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EP0058755B1 - Supplementary tool for percussion boring machine - Google Patents

Supplementary tool for percussion boring machine Download PDF

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Publication number
EP0058755B1
EP0058755B1 EP81108660A EP81108660A EP0058755B1 EP 0058755 B1 EP0058755 B1 EP 0058755B1 EP 81108660 A EP81108660 A EP 81108660A EP 81108660 A EP81108660 A EP 81108660A EP 0058755 B1 EP0058755 B1 EP 0058755B1
Authority
EP
European Patent Office
Prior art keywords
shank
chisel
supplementary tool
tool according
anvil
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
EP81108660A
Other languages
German (de)
French (fr)
Other versions
EP0058755A3 (en
EP0058755A2 (en
Inventor
Reinhold Rauscher
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0058755A2 publication Critical patent/EP0058755A2/en
Publication of EP0058755A3 publication Critical patent/EP0058755A3/en
Application granted granted Critical
Publication of EP0058755B1 publication Critical patent/EP0058755B1/en
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • B28D1/146—Tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/005—Attachments or adapters placed between tool and hammer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2216/00—Details of portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
    • B25D2216/0007—Details of percussion or rotation modes
    • B25D2216/0046—Preventing rotation

Definitions

  • the invention relates to an additional tool for rotary impact drills according to the preamble of claim 1.
  • Such additional tools are primarily drills that are used for walls made of particularly hard material. In operation, this drill performs both a rotary movement and an axial movement.
  • the impact drill can be adjustable in such a way that the additional tools only perform a rotary movement.
  • an additional tool of the type specified in the preamble of claim 1 is already known.
  • a cutting part is provided which has an axial bore at the rear end, in which the shaft is freely rotatable.
  • this embodiment has the advantage that no intermediate links, such as a coupling or other complex measures, are required to enable a connection between the shaft and the cutting part, which only transmit the impact movement of the machine to the Effect cutting part. Rather, a direct connection between the shaft and the cutting part is achieved without the use of a coupling and without design changes to the rotary impact drilling machine, which only ensures transmission of the impact movement to the cutting part.
  • the invention has for its object to improve the additional tool of the type mentioned, with simple design measures to optimize the efficiency on the one hand in the different modes of impact operation, impact / drilling operation and on the other hand depending on the material to be processed.
  • the inventive design of the shaft with the feed limiting devices ensures that the cutting part can be displaced in the axial direction to a limited extent with respect to the shaft. It is possible to arrange a damping device between the anvil serving as a limitation and the associated end face of the cutting part, which can be formed, for example, by spring washers, the spring force of which counteracts the impact force, so that the impact force e.g. is reduced when processing soft material. Only when the spring force is overcome by the feed force and the shaft comes to bear directly against the cutting part, is the impact force directly introduced into the cutting part.
  • the shaft is brought into a defined end position by means of the anvil resting against the cutting part, in which the tip of the shaft protrudes from the end face of the cutting part by a certain optimal length.
  • the shaft can be brought into a position in which the shaft tip is in one plane with the end face of the cutting part.
  • the chisel 13 has an axial through hole 14, so that the one with a Boh rerspitze 15 provided shaft 16 protrudes from the end face 17 of the chisel.
  • the shaft 16 has an integrally formed anvil 18, which serves on the one hand as a feed limitation and on the other hand ensures that the blows from the percussion drilling shaft are transmitted uniformly to the end face of the chisel 13. With the help of washers 19 it can be achieved that the drill tip 15 protrudes more or less with respect to the end face 17 of the chisel 13.
  • the pin 20 is provided with a handle 21, which facilitates the guidance of the chisel.
  • the free end of the shaft is designed in the manner of a drill so that drilling dust is prevented from getting into the axial through bore 14 and the shaft is eating.
  • the pin 20, in conjunction with the annular groove 22, limits the movement of the shaft 16 in the direction of the arrow 23 such that the cutting edge 24 of the drill tip 15 is in the same plane as the end face 17, so that the drill tip is also suitable for one when chiseling Removal of mortar dust and the like ensures.
  • the anvil 26 formed on the shaft 25 has an annular shoulder 27 which engages in a corresponding recess 28 of an intermediate ring 29, so that the shaft e.g. occupies the position in which the drill tip protrudes relative to the cutting part.
  • the intermediate ring By simply turning the intermediate ring around, it is achieved that the shaft 25 is withdrawn by the distance a relative to the cutting part 30, so that the shaft with the drill tip assumes its retracted end position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Description

