EP0580018A1 - Concrete-conveying arrangement - Google Patents
Concrete-conveying arrangement Download PDFInfo
- Publication number
- EP0580018A1 EP0580018A1 EP93110822A EP93110822A EP0580018A1 EP 0580018 A1 EP0580018 A1 EP 0580018A1 EP 93110822 A EP93110822 A EP 93110822A EP 93110822 A EP93110822 A EP 93110822A EP 0580018 A1 EP0580018 A1 EP 0580018A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- concrete
- distribution system
- concrete distribution
- tube
- conveying
- 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.)
- Ceased
Links
- 229920002635 polyurethane Polymers 0.000 claims abstract description 8
- 239000004814 polyurethane Substances 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0427—Devices for both conveying and distributing with distribution hose on a static support, e.g. crane
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
- E04G21/0436—Devices for both conveying and distributing with distribution hose on a mobile support, e.g. truck
-
- 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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/0008—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using accumulators
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/85978—With pump
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/8593—Systems
- Y10T137/8807—Articulated or swinging flow conduit
Definitions
- the invention relates to a concrete distributor system consisting of a concrete feed pump, a connecting feed line to the multi-part concrete placing boom and a concrete feeding line integrated on the concrete placing boom, with an inside diameter greater than 75 mm and less than 250 mm.
- the concrete distribution system can be constructed both stationary on a construction site and as a mobile system, mounted on a truck.
- the invention sets itself the task of substantially reducing or avoiding the previous disadvantages in the known concrete distributor systems constructed according to DIN 24117.
- the concrete distribution system consists essentially of the concrete pump 1 with the hopper provided, the connecting conveyor line 2 to the multi-part concrete placing boom 3, which is usually an articulated boom, and from the concrete delivery line 4 integrated with the concrete placing boom with several articulation points 5 at the breakpoints of the Mastes.
- the pipe store 6 is designed so that it can be installed and removed in the same way as other pipe sections of the concrete delivery line. In the present case, it is integrated in the connecting conveyor line 2.
- the concrete distributor system can be installed as a mobile system on a truck or as a stationary system on a construction site.
- the tube store 6 is a welded composite construction and essentially consists of the multi-part outer steel tube 7 with quick-release couplings 8 at both ends and of the inner tube 9 made of polyurethane.
- the hardness of the polyurethane is said to be more than Shore D 27, which corresponds to a Shore A hardness of approximately 78.
- a cavity 10 remains between the outer steel tube 7 and the inner polyurethane tube 9, into which the tube can partially escape.
- the inner cone on both ends of the welded construction is kept flat and the inner contours of the steel ends and the hose are smooth without shoulders, so that so-called stoppers do not occur.
- the tube store 6 has a store length that is at least 10 times the inside diameter of the store.
- the steel parts that come into contact with the flowing concrete can be hardened to increase their service life.
Abstract
Description
Die Erfindung betrifft ein Betonverteilersystem bestehend aus einer Betonförderpumpe, einer Verbindungsförderleitung zum mehrteiligen Betonverteilermast und einer am Betonverteilermast integrierter Betonförderleitung, mit einem Innendurchmesser größer als 75 mm und kleiner als 250 mm.The invention relates to a concrete distributor system consisting of a concrete feed pump, a connecting feed line to the multi-part concrete placing boom and a concrete feeding line integrated on the concrete placing boom, with an inside diameter greater than 75 mm and less than 250 mm.
Das Betonverteilersystem kann sowohl stationär auf einer Baustelle als auch als mobiles System , montiert auf einem LKW, konstruiert sein.The concrete distribution system can be constructed both stationary on a construction site and as a mobile system, mounted on a truck.
Bei einem Betonverteilersystem gemäß dem Oberbegriff ist es erforderlich, bereits bei der Konstruktion Gestaltung der einzelnen Elemente den auftretenden Massenkräften beim Fördergang Rechnung zu tragen. Dieser Forderung wird bisher insoweit nachgekommen, als daß nach DIN 24117 Grundsätze festgelegt werden zur Berechnung von Verteilermasten für Betonpumpen, die in der Regel Kolbenpumpen sind. Wegen der Beanspruchung des Verteilermastes aus der stoßweisen Bewegung des Betons mit einer Rohdichte von bis zu = 2,40 kg/dm³ in den starren oder flexiblen Rohren sind die Werte der Betriebslasten mit 1,3 und die Eigenlasten mit 1,2 zu multiplizieren. Die Betriebslasten sind die maximalen Gewichtskräfte des Fördergutes in der Rohrleitung, das sich aus der Wahl der der Berechnung zugrunde liegendem Rohrleitungsabmessungen ergibt.In the case of a concrete distribution system according to the generic term, it is necessary to take into account the inertial forces that occur during the conveying process when designing the individual elements. This requirement has so far been met to the extent that, according to DIN 24117, principles are laid down for the calculation of placing booms for concrete pumps, which are usually piston pumps. Due to the stress on the placing boom from the intermittent movement of the concrete with a bulk density of up to = 2.40 kg / dm³ in the rigid or flexible pipes, the values of the operating loads have to be multiplied by 1.3 and the dead loads by 1.2. The operating loads are the maximum weight forces of the conveyed material in the pipeline, which results from the choice of the pipeline dimensions on which the calculation is based.
Die verpflichtende Erhöhung der Berechnungswerte um 20 % bzw. 30 % führt zwangsläufig zu mehr Gewicht und damit zu weniger Flexibilität der gesamten Systemkonstruktion und dies besonders bei mobilen Systemen.The mandatory increase of the calculation values by 20% or 30% inevitably leads to more weight and thus to less flexibility of the entire system construction, especially with mobile systems.
Die Erfindung setzt sich die Aufgabe, die bisherigen Nachteile bei den bekannten Betonverteilersystemen, konstruiert gemäß DIN 24117, wesentlich zu mindern bzw. zu vermeiden.The invention sets itself the task of substantially reducing or avoiding the previous disadvantages in the known concrete distributor systems constructed according to DIN 24117.
Die Aufgabe wird gelöst gemäß dem Kennzeichen des Hauptanspruchs. Die weitere Ausgestaltung des Erfindungsgegenstandes erfolgt nach den Kennzeichen der Unteransprüche.The object is achieved in accordance with the characteristic of the main claim. The further development of the subject matter of the invention takes place according to the characteristics of the subclaims.
Bei einem Betonverteilersystem, konstruiert gemäß der Erfindung, zeigt es sich als vorteilhaft, daß die Beanspruchung aus der stoßweisen Bewegung des Betons merklich bis meßbar zurückgeht. Es wird sich sogar ermöglichen lassen, den Vorschriftswert von 1,3 bezüglich des Betriebslastwertes zu reduzieren. Als ganz besonders vorteilhaft erweist sich, daß durch Einbau des Rohrspeichers als Pulsationsdämpfers der Pumpschlauch als Auslauf bedeutend weniger hin- und hergerissen wird. Dieses Hin- und Hergerissen werden des Endschlauches kann für den Mann am Schlauch, falls er auf einer schmalen Betonverschalung stehen muß, sehr gefährlich werden. Wegen der geringeren stoßweisen Bewegung des Betons in der Rohrleitung werden auch die Lager in den Knickpunkten des Betonverteilermastes geringer belastet und haben eine höhere Standzeit.In a concrete distribution system constructed according to the invention, it proves to be advantageous that the stress from the intermittent movement of the concrete decreases noticeably to measurably. It will even be possible to reduce the regulation value of 1.3 with respect to the operating load value. It proves to be particularly advantageous that, by installing the tube store as a pulsation damper, the pump hose as the outlet is torn much less to and fro. This tearing of the end hose can be very dangerous for the man on the hose if he has to stand on a narrow concrete casing. Due to the less intermittent movement of the concrete in the pipeline, the bearings in the breakpoints of the concrete placing boom are also less stressed and have a longer service life.
