US20040234377A1 - Dosing pump - Google Patents

Dosing pump Download PDF

Info

Publication number
US20040234377A1
US20040234377A1 US10/485,908 US48590804A US2004234377A1 US 20040234377 A1 US20040234377 A1 US 20040234377A1 US 48590804 A US48590804 A US 48590804A US 2004234377 A1 US2004234377 A1 US 2004234377A1
Authority
US
United States
Prior art keywords
valve
pump
drive
motor
working
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.)
Abandoned
Application number
US10/485,908
Other languages
English (en)
Inventor
Erwin Bolt
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.)
KNF Flodos AG
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to KNF FLODOS AG reassignment KNF FLODOS AG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOLT, ERWIN
Publication of US20040234377A1 publication Critical patent/US20040234377A1/en
Abandoned legal-status Critical Current

Links

Images

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
    • F04B7/00—Piston machines or pumps characterised by having positively-driven valving
    • F04B7/0076—Piston machines or pumps characterised by having positively-driven valving the members being actuated by electro-magnetic means
    • 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
    • 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
    • F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
    • F04B49/06—Control using electricity
    • F04B49/065—Control using electricity and making use of computers
    • 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
    • F04B2201/0201—Position of the piston
    • 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
    • F04B2201/12—Parameters of driving or driven means
    • F04B2201/1208—Angular position of the shaft

