WO1996008606A1 - Procede de pose d'un boulon d'ancrage et adaptateur utilise pour mettre en oeuvre ce procede - Google Patents

Procede de pose d'un boulon d'ancrage et adaptateur utilise pour mettre en oeuvre ce procede Download PDF

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Publication number
WO1996008606A1
WO1996008606A1 PCT/EP1995/003574 EP9503574W WO9608606A1 WO 1996008606 A1 WO1996008606 A1 WO 1996008606A1 EP 9503574 W EP9503574 W EP 9503574W WO 9608606 A1 WO9608606 A1 WO 9608606A1
Authority
WO
WIPO (PCT)
Prior art keywords
base body
medium
housing part
drilling
adapter part
Prior art date
Application number
PCT/EP1995/003574
Other languages
German (de)
English (en)
Inventor
Heinz Gruber
Original Assignee
Reburg-Patentverwertungsgesellschaft Mbh
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 Reburg-Patentverwertungsgesellschaft Mbh filed Critical Reburg-Patentverwertungsgesellschaft Mbh
Priority to EP95932715A priority Critical patent/EP0803014A1/fr
Priority to AU35658/95A priority patent/AU3565895A/en
Publication of WO1996008606A1 publication Critical patent/WO1996008606A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/02—Swivel joints in hose-lines
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/028—Devices or accesories for injecting a grouting liquid in a bore-hole

