EP0641933A1 - Dispositif de dosage - Google Patents

Dispositif de dosage Download PDF

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Publication number
EP0641933A1
EP0641933A1 EP94113383A EP94113383A EP0641933A1 EP 0641933 A1 EP0641933 A1 EP 0641933A1 EP 94113383 A EP94113383 A EP 94113383A EP 94113383 A EP94113383 A EP 94113383A EP 0641933 A1 EP0641933 A1 EP 0641933A1
Authority
EP
European Patent Office
Prior art keywords
dosing device
valve
metering
pressure
line
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP94113383A
Other languages
German (de)
English (en)
Other versions
EP0641933B1 (fr
Inventor
Peter Bosch
Herbert Lipp
Wolfgang Rosenfeldt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
RITTER-IBW DENTALSYSTEME GMBH
Original Assignee
Ritter-IBW Dentalsysteme GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ritter-IBW Dentalsysteme GmbH filed Critical Ritter-IBW Dentalsysteme GmbH
Publication of EP0641933A1 publication Critical patent/EP0641933A1/fr
Application granted granted Critical
Publication of EP0641933B1 publication Critical patent/EP0641933B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
    • F04B9/08—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid
    • F04B9/12—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air
    • F04B9/123—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber
    • F04B9/127—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being fluid the fluid being elastic, e.g. steam or air having only one pumping chamber rectilinear movement of the pumping member in the working direction being obtained by a single-acting elastic-fluid motor, e.g. actuated in the other direction by gravity or a spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B13/00—Pumps specially modified to deliver fixed or variable measured quantities
    • F04B13/02—Pumps specially modified to deliver fixed or variable measured quantities of two or more fluids at the same time
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/12—Valves; Arrangement of valves arranged in or on pistons
    • F04B53/125—Reciprocating valves
    • F04B53/126—Ball valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B2201/00—Pump parameters
    • F04B2201/02—Piston parameters
    • F04B2201/0206—Length of piston stroke

