EP0243608B1 - Apparatus for making a substantially vertical slot in the soil - Google Patents

Apparatus for making a substantially vertical slot in the soil Download PDF

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Publication number
EP0243608B1
EP0243608B1 EP87102691A EP87102691A EP0243608B1 EP 0243608 B1 EP0243608 B1 EP 0243608B1 EP 87102691 A EP87102691 A EP 87102691A EP 87102691 A EP87102691 A EP 87102691A EP 0243608 B1 EP0243608 B1 EP 0243608B1
Authority
EP
European Patent Office
Prior art keywords
cutting wheels
housing
driving wheel
bearing plate
motors
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
Application number
EP87102691A
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German (de)
French (fr)
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EP0243608A1 (en
Inventor
Volker Hentschel
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.)
Hochtief AG
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Hochtief AG
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Filing date
Publication date
Application filed by Hochtief AG filed Critical Hochtief AG
Publication of EP0243608A1 publication Critical patent/EP0243608A1/en
Application granted granted Critical
Publication of EP0243608B1 publication Critical patent/EP0243608B1/en
Expired legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/13Foundation slots or slits; Implements for making these slots or slits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines

Definitions

  • the invention relates generically to a device for introducing an essentially vertical bottom slot in the course of the manufacture of a sealing or support wall, - with machine frame, bearing plate, at least two cutting wheels and motor / gear arrangement, the bearing plate being connected to the machine frame and carries the cutting wheels and the motor / gear arrangement, furthermore the cutting wheels are arranged on a common shaft and parts of the gear arrangement are encompassed by a cutting wheel.
  • the end shield can be connected to the machine frame in a steerable manner (DE-OS 36 02 387).
  • the drive motors are located above the end shield in the machine frame. Transmission elements lead from these drive motors through recesses and cavities in the end shield up to the area of the axis of the cutting wheels. Other gears are also accommodated in recesses or cavities in the end shield. The recesses or cavities become larger with increasing drive torque for the cutting wheels. They reduce the moment of inertia of the end shield. So that the considerable stresses can nonetheless be absorbed, the end shield must be made correspondingly thick. This is disadvantageous because it results in a relatively wide distance between the cutting wheels on the end plate side and consequently a disturbingly wide bottom rib remains between the cutting wheels when they are working.
  • the invention has for its object to further develop a generic device so that can work with a very narrow bearing plate with a small bearing plate side distance of the cutting wheels and nonetheless large drive torques can be entered into the cutting wheels.
  • the invention teaches that a double-sided projecting tubular housing is connected to the bearing plate, in which the two cutting wheels with surrounding hubs, which are placed on the common shaft, are mounted, that on one of the hubs a drive ring gear for the Cutting wheels is placed, which is fitted into the housing with clearance, and that the drive ring gear meshes with the drive pinions of a plurality of drive motors distributed over the circumference of the drive ring gear, which are mounted on a drive motor carrier inserted into the housing.
  • a preferred embodiment of the invention which is characterized by simplicity and functional reliability, is characterized in that the cutting wheels are mounted with their hubs in the housing by means of tapered roller bearings.
  • the drive ring gear is expediently placed on the assigned hub by means of a clamping set.
  • the number of drive motors distributed over the circumference of the drive ring gear is arbitrary. In order to achieve very uniform stress conditions, at least three drive motors will generally be provided.
  • a preferred embodiment of the invention, which allows very large drive torques to be introduced into the cutting wheels is characterized in that five drive motors which are designed as hydraulic motors are arranged over the circumference of the drive ring gear.
  • the cutting wheels will generally be placed on the common shaft with the interposition of a toothing, the cutting wheels can then also be easily removed during maintenance and care work.
  • the device according to the invention can be used with a very narrow bearing plate and consequently with a small distance between the cutting wheels on the bearing plate side. Therefore, only a narrow bottom rib remains between the cutting wheels, which breaks away or can be easily washed away.
  • the housing essential for the invention also ensures a safe encapsulation of the motor / gear arrangement. It goes without saying that suitable seals are arranged between the rotating and the non-rotating parts. Gaps between rotating and non-rotating parts can be easily flushed and thus kept free.
  • the device shown in detail in the figures serves to introduce an essentially vertical bottom slot in the course of the production of a sealing or support wall.
  • the non-rotating parts were drawn in thicker lines for clarity than the rotating parts shown with more hatching. Belong to the basic structure. a machine frame, a bearing plate 1, at least two cutting wheels 2 and a motor / gear arrangement 3.
  • the machine frame was not drawn.
  • the bearing plate 1 is connected to the machine frame, optionally steerable. It carries the cutting wheels 2 and the motor / gear arrangement 3.
  • the cutting wheels 2 are arranged on a common shaft 4. Parts of the gear arrangement are encompassed by a cutting wheel 2.
  • a tubular housing 5 projecting on both sides is connected to the end shield 1, which to the cutting wheels 2 is largely connected to the tubular part of the housing 5 verbun which cover 6 is completed.
  • the two cutting wheels 2 are mounted with surrounding hubs 7 placed on the common shaft 4.
  • a drive ring gear 8 for the cutting wheels 2 is placed on the right of the hubs 7, a drive ring gear 8 for the cutting wheels 2 is placed. This is fitted into the housing 5 with circumferential running play S.
  • the drive ring gear 8 meshes with the drive pinion 9 of a plurality of drive motors 3, which are distributed over the circumference of the drive ring gear 8.
  • These drive motors 3 are mounted on a drive motor carrier 10 inserted into the housing.
  • the cutting wheels 2 are supported with their hubs 7 in the housing by means of tapered roller bearings 11.
  • the drive ring gear 8 is placed on the associated hub 7 by means of the clamping set 12.
  • five drive motors 3 are arranged over the circumference of the drive ring gear 8. These are designed as hydraulic motors.
  • the cutting wheels 2 are placed on the common shaft 4 with the interposition of a toothing 13.
  • the cutting wheels 2 are provided on the circumference with cutting teeth 14.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Hydraulic Motors (AREA)
  • Retarders (AREA)

Description

Die Erfindung bezieht sich gattungsgemäß auf eine Vorrichtung zum Einbringen eines im wesentlichen vertikalen Bodenschlitzes im Zuge der Herstellung einer Dicht- oder Stützwand, - mit Maschinenrahmen, Lagerschild, zumindest zwei Schneidrädern und Motor/Getriebe-Anordnung, wobei der Lagerschild an den Maschinenrahmen angeschlossen ist und die Schneidräder sowie die Motor/Getriebe-Anordnung trägt, wobei fernerhin die Schneidräder auf einer gemeinsamen Welle angeordnet sind und Teile der Getriebeanordnung von einem Schneidrad umfaßt sind. Es versteht sich, daß der Lagerschild an den Maschinenrahmen lenkbar angeschlossen sein kann (DE-OS 36 02 387).The invention relates generically to a device for introducing an essentially vertical bottom slot in the course of the manufacture of a sealing or support wall, - with machine frame, bearing plate, at least two cutting wheels and motor / gear arrangement, the bearing plate being connected to the machine frame and carries the cutting wheels and the motor / gear arrangement, furthermore the cutting wheels are arranged on a common shaft and parts of the gear arrangement are encompassed by a cutting wheel. It goes without saying that the end shield can be connected to the machine frame in a steerable manner (DE-OS 36 02 387).

Bei der bekannten gattungsgemäßen Ausführungsform (DE-OS 34 24 999) befinden sich die Antriebsmotoren oberhalb des Lagerschildes im Maschinenrahmen. Transmissionselemente führen von diesen Antriebsmotoren durch Ausnehmungen und Auskammerungen des Lagerschildes bis in den Bereich der Achse der Schneidräder. In Ausnehmungen oder Auskammerungen des Lagerschildes sind auch andere Getriebe untergebracht. Die Ausnehmungen oder Auskammerungen werden mit zunehmendem Antriebsdrehmoment für die Schneidräder größer. Sie reduzieren das Flächenträgheitsmoment des Lagerschildes. Damit nichtsdestoweniger die erheblichen Beanspruchungen aufgenommen werden können, muß der Lagerschild entsprechend dick ausgeführt werden. Das ist nachteilig, weil daraus ein verhältnismäßig breiter lagerschildseitiger Abstand der Schneidräder resultiert und folglich bei arbeitenden Schneidrädern zwischen diesen eine störend breite Bodenrippe stehenbleibt.In the known generic embodiment (DE-OS 34 24 999), the drive motors are located above the end shield in the machine frame. Transmission elements lead from these drive motors through recesses and cavities in the end shield up to the area of the axis of the cutting wheels. Other gears are also accommodated in recesses or cavities in the end shield. The recesses or cavities become larger with increasing drive torque for the cutting wheels. They reduce the moment of inertia of the end shield. So that the considerable stresses can nonetheless be absorbed, the end shield must be made correspondingly thick. This is disadvantageous because it results in a relatively wide distance between the cutting wheels on the end plate side and consequently a disturbingly wide bottom rib remains between the cutting wheels when they are working.

Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Vorrichtung so weiter auszubilden, daß mit einem sehr schmalen Lagerschild mit geringem lagerschildseitigen Abstand der Schneidräder gearbeitet werden kann und nichtsdestoweniger große Antriebsdrehmomente in die Schneidräder eingetragen werden können.The invention has for its object to further develop a generic device so that can work with a very narrow bearing plate with a small bearing plate side distance of the cutting wheels and nonetheless large drive torques can be entered into the cutting wheels.

Zur Lösung dieser Aufgabe lehrt die Erfindung, daß an den Lagerschild ein beidseits vorkragendes, rohrförmiges Gehäuse angeschlossen ist, in dem die beiden Schneidräder mit einfassenden Naben, die auf die gemeinsame Welle aufgesetzt sind, gelagert sind, daß auf eine der Naben ein Antriebshohlrad für die Schneidräder aufgesetzt ist, welches in das Gehäuse mit Umlaufspiel eingepaßt ist, und daß das Antriebshohlrad mit den Antriebsritzeln einer Mehrzahl von über den Umfang des Antriebshohlrades verteilten Antriebsmotoren kämmt, die an einem in das Gehäuse eingesetzten Antriebsmotorträger gelagert sind.To achieve this object, the invention teaches that a double-sided projecting tubular housing is connected to the bearing plate, in which the two cutting wheels with surrounding hubs, which are placed on the common shaft, are mounted, that on one of the hubs a drive ring gear for the Cutting wheels is placed, which is fitted into the housing with clearance, and that the drive ring gear meshes with the drive pinions of a plurality of drive motors distributed over the circumference of the drive ring gear, which are mounted on a drive motor carrier inserted into the housing.

Das läßt sich im einzelnen auf verschiedene Weise verwirklichen. Eine bevorzugte Ausführungsform der Erfindung, die sich durch Einfachheit und Funktionssicherheit auszeichnet, ist dadurch gekennzeichnet, daß die Schneidräder mit ihren Naben in dem Gehäuse mittels Kegelrollenlager gelagert sind. Das Antriebshohlrad ist zweckmäßigerweise auf die zugeordnete Nabe mittels Spannsatz aufgesetzt. Die Anzahl der über den Umfang des Antriebshohlrades verteilten Antriebsmotoren ist grundsätzlich beliebig. Zur Erzielung sehr gleichmäßiger Beanspruchungsverhältnisse wird man im allgemeinen zumindest drei Antriebsmotoren vorsehen. Eine bevorzugte Ausführungsform der Erfindung, die es erlaubt, sehr große Antriebsdrehmomente in die Schneidräder einzuleiten, ist dadurch gekennzeichnet, daß über den Umfang des Antriebshohlrades fünf Antriebsmotoren angeordnet sind, die als Hydraulikmotoren ausgeführt sind. Die Schneidräder wird man auf die gemeinsame Welle im allgemeinen unter Zwischenschaltung einer Verzahnung aufsetzen, die Schneidräder können dann bei Wartungs- und Pflegearbeiten auch leicht abgezogen werden.This can be achieved in various ways. A preferred embodiment of the invention, which is characterized by simplicity and functional reliability, is characterized in that the cutting wheels are mounted with their hubs in the housing by means of tapered roller bearings. The drive ring gear is expediently placed on the assigned hub by means of a clamping set. In principle, the number of drive motors distributed over the circumference of the drive ring gear is arbitrary. In order to achieve very uniform stress conditions, at least three drive motors will generally be provided. A preferred embodiment of the invention, which allows very large drive torques to be introduced into the cutting wheels, is characterized in that five drive motors which are designed as hydraulic motors are arranged over the circumference of the drive ring gear. The cutting wheels will generally be placed on the common shaft with the interposition of a toothing, the cutting wheels can then also be easily removed during maintenance and care work.

Die erreichten Vorteile sind darin zu sehen, daß bei der erfindungsgemäßen Vorrichtung mit einem sehr schmalen Lagerschild und folglich mit einem geringen lagerschildseitigen Abstand der Schneidräder gearbeitet werden kann. Zwischen den Schneidrädern bleibt daher nur eine schmale Bodenrippe stehen, die wegbricht oder leicht freigespült werden kann. Das für die Erfindung wesentliche Gehäuse bewirkt zugleich eine sichere Kapselung der Motor/Getriebe-Anordnung. Es versteht sich, daß zwischen den rotierenden und den nichtrotierenden Teilen geeignete Dichtungen angeordnet werden. Spalträume zwischen rotierenden und nichtrotierenden Teilen können ohne Schwierigkeiten gespült und dadurch freigehalten werden.The advantages achieved are to be seen in the fact that the device according to the invention can be used with a very narrow bearing plate and consequently with a small distance between the cutting wheels on the bearing plate side. Therefore, only a narrow bottom rib remains between the cutting wheels, which breaks away or can be easily washed away. The housing essential for the invention also ensures a safe encapsulation of the motor / gear arrangement. It goes without saying that suitable seals are arranged between the rotating and the non-rotating parts. Gaps between rotating and non-rotating parts can be easily flushed and thus kept free.

Im folgenden wird die Erfindung anhand einer lediglich ein Ausführungsbeispiel darstellenden Zeichnung ausführlicher erläutert. Es zeigen in schematischer Darstellung

  • Fig. 1 einen Vertikalschnitt durch eine erfindungsgemäße Vorrichtung ausschnittsweise und
  • Fig. 2 einen Schnitt in Richtung A-A durch den Gegenstand nach Fig. 1, ebenfalls ausschnittsweise.
In the following, the invention will be explained in more detail with reference to a drawing showing only one embodiment. They show a schematic representation
  • Fig. 1 shows a vertical section through a device according to the invention in sections and
  • Fig. 2 shows a section in the direction AA through the object of FIG. 1, also in part.

Die in den Figuren ausschnittsweise dargestellte Vorrichtung dient zum Einbringen eines im wesentlichen vertikalen Bodenschlitzes im Zuge der Herstellung einer Dicht- oder Stützwand. Die nichtrotierenden Teile wurden zur Verdeutlichung in dickerer Strichführung gezeichnet als die mit engerer Schraffierung dargestellten rotierenden Teile. Zum grundsätzlichen Aufbau gehören. ein Maschinenrahmen, ein Lagerschild 1, zumindest zwei Schneidräder 2 und eine Motor/Getriebe-Anordnung 3.The device shown in detail in the figures serves to introduce an essentially vertical bottom slot in the course of the production of a sealing or support wall. The non-rotating parts were drawn in thicker lines for clarity than the rotating parts shown with more hatching. Belong to the basic structure. a machine frame, a bearing plate 1, at least two cutting wheels 2 and a motor / gear arrangement 3.

Der Maschinenrahmen wurde nicht gezeichnet. Der Lagerschild 1 ist, gegebenenfalls lenkbar, an den Maschinenrahmen angeschlossen. Er trägt die Schneidräder 2 sowie die Motor/Getriebe-Anordnung 3. Die Schneidräder 2 sind auf einer gemeinsamen Welle 4 angeordnet. Teile der Getriebeanordnung sind von einem Schneidrad 2 umfaßt.The machine frame was not drawn. The bearing plate 1 is connected to the machine frame, optionally steerable. It carries the cutting wheels 2 and the motor / gear arrangement 3. The cutting wheels 2 are arranged on a common shaft 4. Parts of the gear arrangement are encompassed by a cutting wheel 2.

An den Lagerschild 1 ist ein beidseits vorkragendes rohrförmiges Gehäuse 5 angeschlossen, welches zu den Schneidrädern 2 hin weitgehend durch einen mit dem rohrförmigen Teil des Gehäuses 5 verbun denen Deckel 6 abgeschlossen ist. In dem Gehäuse 5, genauer in dem Deckel 6, sind die beiden Schneidräder 2 mit einfassenden, auf die gemeinsame Welle 4 aufgesetzten Naben 7 gelagert. Auf die rechte der Naben 7 ist ein Antriebshohlrad 8 für die Schneidräder 2 aufgesetzt. Dieses ist in das Gehäuse 5 mit Umfangslaufspiel S eingepaßt. Das Antriebshohlrad 8 kämmt mit dem Antriebsritzel 9 einer Mehrzahl von Antriebsmotoren 3, die über den Umfang des Antriebshohlrades 8 verteilt sind. Diese Antriebsmotoren 3 sind an einem in das Gehäuse eingesetzten Antriebsmotorträger 10 gelagert.A tubular housing 5 projecting on both sides is connected to the end shield 1, which to the cutting wheels 2 is largely connected to the tubular part of the housing 5 verbun which cover 6 is completed. In the housing 5, more precisely in the cover 6, the two cutting wheels 2 are mounted with surrounding hubs 7 placed on the common shaft 4. On the right of the hubs 7, a drive ring gear 8 for the cutting wheels 2 is placed. This is fitted into the housing 5 with circumferential running play S. The drive ring gear 8 meshes with the drive pinion 9 of a plurality of drive motors 3, which are distributed over the circumference of the drive ring gear 8. These drive motors 3 are mounted on a drive motor carrier 10 inserted into the housing.

Die Schneidräder 2 sind mit ihren Naben 7 in dem Gehäuse mittels Kegelrollenlager 11 gelagert. Das Antriebshohlrad 8 ist auf die zugeordnete Nabe 7 mittels Spannsatz 12 aufgesetzt. Im Ausführungsbeispiel sind über den Umfang des Antriebshohlrades 8 fünf Antriebsmotoren 3 angeordnet. Diese sind als Hydraulikmotoren ausgeführt. Die Schneidräder 2 sind auf die gemeinsame Welle 4 unter Zwischenschaltung einer Verzahnung 13 aufgesetzt. Die Schneidräder 2 sind umfangsseitig mit Schneidzähnen 14 versehen.The cutting wheels 2 are supported with their hubs 7 in the housing by means of tapered roller bearings 11. The drive ring gear 8 is placed on the associated hub 7 by means of the clamping set 12. In the exemplary embodiment, five drive motors 3 are arranged over the circumference of the drive ring gear 8. These are designed as hydraulic motors. The cutting wheels 2 are placed on the common shaft 4 with the interposition of a toothing 13. The cutting wheels 2 are provided on the circumference with cutting teeth 14.