Definitions

  • the invention relates to a method and an adapter part according to the respective preambles of claims 1 and 8.
  • Rock anchors as such are known to serve to stabilize slopes or the inner walls of cavities, in that several successive ones perpendicular to the plane of the slope or also the walls
  • a drill rod which is provided at one end with a drill bit and the other end of which is coupled with a drill drive, is used in a first phase like a drill rod, with the central one extending in the longitudinal direction a flushing medium, for example water or air, which is discharged in the area of the drill bit and the mountain particles loosened as a result of the drilling process, is guided in the cavity extending the drill rod rod, via the annular space between the drill rod rod and the inner walls of the borehole in the rearward direction, ie in the direction of the Drilled out the mouth of the borehole.
  • a flushing medium for example water or air
  • a hardenable medium eg a mortar suspension or a synthetic resin is also introduced into the borehole, which after filling the borehole and after hardening produces a firm bond between the surrounding rock layers on the one hand and the drill rod rod on the other hand, so that the drill rod rod used remains in the bore as a lost tool and is subsequently used is braced by anchor plates in the area of the hole opening.
  • a method for setting a rock anchor in which a self-drilling anchor is used, a mortar suspension or the like being used as drilling medium during drilling, relatively smaller portions of the rock particles being flushed out and being relatively Coarse parts are washed around by the mortar suspension and incorporated into it during its hardening.
  • This method can be used with particular advantage for use in low-cohesion to non-cohesive mountains, since in these cases it would otherwise be difficult to produce a secure bond between the anchor and the surrounding mountains that is suitable for absorbing sufficient tensile forces.
  • a self-drilling anchor is characterized in that during the drilling phase the drilling drive provided with a flushing head is coupled to the anchor rod and remains in this state until the drilling process has been completed.
  • the drilling drive To insert the hardenable medium, the drilling drive must be released from the anchor rod and then the latter must be coupled with a suitable head part for introducing the hardenable medium. This means that from drilling the hole to filling it with a hardenable medium, numerous assembly and disassembly processes are required. are necessary, which naturally adversely affect the cost balance of setting a rock anchor.
  • the drilling drive is coupled to the armature with the interposition of one of the optional or switchable guidance of a flushing medium or a hardenable medium and that this coupling state is used from the drilling phase to the complete filling of the borehole when a self-drilling armature is used the curable medium is maintained unchanged.
  • An adapter part is therefore used according to the invention, which can be switched, for example, by simply switching from the conveyance of a flushing medium to the conveyance of a hardenable medium, and without changes being made to the coupling state of the adapter part with the drill drive on the one hand and the drill anchor rod on the other hand have to.
  • activities at the end of the drilling phase are therefore limited to simply switching over the medium delivery.
  • the method according to the invention is in accordance with
  • claims 4 and 5 are directed to an advantageous embodiment of the method according to the invention.
  • an adapted nature of this mixing ratio can be expedient.
  • This mixing ratio should preferably be infinitely variable so that an optimal adaptation to the mountain conditions found in each case is possible.
  • a hardenable medium namely a mortar suspension
  • a flushing agent can be used as a flushing agent during the drilling process, so that in the case of extremely low-cohesion rock a large penetration of loosened rock particles and mortar and thus a reliable bond between anchor rod and rock result.
  • rock layers of different cohesion states can follow one another, so that these conditions can be achieved in the simplest way by simply adjusting the mixing ratio during the drilling phase, starting from the conveyance of a hardenable medium to the conveyance of a pure flushing medium , in particular can be taken into account in a manner adapted to the individual case, and without complicated assembly and disassembly processes in the area of the drill drive being necessary for these adjustment processes.
  • the method according to the invention is in accordance with Features of claim 7 can be used when the drilling drive is guided manually, but especially when the drilling drive has a guide, in particular a drilling carriage, a carriage or a comparable guide system. In the latter case in particular, time and thus cost savings are noticeable.
  • the basic body mentioned has a central cavity which is in continuous connection with only one coupling section, namely that which is intended for coupling the anchor rod.
  • the other coupling section is intended for coupling the drilling drive, but has no function with regard to the guidance of a flushing medium.
  • the housing part of the adapter part is fixed axially on the base body using at least one elastic buffer member. In this way, the mechanical stresses of the housing part caused by the impact operation during the drilling process are strongly damped, so that the service life of the adapter part is increased.
  • the Housing part is here opposite to the rotatable
  • Base body-fixed component provided with at least one pipe connection, the supply of either mortar suspension or a synthetic resin or also a flushing medium being carried out via the pipe connection.
  • the coupling sections are preferably designed as internal thread sections in accordance with the features of claim 10. However, other forms of training of the coupling section can also be considered, insofar as these are suitable for conveying media.
  • the features of claim 11 are aimed at dimensioning the flow paths for the hardenable medium and the flushing medium in such a way that the lowest possible pressure losses result. Since the adapter part is used both for guiding the flushing medium and for guiding the hardenable medium, there is the further advantage that an increase in the flushing medium supply and thus a significant increase in the drilling capacity is possible due to a large cross-sectional dimension.
  • the adapter part Designing the adapter part in such a way that two flow control elements for controlling the inflows for the flushing medium and a hardenable medium are assigned to a uniform pipe connection.
  • the said annular space of the adapter part can also be provided with two pipe connections , each feeding either a flushing medium or a curable. Serve medium.
  • the features of claim 13 have the advantage that the components of the adapter part which are exposed to considerable wear and tear are demon- are animal and interchangeable with new parts. Finally, the ring shoulder also offers considerable mechanical protection for these wearing parts during the drilling operation.
  • the adapter part according to the invention is thus simultaneously designed as a robust and user-friendly component.
  • claims 14 to 16 are directed to a specific embodiment of the mounting of the housing part on the base body of the adapter part.
  • this mounting must be such that, on the one hand, there is radial guidance of the base body rotatable relative to the housing part, but that, at the same time, axial relative movements of the base body are possible which result from the percussion drilling operation.
  • These bearing functions are then taken over by two running disks, which, for example, have a fixed but detachable connection to the housing part on the end face. After these components naturally form wear parts, they are releasably connected to the housing part.
  • the running disks must have a high surface hardness and in particular a high resistance to abrasive stress.
  • these components can be formed particularly advantageously from a polyamide.
  • any material, in particular plastic can be considered which has comparable surface properties, damping properties and elastic properties.
  • Annulus of the housing part is at least one sealing ring according to the features of claim 17.
  • An essential effect of the sealing ring is that the running disks are insulated from the hardenable medium, for example a mortar suspension flowing through the adapter part, so that the running disks are in any case not exposed to the abrasive effect of this medium.
  • the housing part Since the housing part has a symmetrical structure according to the features of claim 19, it can be pushed onto the base body with changing axial orientation relative to the ring shoulder 7.
  • claims 20 to 22 are directed to a further embodiment of the adapter part.
  • This adapter part is mounted on the outside of the base body via soft metal rings, which in turn are arranged in an insulated manner against the abrasive effects of a hardenable medium flowing through the adapter part via special sealing rings.
  • An axial damping effect of the impact stresses transmitted from the percussion drilling operation to the housing part is prevented by the fact that the housing part is axially elastically supported on both sides by sealing rings, movements of the basic body acting in the axial direction due to deformation of these sealing rings be collected elastically, so that the housing part is protected against excessive mechanical stress.
  • the running disks in addition to the radial bearing function, simultaneously fulfill the function of an axially acting damper. f ⁇ ngsk ⁇ rpers, which rests on the annular shoulder 7 of the basic body.
  • Figure 1 shows a first embodiment of an adapter part in axial section.
  • FIG. 2 shows a second exemplary embodiment of an adapter part in axial section
  • Fig. 3 is an end view of the adapter part of FIG. 2 according to arrow III.
  • FIG. 1 in FIG. 1 denotes a tubular base body, the two end regions of which each form coupling sections 2, 3, which are equipped with an internal thread designed in the manner of a round thread.
  • the coupling section 2 is used to couple a drill drive, while the coupling section 3 is used to couple an anchor rod.
  • the coupling section 2 ends axially in the continuous partition 4.
  • the cavity 5 designates a central cavity within the base body 1, which is located on the side of the partition 4 facing away from the coupling section 2 and is in continuous connection with the coupling section 3.
  • the cavity 5 also has a number of continuous radial bores 6 uniformly distributed in the circumferential direction, the meaning of which is given below will be explained later.
  • the area of the bores 6 of the basic body 1 is surrounded by a ring-like housing part 8, which in its central area delimits an annular space 9 in the axial and radially outer direction, which surrounds the outside of the basic body 1.
  • This annular space 9 is thus in continuous communication with the cavity 5 via the bore 6 / the bores 6.
  • the annular space 5 is in continuous communication with a pipe connection 11 via a radial bore 10 of the housing part 8.
  • the base body 1 is mounted rotatably relative to the housing part 8 and for this purpose soft metal rings 12 are arranged on both sides of the bore 6 / the bores 6, which are made of brass, for example, and which are in sliding contact with the outside of the base body 1.
  • the soft metal rings 12 have an approximately square cross section and are inserted in the radially inner recesses of the housing part 8 in such a way that their outer end faces each lie in a common plane with the remaining end face of the housing part. These soft metal rings thus serve to support the base body 1 within the housing part 8.
  • sealing rings 13 each denote sealing rings which are inserted in the ring grooves of the outer end faces of the housing part 8. sets are.
  • the sealing rings 13 are in the installed state under elastic tension, with a slight gap between the facing end face of a cover ring 14 or the ring shoulder 7 and the facing end faces of the housing part 8, which gap is bridged by the sealing ring 13.
  • two further sealing rings or wiper rings located on both sides of the bore 10 are designated, which are inserted into the ring grooves of the housing part 8, on the radial inside thereof. These sealing rings 15 are thus in radially inside contact with the outside of the base body 1.
  • the cover ring 14 is in turn connected to the base body 1 via a locking pin 16 in a rotational connection. For the rest, it is axially supported on its side facing away from the housing part 8 with the interposition of an elastic buffer member 17, here a round cord ring on an intermediate disk 18, which in turn axially on its side facing away from the buffer member 17 axially via a releasable locking disk 19 is set.
  • the locking washer 19, the intermediate washer 18, the buffer member 17 and the cover ring 14 are connected in a torsionally rigid manner to the base body 1. After the coupling section 2 is connected to the drill drive, a torque, but also axial forces, are transmitted via the latter, but the latter is only strongly damped due to the action of the buffer member 17 and the sealing rings 13 in connection with the slight axial gaps on both sides of the housing part 18 the housing part 8 are transmitted. These axial forces result in slight axial movements of the housing part 8 on the base body 1 and they are mentioned column dimensioned accordingly on both sides of the housing part 8.
  • the bore 10 has a slightly conical design in the area of the axially relatively moving surface and is shown in the drawing indicated extensions 20 on.
  • the pipe connection 11 can optionally be operated with a flushing medium, for example, via a corresponding switching device (not shown in the drawing) when the adapter part is in operation Water or air or with a curable medium, e.g. a mortar suspension or a synthetic resin are applied, these media being transferred via the bores 10, 6, the cavity 5 and the coupling part 3 into an anchor rod of a self-drilling anchor.
  • a flushing medium for example, via a corresponding switching device (not shown in the drawing) when the adapter part is in operation
  • Water or air or with a curable medium, e.g. a mortar suspension or a synthetic resin are applied, these media being transferred via the bores 10, 6, the cavity 5 and the coupling part 3 into an anchor rod of a self-drilling anchor.
  • the housing part 8 can also be provided with two pipe connections 11, for example diametrically opposite one another, each of which is supplied with a flushing medium or with a hardenable medium with the interposition of flow control elements.
  • the housing part 20 in turn encloses an annular space 21 in the axial direction and in the radially outward direction, which is in continuous connection with the central cavity 5 via at least one radial bore 6 of the base body 1 '.
  • This annular space 21 is also in continuous connection with the pipe connection 11 via a radial bore 22, the radial bore 22 extending coaxially with the inner cross section of the pipe connection 11.
  • several pipe connections 11 can also be provided, which are connected to the annular space 21 via corresponding bores 22.
  • the bore 6 is designed as an elongated hole, the relatively larger cross-sectional axis of which extends parallel to the axis of the housing part 20. Two or more such holes 6 are expediently provided in a uniform circumferential distribution.
  • the pipe connection 11 is supported on the housing part 20 via a gusset plate 23.
  • This annular space 21 extends axially on both sides considerably beyond the dimensions of the bore 6. Since the outside 25 of the base body 1 'is a sealing surface, it is ensured in this way that axial relative movements between the base body 1' and the housing part 20, which are caused by a percussion drilling operation, occur exclusively in the area of the sealing means. area.
  • pulleys which have an angular shape in cross-section, cover the respective end faces of the housing part 20 and the inside circumference in a corresponding recess
  • Protrude housing part 20 Protrude housing part 20.
  • the running disks 26 are screwed to the housing part 20 and are preferably made of polyamide or a comparable material, in particular plastic. It is essential in this connection that the material used here has damping properties and at the same time a high wear resistance, in particular in the surface area.
  • the base body 1 ' is in turn rotatably mounted with respect to the housing part 20, there being a sliding contact between the surfaces of the running disks 26, the sealing rings 24 and the surface sections of the base body 1' facing them.
  • the forces transmitted via the radial support surface 7 'of the ring shoulder 7 during percussion drilling operation are transmitted to the housing part 20 in a strongly damped manner via the running disks 26, so that there is no excessive stress on the latter.
  • the gusset plate 23 provides a particularly reliable fixation of the pipe connection 11, which also takes account of the axial stresses mentioned.
  • the housing part 20 is symmetrical with respect to a central plane 27 which extends perpendicular to its longitudinal axis.
  • an injection drill anchor known per se which has an adapter part described above is connected to a drilling drive, the drilling method according to the mountain conditions found in a conventional manner using a customary flushing medium or, in deviation from this, using a mixture, consist of a flushing medium and a hardenable medium or else directly and carried out exclusively using a hardenable medium, the choice of the medium guided over the injection drill anchor during the drilling phase being made dependent on the rock conditions found.
  • the drilling drive is arranged on a guide which is used to support the anchor, starting with the drilling phase, until the borehole is completely filled. The latter brings with it a considerable simplification of otherwise necessary manual activities in connection with the setting of a rock anchor.
  • a drilling mount is used as a guide, which is supported, for example, on a vehicle or in some other way.
  • the housing part of the adapter is always connected to structural elements of the base body with an intermediate arrangement of elastically deformable intermediate bodies such as sealing rings, thrust washers, buffer bodies or the like, so that axial movements of the base body can be absorbed with elastic deformation of the intermediate bodies mentioned, without one there is excessive mechanical stress on the housing part.
  • the housing part can also be removed in a very simple manner on one side of the base body, so that parts of the adapter part which are susceptible to wear are arranged so that they can be replaced easily.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)

Abstract

Un procédé de pose d'un boulon d'ancrage au moyen d'un tirant autoforeur se caractérise en ce que la tige foreuse d'ancrage est couplée par un adaptateur à un mécanisme de forage. Un milieu de rinçage, par exemple de l'eau ou de l'air, ou un milieu durcissable, par exemple une suspension de mortier, peut s'écouler sélectivement à travers l'adaptateur. L'état d'accouplement entre l'adaptateur, le mécanisme de forage et la tige foreuse d'ancrage est maintenu du début de la phase de forage jusqu'au remplissage complet du trou de forage avec le milieu durcissable. Si nécessaire, on peut également utiliser le raccord (11) de l'adaptateur, qui est fixe par rapport au corps de base (1'), pour régler en continu le mélange de milieu de rinçage et de suspension de mortier qui s'écoule à travers la cavité centrale (5) et la section d'accouplement (3), du corps de base (1') jusqu'à la tige foreuse d'ancrage. L'adaptateur permet de simplifier de manière significative le procédé de pose d'un boulon d'ancrage, étant donné qu'il rend superflues de nombreuses opérations de montage et de démontage qui sont autrement nécessaires dans la zone du mécanisme de forage à la fin de la phase de forage.
PCT/EP1995/003574 1994-09-13 1995-09-12 Procede de pose d'un boulon d'ancrage et adaptateur utilise pour mettre en oeuvre ce procede WO1996008606A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95932715A EP0803014A1 (fr) 1994-09-13 1995-09-12 Procede de pose d'un boulon d'ancrage et adaptateur utilise pour mettre en oeuvre ce procede
AU35658/95A AU3565895A (en) 1994-09-13 1995-09-12 Process for setting roof bolts and adapter used for carrying out this process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEP4432472.3 1994-09-13
DE4432472A DE4432472C2 (de) 1994-09-13 1994-09-13 Adapterteil zum Verbinden eines Bohrantriebs mit einem selbstbohrenden Anker

Publications (1)

Publication Number Publication Date
WO1996008606A1 true WO1996008606A1 (fr) 1996-03-21

Family

ID=6528032

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1995/003574 WO1996008606A1 (fr) 1994-09-13 1995-09-12 Procede de pose d'un boulon d'ancrage et adaptateur utilise pour mettre en oeuvre ce procede

Country Status (5)

Country Link
EP (1) EP0803014A1 (fr)
AU (1) AU3565895A (fr)
DE (1) DE4432472C2 (fr)
TW (1) TW288077B (fr)
WO (1) WO1996008606A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2009201844B2 (en) * 2008-06-09 2011-03-31 DSI Underground Australia Pty Limited Adaptor for setting a self-drilling, chemically anchored, fastening element
US20150285014A1 (en) * 2012-11-21 2015-10-08 Atlas Copco Rock Drills Ab Device Relating To A Flushing Head For A Rock Drilling Machine And Rock Drilling Machine

