EP1300519A9 - Hydraulischer kreislauf und notbetriebsverfahren eines anbaugerätes - Google Patents

Hydraulischer kreislauf und notbetriebsverfahren eines anbaugerätes Download PDF

Info

Publication number
EP1300519A9
EP1300519A9 EP01934472A EP01934472A EP1300519A9 EP 1300519 A9 EP1300519 A9 EP 1300519A9 EP 01934472 A EP01934472 A EP 01934472A EP 01934472 A EP01934472 A EP 01934472A EP 1300519 A9 EP1300519 A9 EP 1300519A9
Authority
EP
European Patent Office
Prior art keywords
pilot
hydraulic
pressure
control valve
oil
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
EP01934472A
Other languages
English (en)
French (fr)
Other versions
EP1300519B1 (de
EP1300519A4 (de
EP1300519A1 (de
Inventor
Hiroshi Onoue
Yasushi Tanaka
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.)
Hitachi Construction Machinery Co Ltd
Original Assignee
Hitachi Construction Machinery Co Ltd
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 Hitachi Construction Machinery Co Ltd filed Critical Hitachi Construction Machinery Co Ltd
Publication of EP1300519A1 publication Critical patent/EP1300519A1/de
Publication of EP1300519A9 publication Critical patent/EP1300519A9/de
Publication of EP1300519A4 publication Critical patent/EP1300519A4/de
Application granted granted Critical
Publication of EP1300519B1 publication Critical patent/EP1300519B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2282—Systems using center bypass type changeover valves
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2278—Hydraulic circuits
    • E02F9/2285—Pilot-operated systems

Definitions

  • the present invention relates to a hydraulic circuit of a construction machine that drives an actuator for front attachment drive by using a hydraulic pilot control valve and it also relates to an attachment emergency drive method.
  • This hydraulic circuit drives a boom cylinder by employing a hydraulic pilot control valve. It includes a bypass line which is capable of communicating between the cylinder chamber of the boom cylinder and a hydraulic pilot line, with a manual switching valve provided in the bypass line.
  • a hydraulic pilot control valve By manually operating the switching valve when the front attachment, which includes the boom, becomes suspended above the ground, the pressure in the cylinder chamber of the boom cylinder (the pressure attributable to the dead weight of the attachment) is guided to the pilot line via the bypass line. Then, the pressure is applied to the pilot port of the control valve to switch the control valve to the boom-down position.
  • the cylinder chamber comes into communication with the reservoir via the control valve and the boom is caused to descend by its dead weight.
  • the hydraulic circuit disclosed in the publication mentioned above requires additional components such as the bypass line and the manual switching valve.
  • the hydraulic circuit in the second related art which must be provided with the accumulator, is bound to be costly due to the inevitable increase in the number of components.
  • An object of the present invention is to provide a hydraulic circuit of a construction machine that is capable of driving a front attachment in an emergency with a high degree of safety while assuming a fairly simple structure.
  • the present invention is adopted in a construction machine hydraulic circuits comprising a hydraulic pump that is driven by an engine, an actuator that is driven with the oil discharged from the hydraulic pump and drives a front attachment and a hydraulic pilot control valve that is switched by a pilot oil pressure to control the inflow/outflow of pressure oil to/from the actuator.
  • the object described above is achieved by providing a pressure oil injection port that can be connected with a manual hydraulic pump (hydraulic source) at a pilot line through which the pilot oil pressure is guided to the control valve and by supplying the pressure oil to the pilot line from the port via the manual hydraulic pump to enable switching of the control valve.
  • the front attachment include a boom with the pressure oil injection port provided at the pilot line on the boom-down side.
  • the pressure oil injection port is provided at a position which is off the travelling locus of the front attachment.
  • the manual hydraulic pump may be constituted by using a grease gun, which is a standard maintenance/inspection tool provided with a construction machine.
  • the present invention is adopted in a method of driving an attachment of a construction machine in an emergency.
  • An emergency pilot oil pressure is generated by using a manual grease gun or the like at a pilot line through which a pilot oil pressure is guided to a control valve, and an actuator is engaged in operation by switching the control valve with the pressure oil to drive the attachment.
  • the pressure oil is supplied to the pilot line from a pressure oil injection port provided at the pilot line with a manual hydraulic pump (e.g., a grease gun) to switch the control valve
  • a manual hydraulic pump e.g., a grease gun
  • emergency drive of the front attachment is achieved through a fairly simple modification.
  • a bypass line, a switching valve, an accumulator or the like as required in the related art, a reduction in the production costs is achieved.
  • the pressure oil injection port at a position which is off the traveling locus of the front attachment, the pressure oil supply can be carried out while assuring safety.
  • FIG. 1 shows the hydraulic excavator achieved in the embodiment.
  • a front attachment FA which is linked to an upper swiveling body is constituted of a boom 2 driven by a boom cylinder 1, an arm 4 driven by an arm cylinder 3 and a bucket 6 driven by a bucket cylinder 5.
  • FIG. 2 illustrates the boom drive hydraulic circuit of the hydraulic excavator.
  • a hydraulic pilot-operated control valve 12 is provided between a hydraulic pump 11 which is driven by an engine (not shown) and the boom cylinder 1. The flow rate and the direction of the pressure oil flowing into and out from the boom cylinder 1 are controlled by switching the control valve 12.
  • the control valve 12 is switched by the pilot oil pressure at a pilot hydraulic circuit 20.
  • the pilot hydraulic circuit 20 includes a pilot hydraulic pump 21, pilot valves (pressure reducing valves) 22a and 22b that reduce the discharged pressure at the pilot hydraulic pump 21 and pilot lines 23a and 23b that guide the secondary pressures from the pilot valves 22a and 22b to pilot ports 12a and 12b of the control valve 12.
  • the pilot valves 22a and 22b are operated through an operating lever 22c provided at the driver's cab.
  • a stop valve 24 (opening/closing valve) is mounted at one of the pilot lines 23a and 23b, i.e., the line 23b on the boom-down side.
  • the line which is located on the upstream side relative to the stop valve 24, is referred to as a line 23bU and the line located on the downstream side is referred to as a line 23bL.
  • a hydraulic coupling 26 is mounted at a pressure oil injection port 25 provided at the line 23bL on the downstream side relative to the stop valve 24, a hydraulic coupling 26 is mounted at a position (e.g., at a lower portion of the cabin) that facilitates the pressure oil injection process and is also off the traveling locus of the front attachment FA in consideration of the safety factor.
  • the stop valve 24 is in an open state and the pressure oil injection port 25 is closed by the hydraulic coupling 26 and, as a result, the secondary pressure from the pilot valve 22b is applied to the pilot port 12b without hindrance.
  • the pressure oil is supplied manually to the pilot line 23bU from the injection port 25.
  • This manual process is implemented by using a grease gun 30 such as that shown in FIG. 3.
  • the grease gun 30 is provided as standard equipment with the hydraulic excavator to be utilized when replenishing grease at the joints and the like of the front attachment FA. According to the present invention, it is used as a manual hydraulic pump (hydraulic source) for pressure oil supply. The procedure and effect of utilizing the grease gun 30 as a manual hydraulic pump are to be detailed later.
  • the operator tightens the stop valve 24 located at the boom-down side pilot line 23b to prevent the pressure oil from flowing into the line 23bU located toward the pilot valve 22b.
  • he injects the pressure oil from the injection port 25 with the grease gun 30. He loads a cartridge filled with hydraulic fluid in place of a cartridge filled with grease, and connects a hydraulic coupling 32 provided at the front tip of a hose 31 (see FIG. 3) of the grease gun 30 to the hydraulic coupling 26 of the injection port 25.
  • the operator uses the grease gun 30 in this state to inject the hydraulic fluid into the pilot line 23bL to be used as pressure oil (emergency pilot oil pressure). Since the stop valve 24 is closed, the injected pressure oil is guided to the pilot port 12b of the control valve 12 to switch the control valve 12 to the right side position in the figure. Since this allows the bottom chamber 1a of the boom cylinder 1 to come into communication with the reservoir 13 via the control valve 12, the boom 2 is caused to descend by its own weight, until it stops once the bucket 6 is lowered to the ground.
  • pressure oil evolved pilot oil pressure
  • the control valve 12 is switched to lower the boom 2 in the embodiment. Consequently, since the only modification that is required is to provide the pressure oil injection port 25 at the pilot line 23bL, a reduction in the production cost is achieved over the related art methods.
  • the extent to which the control valve 12 is switched can be adjusted by varying the degree of pressure oil injection, and thus, the speed with which the boom descends can be controlled freely.
  • the pressure oil injection port 25 is provided at a position that is off the traveling locus of the front attachment FA, assuring a high degree of safety.
  • members fulfilling functions similar to those in the first embodiment are assigned with reference numerals in the hundreds, with each of these reference numerals sharing the same last two digits with the corresponding member in the first embodiment.
  • a cabin 51, an engine 52, a hydraulic pump 111, a control valve unit VU and the like are mounted at the upper swiveling body of the hydraulic excavator.
  • a front attachment FA' is connected to the right of the upper swiveling body in the figure.
  • the front attachment FA' is constituted of a boom 102 driven by a boom cylinder 101, an arm 104 driven by an arm cylinder 103, a bucket 106 driven by a bucket cylinder 105 and the like.
  • the boom 102 is constituted of a base end portion 102A and a front end portion 102B, and its front end portion 102B is caused to rotate relative to the bottom end portion 102A as shown in FIG. 5 as an offset cylinder 61 expands/contracts.
  • a cylinder stay 62 rotatably linked to the front end portion 102B travels to the left and to the right while remaining parallels to the bottom end portion 102A as the front end portion 102B rotates, which causes the arm 104 and the bucket 106 connected to its front end to become offset to the left or the right as one.
  • the hydraulic excavator is enabled to excavate sideways to dig a trench in the ground at its side.
  • FIG. 6 shows the boom drive hydraulic circuit in the hydraulic excavator achieved in the second embodiment. It differs from the hydraulic circuit shown in FIG. 2 in that its pilot lines 123a and 123b are respectively connected to pilot ports 112a and 112b of a control valve 112 via a solenoid valve unit 70.
  • the solenoid valve unit 70 is provided near the bottom of the cabin 51, as shown in FIG. 4.
  • the pilot lines for enabling drive of the individual actuators are connected via the solenoid valve unit 70 to the pilot ports of the control valve corresponding to the individual actuators.
  • the solenoid valve unit 70 includes a plurality of ports (input and output ports) to which the individual lines are connected. By changing the ports to which the individual lines are connected, different pilot lines can be selected for driving the individual actuators. This configuration is widely adopted in order to support the driving operation characteristics of a given operator when a plurality of actuators are operated through a single operating valve.
  • a coupling or the like is provided at a port of the solenoid valve unit 70 so as to allow the grease gun mentioned earlier to be connected to the port, and the port is utilized as an emergency pressure oil injection port.
  • the operator performs a manual boom-down operation if the engine 52 comes to an emergency stop while the boom 102 is raised and the bucket 106 is suspended above the ground as described earlier and the attitude of the front attachment FA' determines whether the boom 102 is to be lowered to the front or to the rear. If the position of the center of gravity of the front attachment FA' is further frontward relative to the boom rotational axis, the boom 102 is lowered to the front, whereas if the position of the center of gravity is further rearward, the boom is lowered to the rear.
  • the line 123b is disengaged from a port 70b (see FIG. 6) to which the boom-down side pilot line 123b is connected among the input ports of the solenoid valve unit 70.
  • the hose of the grease gun 30 is connected to the port 70b.
  • a cartridge filled with hydraulic fluid is loaded in advance at the grease gun 30.
  • the disengaged line 123b should be plugged (not shown) so as to ensure that no hydraulic fluid spills out.
  • the operator operates the grease gun 30 to inject the hydraulic fluid into the pilot line 123b to be used as pressure oil, thereby switching the control valve 112 to the right side position.
  • the bottom chamber 101a of the boom cylinder 101 comes into communication with the reservoir 113 and the boom 102 is caused to descend to the front by its own weight.
  • a boom-down operation may be also achieved by releasing the pressure oil from an overload relief valve (not shown) provided at an intake/outlet line of the boom cylinder 101, for instance.
  • the overload relief valve is normally formed as an integrated part of the control valve 112 constituting the control valve unit VU, the pressure oil must be drawn out from the control valve unit VU.
  • the control valve unit VU is provided on the right side of the cabin 51 and thus, when the front attachment FA' is offset to the right, as shown in FIG. 5, the vicinity of the control valve unit VU falls within the traveling locus of the front attachment FA'. For this reason, a safety concern arises with regard to the boom-down operation implemented at the control valve unit VU.
  • the attachment to be manually driven is not limited to the boom and the present invention may be adopted in conjunction with any other attachment that needs to be moved in an emergency.
  • the construction machine does not need to be a hydraulic excavator. While pressure oil is injected with a grease gun, another manual hydraulic pump may be used in place of the grease gun.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Cleaning In General (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Component Parts Of Construction Machinery (AREA)
EP01934472A 2000-05-31 2001-05-31 Baumaschine mit einem hydraulischen kreislauf und notbetriebsverfahren eines anbaugerätes. Expired - Lifetime EP1300519B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2000161468A JP2001336177A (ja) 2000-05-31 2000-05-31 建設機械の油圧回路およびアタッチメント緊急駆動方法
JP2000161468 2000-05-31
PCT/JP2001/004625 WO2001092651A1 (en) 2000-05-31 2001-05-31 Hydraulic circuit and attachment emergency drive method for construction machinery

Publications (4)

Publication Number Publication Date
EP1300519A1 EP1300519A1 (de) 2003-04-09
EP1300519A9 true EP1300519A9 (de) 2003-08-06
EP1300519A4 EP1300519A4 (de) 2009-03-11
EP1300519B1 EP1300519B1 (de) 2010-12-22

Family

ID=18665488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01934472A Expired - Lifetime EP1300519B1 (de) 2000-05-31 2001-05-31 Baumaschine mit einem hydraulischen kreislauf und notbetriebsverfahren eines anbaugerätes.

Country Status (4)

Country Link
EP (1) EP1300519B1 (de)
JP (1) JP2001336177A (de)
DE (1) DE60143698D1 (de)
WO (1) WO2001092651A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7464493B2 (en) 2004-09-10 2008-12-16 Hitachi Construction Machinery Co., Ltd. Work machine

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011226104A (ja) * 2010-04-16 2011-11-10 Hitachi Constr Mach Co Ltd 長尺フロントの動力異常停止時降下装置と降下方法
US9085873B2 (en) 2011-12-23 2015-07-21 Caterpillar Inc. Hydraulic system for controlling a work implement
US9790964B2 (en) 2014-09-25 2017-10-17 Cnh Industrial America Llc Hydraulic system
US9708796B2 (en) 2014-09-25 2017-07-18 Cnh Industrial America Llc Hydraulic valve
WO2025063195A1 (ja) * 2023-09-20 2025-03-27 日立建機株式会社 作業機械

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5976659A (ja) 1982-10-25 1984-05-01 Nippon Kokan Kk <Nkk> 地金洗浄用バ−ナ−
JPH0617885Y2 (ja) * 1987-04-14 1994-05-11 セイレイ工業株式会社 バツクホ−における作業機の降下に対する安全装置
JPH0693630A (ja) 1992-09-11 1994-04-05 Hitachi Constr Mach Co Ltd 作業機用バケット制御装置
JPH07317713A (ja) * 1994-05-27 1995-12-08 Yutani Heavy Ind Ltd 建設機械の油圧回路
JP2000096631A (ja) * 1998-09-18 2000-04-04 Hitachi Constr Mach Co Ltd 油圧ショベルの油圧回路

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7464493B2 (en) 2004-09-10 2008-12-16 Hitachi Construction Machinery Co., Ltd. Work machine

Also Published As

Publication number Publication date
EP1300519B1 (de) 2010-12-22
WO2001092651A1 (en) 2001-12-06
EP1300519A4 (de) 2009-03-11
DE60143698D1 (de) 2011-02-03
JP2001336177A (ja) 2001-12-07
EP1300519A1 (de) 2003-04-09

Similar Documents

Publication Publication Date Title
US6564548B2 (en) Speed control apparatus of working vehicle and speed control method thereof
US6330797B1 (en) Hydraulic circuit for turning excavator
KR101932304B1 (ko) 작업 기계의 유압 구동 장치
JP4137431B2 (ja) 油圧回路
EP1980674B1 (de) Hydraulische Steuervorrichtung für eine Bearbeitungsmaschine
JP2702646B2 (ja) バックホウ装置の油圧回路構造
JPH1113091A (ja) 建設機械の油圧駆動装置
KR102082028B1 (ko) 붐 에너지 회생 제어 회로 및 제어 방법
JP5091034B2 (ja) 建設機械の油圧回路装置
EP3683453B1 (de) Antriebsvorrichtung für baumaschinen
EP1300519B1 (de) Baumaschine mit einem hydraulischen kreislauf und notbetriebsverfahren eines anbaugerätes.
JP2004301215A (ja) 作業用車両の油圧駆動装置
US12018458B2 (en) Construction machine
US20030115864A1 (en) Hydraulic power boost system for a work vehicle
US11859367B2 (en) Construction machine
JP4260850B2 (ja) 油圧回路
KR102849222B1 (ko) 구동 장치 및 건설 기계
JP2721383B2 (ja) 作業機械の油圧回路
JP2018168916A (ja) 建設機械の油圧制御装置
JP2000096631A (ja) 油圧ショベルの油圧回路
JP2871112B2 (ja) 建設機械の旋回回路
CN218760670U (zh) 液压控制系统及作业机械
JPH10331209A (ja) パワーショベルのアーム作動回路
EP4382675A1 (de) Baumaschine
JP2018172878A (ja) 建設機械

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

17P Request for examination filed

Effective date: 20020701

AK Designated contracting states

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH CY DE FR GB IT LI NL

A4 Supplementary search report drawn up and despatched

Effective date: 20090211

17Q First examination report despatched

Effective date: 20090904

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RTI1 Title (correction)

Free format text: CONSTRUCTION MACINE WITH A HYDRAULIC CIRCUIT AND ATTACHMENT EMERGENCY DRIVE METHOD.

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB IT NL

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60143698

Country of ref document: DE

Date of ref document: 20110203

Kind code of ref document: P

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 60143698

Country of ref document: DE

Effective date: 20110203

REG Reference to a national code

Ref country code: NL

Ref legal event code: T3

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

Ref country code: FR

Payment date: 20110607

Year of fee payment: 11

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

Ref country code: GB

Payment date: 20110520

Year of fee payment: 11

Ref country code: NL

Payment date: 20110523

Year of fee payment: 11

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

Ref country code: IT

Payment date: 20110524

Year of fee payment: 11

Ref country code: DE

Payment date: 20110520

Year of fee payment: 11

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: 20110923

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 60143698

Country of ref document: DE

Effective date: 20110923

REG Reference to a national code

Ref country code: NL

Ref legal event code: V1

Effective date: 20121201

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

Effective date: 20120531

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: 20120531

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20130131

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 60143698

Country of ref document: DE

Effective date: 20121201

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

Ref country code: NL

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

Effective date: 20121201

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: 20120531

Ref country code: GB

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

Effective date: 20120531

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

Ref country code: DE

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

Effective date: 20121201