Definitions

  • the invention relates to a dosing pump, particularly a diaphragm dosing pump comprising a working membrane or a similar displacement element defining a working area and a pump drive for creating an oscillating movement of the displacement element.
  • the direction of the pump drive can be reversed and the displacement element can be moved back and forth.
  • the invention also comprises a position sensor for detecting the position of the pump drive and an electronic control system for the drive, as well as a pump head, in which an inlet valve and an outlet valve are arranged.
  • Dosing pumps of this type are known in various configurations. There are known dosing pumps, which operate by a magnetic drive and execute fast working strokes. This pulse-like feeding produces sufficient pressure differences for the control of the valves.
  • the feeding stroke is changed by moving the pump drive forwards and backwards for different rotational segments with corresponding different strokes, starting from a defined home position.
  • dosing pumps are known, wherein a mechanical change of the stroke length is performed to adjust the dosing amount. Therefore, small dosing amounts having a sufficiently high feeding rate, which produces a sufficient pressure difference and is sufficient for the functioning of the valves, can also be processed. However, the pumping medium is discharged at a high speed corresponding to the working rate sufficient for the functioning of the valves. This pulse-like feeding is undesirable in many dosing pumps applications.
  • the object of the present invention is to create a dosing pump, which can cover a broad operating range with very small dosing amounts and high repeatability, and which can provide exact adjustability of the pump over a wide range of operating conditions, wherein the pump shall exhibit high dosing accuracy both for large and also for very small feeding amounts and wherein the feeding rate can also be set to an extremely low value while maintaining high dosing accuracy.
  • the pump drive has a reciprocating positioning motor with a part connected to a displacement element that can move back and forth in any range of its total working movement with a predetermined stroke for a feeding amount that is reduced relative to the maximum feeding amount.
  • the pump further comprising two or more valves whereby at least one is remote controlled and has a motor-driven valve drive.
  • An electronic control system is connected at least to the motor-driven valve drive or drives of an inlet and/or outlet valve, to a pump drive, and also to a position sensor for detecting the position of the displacement element and/or the pump drive.
  • the reciprocating stroke can be influenced as a function of the position within the total working area.
  • the effective stroke of the displacement element can be influenced.
  • a smaller effective stroke is produced than in an area between these two dead center positions.
  • the dosing pump according to the invention can be operated both in any range of the total working movement of its pump drive with an oscillating working stroke moving back and forth and also rotating with maximum working stroke and corresponding maximum feeding amount per working stroke. This produces a wide range of uses for the dosing pump.
  • the electronic control system can be configured for variable control of the motor-driven valve drive or drives of the inlet and/or outlet valve as a function of the position of the displacement element. Furthermore, the electronic control system may control the motor-driven valve drive or drives of the inlet and/or outlet valve as a function of different operating parameters, especially as a function of operating pressure, revolutions per minute (rpm), consistency of the pumping medium, and the like.
  • the switching positions of the valve or valves within a rotating or an oscillating stroke area are chosen as a function of the operating pressure, such that pump capacity loss due to counter pressure is minimized.
  • the matching switching positions can be determined through tests, furthermore, there is also the possibility of performing a variable correction of the switching positions as a function of operating pressure, if this is changed.
  • the corresponding default settings can be set manually or by analog or digital means.
  • the electronic control system can have a memory means for storing various operating parameters and for assigning these operating parameters to different control times of the valve or valves.
  • the operating parameters stored in the memory means can be selected either manually or selected by measuring the actual operating parameters and assigning the stored operating parameters.
  • corresponding measurement devices for measuring e.g., operating pressure, counter pressure, rpm, and the like are provided.
  • the pump drive can have a cam or crank drive with a rotating crank element and a connecting rod connected to the working membrane or a similar displacement element, wherein the crank element can be moved back and forth in an oscillating movement in any range within the total rotational movement for small deflections of the working membrane relative to the maximum possible deflections for a rotational movement.
  • the cam or crank drive converts a rotating movement into a linear movement of the displacement element. This executes back and forth movements within the extreme positions in the upper and lower dead centers of the crank drive.
  • the oscillating stroke movement provides a small working stroke and has a significantly smaller amplitude, wherein the drive does not rotate, but instead moves back and forth correspondingly within the possible rotation of its rotating crank element by controlling the driving positioning motor correspondingly.
  • the reciprocating stroke movement with reduced amplitude relative to the maximum amplitude, both the number of working strokes of the working membrane, or the like, per unit of time and/or the drive speed can be adjusted.
  • the dosing amounts can be influenced by both measures and also the pump characteristics, particularly with regard to the feeding rate.
  • a smaller stroke at a higher working speed or the inverse, a larger stroke at a lower working speed can be set. In the latter case, the pumping medium is fed more gently.
  • the electronic control system may be set to a non-constant drive speed of the drive motor, particularly for a fast suction stroke and a correspondingly slower dosing stroke.
  • This compensation corresponds approximately to a sinusoidal movement with the overlapping of hydraulic phenomena unique to diaphragm pumps.
  • the matching stroke compensation can be preset by a speed profile per rotation or working stroke, which is stored as parameters in the electronic control system.
