Abstract: A tandem pump equipped with a pair of pump units that are assembled together each having a water inlet and a water outlet. Each water outlet duct is associated with a control chamber which is equipped with a volume control disc which can be operated with click sound. Each water outlet duct is provided an air intake tube with which flexible pipe can be engaged so that air or different kinds of gas can be introduced into water of a fish globe along with the projected water. The pump umits of the tandem pump are in communication with each other so that water can be controllably dispensed via a single water outlet or both water outlets at variable speed or volume. Different kinds of accessories for fish raising can be selectively mounted to both or either of the pump units so as to make the tandem pump to be more effectively employed.

Abstract: A multi-stage fluid filter filters entrained particulate matter from a moving fluid stream at substantially constant fluid pressure and filtration efficiency during continuous on-line operation. The filter includes a housing having a fluid inlet and a fluid outlet, first and second stationary filtration elements positioned in the housing, each having a filtration medium therein from an upstream side to a downstream side thereof. The two elements are positioned in series for fluid flow from the downstream side of one of the two elements defined as a first filter stage for accumulating particulate matter on the filtration medium thereof to the upstream side of the other of the two elements defined as a second filter stage having a previously accumulated layer of particulate matter on the filtration medium thereof.

Abstract: An improved filtering device for aquarium tanks and artificial ponds mainly comprises a water injector which is made up of a top cover plate and a water injector base, a multi-layered filtering member and an external shield cup which is used to contain the filtering member with appropriate space wherein the edge of the top cover plate is made to be a thick edge which has an annular slot for an "O" shaped seal washer to be placed on. When the top cover plate and the external shield cup are put together, the thick edge is covered up inside the external shield cup, allowing the "O" shaped seal washer to seal off the internal rim of the external shield cup.

Abstract: An apparatus including valving structure to direct in a circular swimming pool a first conduit to effect a circular stream within the swimming pool, with a second conduit directed to a basket, and the second conduit having a nozzle directing fluid flow into the basket in association with the first conduit to direct debris from the swimming pool into the basket structure.

Abstract: A liquid filter includes an annular filter cartridge and a combination anti-drain back and relief valve assembly. The combination valve includes a valve seat from which axially extending arms extend and a spring retainer and spring which holds a gasket against the valve seat. The gasket includes an anti-drainback portion which projects from the valve seat and a relief valve portion which is supported on the valve seat. Upon assembly the combination valve and filter element in the housing, the filter assembly is supported by the spring retainer and is forced into sealing engagement with the gasket, holding the latter against the valve seat in a gasket engaging area between the relief valve portion and the anti-drainback portion. This assembly process also removes the coil spring load from the barbs on the valve seat arms.

Abstract: The invention concerns a backwashable filter device, specially for domestic water conduits that includes an inlet for raw water, a raw water chamber connected to the inlet, an outlet for clean water, a clean water chamber connected to the outlet, a filter element and an outlet for backwash water. The filter element is arranged between the raw water chamber and the clean water chamber and features a partial area (B) that accommodates water flow only in backwash but not normal operation. A conduit channel connects the outlet for backwash water with the partial area (B). At least one separate conduit connection is provided from the clean water chamber to the partial area (B). A conduit area is present in the conduit connection and designed in a nozzle-like shape so that clean water can be conducted from the clean water chamber at increased velocity against the partial area (B).

Abstract: A flow control device for use in connection with a fluid separation system of the type having a pressure feed, a fluid separation portion and a flow control passage in which the flow control device includes a fixed orifice plate with one or more orifices, a movable orifice plate with one or more orifices which are adjustably and selectively movable for alignment with the orifices in the fixed plate. The flow control device also includes a mechanism for providing adjustment movement of the movable orifice. A further aspect of the present invention is the incorporation of the flow control mechanism into a fluid separation system.

Abstract: A pour-through pitcher filter assembly includes a compact filter element including a thin annular disk of molded activated carbon and a peripheral annular seal element. The seal element allows the filter to be replaceably mounted in the lower end of a plastic reservoir, which reservoir is adapted to be supported in the top of a pitcher for receiving filtered water. The reservoir may be made by a blow molding process and includes an integral bellows member which is manually collapsible to pressurize the interior of the reservoir to initiate gravity flow through an initially dry filter element. The seal element utilizes a synthetic rubber material and is preferably insert molded around the carbon filter disk.