Definitions

  • the invention relates to a metering device for metering an additional liquid into the injection point of a main liquid line, in particular into a water line, with a metering piston designed as a plunger, which is connected to a drive and a control device, the metering piston being immersed in a pumping chamber, the inlet side of which via a a suction line having a suction valve with a reservoir for the additional liquid and on the output side can be connected to the injection point via a pressure line having a pressure valve.
  • the disinfectants used are mostly outgassing media.
  • known metering devices which are used as miniature metering devices for conveying highly concentrated fluids in ever smaller quantities, inhomogeneities of the conveying medium, namely gas bubbles, cause problems. If these gas bubbles are outgassed, for example due to changed pressure conditions, they collect during downtimes at the highest point on the inlet side or directly in front of the pump head, in order to then enter the pump as a large air bubble.
  • the greater the clearance ratio that is the ratio between the clearance and the displacement, the worse the pump is now able to compress the enclosed gas to such an extent that it is pushed out again can be.
  • the gas is only pushed back and forth. A bypass is one way to change this state.
  • the accuracy suffers as a result.
  • DE-GM 78 10 270 discloses a piston metering device for metering an additional liquid into a water pipe.
  • the metering device has a metering piston designed as a plunger, which conveys the additional liquid from a metering agent suction line via check ball valves into the piston chamber.
  • the dosing piston When the dosing piston is immersed again in the piston chamber, the dosing agent enters the dosing line via a check valve.
  • the dosing piston has an upper pump chamber, which is constantly flushed by a part of the water.
  • a water motor is also provided, which drives the metering piston and is driven by the main liquid flow.
  • a disadvantage of this metering device is that the metering device mentioned does not have a stroke volume due to the arrangement of the metering agent suction line, piston chamber and metering line, as well as the check valves, which can be adapted as desired to the metering quantity in accordance with predetermined requirements.
  • this is particularly important if only small amounts of an additional liquid may be added to the main liquid flow.
  • the use of a water pump driven by the main liquid as a drive means for the metering piston does not allow the exact mixing ratio between the additional liquid and the main liquid to be set.
  • the adjustment of the system for operation is very complex, since the time of metering must be set precisely.
  • DE-GM 83 00 366 relates to a piston diaphragm metering device.
  • This has a suction line on the inlet side Suction valve and an associated metering cylinder space and a pre-delivery space.
  • the metering cylinder chamber is connected to the metering point via a pressure line and a pressure valve.
  • a membrane is provided on the dosing piston designed as a plunger.
  • the metering device has an overflow line for the metering agent that has entered the pre-conveying space. Outgassing components of the dosing agent are collected in the pre-delivery chamber.
  • the configuration of the dosing head is very complex. A large number of individual parts are required for this, which results in high production costs.
  • the air or sucked gas collects in the pre-delivery chamber and the performance of the pump drops until venting has been carried out.
  • the object of the invention is therefore to create a metering device of the type described in the introduction while avoiding the disadvantages listed.
  • a dosing device is to be created which is characterized by a reduction in the damage space, the elimination of complex and costly additional systems and an inexpensive production and which enables a defined amount of an additional liquid to be continuously dosed into a main liquid, the dosing being carried out at a precisely defined point in time that is determined by the consumer.
  • the object is achieved in a metering device of the type mentioned in the introduction in that at least one of the valves and the associated line are arranged inside the metering piston and that the metering device is controlled by a flow measuring device through which the mixture of additional liquid and main liquid is supplied to at least one consumer.
  • the valves are located in the front of the pump chamber. It is achieved by the invention that the volume of the chamber on the inlet and outlet side through the metering piston and the opposite end of the pumping chamber and through the small dead volume caused by the volume in the annular space between the metering piston and the surrounding housing and an annular seal, the volume of a Small passage in the suction valve and possibly the channel from the pump chamber to the valve seat of the (outlet-side) pressure valve is determined, the dead volume formed by the latter being determined purely by the statically necessary support for the valve seat of the pressure valve (and the desired passage cross-section), so that it is extremely small can be chosen.
  • the targeted metering can be easily controlled, since the additional liquid is metered in only when a certain amount has been supplied to the consumer. This cannot lead to overdosing.
  • the pump chamber is directly delimited on the inlet side by the suction valve and on the outlet side directly by the metering piston, the harmful dead volume is largely minimized. This reduction in dead space or this reduction in dead volume is also taken into account in that the required pressure line and the pressure valve are arranged in the interior of the metering piston. The previous arrangement of The manufacturing tolerances necessary for the pressure line and the share of the damage caused thereby are significantly reduced.
  • the ratio between usable volume and dead space or dead space volume is> 15. This ratio can be optimally adjusted for a usable volume of more than 0.33 ml. However, for a smaller usable volume than 0.33 ml, a usable / dead space volume ratio of more than 15 possible.
  • the metering piston lies at top dead center TDC on the suction valve defining top dead center.
  • TDC top dead center
  • the main liquid in particular water
  • the suction valve fails, into the reservoir for the additional liquid.
  • backflow or backflow is prevented not only by the suction and pressure valve, which are each check valves, but also by the mode of action of the metering piston at top dead center.
  • the suction valve is preferably a flutter valve. But it can also be a spring-loaded valve.
  • the pressure valve is preferably a ball valve. But also here a spring-loaded valve can be used as a pressure valve.
  • the metering piston is surrounded by a prestressed spring serving as a return spring.
  • This spring also surrounds an adjusting sleeve which is adjustably arranged in the housing of the metering device.
  • the adjusting sleeve serves according to the invention as a stop and thus as a bottom dead center UT when the metering piston is moved in the direction of bottom dead center.
  • the stroke volume of the piston is both variable and thus the usable volume can be adapted to the respective intended use, and it also ensures a defined stop and thus defined bottom dead center of the piston.
  • the pressure line is arranged at the rear end of the metering piston inside the adjusting sleeve.
  • the adjusting sleeve preferably has in its interior a further line serving as a compressed air line. Both the pressure line and the compressed air line are designed as hoses in the interior of the adjusting sleeve. This training ensures that the metering piston can move freely during the stroke, without compressed air and pressure lines having a disruptive effect.
  • the compressed air line preferably passes from the adjusting sleeve into the interior of the metering piston. Through an opening in the metering piston, it is connected to a compressed air chamber inside the housing of the metering device.
  • the flow measuring device is a mixing container and two pressure sensors, the latter being arranged in each case at one of the outputs of the mixing container.
  • These pressure sensors are used to monitor the pressure of the mixture of additional liquid and main liquid in the mixing tank and at the same time serve to regulate the control of the metering device. In this way, additional liquid is only fed into the main liquid line again when a certain amount of the mixture has been supplied to the consumers.
  • the mixing container is preferably spherical and has two pressure chambers which are separated from one another by a membrane. These pressure chambers have a hemispherical shape.
  • the membrane is attached centrally in the interior of the pressure vessel to limit the individual pressure chambers.
  • the membrane is highly flexible, so that when the mixture flows through the inlet into a pressure chamber, it pushes out the mixture in the other pressure chamber through the outlet towards the consumer and then, after emptying this pressure chamber, contacts the outlet so that it is there located pressure sensor detects a pressure drop and forwards corresponding information, on the basis of which additional liquid is again metered into the main liquid. In this way, only a defined quantity with a defined mixing ratio is supplied to the consumer. An overdose is prevented.
  • Each of the pressure chambers has its own entrance as well as its own exit.
  • the outputs of the two pressure chambers are then connected to an output valve via two inputs of the same.
  • the output valve is used so that the mixture can be pressed out of the just completely filled pressure chamber by switching the output valve and then reaches the respective consumer. This reversal process only takes place if a pressure drop is reported by the pressure sensors when the respective outlet of the pressure chamber is closed by the membrane.
  • the inputs of the pressure chambers are connected to two outputs of an input valve via pressure relief valves. These inlet valves are switched accordingly after the pressure drop is detected, so that the empty pressure chamber is filled with the mixture after the pressure drop is detected. This filling also only ever takes place after a pressure drop at one of the pressure chamber outputs.
  • the inlet valve is connected via the main liquid line to the main liquid supply serving as a pressure source, in particular a water connection.
  • the injection point for metering in the additional liquid is preferably arranged between the main liquid supply and the inlet valve.
  • the amount of additional liquid sucked in by the dosing piston is introduced into the water circuit via the injection point.
  • This metered additional liquid flows together with the main liquid flowing in via the inlet valve, in particular water, into the mixing container, the two liquids mixing with one another. In this way, better mixing is achieved than if the additional liquid to be metered in is first metered into the mixing container.
  • the additional liquid is preferably hydrogen peroxide H2O2. Hydrogen peroxide is odorless, tasteless and completely water-soluble. It also does not combine with other chemicals and is non-toxic at low concentrations.
  • the storage container preferably has a volume of 1 l.
  • the mixing container preferably has a volume of 330 ccm. These volumes help create a mixture of hydrogen peroxide and water, which can be adjusted to 30-90 ppm H2O2, the hydrogen peroxide being a three percent solution.
  • a fill level sensor on the storage container ensures that a certain fill quantity is not undershot, so that a defined quantity of hydrogen peroxide can always be fed into the main liquid, namely water.
  • the metering device 1 has a housing 2 which is provided with a plurality of cavities 3, 4 on the inside.
  • a metering piston 5 designed as a plunger and an adjusting sleeve 6 are inserted into these cavities 3, 4.
  • a pump chamber 7 is formed in the cavity 4 and is delimited on the inlet side by a suction valve 8 placed on the housing and on the outlet side by the metering piston 5.
  • the suction valve 8 has a flap 8a as a valve body and is connected via a suction line 9 to a storage container, not shown. In this embodiment, two suction lines 9, 10 are shown.
  • the suction valve can be a flutter valve or any other suitable valve, e.g. be a spring loaded valve.
  • a pressure valve 11 with a valve body 11a - here as a ball valve with a valve ball - is formed, which is connected via a subsequent pressure line 12 to a metering point, not shown.
  • the pressure line 12 is housed on the one hand in the interior of the metering piston 5 and on the other hand also in the interior of the adjusting sleeve 6. Inside the adjusting sleeve 6 it is a hose.
  • the pressure valve 11 can be a ball valve, but also any other suitable valve, e.g. act as a spring-loaded. Both the suction valve 8 and the pressure valve 11 are designed as check valves.
  • a compressed air line 13 is also formed, which is a hose in the interior of the adjusting sleeve 6.
  • the compressed air line 13 passes from the adjusting sleeve 6 into the interior of the metering piston 5.
  • the metering piston 5 has an opening 14. Over this opening 14, the compressed air line 13 is connected to a compressed air chamber 15 which is formed in the cavity 3.
  • the metering piston 5 is surrounded within the cavity 3 by a return spring 16. This return spring also surrounds the adjusting sleeve 6.
  • the adjusting sleeve 6 is adjustable within the cavity 3. When moving the metering piston 5, it serves as a stop for the same when it moves in the direction of the bottom dead center.
  • the dosing piston is shown after the suction stroke in its position in the bottom dead center.
  • the useful volume of the pump chamber 7 can be increased or decreased.
  • the usable volume is preferably more than 0.33 ml.
  • the compressed air chamber 15 is supplied with compressed air via a compressed air valve, not shown, via the compressed air line 13.
  • the pump chamber 7 is filled with the additional liquid 7 in the position of the metering piston 5 shown.
  • the metering piston 5 is sealed off from the housing 2 by means of sealing rings 18, 19, 20.
  • the dead space initially left is the dead volume designated 23 in the end face of the piston 5 on the pump chamber side of the valve body 11 a, wherein this space can also be designed, in particular, for static reasons - as a short cylindrical channel or similar.
  • a dead volume 21 can be provided in the annular space between the metering piston 5 and the surrounding cylindrical housing 2 and the ring seal 20.
  • a small passage remains as a dead volume 22 in the flap 8a of the suction valve 8.
  • the total volume of these harmful spaces 21, 22, 23 is a maximum of 0.022 ml.
  • the dosing piston 5 rests on the suction valve 8 and closes it.
  • the compressed air chamber 15 has been emptied by means of the compressed air valve, not shown.
  • the top dead center represents the rest position of the metering piston 5.
  • FIG. 2 shows a flow measuring device in the context of a device 24 that can be used as a water disinfection system for the permanent metering of a main liquid, water, mixed with an additional liquid, hydrogen peroxide.
  • the device 24 has a mixing container 25, which in the exemplary embodiment shown is spherical and consists of two pressure chambers which are separated from one another by a membrane 28.
  • the pressure chambers 26, 27 are hemispherical.
  • the membrane 28 is arranged centrally in the interior of the mixing container 25 and is designed to be highly flexible.
  • Each of the pressure chambers 26, 27 has an inlet 29, 30 and an outlet 31, 32. The highly flexible membrane 28 can contact these outputs 31, 32.
  • the outputs 31, 32 of the two pressure chambers 26, 27 are connected to an output valve 33 via two inputs thereof.
  • the output valve 33 is a 3/2-way solenoid valve.
  • pressure sensors 34, 35 in front of the outlet valve 33 at the outlets 31, 32.
  • a pressure relief valve 36, 37 is arranged at the inlets 29, 30 of the pressure chambers 26, 27.
  • the pressure sensors 34, 35 can be piezoresistive pressure sensors, and the input valve 38 is a 3/2-way solenoid valve.
  • the outlet valve 33 is connected to the consumers 40, 41 for the mixture.
  • the input valve 38 is connected via a main liquid line 42 to a liquid supply serving as a pressure source, here a water connection 39. Between the inlet valve 38 and the water connection 39 there is the injection point 43, via which the additional liquid, here hydrogen peroxide, is metered into the main liquid line 42.
  • a manometer 44 and a water pressure regulator 45 are also present in the main liquid line 42 between the injection point 43 and the water connection 39.
  • the main liquid line 42 is connected to the metering device 1 described in FIG. 1 via the injection point 43.
  • the metering device 1 is arranged in a storage container 46 into which the additional liquid, here hydrogen peroxide, is filled.
  • the metering cylinder 1 is connected to a compressed air source 48 via an inlet valve 47 serving as a compressed air valve.
  • the input valve 47 is a 3/2-way valve.
  • the storage container 46 has a volume of 1 l
  • the mixing container 25 has a volume of 330 ccm.
  • a fill level sensor (not shown) for measuring the fill level can be attached to the reservoir 46. If the level falls below a specified level, it issues a signal. In this way, it should be ensured that 1 l of H2O2 can be introduced into the storage container without any remaining amount.