  • the inlet and/or outlet valve can have an electromagnetic stroke magnet as a motor-driven valve drive.
  • the electromagnetic stroke magnet has a stroke armature that is guided by means of leaf springs set at a distance from each other and that is in drive connection with a valve closing body.
  • the support of the armature of the stroke magnet with the help of at least two leaf springs produces a spring parallelogram suspension, which is practically free from wear and tear and insensitive to contamination, because there are no parts supported by sliding guides.
  • the armature is precisely guided in the radial direction and play-free in the stroke direction.
  • the stroke drive for the inlet valve and/or for the outlet valve has an especially long service life due to these means.
  • At least one of the leaf springs of the stroke armature guide is pre-tensioned in the closing direction of the remote-controlled valve.
  • the valve is therefore closed for an inactive stroke and thus sealed tightly against reverse flow.
  • a cost-effective, simple-acting stroke electromagnet can be used, because the leaf spring(s) can assume the closing movement of the valve.
  • At least one valve particularly with an elastic valve disk that can be activated by the pumping medium.
  • the elastic valve disk contacts, in the closing position with a flat side on the opening edge of a supply channel forming a valve seat.
  • valve produces a good seal also for only small pressure differences possibly occurring during operation. Therefore, the pump has good vacuum properties even at low working speeds.
  • valve that can be activated by the pumping medium forms a complete, exchangeable unit and is formed as a valve insert with a support plate having the support and a discharge channel, a valve holding plate, and also the valve disk, and that preferably the support plate and the valve holding plate have edge formations that engage each other and are especially welded, adhered, or similarly connected to each other in the assembled position.
  • the parts for the complete valve inserts can be manufactured independently of the pump head, in which the valve insert is inserted, which has considerable advantages in terms of accuracy for molding technology.
  • valve parts leading to, among other things, a tension-free support of the valve disk, which is a prerequisite for acceptable operation of the valves with good sealing even at low pressure differences and very slow movement sequences.
  • valve inserts can be exchanged as a whole very simply.
  • the pump drive can have, as the drive and positioning motor, a controlled or a regulated motor particularly a stepper motor or a motor regulated by a control loop, e.g., a servo DC motor or the like.
  • a controlled or a regulated motor particularly a stepper motor or a motor regulated by a control loop, e.g., a servo DC motor or the like.
  • a preferred position sensor is a non-contact, e.g., optoelectronic or magnetic position sensor, which interacts with the positioning motor or a part driven by this motor and is connected to the control electronics. Therefore, the position of the working membrane is known in each operating phase so that for a corresponding drive motor working in a control loop, this motor receives positioning feedback and on the other hand the inlet and/or outlet valve can be exactly adapted to the position of the working membrane.
  • the position sensor can be configured so that it outputs a reference signal at clearly defined positions, e.g., at the top or bottom dead center, from which the intermediate positions can be calculated within a rotation or a reciprocating movement of the pump drive.
  • the position sensor can also have an encoder, through which the appropriate position of the pump drive or the working membrane driven by this drive can be determined directly.
  • FIG. 1 a perspective representation of a dosing pump with control system
  • FIG. 2 a sectional representation of a dosing pump with an electromagnetically activated inlet valve
  • FIG. 3 a longitudinal sectional representation, as well as
  • FIG. 4 a cross-sectional representation of a dosing pump
  • FIG. 5 a cross section of a valve insert.
  • a dosing pump 1 shown in FIG. 1 having a motor-driven pump drive 2 for a reciprocating movement of a displacement element.
  • the dosing pump 1 has a pump housing 3 with a pump head 4 , in which at least one inlet valve and one outlet valve are arranged. To activate these valves, electromagnetic stroke drives 5 , 6 are provided in the embodiment according to FIG. 1.
  • the electromotor-driven pump drive 2 , the electromagnetic stroke drives 5 , 6 for the valves, and a position sensor for detecting the position of the pump drive are connected to an electronic control system 7 .
  • the pump drive 2 formed can be variably controlled by a positioning motor with reference to its rpm and its rotational direction.
  • the electronic control device 7 is formed so that the pump drive can move back and forth in an oscillating movement with the positioning motor in any range of its total working movement with a stroke that can be preset.
  • This reciprocating stroke movement can be used to define a feeding amount that is reduced relative to the maximum feeding amount.
  • the pump drive can be operated with a rotational angle and a speed that can be preset.
  • valves provided in the embodiment according to FIG. 1 with electromagnetic stroke drives 5 and 6 also allow closing and opening times that can be variably assigned to the working position of the pump drive.
  • a plurality of operating parameters can be defined in order to be able to adapt the pumps to the widest range of operating conditions.
  • FIG. 2 shows the inner structure of a dosing pump according to the invention.
  • This depicts a diaphragm pump with a membrane 8 as the displacement element, wherein the membrane has a crank drive 9 with a rotating crank element 10 and a connecting rod 11 connected to the membrane 8 as the pump drive.
  • the crank element 10 is connected to positioning motor 12 (refer to FIG. 3).
  • the outlet valve 14 is formed as a valve that is sensitive to small pressure differences. For certain dosing tasks, which operate with a minimum feeding rate, this configuration provides good use with different valves.
  • valve 15 shown in FIG. 5 can be provided selectively as an inlet valve or outlet valve.
  • This valve 15 for example, is configured so that it exhibits a reliable sealing behavior even for low working or feeding rates and the resulting low pressure differences between the suction side and the pressure side.
  • the valve is formed as a disk valve and essentially has a support plate 16 , a valve disk 17 , and also a valve holding plate 18 .
