EP0657617A1 - Trépan de roche - Google Patents

Trépan de roche Download PDF

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Publication number
EP0657617A1
EP0657617A1 EP94116965A EP94116965A EP0657617A1 EP 0657617 A1 EP0657617 A1 EP 0657617A1 EP 94116965 A EP94116965 A EP 94116965A EP 94116965 A EP94116965 A EP 94116965A EP 0657617 A1 EP0657617 A1 EP 0657617A1
Authority
EP
European Patent Office
Prior art keywords
drill head
main
rock drill
secondary cutting
main cutting
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.)
Granted
Application number
EP94116965A
Other languages
German (de)
English (en)
Other versions
EP0657617B1 (fr
Inventor
August Haussmann
Bernhard Moser
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.)
Robert Bosch Power Tools GmbH
Original Assignee
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Hawera Probst GmbH
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 Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG, Hawera Probst GmbH filed Critical Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Publication of EP0657617A1 publication Critical patent/EP0657617A1/fr
Application granted granted Critical
Publication of EP0657617B1 publication Critical patent/EP0657617B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
    • 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
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/58—Chisel-type inserts

Definitions

  • the invention relates to a rock drill according to the preamble of claim 1.
  • the rock drills with hard metal inserts are used to make holes in concrete, masonry, stone or the like.
  • the end face of the drill head is provided with at least one hard metal cutting plate, which generally extends over the entire diameter of the drill head and exerts a kind of chisel effect on the stoneware to be shredded due to the rotary hammering or rotary hammering drive.
  • the diameter of the borehole is determined by the outside diameter of the carbide insert.
  • Such tools have the disadvantage that the cutting edges of only one insert, particularly in the outer area, are subject to great wear and tear, so that the drilling progress decreases rapidly.
  • cross cutting elements In order to reduce the surface pressure on a single hard metal cutting plate and thus enlarge the standing sides of the drill head, so-called cross cutting elements have become known in which two secondary cutting plates are arranged at right angles to a main cutting plate (DE-A1 29 12 394).
  • the drill head is approximately rectangular in cross-section, with a circular cross-section per se with lateral flats to form large-scale drilling dust grooves.
  • the cross cutting elements are inserted symmetrically and centrally in the approximately rectangular cross-section, ie the main cutting plate runs in the center and parallel to the two drilling dust removal grooves.
  • Such an arrangement of a drilling head with a main cutting plate arranged parallel to the lateral drilling dust groove faces and secondary cutting plates perpendicular to it has the disadvantage that, in particular, the secondary cutting plates have only a very short length due to the rectangular cross-sectional shape of the drilling head, so as not to protrude too far into the drilling dust groove space .
  • the secondary cutting inserts which are shorter in their effective diameter, cannot consequently support the main cutting insert in the diameter range in which the diameter of the main cutting insert projects beyond the diameter of the secondary cutting insert.
  • Rock drills are also known from EP 0 281 997 B1 or EP 0 322 565 B1, which have an essentially square drill head cross section, the main cutting insert and two secondary cutting inserts perpendicular to it each connecting the corner points of the square cross section.
  • This arrangement has the advantage over the subject of the aforementioned publication that main and secondary cutting inserts have approximately the same outside diameter, so that the secondary cutting inserts provide effective support for the main cutting insert even in the radially outer region. So much for the cross section in one embodiment of these known drilling tools deviates from the square cross-section and leads to a rectangular cross-section, the subject of these known publications remains with an arrangement of the main cutting insert and secondary cutting insert oriented perpendicular to one another. As a result, in particular the secondary cutting plates open into the lateral area of the drilling dust grooves and may not be optimally supported by the drilling head.
  • the invention has for its object to improve a drill head geometry of the publications mentioned in such a way that a drilling tool with the largest possible drilling dust removal grooves is created, cross-cutting elements are integrated with optimal effect and service life. Furthermore, the drill head geometry should be designed in such a way that a more straightforward manufacturing process is achieved while at the same time improving the efficiency.
  • the basic idea of the invention is that the largest possible drill dust removal groove can be achieved particularly if the cross section of the drill head is approximately rectangular or diamond-shaped, the side flanks of the drill dust groove, which are preferably parallel to the longitudinal axis of the drill, being arranged in the direction of rotation of the drilling tool, leading to the main insert and the drilling dust groove is positioned immediately in front of the main insert.
  • the invention is based on the further finding that the outer diameter of the secondary cutting inserts is approximately the same size or only slightly smaller than the diameter of the main cutting insert which forms the nominal diameter.
  • the main cutting insert is also effectively supported in its radially outer region by the secondary cutting insert, in particular in the axial removal of drilling dust.
  • This knowledge results in a largely diagonal arrangement of the main cutting insert and the aligned secondary cutting inserts, which run approximately through the corner points of an approximately rectangular or diamond-shaped cross section of the drill head.
  • the arrangement of the main cutting insert and the secondary cutting insert which is provided at right angles to one another in the described prior art, is abandoned and an asymmetrical head geometry is selected, so that in the invention there is an acute angle between the main cutting insert and the secondary cutting insert trailing the main cutting insert.
  • the main insert and in particular the secondary inserts are optimally embedded in the drill head over almost their entire length. This applies in particular to the rear of the cutting inserts facing away from the load, but special soldering technology must be taken into account.
  • the asymmetrical distribution of the inserts also results in irregular action of the cutting edges during rotary impact drilling, which significantly improves the removal rate and significantly reduces the vibrations on the tool and thus on the machine. This results in an improvement in handling by the operator.
  • the cutting edges can always act on previously produced chisel notches and thus lead to vibration superimposition and a reduction in drilling performance. This is made more firm and predetermined by the law Rotational speed / impact ratio of the hammer drill caused. This regularity is interrupted by an asymmetrical arrangement of the inserts.
  • the configuration and arrangement of the cross-cutting elements according to the invention consequently ensures a defined borehole diameter, for example for a perfect dowel attachment, the main cutting insert, which is preferably somewhat larger in radial dimensions, being responsible for the radial clearing work as well as for the axial demolition work, and the additional secondary cutting plates, in particular the axial one Support demolition work in the radially outer area of the borehole and thus counter excessive wear of the main insert in this wear-prone outer area.
  • the rock drill 1 shown in a side view in FIG. 1 and in a plan view in FIGS. 2 and 3 consists of a drill head 2 with an adjoining, in particular two-start, feed helix 3 and a clamping shaft 4.
  • the drill head On its axially forward end face 5, the drill head has a main cutting plate 6 which extends over the entire diameter D of the drill head 2, the diameter D forming the borehole diameter or nominal diameter.
  • the main cutting plate 6 is inclined roof-shaped with a tip angle ⁇ ⁇ 130 ° and points Individual cutting edges 7, 8, which are arranged at 180 ° to each other.
  • the main cutting plate 6 has a plate thickness s 1 and a height of h 1. It is soldered into a continuous groove 9 in the drill head 2.
  • the individual cutting edges 7, 8 of the main cutting plate 6 each have a roof-shaped ground section 10, as is shown from the direction of the narrow end side (arrow 11).
  • the rock drill 1 also has two secondary cutting plates 12, 13 which are arranged at an acute angle ⁇ 1 to the leading main cutting plate 6, the angle ⁇ 1 being approximately ⁇ 1 ⁇ 60 to 90 ° and in particular ⁇ 1 ⁇ 75 °.
  • the two secondary cutting plates 12, 13 are likewise designed as roof-shaped cutting elements in a side view, as is explained in more detail in the applicant's EP 0 322 565 B1. We therefore refer to this publication.
  • the secondary cutting plates 12, 13 therefore represent a reduced embodiment of the main cutting plate 6.
  • the cross section of the drill head 2 is essentially rectangular, this cross section being made by flattening a circular cylindrical cross section with the diameter d 1, the diameter d 1 being the helical shank diameter d1 corresponds to the conveyor helix 3.
  • two laterally opposite circular segments 14 are cut off, so that it comes to the two opposite, largely axially parallel side flanks 15, 16 with a side length l 1, the segments 14 forming part of the drilling dust groove.
  • the approximately rectangular cross section of the drill head is accordingly determined by the two opposite side flanks 15, 16 and by the two connecting the side flanks 15, 16 Arc sections 17, 18 formed, which lie on the circle with the diameter d 1.
  • the side flanks 15, 16 can also have a light convex (16 ') or light concave (16'') outer surface.
  • the two end points of the side flank 15 are provided with reference symbols 19, 20, the two end points of the side flank 16 with the reference symbols 21, 22 in FIG. 3.
  • the connection of the two opposite side points 19, 22 forms the chord 23.
  • a chord 24 is formed by the connection of the corner points 20, 21.
  • the length l2 of the two tendons 23, 24 and thus the distance l2 of the two mutually parallel side flanks 15, 16 is approximately the same as the length l1 of the side flanks 15, 16 itself (l1 ⁇ l2), d. H.
  • the corner points 19 to 22 lie approximately on a square cross section.
  • the rectangular cross section is formed by a lateral attachment of circular segment sections 25, 26 to form the two circular arc sections 17, 18.
  • the cross section of the drill head can, however, also be designed to be more elongated, where l 1> l 2.
  • the passage area of the circular segments 14 becomes larger and the areas of the circular segment sections 25, 26 become smaller. This increases the drilling dust removal groove.
  • the main cutting plate 6 lies diagonally in the square or rectangle formed by the corner points 19 to 22.
  • the main cutting plate 6 connects approximately the corner points 19, 21, ie the chip space 27 formed, inter alia, by the circular segment surface 14 lies ahead of the main cutting edge 10 of the main cutting plate 6 with respect to the direction of rotation 28 of the tool.
  • the radially outer cutting edge 36 of the main cutting plate 6 projects here far into the Bohrmehlnuten Scheme 27 in (width s3 in Fig. 1), so that a high clearing work can be achieved.
  • the main cutting insert performs its main removal work, it is exposed in the direction of the drill bit groove in order to optimally convey the drill bit into the drill bit groove.
  • the main cutting plate 6 is optimally supported in the drill head.
  • the main cutting plate 6 has a diameter D, which leads to a borehole diameter d.
  • the chip space 27 lying in front of the side flanks 15, 16 is accordingly formed by the circular segment sections 14 with the circular diameter d 1 plus an annular section 29 with the diameter d.
  • the diameter D of the main insert 6 or the associated circle with the diameter d forms the nominal borehole diameter.
  • the lateral projection over the helix diameter d 1 is chosen in a known manner.
  • the angle ⁇ 3 between the vertical plane 32 leading through the corner points 19, 21 and through The corner points 20, 22 leading vertical plane 31 is approximately ⁇ 3 ⁇ 90 °.
  • the leading main cutting insert and the trailing secondary cutting insert form an acute angle ⁇ 1.
  • the circular segment section 25, 26 lying in the direction of rotation in front of the respective secondary cutting plate 12, 13 can optionally be cut outwards from the intersection 39 of the secondary cutting plate and circular arc section 17, 18 (line 37, 38), since this "remaining segment section" does not provide any significant support Has more effect.
  • the change of lines 37, 38 as the outer contour leads to the exemplary embodiment according to FIG. 4 as described below.
  • the diameter d3 of the two aligned secondary cutting plates 12, 13 is the same size or slightly smaller than the diameter D of the main cutting plate 6 (d3 ⁇ D).
  • the diameter d 3 is preferably chosen to be somewhat smaller than the diameter of the main cutting plate 6, in order to leave the radial clearing work essentially to the main cutting plate 6, which is thicker in thickness s 1.
  • the radially outer regions of the cutting plates 12, 13 are identified by reference number 33, and the radially inner regions by reference number 34.
  • the radially outer regions 33 lie on the same conical surface 35 which is formed by the circumferential cutting edges of the main cutting plate 6 (FIG. 1).
  • the two inner regions 34 of the respective secondary cutting plate 12, 13 run downward according to a roof angle ⁇ corresponding to the main cutting plate 6 towards the center of the drill.
  • the radially inner regions 34 can, however, also run horizontally towards the center of the drill from the center of the respective secondary cutting insert.
  • FIG. 4 shows a further exemplary embodiment of the invention, in which the consequent further development of a head geometry according to the exemplary embodiment according to FIG. 3 has also been carried out in particular with regard to soldering technology.
  • the same parts are provided with the same reference numerals, so that reference is expressly made to the description of the exemplary embodiment according to FIG. 3.
  • the rock drill shown in plan view according to FIG. 4 has a drill head 2 ', which has an approximately diamond-shaped cross section, the corner points of the diamond being identified by the reference numerals 40 to 43.
  • the connecting line of the diamond points 40, 41 forms the side flank 15 'of the drill head to form the drilling dust groove or the chip space 27'
  • the connecting line of the corner points 42, 43 likewise forms the side flank 16 'arranged parallel to the side flank 15' to form the opposing chip space 27 '.
  • the respective chip space lies within the circle segments 14 formed by the circumference with diameter D.
  • the two corner points 41, 43 lie outside the circumference formed by the nominal diameter D, while the two corner points 40, 42 of the diamond lie within the drill head diameter d 1.
  • the connecting line 44 of the two diamond corner points 40, 42 and the connecting line 45 of the two diamond corner points 41, 43 form a diamond cross, which runs through the center 46 of the drill head cross section or the longitudinal axis of symmetry of the drilling tool.
  • the connecting line 44 is almost perpendicular to the longitudinal symmetry plane 47 through the secondary cutting plates 12, 13, while the connecting line 45 forms an angle ⁇ 4 ⁇ 2 to 5 ° to this.
  • the axes 44, 45 are therefore not perpendicular to one another.
  • the area between the respective secondary cutting insert 12, 13 and the leading main cutting insert 7, 8 is designed in the embodiment according to FIG. 4 in such a way that an arcuate course 48 initially results over approximately one third of the intermediate segment segment section, which extends up to point 49 on the circumference of the drill head 50 with the diameter d 1 is sufficient. From this point 49, the two axially parallel side flanks 37 ', 38' run on the diamond connecting line 41, 42 and 40, 43 to form the drill head. The side surfaces 37 ', 38' run parallel to one another. This results in an additional chip space or drilling dust space 51, 52 which lies between the side flanks 37 ', 38' and the circumference formed by the outer diameter D.
  • the arrangement of the main insert 6 in the area of the specified diamond head diamond is therefore such that the drill head opens completely into a side flank 37 ', 38', so that this side flank is extended on the opposite side of the main insert by the amount s2.
  • the side flanks and in particular the front cutting edges 53, 54 of the side cutting edges 7, 8 therefore do not run through the corners 40, 42 of the diamond cross section, but are slightly set back relative to this by the amount s 2. This creates stable, defined edges and surfaces for the soldering process, which prevent a thermally unfavorable tip from being present here.
  • the side flanks 15 ', 16' to form the main drilling dust grooves and the side flanks 37 ', 38' to form the secondary drilling dust grooves 51, 52 are in each case axially parallel and overall parallel to one another, so that they can be produced in one manufacturing process for each side pair.
  • the arrangement of the aligned cutting inserts 12, 13 with their longitudinal plane of symmetry 47 compared to the arrangement of the main cutting plate with their longitudinal plane of symmetry 32 is again by the angle ⁇ ⁇ 70 ° given.
  • the outer diameter of the secondary cutting inserts 12, 13 lies approximately on the outer diameter D of the main cutting insert.
  • the secondary cutting plates lie approximately with their longitudinal plane of symmetry 47 in the area of the longitudinal axis 45 of the diamond, the longitudinal axis 45 of the diamond being arranged leading by the angle ⁇ 4 in the direction of rotation 28 of the drilling tool.
  • the secondary cutting plates 12, 13 are embedded in the circular arc continued by the circular segment section 48 on both flanks, the end points 55, 56 on the circular arc simultaneously representing the end point of the side flanks 15 ', 16' in FIG. 4.
  • the arc section 49, 55 or 49, 56 is characterized by ⁇ 6 ⁇ 30 °.
  • the angle ⁇ 7 ⁇ 20 ° indicates the leading angle from the longitudinal plane of symmetry 47 of the secondary cutting plates 12, 13 to the angle beam 57 through the point 49.
  • the side flanks 37 ', 38' start from this point 49.
  • the drill head diameter d 1 in Fig. 4 also forms the helical shaft diameter, as shown in Fig. 1.

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
EP94116965A 1993-12-11 1994-10-27 Trépan de roche Expired - Lifetime EP0657617B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4342324 1993-12-11
DE4342324 1993-12-11
DE4407119A DE4407119A1 (de) 1993-12-11 1994-03-04 Gesteinsbohrer
DE4407119 1994-03-04

Publications (2)

Publication Number Publication Date
EP0657617A1 true EP0657617A1 (fr) 1995-06-14
EP0657617B1 EP0657617B1 (fr) 1999-08-18

Family

ID=25931992

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94116965A Expired - Lifetime EP0657617B1 (fr) 1993-12-11 1994-10-27 Trépan de roche

Country Status (5)

Country Link
US (1) US5482124A (fr)
EP (1) EP0657617B1 (fr)
CN (1) CN1056900C (fr)
DE (2) DE4407119A1 (fr)
DK (1) DK0657617T3 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0763649A1 (fr) * 1995-09-18 1997-03-19 Diager S.A. Partie coupante d'un foret
EP0778391A2 (fr) * 1995-12-07 1997-06-11 HILTI Aktiengesellschaft Perceuse rotative hélicoidale à percussion
EP1045112A1 (fr) * 1999-04-15 2000-10-18 HILTI Aktiengesellschaft Broche à pierre
EP1125664A2 (fr) * 2000-02-16 2001-08-22 HILTI Aktiengesellschaft Outil de forage pour pierre
WO2001065048A2 (fr) 2000-03-02 2001-09-07 Hawera Probst Gmbh Perforatrice de roches
EP1405984A1 (fr) 2002-10-03 2004-04-07 Black & Decker Inc. Foret à rocher
DE19537900B4 (de) * 1995-10-11 2005-11-03 Irwin Industrial Tool Company (N.D.Ges.D. Staates Delaware), Freeport Drehbohrer
EP3437773A1 (fr) * 2017-08-03 2019-02-06 DreBo Werkzeugfabrik GmbH Foret

Families Citing this family (24)

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Publication number Priority date Publication date Assignee Title
JP3819439B2 (ja) * 1996-11-11 2006-09-06 ハヴェラ プロープスト ゲーエムベーハー さく岩機
DE19703994B4 (de) * 1997-02-03 2006-04-20 Drebo Werkzeugfabrik Gmbh Bohrer
DE19724373A1 (de) * 1997-06-10 1998-12-17 Hilti Ag Gesteinsbohrer
DE19807394A1 (de) * 1998-02-21 1999-08-26 Hilti Ag Bohr- und/oder Meisselwerkzeug
US6039127A (en) * 1998-03-13 2000-03-21 Loudon Enterprises, Inc. Rock drill
US6374931B1 (en) 1999-11-03 2002-04-23 Relton Corporation Multiple cutter rotary hammer bit
US7097396B1 (en) * 2000-02-16 2006-08-29 Kabushiki Kaisha Miyanaga Drill bit
DE10024433A1 (de) * 2000-05-19 2001-11-29 Hawera Probst Gmbh Gesteinsbohrer
DE10050229C1 (de) * 2000-10-11 2002-02-21 Hilti Ag Wendelbohrer für Gestein
EP1302290B1 (fr) 2001-10-12 2008-07-02 Robert Bosch Gmbh Outil de forage
LU90862B1 (de) * 2001-12-17 2003-06-18 Cerametal Sarl Schlag-oder Hammerbohrer
WO2003103914A1 (fr) * 2002-06-06 2003-12-18 株式会社ミヤナガ Outil de forage
GB2404889A (en) * 2003-08-12 2005-02-16 Black & Decker Inc A cutting plate for a drill bit
DE10351183A1 (de) * 2003-11-03 2005-06-02 Illinois Tool Works Inc., Glenview Gesteinsbohrer
US7861807B2 (en) 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head
DE102008054869B4 (de) * 2008-12-18 2010-09-02 Hilti Aktiengesellschaft Bohrkopf für Gesteinsbohrer
DE102010041238A1 (de) 2009-12-30 2011-07-07 Robert Bosch GmbH, 70469 Gesteinsbohrwerkzeug zur dreh-schlagenden Bearbeitung von Beton, Gestein, Mauerwerk und dergleichen Materialien
EP2669033B1 (fr) 2012-05-29 2015-11-04 Black & Decker Inc. Tête de coupe pour un foret.
CN103046544B (zh) * 2013-01-25 2015-07-15 汤保新 自旋桩、自旋桩腰及自旋桩头
US9303511B2 (en) 2013-04-26 2016-04-05 Kennametal Inc. Flat cutter bit with cutting insert having edge preparation
US9347276B2 (en) 2013-04-26 2016-05-24 Kennametal Inc. Two prong rotary drill bit with cutting insert having edge preparation
US9428968B2 (en) * 2013-04-26 2016-08-30 Kennametal Inc. Rotary drill bit with cutting insert having edge preparation
KR101627152B1 (ko) * 2014-05-15 2016-06-03 서재연 나선홈 및 유로가 구비된 회전식 저마찰 브레이커용 치즐
US10507534B2 (en) 2016-03-17 2019-12-17 O-Tags, Inc. Systems, methods, and apparatus for reliably installing survey tags

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DE4306981A1 (de) * 1993-03-05 1994-09-08 Keil Werkzeugfabrik Karl Eisch Bohrer für Gestein oder dergleichen

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DE3538191C2 (de) * 1985-10-26 1996-09-19 Hilti Ag Gesteinsbohrer
DE3707798A1 (de) * 1987-03-11 1988-09-22 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE3742661A1 (de) * 1987-12-16 1989-07-13 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE3820695C2 (de) * 1988-06-18 1996-07-25 Hawera Probst Kg Hartmetall Gesteinsbohrer

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Publication number Priority date Publication date Assignee Title
DE1916435A1 (de) * 1969-03-31 1970-11-05 Hawera Probst Kg Hartmetall Gesteinsbohrer
FR2074491A5 (fr) * 1969-12-30 1971-10-01 Hawera Probst Kg Hartmetall
DE3025890A1 (de) * 1980-07-09 1982-01-21 Westa Werkzeugbau Gmbh, 8130 Starnberg Bohrer fuer bohrhaemmer, insbes. zum bohren in gestein, beton o.dgl.
DE4306981A1 (de) * 1993-03-05 1994-09-08 Keil Werkzeugfabrik Karl Eisch Bohrer für Gestein oder dergleichen

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0763649A1 (fr) * 1995-09-18 1997-03-19 Diager S.A. Partie coupante d'un foret
FR2738762A1 (fr) * 1995-09-18 1997-03-21 Diager Partie coupante d'un foret
DE19537900B4 (de) * 1995-10-11 2005-11-03 Irwin Industrial Tool Company (N.D.Ges.D. Staates Delaware), Freeport Drehbohrer
EP0778391A2 (fr) * 1995-12-07 1997-06-11 HILTI Aktiengesellschaft Perceuse rotative hélicoidale à percussion
EP0778391A3 (fr) * 1995-12-07 1998-07-01 HILTI Aktiengesellschaft Perceuse rotative hélicoidale à percussion
US6283232B1 (en) 1999-04-15 2001-09-04 Hilti Aktiengesellschaft Rock drill
EP1045112A1 (fr) * 1999-04-15 2000-10-18 HILTI Aktiengesellschaft Broche à pierre
EP1125664A2 (fr) * 2000-02-16 2001-08-22 HILTI Aktiengesellschaft Outil de forage pour pierre
EP1125664A3 (fr) * 2000-02-16 2002-06-05 HILTI Aktiengesellschaft Outil de forage pour pierre
WO2001065048A2 (fr) 2000-03-02 2001-09-07 Hawera Probst Gmbh Perforatrice de roches
US6910838B2 (en) 2000-03-02 2005-06-28 Hawera Probst, Gmbh Rock drill
EP1405984A1 (fr) 2002-10-03 2004-04-07 Black & Decker Inc. Foret à rocher
US7137461B2 (en) 2002-10-03 2006-11-21 Black & Decker, Inc. Masonry drilling tool
EP3437773A1 (fr) * 2017-08-03 2019-02-06 DreBo Werkzeugfabrik GmbH Foret

Also Published As

Publication number Publication date
US5482124A (en) 1996-01-09
DK0657617T3 (da) 2000-03-20
CN1107201A (zh) 1995-08-23
EP0657617B1 (fr) 1999-08-18
DE59408638D1 (de) 1999-09-23
DE4407119A1 (de) 1995-06-14
CN1056900C (zh) 2000-09-27

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