EP0778390A2 - Perceuse rotative hélicoidale à percussion - Google Patents

Perceuse rotative hélicoidale à percussion Download PDF

Info

Publication number
EP0778390A2
EP0778390A2 EP96810629A EP96810629A EP0778390A2 EP 0778390 A2 EP0778390 A2 EP 0778390A2 EP 96810629 A EP96810629 A EP 96810629A EP 96810629 A EP96810629 A EP 96810629A EP 0778390 A2 EP0778390 A2 EP 0778390A2
Authority
EP
European Patent Office
Prior art keywords
shaft
pin
guide elements
shaped guide
embedded
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
EP96810629A
Other languages
German (de)
English (en)
Other versions
EP0778390A3 (fr
EP0778390B1 (fr
Inventor
Werner Kleine
Werner Bongers
Axel Neukirchen
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
Publication of EP0778390A2 publication Critical patent/EP0778390A2/fr
Publication of EP0778390A3 publication Critical patent/EP0778390A3/fr
Application granted granted Critical
Publication of EP0778390B1 publication Critical patent/EP0778390B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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 rotary impact twist drill according to the generic preamble of claim 1.
  • Rotary impact twist drills are drilling tools that are used in connection with axial impact supported rotary drilling rigs.
  • these are generally rock or masonry drills that can be used for the rotary striking drilling or breakthroughs in concrete or masonry.
  • a rotary impact twist drill is known, which has a shank with at least one Abfuhmut in its jacket, which extends spirally from the shaft end in the direction of the insertion end of the tool.
  • Hard metal cutting edges are provided at the shaft end, which are located in front of the end face of the shaft end. The cutting edges are arranged on hard metal pins which protrude from the end face of the shaft end.
  • the known rotary impact twist drill has at least one central hard metal pin and two peripheral hard metal pins opposite one another on a diameter of the shaft end.
  • the peripheral hard metal pins are set back from the central pin and inserted into the end face of the shaft end such that they protrude radially over their entire length over the outer surface of the shaft. They have a polygonal cross-sectional profile and are inserted at an angle to the axis of the shaft in such a way that essentially only the cutting edges at their foremost free end come into engagement with the borehole wall.
  • this central carbide pin acts like a centering element, this known rotary impact twist drill has inadequate lateral guidance in the borehole during operation. This can result in the location hole being made too large or the drilling tool even tilting in the location hole. Due to the inclined arrangement of the peripheral hard metal pins relative to the axis of the shaft, they do not act on all sides edged carbide pins relatively high radial forces, which can lead to loosening and falling out of the peripheral carbide pins.
  • EP-A-0 226 537 which forms the generic term of the generic type, proposes a twist impact twist drill which has a hard metal cutting plate which extends over the entire diameter of the drill shank and is inserted into a continuous groove in the end face of the shank.
  • cutting pins are provided which protrude from the end face of the shaft or from the jacket of the shaft at the shaft end.
  • the free ends of the cutting pins lie in the rotation surface spanned by the cutting edges of the hard metal plate.
  • the free ends of the cutting pins projecting beyond the sheath of the shaft are in contact with the borehole wall during drilling and roughen it during the drilling process. While in this known rotary impact twist drill there is already a certain guidance of the drilling tool in the bore, due to the abrasive effect of the cutting pins lying against the borehole wall there is a certain stiffness which reduces the achievable mining performance in the underground.
  • the object of the present invention is therefore to improve a rotary impact twist drill in such a way that optimal guidance of the drilling tool in the receiving bore is ensured.
  • the aim is to create a twist impact twist drill that is easy to operate, has no tendency to tilt and allows a high level of removal.
  • the rotary impact twist drill according to the invention should also be simple and inexpensive to manufacture.
  • a rotary impact twist drill which has the features stated in the characterizing section of patent claim 1.
  • at least one pin-shaped guide element is embedded in the shaft in the region of the shaft end, its longitudinal axis running essentially perpendicular to the longitudinal axis of the shaft.
  • the free end face of the pin-shaped guide element has an overhang relative to the sheath of the shank that is smaller than the radial overhang of the cutting insert with the hard metal cutting edges.
  • the projection of which relative to the sheath of the shank is smaller than the radial projection of the cutting plate By providing at least one pin-shaped guide element on the drilling tool, the projection of which relative to the sheath of the shank is smaller than the radial projection of the cutting plate, excellent guidance of the drilling tool in the borehole is achieved without the disadvantage of a certain stiffness as a result of having to put up with an abrasive effect. This creates the prerequisites for high drilling performance.
  • the pin-shaped guide element does not take part in the dismantling process, it only has management functions. As a result, the guide element can be made very robust, regardless of the cutting edge geometry. The fact that the pin-shaped guide element is embedded in the shaft over its entire circumference results in an optimal hold in the shaft.
  • two or more pin-shaped guide elements are provided, which are each arranged in pairs in diagonally opposite quadrants of a cross section perpendicular to the axis of the shaft.
  • the pairing is done for reasons of symmetry. In this way, there is sufficient scope for the arrangement of the extraction grooves for the drilling dust.
  • a procedure can be provided in the space between the pin-shaped guide elements and the cutting plate.
  • the pin-shaped guide elements are advantageously arranged diagonally opposite one another, their longitudinal axes lying on one diameter.
  • the angle at which the pin-shaped guide elements are offset from the radially projecting cutting plate on the circumference of the casing can vary as required. It is advantageous to choose an acute angle such that a wide main path is in front of a main cutting edge in the direction of rotation of the drilling tool.
  • the pin-shaped guide elements are preferably embedded in the casing at a distance from the end face of the shaft, which is approximately 1/4 to approximately 3/4 of the embedded length of the hard metal cutting edges.
  • the distance relates to the position of the longitudinal axes of the guide elements. In this way, the drilling tool is guided precisely in the area which is subjected to the greatest stresses due to the cutting attack of the hard metal cutting edges on the borehole wall.
  • the guide pins can be embedded in the shaft at the same distance from the end face of the shaft or at different distances.
  • the pin-shaped guide elements have an overhang relative to the casing which corresponds to at least half the radial overhang of the hard metal cutting edges.
  • the pin-shaped guide elements counteract this.
  • the extent of the projection of the pin-shaped guide elements thus defines the maximum distance that the free front end of the shaft can avoid. In this way, the greatest possible concentricity is ensured without the pin-shaped guide elements being permanently in engagement with the borehole wall.
  • the free end face of the pin-shaped guide elements which protrudes from the sheath of the shaft, is at least partially curved, the abrasive effect of the guide elements on contact with the borehole wall is significantly reduced.
  • the free end face preferably has the curvature of a spherical surface or a cylindrical surface at least in regions, the curvature being matched to that of the jacket of the shaft.
  • the pin-shaped guide elements have a circular cross section.
  • the mounting holes in the shaft can be easily created with a circular cross-section.
  • the pin-shaped guide elements In order to ensure in a simple manner that the pin-shaped guide elements have a defined projection over the sheath of the shaft, it is advantageous to provide a depth stop on the guide elements as an assembly aid. This can be achieved, for example, by one or more guide pins arranged on the jacket of the guide elements.
  • the pin-shaped guide elements can have a mushroom-shaped head that bears against the casing of the shaft during assembly and projects beyond it in the desired extent.
  • the guide elements are embedded in a continuous groove in the shaft end, which extends over a diameter of the shaft. This further facilitates the manufacture of the tool. There is no need to drill holes with a more or less precisely defined depth.
  • a further groove is milled into the shaft end, which is inclined at the desired angle to the receiving groove for the cutting insert.
  • This groove can be a continuous groove, but grooves that are not on a common diameter can also be milled.
  • the guide elements can be fixed in the groove, for example, by soldering.
  • the exemplary embodiment of the rotary impact twist drill according to the invention shown in FIGS. 1 and 2 comprises a shaft 1 which is equipped with two main extraction grooves 4, 5 for cuttings which run in a spiral in its casing 2.
  • a cutting plate 6 is arranged, which is equipped with hard metal blades 7.
  • the preferably roof-shaped hard metal cutting edges 7 extend axially recessed from a cutting tip 8 outwards to the casing 2 of the shank 1.
  • the cutting insert 6 is fixed in a groove 9 in the end 3 of the shank 1, which extends over its diameter.
  • the cutting plate 6 is fastened in the groove 9 by soldering.
  • two pin-shaped guide elements 11 are embedded in the shaft, which with their free end face 12 protrude beyond the jacket 2 of the shaft 1.
  • the radial protrusion r of the guide elements 11 is smaller than the radial protrusion s of the cutting plate 6 and corresponds to at least half the radial protrusion s of the cutting plate 6. In this way it is ensured that the guide elements 11 do not take part in the dismantling process, but merely a guiding function for the rotary impact -Complete twist drill.
  • the guide elements 11 are embedded in the shaft 1 such that their longitudinal axes L run essentially perpendicular to the longitudinal axis A of the shaft 1.
  • the rotary impact twist drill can have two guide elements 11. However, only a single guide element 11 can also be provided, as is indicated in the side view of the rotary impact twist drill in FIG. 1. At the arrangement of more than one guide element 11 in the shaft end 10, as shown in FIG. 2, these are preferably provided in pairs in diagonally opposite quadrants of a cross section perpendicular to the longitudinal axis A of the shaft 1. According to the illustration, the longitudinal axes L of the guide elements 11 are arranged on a diameter of the shaft 1. However, this arrangement is not absolutely necessary.
  • the guide elements 11 can also be embedded in the shaft end 10 in such a way that their longitudinal axes lie in the cross-sectional plane of the shaft 1 on straight lines which differ from a diameter and which can run parallel or inclined to a diameter.
  • the longitudinal axes L of the guide elements 11 advantageously form an acute angle with the cutting plate 6. In this way, the main discharge grooves 4, 5 leading the hard metal cutting edges 7 in the direction of rotation can be made wider.
  • the guide elements 11 are embedded in the shaft 1 in such a way that their longitudinal axis is at a distance from the end 3 of the shaft which is approximately 1/4 to approximately 3/4 of the embedded length of the cutting plate 6. As can be seen from FIG. 2, the guide elements 11 are embedded in the shaft 1 over approximately 3/5 to approximately 3/4 of their longitudinal extent l.
  • guide elements 11 have a circular cross section. However, this is not absolutely necessary; the guide elements 11 can also have a polygonal cross section, for example hexagonal or octagonal.
  • the guide element 11 shown in FIG. 3 has two identically designed end faces 12 in order to enable the guide element to also be embedded in the shaft 1 when rotated through 180 °.
  • the end face 12 of the guide element 11 shown in FIGS. 1 and 3 is matched in its curvature to the curvature of the jacket 2 of the shaft 1.
  • the end face 12 initially has an annular section 14 of a spherical surface, which adjoins the cylindrical part 13 of the guide element 11.
  • the radius of curvature of the spherical surface essentially corresponds to the radius of curvature of the casing 2 at the shaft end 10.
  • the central region 15 of the end surface 12 enclosed by the annular surface 14 has, for example, the curvature of a cylindrical surface; but he could also be trained.
  • the guide element 21 shown in FIG. 4 is equipped with a depth stop as an assembly aid.
  • the depth stop is formed by an annular shoulder 24, which adjoins the cylindrical section 23 of the guide element.
  • the free end face 12 of the guide element 21 is provided on a mushroom-shaped head 22 which projects beyond the cylindrical region 23 of the guide element 21.
  • the radius of curvature of the free end face 12 is matched to the radius of curvature of the jacket 2 at the shaft end 10.
  • the end face 12 can be composed of different surface sections, as explained using the exemplary embodiment in FIG. 3.
  • the free end face 12 of the guide element 21 can also be formed by a spherical surface section with a suitable radius of curvature.
  • the guide elements 11 are inserted in bores vertically to the shaft axis A and are embedded in the shaft 1 over their entire circumference.
  • an alternative embodiment of the rotary impact twist drill according to the invention is shown, in which the guide elements 31 are embedded in a groove 16 in the end 3 of the shaft.
  • the guide elements 31 are fixed in the groove 16 which is open at the end 3, for example by soldering.
  • the additional groove 16 can, as shown, be designed as a continuous groove which extends over a diameter D of the shank 1 and is preferably inclined at an acute angle with respect to the receiving groove 9 for the cutting plate 6.
  • each guide element which lie on a straight line that does not coincide with a diameter D, which runs parallel or inclined to a diameter D and opens only at one point of the jacket 2.
  • the depth of the additional groove (s) 16 is dimensioned such that the longitudinal axes L of the guide elements 31 are at a distance from the end face 3 of the shank 1 which is approximately 1/4 to approximately 3/4 of the embedded length of the cutting plate 6.
  • the protrusion of which compared to the sheath of the shank is smaller than the radial protrusion of the cutting plate excellent guidance of the drilling tool in the borehole is achieved without the disadvantage of a certain stiffness due to an abrasive effect in To have to buy. This creates the prerequisites for high drilling performance.
  • the pin-shaped guide element does not take part in the dismantling process, it has only Management functions and can therefore be made very robust, regardless of the cutting edge geometry.
  • the fact that the pin-shaped guide element is embedded in the shaft over a substantial part of its longitudinal extent results in an optimal hold in the shaft.
  • the essentially perpendicular alignment of its longitudinal axis to the axis of the shaft facilitates the manufacture of the rotary impact twist drill according to the invention.

Landscapes

  • 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)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Percussive Tools And Related Accessories (AREA)
EP96810629A 1995-12-07 1996-09-25 Perceuse rotative hélicoidale à percussion Expired - Lifetime EP0778390B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19545646A DE19545646A1 (de) 1995-12-07 1995-12-07 Drehschlag-Wendelbohrer
DE19545646 1995-12-07

Publications (3)

Publication Number Publication Date
EP0778390A2 true EP0778390A2 (fr) 1997-06-11
EP0778390A3 EP0778390A3 (fr) 1998-07-01
EP0778390B1 EP0778390B1 (fr) 2003-10-01

Family

ID=7779437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96810629A Expired - Lifetime EP0778390B1 (fr) 1995-12-07 1996-09-25 Perceuse rotative hélicoidale à percussion

Country Status (6)

Country Link
US (1) US5836408A (fr)
EP (1) EP0778390B1 (fr)
JP (1) JP3907756B2 (fr)
CN (1) CN1079045C (fr)
DE (2) DE19545646A1 (fr)
DK (1) DK0778390T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2868353A1 (fr) * 2004-04-01 2005-10-07 Hilti Ag Foret

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE533277C2 (sv) * 2008-12-19 2010-08-10 Sandvik Intellectual Property Borrkropp samt stödlist härför
JP5679042B2 (ja) * 2011-02-28 2015-03-04 株式会社タンガロイ ガイドパッド、切削工具本体および切削工具
JP5652540B2 (ja) * 2011-02-28 2015-01-14 株式会社タンガロイ ガイドパッド、切削工具本体および切削工具
CN102635309B (zh) * 2012-04-19 2017-10-17 平阳县鹏伟机械有限责任公司 一种冲击钻机的锤头
CN105750596B (zh) * 2015-12-08 2018-06-05 博世电动工具（中国）有限公司 钻头

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776819A (en) * 1953-10-09 1957-01-08 Philip B Brown Rock drill bit
US3858671A (en) * 1973-04-23 1975-01-07 Kennametal Inc Excavating tool
DE3544433C2 (de) * 1985-12-16 1995-12-14 Hilti Ag Gesteinsbohrer
DE3740692A1 (de) * 1987-09-18 1989-04-06 Hawera Probst Kg Hartmetall Gesteinsbohrer
DE3919095A1 (de) * 1988-07-16 1990-01-18 Hawera Probst Kg Hartmetall Bohrwerkzeug
DE3825107C2 (de) * 1988-07-23 1996-07-11 Hilti Ag Gesteinsbohrer mit Schneidplatte
DE4011441A1 (de) * 1990-04-09 1991-10-10 Hilti Ag Gesteinsbohrer
US5265688A (en) * 1990-04-09 1993-11-30 Hilti Aktiengesellschaft Rock drill

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2868353A1 (fr) * 2004-04-01 2005-10-07 Hilti Ag Foret

Also Published As

Publication number Publication date
JPH09177466A (ja) 1997-07-08
DE59610747D1 (de) 2003-11-06
CN1079045C (zh) 2002-02-13
JP3907756B2 (ja) 2007-04-18
DK0778390T3 (da) 2004-02-09
EP0778390A3 (fr) 1998-07-01
EP0778390B1 (fr) 2003-10-01
DE19545646A1 (de) 1997-06-12
US5836408A (en) 1998-11-17
CN1159382A (zh) 1997-09-17

Similar Documents

Publication Publication Date Title
DE2945766C2 (de) Bohrkrone und Bohrwerkzeug mit einer solchen Bohrkrone
EP0162190B1 (fr) Dispositif pour forer des formations souterraines optionellement verticalement ou en biais
EP0878261B1 (fr) Outil de forage
EP0778100B1 (fr) Foret héliocoidal de percussion
EP0778391A2 (fr) Perceuse rotative hélicoidale à percussion
DE3820695C2 (de) Gesteinsbohrer
DE19810192A1 (de) Bohrwerkzeug
DE19724373A1 (de) Gesteinsbohrer
EP0707129B1 (fr) Outil de forage avec support et éléments de coupe
WO1996014954A1 (fr) Outil de perçage
EP0452255B1 (fr) Trépan de roche
DE19810193A1 (de) Bohrwerkzeug
EP1316669A2 (fr) Outil de forage pour roche
DE2056091C3 (de) Spitzbohrwerkzeug
EP1083294B1 (fr) Outil de forage
EP0653544B1 (fr) Foret hélicoidal
EP1083295B1 (fr) Outil de forage
EP1455978B1 (fr) Outil de percage par percussion ou par martelage
EP0824626B1 (fr) Outil de forage
EP0778390B1 (fr) Perceuse rotative hélicoidale à percussion
EP1083293B1 (fr) Outil de forage
EP0891832A1 (fr) Foret
DE60317548T2 (de) Reameranordnung
DE4326000A1 (de) Stiftbohrkrone für das schlagende Bohren
DE2948665A1 (de) Schlagbohrer mit zentralem absaugkanal fuer das bohrklein

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): CH DE DK FR GB IT LI SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): CH DE DK FR GB IT LI SE

17P Request for examination filed

Effective date: 19990104

17Q First examination report despatched

Effective date: 20011120

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): CH DE DK FR GB IT LI SE

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REF Corresponds to:

Ref document number: 59610747

Country of ref document: DE

Date of ref document: 20031106

Kind code of ref document: P

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)

Effective date: 20031204

REG Reference to a national code

Ref country code: SE

Ref legal event code: TRGR

REG Reference to a national code

Ref country code: DK

Ref legal event code: T3

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20040702

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DK

Payment date: 20080912

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20080926

Year of fee payment: 13

Ref country code: FR

Payment date: 20080915

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080829

Year of fee payment: 13

Ref country code: CH

Payment date: 20081016

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20080908

Year of fee payment: 13

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20081001

Year of fee payment: 13

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: DK

Ref legal event code: EBP

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20090925

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100531

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090930

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100401

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090930

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090925

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090930

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090925

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20090926