  • the hydrogen peroxide is mixed with silver and phosphate, since pure H2O2 can no longer be stored.
  • the reservoir 46 is filled with a 3% hydrogen peroxide solution.
  • the water pressure is set by the water pressure regulator 45 to the desired operating pressure. It is permanently displayed by means of the manometer 44.
  • the water coming from the water connection 39 flows via the inlet valve 38, depending on which outlet of the inlet valve 38 is open, into one of the pressure chambers 26, 27. In FIG. 2, the pressure chamber 26 is being filled.
  • the 3/2-way valve 47 is actuated. Compressed air flows from the compressed air source 48 via the compressed air line 13 into the compressed air chamber 15 of the metering device 1.
  • the metering piston 5 moves from its rest position, during which it rests on the suction valve 8 at top dead center, in the direction of bottom dead center.
  • the metering piston 5 moves against the bias of the return spring 16 until it has reached the stop defined by the adjusting sleeve 6, its bottom dead center.
  • hydrogen peroxide is drawn in from the reservoir 46 through the suction valve 8 into the pump chamber 7 due to the prevailing negative pressure through the suction lines 9, 10.
  • the metering piston 5 remains in this upper position for about one second. Since the pressure valve 11 is designed as a check valve, no liquid can get back into the pump chamber 7 during the suction stroke.
  • the compressed air chamber 15 empties via the compressed air line 13, and by means of the restoring force of the restoring spring 16, the metering piston moves in the direction of its top dead center. Since the suction valve 8 is designed as a check valve, no additional liquid can be in the Reservoir 46 returned.
  • the pressure valve 11 inside the metering piston 5 opens, and the hydrogen peroxide is conveyed to the injection point 43 via the pressure line 12. Since the H2O2 only stays in the pump chamber 7 for a short time, the gas bubble formation in this pump chamber 7 is largely suppressed. Keeping this dwell time short is necessary because the O is easily split off from the hydrogen and outgassed.
  • the gas that is still formed collects in the movement of the metering piston 5 in the direction of its top dead center in the harmful spaces 21, 22, 23.
  • the suction valve 8 is closed by means of the metering piston 5 by its support. This prevents that, for example, if the pressure valve 11 and the suction valve 8 would allow water leakage while the dosing piston 5 is in the rest position, no water can get into the reservoir 46.
  • the ratio of usable volume to dead volume is more than 15.
  • the usable volume is preferably about 0.33 ml and the dead volume is 0.022 ml. This makes it possible to add about 0.33 ml of a 3% H202 solution to the water.
  • the hydrogen peroxide metered into the main liquid line 42 via the injection point 43 now passes with the water into the pressure chamber 26 of the mixing container 25.
  • the pressure of the hydrogen peroxide is always higher than that of the water flowing through the main liquid line 42. This ensures that the additional liquid really gets into the mixing container 25.
  • the pressure valve 11 of the metering device 1 ensures after the end of the metering process that no water through the main liquid line 42 and the injection site 43 can get into the dosing device 1.
  • the membrane 28 moves through the inflowing mixture of water and hydrogen peroxide into the pressure chamber 27. If the spherical mixing container 25 is completely filled with the mixture, then the membrane 28 closes the outlet 32 of the pressure chamber 27.
  • the signal at the pressure sensor 35 triggered thereby causes the inputs of the outlet valve 33 and the outputs of the inlet valve 38 to the corresponding other pressure chamber 26 , 27 switched.
  • the input of the output valve 33 is now on the pressure chamber 26, the output of the input valve 38 on the pressure chamber 27.
  • a signal reaches the 3/2-way valve 47 for the compressed air.
  • a new cycle for metering the hydrogen peroxide in the manner described begins. The mixture of water and hydrogen peroxide now flows into the pressure chamber 27.
  • the membrane 25 moves in the direction of the pressure chamber 26 to be emptied and presses the mixture therein via the outlet valve 33 to the consumers 40, 41. If the pressure chamber 26 is completely empty, then the membrane 28 bears against the outlet 31 of the pressure chamber 26, and the pressure sensor 34 registers a drop in pressure. Then there is again a switching of the input valve 38, the output valve 33 and a switching of the input valve 47 for the compressed air. A new cycle begins.
  • this is a metering device and also a corresponding device for metering a mixture of additional liquid and main liquid is created, by means of which a precisely metered amount of a degassing additional liquid can be added to the main liquid.
  • the suction stroke of the piston can be adjusted between 0-12.5 mm depending on the application. With a 4.2 mm suction stroke, there is a usable volume of 0.33 ml, with a 12.5 mm suction stroke, a usable volume of 0.98 ml. Due to a ratio of the rest phase to the work phase of around 12, there is only a possibility of degassing in the remaining damaged areas. And it is also possible for consumers who use different quantities, e.g. between 30 ccm / min and 1500 ccm / min, of the mixture need to supply one with a precisely defined mixing ratio.
  • the use of the metering device according to the invention is of course not limited to the exemplary embodiment shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Paper (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
EP94113383A 1993-09-02 1994-08-26 Dispositif de dosage Expired - Lifetime EP0641933B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4329632A DE4329632A1 (de) 1993-09-02 1993-09-02 Dosierpumpe
DE4329632 1993-09-02

