GB1521732A - Hydraulic power systems - Google Patents

Hydraulic power systems

Info

Publication number
GB1521732A
GB1521732A GB30995/75A GB3099575A GB1521732A GB 1521732 A GB1521732 A GB 1521732A GB 30995/75 A GB30995/75 A GB 30995/75A GB 3099575 A GB3099575 A GB 3099575A GB 1521732 A GB1521732 A GB 1521732A
Authority
GB
United Kingdom
Prior art keywords
spool
secondary circuit
spool valve
line
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.)
Expired
Application number
GB30995/75A
Other languages
English (en)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Navistar Inc
Original Assignee
International Harverster Corp
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 International Harverster Corp filed Critical International Harverster Corp
Priority to FR7528783A priority Critical patent/FR2303525A1/fr
Publication of GB1521732A publication Critical patent/GB1521732A/en
Expired 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
    • F15B11/16—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
    • F15B2211/40—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
    • F15B2211/40523—Flow control characterised by the type of flow control means or valve with flow dividers
    • F15B2211/4053—Flow control characterised by the type of flow control means or valve with flow dividers using 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
    • F15B2211/40—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
    • F15B2211/455—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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/65—Methods of control of the load sensing 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
    • F15B2211/70—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
    • 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
    • F15B2211/78—Control of multiple output members
    • F15B2211/781—Control of multiple output members one or more output members having priority

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Power Steering Mechanism (AREA)
GB30995/75A 1974-07-24 1975-07-24 Hydraulic power systems Expired GB1521732A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7528783A FR2303525A1 (fr) 1975-03-13 1975-09-19 Procede et dispositif pour arreter la croissance des poils sur une partie de la peau d'un animal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2435602A DE2435602C3 (de) 1974-07-24 1974-07-24 Selbsttätige Steuereinrichtung zur Verteilung des Druckmittels auf zwei Hydrauliksysteme

Publications (1)

Publication Number Publication Date
GB1521732A true GB1521732A (en) 1978-08-16

Family

ID=5921405

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30995/75A Expired GB1521732A (en) 1974-07-24 1975-07-24 Hydraulic power systems

Country Status (5)

Country Link
US (1) US3994133A (enExample)
CA (1) CA1034019A (enExample)
DE (1) DE2435602C3 (enExample)
FR (1) FR2280130A1 (enExample)
GB (1) GB1521732A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159779A (en) * 1984-06-07 1985-12-11 Eaton Corp Priority flow system for vehicle power steering