Die Erfindung betrifft ein Zusatzwerkzeug für Drehschlagbohrmaschinen entsprechend dem Oberbegriff des Anspruchs 1.The invention relates to an additional tool for rotary impact drills according to the preamble of claim 1.

Bei derartigen Zusatzwerkzeugen handelt es sich in erster Linie um Bohrer, die für Mauern aus besonders hartem Material verwendet werden. Im Betrieb führt dieser Bohrer sowohl eine Drehbewegung als auch eine axiale Bewegung aus. Für andere Zusatzwerkzeuge kann die Schlagbohrmaschine derart einstellbar sein, dass die Zusatzwerkzeuge nur eine Drehbewegung ausführen.Such additional tools are primarily drills that are used for walls made of particularly hard material. In operation, this drill performs both a rotary movement and an axial movement. For other additional tools, the impact drill can be adjustable in such a way that the additional tools only perform a rotary movement.

Für bestimmte Arbeitsvorgänge ist es zweckmässig, dass das Werkzeug nur eine Axialbewegung ausführt. Dies gilt vor allem, wenn in einer Mauer Rinnen zum Verlegen von elektrischen Leitungen ausgebildet werden sollen. Derartige Rinnen können mit einem Bohrer nur schwer ausgebildet werden, da dieser zu stark auswandert und es nur schwer möglich ist, einen geraden Verlauf zu erzielen.For certain work processes, it is advisable that the tool only perform an axial movement. This is especially true when gutters are to be formed in a wall for laying electrical cables. Such channels are difficult to form with a drill because it drifts too much and it is difficult to achieve a straight course.

Aus der US-A 1 863 928 ist ein Zusatzwerkzeug mit einem äusseren Bohrmeissel und einem inneren Schlagmeissel bekannt, zwischen denen eine gegenseitige Verzahnung besteht, so dass sich im Betrieb beide Werkzeuge ständig drehen. Eine reine Axialbewegung eines Meissels kann mit diesem Zusatzwerkzeug nicht erzeugt werden.From US-A 1 863 928 an additional tool with an outer drill bit and an inner hammer bit is known, between which there is a mutual toothing, so that both tools rotate continuously during operation. A pure axial movement of a chisel cannot be created with this additional tool.

Ferner ist ein Zusatzwerkzeug der im Oberbegriff des Anspruchs 1 angegebenen Art bereits bekannt. Bei diesem bekannten Zusatzwerkzeug ist ein Schneidteil vorgesehen, welcher am hinteren Ende eine axiale Bohrung aufweist, in der der Schaft frei drehbar angeordnet ist. Gegenüber den vorbekannten Vorrichtungen vergleichbarer Art weist diese Ausführungsform den Vorteil auf, dass keine Zwischenglieder, wie eine Kupplung oder sonstige aufwendige Massnahmen, erforderlich sind, um eine Verbindung zwischen dem Schaft und dem Schneidteil zu ermöglichen, die nur eine Übertragung der Schlagbewegung der Maschine auf den Schneidteil bewirken. Vielmehr wird ohne die Verwendung einer Kupplung und ohne konstruktive Änderung der Drehschlagbohrmaschine erreicht, eine direkte Verbindung zwischen dem Schaft und dem Schneidteil herzustellen, die nur eine Übertragung der Schlagbewegung auf den Schneidteil sicherstellt.Furthermore, an additional tool of the type specified in the preamble of claim 1 is already known. In this known additional tool, a cutting part is provided which has an axial bore at the rear end, in which the shaft is freely rotatable. Compared to the previously known devices of a comparable type, this embodiment has the advantage that no intermediate links, such as a coupling or other complex measures, are required to enable a connection between the shaft and the cutting part, which only transmit the impact movement of the machine to the Effect cutting part. Rather, a direct connection between the shaft and the cutting part is achieved without the use of a coupling and without design changes to the rotary impact drilling machine, which only ensures transmission of the impact movement to the cutting part.