Publications (2)

Publication Number Publication Date
EP0641933A1 true EP0641933A1 (fr) 1995-03-08
EP0641933B1 EP0641933B1 (fr) 1996-05-22

Family

ID=6496662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94113383A Expired - Lifetime EP0641933B1 (fr) 1993-09-02 1994-08-26 Dispositif de dosage

Country Status (3)

Country Link
EP (1) EP0641933B1 (fr)
AT (1) ATE138450T1 (fr)
DE (2) DE4329632A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114837911A (zh) * 2022-04-22 2022-08-02 杭州中亚机械股份有限公司 一种无菌灌装用定量泵
WO2024157077A1 (fr) * 2023-01-24 2024-08-02 Mixtron S.R.L. Dispositif doseur volumétrique proportionnel

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236339B (de) * 1956-09-14 1967-03-09 Milton Roy Co Vorrichtung zum Dosieren von Fluessigkeiten
EP0007109A1 (fr) * 1978-07-19 1980-01-23 Lang Apparatebau Gmbh Appareil pour le dosage d'une solution d'agents chimiques dans un courant de liquide
EP0081300A1 (fr) * 1981-12-07 1983-06-15 Haskel, Inc. Pompe synchronique pour mélanger et pomper
US5055008A (en) * 1990-01-29 1991-10-08 Chemilizer Products, Inc. Proportionating pump for liquid additive metering

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1236339B (de) * 1956-09-14 1967-03-09 Milton Roy Co Vorrichtung zum Dosieren von Fluessigkeiten
EP0007109A1 (fr) * 1978-07-19 1980-01-23 Lang Apparatebau Gmbh Appareil pour le dosage d'une solution d'agents chimiques dans un courant de liquide
EP0081300A1 (fr) * 1981-12-07 1983-06-15 Haskel, Inc. Pompe synchronique pour mélanger et pomper
US5055008A (en) * 1990-01-29 1991-10-08 Chemilizer Products, Inc. Proportionating pump for liquid additive metering

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114837911A (zh) * 2022-04-22 2022-08-02 杭州中亚机械股份有限公司 一种无菌灌装用定量泵
WO2024157077A1 (fr) * 2023-01-24 2024-08-02 Mixtron S.R.L. Dispositif doseur volumétrique proportionnel

Also Published As

Publication number Publication date
EP0641933B1 (fr) 1996-05-22
DE59400295D1 (de) 1996-06-27
ATE138450T1 (de) 1996-06-15
DE4329632A1 (de) 1995-03-09

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