  • a complete, can-shaped unit as the valve insert is formed by these three parts 16 , 17 , and 18 . This valve insert can be inserted into a corresponding holding recess of the pump head.
  • valve disk 17 For a valve arranged on the suction side, in the closed position the valve disk 17 lies with its flat side facing the suction side 19 on the opening edge 20 of a central supply channel 21 forming a valve seat in the valve holding plate 18 .
  • the valve disk 17 is fixed against lateral displacements by positioning tabs, which are arranged laterally adjacent to the opening edge and engage in open recesses in the edge of the valve disk 17 .
  • the support plate 16 has a bridge-like support 22 within the extended projection of the supply channel of the valve holding plate 18 , by means of which the valve disk 17 is supported in the opening position approximately along its diameter.
  • valve disk tabs located on both sides of the center support line are pivoted towards the support plate 16 , so that the supply channel 21 is opened.
  • the distance of the plane running through the support point of the support 22 from the parallel plane formed by the opening edge 20 is dimensioned so that the valve disk 17 is held there tension-free. This is a prerequisite for the valve disk to respond at very low pressure differences and also for a fast closing or opening process.
  • valve 15 on the pressure side the valve is inserted turned by 180 degrees.
  • remote-controlled valves are preferably used both for the inlet valve 13 and also for the outlet valve 14 .
  • One such valve is shown as an inlet valve in FIG. 2.
  • the electromagnetic stroke drive 5 has a stroke armature 25 , which is guided by means of leaf springs 23 , 24 spaced apart from each other and which is in drive connection with a valve closing body 26 .
  • a sleeve-like iron pole 27 is arranged at a distance to the armature.
  • a coil 28 which, when it is excited, moves the stroke armature 25 in the direction of the arrow Pf 1 and thus brings the valve closing body 26 into the open position.
  • a parallelogram suspension for the stroke armature 25 is formed by the two leaf springs 23 , 24 , so that no parts supported by sliding guides are necessary.
  • the stroke armature 25 is guided in the radial direction precisely and play-free in the stroke direction.
  • at least one of the two leaf springs of the stroke armature guide is pretensioned in the closing direction. Therefore, in the no-current state the valve goes into the closed position, which is shown in FIG. 2.
  • rocker lever 29 To transfer the stroke movement of the stroke armature 25 to the valve closing body 26 , there is a rocker lever 29 , which is coupled with its drive end to a shaft 30 connected to the stroke armature and with its other end is connected to the valve closing body 26 .
  • rocker support 31 In the course of the longitudinal extension of the rocker lever 29 , there is a rocker support 31 , which encloses the rocker lever 29 in a sealing manner and which also seals a valve space from the outside.
  • the rocker support is preferably formed as an elastomer bushing, so that an absolute seal is provided.
  • the dosing pump 1 is equipped with a position sensor 32 for detecting the position of the pump drive or the membrane 8 forming the displacement element, as can be easily seen in FIGS. 3 and 4.
  • the position sensor has a magnet 33 rotating with the crank element 10 , as well as a magnetic sensor preferably formed as a Hall sensor and arranged stationary adjacent to the rotational track of the magnet 33 .
  • a reference signal is generated for each rotation of the pump drive.
  • the other positioning device is oriented accordingly to this reference signal.
  • the reference signal is used for resetting or for generating a certain correction value.
  • stepper motor With the use of a stepper motor, very small step angles are possible, so that the membrane 8 can be brought into any arbitrary position within its total working area. Thus, the setting can proceed extremely slowly, wherein working strokes extending over several minutes are possible. However, on the other hand, higher RPMs can also be processed in order to achieve a high pump capacity.
  • the positioning motor 2 , the electromagnetic stroke drives 5 and 6 for the inlet valve 13 and the outlet valve 14 , and also the position sensor 32 are connected to the electronic control system 7 . Therefore, the function of the pump can be varied within wide limits.
  • the electro-magnetic stroke drives 5 , 6 of the valves can be controlled as a function of the position of the membrane 8 .
  • valves independent of the position of the pump drive or the membrane.
  • this can occur as a function of different operating parameters, especially as a function of operating pressure, rpm, consistency of the pumping medium, and the like.
  • a memory device there it is possible to store different operating parameters which can then be assigned to different control times of the valves.
  • a non-uniform working rate of the drive motor can also be set with the help of the electronic control system 7 for a fast suction stroke and a correspondingly slower dosing stroke. Therefore, instead of an otherwise approximately sinusoidal fluid feeding, the flow can be made more uniform.
  • both valves are remote-controlled, then there is also the possibility of controlling the feeding device. Even for a dosing pump, this possibility is an advantage, because after a dosing process with discharge of the pumping medium from the pressure channel, undesired reverse flow or return drops of the pumping medium can be prevented by switching the feeding direction through the control of both valves. To prevent the previously mentioned reverse flow or return droplets of pumping medium, a partial stroke of the working membrane with a controlled valve closing is usually sufficient.
  • the dosing accuracy of the dosing pump 1 can be significantly improved by these measures and simpler handling is also possible when setting the dosing amount.
  • the dosing pump 1 with remote-controlled inlet and outlet valve 13 , 14 can be used not only for reverse feeding for preventing reverse flow, but also selectively for continuous feeding in both feeding directions.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Reciprocating Pumps (AREA)
  • Vending Machines For Individual Products (AREA)
  • Medicines Containing Plant Substances (AREA)
  • Peptides Or Proteins (AREA)
US10/485,908 2001-12-20 2002-10-04 Dosing pump Abandoned US20040234377A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10162773.4 2001-12-20
DE10162773A DE10162773A1 (de) 2001-12-20 2001-12-20 Dosierpumpe
PCT/EP2002/011151 WO2003054392A1 (fr) 2001-12-20 2002-10-04 Pompe de dosage

Publications (1)

Publication Number Publication Date
US20040234377A1 true US20040234377A1 (en) 2004-11-25

Family

ID=7710050

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/485,908 Abandoned US20040234377A1 (en) 2001-12-20 2002-10-04 Dosing pump

Country Status (6)

Country Link
US (1) US20040234377A1 (fr)
EP (1) EP1456539B1 (fr)
JP (1) JP4060273B2 (fr)
AT (1) ATE377149T1 (fr)
DE (2) DE10162773A1 (fr)
WO (1) WO2003054392A1 (fr)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080050251A1 (en) * 2006-08-24 2008-02-28 N.A.H. Zabar Ltd. Reciprocatory fluid pump
US20090043239A1 (en) * 2005-05-27 2009-02-12 Alfred Gagel Device and method for transporting medicinal liquids
US20090097986A1 (en) * 2006-08-30 2009-04-16 Daikin Industries, Ltd. Oil pressure unit and speed control method of motor in oil pressure unit
CH702437A1 (fr) * 2009-12-23 2011-06-30 Jean-Denis Rochat Pompe volumetrique alternative a membrane pour usage medical.
US20110189029A1 (en) * 2010-02-02 2011-08-04 Van De Velde Peter Hydraulic fluid control system for a diaphragm pump
US20120107150A1 (en) * 2010-11-02 2012-05-03 Bogdan Pawlak Radial Diaphragm Pump
CN102762860A (zh) * 2010-02-18 2012-10-31 格伦德福斯管理联合股份公司 计量泵机组以及控制计量泵机组的方法
CN102859196A (zh) * 2010-03-24 2013-01-02 卓越剂量技术有限公司 用于控制和/或调节计量泵的方法
WO2013013725A1 (fr) * 2011-07-28 2013-01-31 Ecolab Inc. Pompe à membrane destinée à doser un fluide et procédé correspondant
US20130240570A1 (en) * 2010-05-18 2013-09-19 Aktiebolaget Electrolux Battery-powered dosing device
CN108374780A (zh) * 2018-05-10 2018-08-07 无锡市天利流体科技有限公司 高精度智能蠕动泵
CN110792581A (zh) * 2018-08-03 2020-02-14 罗伯特·博世有限公司 泵和用于泵的运行以及用于确定上和/或下止点的方法
WO2020044100A1 (fr) * 2018-08-27 2020-03-05 Saudi Arabian Oil Company Système de pompage
US11118577B2 (en) * 2018-07-06 2021-09-14 Grundfos Holding A/S Metering pump and method for controlling a metering pump

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7335003B2 (en) * 2004-07-09 2008-02-26 Saint-Gobain Performance Plastics Corporation Precision dispense pump
DE102005039772A1 (de) 2005-08-22 2007-03-08 Prominent Dosiertechnik Gmbh Magnetdosierpumpe
DE102006045450B4 (de) * 2006-09-19 2008-07-10 Lechler Gmbh Spritzvorrichtung zum Versprühen von Spritzmitteln sowie Verfahren zum Betreiben einer solchen Spritzvorrichtung
US8479784B2 (en) 2007-03-15 2013-07-09 The Coca-Cola Company Multiple stream filling system
US9394153B2 (en) 2007-03-15 2016-07-19 The Coca-Cola Company Multiple stream filling system
JP2011512126A (ja) 2008-02-04 2011-04-21 ザ・コカ−コーラ・カンパニー 特注飲料製品の作製方法
DE102008031049A1 (de) * 2008-06-30 2009-12-31 Lewa Gmbh Vorrichtung zum Portionieren förderbarer Medien
DE102016109318A1 (de) * 2016-05-20 2017-11-23 Max Wild Gmbh Kolbenpumpe
DE102017112975B3 (de) 2017-06-13 2018-10-25 KNF Micro AG Membranpumpe
FR3074544B1 (fr) * 2017-12-05 2021-10-22 Ams R&D Sas Circulateur a membrane ondulante pilotee
DE102021205735A1 (de) 2021-06-08 2022-12-08 Robert Bosch Gesellschaft mit beschränkter Haftung Verfahren zum Ansteuern einer Pumpe, Verfahren zum Trainieren eines neurona-len Netzes und Fluid-Versorgungssystem

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4925371A (en) * 1987-12-17 1990-05-15 Dosapro Milton Roy Flow rate control for a variable stroke pump
US5314164A (en) * 1992-07-17 1994-05-24 Mks Instruments, Inc. Pivotal diaphragm, flow control valve
US5971723A (en) * 1995-07-13 1999-10-26 Knf Flodos Ag Dosing pump
US20030113218A1 (en) * 2000-03-10 2003-06-19 Heinrich Spreizer Metering pump

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2113315B (en) * 1982-01-11 1986-05-21 Hewlett Packard Co An improved high pressure meter pump
DE3801157A1 (de) * 1988-01-16 1989-08-03 Hagen W Dieter Elektronisch gesteuerte kolbendosierpumpe bzw. maschine
US4950134A (en) * 1988-12-27 1990-08-21 Cybor Corporation Precision liquid dispenser
DE19961852A1 (de) * 1999-12-22 2001-06-28 Continental Teves Ag & Co Ohg Pumpe mit geregeltem Ventil

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4925371A (en) * 1987-12-17 1990-05-15 Dosapro Milton Roy Flow rate control for a variable stroke pump
US5314164A (en) * 1992-07-17 1994-05-24 Mks Instruments, Inc. Pivotal diaphragm, flow control valve
US5971723A (en) * 1995-07-13 1999-10-26 Knf Flodos Ag Dosing pump
US20030113218A1 (en) * 2000-03-10 2003-06-19 Heinrich Spreizer Metering pump

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8430833B2 (en) * 2005-05-27 2013-04-30 Fresenius Medical Care Deutschland Gmbh Device and method for transporting medicinal liquids
US20090043239A1 (en) * 2005-05-27 2009-02-12 Alfred Gagel Device and method for transporting medicinal liquids
US7819642B2 (en) * 2006-08-24 2010-10-26 N.A.H. Zabar Ltd. Reciprocatory fluid pump
US20080050251A1 (en) * 2006-08-24 2008-02-28 N.A.H. Zabar Ltd. Reciprocatory fluid pump
US20090097986A1 (en) * 2006-08-30 2009-04-16 Daikin Industries, Ltd. Oil pressure unit and speed control method of motor in oil pressure unit
CH702437A1 (fr) * 2009-12-23 2011-06-30 Jean-Denis Rochat Pompe volumetrique alternative a membrane pour usage medical.
US20110189029A1 (en) * 2010-02-02 2011-08-04 Van De Velde Peter Hydraulic fluid control system for a diaphragm pump
US9850889B2 (en) * 2010-02-02 2017-12-26 Dajustco Ip Holdings Inc. Hydraulic fluid control system for a diaphragm pump
CN102762860A (zh) * 2010-02-18 2012-10-31 格伦德福斯管理联合股份公司 计量泵机组以及控制计量泵机组的方法
CN102859196A (zh) * 2010-03-24 2013-01-02 卓越剂量技术有限公司 用于控制和/或调节计量泵的方法
US20130240570A1 (en) * 2010-05-18 2013-09-19 Aktiebolaget Electrolux Battery-powered dosing device
US8899450B2 (en) * 2010-05-18 2014-12-02 Aktiebolaget Electrolux Battery-powered dosing device
US20120107150A1 (en) * 2010-11-02 2012-05-03 Bogdan Pawlak Radial Diaphragm Pump
US20140169985A1 (en) * 2011-07-28 2014-06-19 Ecolab Usa Inc. Diaphragm pump for dosing a fluid and an according method
CN103688053A (zh) * 2011-07-28 2014-03-26 艺康股份有限公司 用于计量流体的隔膜泵和相应方法
WO2013013725A1 (fr) * 2011-07-28 2013-01-31 Ecolab Inc. Pompe à membrane destinée à doser un fluide et procédé correspondant
US10280916B2 (en) * 2011-07-28 2019-05-07 Ecolab Usa Inc. Diaphragm pump for dosing a fluid and an according method
CN108374780A (zh) * 2018-05-10 2018-08-07 无锡市天利流体科技有限公司 高精度智能蠕动泵
US11118577B2 (en) * 2018-07-06 2021-09-14 Grundfos Holding A/S Metering pump and method for controlling a metering pump
CN110792581A (zh) * 2018-08-03 2020-02-14 罗伯特·博世有限公司 泵和用于泵的运行以及用于确定上和/或下止点的方法
WO2020044100A1 (fr) * 2018-08-27 2020-03-05 Saudi Arabian Oil Company Système de pompage
US11480163B2 (en) 2018-08-27 2022-10-25 Saudi Arabian Oil Company Pumping system with control features for controlling stroke duration and injection volume

Also Published As

Publication number Publication date
DE50211149D1 (de) 2007-12-13
WO2003054392A1 (fr) 2003-07-03
EP1456539A1 (fr) 2004-09-15
JP4060273B2 (ja) 2008-03-12
JP2005513340A (ja) 2005-05-12
EP1456539B1 (fr) 2007-10-31
ATE377149T1 (de) 2007-11-15
DE10162773A1 (de) 2003-07-10

Similar Documents

Publication Publication Date Title
US20040234377A1 (en) Dosing pump
CA2356342C (fr) Micropompe piezo-electrique
US5174731A (en) Method and arrangement for controlling a compressed air-operated double diaphragm pump
US9547293B2 (en) Control system for electromagnetic pumps
US5863187A (en) Two position rotary reciprocating pump with liquid displacement flow adjustment
KR880001922A (ko) 가변 변위 메커니즘을 구비한 경사판형 압축기
EP2523064A2 (fr) Appareil utilisant des soupapes à commande électronique
JP5827309B2 (ja) 定量ポンプの制御及び／又は調整方法
JPH0423114B2 (fr)
US6398514B1 (en) Double-acting rod pump
EP2944817A1 (fr) Dispositif de régulation de débit de décharge de pompe
EP3358181A1 (fr) Procédé et appareil permettant de commander la variation de position d'une came excentrique de moteurs hydrauliques à cylindrée variable
JPH04311685A (ja) 圧縮機
US5676527A (en) Air pump having an adjustable stroke
CN107787408B (zh) 变量泵及其调节方法
JP3117085B2 (ja) 容量可変型斜軸式液圧回転機
JPH02108871A (ja) 揺動斜板式圧縮機
JPH0567806B2 (fr)
KR101996066B1 (ko) 양경전 펌프
JP3088527B2 (ja) 容量可変型斜板式圧縮機
JP2000009244A (ja) 流量制御弁のスプール制御装置及び圧力制御弁の弁棒制御装置並びに油圧制御装置
SU1078127A1 (ru) Объемна машина
JPH11287344A (ja) エア駆動手段の自動スピードコントローラ及びこれを用いたエア駆動装置
JP2500629Y2 (ja) 容量可変型斜板式圧縮機
JPH0741978Y2 (ja) プロセス制御用調整弁の駆動機構

Legal Events

Date Code Title Description
AS Assignment

Owner name: KNF FLODOS AG, SWITZERLAND

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BOLT, ERWIN;REEL/FRAME:015657/0130

Effective date: 20040126

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION