EP2468427B1 - Outil et procédé destinés au nettoyage d'un trou de forage - Google Patents

Outil et procédé destinés au nettoyage d'un trou de forage Download PDF

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Publication number
EP2468427B1
EP2468427B1 EP11190089.0A EP11190089A EP2468427B1 EP 2468427 B1 EP2468427 B1 EP 2468427B1 EP 11190089 A EP11190089 A EP 11190089A EP 2468427 B1 EP2468427 B1 EP 2468427B1
Authority
EP
European Patent Office
Prior art keywords
tool
feeding member
brush
shank
borehole
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.)
Not-in-force
Application number
EP11190089.0A
Other languages
German (de)
English (en)
Other versions
EP2468427A3 (fr
EP2468427A2 (fr
Inventor
Herbert Ginter
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to PL11190089T priority Critical patent/PL2468427T3/pl
Publication of EP2468427A2 publication Critical patent/EP2468427A2/fr
Publication of EP2468427A3 publication Critical patent/EP2468427A3/fr
Application granted granted Critical
Publication of EP2468427B1 publication Critical patent/EP2468427B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B13/00—Brushes with driven brush bodies or carriers
    • A46B13/001—Cylindrical or annular brush bodies
    • A46B13/006—Cylindrical or annular brush bodies formed by winding a strip tuft in a helix about the body
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B9/00—Arrangements of the bristles in the brush body
    • A46B9/06—Arrangement of mixed bristles or tufts of bristles, e.g. wire, fibre, rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/12—Brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/02—Accessories specially adapted for use with machines or devices of the preceding groups for removing or laying dust, e.g. by spraying liquids; for cooling work
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B15/00—Other brushes; Brushes with additional arrangements
    • A46B15/0002—Arrangements for enhancing monitoring or controlling the brushing process
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B2200/00—Brushes characterized by their functions, uses or applications
    • A46B2200/30—Brushes for cleaning or polishing
    • A46B2200/3013—Brushes for cleaning the inside or the outside of tubes
    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46B—BRUSHES
    • A46B5/00—Brush bodies; Handles integral with brushware
    • A46B5/02—Brush bodies; Handles integral with brushware specially shaped for holding by the hand

Definitions

  • the invention relates to a tool and a method for cleaning a borehole in preferably conventional construction materials.
  • a bore is often introduced into an existing component and anchored in this hole a fastener.
  • the drilling is usually done by means of a drill.
  • loose material cuttings and drilling dust
  • component materials such as concrete, natural stone or solid brick, the amount of material depending on the borehole size and the drilling angle (eg vertically downwards, horizontally or vertically upwards) and vertically downwards or horizontally about 5-25% of the well volume.
  • the drill cuttings and the drilling dust must be removed prior to the attachment of the fastener in order to establish a secure and permanent connection.
  • the sustainability and durability of the attachment depends largely on the quality of the well treatment.
  • Borehole cleaning is an essential part of the fastener placement process, both in terms of time, tools and equipment needed, and in terms of fixing quality.
  • sucking in addition to a suitable vacuum cleaner also adapted to the respective hole diameter and the respective hole depth suction tubes are needed because the drilling dust must be extracted at the bottom of the hole.
  • blowing out the borehole compressed air is required for effective cleaning, especially for larger boreholes.
  • the blown drilling dust leads to considerable dust pollution and thus to health problems for the operator performing.
  • the DE 39 19 095 A1 discloses a drilling tool, in particular a rock drill, which is intended to allow a discharge of the drilling dust during manufacture of the borehole by a spiral shaft of the drilling tool having brush elements which are arranged in the groove bottom of a conventional drilling tool or form helical conveying helices.
  • the outside diameter of the spiral shaft of a conventional drilling tool is significantly less than the inside diameter of the resulting bore so that cuttings and drilling dust can trickle radially between the spiral shaft and the borehole wall to the bottom of the borehole.
  • radially projecting brush elements allow a cleaning of the borehole wall of adhering drill dust, but remove the detached and the borehole ground Bohrdaub not completely from the well, since the loose material can fall through the brush towards the bottom of the well, especially if the brush rubs against the borehole wall as the boring tool rotates.
  • the object of the invention is to provide a tool for cleaning a borehole, which frees a pre-fabricated wellbore in a simple and quick cleaning process of cuttings and drilling dust with little equipment and low dust load for the user.
  • a tool for cleaning a borehole with a tool shank, which has an axial actuating end and an opposite axial cleaning end with respect to a shaft axis, and at least one conveying element for removing drilling dust from the borehole, which is attached to the tool shank and is arranged in the axial direction helically around the tool shank, wherein the conveying element is formed as an open towards the operating end groove.
  • a helical groove By means of such a helical groove, cuttings and drilling dust can be removed very simply and efficiently in the manner of a corkscrew (drilling into the borehole) in combination with an Archimedean screw (after screwing in) from the bottom of the borehole.
  • the helical groove can be designed to be both right-handed and left-handed.
  • the conveying element is designed as a conveyor belt with a continuous, in particular dust-impermeable transport surface.
  • This continuous conveyor belt prevents, in contrast to brush elements, a "trickling" of drilling dust in the direction of the bottom of the borehole.
  • a longitudinal edge of the conveyor element adjoins the tool shank and is connected at least in sections to the tool shank.
  • Simple attachment options are, for example, gluing, clamping, welding or the like.
  • the conveying element may have a concave transport surface facing the operating end. Due to the concave design of the particular continuous and dust-impermeable transport surface increases the maximum transport volume of the conveying element. In addition, as the tool is removed from the wellbore, the drill cuttings and drill dust will remain better on the transport surface and will not immediately fall back into the wellbore.
  • the conveying element is preferably formed elastically in the radial direction.
  • the conveyor belt adapts advantageously to the sometimes somewhat rough and irregular surface of the borehole wall.
  • a tool having a delivery element whose outer diameter is slightly larger than the borehole diameter can then be introduced into a borehole having a predetermined borehole diameter.
  • a helical outer edge rests almost continuously on the borehole wall and prevents trickling of drilling dust between the conveying element and the borehole wall.
  • the conveying element may have a vertical projection at its radially outer edge.
  • the approach continues to increase the maximum transport volume of the conveyor element.
  • a hooking of the conveying element in the borehole wall and thus a hooking or setting of the entire tool is prevented when a tool with a conveying element is inserted or executed in a wellbore with a predetermined borehole diameter whose outer diameter is slightly larger than the borehole diameter.
  • the approach is preferably made of the same material as the conveying element and is preferred obtained by bending the radially outer edge of the conveying element, so that the conveying element and the approach are made in one piece.
  • the lug in particular if the material of the lug is other than that of the conveying element, the lug may be designed to be larger as required, ie if the outside diameter of the tool with the conveying element is greater than the borehole diameter or if Borehole wall is very uneven, positively or non-positively connected to the radially outer edge of the conveying element, such as plugged, glued or the like.
  • the approach can be arranged parallel to the guide axis of the tool shaft, wherein preferably the outer, free edge, which corresponds to the radially outer edge of the conveyor element, when the conveyor belt and the neck are integrally formed, be slightly bent towards tool shank, here too to prevent tilting.
  • the conveying element and the approach are integrally formed and have as a unit to the operating end facing, concave transport surface, the radius at the approach side area is significantly smaller than that on the shaft side area.
  • the width of the approach is to be chosen so that the function of the conveying element, namely to take cuttings and Bohrstaub is not affected, the width of the selected hole diameter and the outer diameter of the conveyor element depends.
  • the conveying element and the approach can be made of metal, in particular spring steel, or of plastic, wherein the conveying element and the approach can be made of different materials. These materials are particularly suitable because they are on the one hand flexible and elastic with appropriate selection and on the other hand also have a sufficiently high abrasion resistance. Incidentally, these materials are also available simply and inexpensively.
  • At least one radially outwardly extending brush for cleaning the borehole wall is attached to the tool shank.
  • the conveying element removes, namely at the borehole bottom befindliches, loose material with little dust and with low equipment cost, but offers room for improvement, which is the detachment of pressed against the borehole wall Drilling dust concerns. For this reason, the conveying element is combined with the brush, which, although having only a moderate transport capacity from the bottom of the well to the surface of the borehole, but the borehole wall excellent freed from drilling dust and adhering debris.
  • the brush In order to ensure a continuous contact of the brush with the borehole wall, the brush preferably extends radially further outward than the conveying element and thus, when rotated about the shaft axis, describes an outer diameter which is greater than the outer diameter of the conveying element.
  • the brush is preferably a strip brush arranged helically around the tool shank and which may be formed by a continuous bristle strip or a plurality of bristle tufts, wherein the bristle tufts are arranged along a helix around the tool shank.
  • This strip-shaped design and helical arrangement of the brush ensures on the one hand for an excellent cleaning performance on the borehole wall and on the other hand supports the conveying element in the conveyance of cuttings and drilling dust from the borehole bottom toward the surface.
  • the coil described by the brush assembly according to the invention may be formed both right-handed and left-handed.
  • the helical brush can in particular have the same pitch as the helical conveying element.
  • an axial distance to the conveying element in the direction of the actuating end is less than in the direction of the cleaning end.
  • the drilling dust released by the brush from the borehole wall can be absorbed particularly well by the section of the conveying element adjoining the cleaning end side.
  • the brush even directly adjoins a cleaning end surface of the conveyor element, whereby the bristles of the brush during the insertion of the tool into the well supported by the conveyor element and thus pressed more strongly to the borehole wall, so that the cleaning performance is increased.
  • the bristle material has a major influence on the cleaning performance and the wear of the brush, wherein the brush preferably has metal, plastic or natural bristles.
  • the conveying element extends axially closer to the cleaning end of the tool shaft than the brush.
  • the conveyor element leaves This will bring it very close to the bottom of the hole and there can remove the hole located at the bottom, loose cuttings much more effective than the brush.
  • a borehole can be cleaned so thoroughly with little equipment expenditure and with low dust load for the user that no drill cuttings or drilling dust or only a negligible amount of them remain in the borehole.
  • FIG. 1 shows a first embodiment of a tool 10 for cleaning a borehole 12 (see. FIG. 2 ), with a tool shank 14, which has an axial actuating end 16 and an opposite axial cleaning end 18 with respect to a shank axis A, and with at least one conveying element 20 for removing drilling dust 22 (and cuttings) from the wellbore 12, wherein the conveying element 20 attached to the tool shank 14, arranged in the axial direction helically around the tool shank 14 and formed as a groove 24 open towards the operating end 16.
  • the conveyor element 20 is a conveyor belt with a continuous, dust-impermeable transport surface 26, wherein a longitudinal edge of the helical conveying element 20 adjacent to the tool shank 14, preferably rests on the tool shank 14 or engages in the tool shank 14. Furthermore, the longitudinal edge of the conveyor element 20 is at least partially connected to the tool shank 14, for example, welded, glued, screwed or received in a helical groove of the tool shank 14 and pressed with the tool shank 14.
