EP1003969B1 - Zweizylinder-dickstoffpumpe - Google Patents

Zweizylinder-dickstoffpumpe Download PDF

Info

Publication number
EP1003969B1
EP1003969B1 EP98945133A EP98945133A EP1003969B1 EP 1003969 B1 EP1003969 B1 EP 1003969B1 EP 98945133 A EP98945133 A EP 98945133A EP 98945133 A EP98945133 A EP 98945133A EP 1003969 B1 EP1003969 B1 EP 1003969B1
Authority
EP
European Patent Office
Prior art keywords
cylinder
distributor sleeve
slurry pump
openings
housing
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.)
Expired - Lifetime
Application number
EP98945133A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1003969A1 (de
Inventor
Friedrich Schwing
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.)
Friedrich Wilhelm Schwing GmbH
Original Assignee
Friedrich Wilhelm Schwing 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 Friedrich Wilhelm Schwing GmbH filed Critical Friedrich Wilhelm Schwing GmbH
Publication of EP1003969A1 publication Critical patent/EP1003969A1/de
Application granted granted Critical
Publication of EP1003969B1 publication Critical patent/EP1003969B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • F04B7/0019—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers
    • F04B7/0026—Piston machines or pumps characterised by having positively-driven valving a common distribution member forming a single discharge distributor for a plurality of pumping chambers and having an oscillating movement
    • 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
    • F04B7/0038—Piston machines or pumps characterised by having positively-driven valving the distribution member forming a single inlet for a plurality of pumping chambers or a multiple discharge for one single pumping chamber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/90—Slurry pumps, e.g. concrete

