IT1016981B - Sistema idraulico a pressione va riabile - Google Patents

Sistema idraulico a pressione va riabile

Info

Publication number
IT1016981B
IT1016981B IT52259/74A IT5225974A IT1016981B IT 1016981 B IT1016981 B IT 1016981B IT 52259/74 A IT52259/74 A IT 52259/74A IT 5225974 A IT5225974 A IT 5225974A IT 1016981 B IT1016981 B IT 1016981B
Authority
IT
Italy
Prior art keywords
rehabilitated
hydraulic pressure
pressure system
hydraulic
pressure
Prior art date
Application number
IT52259/74A
Other languages
English (en)
Original Assignee
Deere & Co
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 Deere & Co filed Critical Deere & Co
Application granted granted Critical
Publication of IT1016981B publication Critical patent/IT1016981B/it

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
    • F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
    • F15B11/055—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive by adjusting the pump output or bypass
    • 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
    • F15B2211/25—Pressure control functions
    • F15B2211/253—Pressure margin control, e.g. pump pressure in relation to load 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
    • F15B2211/305—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
    • F15B2211/32—Directional control characterised by the type of actuation
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
    • 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
    • F15B2211/321—Directional control characterised by the type of actuation mechanically
    • F15B2211/325—Directional control characterised by the type of actuation mechanically actuated by an output member of the 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
    • F15B2211/60—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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/67—Methods for controlling pilot 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
    • F15B2211/705—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
    • F15B2211/7052—Single-acting output members
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S60/00—Power plants
    • Y10S60/911—Fluid motor system incorporating electrical system

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Fluid Gearings (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
IT52259/74A 1973-07-25 1974-07-24 Sistema idraulico a pressione va riabile IT1016981B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00382516A US3826090A (en) 1973-07-25 1973-07-25 Variable pressure hydraulic system

Publications (1)

Publication Number Publication Date
IT1016981B true IT1016981B (it) 1977-06-20

Family

ID=23509303

Family Applications (1)

Application Number Title Priority Date Filing Date
IT52259/74A IT1016981B (it) 1973-07-25 1974-07-24 Sistema idraulico a pressione va riabile

Country Status (11)

Country Link
US (1) US3826090A (it)
AR (1) AR203758A1 (it)
AT (1) AT334217B (it)
AU (1) AU469509B2 (it)
CA (1) CA987201A (it)
DE (1) DE2434840A1 (it)
ES (1) ES428612A1 (it)
FR (1) FR2238852B1 (it)
GB (1) GB1474421A (it)
IT (1) IT1016981B (it)
SE (1) SE412446B (it)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4006662A (en) * 1972-11-22 1977-02-08 Danfoss A/S Hydraulic Steering apparatus
US3945175A (en) * 1973-10-02 1976-03-23 International Harvester Company Variable speed feed roll drive mechanism for forage harvesters
US3875746A (en) * 1974-04-18 1975-04-08 Amf Inc Electrical control for hydraulic waste compactor
DE2531492C2 (de) * 1975-07-15 1982-09-16 Robert Bosch Gmbh, 7000 Stuttgart Verstellbare hydrostatische Pumpe
US4004418A (en) * 1975-12-29 1977-01-25 Deere & Company Demand compensated hydraulic system with flow sensitive device
US3973399A (en) * 1975-12-29 1976-08-10 Deere & Company Demand compensated hydraulic system with pilot line dither
US3990237A (en) * 1975-12-29 1976-11-09 Deere & Company Deman compensated hydraulic system with pressure amplifier
US3995425A (en) * 1976-03-08 1976-12-07 Deere & Company Demand compensated hydraulic system with pilot line pressure-maintaining valve
DE2811585C2 (de) * 1978-03-17 1987-11-12 Mannesmann Rexroth GmbH, 8770 Lohr Hydraulische Anstellvorrichtung mit Rückführungseinrichtung
US4215543A (en) * 1979-04-09 1980-08-05 C. A. Lawton Company Method and apparatus for linear and nonlinear control of a hydraulic press
DE3109045A1 (de) * 1981-03-10 1982-09-16 Alfred Teves Gmbh, 6000 Frankfurt Regelbare hydraulikpumpe
AU552866B2 (en) * 1981-05-18 1986-06-26 Deere & Company Power-on-demand hydraulic system
AU1928283A (en) * 1982-11-26 1984-05-31 Vickers Incorporated Power transmission
IT1161583B (it) * 1983-02-25 1987-03-18 Same Spa Perfezionamenti ai circuiti idraulici di alimentazione di azionatori
SE459686B (sv) * 1986-10-13 1989-07-24 Akermans Verkstad Ab Foerfarande och anordning foer aendring av det av pumpsystemet maximalt aastadkombara hydraularbetstrycket i en graevmaskin
US4813235A (en) * 1987-06-09 1989-03-21 Deere & Company Hydraulic gain reduction circuit
DE3733677A1 (de) * 1987-10-05 1989-04-13 Rexroth Mannesmann Gmbh Lastunabhaengige steuereinrichtung fuer hydraulische verbraucher
DE3910895A1 (de) * 1987-10-05 1990-10-11 Rexroth Mannesmann Gmbh Lastunabhaengige steuereinrichtung fuer hydraulische verbraucher
JP3115887B2 (ja) * 1990-09-28 2000-12-11 株式会社小松製作所 クローズドセンタ・ロードセンシングシステムにおけるポンプの吐出容積の可変回路
EP3514394A1 (en) 2010-05-11 2019-07-24 Parker Hannifin Corp. Pressure compensated hydraulic system having differential pressure control
CN104533861B (zh) * 2014-12-05 2016-08-24 中国航空工业集团公司金城南京机电液压工程研究中心 一种用于静态测试的转换阀

Family Cites Families (4)

* 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
US3002462A (en) * 1957-08-13 1961-10-03 Racine Hydraulics & Machinery Fluid translating apparatus
US2892311A (en) * 1958-01-08 1959-06-30 Deere & Co Hydraulic apparatus
US2892312A (en) * 1958-01-27 1959-06-30 Deere & Co Demand compensated hydraulic system

Also Published As

Publication number Publication date
SE7409586L (it) 1975-02-18
CA987201A (en) 1976-04-13
SE412446B (sv) 1980-03-03
US3826090A (en) 1974-07-30
AU6293273A (en) 1975-05-29
FR2238852A1 (it) 1975-02-21
ATA605474A (de) 1976-04-15
ES428612A1 (es) 1976-08-16
AR203758A1 (es) 1975-10-15
DE2434840A1 (de) 1975-02-13
AU469509B2 (en) 1976-02-12
GB1474421A (en) 1977-05-25
FR2238852B1 (it) 1977-06-24
AT334217B (de) 1976-01-10

Similar Documents

Publication Publication Date Title
IT1016981B (it) Sistema idraulico a pressione va riabile
IT1008688B (it) Disposizione a colonna comprendente condutture per valvole idrauliche
IT976612B (it) Sistema di comando del pistone idraulico di un costipatore di rifiuti
AT333556B (de) Rohrverbindung
BR7403230D0 (pt) Sistema hidraulico
SE7701833L (sv) Snabbkoppling for fluidledningar
NL7408911A (nl) Buisuitzetinrichting.
AT335807B (de) Rohrverbindung
IT1004940B (it) Sistema di controllo a valvola idraulica
BE825341A (nl) Hydraulisch vloeistofsysteem
SE404622B (sv) Anleggning for manovrering av en tryckfluiddriven anordning
AT330530B (de) Druckkompensator fur einen drehbaren rohranschluss
BE819530A (fr) Valve a resserrement
AT330529B (de) Rohrverzweigungsstuck fur druckleitungen
SE396991B (sv) Rorforbindning
SE393666B (sv) Tryckbegrensningsventil for hydrauliska anleggningar
IT1012352B (it) Sistema idraulico
FR2287239A1 (fr) Installation a fluide sterile
AT333558B (de) Wellrohr
AR199032A1 (es) Acoplamiento de tuberia
ATA502073A (de) Rohrdichtung
IT967398B (it) Sistema azionato a fluido
IT1022267B (it) Fluido idraulico
AT339101B (de) Rohrverbindung
BE818743A (fr) Tuyau flexible