Abstract: A bypass orifice and filter for use in the diaphragm of a toilet room flush valve includes an orifice member adapted to be mounted in the flush valve diaphragm, and a filter element attached to the upstream side of the orifice member. The orifice member has a metering restriction to limit the flow of water therethrough and the filter element has a plurality of openings therein in communication with the orifice member metering restriction. The smallest dimension of the openings in the filter element are less than the smallest dimension of the metering restriction so that any particle in the water passing through the filter element will pass through the metering orifice. In some embodiments the orifice member and filter element are an integral unit.

Abstract: The present invention is an automatic filter cleaning system which includes a solvent dewaxing filter which removes wax from a wax mix slurry and provides a filtrate. Status control apparatus is connected to the filter for affecting the operational status of the filter. Drain apparatus responsive to a control signal controls draining of the filter. Cleaning apparatus is also connected to the filter. A control network connected to the status apparatus, the draining apparatus and the cleaning apparatus controls those apparatus in a manner so as to allow selective changing of the status of the filter from an operational state to a down state to automatically drain the filter and clean the filter while the filter is in the down state.

Abstract: An apparatus for isolating an underground piping system from dispensers having a filter assembly. The isolation apparatus includes a seal member and a securing member which replace an in-line filter assembly. The seal member has a similar cross-sectional shape of the filter with a pair of inner and outer seals. The securing member is receivable on a nipple adapter that the filter assembly was received on and abuts the back portion of the seal member to engage the seals against an outlet conduit of the underground piping system.

Abstract: A vibrating sieving unit for insertion into a housing to form a sieving filter. The vibrator directly vibrates the sieving cylinder reducing the buildup of filter cake for improved performance. A unique cleaning-in-place system is presented utilizing the fluid being filtered as the purging liquid. An alternate purge construction is also provided for use if the first purge route is blocked.

Abstract: The present invention offers a piping system for supplying ultra-pure water, which comprises a circulation tank to store primary pure water from a primary pure water producing unit, a pump for sending the primary pure water from said circulation tank, an outward pipe, one end of which is connected to a final purifying unit to purify primary pure water from said pump to ultra-pure water, a plurality of connection pipes, each end of which is connected to the other end of said outward pipe, a branching pipe connected between the middle of said connection pipe and the ultra-pure water using unit and having a branching valve to adjust the water quantity, and a return pipe connected between the other end of said connection pipe and said circulation tank, characterized in that means for controlling the output of said pump is provided to keep the water pressure at constant level by detecting the water pressure in said outward pipe, thereby supplying a constant quantity of ultra-pure water to the ultra-pure water usin

Abstract: A system for providing filtered well water to a building includes a filter, an accumulator downstream of the filter, and an automatic backwash valve between the filter and the well. When the well pump is deactivated, the accumulator discharges its contents back through the filter, towards the valve, which contains a shuttle that automatically diverts the backwash water to a drain line. The valve also prevents contaminants from being siphoned into the system through the drain line.

Abstract: A multi-functional valve includes a body and a circular piston. The piston has at least one circular O-ring surrounding the piston body. There is also a side mounted O-ring with a central axis substantially perpendicular to the circular O-ring.

Abstract: Apparatus for quickly taking and filtering liquid taken from a body of liquid comprises a bailer for taking and containing a sample of the liquid therein. The bailer has an upper end portion adapted for quickly disconnecting and connecting a liquid pressurizing device including a hand operated fluid pump or regulated tank of compressed gas. A lower end portion of the bailer is provided with a ball or poppet check valve controlling the flow of liquid to and from the bailer by way of an internal opening adapted for quickly connecting and disconnecting a filtering unit to and from the bailer. The filtering unit has a disposable filter element inside of a housing attached to an upper adapter with a liquid passage therein quickly inserted into sealing engagement with the internal opening of the bailer and which opens the ball check valve. A lower end of the filter housing is connected by another adapter into which a flow control valve is quickly connected to and disconnectable from.

Abstract: A filter arrangement (26) for a fuel system (10) having a cartridge (92) located in a bore (48) of a housing (42) for sequentially interruption flow communication from the bore (48) to a regulator (14) through an outlet port (44) and to the bore (48) through an inlet port (46) from a source (16) of fuel prior to the removal of the cartridge (94) from a housing (42). The housing (42) has a vent port (52) and a drain port (54) which are opened to allow fuel in the bore (48) to flow to a storage container (56) once the outlet (44) and inlet (46) ports are closed so that fuel is not lost from the fuel system (10) on the removal of the cartridge (94) from the bore (48).

Abstract: A novel drinking water faucet of the type used with household water purification system is provided. The faucet includes a spout, a valve, means for opening and closing said valve, a waste water inlet, an air gap, and a waste water outlet. The faucet includes means for accommodating the visual display of a water quality meter. The faucet can be mounted in either a right-handed or left-handed configuration from above the mounting surface.

Abstract: A multi-functional valve has a combined safety, bypass, shut-off and inservice capability. The multi-functional valve is modified to attach directly to the cylinder of an exchange unit of water treatment. This multi-functional valve has a base member and a head portion. The base member fits onto the exchange cylinder. The head portion of the multi-functional valve includes a water receiving section capable of being tapped directly into the waterline. Mounted to the head section is a lever arm to move the valve to the desired position.

Abstract: An in-line water purification system where all the water from a supply to a faucet opening enters a filter cartridge further includes a flow restrictor placed at the end of a faucet and which can be placed in a position so as to reduce water volume through said filtering system to remove the subjective control by the end user of water flow through the filtering device.

Abstract: A water purifier includes a canister containing a reverse osmosis filter unit and threadedly engaged with a control head which is adapted to be coupled to a source of tap water, to a purified water storage tank, to a faucet or other remote usage location and to a waste water drain. The head includes a normally-open inlet valve controlling the flow of tap water to the filter unit and a drain valve controlling flow of waste water to the drain. The inlet valve closes in response to back pressure in the storage tank when it is filled to shut off the apparatus. A normally-closed and normally-disabled bypass valve can be selectively enabled for opening in response to a predetermined lower back pressure in the storage tank when it is less than completely full for diverting purified water from the filter unit to the drain. The drain valve is continuously adjustable between fully open and fully closed conditions.

Abstract: A filter for liquids is disclosed, which has a base with a central inlet, and an outlet, a central post with a filtering element surrounding and sealing therewith, a cannister enclosing the element and releasably sealed to the base, a passageway in the post, which is sealed to the inlet, and which has means to permit upward flow but inhibit downward flow or drip. This retains the liquid in the cannister and element when drawn upwardly, to prevent drip or spillage, or when lowered to provide a full prime. A method of removing the filtering element without drip, and a method of installing a primed element are also disclosed.

Abstract: A valve housing encloses an upward valve seat connected to the water inlet. A valve chamber above the seat receives a valve element and has a lateral bypass chamber connected to a fitting which leads to the filter. A tubular valve stem/outlet spout above the valve element is spring-pressed downward, normally holding the valve element down on the seat and may be raised by a handle allowing the valve element to raise to permit water to flow through the bypass to the filter. Filter discharge water is connected to a bypass return fitting on the valve housing which conducts water to a chamber surrounding lower part of the stem and into the stem through a radial opening and up and out the spout.

Abstract: An assembly for the removal and examination of amnioytes in early pregnancy by filtering the amniotic fluid and returning the fluid to the fetus subsequent to filtering wherein a conduit structure has a filter incorporated therein and is constructed to include two different paths of fluid flow, one for drawing off said amniotic fluid through the filter means and one for returning the amniotic fluid subsequent to filtering along a path which bypasses said filter structure.

Abstract: A precoat filter element for a precoat filter unit comprises a flow distributor and flow straightener. The flow distributor surrounds a filter septum and has openings through which liquid may flow. The proportion between the area of openings and the area of a wall of the flow distributor may vary along the length of the septum to distribute flow over the length of the filter septum in a predetermined manner. A flow straightener is provided at the base of the septum to reduce turbulence during precoat and filtration operations, and to reduce the occurrence of large flocs in precoat slurries during coating operations.

Abstract: A faucet includes a body and first and second independent liquid conduit systems passing through the body, for handling first and second liquids, which may be respectively pure water from a water purification system and waste water (brine) generated by reverse osmosis in the purification system. The first conduit system has lower, upper and intermediate tubular portions, the latter providing a passage between the lower and upper portions. A handle is movable between a position in which the passage is closed and a position in which the passage is open. The second conduit system is a tube which is always open and which has a liquid inlet and a liquid outlet end, the liquid inlet end being connectible to the waste water (brine) line and the liquid, with the liquid outlet end spaced above and providing a gap with the maximum level of liquid in a sink.

