IT977669B - CONTROL CIRCUIT FOR HYDROSTATIC WORKING MACHINES - Google Patents

CONTROL CIRCUIT FOR HYDROSTATIC WORKING MACHINES

Info

Publication number
IT977669B
IT977669B IT6713273A IT6713273A IT977669B IT 977669 B IT977669 B IT 977669B IT 6713273 A IT6713273 A IT 6713273A IT 6713273 A IT6713273 A IT 6713273A IT 977669 B IT977669 B IT 977669B
Authority
IT
Italy
Prior art keywords
control circuit
working machines
hydrostatic working
hydrostatic
machines
Prior art date
Application number
IT6713273A
Other languages
Italian (it)
Original Assignee
Weyhausen H Kg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Weyhausen H Kg filed Critical Weyhausen H Kg
Application granted granted Critical
Publication of IT977669B publication Critical patent/IT977669B/en

Links

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
    • 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
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • F15B2211/20576—Systems with pumps with multiple pumps
    • 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
    • F15B2211/3056—Assemblies of multiple valves
    • F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-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
    • F15B2211/3105—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
    • 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
    • F15B2211/7142—Multiple output members, e.g. multiple hydraulic motors or cylinders the output members being arranged in multiple groups

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)
IT6713273A 1972-01-27 1973-01-25 CONTROL CIRCUIT FOR HYDROSTATIC WORKING MACHINES IT977669B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19722203713 DE2203713A1 (en) 1972-01-27 1972-01-27 CIRCUIT FOR HYDROSTATICALLY OPERATED WORKING DEVICES

Publications (1)

Publication Number Publication Date
IT977669B true IT977669B (en) 1974-09-20

Family

ID=5834138

Family Applications (1)

Application Number Title Priority Date Filing Date
IT6713273A IT977669B (en) 1972-01-27 1973-01-25 CONTROL CIRCUIT FOR HYDROSTATIC WORKING MACHINES

Country Status (5)

Country Link
DE (1) DE2203713A1 (en)
FR (1) FR2169397B1 (en)
GB (1) GB1405724A (en)
IT (1) IT977669B (en)
SE (1) SE402609B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5847109Y2 (en) * 1977-10-31 1983-10-27 株式会社クボタ Circuit structure of backhoe and dozer work vehicle
JPS6129813Y2 (en) * 1980-07-07 1986-09-02
KR870000506B1 (en) * 1981-05-02 1987-03-12 니시모도 후미히라(西元文平) Hydraulic circuit system for civil engineering and architectural machinery
JPS5810960U (en) * 1981-07-10 1983-01-24 日立建機株式会社 Hydraulic excavator hydraulic circuit
IT1187892B (en) * 1986-02-04 1987-12-23 Chs Vickers Spa HYDRAULIC CONTROL CIRCUIT FOR WORKING BODIES OF EARTH-MOVING MACHINES WITH CENTRALIZED ACTUATOR BRAKING
SE524901C2 (en) * 2003-10-17 2004-10-19 Bengt Olsson Control device for e.g. servo motors, comprises directional valve connected to selector valve inlets and hydraulic fluid reservoir

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2768499A (en) * 1953-04-20 1956-10-30 John S Pilch Hydraulic system comprising multiple pump and ram units
DE1426555A1 (en) * 1964-07-27 1968-11-21 Prerovske Strojirny Np Device for controlling the hydraulic drive units of an earth moving machine, in particular an excavator
GB1145531A (en) * 1966-03-14 1969-03-19 Hydraulic Drilling Equipment L Hydraulic system

Also Published As

Publication number Publication date
SE402609B (en) 1978-07-10
GB1405724A (en) 1975-09-10
FR2169397B1 (en) 1978-08-04
DE2203713A1 (en) 1973-08-09
FR2169397A1 (en) 1973-09-07

Similar Documents

Publication Publication Date Title
BE793622A (en) SOIL WORKING MACHINE
SE406294B (en) EXTENSION MACHINE
BE794247A (en) SOIL WORKING MACHINE
IT1022980B (en) HYDROSTATIC CONTROL UNIT
IT1001023B (en) SEWING MACHINE
CH555949A (en) EARTH WORKING MACHINE.
CH553926A (en) CONTROL UNIT FOR HYDRAULIC WORK EQUIPMENT.
BE807967A (en) EARTH MOVING MACHINE
IT995697B (en) WEAVING MACHINE
BR7301576D0 (en) OPERATING MACHINE SET
IT987716B (en) JACQUARD MACHINE
IT972927B (en) WEAVING MACHINE
SE390916B (en) SCREEN MACHINE
BE798113A (en) SOIL WORKING MACHINE
FR2330277A5 (en) HYDRAULIC MACHINE
IT987714B (en) JACQUARD MACHINE
IT986981B (en) PUNCHING MACHINE
IT977669B (en) CONTROL CIRCUIT FOR HYDROSTATIC WORKING MACHINES
IT976057B (en) MACHINE FOR IRONING
AR198861A1 (en) POSITIVE DISPLACEMENT MACHINE
AT348437B (en) INDEPENDENT BAGING MACHINE
BR7306411D0 (en) HYDRAULIC MACHINE
ATA502773A (en) PROTECT FOR WALKING SHELF WEAVING MACHINES
IT978578B (en) TRIMMING MACHINE FOR FABRICS
IT981688B (en) FILM ASSEMBLY MACHINE