In der Praxis haben sich allerdings einige Nachteile des bekannten Zusatzwerkzeuges herausgestellt, die durch die vorliegende Erfindung beseitigt werden sollen. So ergeben sich für den Bohrer gegenüber dem Schneidteil keine definierten Endlagen. Es kann deshalb vorkommen, dass die axialen Schlagkräfte nicht über die Schlagbohrwelle in den Schaft und damit in den Schneidteil eingeleitet werden, sondern dass die Einleitung der Kräfte über den stirnseitigen schmalen Kranz des Spannfutters in den Schneidteil erfolgt, so dass das Spannfutter beschädigt wird. Es hat sich auch gezeigt, dass es mitunter zweckmässig ist, bei einem bereits verputzten Mauerwerk zunächst schwächere Schläge zur Ausarbeitung der Rinne auszuführen, um die weicheren Deckschichten zu durchtrennen und danach härtere Schläge aufzubringen, wenn die Rinnen in das darunterliegende harte Gestein einzubringen sind.In practice, however, some disadvantages of the known additional tool have emerged, which are to be eliminated by the present invention. So there are no defined end positions for the drill compared to the cutting part. It can therefore happen that the axial impact forces are not introduced into the shaft and thus into the cutting part via the percussion drilling shaft, but rather that the forces are introduced into the cutting part via the narrow rim of the chuck on the face side, so that the chuck is damaged. It has also been shown that it is sometimes expedient to first apply weaker blows to the gutter on an already plastered masonry in order to cut through the softer surface layers and then apply harder blows when the gutters are to be introduced into the hard rock underneath.

Der Erfindung liegt die Aufgabe zugrunde, das Zusatzwerkzeug der eingangs genannten Art zu verbessern, wobei durch einfache konstruktive Massnahmen eine Optimierung der Wirkungsgrade einerseits bei den verschiedenen Betriebsarten Schlagbetrieb, Schlag-/Bohrbetrieb und andererseits in Abhängigkeit von dem zu bearbeitenden Material erreicht werden soll.The invention has for its object to improve the additional tool of the type mentioned, with simple design measures to optimize the efficiency on the one hand in the different modes of impact operation, impact / drilling operation and on the other hand depending on the material to be processed.

Diese Aufgabe wird durch die im Kennzeichen des Anspruchs 1 angegebenen Merkmale gelöst. Durch die erfindungsgemässe Ausbildung des Schaftes mit den Vorschubbegrenzungseinrichtungen wird erreicht, dass der Schneidteil gegenüber dem Schaft in Axialrichtung begrenzt verschiebbar ist. Dabei besteht die Möglichkeit, zwischen dem als eine Begrenzung dienenden Amboss und der zugeordneten Stirnfläche des Schneidteiles eine Dämpfungseinrichtung anzuordnen, die beispielsweise von Federscheiben gebildet sein kann, deren Federkraft der Schlagkraft entgegenwirkt, so dass die Schlagkraft z.B. bei der Bearbeitung von weichem Material gemindert wird. Erst wenn die Federkraft durch die Vorschubkraft überwunden wird und der Schaft direkt gegen den Schneidteil zur Anlage kommt, wird die Schlagkraft unmittelbar in den Schneidteil eingeleitet.This object is achieved by the features specified in the characterizing part of claim 1. The inventive design of the shaft with the feed limiting devices ensures that the cutting part can be displaced in the axial direction to a limited extent with respect to the shaft. It is possible to arrange a damping device between the anvil serving as a limitation and the associated end face of the cutting part, which can be formed, for example, by spring washers, the spring force of which counteracts the impact force, so that the impact force e.g. is reduced when processing soft material. Only when the spring force is overcome by the feed force and the shaft comes to bear directly against the cutting part, is the impact force directly introduced into the cutting part.

Der Schaft wird mittels des gegen den Schneidteil anliegenden Ambosses in eine definierte Endlage gebracht, in welcher die Spitze des Schaftes um eine bestimmte optimale Länge gegenüber der Stirnfläche des Schneidteiles hervorsteht. Durch die Verwendung eines Zwischenringes kann der Schaft in eine solche Stellung gebracht werden, in welcher sich die Schaftspitze mit der Stirnfläche des Schneidteiles in einer Ebene befindet.The shaft is brought into a defined end position by means of the anvil resting against the cutting part, in which the tip of the shaft protrudes from the end face of the cutting part by a certain optimal length. By using an intermediate ring, the shaft can be brought into a position in which the shaft tip is in one plane with the end face of the cutting part.

Lediglich die Schaftspitze ist als Bohrer ausgebildet, so dass der Bohrstaub in beiden Endstellungen des Schaftes von der Schneidteilstirnfläche weg-gefördert wird, aber gleichzeitig verhindert wird, dass Bohrstaub in die Axialbohrung gefördert wird.Only the shaft tip is designed as a drill so that the drilling dust is conveyed away from the face of the cutting part in both end positions of the shaft, but at the same time it prevents drilling dust from being conveyed into the axial bore.

Weitere vorteilhafte Ausgestaltungen des Gegenstandes der Erfindung ergeben sich aus den Unteransprüchen.Further advantageous refinements of the subject matter of the invention result from the subclaims.

Die Erfindung wird nachstehend anhand verschiedener in der Zeichnung dargestellter bevorzugter Ausführungsbeispiele erläutert. Es zeigen:

  • Fig. 1 eine Seitenansicht eines teilweise geschnittenen Zusatzwerkzeuges gemäss einer ersten bevorzugten Ausführungsform;
  • Fig. 2 eine Teilseitenansicht eines teilweise geschnittenen Zusatzwerkzeuges gemäss einer zweiten bevorzugten Ausführungsform.
The invention is explained below with reference to various preferred exemplary embodiments shown in the drawing. Show it:
  • 1 shows a side view of a partially cut auxiliary tool according to a first preferred embodiment;
  • Fig. 2 is a partial side view of a partially cut additional tool according to a second preferred embodiment.

Bei dem in der Fig. 1 gezeigten Ausführungsbeispiel weist der Meissel 13 eine axiale Durchgangsbohrung 14 auf, so dass der mit einer Bohrerspitze 15 versehene Schaft 16 gegenüber der Stirnfläche 17 des Meissels vorsteht. In diesem Ausführungsbeispiel besitzt der Schaft 16 einen angeformten Amboss 18, welcher einerseits als Vorschubbegrenzung dient und andererseits dafür sorgt, dass die Schläge von der Schlagbohrwelle gleichmässig auf die Stirnseite des Meissels 13 übertragen werden. Mit Hilfe von Beilegscheiben 19 kann erreicht werden, dass die Bohrerspitze 15 mehr oder weniger gegenüber der Stirnfläche 17 des Meissels 13 vorsteht.In the embodiment shown in FIG. 1, the chisel 13 has an axial through hole 14, so that the one with a Boh rerspitze 15 provided shaft 16 protrudes from the end face 17 of the chisel. In this exemplary embodiment, the shaft 16 has an integrally formed anvil 18, which serves on the one hand as a feed limitation and on the other hand ensures that the blows from the percussion drilling shaft are transmitted uniformly to the end face of the chisel 13. With the help of washers 19 it can be achieved that the drill tip 15 protrudes more or less with respect to the end face 17 of the chisel 13.