Abstract: The filter device comprises a filter chamber, a water supply chamber associated with the filter chamber and an aspiration tube, having a first and inserted in the water supply chamber and a second end which is immersable in an aquarium. The device also comprises a centrifugal pump adapted for feeding water to the filter chamber, and an impeller housed in an impeller chamber having an aspiration port, whereon the first end of the aspiration tube is selectively positionable. The impeller is associated with a permanent magnet rotor contained in a watertight cylindrical body, externally embraced by a cluster of stator windings. The filter chamber has a water outlet and houses a container adapted for accommodating filter elements.

Abstract: A fluid metering device (10) is provided for automatically restricting (i.e., shutting off or reducing) fluid flow to a filter (16). The metering device (10) has a vane (32) which turns as fluid flows and thereby drives a gear (92). Once the vane (32) has rotated a selected number of times, as a result of the fluid flow, the rotation of the gear will break a frangible link (82), causing the fluid flow to stop or reduce by closing a valve (60). The customer will know to replace the filter (16) when the fluid no longer flows or is substantially reduced, and the customer will also have to replace the frangible link (82) to enable the fluid to flow at full volume again.

Abstract: A coating of tetrafluoroethylene or other suitable material is present in the heating element of a bypass oil refining device for the purpose of substantially preventing deposit of carbon or carbonaceous material on the heating element during operation of the device. The heating element is located in a vaporization chamber. The bypass oil refining device incorporates a pressure control valve to shut off flow of oil from a mechanical filter to the vaporization chamber when the oil pressure in the mechanical filter exceeds a predetermined value. An externally adjustable flow control valve is also incorporated in the device to permit control of the rate of flow of the oil from the mechanical filter to the vaporization chamber. Water and fuel vapors which are distilled out of the oil in the vaporization chamber are released from the vaporization chamber through a vent and check valve, and are absorbed as condensates in a suitable, absorbent material. The absorbent is preferably placed into a disposable cartridge.

Abstract: A separator with a magnetic drum which rotates through a well-defined liquid flow path to separate magnetic particles from liquid delivered to the flow path by way of a trough. A weir extends between the trough and the drum to define a gap at the entry end of the flow path. The weir is hinged to swing downwardly and upwardly to automatically increase and decrease the width of the gap when the incoming flow rate increases and decreases, respectively, the weir thus acting to maintain the liquid level in the trough substantially constant at various incoming flow rates. The trough is shaped to spread the incoming liquid across the length of the drum in a streamlined manner. The housing of the separator is of a fabricated construction enabling easy removal and replacement of an arcuate apron which coacts with the drum and the housing to define the flow path.

Abstract: An apparatus is provided for reacting a solution of a precipitating medium of alkaline metal chlorides at a fixed rate of delivery with plasma continuously separated from blood, filtering the precipitate formed by the reaction, removing the solution of precipitating medium from the plasma following the use of the medium, adjusting the purified treated plasma, and returning the purified plasma to the blood in an amount equivalent to that of the continuously separated plasma. To enhance the precipitative separating action of alkaline metal chloride on plasma protein without detracting from the advantages of the alkaline metal chloride, use is made of a solution of precipitating medium comprising a mixture of the alkaline metal chloride and an amino acid, the latter being added in an amount sufficient to promote the precipitating effect of the alkaline metal chloride.

Abstract: An in-line accessory faucet having a separable plastic air-gap module for use with a reverse osmosis unit, the faucet being installable without the module when used without a reverse osmosis unit. The air-gap module slides onto the faucet pipe conduit below the housing, and has brine flow passages and a channel formed in the top surface and closed off by the overlying flat surface of a base member between the housing and air-gap module. A valve seat in the housing connects to both the housing and the pipe conduit. The valving in the housing has an in-line configuration, with the faucet inlet and outlet being on a common central axis. A mounting nut with an expandable - collapsible portion and peripheral side channels for brine tubes permits mounting of the faucet solely from above the sink lip. A handle with two lower camming surfaces is operated only downwardly to obtain both pressure - controlled flow or locked-on flow.

Abstract: A dirt filter for thermoplastic media has a barrier member within a filter chamber which, in case of an axially symmetrical arrangement with respect to the flow axis, has the basic shape of a double cone. The barrier member defines a barrier gap for the flowing media within the filter chamber. The barrier gap can be widened to a cleaning gap as a result of a displacement of the barrier member. An adjusting member, can be provided which includes an adjusting element, which is mounted in a reception member so as to rotate around its longitudinal axis. The rear end of the adjusting member can be constructed with hexagon wrench faces, which are accessible from the outside of the housing.

Abstract: A filter press for the thickening of cellulose pulp or sludge in which the filter press is furnished with a feedbox to lead the sludge suspension to the wire. In order to increase the capacity of filter presses or the like, the sludge to be dried can be fed through a feedbox in accordance with the invention, in which box there is at least one surface penetrating the liquid to facilitate thickening of the sludge suspension before it is lead to the filter press wire.

Abstract: A filter device for a screw extruder for the handling of molten plastic comprising a filter housing having inlet and outlet bores and a slide displaceable in the housing transverse to the direction of the flow of the melt. At least one recess in the slide forms a portion of a melt channel and receives a screen member. In order to obtain uniform distribution of the flow of melt in the filter device and of the pressure forces acting on the filter surface, the recess is formed by an annular milling which is surrounded by a replaceable cylindrical screen member. A flow passage in the slide extends from the melt channel to the outlet bore.

Abstract: An improved valve-strainer body or housing is disclosed wherein a single structure is adapted for use as both a valve housing for globe valves, gate valves, check valves and the like, and also utilized as a casing for a strainer. The housing is sized such that the single housing may be utilized in differing sized pipeline systems from approximately 1/4 inch IPS to 1 inch IPS. The invention also discloses superior means of using the valve body casing in connection with not only threaded pipe systems, but also brazed pipe systems and welded pipe systems. Finally, improvements in the valve assembly structure is also disclosed.

Abstract: A filter including a flexible plastic mesh having feathers adhesively attached thereto on opposite sides thereof is disclosed for separating out oil from an oily liquid. The filter comprises an oil sorption element of a filtering device which houses the filter. A filtering system comprises a plurality of interconnected filtering devices which may be arranged in parallel or in series with each other. Control valves are provided for controlling the flow of the oily liquid to the filtering devices. A filter assembly, including a plurality of filters supported by a movable conveyor in spaced relationship, is also disclosed.

Abstract: A separating device for removing water from a fuel oil/water mixture includes a cartridge comprising a filtering media and a sump. The cartridge is installed on a mounting head, which includes a pump and a pair of check valves to permit fluid to be drained from the sump by operation of the pump. A bypass passage permits fluid to bypass the check valves during normal operation of the device, but a plunger closes the bypass passage to permit operation of the pump to move fluid through the device.

Abstract: An air gap drain module for use with the dispensing head of a reverse osmosis dispensing system for potable water has an inner waste water tube and an outer drain tube which are disposed concentric to each other at one end and for a portion of the length of the inner tube adjacent the concentric end. An air gap in the form of spaced slots is provided adjacent the concentric end of the drain tube and a closure is connected to the common end of the waste water tube and drain tube with an annular flange or skirt thereon in assembled position disposed to extend between the waste water tube and the drain tube to form an annular passage about the waste water tube and direct the movement of process water issuing from the concentric end of the waste water tube into the drain tube. The closure forms a chamber or trap with the adjacent end of the waste water tube which in conjunction with the spaced slots prevent back flow into the waste water tube.

Abstract: A filter for liquids, particularly drinking water comprises a housing with an inlet connected in the housing and an outlet connected out of the housing with a filter chamber in the housing having a filter material therein. The filter chamber has a connection to the inlet and to the outlet and in addition there is a direct passage which has a connection to both the inlet and the outlet. A settable control is associated with the housing and in one position it permits flow through the filter chamber and then to the outlet and in another position it permits direct flow from the inlet of the housing to the direct passage to the outlet. The settable control is associated with an indicator which is set with the control for the flow through the filter to provide an indication such as an optical or a sonic indication.

Abstract: There is described a pool chlorinator which uses granular chlorine. The chlorinator has a sealed chamber having a container for the granular chlorine. The container has a vertically moving sleeve forming the side wall and a fixed platform forming the bottom. Water from th pressure side of the pool pump flows across the top of the platform to dissolve the chlorine granules and form a bridge of caked chlorine material in the sleeve above the water. The sleeve is lowered incrementally each time the pump is turned on to move the caked material into dissolving contact with the flowing water.

Abstract: A juice extraction apparatus comprising a generally vertically extending structure having side walls defining a generally vertically extending enclosed space, a vertical passage extending through said space, at least a portion of said passage being defined by a screen so juice from crushed fruit located in said passage may drain therethrough, means to duct extracted juice from within said space, and means to regulate the flow of the crushed fruit through said passage.

Abstract: A compact hydraulic pumping and switching apparatus capable of pumping a hydraulic liquid in connection with an operating liquid supply tank, a clean liquid tank and a dirty liquid reservoir tank in three different modes. One mode fills the supply tank and filters the liquid. A second merely filters liquid from the supply tank. And the third drains the supply tank without filtering the liquid. The apparatus comprises a carrier coupling together, into a single unit, a motor, a pump, a filter and a switching device. The switching device has two spherical stop cocks therein, each with a passage comprising two perpendicular portions. The switching device is connected to the supply tank at two connections and to the clean liquid tank and to the dirty liquid reservoir tank at one connection respectively.

Abstract: A water recovery system in which drain water from appliances, sinks and bathtubs are conserved in a storage recovery tank for treatment and reuse as a water supply for toilets. The drain water is directed through an outlet to flow over a pivoted grate that is mounted above the top opening of the storage tank, with the grate formed of spaced inverted T-shaped ribs and normally held at an acute angle, such as ten degrees, to the horizontal plane by a spring so that debris retained on the grate is washed diagonally downwards off the top surface of the grate to fall off the lower end of the grate into a debris-collection and tank overflow unit. The drain water, itself, falls between the grate ribs into the storage recovery tank.

Abstract: A continuous separation system which continuously purges, washes, dries, and removes solids with a minimum amount of mechanical handling and consequential crystal breakage. A separator within the continuous separation system of the present invention comprises a stationary casing, a horizontal rotary screen within the casing, a fixed scraper mounted in the casing above the screen, an inlet conduit on one side of the scraper for depositing slurry on the screen to form a layer as the screen rotates, an outlet conduit on the other side of the scraper for carrying away dried solids, and gas nozzles for directing a gas stream at the solids as they encounter the scraper, entraining them, and directing them through the outlet conduit. The screen divides the casing interior into respective upper and lower chambers that are sealed from one another except through the screen. In operation, the gas stream carries the entrained solids to a separate receiver.

Abstract: A remote control valve which regulates a reverse osmosis water purifier with only fluid connections between the control valve and the water purifier, no mechanical, electrical, or other such connections, being necessary.

Abstract: A refining vat for the separation of wort from spent grain comprises a sieve base and an impervious discharge base which lies below the sieve base and surrounds a central drain outlet. An intermediate base is substantially concentric with and is smaller in diameter than the sieve base, and is disposed between the sieve base and the discharge base and acts as an accumulator and guide element for the wort.

Abstract: Filtration apparatus that is very versatile is disclosed. The apparatus includes a porous filter disc that can be readily interchanged with other filter discs having the same or different porosity. In addition, a membrane filter can be used in conjunction with the porous filter disc. The porous filter disc serves as a support for the membrane filter. The porous filter disc and membrane when provided are designed to interfit with the balance of the filtration apparatus in such a manner that the filtration unit is simple in construction and highly versatile in use.

Abstract: An oil filter mounting means for an internal combustion engine has an engine engaging end dimensioned and shaped to be mounted on an engine fitting on which an oil filter is normally mounted and has an opposite end with a threaded nipple for receiving an oil filter with first and second conduits extending through the fitting member and a valve means for opening or closing the conduits to permit flow of oil through the filter or to block the flow of oil to permit the filter to be changed without interruption of the operation of the engine.

Abstract: An automatic filtering apparatus which provides an aliquot of filtrate of a particular quantity desired is provided. A solid-liquid mixture is introduced to a filter means under positive air pressure to provide the liquid filtrate. The filtrate flows into a receiving means defining the volume of the particular quantity desired. Excess filtrate flows into an overflow reservoir and out a waste line connected thereto. The filtrate in the receiving means can be transferred into a delivery means. Advantageously, a three-way stop-cock is disposed between the filter receiving means and delivery means and the flow paths are determined by the position of the stop-cock.