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19607988A1 (de) * 1996-03-01 1997-09-04 Reburg Patentverwertungs Gmbh Kupplungseinrichtung
DE19638464A1 (de) * 1996-09-19 1998-03-26 Reburg Patentverwertungs Gmbh Einsteckende für einen Bohrantrieb
SE525690C2 (sv) 2003-05-12 2005-04-05 Atlas Copco Rock Drills Ab Anordning för bergbultning jämte för automatiserad bergbultning samt förfarande för bergbultning
WO2007095690A1 (fr) * 2006-02-24 2007-08-30 Commonwealth Scientific And Industrial Research Organisation Adaptateur pour boulon de stabilisation, ecrou d'injection de coulis, ecrou d'injection de coulis et boulon de stabilisation combines et procede pour les utiliser
TWI308033B (en) 2006-04-28 2009-03-21 Hon Hai Prec Ind Co Ltd Discharge lamp driving device and voltage detecting circuit thereof
CN101497271B (zh) * 2008-01-31 2011-02-16 研能科技股份有限公司 包含断墨元件的供墨匣
CN102108704B (zh) * 2010-12-20 2012-08-15 中铁隧道集团有限公司 振动平衡锚固装置
EP3199709B1 (fr) * 2016-02-01 2019-08-07 Blade Offshore Services Ltd. Appareil et procédé pour forer des cavités annulaires
CN114320195B (zh) * 2022-01-07 2023-08-22 西安石油大学 一种连续冲砂洗井用换向接头

Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0187637A2 (fr) * 1985-01-04 1986-07-16 Lam Ming Luen Tête de rotation
DE3840158A1 (de) * 1988-11-29 1990-05-31 Gd Anker Gmbh & Co Kg Verfahren zum setzen eines ankers und vorrichtung zur durchfuehrung des verfahrens
EP0413676A1 (fr) * 1989-08-14 1991-02-20 Smet-Boring N.V. Procédé de fixation d'ancrages

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Publication number Priority date Publication date Assignee Title
FI874966A (fi) * 1987-11-11 1989-05-12 Tampella Oy Ab Saett och anlaeggning foer uppfyllning av borrhaol.
DE9004176U1 (de) * 1990-04-11 1990-06-28 Bergwerksverband Gmbh, 4300 Essen Injektionsbohranker mit Transportschnecke

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0187637A2 (fr) * 1985-01-04 1986-07-16 Lam Ming Luen Tête de rotation
DE3840158A1 (de) * 1988-11-29 1990-05-31 Gd Anker Gmbh & Co Kg Verfahren zum setzen eines ankers und vorrichtung zur durchfuehrung des verfahrens
EP0413676A1 (fr) * 1989-08-14 1991-02-20 Smet-Boring N.V. Procédé de fixation d'ancrages

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2009201844B2 (en) * 2008-06-09 2011-03-31 DSI Underground Australia Pty Limited Adaptor for setting a self-drilling, chemically anchored, fastening element
US20150285014A1 (en) * 2012-11-21 2015-10-08 Atlas Copco Rock Drills Ab Device Relating To A Flushing Head For A Rock Drilling Machine And Rock Drilling Machine
JP2015536251A (ja) * 2012-11-21 2015-12-21 アトラス コプコ ロツク ドリルスアクチボラグ 削岩機のフラッシュヘッドに関わる装置及び該装置を備える削岩機
US10145189B2 (en) * 2012-11-21 2018-12-04 Epiroc Rock Drills Aktiebolag Device relating to a flushing head for a rock drilling machine and rock drilling machine

Also Published As

Publication number Publication date
EP0803014A1 (fr) 1997-10-29
AU3565895A (en) 1996-03-29
DE4432472A1 (de) 1996-03-14
DE4432472C2 (de) 1997-09-18
TW288077B (fr) 1996-10-11

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