  • the channel 24 of the conveyor element 20 is formed by the actuating end 16 facing concave transport surface 26. Due to this concave shaping, the conveying element 20 can receive more cuttings and drilling dust 22 than a flat transport surface 26, which is only inclined to a radial direction of the tool shank 14. Of course, the illustrated, concave conveying element 20 may be inclined to the radial direction. This means that a radially outer end of the conveyor element 20 is closer to the actuating end 16 of the tool shaft 14 than a radially inner, adjacent to the tool shank 14 end of the conveyor element 20th
  • At least one radially outwardly extending brush 28 for cleaning a borehole wall 30 (cf. FIG. 2 ) attached.
  • the brush 28 extends radially outward than the conveying element 20 and thus describes an outer diameter d 28 , which is greater than an outer diameter d 20 of the conveying element 20 during rotation of the tool 10 about the shaft axis A.
  • an axial distance to the conveyor element 20 in the direction of the actuating end 16 is less than in the direction of the cleaning end 18.
  • the brush 28 even adjoins directly to a convex, the cleaning end 18 facing surface 32 of the conveyor element 20.
  • the brush 28 is a strip brush and, like the conveyor element 20, is arranged helically around the tool shaft 14.
  • the brush 28 can thereby form a strip brush from a continuous bristle strip or alternatively from several Borsten tufts may be formed, which are fastened along a helix on the tool shank 14.
  • the brush 28 has metal bristles, plastic bristles or natural bristles.
  • a frictional force of the brush 28 on the borehole wall 30 can also be influenced by a bristle diameter d 28 of the brush 28.
  • FIG. 1 extends the support member 20 axially closer to the cleaning end 18 of the tool shank 14 as the brush 28. This is due to the fact that in the area of a borehole bottom 34, the reception and removal of the accumulated cuttings or Bohrstaubs 22 are in the foreground. Brushing the borehole wall 30 near the bottom of the borehole 34 would make little sense if the borehole 12 is still filled with loose material in this area.
  • FIG. 2 shows the tool 10 according to a second embodiment, wherein the cleaning end 18 of the tool shaft 14 has already been introduced axially into the borehole 12 (arrow 36) and in the snapshot according to FIG. 2 is pulled out of the borehole 12 again in the opposite axial direction (arrow 38).
  • the second embodiment of the tool 10 according to FIG. 2 is identical to the first embodiment of the tool 10 according to FIG. 12 except for an actuator 40 at the actuating end 16 of the tool shank 14 FIG. 1 ,
  • the actuator 40 is according to FIG. 2 formed by a defined form-fitting contour, which for example can be positively inserted into the receptacle of a drill or frictionally engaged in the receptacle of an electrically operated screwdriver to operate the tool 10 by machine.
  • the borehole 12 is produced with a predetermined borehole diameter d 12 , wherein this borehole diameter d 12 is smaller than the outer diameter d 20 of the conveying element 20.
  • the tool 10 is axially inserted into the borehole 12 to clean it, with the impeller 20 elastically deformed so that its outer diameter d 20 is substantially equal to the borehole diameter d 12 .
  • concave design of the conveying element 20 is reinforced by the deformation during insertion into the wellbore 12, essentially only the concavity.
  • the mechanical stress and wear are relatively low, and the conveying element 20 thus achieves a satisfactory life.
  • the elasticity in the radial direction can best be achieved in that the conveying element 20 is made of metal, in particular spring steel, or of plastic. Both materials are available inexpensively, easy to mold and, if suitably selected, also have a high abrasion resistance.
  • the tool 10 is first inserted via the actuator 40 axially in the direction of the arrow 36 in the borehole 12 and then pulled out in the opposite direction again from the borehole 12 (see arrow 38). At least during insertion, but preferably also during withdrawal, the tool 10 is rotated about its shaft axis A (see arrow 42). The axial pressure or train on the tool 10 and the torque for rotation about the shaft axis A are thereby applied either manually or mechanically via the actuator 40.
  • the conveying element 20 digs into the loose material in the manner of a corkscrew in the region of the borehole bottom 34 until the cleaning end 18 of the tool shaft 14 has reached the borehole bottom 34.
  • the cuttings 22 are reliably removed from the borehole 12 because the radially inner edge of the impeller 20 is fixed continuously to the tool shank 14 and the radially outer edge is substantially dust-tight against the borehole wall 30 along slides.
  • the borehole 12 can be reliably and thoroughly cleaned of drill cuttings and drilling dust 22 with little expenditure on equipment and with low dust exposure of the user.
  • the tool application can be done manually or machine assisted.
  • the presented cleaning method by means of the tool 10 can be used both on dry and on wet ground.
  • the cleaning of the borehole 12 by means of the tool 10 is done thoroughly and quickly, and possibly even slightly different borehole diameter can be cleaned with one and the same tool 10.
  • the differences in diameter can namely be compensated to a certain extent by a lesser or greater deformation of the conveying element 20 and the optional brush 28.
  • FIGS. 3 and 4 show sections of embodiments of the tool according to the invention, in which the conveying element 20 has a lug 44, wherein from the FIG. 3 a vertical approach, ie the approach 44 is aligned parallel to the tool shank 14, and from the FIG. 4 a concave approach, ie the approach itself is also concave, but with a smaller radius compared to the conveyor element 20, it can be seen.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (13)

  1. Outil destiné à nettoyer un trou foré (12), comportant :
    une tige d'outil (14) comportant, par rapport à un axe de tige (A), une extrémité de manoeuvre axiale (16) et une extrémité de nettoyage axiale opposée (18),
    au moins un élément de transport (20) pour retirer de la poussière de forage (22) du trou foré (12), lequel élément de transport est fixé à la tige d'outil (14) et agencé hélicoïdalement autour de la tige d'outil (14) dans une direction axiale, dans lequel l'élément de transport (20) est configuré comme un canal ouvert (24) en direction de l'extrémité de manoeuvre (16), ainsi que
    au moins une brosse s'étendant radialement vers l'extérieur (28) pour nettoyer une paroi de trou foré (30), laquelle brosse est fixée à la tige d'outil (14),
    caractérisé en ce qu'en partant de la brosse (28), une distance axiale par rapport à l'élément de transport (20) en direction de l'extrémité de manoeuvre (16) est plus petite qu'en direction de l'extrémité de nettoyage (18).
  2. Outil selon la revendication 1, caractérisé en ce que l'élément de transport (20) est configuré comme une bande de transport avec une surface de transport continue (26).
  3. Outil selon l'une des revendications précédentes, caractérisé en ce que l'élément de transport (20) comporte une surface de transport concave (26), dirigée vers l'extrémité de manoeuvre (16).
  4. Outil selon l'une des revendications précédentes, caractérisé en ce que l'élément de transport (20) est réalisé élastique dans une direction radiale.
  5. Outil selon l'une des revendications précédentes, caractérisé en ce que l'élément de transport (20) est fabriqué en métal, en particulier en acier à ressorts, ou en matière plastique.
  6. Outil selon l'une des revendications précédentes, caractérisé en ce qu'un bord longitudinal de l'élément de transport (20) est adjacent à la tige d'outil (14) et est relié à la tige d'outil (14) au moins dans certaines parties.
  7. Outil selon l'une des revendications précédentes, caractérisé en ce que la brosse (28) est une brosse de raclage agencée hélicoïdalement autour de la tige d'outil (14).
  8. Outil selon l'une des revendications précédentes, caractérisé en ce que la brosse (28) comporte plusieurs touffes de poils qui sont disposées en particulier le long d'une hélice autour de la tige d'outil (14).
  9. Outil selon l'une des revendications précédentes, caractérisé en ce que la brosse (28) comporte des soies en métal, des soies en matière plastique ou des soies naturelles.
  10. Outil selon l'une des revendications précédentes, caractérisé en ce que l'élément de transport (20) s'étend axialement plus près de l'extrémité de nettoyage (18) de la tige d'outil (14) que la brosse (28).
  11. Outil selon l'une des revendications précédentes, caractérisé en ce que l'élément de transport (20) comporte une lèvre (44) sur son bord situé radialement vers l'extérieur.
  12. Outil selon la revendication 11, caractérisé en ce que l'élément de transport (20) et la lèvre (44) sont fabriqués en une pièce.
  13. Procédé pour nettoyer un trou foré (12) à l'aide d'un outil (10) selon l'une des revendications précédentes, dans lequel l'élément de transport (20) de l'outil (10) a un diamètre extérieur (d20) et le procédé comporte les étapes suivantes consistant à :
    a) réaliser un trou foré (12) avec un diamètre de trou foré prédéfini (d12) qui est plus petit que le diamètre extérieur (d20) de l'élément de transport (20),
    b) introduire l'outil (10) dans le trou foré (12), l'élément de transport (20) étant déformé élastiquement de telle sorte que son diamètre extérieur (d20) correspond sensiblement au diamètre de trou foré (d12), l'outil (10) étant tourné pendant l'introduction, de préférence également lors de l'extraction, autour de son axe de tige (A).
EP11190089.0A 2010-12-22 2011-11-22 Outil et procédé destinés au nettoyage d'un trou de forage Not-in-force EP2468427B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11190089T PL2468427T3 (pl) 2010-12-22 2011-11-22 Narzędzie i sposób oczyszczania otworu wiertniczego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010063859A DE102010063859A1 (de) 2010-12-22 2010-12-22 Werkzeug und Verfahren zum Reinigen eines Bohrlochs

Publications (3)

Publication Number Publication Date
EP2468427A2 EP2468427A2 (fr) 2012-06-27
EP2468427A3 EP2468427A3 (fr) 2013-03-20
EP2468427B1 true EP2468427B1 (fr) 2015-04-15

Family

ID=45002776

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11190089.0A Not-in-force EP2468427B1 (fr) 2010-12-22 2011-11-22 Outil et procédé destinés au nettoyage d'un trou de forage

Country Status (6)

Country Link
US (1) US9802226B2 (fr)
EP (1) EP2468427B1 (fr)
JP (1) JP2012139676A (fr)
DE (1) DE102010063859A1 (fr)
PL (1) PL2468427T3 (fr)
TW (1) TW201233470A (fr)

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CN104922743B (zh) * 2015-07-13 2017-03-01 浙江中医药大学 一种全自动制作药罐的装置
CN104922744B (zh) * 2015-07-13 2017-03-01 浙江中医药大学 制作药罐的装置
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CN105032861A (zh) * 2015-07-31 2015-11-11 苏州速腾电子科技有限公司 一种气动清洗器
EP3323551A1 (fr) 2016-11-18 2018-05-23 Inventio AG Dispositif de nettoyage de trous
CN106984971B (zh) * 2017-04-01 2019-02-12 浙江工业职业技术学院 汽车零部件用加工系统
CN108952629A (zh) * 2018-07-05 2018-12-07 鞍钢集团矿业有限公司 可调钻孔洗孔器
US10908314B1 (en) 2020-02-11 2021-02-02 Halliburton Energy Services, Inc. Method and apparatus for mapping a crush zone of a perforated core sample
CN115213147B (zh) * 2022-08-03 2024-05-17 中建八局第一建设有限公司 一种建筑预留孔清理装置
CN115318692B (zh) * 2022-08-15 2024-02-20 中建八局第一建设有限公司 一种狭长空间多曲面玻璃自清洁装置及其施工方法

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DE102008001908A1 (de) 2008-05-21 2009-11-26 Hilti Aktiengesellschaft Vorrichtung zur Bohrlochreinigung
US11066880B2 (en) 2008-06-25 2021-07-20 Illinois Tool Works Inc. Apparatus for cleaning boreholes within substrates
DE102010063859A1 (de) * 2010-12-22 2012-06-28 Hilti Aktiengesellschaft Werkzeug und Verfahren zum Reinigen eines Bohrlochs

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TW201233470A (en) 2012-08-16
PL2468427T3 (pl) 2015-09-30
EP2468427A3 (fr) 2013-03-20
US20130019896A1 (en) 2013-01-24
US9802226B2 (en) 2017-10-31
DE102010063859A1 (de) 2012-06-28
EP2468427A2 (fr) 2012-06-27
JP2012139676A (ja) 2012-07-26

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