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US20010013430A1 - Solid hard metal head for a drill - Google Patents

Solid hard metal head for a drill Download PDF

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Publication number
US20010013430A1
US20010013430A1 US09/778,437 US77843701A US2001013430A1 US 20010013430 A1 US20010013430 A1 US 20010013430A1 US 77843701 A US77843701 A US 77843701A US 2001013430 A1 US2001013430 A1 US 2001013430A1
Authority
US
United States
Prior art keywords
cutting edges
hard metal
solid hard
metal head
auxiliary 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.)
Abandoned
Application number
US09/778,437
Other languages
English (en)
Inventor
Udo Hauptmann
Tim Prols
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7631111&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US20010013430(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Hilti AG filed Critical Hilti AG
Assigned to HILTI AKTIENGESELLSCHAFT reassignment HILTI AKTIENGESELLSCHAFT ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: PROLS, TIM, HAUPTMANN, UDO
Publication of US20010013430A1 publication Critical patent/US20010013430A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/02—Twist drills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2222/00—Materials of tools or workpieces composed of metals, alloys or metal matrices
    • B23B2222/28—Details of hard metal, i.e. cemented carbide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/75—Stone, rock or concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/20—Number of cutting edges
    • B23B2251/204—Four cutting edges

Definitions

  • the present invention relates to a solid hard metal head for a rock drill used for drilling stones and concrete and securable in mechanized hand-held tools for removal abrasive materials upon application of a rotary percussion movement thereto.
  • Drills for drilling in stone or concrete require, because they are used for removal of abrasive materials, that the parts insertable into the drill head be made of hard metal as they should have a high hardness so that they would not be subjected to an extensive wear.
  • the insertable parts are fixedly secured in the drill.
  • the insertable parts are formed as hard metal plates soldered in the head.
  • Such a drill is disclosed in German document DE 20 08 825. A relatively small flexural strength of the heard metal plates leads to their breaking out of the remainder of the drill, in particular, when the drill head encounters a reinforcing metal.
  • German Publication DE 43 39 245 discloses forming an entire drill head of a hard metal as a solid hard metal head.
  • a solid hard metal head has a compact, substantially convex, polygonal shape with the lengths of its sides being substantially the same. Due to this shape, the solid hard metal head has a high inner stiffness.
  • auxiliary cutting edges are provided between the main cutting edges and which are arranged exclusively on the radial edge of the head and are axially offset.
  • the auxiliary cutting edges due to their penetration resistance and mass inertia, prevent the main cutting edges from penetrating deeply into the reinforcing metal by temporary lifting the drill from the reinforcing metal.
  • the manufacturing and economical drawbacks of this drill result from a large volume of the solid hard metal head when the drill is designed for drilling large-diameter bores.
  • the auxiliary cutting edge would have a slightly concave, in the axial direction, shape with an obtuse angle being formed in a plane, which passes through the radially outer cutting edges transvers to the drill rotational axis, with the obtuse angle being symmetrical with respect to the rotational axis.
  • the concave, in the axial direction, shape of the auxiliary cutting edge in cooperation with the non-concave main cutting edge, forms an axially extending free space for removal of drillings from the tool tip and which prevents compression of the drillings in front of the drill tip which otherwise would have reduced the drill performance.
  • the drawback of forming the auxiliary cutting edges with a slightly concave shape consists in that the auxiliary cutting edges, in combination with a non-concave main cutting edges, make precise drilling more difficult.
  • German Publication DE 19 70 711.5 discloses a drill having a one-piece, prismatic, solid hard metal head with more than two rotationally symmetrical, radial cutting edges and which is inserted in corresponding grooves formed in the drill body and having axially extending surfaces, with the head being fixedly secured with the drill body along the axially extending surfaces of the groove and to the end surface of the drill body.
  • the attachment of the head to the end surface of the drill body, on one hand, and the additional securing of the head, in the radially outer region of the head, in the axial grooves with formation mortise and tenon joints, on the other hand, provides for a breakproof securing of the cutting edges, even in large diameter drills, so that they would not be dislodged even upon engagement with the reinforcing metal.
  • a smaller force is applied to each edge, which adversely affects drill performance.
  • Another drawback of the above-described rill consists in a need to form a plurality of mortises corresponding to the number of the cutting edges, this makes solving the problem of removing of the drilled abrasive material more difficult.
  • European publication EP 88 44 48 discloses a solid hard metal head with an “X”-shaped arrangement of four cutting edges, with the main cutting edges and the auxiliary cutting edges, which are formed as side cutting edges, being arranged, respectively, diametrically opposite each other and with respective main and auxiliary cutting edges forming an angle that deviates from 90°.
  • the main cutting edges form, in their plane, an obtuse angle, with the tip being in the region of the rotational axis.
  • the auxiliary cutting edges extend perpendicular to the rotational axis and are axially offset backward in such a way that the inner region of a bore is cut with main cutting edges, and the outer region of the bore is cut with the auxiliary, side, cutting edges.
  • the so formed side cutting edges have a tendency to break upon striking a reinforcing metal, as a result of a high load applied to the side edges.
  • the “X”-shaped, solid, hard metal head has essentially a rotationally symmetrical, crosswise, axially mirror symmetrical, prismatic shape.
  • the base surface is provided with deep, concave, obtuse-angled notches which extend radially inward along one-third of the base surface parallel to the cutting edges over the longer surfaces.
  • the notches serve for removal of the cut abrasive material.
  • the side cutting edges trail the main cutting edges in the rotational direction, forming with the respective main cutting edges acute angles. As a result, a large recess is provided in front of a main cutting edge.
  • a small concave recess on each of the short sides of the base surface is limited by the radial edge region and serves for removal of some of the cut abrasive material in front of the respective auxiliary or side cutting edge.
  • the drawback of this head consists in that because of an obtuse angle, in the rotational direction, between the auxiliary cutting edge and the trailing main cutting edge, a large rotational angle is needed in order to overcome the mass inertia.
  • an object of the present invention is to provide a solid hard metal head for a rock drill which would insure, even with a large head diameter, application of high localized forces to the cutting edges for achieving a high drilling capacity.
  • Another abject of the present invention is to provide a solid hard metal head for a rock drill which would insure adequate removal of the cut abrasive material and a precise spot drilling.
  • a further object of the present invention is to provide a solid hard metal head for a rock drill which would insure application of a reduced load to the cutting edges upon encounter of the drilling head with reinforcing metal.
  • a still further object of the present invention is to provide a solid hard metal head for a rock drill with break-proof cutting edges.
  • a solid hard metal head for a drill including two main cutting edges arranged substantially diametrically opposite each other, and two auxiliary cutting edges likewise arranged substantially diametrically opposite each other, with associated main cutting edge and auxiliary cutting edge forming an acute angle therebetween, and with the auxiliary cutting edges being arranged, with respect to the rotational direction of the drill, in front of the respective, associated therewith, main cutting edges.
  • the inventive solid hard metal head has a drilling diameter from 12 mm to 40 mm.
  • the arrangement of the auxiliary cutting edges in front of the main cutting edges provides for lifting of the drill when the drill strikes reinforcing metal, which prevents application of a load to the main cutting edges when the drill strikes reinforcing metal.
  • the acute angle between the associated main and auxiliary cutting edges which lies in a plane extending transverse to a drill rotational axis, lies in a range between 40° and 90°.
  • a satisfactory removal of the cut abrasive material in front of main cutting edge into a helical groove adjoining the solid hard metal head of the drill is insured by providing between adjacent cutting edges two radial concave recesses, respectively, extending parallel to the respective edges and formed in the circumference of the cross-sectional surface and having a prismatic shape in the axial direction.
  • a portion of a side surface of the recess, which extends along the rotational axis, advantageously, in front of the auxiliary cutting edge, provides for additional securing of the solid hard metal head in groove-shaped tenons provided in the tool body.
  • These portions of the side surfaces advantageously are provided with chamfers extending toward the end surface for breaking the edge.
