JPS4957275A - - Google Patents

Info

Publication number
JPS4957275A
JPS4957275A JP48078547A JP7854773A JPS4957275A JP S4957275 A JPS4957275 A JP S4957275A JP 48078547 A JP48078547 A JP 48078547A JP 7854773 A JP7854773 A JP 7854773A JP S4957275 A JPS4957275 A JP S4957275A
Authority
JP
Japan
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.)
Pending
Application number
JP48078547A
Other languages
Japanese (ja)
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 filed Critical
Publication of JPS4957275A publication Critical patent/JPS4957275A/ja
Pending legal-status Critical Current

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
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/27—Directional control by means of the pressure source
    • 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
    • F15B2211/31—Directional control characterised by the positions of the valve element
    • F15B2211/3105—Neutral or centre positions
    • F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed 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
    • F15B2211/30—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
    • F15B2211/60—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
    • 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
    • F15B2211/88—Control measures for saving energy

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
JP48078547A 1972-07-13 1973-07-13 Pending JPS4957275A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27130372A 1972-07-13 1972-07-13

Publications (1)

Publication Number Publication Date
JPS4957275A true JPS4957275A (fr) 1974-06-04

Family

ID=23035011

Family Applications (1)

Application Number Title Priority Date Filing Date
JP48078547A Pending JPS4957275A (fr) 1972-07-13 1973-07-13

Country Status (11)

Country Link
US (1) US3788077A (fr)
JP (1) JPS4957275A (fr)
AU (1) AU5789773A (fr)
BE (1) BE802105A (fr)
BR (1) BR7305249D0 (fr)
CA (1) CA988812A (fr)
DE (1) DE2335703A1 (fr)
FR (1) FR2193153B1 (fr)
IT (1) IT991259B (fr)
NL (1) NL7309725A (fr)
ZA (1) ZA734473B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5133201U (fr) * 1974-09-03 1976-03-11
JPS62191682A (ja) * 1986-02-17 1987-08-22 Kawasaki Heavy Ind Ltd 可変容量形ポンプの流量制御回路
JPH01118201U (fr) * 1988-02-05 1989-08-10

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4178962A (en) * 1972-10-30 1979-12-18 Tomco, Inc. Control valve with flow control means
US4197705A (en) * 1978-05-30 1980-04-15 General Signal Corporation Hydraulic control system
JPS636474Y2 (fr) * 1980-07-28 1988-02-23
US4408453A (en) * 1981-01-16 1983-10-11 General Signal Corporation Hydraulic control system
DE3109045A1 (de) * 1981-03-10 1982-09-16 Alfred Teves Gmbh, 6000 Frankfurt Regelbare hydraulikpumpe
JPH0643523Y2 (ja) * 1987-10-14 1994-11-14 カヤバ工業株式会社 建設機械用制御弁
US5265422A (en) * 1992-05-15 1993-11-30 Sauer Inc. Pilot-operated pressure override valve
FR2693241B1 (fr) * 1992-07-03 1994-09-30 Rexroth Sigma Circuit hydraulique de commande en pression d'un distributeur hydraulique du type à centre ouvert.
FR2827952A1 (fr) * 2001-07-27 2003-01-31 Osmos Sa Dispositif de mesure d'un deplacement et procede associe
US20060242955A1 (en) * 2005-04-19 2006-11-02 Clark Equipment Company Hydraulic system with piston pump and open center valve
US9347200B2 (en) 2012-06-04 2016-05-24 Cnh Industrial America Llc Fluid control system for work vehicle
JP5758348B2 (ja) * 2012-06-15 2015-08-05 住友建機株式会社 建設機械の油圧回路
US9334629B2 (en) 2013-03-15 2016-05-10 Deere And Company Open-center hydraulic system with machine information-based flow control

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2238060A (en) * 1938-02-08 1941-04-15 Manly Corp Fluid pressure feed and rapid traverse system of transmission of power
US3250227A (en) * 1963-08-09 1966-05-10 American Brake Shoe Co Torque control apparatus for hydraulic power units
GB1126873A (en) * 1964-09-22 1968-09-11 Sperry Rand Corp Improvements in hydraulic supply and control systems
US3366064A (en) * 1965-03-10 1968-01-30 Borg Warner Control for hydraulic apparatus
US3444689A (en) * 1967-02-02 1969-05-20 Weatherhead Co Differential pressure compensator control
GB1262488A (en) * 1968-06-04 1972-02-02 Dowty Technical Dev Ltd Hydraulic apparatus for including variable-delivery pumps

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5133201U (fr) * 1974-09-03 1976-03-11
JPS62191682A (ja) * 1986-02-17 1987-08-22 Kawasaki Heavy Ind Ltd 可変容量形ポンプの流量制御回路
JPH01118201U (fr) * 1988-02-05 1989-08-10

Also Published As

Publication number Publication date
ZA734473B (en) 1975-01-29
FR2193153A1 (fr) 1974-02-15
BE802105A (fr) 1973-11-05
AU5789773A (en) 1975-01-09
BR7305249D0 (pt) 1974-08-15
IT991259B (it) 1975-07-30
CA988812A (en) 1976-05-11
DE2335703A1 (de) 1974-01-24
NL7309725A (fr) 1974-01-15
US3788077A (en) 1974-01-29
FR2193153B1 (fr) 1976-06-18

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