ES2154110A1 - Sistema hidraulico. - Google Patents
Sistema hidraulico.Info
- Publication number
- ES2154110A1 ES2154110A1 ES009701963A ES9701963A ES2154110A1 ES 2154110 A1 ES2154110 A1 ES 2154110A1 ES 009701963 A ES009701963 A ES 009701963A ES 9701963 A ES9701963 A ES 9701963A ES 2154110 A1 ES2154110 A1 ES 2154110A1
- Authority
- ES
- Spain
- Prior art keywords
- pressure
- neutral position
- sensing signal
- load sensing
- control valve
- 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
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
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
-
- 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
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
- E02F9/2207—Arrangements for controlling the attitude of actuators, e.g. speed, floating function for reducing or compensating oscillations
-
- 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
-
- 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20538—Type of pump constant capacity
-
- 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
- F15B2211/3144—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
- F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
- F15B2211/31529—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member 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
- F15B2211/315—Directional control characterised by the connections of the valve or valves in the circuit
- F15B2211/31523—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member
- F15B2211/31541—Directional control characterised by the connections of the valve or valves in the circuit being connected to a pressure source and an output member having a single pressure source and multiple output members
-
- 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
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the 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
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back 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
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
- F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves
- F15B2211/5059—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance valves using double counterbalance 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
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5153—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a directional control valve
- F15B2211/5154—Pressure control characterised by the connections of the pressure control means in the circuit being connected to an output member and a directional control valve being connected to multiple ports of an 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
- F15B2211/50—Pressure control
- F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
- F15B2211/5156—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a return line and a 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
- F15B2211/50—Pressure control
- F15B2211/52—Pressure control characterised by the type of actuation
- F15B2211/528—Pressure 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
- F15B2211/50—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
- F15B2211/50—Pressure control
- F15B2211/575—Pilot pressure control
- F15B2211/5756—Pilot pressure control for opening a 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/71—Multiple output members, e.g. multiple hydraulic motors or cylinders
-
- 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/8609—Control during or prevention of abnormal conditions the abnormal condition being cavitation
-
- 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/8613—Control during or prevention of abnormal conditions the abnormal condition being oscillations
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
Sistema hidráulico (1) con una fuente de presión (2, 3) controlable mediante una señal de detección de carga, un sumidero de presión (4), al menos dos secciones de trabajo (6, 7), cada una de las cuales tiene un consumidor hidráulico (8, 18) y una válvula de control (9, 9'') con una conexión (19, 20; 19'', 20'') de la señal de detección de carga, y al menos una válvula de contrapresión (17) dispuesta en un tubo del depósito entre la válvula de control (9, 9'') y el sumidero de presión (4). En este sistema, la presión requerida de la bomba en la posición neutra debe ser lo más baja posible. Por otra parte, no deben ocurrir oscilaciones si una fuerza externa actúa sobre otro consumidor hidráulico en la posición neutra de una válvula de control. En esta posición neutra (9, 9''), la conexión (19, 20; 19'', 20'') de la señal de detección de carga está conectada con el sumidero de presión (4) mediante un tubo auxiliar (23, 23'', 23''''; 29) del depósito que pone derivación la válvula de contrapresión (17).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19640100A DE19640100B4 (de) | 1996-09-28 | 1996-09-28 | Hydraulisches System |
Publications (2)
Publication Number | Publication Date |
---|---|
ES2154110A1 true ES2154110A1 (es) | 2001-03-16 |
ES2154110B1 ES2154110B1 (es) | 2001-10-16 |
Family
ID=7807295
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES009701963A Expired - Lifetime ES2154110B1 (es) | 1996-09-28 | 1997-09-18 | Sistema hidraulico. |
Country Status (18)
Country | Link |
---|---|
US (1) | US5857331A (es) |
AT (1) | AT406408B (es) |
BE (1) | BE1011374A3 (es) |
BR (1) | BR9704909A (es) |
CA (1) | CA2214209C (es) |
DE (1) | DE19640100B4 (es) |
DK (1) | DK110397A (es) |
ES (1) | ES2154110B1 (es) |
FI (1) | FI973798A (es) |
FR (1) | FR2754020B1 (es) |
GB (1) | GB2317651B (es) |
IE (1) | IE80721B1 (es) |
IT (1) | IT1294893B1 (es) |
NL (1) | NL1007143C2 (es) |
NO (1) | NO974433L (es) |
PT (1) | PT102053B (es) |
SE (1) | SE9703279L (es) |
TR (1) | TR199701049A2 (es) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6029445A (en) * | 1999-01-20 | 2000-02-29 | Case Corporation | Variable flow hydraulic system |
EP1039255B1 (de) | 1999-03-19 | 2003-08-27 | Alstom | Dampfkraftwerk |
DE19924473A1 (de) | 1999-05-28 | 2000-11-30 | Mannesmann Rexroth Ag | Hydraulischer Antrieb mit mehreren auch einen Differentialzylinder umfassenden hydraulischen Verbrauchern, insbesondere an einer Kunststoffspritzgießmaschine |
GB2352275B (en) * | 1999-07-17 | 2004-02-18 | Agco Gmbh & Co | Hydraulic system for utility vehicles |
EP1170510B1 (de) * | 2000-07-08 | 2005-08-17 | Bosch Rexroth AG | Hydraulische Steueranordnung zur Druckmittelversorgung von vorzugsweise mehreren hydraulischen Verbrauchern |
CN103807243B (zh) * | 2014-01-21 | 2017-01-04 | 广西柳工机械股份有限公司 | 工程机械用电比例减压缓冲阀 |
CN104481944B (zh) * | 2014-10-23 | 2016-08-24 | 三一汽车起重机械有限公司 | 降压系统及工程机械 |
CN110374945B (zh) * | 2019-07-24 | 2020-07-28 | 潍柴动力股份有限公司 | 一种负载敏感阀组件及负载敏感系统 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2283342A1 (fr) * | 1974-08-30 | 1976-03-26 | Nisshin Sangyo Co | Dispositif de commande hydraulique multiple a compensation de pression avec distributeurs alimentes en parallele par une pompe a debit constant |
US4977928A (en) * | 1990-05-07 | 1990-12-18 | Caterpillar Inc. | Load sensing hydraulic system |
US5077972A (en) * | 1990-07-03 | 1992-01-07 | Caterpillar Inc. | Load pressure duplicating circuit |
US5138837A (en) * | 1990-02-26 | 1992-08-18 | Mannesmann Rexroth Gmbh | Load independent valve control for a plurality of hydraulic users |
US5323687A (en) * | 1991-10-28 | 1994-06-28 | Danfors A/S | Hydraulic circuit |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE371259B (es) * | 1972-10-05 | 1974-11-11 | Tico Ab | |
DE2457451A1 (de) * | 1974-12-05 | 1976-06-10 | Bosch Gmbh Robert | Hydraulische steuereinrichtung |
US4179981A (en) * | 1975-10-30 | 1979-12-25 | Poclain | Device for sequentially supplying several hydraulic motors |
US3982469A (en) * | 1976-01-23 | 1976-09-28 | Caterpillar Tractor Co. | Apparatus for controlling work element operating pressures in a fluid system |
JPS5635806A (en) * | 1979-09-01 | 1981-04-08 | Sanyo Kiki Kk | Compound oil pressure circuit |
KR920006546B1 (ko) * | 1988-03-23 | 1992-08-08 | 히다찌 겐끼 가부시기가이샤 | 유압구동장치 |
DE4036720C2 (de) * | 1990-11-17 | 2001-09-13 | Linde Ag | Steuerschaltung für die lastunabhängige Aufteilung eines Druckmittelstromes |
KR970011608B1 (ko) * | 1994-09-06 | 1997-07-12 | 대우중공업 주식회사 | 건설기계의 선회토르크 제어장치(an apparatus for controlling turning torque in a construction equipment) |
-
1996
- 1996-09-28 DE DE19640100A patent/DE19640100B4/de not_active Expired - Fee Related
-
1997
- 1997-08-28 CA CA002214209A patent/CA2214209C/en not_active Expired - Fee Related
- 1997-08-29 IE IE970649A patent/IE80721B1/en not_active IP Right Cessation
- 1997-09-10 SE SE9703279A patent/SE9703279L/xx not_active Application Discontinuation
- 1997-09-11 AT AT0153597A patent/AT406408B/de not_active IP Right Cessation
- 1997-09-18 GB GB9719910A patent/GB2317651B/en not_active Expired - Fee Related
- 1997-09-18 ES ES009701963A patent/ES2154110B1/es not_active Expired - Lifetime
- 1997-09-18 US US08/933,438 patent/US5857331A/en not_active Expired - Fee Related
- 1997-09-23 TR TR97/01049A patent/TR199701049A2/xx unknown
- 1997-09-24 FR FR9711885A patent/FR2754020B1/fr not_active Expired - Fee Related
- 1997-09-24 PT PT102053A patent/PT102053B/pt not_active IP Right Cessation
- 1997-09-25 NO NO974433A patent/NO974433L/no not_active Application Discontinuation
- 1997-09-25 IT IT97TO000846A patent/IT1294893B1/it active IP Right Grant
- 1997-09-25 BE BE9700778A patent/BE1011374A3/fr not_active IP Right Cessation
- 1997-09-25 DK DK110397A patent/DK110397A/da not_active Application Discontinuation
- 1997-09-26 NL NL1007143A patent/NL1007143C2/nl not_active IP Right Cessation
- 1997-09-26 FI FI973798A patent/FI973798A/fi unknown
- 1997-09-29 BR BR9704909A patent/BR9704909A/pt not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2283342A1 (fr) * | 1974-08-30 | 1976-03-26 | Nisshin Sangyo Co | Dispositif de commande hydraulique multiple a compensation de pression avec distributeurs alimentes en parallele par une pompe a debit constant |
US5138837A (en) * | 1990-02-26 | 1992-08-18 | Mannesmann Rexroth Gmbh | Load independent valve control for a plurality of hydraulic users |
US4977928A (en) * | 1990-05-07 | 1990-12-18 | Caterpillar Inc. | Load sensing hydraulic system |
US5077972A (en) * | 1990-07-03 | 1992-01-07 | Caterpillar Inc. | Load pressure duplicating circuit |
US5323687A (en) * | 1991-10-28 | 1994-06-28 | Danfors A/S | Hydraulic circuit |
Also Published As
Publication number | Publication date |
---|---|
GB2317651A (en) | 1998-04-01 |
FI973798A (fi) | 1998-03-29 |
MX9707286A (es) | 1998-08-30 |
CA2214209C (en) | 2000-11-21 |
FI973798A0 (fi) | 1997-09-26 |
NO974433D0 (no) | 1997-09-25 |
ITTO970846A1 (it) | 1999-03-25 |
ATA153597A (de) | 1999-09-15 |
BR9704909A (pt) | 1998-11-10 |
NO974433L (no) | 1998-03-30 |
GB9719910D0 (en) | 1997-11-19 |
DK110397A (da) | 1998-03-29 |
CA2214209A1 (en) | 1998-03-28 |
AT406408B (de) | 2000-05-25 |
GB2317651B (en) | 2000-03-29 |
DE19640100B4 (de) | 2005-07-14 |
US5857331A (en) | 1999-01-12 |
IE80721B1 (en) | 1998-12-30 |
FR2754020B1 (fr) | 1999-04-30 |
PT102053A (pt) | 1998-05-29 |
PT102053B (pt) | 1999-11-30 |
DE19640100A1 (de) | 1998-04-09 |
NL1007143A1 (nl) | 1998-03-31 |
ES2154110B1 (es) | 2001-10-16 |
IE970649A1 (en) | 1998-04-08 |
FR2754020A1 (fr) | 1998-04-03 |
TR199701049A2 (xx) | 1998-04-21 |
BE1011374A3 (fr) | 1999-08-03 |
SE9703279D0 (sv) | 1997-09-10 |
SE9703279L (sv) | 1998-03-29 |
IT1294893B1 (it) | 1999-04-23 |
NL1007143C2 (nl) | 1998-08-18 |
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