  • the foregoing structure insures a break-proof attachment of the solid hard metal head to the drill body and provides for pressure-side support of the main cutting edges.
  • the main cutting edges are so formed that they end, at the tip of the head, at a chisel edge and have a slightly concave shape, whereby a somewhat acute angle is formed with respect to the tip region, which provides for precise spot drilling with the chisel edge, and a somewhat obtuse angle is formed between the main cutting edges and the rotational axis with respect to the radial outer region, which provides for a precisely axial lead-in of the axial blows imparted to the drill, which insures transmittal of the energy of axial blows to the cut material with minimum losses.
  • the auxiliary cutting edges have a pronounced axially concave shape, therefore, a plane, which passes through the radial outer regions of the auxiliary cutting edges perpendicular to the rotational axis, is interrupted.
  • axial recesses which insure removal of the cut material from the drill (head) tip.
  • a transitional surface in a sector between adjacent main and auxiliary cutting edges has advantageously a circumferentially concave shape in an axial direction, which permits to obtain a larger recess for transporting drillings and to obtain a high inner stiffness of the solid hard metal head.
  • Forming the main and the auxiliary cutting edges as integral arts of the solid hard metal head insures their precise positioning relative to each other, which is not affected by manufacturing tolerances associated with attachment of the head with the drill body.
  • the axial spacing of the auxiliary cutting edges is so selected that the highest point of the axial generating curve does not project exactly over the axial generating curve of the main cutting edges.
  • a low-vibration operation and a uniform round bore geometry is achieved by matching the generating envelopes of the main and auxiliary cutting edges to each other, in particular, by an appropriate radial displacement of the generating curve of the auxiliary cutting edges relative to the main cutting edges.
  • FIG. 1 a perspective view of the solid hard metal head of a drill according to the present invention
  • FIG. 2 a plan view of the solid hard metal head shown in FIG. 1;
  • FIG. 3 a side view of the solid hard metal head shown in FIG. 1;
  • FIG. 4 an angular side view of the solid hard metal head shown in FIG. 1
  • a solid hard metal head 1 of a drill according to the present invention which is shown in FIG. 1, has advantageously a drilling diameter from 12 mm to 40 mm and an X-shaped arrangement of four cutting edges 2 , 3 , with the main cutting edges 2 extending diametrically opposite each other with respect to the rotational axis A, and with respective main cutting edge 2 and auxiliary cutting edge 3 forming an angle that deviates from 90°, namely, an acute angle.
  • the auxiliary cutting edge 3 is arranged, in the drill rotational direction ⁇ , in front of the associated therewith, main cutting edge 2 .
  • an angle ⁇ between the main cutting edge 2 and the auxiliary cutting edge 3 which lies in plane extending perpendicular to the rotational axis A, amounts to or is located within a range from 40° to 90°.
  • the auxiliary cutting edge 3 is radially displaced.
  • two concave recesses 4 , 5 formed in the circumference of the cross-sectional surface and having, in the axial direction, a substantially prismatic shape.
  • a portion of a side surface 6 of the recess 5 which extends along the rotational axis A, advantageously, in front of the auxiliary cutting edge 3 , provides for additional securing of the solid hard metal head 1 in mortises provided in the tool body.
  • the securing portion of the side surface 6 has a chamfer 7 extending toward an end surface 8 for breaking the edge.
  • the main cutting edge 2 which, at the tip, ends at chisel edge 9 , has a slightly concave shape in the axial direction.
  • the axial spacing of the auxiliary cutting edge 3 does not project exactly over the axial generating curve of the main cutting edge 2 .
  • the auxiliary cutting edge 3 has a noticeable concave shape in the axial direction, so that a plane 10 , which extends through the radially outer regions of the auxiliary cutting edges 3 transverse to the rotational axis, is interrupted or cut.
  • the pronounced concave shape of the auxiliary cutting edge 3 in cooperation with the slightly concave shape of the main cutting edge, forms a recess 11 for removal of drillings from the drill tip.
  • the transition surface 12 in the sector between the adjacent cutting edges 2 , 3 , also has, in the axial direction, a circumferentially concave shape.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
US09/778,437 2000-02-16 2001-02-07 Solid hard metal head for a drill Abandoned US20010013430A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10006932A DE10006932A1 (de) 2000-02-16 2000-02-16 Bohrwerkzeug für Gestein
DE10006932.0 2000-02-16

Publications (1)

Publication Number Publication Date
US20010013430A1 true US20010013430A1 (en) 2001-08-16

Family

ID=7631111

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/778,437 Abandoned US20010013430A1 (en) 2000-02-16 2001-02-07 Solid hard metal head for a drill

Country Status (5)

Country Link
US (1) US20010013430A1 (de)
EP (1) EP1125663B1 (de)
JP (1) JP2001252807A (de)
DE (2) DE10006932A1 (de)
ZA (1) ZA200101301B (de)

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030118414A1 (en) * 2000-03-02 2003-06-26 Mathias Fuss Rock drill
WO2003103914A1 (ja) * 2002-06-06 2003-12-18 株式会社ミヤナガ ドリルビット
US6843334B2 (en) * 2001-01-17 2005-01-18 Hilti Aktiengesellschaft Drilling head of a rock drill
US6860344B2 (en) * 2001-06-25 2005-03-01 Kennametal Inc. Monolithic roof cutting bit insert
US20050274551A1 (en) * 2004-06-09 2005-12-15 Rainer Batliner Drill
US20070251733A1 (en) * 2006-04-27 2007-11-01 Klaus Hoeggerl Hard material bit
US20070280798A1 (en) * 2006-03-02 2007-12-06 Zeiler Jeffrey M Cutting tool
US20080110679A1 (en) * 2006-11-15 2008-05-15 Hilti Aktiengesellschaft Drill with a hard material drilling head
US20080118317A1 (en) * 2006-11-17 2008-05-22 Thorsten Assel Drill with a hard material drilling head
US20080121437A1 (en) * 2006-05-10 2008-05-29 Olaf Koch Hard material drilling head
USD575808S1 (en) 2007-03-02 2008-08-26 Milwaukee Electric Tool Corporation Cutting tool
US20090103990A1 (en) * 2007-10-19 2009-04-23 Hilti Aktiengesellschaft Percussion-rotary drill
USD605672S1 (en) * 2007-03-01 2009-12-08 Milwaukee Electric Tool Corporation Cutting blade
US20100135741A1 (en) * 2008-12-03 2010-06-03 Black & Decker Inc. Drill Bit Including One Piece Cutting Head
US20110168453A1 (en) * 2008-09-23 2011-07-14 Illinois Tool Works Inc. Rock drill bit
US8328477B2 (en) 2006-03-02 2012-12-11 Milwaukee Electric Tool Corporation Cutting tool
US9284787B2 (en) 2012-05-29 2016-03-15 Black & Decker Inc. Drill bit and cutting head for drill bit
US9500038B2 (en) 2013-02-01 2016-11-22 Milwaukee Electric Tool Corporation Auger bit with replaceable cutting bit
US20170165797A1 (en) * 2014-07-01 2017-06-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Cutting tool production method and cutting tool
US20220297204A1 (en) * 2021-03-18 2022-09-22 Black & Decker Inc. One-piece cutting head for a drill bit

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2283224C2 (ru) * 2002-06-06 2006-09-10 Кабусики Кайся Миянага Сверло
DE102004022747A1 (de) * 2004-05-07 2005-11-24 Fischerwerke Artur Fischer Gmbh & Co. Kg Spanwerkzeug mit geometrisch bestimmten Schneiden für Drehantrieb
DE102004047469A1 (de) * 2004-09-30 2006-04-06 Robert Bosch Gmbh Bohrwerkzeug mit einem als Platte oder Kopf ausgebildeten Schneidelement
DE102006020538A1 (de) 2006-05-03 2007-11-15 Irwin Industrial Tools Gmbh Bohrkopf für Bohrwerkzeug und Bohrwerkzeug
DE202007002120U1 (de) * 2007-02-08 2008-06-19 Illinois Tool Works Inc., Glenview Gesteinsbohrer
DE202007010827U1 (de) * 2007-08-03 2008-12-18 Drebo Werkzeugfabrik Gmbh Bohrer mit einem Hartmetalleinsatz an dem Bohrerkopf
DE102008062298B4 (de) 2008-12-15 2025-05-15 Drebo Werkzeugfabrik Gmbh Bohrkörper
FR2943565B1 (fr) * 2009-03-27 2012-12-28 Diager Plaquette de coupe pour outil rotatif de percage
FR3004747B1 (fr) * 2013-04-19 2017-11-03 Diager Plaquette de coupe
DE102023206483A1 (de) * 2023-07-07 2025-01-09 Robert Bosch Gesellschaft mit beschränkter Haftung Bohrwerkzeug mit einem Bohrkopf
DE102023206478A1 (de) * 2023-07-07 2025-01-09 Robert Bosch Gesellschaft mit beschränkter Haftung Bohrwerkzeug mit einem Bohrkopf, der eine zentrale Pyramide aufweist

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19545648A1 (de) * 1995-12-07 1997-06-12 Hilti Ag Drehschlag-Wendelbohrer
DE19709771B4 (de) * 1997-03-10 2008-03-20 Drebo Werkzeugfabrik Gmbh Gesteinsbohrer
DE19724373A1 (de) * 1997-06-10 1998-12-17 Hilti Ag Gesteinsbohrer
DE29819388U1 (de) * 1998-10-30 1999-09-02 KEIL Werkzeugfabrik Karl Eischeid GmbH, 51766 Engelskirchen Hartmetallschneidplatte für den Einsatz an einem Bohrer

Cited By (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030118414A1 (en) * 2000-03-02 2003-06-26 Mathias Fuss Rock drill
US6910838B2 (en) * 2000-03-02 2005-06-28 Hawera Probst, Gmbh Rock drill
US6843334B2 (en) * 2001-01-17 2005-01-18 Hilti Aktiengesellschaft Drilling head of a rock drill
US6860344B2 (en) * 2001-06-25 2005-03-01 Kennametal Inc. Monolithic roof cutting bit insert
WO2003103914A1 (ja) * 2002-06-06 2003-12-18 株式会社ミヤナガ ドリルビット
US20050274551A1 (en) * 2004-06-09 2005-12-15 Rainer Batliner Drill
US7497282B2 (en) 2004-06-09 2009-03-03 Hilti Aktiengesellschaft Drill bit having radially extending cutting bits on radial legs
US10618119B2 (en) 2006-03-02 2020-04-14 Milwaukee Electric Tool Corporation Cutting tool
US7625160B2 (en) 2006-03-02 2009-12-01 Milwaukee Electric Tool Corporation Cutting tool
US20070280798A1 (en) * 2006-03-02 2007-12-06 Zeiler Jeffrey M Cutting tool
US8328477B2 (en) 2006-03-02 2012-12-11 Milwaukee Electric Tool Corporation Cutting tool
US7661911B2 (en) 2006-03-02 2010-02-16 Milwaukee Electric Tool Corporation Cutting tool
US8371777B2 (en) 2006-03-02 2013-02-12 Milwaukee Electric Tool Corporation Cutting tool
US20070277656A1 (en) * 2006-03-02 2007-12-06 Zeiler Jeffrey M Cutting tool
US9339874B2 (en) 2006-03-02 2016-05-17 Milwaukee Electric Tool Corporation Cutting tool
US7549491B2 (en) * 2006-04-27 2009-06-23 Hilti Aktiengesellschaft Hard material bit
US20070251733A1 (en) * 2006-04-27 2007-11-01 Klaus Hoeggerl Hard material bit
EP1849544A3 (de) * 2006-04-27 2016-10-05 HILTI Aktiengesellschaft Hartstoffeinsatz
AU2007201790B2 (en) * 2006-04-27 2010-05-13 Hilti Aktiengesellschaft Hard material bit
US7559383B2 (en) * 2006-05-10 2009-07-14 Hilti Aktiengesellschaft Hard material drilling head
US20080121437A1 (en) * 2006-05-10 2008-05-29 Olaf Koch Hard material drilling head
AU2007202047B2 (en) * 2006-05-10 2010-04-29 Hilti Aktiengesellschaft Hard material drilling head
US20080110679A1 (en) * 2006-11-15 2008-05-15 Hilti Aktiengesellschaft Drill with a hard material drilling head
AU2007234490B2 (en) * 2006-11-15 2010-05-27 Hilti Ag Drill with a hard material drilling head
US20080118317A1 (en) * 2006-11-17 2008-05-22 Thorsten Assel Drill with a hard material drilling head
USD605672S1 (en) * 2007-03-01 2009-12-08 Milwaukee Electric Tool Corporation Cutting blade
USD575808S1 (en) 2007-03-02 2008-08-26 Milwaukee Electric Tool Corporation Cutting tool
US20090103990A1 (en) * 2007-10-19 2009-04-23 Hilti Aktiengesellschaft Percussion-rotary drill
US20110168453A1 (en) * 2008-09-23 2011-07-14 Illinois Tool Works Inc. Rock drill bit
US8960336B2 (en) 2008-09-23 2015-02-24 Heller Tools Gmbh Rock drill bit
US7861807B2 (en) 2008-12-03 2011-01-04 Black & Decker Inc. Drill bit including one piece cutting head
US20100135741A1 (en) * 2008-12-03 2010-06-03 Black & Decker Inc. Drill Bit Including One Piece Cutting Head
US9284787B2 (en) 2012-05-29 2016-03-15 Black & Decker Inc. Drill bit and cutting head for drill bit
US9500038B2 (en) 2013-02-01 2016-11-22 Milwaukee Electric Tool Corporation Auger bit with replaceable cutting bit
US20170165797A1 (en) * 2014-07-01 2017-06-15 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Cutting tool production method and cutting tool
US20220297204A1 (en) * 2021-03-18 2022-09-22 Black & Decker Inc. One-piece cutting head for a drill bit
US12070807B2 (en) * 2021-03-18 2024-08-27 Black & Decker Inc. One-piece cutting head for a drill bit

Also Published As

Publication number Publication date
JP2001252807A (ja) 2001-09-18
EP1125663B1 (de) 2009-06-10
EP1125663A2 (de) 2001-08-22
ZA200101301B (en) 2001-08-21
EP1125663A3 (de) 2002-06-05
DE10006932A1 (de) 2001-08-23
DE50114927D1 (de) 2009-07-23

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Legal Events

Date Code Title Description
AS Assignment

Owner name: HILTI AKTIENGESELLSCHAFT, LIECHTENSTEIN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HAUPTMANN, UDO;PROLS, TIM;REEL/FRAME:011552/0646;SIGNING DATES FROM 20001221 TO 20010103

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION