US3832097A - Pump for concrete and other sludging materials - Google Patents

Pump for concrete and other sludging materials Download PDF

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Publication number
US3832097A
US3832097A US00313128A US31312872A US3832097A US 3832097 A US3832097 A US 3832097A US 00313128 A US00313128 A US 00313128A US 31312872 A US31312872 A US 31312872A US 3832097 A US3832097 A US 3832097A
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United States
Prior art keywords
pump
hopper
discharge pipe
cylinders
pump cylinders
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Expired - Lifetime
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US00313128A
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English (en)
Inventor
K Schlech
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Putzmeister Interholding GmbH
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Putzmeister Interholding GmbH
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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
    • 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
    • F04B7/0034—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 orbital movement, e.g. elbow-pipe type members
    • 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
    • F04B15/00—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F04B15/02—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous
    • F04B15/023—Pumps adapted to handle specific fluids, e.g. by selection of specific materials for pumps or pump parts the fluids being viscous or non-homogeneous supply of fluid to the pump by gravity through a hopper, e.g. without intake valve
    • 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

  • shaped discharge pipe is disposed in the inlet end facing in the same direction as the head ends of the cylinders.
  • the discharge pipe is oscillated to and fro about an axis above and parallel to the 6 O2 6 0 00 3 4 9 2 55 6 712 b 1 1 2 4 0% m E a s m W mam m W 1m2,9 u 4" t E a a n n u n mm s @A m m n mwus mm aad m m It mam?
  • the invention relates to a pump for concrete and other sludgy materials of the kind having two parallel pump cylinders projecting laterally from the bottom of a hopper or funnel and arranged to deliver the material from the hopper into a discharge pipe which has one of its ends connected to a delivery pipe and which is so mounted in a swivel bearing for movement about an axis substantially parallel to the axes of the pump cylinders that its other end is moved into register with the discharge ends of the two cylinders alternately.
  • the pump cylinders are connected to a rear wall of the hopper.
  • Swivelling discharge pipes of the aforementioned kind as used in known concrete pumps have approximately the form of a half wave-length of a planar sinusoidal oscillation between two successive peaks so that the axis of the delivery pipe connected to the outlet end of the discharge pipe is displaced longitudinally from, but is parallel to the axes of, the pump cylinders.
  • Such form and arrangement of a discharge pipe not only results in an undesirable increase in length in the overall structure of the pump, but also suffers from the disadvantage that the hopper cannot be charged from an end of the pump but has to be charged from the side, and this makes it difficult to operate a concrete pump in the constricted conditions usually encountered on building sites.
  • the object of the present invention is to Provide a concrete pump which can be made of compact design such as is required in particular in the case of mobile concrete pumps in which the end of the delivery pipe adjoining the swivelling discharge pipe connection with a delivery mast structure resting on the front part of the chassis.
  • the invention also enables the hopper to be charged without difficulty from the rear end of the vehicle, because a relatively low-level arrangement of the hopper can be achieved.
  • the invention may also facilitate removal and replacement of parts of the mechanism which are subject to heavy wear.
  • the delivery pipe is disposed above the pump cylinders and has its inlet end facing in the same direction as the open ends of the pump cylinders, and the discharge pipe is Cshaped and is disposed in the hopper, the upper end of the discharge pipe being connected to the delivery pipe and the lower end being connected to the two pump cylinders alternately.
  • the swivel bearing of the discharge pipe may be fitted either coaxially with or offcentre from the delivery pipe.
  • a further possible advantageous arrangement of the swivel bearing consists in positioning it on the lower face of a plate which is disposed over the hopper and which serves as a platform.
  • the upper end of the discharge pipe may conveniently be flanged to the delivery pipe with the aid of a quickaction torsion-resisting bolt system.
  • This part of the delivery pipe constituted by a rigid tube, can be connected, preferably by means of a rotary coupling, to the adjoining part of the delivery pipe secured to the vehicle superstructure.
  • a hydraulic actuator associated with each of the cylinders may be fitted on the hopper wall and spaced away from the pump cylinders, the piston of each of these hydraulic actuators acting on a pressure boss on the discharge pipe. If may be of advantage if these actuators act only indirectly on the slide pipe, this being achieved by said pistons acting on a transverse rail which is disposed within the hopper and along which slides the pressure, boss on the discharge pipe.
  • Pressure can alternatively be advantageously applied to the slide pipe by causing the ends of such transverse rail to be acted upon by tie rods which extend through the rear wall of the hopper and which are actuated by hydraulic or mechanical tensioning elements which are backed by the rear wall of the hopper.
  • the swivelling discharge pipe can be also pressed on to the open ends of the pump cylinders in a simple manner by utilizing the pressure applied to the working pistons of the pump force applied by the pressure fluid to the working pistons acts on the tie rods.
  • the portion of the hopper adjacent the rear wall may advantageously be covered by means of a horizontal plate, for example a close-meshed screen, serving as a platform, while the forward part of the hopper into which the concrete is charged is covered by means of a barred grating which may be replaceable and which holds back any oversize particles of additives.
  • a barred grating which may be replaceable and which holds back any oversize particles of additives.
  • at least one lug or projection may advantageously be provided on the discharge pipe and arranged to strike a corresponding stop on the grating, or the grating itself, just before the discharge pipe reaches its end position each time, and thus causes the grating, which may advantageously have slight play in its bearings, to vibrate.
  • a replaceable wear plate is preferably fitted on the inner face of the rear wall of the hopper in that zone by the lower end of the discharge pipe,
  • a replaceable ring made of a wear-resisting material can also be provided at the lower end of the discharge pipe, this ring also forming a continuous jointing element extending from the pump cylinder to the discharge pipe which may be of smaller diameter than the pump cylinder.
  • the cross-section of the discharge pipe may taper in the direction of delivery. If the main part of the delivery pipe has a still smaller cross-section, then the delivery pipe may have a section disposed adjacent the discharge pipe and having a continuously tapering crosssection. This section may advantageously be connected by means of a revolving coupling to the adjacent rigid main portion of the delivery pipe.
  • FIG. 1 is a longitudinal sectional view of a pump according to the invention
  • FIG. 2 shows a vertical section through the hopper on the line A-B of FIG. 1,
  • FIG. 3 is a view corresponding to FIG. 1 of a modifled construction
  • FIG. 4 is a sectional view on the line C-D of FIG. 3, and
  • FIG. 5 is another sectional elevation of the pump.
  • two pumps 1 each have a sleeve 16 having a flange 17 which is connected to a flanged element 9 secured to the rear wall 7 of a hopper 2.
  • a shaft carrying helical mixing blades 11 are mounted in the side walls of the hopper. These blades not only intensively mix the material but also direct it towards the adjacent open ends of the pump cylinders, which are located adjacent the centre line of the hopper.
  • the discharge pipe 4 is mounted in the hopper 2 to swing about a shaft 5, which may have a certain amount of axial play or may be of the universal joint type, to move into register with the adjacent ends of the two pump cylinders alternately.
  • the swinging move ment of the .discharge pipe 4 about the shaft 5 is achieved by means of pivotally mounted hydraulic cylinders 6, the pistons of which are linked with the ends of a rocker 45 embracing the delivery pipe 3.
  • the hopper 2 is closed at the bottom by means of a flap 22 which is mounted on a hinge 23 and which includes sealing strips 24 fitted in grooves. The flap 22 is pressed tightly on to the walls of the hopper with the aid of clamping means 25.
  • a horizontal plate 41 extends over the hopper and serves as a platform for the person supervising the charging of the hopper.
  • the hopper is charged through a rearwardly and downwardly inclined opening which is covered by a barred grating 43.
