KR970075393A - 가변 재생기능이 구비된 중장비용 콘트롤밸브 - Google Patents
가변 재생기능이 구비된 중장비용 콘트롤밸브 Download PDFInfo
- Publication number
- KR970075393A KR970075393A KR1019960017288A KR19960017288A KR970075393A KR 970075393 A KR970075393 A KR 970075393A KR 1019960017288 A KR1019960017288 A KR 1019960017288A KR 19960017288 A KR19960017288 A KR 19960017288A KR 970075393 A KR970075393 A KR 970075393A
- Authority
- KR
- South Korea
- Prior art keywords
- regeneration
- passage
- pressure
- valve
- control valve
- Prior art date
Links
Classifications
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- 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
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
- F15B13/0403—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves a secondary valve member sliding within the main spool, e.g. for regeneration flow
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- 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
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- 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
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- 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
- 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
- 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
- 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
- F15B2011/0246—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 with variable regeneration flow
-
- 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
- F15B2211/3053—In combination with a pressure compensating valve
- F15B2211/3055—In combination with a pressure compensating valve the pressure compensating valve is arranged between directional control valve and return line
-
- 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
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- 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
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- 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
- F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional 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
- F15B2211/315—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
- F15B2211/35—Directional control combined with flow 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
- F15B2211/30—Directional control
- F15B2211/355—Pilot pressure control
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- 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
- Y10T137/8593—Systems
- Y10T137/87169—Supply and exhaust
- Y10T137/87233—Biased exhaust valve
- Y10T137/87241—Biased closed
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)
- Check Valves (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
본 발명은 가변 재생기능이 구비된 중장비용 콘트롤밸브에 관한 것으로, 특히 액츄에이터 작동회로의 귀환통로와 탱크통로 사이에 재생통로를 설치하고 재생통로에는 공급측에서 귀환측으로 역류가 방지되도록 체크밸브를 설치하고, 재생통로와 탱크통로 사이에는 개구량을 조절할 수 있는 재생절환스풀을 설치함과 아울러 상기 재생절환스풀은 공급측 통로의 압력과 밸브스프링의 압력이 상호작용하여 절환됨에 따라 재생되는 압유량을 제어하는 재생기능이 구비된 중장비용 콘트롤밸브에 있어서, 상기 절환스풀의 절환압력을 결정하는 밸브스프링의 단부에 설치되어 외부신호에 의해 이동함에 따라 상기 밸브스프링의 탄성력을 가감시키는 수단을 구비하여 구성됨을 특징으로 하는 가변 재생기능이 구비된 중장비용 콘트롤밸브에 관한 것이다.
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제3도는 본 발명의 일실시예에 의한 가변 재생기능이 구비된 아암 콘트롤밸브를 나타내는 개략도, 제4도는 제3도의 아암 콘트롤밸브와 관련된 유압회로도이다.
Claims (2)
- 액츄에이터 작동회로의 귀환통로와 탱크통로 사이에 재생통로를 설치하고 재생통로에는 공급측에서 귀환측으로 역류가 방지되도록 체크밸브를 설치하고, 재생통로와 탱크통로 사이에는 개구량을 조절할 수 있는 재생절환스풀을 설치함과 아울러 상기 재생절환스풀은 공급측 통로의 압력과 밸브스프링의 압력이 상호작용하여 절환됨에 따라 재생되는 압유량을 제어하는 재생기능이 구비된 중장비용 콘트롤밸브에 있어서; 상기 절환스풀의 절환압력을 결정하는 밸브스프링의 단부에 설치되어 외부신호에 의해 이동함에 따라 상기 밸브스프링의 탄성력을 가감시키는 수단을 구비하여 구성됨을 특징으로 하는 가변 재생기능이 구비된 중장비용 콘트롤밸브.
- 제1항에 있어서, 상기 수단은, 상기 외부신호에 의하여 입력되는 전기량에 비례하여 압유를 출력하는 전자비례밸브를 통하여 전달되어 연속적으로 위치이동하는 피스톤임을 특징으로 하는 가변 재생기능이 구비된 중장비용 콘트롤밸브.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960017288A KR100208732B1 (ko) | 1996-05-21 | 1996-05-21 | 가변 재생기능이 구비된 중장비용 콘트롤밸브 |
DE19650798A DE19650798B4 (de) | 1996-05-21 | 1996-12-06 | Wegeventil mit variabler Rückgewinnung für Baufahrzeuge |
US08/762,989 US5862831A (en) | 1996-05-21 | 1996-12-10 | Variable-regeneration directional control valve for construction vehicles |
GB9625702A GB2313413B (en) | 1996-05-21 | 1996-12-11 | Variable-regeneration directional control valve for construction vehicles |
CN96120887A CN1095960C (zh) | 1996-05-21 | 1996-12-11 | 具备可变反馈功能的重型装备用控制阀 |
JP35220896A JP3741502B2 (ja) | 1996-05-21 | 1996-12-12 | 可変再生が備えられた重装備用のコントロールバルブ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1019960017288A KR100208732B1 (ko) | 1996-05-21 | 1996-05-21 | 가변 재생기능이 구비된 중장비용 콘트롤밸브 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR970075393A true KR970075393A (ko) | 1997-12-10 |
KR100208732B1 KR100208732B1 (ko) | 1999-07-15 |
Family
ID=19459391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019960017288A KR100208732B1 (ko) | 1996-05-21 | 1996-05-21 | 가변 재생기능이 구비된 중장비용 콘트롤밸브 |
Country Status (6)
Country | Link |
---|---|
US (1) | US5862831A (ko) |
JP (1) | JP3741502B2 (ko) |
KR (1) | KR100208732B1 (ko) |
CN (1) | CN1095960C (ko) |
DE (1) | DE19650798B4 (ko) |
GB (1) | GB2313413B (ko) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100468623B1 (ko) * | 2001-12-12 | 2005-01-27 | 한일유압 주식회사 | 암재생용 스풀을 갖는 굴삭기 컨트롤밸브의 암 재생장치 |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9813660D0 (en) | 1998-06-24 | 1998-08-26 | British Aerospace | Actuator system for aerospace controls and functions |
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 |
US6701822B2 (en) | 2001-10-12 | 2004-03-09 | Caterpillar Inc | Independent and regenerative mode fluid control system |
US6715403B2 (en) | 2001-10-12 | 2004-04-06 | Caterpillar Inc | Independent and regenerative mode fluid control system |
KR100621983B1 (ko) * | 2004-07-23 | 2006-09-14 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 중장비용 가변 재생밸브 |
KR100611713B1 (ko) * | 2004-10-14 | 2006-08-11 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 재생기능을 구비한 유압제어밸브 |
KR101004920B1 (ko) | 2005-12-28 | 2010-12-28 | 현대중공업 주식회사 | 건설장비의 유압 실린더 재생 장치 |
DE102006006228A1 (de) | 2006-02-09 | 2007-08-16 | Robert Bosch Gmbh | Hydraulische Steueranordnung |
DE102006012030A1 (de) * | 2006-03-14 | 2007-09-20 | Robert Bosch Gmbh | Hydraulische Ventilanordnung |
DE102006018706A1 (de) * | 2006-04-21 | 2007-10-25 | Robert Bosch Gmbh | Hydraulische Steueranordnung |
DE102007029358A1 (de) | 2007-06-26 | 2009-01-02 | Robert Bosch Gmbh | Verfahren und hydraulische Steueranordnung zur Druckmittelversorgung zumindest eines hydraulischen Verbrauchers |
DE102007029355A1 (de) * | 2007-06-26 | 2009-01-02 | Robert Bosch Gmbh | Hydraulische Steueranordnung |
KR100929421B1 (ko) * | 2007-10-22 | 2009-12-03 | 볼보 컨스트럭션 이키프먼트 홀딩 스웨덴 에이비 | 중장비용 유압제어밸브 |
DE102008008092A1 (de) * | 2007-11-28 | 2009-06-04 | Robert Bosch Gmbh | Ventilanordnung |
US7913491B2 (en) * | 2007-11-30 | 2011-03-29 | Caterpillar Inc. | Hydraulic flow control system and method |
DE102008018936A1 (de) * | 2008-04-15 | 2009-10-22 | Robert Bosch Gmbh | Steueranordnung zur Ansteuerung eines Wegeventils |
KR101506744B1 (ko) | 2008-12-24 | 2015-03-30 | 두산인프라코어 주식회사 | 건설기계의 재생밸브 조립체 |
DE102012001562A1 (de) * | 2012-01-27 | 2013-08-01 | Robert Bosch Gmbh | Ventilanordnung für eine mobile Arbeitsmaschine |
JP5984575B2 (ja) * | 2012-08-15 | 2016-09-06 | Kyb株式会社 | 切換弁 |
CN102864799B (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 |
CN105637153A (zh) * | 2013-08-13 | 2016-06-01 | 沃尔沃建造设备有限公司 | 用于工程机械的流量控制阀 |
US10072678B2 (en) | 2014-06-23 | 2018-09-11 | Husco International, Inc. | Regeneration deactivation valve and method |
EP3255284B1 (en) | 2015-01-08 | 2020-04-01 | Volvo Construction Equipment AB | Flow control valve for construction machine |
JP6423754B2 (ja) * | 2015-04-24 | 2018-11-14 | Kyb株式会社 | 流量制御弁 |
KR102364133B1 (ko) * | 2016-08-05 | 2022-02-18 | 나부테스코 가부시키가이샤 | 유압 제어 밸브 및 유압 제어 회로 |
WO2018098138A1 (en) | 2016-11-22 | 2018-05-31 | Parker-Hannifin Corporation | Hydraulic valve with switching regeneration circuit |
JP6914206B2 (ja) * | 2018-01-11 | 2021-08-04 | 株式会社小松製作所 | 油圧回路 |
CN111795182B (zh) * | 2020-08-06 | 2021-04-13 | 森隆流体科技(深圳)有限公司 | 一种切换油路和流量的液压阀 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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US3998134A (en) * | 1974-11-08 | 1976-12-21 | Tadeusz Budzich | Load responsive fluid control valves |
DE2908018A1 (de) * | 1979-03-01 | 1980-09-11 | Barmag Barmer Maschf | Hydraulische steuervorrichtung fuer lastunabhaengige durchflussregelung |
US4339927A (en) * | 1981-07-06 | 1982-07-20 | Oerlikon-Burhle U.S.A. Inc. | Gas-driven fluid flow control valve and cryopump incorporating the same |
US4642019A (en) * | 1984-12-19 | 1987-02-10 | General Signal Corporation | Hydraulic control system and valve therefor |
DE3606237C2 (de) * | 1986-02-26 | 1994-01-13 | Htf Hydraulik Vertriebsgesells | Doppelfahrbremsventil |
WO1994013959A1 (en) * | 1992-12-04 | 1994-06-23 | Hitachi Construction Machinery Co., Ltd. | Hydraulic regenerator |
US5615705A (en) * | 1994-10-05 | 1997-04-01 | Samsung Heavy Industries Co., Inc. | Control valve for heavy construction equipment having regeneration function |
-
1996
- 1996-05-21 KR KR1019960017288A patent/KR100208732B1/ko not_active IP Right Cessation
- 1996-12-06 DE DE19650798A patent/DE19650798B4/de not_active Expired - Fee Related
- 1996-12-10 US US08/762,989 patent/US5862831A/en not_active Expired - Fee Related
- 1996-12-11 GB GB9625702A patent/GB2313413B/en not_active Expired - Fee Related
- 1996-12-11 CN CN96120887A patent/CN1095960C/zh not_active Expired - Fee Related
- 1996-12-12 JP JP35220896A patent/JP3741502B2/ja not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR100468623B1 (ko) * | 2001-12-12 | 2005-01-27 | 한일유압 주식회사 | 암재생용 스풀을 갖는 굴삭기 컨트롤밸브의 암 재생장치 |
Also Published As
Publication number | Publication date |
---|---|
GB2313413B (en) | 2000-07-26 |
US5862831A (en) | 1999-01-26 |
JPH09302730A (ja) | 1997-11-25 |
DE19650798A1 (de) | 1997-11-27 |
CN1095960C (zh) | 2002-12-11 |
DE19650798B4 (de) | 2006-03-23 |
JP3741502B2 (ja) | 2006-02-01 |
GB9625702D0 (en) | 1997-01-29 |
KR100208732B1 (ko) | 1999-07-15 |
CN1165930A (zh) | 1997-11-26 |
GB2313413A (en) | 1997-11-26 |
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