EP0563519B1 - Device for mixing and conveying - Google Patents
Device for mixing and conveying Download PDFInfo
- Publication number
- EP0563519B1 EP0563519B1 EP93101040A EP93101040A EP0563519B1 EP 0563519 B1 EP0563519 B1 EP 0563519B1 EP 93101040 A EP93101040 A EP 93101040A EP 93101040 A EP93101040 A EP 93101040A EP 0563519 B1 EP0563519 B1 EP 0563519B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mixing
- rocker
- conveying device
- supporting frame
- belt drive
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0806—Details; Accessories
- B28C5/0831—Drives or drive systems, e.g. toothed racks, winches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
Definitions
- the invention relates to a mixing and conveying device, in particular for mortar or concrete as material to be conveyed, with a supporting frame, a fixed mixing vessel, a preferably fixed drive motor designed as a diesel engine, and a rotating motor in the mixing vessel arranged about an essentially horizontal axis, via the drive motor and transmission means Drivable agitator, which gear means have a belt drive arranged between an output shaft of the drive motor and a cardan shaft connected to the agitator via a cardan joint, and a tensioning and coupling device for the belt drive.
- Mixing and conveying devices of this type are used in the construction industry for mixing and conveying thick materials such as mortar, screed, concrete or the like.
- the mixed material which consists for example of sand and a binder, is fed to the mixing kettle through the addition of water through a filling opening. There, the mix is thoroughly mixed while the agitator is running. After completion of the mixture, the mix and conveyed material are conveyed through a conveying line under the influence of compressed air.
- the gear unit contains a cardan shaft to move the air intake of the diesel engine as far as possible from the filler opening of the mixing tank. Since alternating forces act on the cardan shaft via the agitator, especially when the agitator is immersed in the granular mix and conveyed material arise, devices of this type often cause vibrations, which lead to considerable noise and to an undesirable alternating material load.
- the object of the invention is to improve the known mixing and conveying device of the type specified at the outset in such a way that automatic tensioning and coupling of the belt drive is ensured and undesirable vibrations are nevertheless avoided.
- the tensioning and coupling device has a cardan shaft bearing that is pivotable at a distance from the universal joint about an axis essentially parallel to the cardan shaft at a pivot point of the supporting frame Rocker and a combined spring and damping member clamped between the support frame and rocker.
- the combined spring and damping member is designed as a cylinder housing with a displaceable plunger gas spring damper which is articulated at one end to the support frame and at the other end to the rocker each outside the rocker pivot.
- the gas spring element of the gas spring damper has the advantage of a largely constant spring characteristic. This ensures that there is always a constant pretensioning force on the belt even when the V-belt is elongated.
- the rocker pivot point and the articulation points of the combined gas spring damper expediently span a common plane.
- the rocker according to the invention can be pivoted against the spring force of the combined spring and damping element, preferably via reduction means, to disengage and engage the belt drive.
- the reduction means are expediently formed by a lever-actuated cam, the cam being rotatably mounted on the support frame about a horizontal axis which is substantially perpendicular to the propeller shaft.
- the damping force of the damping element of the combined spring and damping element is at least three times, preferably five to ten times the clamping force exerted by the spring element.
- the mixing and conveying device is prevented from swinging up, for example, by a nozzle through which liquid flows, which opposes an increased resistance to the impact of the acting movement in the event of an impact load.
- a slow movement such as is triggered during the uncoupling process, the liquid can flow through the nozzle almost unhindered.
- the mixing and conveying device shown schematically in the drawing essentially consists of a support frame 10, a frame-fixed mixing container 12, a frame-fixed drive motor 14, for example a diesel engine, and an agitator 16 which is arranged in the mixing container 12 and can be rotated about a horizontal axis and which has a reduction gear 18, a universal joint 20 and a substantially horizontal cardan shaft 22 and a V-belt drive 24 can be driven by means of the drive motor 14.
- the smaller pulley 26 of the V-belt drive 24 is rotatably connected to the motor shaft 28, while the larger pulley 30 is arranged on the free end of the cardan shaft 22 opposite the universal joint.
- the V-belt 32 of the V-belt drive 22 is tensioned via a tensioning and coupling device which contains a rocker 40 articulated on a pivot point 36 of the support frame 10, which has a cardan shaft bearing 38 and a combined gas spring damper 46 clamped between a frame-fixed pivot point 42 and a rocker-fixed pivot point 44.