  • a stop piece 12 is welded on to the lower end part of the discharge pipe, and the piston of a hydraulic actuator 14 presses on to this stop either directly or by way of a transverse rail 13 which bears against the stop.
  • the piston of the hydraulic actuator 14 is preferably so controlled that it acts on the stop 12 only when the discharge pipe 4 is in its end positions.
  • the arrangement may be such that the lower end of the pipe 4 is lifted from the rear wall 7 of the hopper during the swinging movement.
  • a wear plate 15 is so fitted over this area of the rear wall that it can be readily replaced either laterally or when the flap 22 has been opened.
  • Hydraulic motor cylinders 18 for reciprocating the pump pistons are flanged on to the water tank 20 in the customary manner by means not illustrated in the drawing, and the rear ends of these cylinders are each closed by a cap 26.
  • the two cylinder caps may be interconnected by means of a transverse bar, not illustrated, and acted upon by intermediate plungers 27 mounted for axial displacement in the motor cylinders 18.
  • a tensile force can be applied to the stop 12 on the discharge pipe 4 by way of tie-rods, so that upon each compression stroke of a working piston of the pump cylinders, the required pressure is applied to the lower arm of the pipe-slide by way of the cylinder caps 26 and the rods similar to the tie-rods 21, which are employed in an alternative construction shown in FIG. 4.
  • the tapering delivery pipe 3 which is connected tov It will be understood that the pump pistons are out of place with each other and that during the backward stroke of one piston to draw concrete from the hopper into the pump cylinder through the open end thereof, the other pump piston is moving forward to discharge the concrete from its cylinder into the discharge pipe 4, which is disposed over the open cylinder end during this time.
  • the clamping means for the discharge pipe 4 is so designed that the transverse rail 13, along which the stop 12 on the pipe 4 slides when the latter is swung, is pressed against the stop 12 by way of tie-rods 21 and the clamping cylinders 30 fitted below the pump cylinders 1.
  • the tie-rods 21 are supported on the transverse rail 13 by screwed bolts 33 and have watertight seals at' the points where they pass through the rear wall 7 of the hopper 2.
  • the clamping cylinders 30 are supported on the flanges 9 by longitudinal supports 31, or directly on the rear wall 7 of the hopper.
  • the hydraulic cylinder 6 which imparts the swinging movement to the discharge pipe 4 is disposed substantially horizontally and has a lever which embraces the reducing tube 3 and is linked with the piston of the cylinder.
  • a platform 41 with a handrail is disposed above the hopper 2, this platform only overlying the hopper 2 to an extent such that the chute of a mobile concrete mixer can be moved into a position above the rearwardly and downwardly inclined charging orifice of the hopper, which orifice is covered by a barred grating 43.
  • Fitted on the discharge pipe 4 I is a lug 42 which, just before the slidepipe reaches either of its end positions, strikes a stop provided on the grating 43 and so causes the latter to vibrate.
  • the lower end of the discharge pipe 4 has a replaceable ring 44 as shown in FIG. 5 which is made of wearresisting material and which is widened out in the form of a cone in a direction towards the wear plate 15.
  • a pump for concrete and like sludgy material comprising a hopper, two parallel pump cylinders disposed side by side extending laterally from the hopper and opening at one end to the bottom of the hopper, pump pistons cyclically reciprocally mounted in the respective pump cylinders for drawing said material into said one end of the pump cylinders from the hopper and discharging the material back through said one end, a delivery pipe disposed above the pump cylinders and having an inlet end which faces in the same direction as the said ends of the pump cylinders, a C-shaped discharge pipe disposed in the hopper and having an upper and a lower end whereof the upper end is connected to said inlet end of the delivery pipe, means for oscillating the discharge pipe to and fro, about a pivot axis extending parallel to the pump cylinders, to bring the said lower end of the discharge pipe into register with the said ends of the two cylinders alternately to permit discharge from the pump chamber during the discharge portion of the cycle, and means for cyclically pressing and releasing the lower
  • a pump as claimed in claim 1 further comprising an inspection platform above the hopper, and a pivot mounting secured to the platform and supporting the discharge pipe to provide said pivot axis thereof.
  • a pump for concrete and like sludgy material comprising a hopper, two parallel pump cylinders disposed side by side extending laterally from the hopper and opening at one end to the bottom of the hopper, pump pistons reciprocatably mounted in the respective pump cylinders for drawing said material into said one end of the pump cylinders from the hopper and discharging the material back through said one end, a delivery pipe disposed above the pump cylinders and having an inlet end which faces in the same direction as the said ends of the pump cylinders, a C-shaped discharge pipe dis-.
  • a hydraulic piston and cylinder motor mounted on the hopper in general alignment with but spaced from said end of each of the pump cylinder, which motors are operable to press the lower end of the discharge pipe releasably against the said end of the pump cylinders aligned with the motors.
  • a pump for concrete and like sludgy material comprising a hopper, two parallel pump cylinders disposed side by side extending laterally from the hopper and opening at one end to the bottom of the hopper, pump pistons reciprocatably mounted in the respective pump cylinders for drawing said material into said one end of the pump cylinders from the hopper and discharging the material back through said one end, a delivery pipe disposed above the pump cylinders and having an inlet end which faces in the same direction as the said ends of the pump cylinders, a C-shaped discharge pipe disposed in the hopper and having an upper and a lower end whereof the upper end is connected to said inlet end of the delivery pipe, and means for oscillating the discharge pipe to and fro, about a pivot axis extending parallel to the pump cylinders, to bring the said lower end of the discharge pipe into register with the said ends of the two cylinders alternately, two actuators mounted externally of the hopper adjacent to the respective pump cylinders, two tie bars which are respectively connected to
  • a pump as claimed in claim 8 further comprising two piston and cylinder motors mounted on the other ends of and coaxially with the respective pump cylinders, which motors are connected to reciprocate the pump pistons, and wherein the actuators comprise auxiliary plungers projecting into the cylinder of the respective motors for actuation by pressure fluid supplied 'to the motors, a cross-member being provided which interconnects the plungers.
  • a pump for concrete and like sludgy material comprising a hopper two parallel pump cylinders disposed side by side extending laterally from the hopper and opening at one end to the bottom of the hopper, pump pistons reciprocatably mounted in the respective pump cylinders for drawing said material into said one end of the pump cylinders from the hopper and discharging the material back through said one end, a delivery pipe disposed above the pump cylinders and having an inlet end which'faces in the same direction as the said ends of the pump cylinders, a C-shaped discharge pipe disposed in the hopper and having an upper and a lower end whereof the upper end is connected to said inlet end of the delivery pipe, and means for oscillating the discharge pipe to and fro, about a pivot axis extending parallel to the pump cylinders, to bring the said lower end of the discharge pipe into register with the said ends of the two cylinders alternately, a cover in the form of a grating over the hopper, said grating having elements which are
  • a pump as claimed in claim 1 further comprising a wear plate which is mounted in the hopper and which is adapted to be swept by said lower end of the discharge pipe during the latters oscillatory movement.
  • a pump as claimed in claim 1 wherein the discharge pipe has a smaller diameter than the pump cylinders and has a conical end-ring secured on the lower end thereof, which end-ring increases in diameter in a direction towards the said ends of the pump cylinders.
  • said C- shaped discharge pipe includes an intermediate section between its upper and lower ends, the intermediate section inclining vertically towards the upper portion of the hopper rear wall, the upper and lower ends of said C-shaped section having openings facing rearwardly to provide a discharge path for material being handled which approximates from its inlet at the bottom of said C-shaped discharge pipe to the outlet at the top of said C-shaped discharge pipe.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating Pumps (AREA)
US00313128A 1971-12-16 1972-12-07 Pump for concrete and other sludging materials Expired - Lifetime US3832097A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE712162406A DE2162406C3 (de) 1971-12-16 1971-12-16 Schiebervorrichtung fur eine Pumpe mit zwei im Gegentakt arbeitenden Zylindern zum Fördern von Beton o.dgl

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US00313128A Expired - Lifetime US3832097A (en) 1971-12-16 1972-12-07 Pump for concrete and other sludging materials

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US (1) US3832097A (it)
JP (1) JPS5142323B2 (it)
AR (1) AR198296A1 (it)
AT (1) AT319761B (it)
AU (1) AU463434B2 (it)
BR (1) BR7208872D0 (it)
CA (1) CA956507A (it)
CH (1) CH561850A5 (it)
CS (1) CS170458B2 (it)
DE (1) DE2162406C3 (it)
ES (1) ES409813A1 (it)
FR (1) FR2163744B1 (it)
GB (1) GB1380476A (it)
IT (1) IT974061B (it)
SU (1) SU498917A3 (it)
ZA (1) ZA728641B (it)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3920357A (en) * 1974-03-13 1975-11-18 Case Co J I Pumping apparatus
US3929400A (en) * 1972-08-09 1975-12-30 Winget Ltd Slurry pumps
US3982857A (en) * 1973-10-17 1976-09-28 Karl Schlecht Support means for movable connector in concrete pump arrangement
DE2547639A1 (de) * 1975-10-24 1977-04-28 Schlecht Karl Trichter fuer betonpumpe
US4173436A (en) * 1977-06-03 1979-11-06 Maschinenfabrik Walter Scheele Kg Pivotable pipe slide for use in a two cylinder concrete pump
US4431386A (en) * 1980-12-05 1984-02-14 Elba-Werk Maschinen-Gesellschaft Mbh & Co. Concrete-pump assembly
US4502851A (en) * 1982-11-12 1985-03-05 Vaughn Calvin Pivotal discharge apparatus
US4569642A (en) * 1982-01-22 1986-02-11 Dwyer Anthony F Slurry pump
US4653990A (en) * 1984-05-26 1987-03-31 Karl Schlecht Positive double-piston displacement pump conveying pasteous material
EP0425086A1 (en) 1989-10-23 1991-05-02 Magneco/Metrel, Inc. Composition and method for manufacturing steel-containment equipment
US5422323A (en) * 1994-04-15 1995-06-06 Magneco/Metrel, Inc. Nonhazardous pumpable refractory insulating composition
EP0694619A3 (en) * 1994-07-26 1996-02-28 Magneco Metrel Inc Blast furnace delivery method
US5795508A (en) * 1991-03-22 1998-08-18 Magneco/Metrel, Inc. Method of lining a blast furnace
US5916500A (en) * 1997-11-20 1999-06-29 Magneco/Metrel, Inc. Method of lining a blast furnace
US6206662B1 (en) * 1997-06-11 2001-03-27 Schwing Gmbh Two-cylinder slurry pump
US6220834B1 (en) * 1998-02-09 2001-04-24 Putzmeister Aktiengesellschaft Support pipe for concrete pump with pivoting valve
US6280664B1 (en) * 1997-10-02 2001-08-28 Specialty Minerals ( Michigan) Inc. Method for installation of refractory material into a metallurgical vessel
EP1357240A1 (en) * 2002-01-08 2003-10-29 Construction Forms, Inc. Method and apparatus for a line concrete pumping system
US6758500B2 (en) 2002-04-19 2004-07-06 Construction Forms, Inc. Flared ends conduit coupling
USD788883S1 (en) * 2015-04-16 2017-06-06 Robert A Drake Pressure relief valve for use with concrete pumping system
US10900302B2 (en) 2018-07-27 2021-01-26 Country Landscapes & Tree Service, LLC Directional drilling systems, apparatuses, and methods

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JPS5529264B2 (it) * 1974-05-13 1980-08-02
JPS5526539Y2 (it) * 1974-12-09 1980-06-25
JPS5185504A (ja) * 1975-01-23 1976-07-27 Shogo Kato Konkuriitohonpu
JPS5294502A (en) * 1976-02-02 1977-08-09 Kyokuto Kaihatsu Kogyo Co Ltd Change-over device for supply port of concrete pump
DE2614895A1 (de) * 1976-04-07 1977-10-20 Schlecht Karl Beton-rohrweiche
DE2632816C2 (de) * 1976-07-21 1982-07-29 Friedrich Wilh. Schwing Gmbh, 4690 Herne Abdichtvorrichtung für eine Doppelzylinderpumpe, insbesondere für die Förderung von Beton
JPS5352181U (it) * 1976-10-06 1978-05-04
US4198193A (en) * 1978-05-12 1980-04-15 Walters James F Automatic wear compensation apparatus for concrete pumping hopper apparatus
DE2933128C2 (de) * 1979-08-16 1985-09-26 Friedrich Wilh. Schwing Gmbh, 4690 Herne Dickstoffpumpe, insbesondere zur Förderung von Beton
DE3118937C2 (de) * 1981-05-13 1985-05-23 Elba-Werk Maschinen-Gesellschaft Mbh & Co, 7505 Ettlingen Rohrverteiler für eine Hubkolbenpumpe
DE3045885C2 (de) * 1980-12-05 1984-05-30 Elba-Werk Maschinen-Gesellschaft Mbh & Co, 7505 Ettlingen Rohrverteiler für eine Hubkolbenpumpe
DE3122825C2 (de) * 1981-06-09 1984-11-08 Maschinenfabrik Walter Scheele GmbH & Co KG, 4750 Unna-Massen Vorrichtung zur Förderung von breiigen Massen, insbesondere Beton
JPS5844280A (ja) * 1981-09-08 1983-03-15 Kenji Kawase スラリ−ポンプ
DE3304985A1 (de) * 1983-02-12 1984-08-23 Rudolf Ing. Riker (grad.), 8940 Memmingen Pumpeneinheit fuer schwerfliessende stoffe, etwa beton
DE3347288A1 (de) * 1983-12-28 1985-07-18 Karl Dipl.-Ing. 7000 Stuttgart Schlecht Zweizylinder-pumpe, insbesondere zur foerderung von dickstoffen
FR2602709A1 (fr) * 1986-07-29 1988-02-19 Kinderstuth Daniel Benne autonome mobile avec pompe pour le beton ou le platre
CN1071390A (zh) * 1991-10-04 1993-04-28 三菱重工业株式会社 混凝土泵的闸阀装置
DE4344632A1 (de) * 1993-12-24 1995-06-29 Putzmeister Maschf Schiebervorrichtung für eine Zweizylinder-Dickstoffpumpe
DE10342338A1 (de) * 2003-09-11 2005-05-25 Putzmeister Ag Schiebervorrichtung für eine Dickstoffpumpe sowie Verschleißleiste hierfür
DE102005008938B4 (de) * 2005-02-26 2007-01-25 Schwing, Friedrich, Dipl.-Ing. Pumpvorrichtung und Verfahren zur kontinuierlichen Förderung breiiger Massen

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US25568A (en) * 1859-09-27 Improvement in methods of distilling oils from coal
US2796032A (en) * 1952-10-03 1957-06-18 Torkret Gmbh Piston pumps
US3181469A (en) * 1963-02-07 1965-05-04 Hydro Con Corp Concrete pumping apparatus
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US3331332A (en) * 1963-12-19 1967-07-18 Wennberg Olov Carl Gustav Piston pump for conveying concrete or other masses of similar consistency
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US3663129A (en) * 1970-09-18 1972-05-16 Leon A Antosh Concrete pump
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DE940869C (de) * 1951-04-08 1956-03-29 Gerhard Dr-Ing Beyer Kolbenpumpe zur Foerderung dickfluessiger Massen
FR1411359A (fr) * 1964-09-22 1965-09-17 Pompe à déplacement commandé pour transférer des matières semi-liquides
FR1496396A (fr) * 1966-10-11 1967-09-29 Dispositif de commande automatique pour pompe à béton

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Publication number Priority date Publication date Assignee Title
US25568A (en) * 1859-09-27 Improvement in methods of distilling oils from coal
US2796032A (en) * 1952-10-03 1957-06-18 Torkret Gmbh Piston pumps
US3181469A (en) * 1963-02-07 1965-05-04 Hydro Con Corp Concrete pumping apparatus
US3331332A (en) * 1963-12-19 1967-07-18 Wennberg Olov Carl Gustav Piston pump for conveying concrete or other masses of similar consistency
US3298322A (en) * 1966-04-20 1967-01-17 Robert T Sherrod Pump for semi-fluid materials
US3465685A (en) * 1968-02-21 1969-09-09 Eugene L Sherrod Self-clearing rotating conveyor
US3663129A (en) * 1970-09-18 1972-05-16 Leon A Antosh Concrete pump
US3726614A (en) * 1971-01-29 1973-04-10 Torkret Gmbh Pump construction

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3929400A (en) * 1972-08-09 1975-12-30 Winget Ltd Slurry pumps
US3982857A (en) * 1973-10-17 1976-09-28 Karl Schlecht Support means for movable connector in concrete pump arrangement
US3920357A (en) * 1974-03-13 1975-11-18 Case Co J I Pumping apparatus
DE2547639A1 (de) * 1975-10-24 1977-04-28 Schlecht Karl Trichter fuer betonpumpe
US4173436A (en) * 1977-06-03 1979-11-06 Maschinenfabrik Walter Scheele Kg Pivotable pipe slide for use in a two cylinder concrete pump
US4431386A (en) * 1980-12-05 1984-02-14 Elba-Werk Maschinen-Gesellschaft Mbh & Co. Concrete-pump assembly
US4569642A (en) * 1982-01-22 1986-02-11 Dwyer Anthony F Slurry pump
US4502851A (en) * 1982-11-12 1985-03-05 Vaughn Calvin Pivotal discharge apparatus
US4653990A (en) * 1984-05-26 1987-03-31 Karl Schlecht Positive double-piston displacement pump conveying pasteous material
EP0425086A1 (en) 1989-10-23 1991-05-02 Magneco/Metrel, Inc. Composition and method for manufacturing steel-containment equipment
US5795508A (en) * 1991-03-22 1998-08-18 Magneco/Metrel, Inc. Method of lining a blast furnace
US5422323A (en) * 1994-04-15 1995-06-06 Magneco/Metrel, Inc. Nonhazardous pumpable refractory insulating composition
EP0694619A3 (en) * 1994-07-26 1996-02-28 Magneco Metrel Inc Blast furnace delivery method
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Also Published As

Publication number Publication date
SU498917A3 (ru) 1976-01-05
DE2162406C3 (de) 1979-03-01
GB1380476A (en) 1975-01-15
AU463434B2 (en) 1975-07-08
CA956507A (en) 1974-10-22
ZA728641B (en) 1973-08-29
FR2163744B1 (it) 1977-09-02
DE2162406B2 (it) 1974-06-20
FR2163744A1 (it) 1973-07-27
JPS4866205A (it) 1973-09-11
BR7208872D0 (pt) 1973-12-11
AT319761B (de) 1975-01-10
DE2162406A1 (de) 1973-06-28
JPS5142323B2 (it) 1976-11-15
AU4968572A (en) 1974-06-06
CH561850A5 (it) 1975-05-15
IT974061B (it) 1974-06-20
ES409813A1 (es) 1975-11-16
CS170458B2 (it) 1976-08-27
AR198296A1 (es) 1974-06-14

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