Im übrigen ist der Zapfen 20 mit einem Griffstück 21 versehen, welches die Führung des Meissels erleichtert.In addition, the pin 20 is provided with a handle 21, which facilitates the guidance of the chisel.

Wie die Fig. 1 ferner deutlich erkennen lässt, ist ledigleich das freie Ende des Schaftes bohrerartig ausgestaltet, so dass verhindert wird, dass Bohrstaub in die axiale Durchgangsbohrung 14 gelangt und der Schaft frisst. Der Zapfen 20 begrenzt in Verbindung mit der Ringnut 22 die Bewegung des Schaftes 16 in Richtung des Pfeiles 23 derart, dass sich die Schneide 24 der Bohrerspitze 15 in der gleichen Ebene wie die Stirnfläche 17 befindet, so dass die Bohrerspitze auch bei reinem Meisselbetrieb für einen Abtransport von Mörtelstaub und dergleichen sorgt.As can also be clearly seen in FIG. 1, the free end of the shaft is designed in the manner of a drill so that drilling dust is prevented from getting into the axial through bore 14 and the shaft is eating. The pin 20, in conjunction with the annular groove 22, limits the movement of the shaft 16 in the direction of the arrow 23 such that the cutting edge 24 of the drill tip 15 is in the same plane as the end face 17, so that the drill tip is also suitable for one when chiseling Removal of mortar dust and the like ensures.

Bei dem zweiten Ausführungsbeispiel gemäss Fig. 2 weist der an den Schaft 25 angeformte Amboss 26 eine Ringschulter 27 auf, welche in eine entsprechende Aussparung 28 eines Zwischenringes 29 eingreift, so dass der Schaft z.B. diejenige Lage einnimmt, in welcher die Bohrerspitze gegenüber dem Schneidteil vorsteht. Durch einfaches Umdrehen des Zwischenringes wird erreicht, dass der Schaft 25 um die Strecke a gegenüber dem Schneidteil 30 zurückgezogen wird, so dass der Schaft mit der Bohrerspitze seine eingezogene Endlage einnimmt.In the second exemplary embodiment according to FIG. 2, the anvil 26 formed on the shaft 25 has an annular shoulder 27 which engages in a corresponding recess 28 of an intermediate ring 29, so that the shaft e.g. occupies the position in which the drill tip protrudes relative to the cutting part. By simply turning the intermediate ring around, it is achieved that the shaft 25 is withdrawn by the distance a relative to the cutting part 30, so that the shaft with the drill tip assumes its retracted end position.

Es ist natürlich auch denkbar, den Amboss auf der dem Schneidteil zugewandten Seite mit mehreren Ringschultern unterschiedlichen Durchmessers zu versehen und entsprechend unterschiedliche Zwischenringe vorzusehen, die gegeneinander austauschbar sind. Es wäre auch denkbar, gegeneinander verschraubbare und konterbare Gewindestücke zur Vorschubeinstellung des Schaftes vorzusehen.It is of course also conceivable to provide the anvil on the side facing the cutting part with a plurality of ring shoulders of different diameters and to provide correspondingly different intermediate rings which are interchangeable. It would also be conceivable to provide threaded pieces which can be screwed and countered against one another for adjusting the feed of the shaft.

Claims (7)

1. Supplementary tool for percussion boring machines having a shank (16, 25) insertable into the chuck of the machine and a chisel (13, 30) connectable with said shank, said chisel having at least one axial bore (14) wherein said shank is arranged axially displaceably and freely pivotally in relation to the chisel, characterized in that shank (16, 25) penetrates chisel (13, 30) and is dimensioned in length so that in the farthest inserted end position of said shank, limited by a stop, tip (15) of said shank protrudes from the front surface (17) of chisel (13, 30), said shank at its free end being made as a drill (15), and that there are provided limiting means (18, 20, 22, 26) being arranged at a distance to each other, limiting on the one hand the insertion of the shank into the chisel and on the other hand the relative movement between the shank and the chisel in the opposite direction.
2. Supplementary tool according to Claim 1, characterized in that the insertion-limiting means is formed by an anvil (18, 26) disposed at said shank.
3. Supplementary tool according to Claim 2, characterized in that between anvil (18, 26) and chisel (13) there is disposed an intermediary member as attenuation device.
4. Supplementary tool according to Claim 2, characterized in that between anvil (18, 26) and chisel (13, 30) there are disposed a plurality of intermediary members as shims (19) or as spacers (29).
5. Supplementary tool according to Claim 4, characterized in that the intermediary members (19) limiting the insertion of shank (16, 25) into the axial bore are dimensioned so that in a medium position tip (15) of the shank is in alignment with the front surface (17) of chisel (13).
6. Supplementary tool according to any of Claims 1 to 5, characterized in that the limiting means (18, 20, 22, 26) against draw-off of chisel (13, 30) from the shank is formed by an annular groove (22) provided in the shank jacket and by a pivot (20) engaging in said annular groove.
7. Supplementary tool according to any of Claims 2 to 6, characterized in that on the side facing the chisel anvil (26) has at least one annular shoulder (27) which is insertable into a corresponding recess (28) of a replaceable spacer (29).
EP81108660A 1981-02-19 1981-10-21 Supplementary tool for percussion boring machine Expired EP0058755B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813106192 DE3106192A1 (en) 1981-02-19 1981-02-19 ADDITIONAL TOOL FOR ROTARY DRILLING MACHINES
DE3106192 1981-02-19

Publications (3)

Publication Number Publication Date
EP0058755A2 EP0058755A2 (en) 1982-09-01
EP0058755A3 EP0058755A3 (en) 1983-08-03
EP0058755B1 true EP0058755B1 (en) 1986-01-29

Family

ID=6125291

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108660A Expired EP0058755B1 (en) 1981-02-19 1981-10-21 Supplementary tool for percussion boring machine

Country Status (6)

Country Link
EP (1) EP0058755B1 (en)
AT (1) AT375582B (en)
DE (2) DE3106192A1 (en)
ES (3) ES274361Y (en)
FR (1) FR2499889B1 (en)
GB (1) GB2093394B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3743817C2 (en) * 1987-12-23 1995-11-02 Hilti Ag Rock, drill and chisel tools

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB294414A (en) * 1927-08-27 1928-07-26 George Henry Thompson Improvements in or relating to power-driven percussion tools
US1863928A (en) * 1931-05-09 1932-06-21 James A Macdonell Combination percussion and rotary drill
DE732395C (en) * 1939-01-22 1943-03-01 Alfred Heger Jun Stone drill to be operated by impact
FR970061A (en) * 1948-07-16 1950-12-29 Machine for de-grinding used bricks from demolition and the like
BE795817A (en) * 1972-02-25 1973-06-18 Demarok Int Ltd DRILLING EQUIPMENT AND ADAPTER FOR IT
DE2419548C2 (en) * 1974-04-23 1983-05-05 Hawera Probst Gmbh + Co, 7980 Ravensburg Drilling tool for rotary hammers
DE2651289C3 (en) * 1976-11-10 1979-10-31 Reinhold 8000 Muenchen Rauscher Additional tool for rotary percussion drills

Also Published As

Publication number Publication date
FR2499889A1 (en) 1982-08-20
AT375582B (en) 1984-08-27
DE3106192A1 (en) 1982-08-26
ES272976U (en) 1983-12-01
ES274361U (en) 1984-04-16
GB2093394A (en) 1982-09-02
FR2499889B1 (en) 1985-07-19
ATA192981A (en) 1984-01-15
ES274361Y (en) 1984-12-01
EP0058755A3 (en) 1983-08-03
ES272975U (en) 1983-12-01
ES272975Y (en) 1984-06-01
DE3173654D1 (en) 1986-03-13
EP0058755A2 (en) 1982-09-01
ES272976Y (en) 1984-06-01
GB2093394B (en) 1984-03-21

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