Definitions

  • the invention relates to a two-cylinder slurry pump according to the Preamble of claim 1.
  • Two-cylinder thick matter pumps consist of two single pumps interconnected in terms of circuitry and in their movement are synchronized so that when pumping one Cylinder (Z1) the other cylinder (Z2) performs a suction stroke.
  • the stroke speeds of the pistons are usually in the two cylinders the same, so that the temporal ends of the cylinder strokes (Suction stroke and pump stroke) coincide.
  • the direction of movement of the cylinder pistons is reversed, so that there is a constant change between pumping and suction strokes he follows.
  • the suction stroke is used to remove thick matter such as concrete from a prefill container to promote the respective suction cylinder.
  • Pump current is the previously sucked material from the now pumping cylinder pressed into the delivery line.
  • control elements or changeover valves for example Pipe switches or flat slide - provided, which itself move back and forth between two switching positions to the correct connection between the cylinder openings, the Connect the delivery line and the pre-fill tank.
  • Pipe switches as currently the most common control units are generally. arranged so that they go between two switching end positions are pivotable in which they have the necessary connection between the cylinder openings, the delivery line connection and the prefill container.
  • the pipe switch is included one end constantly connected to the delivery line while the other end each the cylinder opening of the pumping straight Cylinder covered.
  • the cylinder opening of the suction cylinder stands thus open to the prefill container.
  • the flow interruptions can have further negative effects extend further.
  • the effect often occurs that the sucked thick matter compressible due to an air or gas content is.
  • the thick material With the start of the pump stroke, the thick material must then first pre-compressed to the operating pressure in the delivery line before the flow begins.
  • the need for pre-compression can also be neglected be small.
  • the piston speeds in the delivery cylinders dimensioned differently, e.g. becomes the suction speed chosen so much larger than the pumping speed that the Suction stroke is ended so early that in the remaining time until At the end of the pump stroke, the pipe switch is swiveled up to can be used for the middle position between the two cylinders.
  • Several phases are run through, the first of which is the cylinder opening of the cylinder that previously sucked by means of a Shut-off element is closed, so that the under pressure Do not flow standing concrete back into the pre-fill container at any stage can.
  • By closing the cylinder opening is also a pre-compression of the thick matter in the cylinder on the operating pressure in the delivery line possible.
  • a Another swing phase is the opening of the previously sucking Cylinder, while the pump stroke of the other cylinder, also connected to the delivery line.
  • this position pump standby position
  • the pump stroke In this position (pump standby position) remains with the precompressed thick matter filled cylinders to the end of Pump strokes and then starts without time delay and without pressure drop in the delivery line, in turn, the pump stroke, while the First opening of the previously pumping cylinder in a third Phase is closed by means of a further shut-off element (to avoid a short circuit).
  • the opening of this cylinder to the prefill container is released and the cylinder or piston of this cylinder begins its suction stroke, again at a higher speed than that of the running pump stroke. Closes at the end of the suction stroke with the pump stroke still running in the opposite direction a new switching process of the pipe switch.
  • each feed cylinder to control the Suction and pump current while avoiding backflow and each with its own pipe switch while enabling pre-compression assigned.
  • the exit ends the pipe switches lead into a downpipe, the Outlet is connected to the delivery line.
  • This pump is especially with regard to their width, the construction effort (two pipe switches, i.e. twice the cost of materials) and energy consumption (double energy expenditure for the two rotary actuators the pipe switches) in need of improvement.
  • the invention therefore aims to be a continuously promoting Two-cylinder thick matter pump with little design effort to accomplish.
  • the pipe switch in the usual way in Arrange the bottom area of the prefill container and the pipe switch assign the function to the pump (pressure) flow from the cylinders to lead to the delivery line.
  • the invention is surprising here another way, because it arranges the pipe switch between the suction side of the feed cylinder and the suction line and separates the prefill container functionally from the pipe switch housing.
  • the invention thus realizes a simple and compact Pipe switch to control a continuous flow of thick matter. So the pipe switch according to the invention requires the cylinder openings on it brushing end with only a circular opening the diameter of the suction line.
  • the invention also provides a particularly compact arrangement, where the diverter in a very small separate housing is arranged, which has a "minimal" geometry, so to speak, in which the side lengths of the housing are only slightly longer than the diameter of the line and cylinder openings.
  • the Housing is under constant pressure, with the cavity between the outer contour of the pipe switch and the inner contour of the Housing acts simply as a pressure line and the connects each pumping cylinder to the delivery line.
  • DE AS 1653 614 wants this state of the art improve that they have a rotary valve for a slurry pump creates, where it is not temporarily interrupted of the material flow comes.
  • the cup-like valve body connects a pre-fill container to one of the cylinders. It is the widest in the cup-like valve body Senses around a "pipe switch" arranged on the suction side.
  • the present invention provides the generic thick matter pump on the other hand with a changeover valve, the pipe switch on the suction side connected and with it a continuous pumping is feasible.
  • this is due to the additional Shut-off element for closing the suction line and / or the first and / or second openings of the diverter housing with which can reliably prevent thick matter from entering the suction line or can even flow back into the prefill container. This measure is just not known from DE 1 653 614.
  • DE 1 653 614 Another problem of DE 1 653 614 is the fact that the valve shown is heavy and extremely expensive. Also for this reason the idea of DE 1 653 614, i.e. the Thought of a pipe switch on the suction side, never to realize one continuously pump.
  • Fig. 1 shows a section of a two-cylinder thick matter pump for continuous conveyance of thick matter, especially for continuous Conveying concrete (dotted), which two (only partially shown here) delivery cylinders 1, 2 for delivery of concrete from a suction line 3 into a delivery line 4 having.
  • the switching valve 5 has a separate - i.e. its own, from the pre-fill container 7 structurally separate - pipe switch housing 8 with at least four openings a, b, c, d, the first and the second opening a and b to the first and the second feed cylinder 1, 2, the third opening c to the suction line 3 and the fourth opening d is connected to the delivery line 4.
  • the pipe switch housing 8 also has a stepped base part 81, in which the third opening c is recessed and into which the suction line 3 opens, a subsequent cylindrical base body 82, in the peripheral wall of which the openings a and b are recessed, and a conical lid portion 83 in which the opening d is recessed and to which the delivery line 4 is connected.
  • the inlet opening RE (in the direction indicated by the arrow S Flow direction of the concrete) of the L-shaped pipe switch 6 opens in third opening c of the switch gate housing 8 and is fixed to the Suction line 3 connected.
  • the outlet opening RA of the pipe switch 6 is, however, between the first and second openings a, b to Connection of the delivery cylinders 1, 2 (or these upstream pipe sections) pivotable.
  • one Drive shaft 9 is provided, to which a (not shown) Drive unit can be connected.
  • a Cavity H formed which acts as a pressure line between the each pumping delivery cylinder 1, 2 and the delivery line 4 is used and which is constantly under pressure during pumping.
  • An arc piece 11 with two arcuate extensions 12, 13 on both sides the diverter outlet opening RA is such to the diverter 6 integrally formed that a shut-off element 10 forms, which at Twisting the pipe switch 6 on the inner wall of the cylindrical Section 82 abuts and also the outlet openings a or b to Release or close connection of cylinders 1, 2.
  • FIG. 1 differs from the embodiment of FIG Fig. 3 essentially in that instead of the elbow 11 as Shut-off element, a gate valve 14 is arranged in the suction line 3 is.
  • the slide 14 represents another constructive and structural Simplification of the invention because it eliminates the need to form the elbow 11. Also the seal the slide 14 turns out to be less complicated than the seal of the bow piece 11.
  • the use of the slide 14 results in a further one constructive advantage.
  • the embodiment of Fig. 3 may be the optimal one for a variety of concrete types Realization of the invention because the pipe switch housing 8 and the diverter 6 are to a minimal size (in the area the pipe diameter) and few uncomplicated components limited.
  • Fig. 5 shows an embodiment analogous to Fig. 1, in which however, instead of an L-shaped diverter 6, an S-shaped one Pipe switch 6 'is used.
  • Pipe switch housing shaped it almost fits the S shape in its Outer contour on and tapers from a flat cover section 801 from in the area of a quasi "conical" housing section 802.
  • the openings a, b are recessed and in Housing section 802 are the openings c and d for the delivery line intended.
  • section 802 tapers to the outside diameter the pipe switch or the diameter of the opening d for connection the suction line 3.
  • the lid section 801 is used by several (e.g. 10 or more) ribs 15 which stabilize between the lid portion 801 and the drive shaft 9 are formed.
  • a shut-off element in FIG. 5 is again used "Arch piece" 11 '(see also Fig. 6), which here as a flat Disc arch is formed and in turn on both sides of the Pipe switch outlet opening RA has extensions 12 'and 13'.
  • the Drive shaft 9 in turn rotates the diverter 6 and that molded elbow piece 11 '.
  • FIG. 7 corresponds in its structure largely the embodiment of FIG. 5, because it will again an S-shaped pipe switch was used. Similar to FIG. 3 but is instead of an arch element 11 'as a shut-off element again the gate valve 14 is arranged in the suction line 3. It there are again the advantages of saving a more complex Shut-off element in an arch shape and easier sealing.
  • the operation of the concrete pump or the changeover valve takes over the idea of different piston speeds of the sucking and the pumping delivery cylinder 1, 2.
  • the Suction speed in turn, so much greater than that Pump speed selected so that the suction stroke is ended so early that already in the remaining time until the end of the pump stroke the pivoting of the diverter 6 can begin.
  • FIG. 6a Cylinder opening of the delivery cylinder 2 (previously a suction stroke had already carried out) from an extension 12 'of the arch piece 11 'covered, the pipe switch outlet opening RA is from Cover section 801 closed. This prevents that the concrete from the cylinder 2 into the suction line 3 or Pre-fill container 7 can flow back.
  • Cylinder opening b By closing the Cylinder opening b also pre-compresses cylinder 2 located thick matter on the prevailing in the delivery line 4 Operating pressure possible.
  • the other cylinder is pumping still thick matter through the pipe switch housing 8 in the delivery line 4th
  • the delivery cylinder 2 starts from its pump-ready position without time delay and without pressure drop in the delivery line 4 in turn the pump stroke, while the opening a of the previously pumping cylinder 1 in the third phase by means of Extension 13 'of the shut-off element 11' is closed (Fig. 6c).
  • the pipe switch outlet opening is also still closed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Fuel-Injection Apparatus (AREA)
EP98945133A 1997-08-13 1998-07-31 Zweizylinder-dickstoffpumpe Expired - Lifetime EP1003969B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19735091A DE19735091B4 (de) 1997-08-13 1997-08-13 Zweizylinder-Dickstoffpumpe
DE19735091 1997-08-13
PCT/EP1998/004808 WO1999009315A1 (de) 1997-08-13 1998-07-31 Zweizylinder-dickstoffpumpe

Publications (2)

Publication Number Publication Date
EP1003969A1 EP1003969A1 (de) 2000-05-31
EP1003969B1 true EP1003969B1 (de) 2002-06-19

Family

ID=7838861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98945133A Expired - Lifetime EP1003969B1 (de) 1997-08-13 1998-07-31 Zweizylinder-dickstoffpumpe

Country Status (15)

Country Link
US (1) US6450779B1 (ja)
EP (1) EP1003969B1 (ja)
JP (1) JP2001515180A (ja)
KR (1) KR100402197B1 (ja)
CN (1) CN1104558C (ja)
AT (1) ATE219554T1 (ja)
AU (1) AU727999B2 (ja)
BR (1) BR9811171A (ja)
CA (1) CA2299391C (ja)
DE (2) DE19735091B4 (ja)
ES (1) ES2180197T3 (ja)
HK (1) HK1027149A1 (ja)
RU (1) RU2193110C2 (ja)
TR (1) TR200000345T2 (ja)
WO (1) WO1999009315A1 (ja)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005008938A1 (de) * 2005-02-26 2006-08-31 Schwing, Friedrich, Dipl.-Ing. Pumpvorrichtung und Verfahren zur kontinuierlichen Förderung breiiger Massen
DE102005024174A1 (de) * 2005-05-23 2006-12-07 Schwing, Friedrich, Dipl.-Ing. Verfahren zum Steuern einer Pumpvorrichtung zur Förderung breiiger Massen sowie Steuerung einer Pumpvorrichtung zur Förderung breiiger Massen
WO2010081695A1 (de) 2009-01-16 2010-07-22 Friedrich Schwing Verfahren zur förderung breiiger massen und pumpvorrichtung zur förderung breiiger massen

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19957337A1 (de) 1999-11-29 2001-05-31 Hudelmaier Joerg Dickstoffpumpe
US20060193738A1 (en) * 2005-02-26 2006-08-31 Friedrich Schwing Pump apparatus and method for continuously conveying a viscous material
WO2007111689A2 (en) * 2005-11-08 2007-10-04 Good Earth Tools, Inc. Sealing rings for abrasive slurry pumps
JP2007291857A (ja) * 2006-04-20 2007-11-08 Nidec Sankyo Corp 定量ポンプ装置
CN100392247C (zh) * 2006-04-25 2008-06-04 甄继 可实现连续出料的混凝土泵送方法及混凝土泵送装置
CN101787973B (zh) * 2010-02-09 2011-11-09 三一重工股份有限公司 混凝土泵用分配阀、混凝土泵及其控制方法和混凝土泵车
CN102720671B (zh) * 2012-06-21 2014-12-03 中矿(天津)环保设备有限公司 膏状体物料高压输送方法和膏状体物料高压输送泵
DE102012107933B4 (de) * 2012-08-28 2017-09-21 Götz Hudelmaier Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms sowie Verfahren zum Betrieb einer Dickstoffpumpe zur Erzeugung eines kontinuierlichen Dickstoffstroms
AU2015332105B2 (en) * 2014-10-13 2019-06-20 Alfa S.R.L. Positive-displacement pump and pumping group for fluid products and method for the use thereof
DE202016000790U1 (de) * 2016-02-08 2016-03-18 Ralf Hannibal Schlauchquetschpumpe mit einem Schwenkantrieb und einer Rohrweiche
US10900302B2 (en) 2018-07-27 2021-01-26 Country Landscapes & Tree Service, LLC Directional drilling systems, apparatuses, and methods
CN110409833B (zh) * 2019-07-16 2021-04-02 江西鑫通机械制造有限公司 一种湿喷机的控制方法

Family Cites Families (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE165614C (ja) *
CH8986A (fr) 1894-07-17 1895-02-28 Limited Pneumatic Tyre Company Jante de roue avec pneumatique, perfectionnée
US3146721A (en) * 1960-08-08 1964-09-01 Schwing Friedrich Wilhelm Hydraulic piston pump for the pumping of viscous pulpy or plastic substances
DE1653614B2 (de) * 1967-06-10 1974-06-27 Bobbie Ray Oklahoma City Okla.(V.St.A.) Smith Drehschieberventil für eine Schlammpumpe, z.B. Betonpumpe
IL33922A (en) 1969-03-03 1973-08-29 M & T Chemicals Inc Rodenticide compositions containing silatrane compounds
DE1963875C3 (de) * 1969-12-20 1975-10-23 Friedrich Dipl.-Ing. 4680 Wanne-Eickel Schwing Kolbenpumpe mit hydraulischem Antrieb zum Fördern von Beton
US3663129A (en) * 1970-09-18 1972-05-16 Leon A Antosh Concrete pump
DE2235586A1 (de) * 1972-07-20 1974-02-07 Wibau Gmbh Steuerschieber einer zweikolbenpumpe zur foerderung von baustoffmischungen, insbesondere von zementbeton
IT989402B (it) 1973-06-22 1975-05-20 Italiana Forme Acciaio Valvola distributrice a 4 vie per pompe a pistoni per calce struzzo
US3963385A (en) * 1975-05-05 1976-06-15 Caban Angel M Valve assembly for concrete pumps
CH601668A5 (ja) * 1977-02-04 1978-07-14 Schaffner Pumpenanlagen Ag
US4303378A (en) * 1977-09-22 1981-12-01 Thomsen Equipment Company Concrete pump
JPS5581282A (en) * 1978-12-13 1980-06-19 Kyokuto Kaihatsu Kogyo Co Ltd Transfer device for induction unit of concrete pump
DE2909964A1 (de) * 1979-03-14 1980-09-25 Schwing Gmbh F Dickstoffpumpe, insbesondere fuer beton
JPS56572A (en) * 1979-06-14 1981-01-07 Kyokuto Kaihatsu Kogyo Co Ltd Concrete pump
JPS6028181B2 (ja) * 1979-06-28 1985-07-03 日本電気株式会社 円筒式フアクシミリ装置の記録針回転機構
US4580954A (en) * 1983-05-23 1986-04-08 Boyle Bede Alfred Oscillating-deflector pump
DE3421371A1 (de) * 1984-06-08 1985-12-12 TEKA Maschinenbau GmbH, 6732 Edenkoben Ventillose doppelzylinderpumpe
IT1223184B (it) * 1987-11-30 1990-09-19 Tetra Dev Co Unita' pompante
US5263828A (en) * 1989-03-29 1993-11-23 Friedrich Wilh. Schwing Gmbh Two-cylinder thick matter pump having a piston storage
DE4120466A1 (de) * 1990-07-03 1992-01-09 Putzmeister Maschf Materialaufgabebehaelter fuer zweizylinder-dickstoffpumpen
US5281113A (en) * 1990-11-16 1994-01-25 Friedrich Wilh, Schwing Gmbh Thick materials pump with paired, preferably parallel feed cylinders which alternatingly deliver and intake
US5330327A (en) * 1993-04-27 1994-07-19 Schwing America, Inc. Transfer tube material flow management

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005008938A1 (de) * 2005-02-26 2006-08-31 Schwing, Friedrich, Dipl.-Ing. Pumpvorrichtung und Verfahren zur kontinuierlichen Förderung breiiger Massen
DE102005008938B4 (de) * 2005-02-26 2007-01-25 Schwing, Friedrich, Dipl.-Ing. Pumpvorrichtung und Verfahren zur kontinuierlichen Förderung breiiger Massen
DE102005024174A1 (de) * 2005-05-23 2006-12-07 Schwing, Friedrich, Dipl.-Ing. Verfahren zum Steuern einer Pumpvorrichtung zur Förderung breiiger Massen sowie Steuerung einer Pumpvorrichtung zur Förderung breiiger Massen
WO2010081695A1 (de) 2009-01-16 2010-07-22 Friedrich Schwing Verfahren zur förderung breiiger massen und pumpvorrichtung zur förderung breiiger massen
DE102009005318B3 (de) * 2009-01-16 2010-09-30 Schwing, Friedrich, Dipl.-Ing. Verfahren zur Förderung breiiger Massen und Pumpvorrichtung zur Förderung breiiger Massen

Also Published As

Publication number Publication date
WO1999009315A1 (de) 1999-02-25
TR200000345T2 (tr) 2000-05-22
DE19735091B4 (de) 2006-03-02
RU2193110C2 (ru) 2002-11-20
DE19735091A1 (de) 1999-04-29
HK1027149A1 (en) 2001-01-05
KR100402197B1 (ko) 2003-10-22
JP2001515180A (ja) 2001-09-18
CN1265724A (zh) 2000-09-06
EP1003969A1 (de) 2000-05-31
DE59804530D1 (de) 2002-07-25
AU727999B2 (en) 2001-01-04
ATE219554T1 (de) 2002-07-15
KR20010022811A (ko) 2001-03-26
ES2180197T3 (es) 2003-02-01
AU9256798A (en) 1999-03-08
CN1104558C (zh) 2003-04-02
BR9811171A (pt) 2000-07-25
CA2299391A1 (en) 1999-02-25
CA2299391C (en) 2006-10-24
US6450779B1 (en) 2002-09-17

Similar Documents

Publication Publication Date Title
EP1003969B1 (de) Zweizylinder-dickstoffpumpe
EP0561262B1 (de) Dickstoffpumpe mit Förderzylindern, insbesondere Zweizylinderbetonpumpe
EP2002121B1 (de) Kolbenpumpe für dickstoffe
EP1725770A1 (de) Kolben-dickstoffpumpe
EP1718866A1 (de) Kolben-dickstoffpumpe
WO2010081695A1 (de) Verfahren zur förderung breiiger massen und pumpvorrichtung zur förderung breiiger massen
EP0465474B1 (de) Steuerungsanordnung für eine zweizylinder-dickstoffpumpe
DE4200305A1 (de) Regelbare fluegelzellenpumpe in kompakter bauweise
DE10343802B4 (de) Kolben-Dickstoffpumpe mit kontinuierlichem Förderstrom
EP1235982B1 (de) Dickstoffpumpe
DE102005024174A1 (de) Verfahren zum Steuern einer Pumpvorrichtung zur Förderung breiiger Massen sowie Steuerung einer Pumpvorrichtung zur Förderung breiiger Massen
DE4209471A1 (de) Dickstoffpumpe für Förderzylindern, insbesondere Zweizylinderbetonpumpe
DE3605935A1 (de) Kompressor mit einem mechanismus zur verringerung von pulsierenden druckschwankungen
DE19854473A1 (de) Zweistufenschneckenkompressor
DE2835590A1 (de) Dreiwege-verteilerventil fuer eine betonpumpe mit zwei zylindern
EP0197402B1 (de) Vorrichtung zur Förderung von Dickstoffsuspensionen und Verfahren zu ihrem Betrieb
DE3219882A1 (de) Betonpumpe
EP0364519A1 (de) Mehrzylinder-kolbenpumpe
DE102005008938B4 (de) Pumpvorrichtung und Verfahren zur kontinuierlichen Förderung breiiger Massen
WO2007147586A1 (de) Zweizylinder-dickstoffpumpe mit zwei rohrweichen
EP0767119B1 (de) Dichtplatte für die Dichtung einer Rotorstufe
DE102019127388A1 (de) Fluidversorgung von Unterflügelkammern einer Flügelzellenpumpe
EP3894701B1 (de) Kolbenpumpe und verfahren zum betrieb einer kolbenpumpe
WO2020083605A1 (de) Kontinuierlich fördernde kolbenpumpe
EP0194431A1 (de) Kraftstoffhochdruck-Einspritzvorrichtung an Brennkraftmaschinen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20000121

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE ES FR GB GR IT

17Q First examination report despatched

Effective date: 20010502

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE ES FR GB GR IT

REF Corresponds to:

Ref document number: 219554

Country of ref document: AT

Date of ref document: 20020715

Kind code of ref document: T

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REF Corresponds to:

Ref document number: 59804530

Country of ref document: DE

Date of ref document: 20020725

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20020912

REG Reference to a national code

Ref country code: GR

Ref legal event code: EP

Ref document number: 20020403118

Country of ref document: GR

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2180197

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20030320

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20070725

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20070723

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20070730

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20070726

Year of fee payment: 10

Ref country code: DE

Payment date: 20070927

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20070718

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GR

Payment date: 20070730

Year of fee payment: 10

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20080731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090203

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080731

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090331

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090204

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080731

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080731

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080731

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20080801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080801