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2625101C2 (de) * 1976-06-04 1985-11-14 Robert Bosch Gmbh, 7000 Stuttgart Hydraulische Steuereinrichtung zur volumenstromabhängigen Verteilung von Druckflüssigkeit auf zwei Systeme
US4044786A (en) * 1976-07-26 1977-08-30 Eaton Corporation Load sensing steering system with dual power source
DE2757840C2 (de) * 1977-12-23 1983-01-27 International Harvester Company Mbh, 4040 Neuss Hydraulische Steuervorrichtung für zwei getrennte Hydraulikkreise, deren einer zumindest einen bevorzugten Verbraucher und deren anderer zumindest einen nachrangigen Verbraucher aufweist.
DE2808196A1 (de) * 1978-02-25 1979-09-06 Bosch Gmbh Robert Hydraulische steuereinrichtung
DE3016943A1 (de) * 1980-05-02 1981-11-05 Robert Bosch Gmbh, 7000 Stuttgart Hydraulische anlage mit zwei pumpen
US4335577A (en) * 1980-06-19 1982-06-22 Deere & Company Hydraulic system having variable displacement pumps controlled by power beyond flow
US4453451A (en) * 1980-11-10 1984-06-12 Fiatallis North America, Inc. Hydraulic steering system with automatic emergency pump flow control
US4427121A (en) 1982-05-03 1984-01-24 Clements Shannon K Hydraulic valve control for aerial book devices
US4819430A (en) * 1983-01-21 1989-04-11 Hydreco, Inc. Variably charged hydraulic circuit
DE3319408A1 (de) * 1983-05-28 1984-11-29 Robert Bosch Gmbh, 7000 Stuttgart Servolenkungseinrichtung mit mindestens einem daran angeschlossenen hydraulischen zusatzverbraucher
DE3321484A1 (de) * 1983-06-14 1984-12-20 Linde Ag, 6200 Wiesbaden Hydraulische anlage mit zwei verbrauchern hydraulischer energie
US4706456A (en) * 1984-09-04 1987-11-17 South Bend Lathe, Inc. Method and apparatus for controlling hydraulic systems
US4653271A (en) * 1984-09-27 1987-03-31 Armco Inc. Boom crane centering
US4782662A (en) * 1984-09-27 1988-11-08 National-Oilwell Boom crane centering
DK154169C (da) * 1984-10-03 1989-03-20 Danfoss As Styreindretning for en hydraulisk drevet forbruger
DE3513967A1 (de) * 1985-04-18 1986-10-23 Mannesmann Rexroth GmbH, 8770 Lohr Sicherheitsanordnung fuer vorrangige hydraulische verbraucher
DE3513966A1 (de) * 1985-04-18 1986-10-23 Mannesmann Rexroth GmbH, 8770 Lohr Sicherheitsanordnung fuer vorrangige hydraulische verbraucher
DE3608469A1 (de) * 1986-03-14 1987-10-01 Bosch Gmbh Robert Hydraulikanlage
JPH07116721B2 (ja) * 1989-01-31 1995-12-13 油谷重工株式会社 油圧ショベルの油圧回路
AU631727B2 (en) * 1990-03-09 1992-12-03 Kubota Corporation Hydraulic circuit for a working vehicle having a plurality of hydraulic actuators
DE4137963C2 (de) * 1991-10-30 1995-03-23 Rexroth Mannesmann Gmbh Ventilanordnung zur lastunabhängigen Steuerung mehrerer hydraulischer Verbraucher
US5413452A (en) * 1993-03-29 1995-05-09 Case Corporation Hydraulic system for a backhoe apparatus
US5768973A (en) * 1996-12-27 1998-06-23 Cochran; Gary Hydraulic line and valve assembly for construction vehicle auxiliary implements
US5826487A (en) * 1997-02-20 1998-10-27 Caterpillar Inc. Pressure control for a pair of parallel hydraulic circuits
US5918558A (en) * 1997-12-01 1999-07-06 Case Corporation Dual-pump, flow-isolated hydraulic circuit for an agricultural tractor
JP2000087904A (ja) * 1998-09-14 2000-03-28 Komatsu Ltd 圧油供給装置
US6205781B1 (en) * 1999-02-25 2001-03-27 Caterpillar Inc. Fluid control system including a work element and a valve arrangement for selectively supplying pressurized fluid thereto from two pressurized fluid sources
JP4209705B2 (ja) * 2003-03-17 2009-01-14 日立建機株式会社 作業機の油圧回路
US7600612B2 (en) * 2005-04-14 2009-10-13 Nmhg Oregon, Llc Hydraulic system for an industrial vehicle
US8756930B2 (en) 2010-05-28 2014-06-24 Caterpillar Inc. Hydraulic system having implement and steering flow sharing
CN103016457B (zh) * 2012-12-05 2015-08-26 中联重科股份有限公司 液压泵控制系统、车辆及其转向液压系统
DE102017005479A1 (de) * 2017-06-08 2018-12-13 Hydac Systems & Services Gmbh Druckversorgungsvorrichtung
DE102019109773A1 (de) 2019-04-12 2020-10-15 Wirtgen Gmbh Baumaschine und Verfahren zum Steuern einer Baumaschine
JP7389635B2 (ja) * 2019-12-05 2023-11-30 カヤバ株式会社 作動流体供給システム

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3279558A (en) * 1962-09-17 1966-10-18 Fawick Corp Flow divider and flow-dividing hydraulic system
US3355994A (en) * 1966-01-13 1967-12-05 New York Air Brake Co Hydraulic system
US3535877A (en) * 1969-05-09 1970-10-27 Gen Signal Corp Three-pump hydraulic system incorporating an unloader

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2159779A (en) * 1984-06-07 1985-12-11 Eaton Corp Priority flow system for vehicle power steering

Also Published As

Publication number Publication date
DE2435602B2 (de) 1979-10-04
DE2435602C3 (de) 1980-06-12
DE2435602A1 (de) 1976-02-12
FR2280130A1 (fr) 1976-02-20
US3994133A (en) 1976-11-30
CA1034019A (en) 1978-07-04
FR2280130B1 (enExample) 1981-10-09

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee