FR2452618A1 - HYDRAULIC CIRCUIT FOR CONTROLLING AN ACTUATING DEVICE - Google Patents
HYDRAULIC CIRCUIT FOR CONTROLLING AN ACTUATING DEVICEInfo
- Publication number
- FR2452618A1 FR2452618A1 FR8006633A FR8006633A FR2452618A1 FR 2452618 A1 FR2452618 A1 FR 2452618A1 FR 8006633 A FR8006633 A FR 8006633A FR 8006633 A FR8006633 A FR 8006633A FR 2452618 A1 FR2452618 A1 FR 2452618A1
- Authority
- FR
- France
- Prior art keywords
- distributor
- hydraulic circuit
- valves
- controlling
- actuating device
- 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
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/42—Control of exclusively fluid gearing hydrostatic involving adjustment of a pump or motor with adjustable output or capacity
- F16H61/433—Pump capacity control by fluid pressure control means
-
- 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
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
-
- 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
- F15B11/044—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the return line, i.e. "meter out"
-
- 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
-
- 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
- F15B2211/20546—Type of pump variable capacity
- F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
-
- 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
- F15B2211/32—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
- F15B2211/351—Flow control by regulating means in feed line, i.e. meter-in 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- 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
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member 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
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow 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
- F15B2211/40—Flow control
- F15B2211/46—Control of flow in the return line, i.e. meter-out 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
- F15B2211/505—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
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
- F15B2211/5156—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
- F15B2211/555—Pressure control for assuring a minimum pressure, e.g. by using a back pressure 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
- F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/61—Secondary circuits
- F15B2211/613—Feeding 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
- 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
-
- 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
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting 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
- F15B2211/70—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)
- Fluid-Pressure Circuits (AREA)
- Valve Device For Special Equipments (AREA)
Abstract
L'INVENTION CONCERNE UN CIRCUIT HYDRAULIQUE DE COMMANDE. ELLE SE RAPPORTE A UN CIRCUIT HYDRAULIQUE AYANT UN DISTRIBUTEUR DE REGLAGE D'ENTREE 27 ET DES SOUPAPES DE REGLAGE DE SORTIE 34 ET 35. L'UNE DES ENTREES A ET B D'UN DISPOSITIF 20 DE MISE EN ACTION RECOIT LE FLUIDE SOUS PRESSION D'UNE POMPE 22 PAR L'INTERMEDIAIRE DU DISTRIBUTEUR 27 ET DE DIFFERENTS CLAPETS ET, SELON LES CONDITIONS DE FONCTIONNEMENT DU CIRCUIT, LE DEBIT ET LA VITESSE DE FONCTIONNEMENT DU DISPOSITIF 20 DE MISE EN ACTION SONT REGLES PAR LE DISTRIBUTEUR 27 OU PAR LES SOUPAPES 34, 35. APPLICATION A LA COMMANDE DES ENGINS DE TERRASSEMENT.THE INVENTION RELATES TO A HYDRAULIC CONTROL CIRCUIT. IT RELATES TO A HYDRAULIC CIRCUIT HAVING AN INPUT ADJUSTMENT DISTRIBUTOR 27 AND OUTPUT ADJUSTMENT VALVES 34 AND 35. ONE OF THE INPUTS A AND B OF A START-UP DEVICE 20 RECEIVES THE FLUID UNDER PRESSURE D '' A PUMP 22 THROUGH DISTRIBUTOR 27 AND VARIOUS VALVES AND, DEPENDING ON THE OPERATING CONDITIONS OF THE CIRCUIT, THE FLOW RATE AND OPERATING SPEED OF THE ENTRY DEVICE 20 ARE ADJUSTED BY THE DISTRIBUTOR 27 OR BY THE VALVES 34 , 35. APPLICATION TO THE CONTROL OF EARTH-MOVING EQUIPMENT.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/024,058 US4201052A (en) | 1979-03-26 | 1979-03-26 | Power transmission |
US11793680A | 1980-02-04 | 1980-02-04 |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2452618A1 true FR2452618A1 (en) | 1980-10-24 |
FR2452618B1 FR2452618B1 (en) | 1984-02-24 |
Family
ID=26697984
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8006633A Granted FR2452618A1 (en) | 1979-03-26 | 1980-03-25 | HYDRAULIC CIRCUIT FOR CONTROLLING AN ACTUATING DEVICE |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS6479405A (en) |
AU (1) | AU536970B2 (en) |
CA (1) | CA1142057A (en) |
DE (1) | DE3011088A1 (en) |
FR (1) | FR2452618A1 (en) |
GB (1) | GB2044366B (en) |
IN (1) | IN154913B (en) |
IT (2) | IT1221037B (en) |
NO (1) | NO155211C (en) |
SE (2) | SE443409B (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4345435A (en) * | 1980-05-05 | 1982-08-24 | Sperry Corporation | Power transmission |
US4353289A (en) * | 1980-05-29 | 1982-10-12 | Sperry Corporation | Power transmission |
FI72579C (en) * | 1981-11-12 | 1987-06-08 | Vickers Inc | Transmission. |
DE3347000A1 (en) * | 1983-12-24 | 1985-07-04 | Robert Bosch Gmbh, 7000 Stuttgart | Electrohydraulic arrangement for controlling a double-acting hydraulic motor |
CA1234529A (en) * | 1984-04-30 | 1988-03-29 | Vinod K. Nanda | Power transmission |
LU85774A1 (en) * | 1985-02-13 | 1985-07-24 | Hydrolux Sarl | STEUERBLOCK HYDRAULISCHER |
DE3629479A1 (en) * | 1985-09-03 | 1987-07-16 | Barmag Barmer Maschf | Directional control valve |
DE3841507C1 (en) * | 1988-01-22 | 1989-06-29 | Danfoss A/S, Nordborg, Dk | |
US5088384A (en) * | 1989-08-30 | 1992-02-18 | Vickers, Incorporated | Hydraulic actuator controlled by meter-in valves and variable pressure relief valves |
DE4342487B4 (en) * | 1993-12-13 | 2005-03-31 | Linde Ag | Hydrostatic drive system with after-suction valve |
DE10216958B8 (en) * | 2002-04-17 | 2004-07-08 | Sauer-Danfoss (Nordborg) A/S | Hydraulic control |
US20060168955A1 (en) * | 2005-02-03 | 2006-08-03 | Schlumberger Technology Corporation | Apparatus for hydraulically energizing down hole mechanical systems |
EP3064654A4 (en) * | 2013-10-31 | 2017-06-28 | Volvo Construction Equipment AB | Flow control valve for construction equipment, having floating function |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2055245A5 (en) * | 1969-07-17 | 1971-05-07 | Volkswagenwerk Ag | |
FR2191041A1 (en) * | 1972-07-05 | 1974-02-01 | Bosch Gmbh Robert | |
FR2344733A1 (en) * | 1976-03-15 | 1977-10-14 | Caterpillar Tractor Co | HYDRAULIC INSTALLATION, ESPECIALLY FOR WORK OR UTILITY VEHICLES |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USRE26028E (en) * | 1963-05-16 | 1966-05-17 | Pilot operated control valve mechanism | |
US3411536A (en) * | 1966-07-06 | 1968-11-19 | Koehring Co | Pilot operated control valve mechanism |
GB1302741A (en) * | 1969-04-07 | 1973-01-10 | ||
CH563532A5 (en) * | 1973-03-14 | 1975-06-30 | Buehler Ag Geb | |
SE387415B (en) * | 1974-03-22 | 1976-09-06 | Tedeco Ag | FLUID VALVE DEVICE |
DE2500096C3 (en) * | 1975-01-03 | 1984-08-02 | Sauer Getriebe KG, 2350 Neumünster | Hydraulic circuit device for pressure medium path control with constant control of the pressure medium flow for a double-acting hydraulic motor |
JPS5482574A (en) * | 1977-12-13 | 1979-06-30 | Kobe Steel Ltd | Control circuit of actuator |
-
1980
- 1980-03-22 DE DE19803011088 patent/DE3011088A1/en not_active Withdrawn
- 1980-03-24 IT IT48246/80A patent/IT1221037B/en active
