WO2014027706A1 - 건설기계용 유압 제어밸브 - Google Patents
건설기계용 유압 제어밸브 Download PDFInfo
- Publication number
- WO2014027706A1 WO2014027706A1 PCT/KR2012/006507 KR2012006507W WO2014027706A1 WO 2014027706 A1 WO2014027706 A1 WO 2014027706A1 KR 2012006507 W KR2012006507 W KR 2012006507W WO 2014027706 A1 WO2014027706 A1 WO 2014027706A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- port
- pilot
- pilot pressure
- control valve
- pump
- Prior art date
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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
- E02F9/2264—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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0426—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with fluid-operated pilot valves, i.e. multiple stage 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
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot 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
-
- 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
- F15B13/025—Pressure reducing 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
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0422—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks
-
- 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/005—Leakage; Spillage; Hose burst
-
- 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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B2013/0428—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with switchable internal or external pilot pressure source
-
- 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
- F15B2211/32—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
- F15B2211/355—Pilot 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/635—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements
- F15B2211/6355—Circuits providing pilot pressure to pilot pressure-controlled fluid circuit elements having valve means
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7758—Pilot or servo controlled
- Y10T137/7762—Fluid pressure type
Definitions
- the present invention relates to a hydraulic control valve for construction machinery, and in particular, it is possible to prevent the secondary pilot pressure which is formed proportionally according to the switching of the switching device for driving the traveling motor, etc., to rise above the set pressure of the pilot pump.
- a hydraulic control valve for a construction machine To a hydraulic control valve for a construction machine.
- a valve spring 6 for elastically supporting the spool 5 to communicate the secondary pilot pressure port C and the tank port T is provided.
- a main hydraulic pump 7 (hereinafter referred to as a "hydraulic pump") and a pilot pump 8 connected to the engine (not shown),
- a hydraulic actuator 9 (referred to as an example driving motor) connected to the hydraulic pump 7;
- a main control valve 10 installed in a passage between the hydraulic pump 7 and the hydraulic actuator 9 to control the start, stop and direction change of the hydraulic actuator 9 at the time of switching;
- a control valve 12 installed in the signal pressure passage 11 connected to the passage 8a of the pilot pump 8, for switching the spool of the main control valve 10 in the switching direction during the switching;
- Pilot which is installed in the signal pressure passage 11 between the pilot pump 8 and the control valve 12 and forms the secondary pilot pressure proportionally when switching the spool 5 in proportion to the pressure of the switching device 3.
- Control valve (13)
- the hydraulic control valve which forms the secondary pilot pressure in the signal pressure passage 11 in proportion to the switching amount of the switching device 3 as described above, the hydraulic oil supplied from the hydraulic pump 7 to the hydraulic actuator 9.
- the high pressure is generated in the main control valve 10 to control the.
- an external connection device for example, refers to the hydraulic pressure port of the main control valve 10
- the hydraulic oil from HF can flow back to the secondary pilot port C via the switching signal passages a and b and the signal pressure passage 11.
- the secondary pilot pressure when the high pressure hydraulic oil flows back to the secondary pilot pressure port due to leakage occurring in the main control valve for controlling the hydraulic oil supplied to the hydraulic actuator, the secondary pilot pressure is converted into a pilot valve relief valve. It relates to a hydraulic control valve for a construction machine that can be kept below a set pressure.
- Hydraulic control valve for construction machinery according to an embodiment of the present invention
- a valve body having a port of the pilot pump into which the pilot pressure is introduced, a tank port from which the pilot pressure is drained, and a secondary pilot pressure port selectively communicating with the pilot pump port and the tank port;
- a switching device rotatably mounted on the valve body
- a pilot control valve having a spool which connects the port of the pilot pump at the time of switching due to the load shifting and the secondary pilot pressure port to form a secondary pilot pressure proportional to the switching amount of the switching device;
- a valve spring for elastically supporting the spool to communicate the secondary pilot pressure port with the tank port
- check poppet that is resealably installed in the pilot passage to allow one-way movement of the hydraulic oil from the secondary pilot pressure port to the port of the pilot pump.
- the traveling pedal can be used as the above-mentioned switching device.
- An excavator can be used as a construction machine to which the above-mentioned traveling pedal is mounted.
- Hydraulic control valve for a construction machine according to an embodiment of the present invention configured as described above has the following advantages.
- FIG. 1 is a hydraulic circuit diagram to which a hydraulic control valve for a construction machine according to the prior art is applied;
- FIG. 2 is an enlarged view of a portion A shown in FIG.
- FIG. 3 is a schematic view and a bottom view of a hydraulic control valve for a construction machine according to the prior art
- FIG. 4 is an enlarged view of a portion B shown in FIG.
- FIG. 5 is a cross-sectional view taken along the line A-A shown in FIG.
- FIG. 6 is a hydraulic circuit diagram to which a hydraulic control valve for a construction machine according to an embodiment of the present invention is applied;
- FIG. 7 is a schematic view of a hydraulic control valve for a construction machine according to an embodiment of the present invention.
- FIG. 8 is a cross-sectional view taken along line B-B shown in FIG. 7.
- Hydraulic control valve for a construction machine according to an embodiment of the present invention shown in Figure 6 to 8,
- a switching device (3) rotatably mounted to the valve body (1) by a fixing pin (2),
- the spool which connects the pilot pump port Pi and the secondary pilot pressure port C to form a secondary pilot pressure proportional to the switching amount of the switching device 3 ( 5) and a pilot control valve 20 is provided,
- a valve spring 6 elastically supporting the spool 5 so as to communicate the secondary pilot pressure port C and the tank port T;
- a check poppet 19 is provided to be openable and openable in the pilot passage 18 to allow one-way movement of the working oil from the secondary pilot pressure port C to the port Pi of the pilot pump.
- the traveling pedal can be used as the switching device 3 described above.
- An excavator can be used as a construction machine to which the above-mentioned traveling pedal is mounted.
- the secondary pilot pressure generated by the pilot control valve 20 is generated.
- the set pressure of the relief valve 14 is maintained. This may prevent damage to the pilot hydraulic components or failure of the hydraulic components due to the abnormal high pressure in the main control valve (10).
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- 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)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
Description
Claims (3)
- 파일럿 압력이 유입되는 파일럿 펌프의 포트와, 파일럿 압력이 드레인되는 탱크포트와, 상기 파일럿 펌프의 포트와 탱크포트에 선택적으로 연통되는 2차 파일럿 압력 포트가 형성되는 밸브바디와,상기 밸브바디에 회동가능하게 장착되는 절환장치와,상기 절환장치의 가압시 연동되어 시프팅되는 로드와,상기 로드 시프팅으로 인해 절환시 상기 파일럿 펌프의 포트와, 2차 파일럿 압력 포트를 연통시켜 상기 절환장치의 절환량에 비례하는 2차 파일럿 압력을 형성하는 스풀이 구비되는 파일럿 컨트롤밸브와,상기 2차 파일럿 압력 포트와 상기 탱크포트를 연통시키도록 상기 스풀을 탄성지지하는 밸브스프링과,상기 2차 파일럿 압력 포트에 입구측이 연통되고 상기 파일럿 펌프의 포트에 출구측이 연통되는 파일럿 통로와,상기 2차 파일럿 압력 포트에서 상기 파일럿 펌프의 포트로 작동유 일방향 이동을 허용하도록 상기 파일럿 통로에 개폐가능하게 설치되는 체크포펫을 구비하는 것을 특징으로 하는 건설기계용 유압 제어밸브.
- 제1항에 있어서, 상기 절환장치로서 주행페달이 사용되는 것을 특징으로 하는 건설기계용 유압 제어밸브.
- 제2항에 있어서, 상기 주행페달이 장착되는 건설기계는 굴삭기인 것을 특징으로 하는 건설기계용 유압 제어밸브.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/KR2012/006507 WO2014027706A1 (ko) | 2012-08-16 | 2012-08-16 | 건설기계용 유압 제어밸브 |
US14/419,829 US9759238B2 (en) | 2012-08-16 | 2012-08-16 | Hydraulic control valve for construction machinery |
KR1020157003721A KR101718836B1 (ko) | 2012-08-16 | 2012-08-16 | 건설기계용 유압 제어밸브 |
CN201280075146.1A CN104520595B (zh) | 2012-08-16 | 2012-08-16 | 用于施工机械的液压控制阀 |
CA2880733A CA2880733C (en) | 2012-08-16 | 2012-08-16 | Hydraulic control valve for construction machinery |
EP12891371.2A EP2886878B1 (en) | 2012-08-16 | 2012-08-16 | Hydraulic control valve for construction machinery |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/KR2012/006507 WO2014027706A1 (ko) | 2012-08-16 | 2012-08-16 | 건설기계용 유압 제어밸브 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014027706A1 true WO2014027706A1 (ko) | 2014-02-20 |
Family
ID=50685624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2012/006507 WO2014027706A1 (ko) | 2012-08-16 | 2012-08-16 | 건설기계용 유압 제어밸브 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9759238B2 (ko) |
