are engageable with one another by 1/4 rotation of the canister to lock the canister to the head.

Abstract: A liquid filter cartridge includes a centertube and a filtering media wrapped circumferentially about the centertube to provide a spirally wrapped media. The media includes a surface-type filtering medium having a predetermined porosity and a depth-type filtering medium which is disposed between the wraps of the surface-type filtering medium. The surface-type filtering medium is a filtering paper, and the depth-type filtering medium is an air laid batt which includes structural fibers tending to support the surface-type medium and to prevent the latter from collapsing under dynamic flow conditions. The depth-type medium is porous and offers little resistance to fluid flow, so that the liquid to be filtered can easily flow both radially from one of the layers of the surface-type medium to the adjacent layer, and also can flow circumferentially to thereby permit access for the liquid to be filtered over the entire area of the inner wraps of the surface-type medium.

Abstract: A plate-type filter cartridge includes a plurality of stacked filtration units; each filtration unit having inner and outer rims, two filtration membranes bonded to opposite sides of the two rims, and a pair of netty members formed of fibrous material contacting a porous support and membranes. The support supports the membrane and is disposed between the membranes; the support being defined by a plurality of spokes and an outer rim.

Abstract: Gyratory and reciprocal motion classifiers for classifying particles in a fluidized particle bed according to size or density, and implementing a classification chamber for the fluidized particle bed and an activation chamber for enhancing the kinetic energy of particles prior to their introduction into the classification chamber. The activation chamber is movable with the classifier and preferably has a vertical thrusting surface and lateral surfaces convergent toward an exit opening which admits particles into the classification chamber in proximity to an upstanding surface for dispersing particles away from the point of entry and over and into the fluidized bed in a direction counter to the directional throw of the particle bed-supporting surface of the classification chamber.

Abstract: A disposable filter unit (1) comprises a two-part fluid-tight and pressure-resistant housing with funnel-shaped inlet and outlet connecting sleeves (3,20). Two filter supports (5,12) are fixed in a fluid-tight and form-locking manner within the housing, and the filter element fixed between the supports. The filter supports (5,12) are essentially circular grate-shaped plates including concentrically arranged coplanar circular webs (16) defining concentrically arranged circular gaps (19) therebetween and a centrally arranged baffle plate (17). The webs and plate are fixed at their back side, facing away from the filter element, with radially extending support webs (18).

Abstract: A filter arrangement is suggested where the filter means (38) is placed between distance pieces (48, 50, 52). In order that the longitudinal edges (64, 66, 68) of the preferably zigzag-folded distance pieces cannot cause any damage to the filter means, they are provided with a substantially edgeless cap (90, 92, 94), of which the maximum width equals that of the distance pieces.

Abstract: A filter unit using a bump-type filter is disclosed. Briefly stated, a chamber has a split fluid inlet conduit so that contaminated fluid, upon entering the chamber, is directed upwardly towards filter tubes and downwardly towards the bottom of the chamber. The fluid flow is diverted during startup so as to be directed only downward thereby enabling precoat of the filter element. Two tube sheets are utilized with incoming fluid in the vertically upward inlet conduit forcing incoming contaminated fluid to be deposited between the two tube sheets thereby. During operation contaminated fluid flows upwardly and downwardly towards the filter tubes so as to prevent disturbance of filter tubes as a result of turbulence in the chamber.

Abstract: A filter assembly including a base for supporting and providing fluid connection to a removable filter cartridge, the base having a hollow connecting end for mating with the cartridge, a removable filter cartridge comprising a filter medium and having a connecting end shape to mate coaxially with the end of the base in a rotatable, telescopic relationship, the connecting end of one of the base and the cartridge having lug means extending radially toward the end of the other, the other connecting end having corresponding passage means for lockably receiving the lug means, the telescopically related mating ends of the base and cartridge providing radially opposed surfaces of circular cross-section about the mutual axis of the connecting ends of the base and cartridge, and a circular elastomeric sealing ring providing a radial seal between the circular cross-section surfaces, preventing liquid flow past it between the telescopic ends.

Abstract: A filter cartridge for removing particles of the order of submicrons from a solution, comprising at least two filtering films laid in parallel with the inner peripheral portions bonded fixedly to an inner rim of the core and with the outer peripheral portions joined together, thus defining a path of a solution to be filtered, and providing a relatively large effective filtering area.

Abstract: An axial oil filter including at least one pair of axially aligned filter elements includes an elongate filter body and a removable filter cartridge. The filter elements are mounted on an axial conduit which is a part of the filter cartridge, and the filter cartridge placed in the filter body so as to define upper and lower chambers, and a bypass flow path between the upper and lower chambers. Fluid to be filtered may flow into either of the chambers and will flow upward through the lower filter element and downward through the upper filter element. The filtered fluid is collected from a passage defined by a screen between the two filter elements, and passes outward from the filter through the outlet port.

Abstract: A filter apparatus comprises a housing having a liquid entrance, a liquid exit, and two tubes protruding from a wall of the housing into an inner space of the housing. The tubes have openings which face each other and have at least one perforation or side opening on their walls, one of the liquid entrance and the liquid exit being connected to one of the tubes. The detachable filter cartridge comprises an outer perforated cylinder, an inner non-perforated cylinder, the outer cylinder being connected to the inner cylinder in coaxial relationship such that a respective end space for receiving a liquid is formed inside each end of the outer cylinder. A bundle of porous hollow fibers is connected between the outer cylinder and the inner cylinder such that openings at both opposite ends of the hollow fibers open to allow passage of liquid from one end space for receiving liquid to another end space via the hollow fibers.

Abstract: A device for mechanically purifying liquids in a pipeline includes a rotation-symmetrical sieve chamber forming a section of the pipeline and having an inlet with a central axis, a rotation-symmetrical sieve body having an inner surface and being disposed in the sieve chamber at an angle of substantially 30.degree. to 60.degree. relative to the central axis of the inlet, and a suction removal device for removing deposits from part of the inner surface of the sieve body, the suction removal device being coaxial with and upstream of the sieve body in flow direction of the liquid, and the sieve body and the suction removal device being rotatable relative to each other for successively sweeping all of the inner surface of the sieve body with the suction removal device.

Abstract: A device for brewing a beverage into container, such as a cup, which includes an enclosure adapted to fit over the rim of a receiver such as a cup with a space between the bottom of the device and the receiver and where a reservoir is provided to receive granular or particulate material to be used in the brewing process. A removeable water apertured distributor plate is provided to be located above the reservoir with foot members provided to generally center the apertured plate and to provide an annular space around a part of the plate between the edge of the plate and the chamber defined by the enclosure. A filter is provided in the bottom of the reservoir to prevent loss of the particulate material which is being extracted into the receptical.