KR970075391A - 중장비의 재생장치 - Google Patents

중장비의 재생장치 Download PDF

Info

Publication number
KR970075391A
KR970075391A KR1019960017894A KR19960017894A KR970075391A KR 970075391 A KR970075391 A KR 970075391A KR 1019960017894 A KR1019960017894 A KR 1019960017894A KR 19960017894 A KR19960017894 A KR 19960017894A KR 970075391 A KR970075391 A KR 970075391A
Authority
KR
South Korea
Prior art keywords
flow path
regeneration
return
internal
tank
Prior art date
Application number
KR1019960017894A
Other languages
English (en)
Other versions
KR100305742B1 (ko
Inventor
정대승
이양구
Original Assignee
김무
삼성중공업 주식회사
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 김무, 삼성중공업 주식회사 filed Critical 김무
Priority to KR1019960017894A priority Critical patent/KR100305742B1/ko
Priority to US08/762,987 priority patent/US5791226A/en
Priority to GB9625701A priority patent/GB2313412A/en
Priority to DE19651504A priority patent/DE19651504A1/de
Priority to CN96120876A priority patent/CN1082116C/zh
Priority to JP8352207A priority patent/JPH09317704A/ja
Publication of KR970075391A publication Critical patent/KR970075391A/ko
Application granted granted Critical
Publication of KR100305742B1 publication Critical patent/KR100305742B1/ko

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • 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
    • E02F9/2217—Hydraulic or pneumatic drives with energy recovery arrangements, e.g. using accumulators, flywheels
    • 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
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/021—Valves for interconnecting the fluid chambers of an actuator
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/024—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits
    • F15B2011/0243—Systems essentially incorporating special features for controlling the speed or actuating force of an output member by means of differential connection of the servomotor lines, e.g. regenerative circuits the regenerative circuit being activated or deactivated automatically
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30505—Non-return valves, i.e. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/305—Directional control characterised by the type of valves
    • F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3122—Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
    • F15B2211/3133—Regenerative position connecting the working ports or connecting the working ports to the pump, e.g. for high-speed approach stroke
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
    • F15B2211/3157—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line
    • F15B2211/31576—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source, an output member and a return line having a single pressure source and a single output member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/30—Directional control
    • F15B2211/365—Directional control combined with flow control and pressure control
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/50—Pressure control
    • F15B2211/56—Control of an upstream pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
    • F15B2211/75—Control of speed of the output member

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Analytical Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)

Abstract

본 발명은 중장비의 재생장치에 관한 것으로, 특히 장비의 자중에 의해 작동하는 액유에이터의 귀환유량을 공급측으로 다시 이용하는 중장비의 재생장치에 있어서, 상기 액츄에이터를 구동하는 콘트롤밸브의 귀환측 내부유로상에 형성된 오리피스와, 상기 귀환측 내부유로와 탱크로 귀환하는 리턴유로 사이에 설치되어 상기 액츄에이터의 하강시 귀환측 내부유로와 연결되는 재생유로, 및 상기 오리피스를 통과한 내부유로를 분기하여 공급측 내부유로와 연결되어 탱크로 귀환되는 유량의 일부를 공급측에 공급하여 재생기능을 수행하는 내부재생회로를 구비하여 구성됨을 특징으로 하는 중장비의 재생장치에 관한 것이다.

Description

중장비의 재생장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제3도는 본 발명의 일실시예에 의한 중장비의 재생장치를 나타내는 굴삭기의 아암 콘트롤밸브의 개략도, 제4도는 제3도의 아암 콘트롤밸브와 관련된 유압회로도이다.

Claims (3)

  1. 장비의 자중에 의해 작동되는 액유에이터의 귀환유량을 공급측으로 다시 이용하는 중장비의 재생장치에 있어서: 상기 액츄에이터를 구동하는 콘트롤밸브의 귀환측 내부유로상에 형성된 오리피스; 상기 귀환측 내부 유로와 탱크로 귀환하는 리턴유로 사이에 설치되어 상기 액츄에이터의 하강시 귀환측 내부유로와 연결되는 재생유로; 및 상기 오리피스를 통과한 내부유로를 분기하여 공급측 내부유로와 연결되어 탱크로 귀환되는 유량의 일부를 공급측에 공급하여 재생기능을 수행하는 내부재생회로를 구비하여 구성됨을 특징으로 하는 중장비의 재생장치.
  2. 제1항에 있어서, 상기 재생유로에 설치되어 재생유로에 배압을 형성하는 제1체크밸브를 더 구비함을 특징으로 하는 중장비의 재생장치.
  3. 제1항에 있어서, 상기 내부재생회로에 설치되어 공급측에서 귀환측으로 작동유의 역류를 방지하는 제2체크밸브를 더 구비함을 특징으로 하는 중장비의 재생장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019960017894A 1996-05-25 1996-05-25 중장비의재생장치 KR100305742B1 (ko)

Priority Applications (6)

Application Number Priority Date Filing Date Title
KR1019960017894A KR100305742B1 (ko) 1996-05-25 1996-05-25 중장비의재생장치
US08/762,987 US5791226A (en) 1996-05-25 1996-12-10 Fluid regeneration device for construction vehicles
GB9625701A GB2313412A (en) 1996-05-25 1996-12-11 Fluid regeneration device for construction vehicles
DE19651504A DE19651504A1 (de) 1996-05-25 1996-12-11 Flüssigkeitsregeneriervorrichtung für Baufahrzeuge
CN96120876A CN1082116C (zh) 1996-05-25 1996-12-11 重型装备的反馈装置
JP8352207A JPH09317704A (ja) 1996-05-25 1996-12-12 重装備の再生装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019960017894A KR100305742B1 (ko) 1996-05-25 1996-05-25 중장비의재생장치

Publications (2)

Publication Number Publication Date
KR970075391A true KR970075391A (ko) 1997-12-10
KR100305742B1 KR100305742B1 (ko) 2001-11-30

Family

ID=19459756

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019960017894A KR100305742B1 (ko) 1996-05-25 1996-05-25 중장비의재생장치

Country Status (6)

Country Link
US (1) US5791226A (ko)
JP (1) JPH09317704A (ko)
KR (1) KR100305742B1 (ko)
CN (1) CN1082116C (ko)
DE (1) DE19651504A1 (ko)
GB (1) GB2313412A (ko)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6267041B1 (en) 1999-12-15 2001-07-31 Caterpillar Inc. Fluid regeneration circuit for hydraulic cylinders
DE10004905C2 (de) * 2000-02-04 2002-10-24 Orenstein & Koppel Ag Verfahren und Vorrichtung zur Steuerung eines Hubzylinders insbesondere von Arbeitsmaschinen
AT408331B (de) * 2000-02-17 2001-10-25 Hoerbiger Hydraulik Betätigungsanordnung für bewegte teile an fahrzeugen, insbesondere heckdeckel, verdeckklappen, motorhauben od.dgl.
JP4454131B2 (ja) * 2000-09-26 2010-04-21 日立建機株式会社 建設機械の油圧再生装置及び建設機械
US6892535B2 (en) * 2002-06-14 2005-05-17 Volvo Construction Equipment Holding Sweden Ab Hydraulic circuit for boom cylinder combination having float function
US6996982B2 (en) * 2003-12-09 2006-02-14 The United States Of America As Represented By The Administrator Of The Environmental Protection Agency Method and device for switching hydraulic fluid supplies, such as for a hydraulic pump/motor
KR100611713B1 (ko) * 2004-10-14 2006-08-11 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 재생기능을 구비한 유압제어밸브
JP4762022B2 (ja) * 2006-03-27 2011-08-31 カヤバ工業株式会社 エネルギー変換装置
KR101421727B1 (ko) * 2007-11-01 2014-07-24 두산인프라코어 주식회사 건설 기계의 버켓 급락 방지장치
US7913491B2 (en) * 2007-11-30 2011-03-29 Caterpillar Inc. Hydraulic flow control system and method
US20100122528A1 (en) * 2008-11-19 2010-05-20 Beschorner Matthew J Hydraulic system having regeneration and supplemental flow
KR100985814B1 (ko) * 2010-02-18 2010-10-08 파카코리아 주식회사 캐비테이션 방지장치가 구비된 더블 파일롯 체크밸브
CN102864798B (zh) * 2012-10-22 2015-01-14 三一重机有限公司 一种斗杆再生结构及挖掘机
CN104919116B (zh) * 2013-01-18 2017-12-19 沃尔沃建造设备有限公司 用于工程机械的控流装置和控流方法
WO2015167041A1 (ko) * 2014-04-29 2015-11-05 볼보 컨스트럭션 이큅먼트 에이비 건설기계용 유량제어밸브
JP6292037B2 (ja) * 2014-06-06 2018-03-14 コベルコ建機株式会社 建設機械
KR101942638B1 (ko) * 2017-02-09 2019-04-11 맥스엔지니어링(주) 3 방향 2 위치 내충격성 고유량 재생 밸브 조립체
JP6991752B2 (ja) * 2017-06-30 2022-01-13 ナブテスコ株式会社 アンチキャビテーション油圧回路
JP7208701B2 (ja) * 2018-12-13 2023-01-19 キャタピラー エス エー アール エル 建設機械の油圧制御回路
JP7387574B2 (ja) * 2020-10-13 2023-11-28 株式会社クボタ 作業機の油圧システム

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1207907B (it) * 1979-07-11 1989-06-01 Oil Control Spa Valvola perfezionata a sbloccaggiooleodinamico bilanciata in particolare per consentire comandi in serie ad elevata pressione a piu azionatori idraulici
US4359931A (en) * 1981-01-19 1982-11-23 The Warner & Swasey Company Regenerative and anticavitation hydraulic system for an excavator
US4723476A (en) * 1982-02-22 1988-02-09 The Cessna Aircraft Company Regenerative valve
EP0197467B1 (de) * 1985-04-11 1992-01-29 Beringer-Hydraulik AG Leckfreies Brems-Sperrventil
US4836088A (en) * 1985-08-21 1989-06-06 Rome Industries, Inc. Directional control valve and regeneration valve
JPH0276905A (ja) * 1988-09-12 1990-03-16 Kayaba Ind Co Ltd 液圧シリンダの制御回路
JPH081202B2 (ja) * 1989-04-03 1996-01-10 株式会社豊田自動織機製作所 単動式油圧シリンダの作動回路
US5400816A (en) * 1990-10-05 1995-03-28 Dana Corporation Pilot actuated override mechanism for holding valve
DE4107776A1 (de) * 1991-03-11 1992-09-17 Heilmeier & Weinlein Hydraulische steuervorrichtung
US5220862A (en) * 1992-05-15 1993-06-22 Caterpillar Inc. Fluid regeneration circuit
US5237916A (en) * 1992-06-18 1993-08-24 John T. Hepburn, Limited Regenerative hydraulic cylinders with internal flow paths
DE69302012T2 (de) * 1992-12-04 1996-09-05 Hitachi Construction Machinery Co., Ltd., Tokio/Tokyo Hydraulischer regenerator
US5370038A (en) * 1992-12-21 1994-12-06 Caterpillar Inc. Regeneration circuit for a hydraulic system
US5415076A (en) * 1994-04-18 1995-05-16 Caterpillar Inc. Hydraulic system having a combined meter-out and regeneration valve assembly

Also Published As

Publication number Publication date
GB9625701D0 (en) 1997-01-29
DE19651504A1 (de) 1997-11-27
KR100305742B1 (ko) 2001-11-30
US5791226A (en) 1998-08-11
JPH09317704A (ja) 1997-12-09
CN1082116C (zh) 2002-04-03
GB2313412A (en) 1997-11-26
CN1166559A (zh) 1997-12-03

Similar Documents

Publication Publication Date Title
KR970075391A (ko) 중장비의 재생장치
KR970043644A (ko) 유압셔블의 유압회로
KR910017087A (ko) 유압구동장치
KR970075393A (ko) 가변 재생기능이 구비된 중장비용 콘트롤밸브
KR900004549A (ko) 안티톡용 모듈레이터
KR960704126A (ko) 유압굴삭기의 유압회로장치(hydraulic circuit system for hydraulic excavator)
KR900003012A (ko) 앤티록용 액압제어장치
KR920701694A (ko) 작업기 실린더의 조작유압 회로장치
KR960008078A (ko) 유압셔블의 붐실린더용 유압회로
KR840009275A (ko) 파워스티어링장치
KR920701692A (ko) 작업기용 유압 실린더로의 압유 공급 회로 장치
KR960041765A (ko) 유압제어장치
KR960011173A (ko) 유압모터의 캐비테이션 방지장치
KR900001936A (ko) 백호우의 유압회로
KR900701592A (ko) 건설차량의 유압회로장치
KR960008133A (ko) 낙하방지 밸브장치
KR930008340A (ko) 브레이크 액압 제어장치
KR970065291A (ko) 동력타취장치
KR970070584A (ko) 전기 유압 제어밸브
KR900014771A (ko) 작업차의 승강 장치용 유압회로
KR950033161A (ko) 브레이크 유압 제어기
US929852A (en) Fluid-distributing system.
JP2002317801A (ja) 油圧差動装置
JP2788134B2 (ja) 液圧式制御装置
KR960031813A (ko) 작동유 온도 및 캐비테이션 발생을 고려한 건설 중장비용 유압장치

Legal Events

Date Code Title Description
N231 Notification of change of applicant
A201 Request for examination
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20090630

Year of fee payment: 9

LAPS Lapse due to unpaid annual fee