EP (1) | EP2886878B1 (ko) |
KR (1) | KR101718836B1 (ko) |
CN (1) | CN104520595B (ko) |
CA (1) | CA2880733C (ko) |
WO (1) | WO2014027706A1 (ko) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6475522B2 (ja) * | 2015-03-13 | 2019-02-27 | 川崎重工業株式会社 | 油圧システム |
CN114076129B (zh) * | 2020-08-11 | 2024-10-01 | 徐州徐工液压件有限公司 | 信号控制阀和工程机械 |
Citations (4)
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JPH0925651A (ja) * | 1995-07-10 | 1997-01-28 | Hitachi Constr Mach Co Ltd | 油圧走行車両の油圧制御装置 |
JP2749611B2 (ja) * | 1989-02-10 | 1998-05-13 | 日立建機株式会社 | ロードセンシングシステムを用いた油圧駆動装置 |
JP2002213609A (ja) * | 2001-01-15 | 2002-07-31 | Komatsu Ltd | 油圧回路 |
JP2005207499A (ja) * | 2004-01-22 | 2005-08-04 | Hitachi Constr Mach Co Ltd | 建設機械の油圧回路 |
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GB1167703A (en) * | 1967-01-17 | 1969-10-22 | Kyoei Kaihatsu Kabushiki Kaish | A Pilot-Operated Valve Having a Short Delay in Opening |
EP0281635B1 (en) * | 1986-09-09 | 1991-02-27 | Hitachi Construction Machinery Co., Ltd. | Valve device |
US5333449A (en) * | 1991-09-02 | 1994-08-02 | Hitachi Construction Machinery Co., Ltd. | Pressure compensating valve assembly |
JPH08121408A (ja) * | 1994-10-18 | 1996-05-14 | Nishina Kogyo Kk | パイロットバルブ |
KR100193679B1 (ko) | 1996-07-08 | 1999-06-15 | 김형벽 | 휠 굴삭기의 엔진제어장치 |
US6907902B2 (en) * | 2001-11-08 | 2005-06-21 | Komatsu Ltd. | Hydraulic signal output device |
JP2006125627A (ja) * | 2004-09-29 | 2006-05-18 | Kobelco Contstruction Machinery Ltd | 建設機械の油圧回路 |
DE102005005928A1 (de) * | 2004-12-10 | 2006-06-14 | Bosch Rexroth Aktiengesellschaft | Steueranordnung und Vorsteuereinrichtung |
DE102006007935A1 (de) * | 2006-02-21 | 2007-10-25 | Liebherr France Sas | Steuervorrichtung und hydraulische Vorsteuerung |
JP4855124B2 (ja) * | 2006-04-06 | 2012-01-18 | 株式会社小松製作所 | ブルドーザ、作業機械及びブレードの自由落下方法 |
KR20100012008A (ko) | 2008-07-26 | 2010-02-04 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 선회 속도 조정시스템이 구비된 파이프 레이어 |
JP5203131B2 (ja) * | 2008-10-21 | 2013-06-05 | 日立建機株式会社 | 建設機械の油圧回路 |
KR101088754B1 (ko) * | 2009-10-20 | 2011-12-01 | 볼보 컨스트럭션 이큅먼트 에이비 | 유압 컨트롤밸브 |
CN103221696B (zh) | 2010-11-25 | 2016-05-11 | 沃尔沃建造设备有限公司 | 用于施工机械的流量控制阀 |
-
2012
- 2012-08-16 CN CN201280075146.1A patent/CN104520595B/zh active Active
- 2012-08-16 CA CA2880733A patent/CA2880733C/en active Active
- 2012-08-16 KR KR1020157003721A patent/KR101718836B1/ko active IP Right Grant
- 2012-08-16 WO PCT/KR2012/006507 patent/WO2014027706A1/ko active Application Filing
- 2012-08-16 US US14/419,829 patent/US9759238B2/en active Active
- 2012-08-16 EP EP12891371.2A patent/EP2886878B1/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2749611B2 (ja) * | 1989-02-10 | 1998-05-13 | 日立建機株式会社 | ロードセンシングシステムを用いた油圧駆動装置 |
JPH0925651A (ja) * | 1995-07-10 | 1997-01-28 | Hitachi Constr Mach Co Ltd | 油圧走行車両の油圧制御装置 |
JP2002213609A (ja) * | 2001-01-15 | 2002-07-31 | Komatsu Ltd | 油圧回路 |
JP2005207499A (ja) * | 2004-01-22 | 2005-08-04 | Hitachi Constr Mach Co Ltd | 建設機械の油圧回路 |
Also Published As
Publication number | Publication date |
---|---|
EP2886878B1 (en) | 2020-12-09 |
CN104520595A (zh) | 2015-04-15 |
EP2886878A4 (en) | 2016-04-06 |
US9759238B2 (en) | 2017-09-12 |
KR101718836B1 (ko) | 2017-03-22 |
CA2880733A1 (en) | 2014-02-20 |
EP2886878A1 (en) | 2015-06-24 |
CA2880733C (en) | 2017-07-18 |
US20150204360A1 (en) | 2015-07-23 |
KR20150040926A (ko) | 2015-04-15 |
CN104520595B (zh) | 2016-02-10 |
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