Ausführungsbeispiele der Erfindung sind in den Zeichnungen dargestellt:
- Fig. 1:
- ein Betonverteilersystem mit Rohrspeicher
- Fig. 2:
- der Rohrspeicher im Schnitt
- Fig. 1:
- a concrete distribution system with pipe storage
- Fig. 2:
- the pipe storage on average
Nach Fig. 1 besteht das Betonverteilersystem im wesentlichen aus der Betonpumpe 1 mit dem vorgesehenen Einfülltrichter, der Verbindungsförderleitung 2 zum mehrteiligen Betonverteilermast 3, der in der Regel ein Knickmast ist, und aus der am Betonverteilermast integrierten Betonförderleitung 4 mit mehreren Gelenkpunkten 5 an dem Knickpunkten des Mastes. Der Rohrspeicher 6 ist so konstruiert, daß er in gleicher Weise ein- und ausgebaut werden kann, wie andere Rohrabschnitte der Betonförderleitung. Im vorliegenden Fall ist er in die Verbindungsförderleitung 2 integriert. Das Betonverteilersystem kann sowohl als mobiles System auf einem LKW oder als stationäres System auf einer Baustelle montiert sein.According to Fig. 1, the concrete distribution system consists essentially of the
Der Rohrspeicher 6 ist eine Schweißverbundkonstruktion und besteht im wesentlichen aus dem mehrteiligen äußeren Stahlrohr 7 mit Schnellkupplungen 8 an beiden Enden und aus dem innen liegenden Schlauch 9 aus Polyurethan. Die Härte des Polyurethans soll mehr als Shore D 27 betragen, was einer Shore A Härte von ungefähr 78 entspricht. Zwischen dem äußeren Stahlrohr 7 und dem inneren Polyurethanschlauch 9 verbleibt ein Hohlraum 10, in den der Schlauch teilweise ausweichen kann. Der Anlagekonus innen an beiden Enden der Schweißkonstruktion ist jeweils flach gehalten und die Innenkonturen der Stahlenden sowie des Schlauches sind glatt ohne Absätze, damit sogenannte Stopper nicht auftreten.The
Es ist vorteilhaft, wenn der Rohrspeicher 6 eine Speicherlänge aufweist, die mindestens das 10-fache des Speicherinnendurchmessers beträgt.It is advantageous if the
Zur Erhöhung der Standzeit können die Stahlteile, die mit dem fließenden Beton in Berührung kommen, gehärtet werden.The steel parts that come into contact with the flowing concrete can be hardened to increase their service life.
- 11
- Betonpumpeconcrete pump
- 22nd
- VerbindungsförderleitungConnection conveyor line
- 33rd
- BetonverteilermastConcrete placing boom
- 44th
- BetonförderleitungConcrete delivery line
- 55
- GelenkpunktHinge point
- 66
- RohrspeicherPipe storage
- 77
- äußeres Stahlrohrouter steel tube
- 88th
- SchnellkupplungQuick coupling
- 99
- Schlauch (Polyurethan)Hose (polyurethane)
- 1010th
- Hohlraumcavity
Claims (7)
dadurch gekennzeichnet,
daß in der Betonförderleitung (2,4) als separater Rohrabschnitt ein Rohrspeicher (6) angeordnet ist.Concrete distribution system consisting of a concrete delivery pump, a connection delivery line to the multi-part concrete distribution boom, the concrete distribution boom and a concrete delivery line integrated on the concrete distribution boom with an inside diameter greater than 75 mm and less than 250 mm,
characterized,
that a pipe store (6) is arranged in the concrete delivery line (2,4) as a separate pipe section.
dadurch gekennzeichnet,
daß der Rohrspeicher (6) aus einem äußeren Stahlrohr (7) mit Schnellkupplungen (8) an beiden Enden und aus einem innen-liegenden Schlauch (9) aus Polyurethan besteht, wobei zwischen dem äußeren Stahlrohr (7) und dem innenliegenden Polyurethanschlauch (9) ein Hohlraum (10) verbleibt.Concrete distribution system according to claim 1,
characterized,
that the tube store (6) consists of an outer steel tube (7) with quick-release couplings (8) at both ends and an inner tube (9) made of polyurethane, the outer steel tube (7) and the inner polyurethane tube (9) a cavity (10) remains.
dadurch gekennzeichnet,
daß der Schlauch (9) eine Härte von größer, gleich Shore D 27 aufweist.Concrete distribution system according to claims 1 and 2,
characterized,
that the hose (9) has a hardness greater than or equal to Shore D 27.
dadurch gekennzeichnet,
daß der Schlauch in seiner Länge unterschiedliche Shore-Härten aufweist.Concrete distribution system according to claims 1 to 3,
characterized,
that the hose has different Shore hardness in its length.
dadurch gekennzeichnet,
daß die Speicherlänge im Verhältnis zum Schlauchinnendurchmesser Di/L größer als 1:10 ist.Concrete distribution system according to claims 1 to 4,
characterized,
that the storage length in relation to the inner tube diameter Di / L is greater than 1:10.
daß der Rohrspeicher (6) eine Schweißverbundkonstruktion ist, wobei Anhang und Ende des Polyurethanschlauches (10) mit der Schweißverbundkonstruktion verklebt sind.Concrete distribution system according to claims 1 to 5,
that the tube store (6) is a welded composite construction, the attachment and end of the polyurethane hose (10) being glued to the welded composite construction.
dadurch gekennzeichnet,
daß die mit dem Beton in Berührung kommenden Stahlteile gehärtet sind.Concrete distribution system according to claims 1 to 6,
characterized,
that the steel parts coming into contact with the concrete are hardened.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4224162A DE4224162A1 (en) | 1992-07-22 | 1992-07-22 | Concrete distribution system |
| DE4224162 | 1992-07-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0580018A1 true EP0580018A1 (en) | 1994-01-26 |
Family
ID=6463824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93110822A Ceased EP0580018A1 (en) | 1992-07-22 | 1993-07-07 | Concrete-conveying arrangement |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US5351716A (en) |
| EP (1) | EP0580018A1 (en) |
| JP (1) | JPH06158862A (en) |
| DE (1) | DE4224162A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0726392A1 (en) * | 1995-02-10 | 1996-08-14 | TURBOSOL PRODUZIONE S.p.A. | Machine for pumping building materials |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100541118B1 (en) * | 1997-06-05 | 2006-03-03 | 두산인프라코어 주식회사 | Composite pipe for transfering concrete |
| KR100584876B1 (en) * | 1997-11-25 | 2007-04-19 | 두산인프라코어 주식회사 | Combined structure of feed tube and steel boss made of composite material |
| WO2004101992A1 (en) * | 2003-05-12 | 2004-11-25 | Putzmeister Inc. | Filament-wound composite boom pipe |
| JP4253802B2 (en) * | 2004-12-28 | 2009-04-15 | 清水建設株式会社 | Boom vibration suppression device for concrete pump car with boom |
| DE102007034067B9 (en) | 2007-07-20 | 2009-05-14 | Arthur Habermann Gmbh & Co. Kg | Ready-mixed concrete plant with polyurethane concrete hose |
| CN101949217B (en) * | 2010-09-27 | 2012-07-25 | 山东德建集团有限公司 | Pump pipe buffer for transmitting concrete |
| US20140103698A1 (en) * | 2012-10-17 | 2014-04-17 | Bo Feng | Horizontally rotatable multi-knuckle boom |
| WO2014121306A1 (en) * | 2013-01-31 | 2014-08-07 | Dao Huan | Combination of concrete spreader and crane tower |
| DE102017223240A1 (en) * | 2017-12-19 | 2019-06-19 | Putzmeister Engineering Gmbh | Concrete pump mast arm segment with longitudinally variable plate thickness and method of making such a concrete pump mast arm segment |
| US20230151624A1 (en) | 2021-11-12 | 2023-05-18 | EZ Placer, LLC | Mobile concrete distribution system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3649138A (en) * | 1970-03-04 | 1972-03-14 | Ireco Chemicals | Pump apparatus for slurry and other viscous liquids |
| DE3544368A1 (en) * | 1985-12-14 | 1987-06-19 | Korthaus Ernst | Pressure damper |
| US4936383A (en) * | 1988-04-22 | 1990-06-26 | Ico-Texaust Joint Venture, Inc. | Downhole pump pulsation dampener |
Family Cites Families (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2478326A (en) * | 1945-12-17 | 1949-08-09 | Phillips Petroleum Co | Pipe-line transportation of fine solids |
| US2609001A (en) * | 1947-06-13 | 1952-09-02 | Phillips Petroleum Co | Surge absorbing chamber |
| US3103234A (en) * | 1961-02-08 | 1963-09-10 | Beloit Iron Works | Fluid flow surge dampening system |
| US3353560A (en) * | 1964-12-14 | 1967-11-21 | Mac Bee Engineering Inc | Pulsation damping device |
| DE2114716C3 (en) * | 1971-03-26 | 1974-12-12 | Walter Dipl.-Ing. 4600 Dortmund Saltenberger | Tower crane with concrete delivery line |
| US3707990A (en) * | 1971-01-11 | 1973-01-02 | Case Co J I | Concrete placement apparatus |
| DE7215038U (en) * | 1972-04-20 | 1973-07-19 | Beton Spritz Maschinen Gmbh & Co | SPRAY MACHINE FOR CONCRETE MOERTEL OR SIMILAR GOODS |
| JPS533433B2 (en) * | 1972-11-28 | 1978-02-06 | ||
| US3874417A (en) * | 1973-05-24 | 1975-04-01 | Robert B Clay | Pneumatic pump surge chamber |
| US4163571A (en) * | 1977-07-18 | 1979-08-07 | Durapipe Limited | Pipe couplings |
| NL7805960A (en) * | 1978-06-01 | 1979-12-04 | Tot Exploit Betonmortel | INSTALLATION AND METHOD FOR THE PURPOSING OF CONCRETE AND A NOZZLE FOR THIS. |
| SU887381A1 (en) * | 1979-11-01 | 1981-12-07 | Краматорский Индустриальный Институт | Pneumatic transport system pipeline |
| DE3000141C2 (en) * | 1980-01-04 | 1984-06-14 | Werner 7129 Talheim Heyberger | Hydraulic device with two chambers separated from one another by a deformable membrane |
| DE3301332A1 (en) * | 1983-01-17 | 1984-07-19 | Industrielle Planungs- und Marketing-Anstalt, Vaduz | Device for protection of liquid lines against detonations |
| JPS63223264A (en) * | 1987-03-13 | 1988-09-16 | 清水建設株式会社 | Apparatus for preventing closure of concrete pressure feed system |
| JPS63297667A (en) * | 1987-05-28 | 1988-12-05 | 三和産業株式会社 | Pressure feed apparatus |
| DE3735081A1 (en) * | 1987-10-16 | 1989-04-27 | Klaus Obermann | Pressure-pulsation damper for flow media |
| SU1618889A1 (en) * | 1988-03-31 | 1991-01-07 | Белгородский технологический институт строительных материалов им.И.А.Гришманова | Shotcreting machine |
| DE3910189A1 (en) * | 1989-03-29 | 1990-10-04 | Schwing Gmbh F | TWO-CYLINDER FUEL PUMP WITH PISTON ACCUMULATOR |
| JPH0326272A (en) * | 1989-06-23 | 1991-02-04 | Shoko Kagaku Kenkyusho:Kk | Gradual releasing material |
| JPH047321U (en) * | 1990-05-07 | 1992-01-23 | ||
| JPH0438268A (en) * | 1990-06-01 | 1992-02-07 | Toyoda Mach Works Ltd | Hydraulic control valve gear |
| JPH0431406U (en) * | 1990-07-06 | 1992-03-13 |
-
1992
- 1992-07-22 DE DE4224162A patent/DE4224162A1/en not_active Withdrawn
-
1993
- 1993-07-07 EP EP93110822A patent/EP0580018A1/en not_active Ceased
- 1993-07-21 JP JP5180097A patent/JPH06158862A/en active Pending
- 1993-07-22 US US08/095,007 patent/US5351716A/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3649138A (en) * | 1970-03-04 | 1972-03-14 | Ireco Chemicals | Pump apparatus for slurry and other viscous liquids |
| DE3544368A1 (en) * | 1985-12-14 | 1987-06-19 | Korthaus Ernst | Pressure damper |
| US4936383A (en) * | 1988-04-22 | 1990-06-26 | Ico-Texaust Joint Venture, Inc. | Downhole pump pulsation dampener |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0726392A1 (en) * | 1995-02-10 | 1996-08-14 | TURBOSOL PRODUZIONE S.p.A. | Machine for pumping building materials |
Also Published As
| Publication number | Publication date |
|---|---|
| DE4224162A1 (en) | 1994-01-27 |
| JPH06158862A (en) | 1994-06-07 |
| US5351716A (en) | 1994-10-04 |
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