- 1980-03-25 AU AU56824/80A patent/AU536970B2/en not_active Ceased
- 1980-03-25 GB GB8009963A patent/GB2044366B/en not_active Expired
- 1980-03-25 NO NO800846A patent/NO155211C/en unknown
- 1980-03-25 CA CA000348366A patent/CA1142057A/en not_active Expired
- 1980-03-25 FR FR8006633A patent/FR2452618A1/en active Granted
- 1980-03-25 SE SE8002302A patent/SE443409B/en not_active IP Right Cessation
- 1980-09-02 IN IN1004/CAL/80A patent/IN154913B/en unknown
-
1985
- 1985-07-23 SE SE8503569A patent/SE455637B/en not_active IP Right Cessation
-
1988
- 1988-09-06 JP JP63223358A patent/JPS6479405A/en active Pending
-
1989
- 1989-07-18 IT IT8948200A patent/IT1232358B/en active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2055245A5 (en) * | 1969-07-17 | 1971-05-07 | Volkswagenwerk Ag | |
FR2191041A1 (en) * | 1972-07-05 | 1974-02-01 | Bosch Gmbh Robert | |
FR2344733A1 (en) * | 1976-03-15 | 1977-10-14 | Caterpillar Tractor Co | HYDRAULIC INSTALLATION, ESPECIALLY FOR WORK OR UTILITY VEHICLES |
Non-Patent Citations (1)
Title |
---|
PROCEEDINGS OF THE NATIONAL CONFERENCE ON FLUID POWER, 33 ANNUAL MEETING, CHICAGO, 25-27 octobre 1977, vol.31, 1978, (US) * |
Also Published As
Publication number | Publication date |
---|---|
AU536970B2 (en) | 1984-05-31 |
NO155211B (en) | 1986-11-17 |
IN154913B (en) | 1984-12-22 |
JPS6479405A (en) | 1989-03-24 |
NO155211C (en) | 1987-02-25 |
IT1221037B (en) | 1990-06-21 |
SE8503569L (en) | 1985-07-23 |
IT8048246A0 (en) | 1980-03-24 |
SE455637B (en) | 1988-07-25 |
GB2044366A (en) | 1980-10-15 |
DE3011088A1 (en) | 1980-10-09 |
SE443409B (en) | 1986-02-24 |
FR2452618B1 (en) | 1984-02-24 |
SE8002302L (en) | 1980-09-27 |
IT8948200A0 (en) | 1989-07-18 |
NO800846L (en) | 1980-09-29 |
IT1232358B (en) | 1992-01-28 |
SE8503569D0 (en) | 1985-07-23 |
GB2044366B (en) | 1983-08-03 |
AU5682480A (en) | 1980-10-02 |
CA1142057A (en) | 1983-03-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2452618A1 (en) | HYDRAULIC CIRCUIT FOR CONTROLLING AN ACTUATING DEVICE | |
DK241383A (en) | HYDRAULIC VALVE DEVICE | |
DE3266453D1 (en) | Back flow preventer for hydraulic conduits | |
DE69318984D1 (en) | HYDRAULIC SYSTEM | |
FR2456968A1 (en) | BOILER TANK WATER LEVEL CONTROL SYSTEM | |
GB1560242A (en) | Apparatus for controlling the speed of an hydraulic motor | |
FR2445177A1 (en) | IMPROVEMENTS ON CONTROLLED FLOW SPREADING DEVICES | |
SE8106632L (en) | HYDRAULIC CONTROL SYSTEM | |
EP0477370A4 (en) | Valve device and hydraulic driving device | |
EP0056514A3 (en) | Hydraulic control system | |
FR2388149A1 (en) | HYDRAULIC INSTALLATION WITH SIMULTANEOUS SELECTIVE PRESSURE AND FLOW CONTROL | |
FR2456829A1 (en) | HYDRAULIC CIRCUIT FOR A LIFT DRILLING MACHINE | |
FR2412773A1 (en) | PILOT VALVE DEVICE CONTROLLED BY PRESSURIZED FLUID | |
FR2405358A1 (en) | STEAM TURBINE REGULATION SYSTEM | |
FR2375467A1 (en) | HYDRAULIC CONTROL PROCESS AND DEVICE | |
FR2419419A1 (en) | CONTROL UNIT FOR A HYDRAULIC MANEUVERING DEVICE, ESPECIALLY FOR A HYDRAULIC LIFT OF AN AGRICULTURAL INSTRUMENT | |
FR2401343A1 (en) | HYDRAULIC CONTROL DEVICE OF A SERVO-MOTOR, ESPECIALLY FOR VEHICLE STEERING | |
FR2367957A1 (en) | HYDRAULIC CONTROL SYSTEM | |
FR2451527A1 (en) | CONTROL VALVE FOR A PRESSURE FLUID SYSTEM | |
US4620417A (en) | Control device for a hydrostatic gear driven by a drive engine | |
DE3277448D1 (en) | Method and control device for a hydraulic hammer | |
SE8505591D0 (en) | CONTROL DEVICES FOR TWO, VALIDING THROUGH A PIPE CONTROL BY A HIGH PRESSURE PUMP SUPPLYED, HYDRAULIC CONTROL DEVICES | |
FR2394697A1 (en) | CONTROL CIRCUIT FOR ADJUSTING THE FLOW OF A PUMP DRIVEN BY A PRIMARY MOTOR | |
ES474117A1 (en) | Control valves for power steering | |
JPS5841521B2 (en) | pressure control valve device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |