IT1163241B - ELECTROHYDRAULIC CONTROL SYSTEM FOR HYDRAULIC DRIVE MACHINES - Google Patents
ELECTROHYDRAULIC CONTROL SYSTEM FOR HYDRAULIC DRIVE MACHINESInfo
- Publication number
- IT1163241B IT1163241B IT20488/83A IT2048883A IT1163241B IT 1163241 B IT1163241 B IT 1163241B IT 20488/83 A IT20488/83 A IT 20488/83A IT 2048883 A IT2048883 A IT 2048883A IT 1163241 B IT1163241 B IT 1163241B
- Authority
- IT
- Italy
- Prior art keywords
- control system
- hydraulic drive
- electrohydraulic control
- drive machines
- machines
- Prior art date
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
- F15B11/042—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"
- F15B11/0426—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" by controlling the number of pumps or parallel valves switched on
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
- B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
- B66F11/044—Working platforms suspended from booms
-
- 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
- F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant 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
- F15B2211/405—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
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40576—Assemblies of multiple valves
- F15B2211/40592—Assemblies of multiple valves with multiple valves in parallel flow paths
-
- 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
- F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
-
- 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
- F15B2211/455—Control of flow in the 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
- F15B2211/47—Flow control in one direction only
- F15B2211/473—Flow control in one direction only without restriction in the reverse direction
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Servomotors (AREA)
- Flow Control (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US36661282A | 1982-04-08 | 1982-04-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
IT8320488A0 IT8320488A0 (en) | 1983-04-07 |
IT1163241B true IT1163241B (en) | 1987-04-08 |
Family
ID=23443748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT20488/83A IT1163241B (en) | 1982-04-08 | 1983-04-07 | ELECTROHYDRAULIC CONTROL SYSTEM FOR HYDRAULIC DRIVE MACHINES |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS58187602A (en) |
AU (1) | AU1053383A (en) |
BE (1) | BE895896A (en) |
BR (1) | BR8300653A (en) |
DE (1) | DE3307267A1 (en) |
FR (1) | FR2524945A1 (en) |
GB (1) | GB2119190A (en) |
IT (1) | IT1163241B (en) |
NL (1) | NL8300552A (en) |
SE (1) | SE8301900L (en) |
ZA (1) | ZA83704B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102009026606A1 (en) * | 2009-05-29 | 2010-12-02 | Metso Paper, Inc. | Digital hydraulic controller |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3038449A (en) * | 1959-06-03 | 1962-06-12 | Gen Dynamics Corp | Hydraulic control system |
DE2011713A1 (en) * | 1970-03-12 | 1971-09-30 | Bosch Gmbh Robert | ADJUSTMENT DEVICE FOR A HYDRAULIC PISTON WITH PULSE LENGTH MODULATED CONTROL SIGNALS |
-
1983
- 1983-01-18 AU AU10533/83A patent/AU1053383A/en not_active Abandoned
- 1983-02-01 GB GB08302732A patent/GB2119190A/en not_active Withdrawn
- 1983-02-02 ZA ZA83704A patent/ZA83704B/en unknown
- 1983-02-08 BR BR8300653A patent/BR8300653A/en unknown
- 1983-02-14 NL NL8300552A patent/NL8300552A/en not_active Application Discontinuation
- 1983-02-14 BE BE2/60029A patent/BE895896A/en not_active IP Right Cessation
- 1983-03-02 DE DE19833307267 patent/DE3307267A1/en not_active Withdrawn
- 1983-04-06 FR FR8305608A patent/FR2524945A1/en not_active Withdrawn
- 1983-04-07 SE SE8301900A patent/SE8301900L/en not_active Application Discontinuation
- 1983-04-07 IT IT20488/83A patent/IT1163241B/en active
- 1983-04-08 JP JP58062885A patent/JPS58187602A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
ZA83704B (en) | 1983-10-26 |
JPS58187602A (en) | 1983-11-01 |
NL8300552A (en) | 1983-11-01 |
SE8301900L (en) | 1983-10-09 |
GB2119190A (en) | 1983-11-09 |
DE3307267A1 (en) | 1983-10-13 |
IT8320488A0 (en) | 1983-04-07 |
BR8300653A (en) | 1983-12-13 |
AU1053383A (en) | 1983-10-13 |
GB8302732D0 (en) | 1983-03-02 |
SE8301900D0 (en) | 1983-04-07 |
FR2524945A1 (en) | 1983-10-14 |
BE895896A (en) | 1983-05-30 |
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