Claims (5)

1 An equipment to provide a basically vertical floor trench in the course of production of an impervious wall or support wall, with a machine frame, a bearing plate (1), at least two cutting wheels (2), and a motor/gearbox assembly (3) in which the bearing plate (1) is attached to the machine frame and carries the cutting wheels (2) and the motor/gearbox assembly (3), and in which, in addition, the cutting wheels (2) are mounted on a common shaft (4) and parts of the gearbox assembly are surronded by a cutting wheel (2), characterised in that a tubular- shaped housing (5), projection on both sides, is attached to the bearing plate (1), in which the two cutting wheels (2) run on inwardly-projecting bosses (7) that are mounted on the common shaft (4), that a hollow driving wheel (8) for the cutting wheels (2) is mounted on one of the bosses (7), fitting into the housing (5) with rotational clearance (S), and that the hollow driving wheel (8) meshes with the driving pinions (9) of a plurality of driving motors (3) distributed around the circumference of the hollow driving wheel (8), which motors run on a driving motor carrier (10) inserted into the housing (5).
2. An equipment according to Claim 1, characterised in that the cutting wheels (2) with their bosses (7) are supported in the housing (5) by means of tapered roller bearings (11).
3. An equipment according to one of Claims 1 or 2, characterised in that the hollow driving wheel (8) is mounted on the associated boss (7) by means of a tightening piece (12).
4. An equipment according to one of Claims 1 to 3, characterised in that five driving motors (3) distributed around the circumference of the hollow driving wheel (8), are constructed as hydraulic motors.
5. An equipment according to one of Claims 1 to 4, characterised in that the cutting wheels (2) are mounted on the common shaft (4) with intermediate gear teeth (13).
EP87102691A 1986-04-10 1987-02-25 Apparatus for making a substantially vertical slot in the soil Expired EP0243608B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863612020 DE3612020A1 (en) 1986-04-10 1986-04-10 DEVICE FOR INSERTING AN ESSENTIAL VERTICAL FLOOR SLOT
DE3612020 1986-04-10

Publications (2)

Publication Number Publication Date
EP0243608A1 EP0243608A1 (en) 1987-11-04
EP0243608B1 true EP0243608B1 (en) 1989-06-14

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ID=6298357

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87102691A Expired EP0243608B1 (en) 1986-04-10 1987-02-25 Apparatus for making a substantially vertical slot in the soil

Country Status (5)

Country Link
US (1) US4785559A (en)
EP (1) EP0243608B1 (en)
JP (1) JPH0711148B2 (en)
CS (1) CS262688B2 (en)
DE (1) DE3612020A1 (en)

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US4662684A (en) * 1979-12-13 1987-05-05 H. B. Zachery Corporation Rotary rock and trench cutting saw
FR2499607A1 (en) * 1981-02-06 1982-08-13 Gautier Andre Vehicle for digging trenches - includes pneumatic driving wheels which bear onto internal surface of main cutter wheel
GB2123362B (en) * 1982-04-08 1986-03-26 Wheelpower Limited A self-propelling hub unit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0167090A2 (en) * 1984-07-06 1986-01-08 Bauer Spezialtiefbau GmbH Cutting wheel apparatus for excavating cut-off trenches
DE3424999A1 (en) * 1984-07-06 1986-01-16 Karl Bauer Spezialtiefbau GmbH & Co KG, 8898 Schrobenhausen SLOT WALL MILLING
DE3602387C1 (en) * 1986-01-28 1987-06-04 Hochtief Ag Hoch Tiefbauten Device for introducing a substantially vertical bottom slot

Also Published As

Publication number Publication date
JPH0711148B2 (en) 1995-02-08
EP0243608A1 (en) 1987-11-04
US4785559A (en) 1988-11-22
JPS62242094A (en) 1987-10-22
CS262688B2 (en) 1989-03-14
DE3612020A1 (en) 1987-10-15
CS253487A2 (en) 1988-08-16
DE3612020C2 (en) 1989-09-14

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