- the cylinder 48 of the gas spring damper is connected to the pivot point 42 fixed to the frame and the tappet 50 is connected to the pivot point 44 fixed to the rocker.
- the tensioning and coupling device 34 also contains a cam plate 52 which acts on the rocker 60, Via a lever 54 manually operable clutch, via which the belt drive 24 can be uncoupled by lifting the pulley 30 against the spring force of the gas spring damper 46.
- the invention relates to a mixing and conveying device, in particular for mortar or concrete as conveyed material.
- the mixing and conveying device essentially consists of a support frame 10, a mixing tank 12 which is fixed to the frame, a drive motor 14 which is preferably designed as a diesel engine, and a drive motor 14 which is arranged in the mixing tank 12 so as to be rotatable about a substantially horizontal axis, via the drive motor 14 and transmission means 18, 20, 22, 24 driven stirrer 16.
- the gear means have a belt drive 24 arranged between a motor shaft 28 and a cardan shaft 22 connected to the stirrer and a tensioning and coupling device 34 for the belt drive 24.
- the tensioning and coupling device 34 can be pivoted about an axis parallel to the cardan shaft 22 on the support frame 10 at a distance from the universal joint 20 arranged, a cardan shaft bearing 38 rocker 40 and a combined gas spring damper 46 clamped between the support frame 10 and rocker 40.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
- Processing Of Solid Wastes (AREA)
- Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
Abstract
Description
Die Erfindung betrifft ein Misch- und Fördergerät, insbesondere für Mörtel oder Beton als Fördergut, mit einem Traggestell, einem gestellfesten Mischkessel, einem vorzugsweise als Dieselmotor ausgebildeten gestellfesten Antriebsmotor und einem im Mischkessel um eine im wesentlichen horizontale Achse drehbar angeordneten, über den Antriebsmotor und Getriebemittel antreibbaren Rührwerk, welche Getriebemittel einen zwischen einer Abtriebswelle des Antriebsmotors und einer über ein Kardangelenk mit dem Rührwerk verbundenen Kardanwelle angeordneten Riementrieb sowie eine Spann- und Kupplungsvorrichtung für den Riementrieb aufweisen.The invention relates to a mixing and conveying device, in particular for mortar or concrete as material to be conveyed, with a supporting frame, a fixed mixing vessel, a preferably fixed drive motor designed as a diesel engine, and a rotating motor in the mixing vessel arranged about an essentially horizontal axis, via the drive motor and transmission means Drivable agitator, which gear means have a belt drive arranged between an output shaft of the drive motor and a cardan shaft connected to the agitator via a cardan joint, and a tensioning and coupling device for the belt drive.
Misch- und Fördergeräte dieser Art dienen in der Bauindustrie zur Mischung und Förderung von Dickstoffen, wie Mörtel, Estrich, Beton oder dergleichen. Das beispielsweise aus Sand und einem Bindemittel bestehende Mischgut wird unter Wasserzugabe über eine Einfüllöffnung dem Mischkessel zugeführt. Dort wird bei laufendem Rührwerk das Mischgut gründlich durchgemischt. Nach Fertigstellung der Mischung wird das Misch- und Fördergut unter der Einwirkung von Druckluft durch eine Förderleitung gefördert. Die Getriebemittel enthalten eine Kardanwelle, um die Luftansaugung des Dieselmotors soweit wie möglich von der Einfüllöffnung des Mischkessels wegzuverlegen. Da auf die Kardanwelle über das Rührwerk Wechselkräfte wirken, die vor allem beim Eintauchen des Rührwerks in das körnige Misch- und Fördergut entstehen, kommt es bei Geräten dieser Art häufig zu Vibrationen, die zu einer erheblichen Geräuschbildung und zu einer unerwünschten Material-Wechselbelastung führen.Mixing and conveying devices of this type are used in the construction industry for mixing and conveying thick materials such as mortar, screed, concrete or the like. The mixed material, which consists for example of sand and a binder, is fed to the mixing kettle through the addition of water through a filling opening. There, the mix is thoroughly mixed while the agitator is running. After completion of the mixture, the mix and conveyed material are conveyed through a conveying line under the influence of compressed air. The gear unit contains a cardan shaft to move the air intake of the diesel engine as far as possible from the filler opening of the mixing tank. Since alternating forces act on the cardan shaft via the agitator, especially when the agitator is immersed in the granular mix and conveyed material arise, devices of this type often cause vibrations, which lead to considerable noise and to an undesirable alternating material load.
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, das bekannte Misch- und Fördergerät der eingangs angegebenen Art dahingehend zu verbessern, daß eine selbsttätige Spannung und Kupplung des Riementriebs gewährleistet ist und trotzdem unerwünschte Vibrationserscheinungen vermieden werden.Proceeding from this, the object of the invention is to improve the known mixing and conveying device of the type specified at the outset in such a way that automatic tensioning and coupling of the belt drive is ensured and undesirable vibrations are nevertheless avoided.
Zur Lösung dieser Aufgabe wird gemäß der Erfindung die im Patentanspruch 1 angegebene Merkmalskombination vorgeschlagen. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.To achieve this object, the combination of features specified in
Die erfindungsgemäße Lösung geht vor allem von dem Gedanken aus, daß der mittels eines Federelements gespannte Riementrieb durch ein mit dem Federelement kombiniertes Dämpfungsglied mit einfachen Mitteln daran gehindert wird, daß die vom Mischer kommenden stoßförmigen Wechselbelastungen zu einem unerwünschten Aufschwingen des Geräts führen können. Um dies zu erreichen, wird gemäß der Erfindung vorgeschlagen, daß die Spann- und Kupplungsvorrichtung eine im Abstand vom Kardangelenk um eine zur Kardanwelle im wesentlichen parallele Achse an einem Drehpunkt des Traggestells schwenkbar angeordnete, ein Kardanwellenlager tragende Wippe sowie ein zwischen Traggestell und Wippe eingespanntes kombiniertes Feder- und Dämpfungsglied aufweist.The solution according to the invention is primarily based on the idea that the belt drive tensioned by means of a spring element is prevented with simple means by a damping member combined with the spring element from the fact that the shock-like alternating loads coming from the mixer can lead to an undesirable swinging up of the device. In order to achieve this, it is proposed according to the invention that the tensioning and coupling device has a cardan shaft bearing that is pivotable at a distance from the universal joint about an axis essentially parallel to the cardan shaft at a pivot point of the supporting frame Rocker and a combined spring and damping member clamped between the support frame and rocker.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, daß das kombinierte Feder- und Dämpfungsglied als ein Zylindergehäuse mit verschiebbarem Stößel aufweisender Gasfederdämpfer ausgebildet ist, der an seinem einen Ende am Traggestell und an seinem anderen Ende an der Wippe jeweils außerhalb des Wippendrehpunkts angelenkt ist. Das Gasfederelement des Gasfederdämpfers hat den Vorteil einer weitgehend konstanten Federcharakteristik. Dadurch wird gewährleistet, daß auch bei Längung des Keilriemens immer eine konstante Vorspannkraft am Riemen anliegt.An advantageous embodiment of the invention provides that the combined spring and damping member is designed as a cylinder housing with a displaceable plunger gas spring damper which is articulated at one end to the support frame and at the other end to the rocker each outside the rocker pivot. The gas spring element of the gas spring damper has the advantage of a largely constant spring characteristic. This ensures that there is always a constant pretensioning force on the belt even when the V-belt is elongated.
Um eine gleichmäßige Kraftverteilung innerhalb der Spann- und Kupplungsvorrichtung zu gewährleisten, spannen der Wippendrehpunkt und die Gelenkstellen des kombinierten Gasfederdämpfers zweckmäßig eine gemeinsame Ebene auf.In order to ensure an even distribution of force within the tensioning and coupling device, the rocker pivot point and the articulation points of the combined gas spring damper expediently span a common plane.
Die erfindungsgemäße Wippe kann zum Aus- und Einkuppeln des Riementriebs vorzugsweise über Untersetzungsmittel entgegen der Federkraft des kombinierten Feder- und Dämpfungsglieds verschwenkt werden. Die Untersetzungsmittel sind dabei zweckmäßig durch eine hebelbetätigte Kurvenscheibe gebildet, wobei die Kurvenscheibe um eine zur Kardanwelle im wesentlichen senkrechte Horizontalachse am Traggestell drehbar gelagert ist. Mit dem Dämpfungselements des Gasfederdämpfers wird dabei erreicht, daß das Einkuppeln nicht schlagartig, sondern verzögert und sanft erfolgt.The rocker according to the invention can be pivoted against the spring force of the combined spring and damping element, preferably via reduction means, to disengage and engage the belt drive. The reduction means are expediently formed by a lever-actuated cam, the cam being rotatably mounted on the support frame about a horizontal axis which is substantially perpendicular to the propeller shaft. With the Damping element of the gas spring damper is achieved that the clutch is not suddenly, but is delayed and gentle.
Um bei gegebener Spannkraft von beispielsweise 1000 N eine ausreichende Dämpfungswirkung zu erhalten, beträgt die Dämpfungskraft des Dämpfungselements des kombinierten Feder- und Dämpfungsglieds mindestens das Dreifache, vorzugsweise das Fünf- bis Zehnfache der durch das Federelement ausgeübten Spannkraft.In order to obtain a sufficient damping effect for a given clamping force of, for example, 1000 N, the damping force of the damping element of the combined spring and damping element is at least three times, preferably five to ten times the clamping force exerted by the spring element.
Mit dem erfindungsgemäßen Feder- und Dämpfungsglied wird ein Aufschwingen des Misch- und Fördergeräts beispielsweise durch eine flüssigkeitsdurchströmte Düse verhindert, die bei einer stoßförmigen Belastung der einwirkenden Bewegung einen erhöhten Widerstand entgegensetzt. Bei einer langsamen Bewegung, wie sie beispielsweise beim Entkupplungsvorgang ausgelöst wird, kann die Flüssigkeit dagegen nahezu ungehindert durch die Düse hindurchströmen. Durch die Verwendung des kombinierten Feder- und Dämpfungsglieds wird eine kompakte Anordnung der betreffenden Wirkglieder und ein minimaler Montageaufwand erzielt.With the spring and damping element according to the invention, the mixing and conveying device is prevented from swinging up, for example, by a nozzle through which liquid flows, which opposes an increased resistance to the impact of the acting movement in the event of an impact load. In contrast, with a slow movement, such as is triggered during the uncoupling process, the liquid can flow through the nozzle almost unhindered. By using the combined spring and damping element, a compact arrangement of the relevant active elements and a minimal installation effort is achieved.
Im folgenden wird die Erfindung anhand eines in der Zeichnung in schematischer Weise dargestellten Ausführungsbeispiels näher erläutert. Es zeigen
- Fig. 1
- eine Seitenansicht eines Misch- und Fördergeräts für Dickstoffe;
- Fig. 2
- eine Stirnseitenansicht des Misch- und Fördergeräts ohne Mischkessel.
- Fig. 1
- a side view of a mixing and conveying device for thick matter;
- Fig. 2
- an end view of the mixing and conveying device without a mixing vessel.
Das in der Zeichnung schematisch dargestellte Misch- und Fördergerät besteht im wesentlichen aus einem Traggestell 10, einem gestellfesten Mischbehälter 12, einem gestellfesten, beispielsweise als Dieselmotor ausgebildeten Antriebsmotor 14 sowie einem im Mischbehälter 12 um eine horizontale Achse drehbar angeordneten Rührwerk 16, das über ein Untersetzungsgetriebe 18, ein Kardangelenk 20 und eine im wesentlichen horizontale Kardanwelle 22 sowie einen Keilriementrieb 24 mit Hilfe des Antriebsmotors 14 antreibbar ist. Die kleinere Riemenscheibe 26 des Keilriementriebs 24 ist mit der Motorwelle 28 drehfest verbunden, während die größere Riemenscheibe 30 an dem dem Kardangelenk gegenüberliegenden freien Ende der Kardanwelle 22 angeordnet ist. Der Keilriemen 32 des Keilriementriebs 22 wird über eine Spann- und Kupplungsvorrichtung gespannt, die eine an einem Drehpunkt 36 des Traggestells 10 angelenkte, ein Kardanwellenlager 38 aufweisende Wippe 40 sowie einen zwischen einem gestellfesten Drehpunkt 42 und einem wippenfesten Drehpunkt 44 eingespannten kombinierten Gasfederdämpfer 46 enthält. Bei dem gezeigten Ausführungsbeispiel ist der Zylinder 48 des Gasfederdämpfers mit dem gestellfesten Drehpunkt 42 und der Stößel 50 mit dem wippenfesten Drehpunkt 44 verbunden. Weiter enthält die Spann- und Kupplungsvorrichtung 34 einen mit einer Kurvenscheibe 52 auf die Wippe 60 einwirkende, über einen Hebel 54 von Hand betätigbare Kupplung, über die der Riementrieb 24 durch Anheben der Riemenscheibe 30 entgegen der Federkraft des Gasfederdämpfers 46 entkuppelt werden kann.The mixing and conveying device shown schematically in the drawing essentially consists of a
Zusammenfassend ist folgendes festzustellen: Die Erfindung bezieht sich auf ein Misch- und Fördergerät, insbesondere für Mörtel oder Beton als Fördergut. Das Misch- und Fördergerät besteht im wesentlichen aus einem Traggestell 10 einem gestellfesten Mischkessel 12, einem vorzugsweise als Dieselmotor ausgebildeten Antriebsmotor 14 und einem im Mischkessel 12 um eine im wesentlichen horizontale Achse drehbar angeordneten, über den Antriebsmotor 14 und Getriebemittel 18,20,22, 24 antreibbaren Rührwerk 16. Die Getriebemittel weisen eine zwischen einer Motorwelle 28 und einer mit dem Rührwerk verbundenen Kardanwelle 22 angeordneten Riementrieb 24 sowie eine Spann- und Kupplungsvorrichtung 34 für den Riementrieb 24 auf. Um bei möglichst kompakter Anordnung eine gute Stoßdämpfung und trotzdem eine ausreichende Spannung des Riementriebs zu gewährleisten, wird gemäß der Erfindung vorgeschlagen, daß die Spann- und Kupplungsvorrichtung 34 eine im Abstand vom Kardangelenk 20 um eine zur Kardanwelle 22 im wesentlichen parallele Achse am Traggestell 10 schwenkbar angeordnete, ein Kardanwellenlager 38 tragene Wippe 40 sowie einen zwischen Traggestell 10 und Wippe 40 eingespannten kombinierten Gasfederdämpfer 46 aufweist.In summary, the following can be stated: The invention relates to a mixing and conveying device, in particular for mortar or concrete as conveyed material. The mixing and conveying device essentially consists of a
Claims (7)
- Mixing and conveying device, in particular for mortar or concrete as a material to be conveyed, having a supporting frame (10), a frame-fixed mixing tank (12), a driving motor (14) preferably in the form of a diesel motor and an agitator (16), which is disposed in the mixing tank so as to be rotatable about a substantially horizontal axis and is drivable by means of the driving motor (14) and transmission means (18, 20, 22, 24), said transmission means comprising a belt drive (24), which is disposed between an output shaft (28) of the driving motor (14) and a cardan shaft (22) connected by a cardan joint (20) to the agitator, as well as a tightening and coupling device (34) for the belt drive (24),
characterized in that the tightening and coupling device (34) comprises a rocker (40), which is disposed at a distance from the cardan joint (20) so as to be capable of swivelling about an axis substantially parallel to the cardan shaft (22) at a point of rotation (36) of the supporting frame (10) and carries a cardan shaft bearing (38), as well as a combined spring and damping element (46) which is clamped between supporting frame (10) and rocker. - Mixing and conveying device according to claim 1, characterized in that the combined spring and damping element takes the form of a pneumatic spring damper (46), which comprises a cylinder housing (48) with a plunger (50) and is coupled by its one end (42) to the supporting frame (10) and by its other end (44) to the rocker (40) in each case outside of the rocker point of rotation (36).
- Mixing and conveying device according to claim 1 or 2, characterized in that the rocker point of rotation (36) and the hinge points (42, 44) of the combined pneumatic spring damper (46) define a common plane.
- Mixing and conveying device according to one of claims 1 to 3, characterized in that the rocker (40) for disengaging the belt drive (24) may be swivelled preferably by speed reduction means (52) counter to the spring action of the combined spring and damping element (46).
- Mixing and conveying device according to claim 4, characterized in that the speed reduction means are formed by a lever-operated cam plate (52, 54).
- Mixing and conveying device according to claim 5, characterized in that the cam plate (52) is supported so as to be rotatable about a horizontal axis substantially perpendicular to the cardan shaft (22) on the supporting frame (10).
- Mixing and conveying device according to one of claims 1 to 6, characterized in that the damping force of the damping element of the combined spring and damping element (46) is at least three times, preferably five to ten times, the tension force exerted by its spring element.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4210430 | 1992-03-30 | ||
| DE4210430A DE4210430A1 (en) | 1992-03-30 | 1992-03-30 | Mixing and conveying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0563519A1 EP0563519A1 (en) | 1993-10-06 |
| EP0563519B1 true EP0563519B1 (en) | 1996-05-08 |
Family
ID=6455447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP93101040A Expired - Lifetime EP0563519B1 (en) | 1992-03-30 | 1993-01-23 | Device for mixing and conveying |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0563519B1 (en) |
| AT (1) | ATE137701T1 (en) |
| DE (2) | DE4210430A1 (en) |
| ES (1) | ES2087575T3 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1120216B1 (en) | 2000-01-27 | 2006-05-24 | Kaeser Kompressoren GmbH | Method and apparatus for mixing and discharging of concrete |
| DE102007051409B4 (en) | 2007-10-25 | 2014-08-21 | Putzmeister Mörtelmaschinen GmbH | Mixing and conveying device |
| CN106142341A (en) * | 2015-07-17 | 2016-11-23 | 青岛科尼乐机械设备有限公司 | A kind of high-efficiency transmission device of dry powder mortar mixer |
| CN108927029A (en) * | 2018-05-25 | 2018-12-04 | 湖北省联投生物科技股份有限公司 | A kind of mixing of amino acid and agitating device |
| CN112809915A (en) * | 2021-01-14 | 2021-05-18 | 张莹 | Raw material mixing device for cement production convenient to wash and stability is good |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7521688U (en) * | 1976-10-21 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Fan drive with belt tensioning device | |
| US3128997A (en) * | 1964-04-14 | figure | ||
| US2235441A (en) * | 1939-03-17 | 1941-03-18 | Cotta Transmission Corp | Belt take-up |
| DE1240769B (en) * | 1966-08-10 | 1967-05-18 | Alfred Volz | concrete mixer |
| GB1223417A (en) * | 1967-06-01 | 1971-02-24 | William Thomas Teagle | Improvements in and relating to portable mixing machines |
| FR1552024A (en) * | 1967-10-30 | 1969-01-03 | ||
| GB1455992A (en) * | 1973-01-10 | 1976-11-17 | Liner Concrete Machinery | Reversible drive means |
| DE2336699C2 (en) * | 1973-07-19 | 1982-08-12 | Elba-Werk Maschinen-Gesellschaft Mbh & Co, 7505 Ettlingen | Device for mixing building materials |
| DE2539751A1 (en) * | 1975-09-06 | 1977-03-10 | Lothar Dufner | Transport and mixing device for cement etc. - has drive shaft which can have its rotational speed continuously varied |
| DE3128494A1 (en) * | 1981-07-18 | 1983-04-07 | Stetter Gmbh, 8940 Memmingen | Clamping device for friction-contact drives, in particular in forced-mixing concrete mixers |
| SU1280247A1 (en) * | 1985-05-15 | 1986-12-30 | Калининский Филиал Центрального Опытно-Конструкторского И Технологического Бюро Госнити | Self-tightening drive |
-
1992
- 1992-03-30 DE DE4210430A patent/DE4210430A1/en not_active Withdrawn
-
1993
- 1993-01-23 ES ES93101040T patent/ES2087575T3/en not_active Expired - Lifetime
- 1993-01-23 DE DE59302487T patent/DE59302487D1/en not_active Expired - Fee Related
- 1993-01-23 AT AT93101040T patent/ATE137701T1/en not_active IP Right Cessation
- 1993-01-23 EP EP93101040A patent/EP0563519B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ATE137701T1 (en) | 1996-05-15 |
| EP0563519A1 (en) | 1993-10-06 |
| DE4210430A1 (en) | 1993-10-07 |
| DE59302487D1 (en) | 1996-06-13 |
| ES2087575T3 (en) | 1996-07-16 |
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