GB1383779A - Hydraulic control system - Google Patents

Hydraulic control system

Info

Publication number
GB1383779A
GB1383779A GB2639672A GB2639672A GB1383779A GB 1383779 A GB1383779 A GB 1383779A GB 2639672 A GB2639672 A GB 2639672A GB 2639672 A GB2639672 A GB 2639672A GB 1383779 A GB1383779 A GB 1383779A
Authority
GB
United Kingdom
Prior art keywords
valve
spool
end surface
main valve
main
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
GB2639672A
Inventor
D A Knutson
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.)
Enerpac Tool Group Corp
Original Assignee
Applied Power Industries Inc
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 Applied Power Industries Inc filed Critical Applied Power Industries Inc
Publication of GB1383779A publication Critical patent/GB1383779A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/32—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/30—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom
    • E02F3/308—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets with a dipper-arm pivoted on a cantilever beam, i.e. boom working outwardly
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
    • E02F3/425—Drive systems for dipper-arms, backhoes or the like
    • 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
    • E02F9/2004—Control mechanisms, e.g. control levers
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/10—Special arrangements for operating the actuated device with or without using fluid pressure, e.g. for emergency use
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/16—Special measures for feedback, e.g. by a follow-up device
    • 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
    • F15B9/00—Servomotors with follow-up action, e.g. obtained by feed-back control, i.e. in which the position of the actuated member conforms with that of the controlling member
    • F15B9/16—Systems essentially having two or more interacting servomotors, e.g. multi-stage

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Operation Control Of Excavators (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Mechanically-Actuated Valves (AREA)

Abstract

1383779 Fluid pressure apparatus APPLIED POWER INDUSTRIES Inc 6 June 1972 [25 June 1971] 26396/72 Heading F1P [Also in Divisions El and F2] A hydraulic system for controlling an hydraulically actuated piston cylinder power unit from a point remote from the unit comprises a manual control 62 operating through a mechanical system 66a a remotely situated, reciprocable pilot valve 150, 226 controlling, in proportion to its movements, the movements of a reciprocable main valve 108, that normally adopts a null or balanced position, to move the valve from said position upon movement of the manual control to selectively supply pressurized fluid to and to relieve fluid from the power unit. Preferably the control 62 is a joy stick control for controlling three such hydraulic control systems A, B, C, each system regulating an associated one of the power units 28 of a shovel excavator. The main valve may be a four way spool valve 102, 200 and the pilot valve 150, 226 can be a spool valve reciprocably mounted within a bore in the spool 108 of the main valve or in an extension 204 of the spool valve 200, the valves having lands and internal bores appropriate to the desired control function of the main valve. One end surface 178 of the main spool valve 102 or the end surface 218, 220 of a flange 212 on the extension 204 is in constant communication with the fluid pressure source of the system whilst the other end surface 168 of the valve or surface 222 of flange 222, to which the pressurized fluid is applied when the pilot valve is moved to initiate movement of the main valve spool is twice the area of the other end surface 178, 218, 220. A mechanical feedback means 90a may be provided between the power unit and the pilot valve to cause recenfring of the pilot valve after movement of the main valve has occurred to cause actuation of the power unit.
GB2639672A 1971-06-25 1972-06-06 Hydraulic control system Expired GB1383779A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US15662071A 1971-06-25 1971-06-25

Publications (1)

Publication Number Publication Date
GB1383779A true GB1383779A (en) 1974-02-12

Family

ID=22560327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2639672A Expired GB1383779A (en) 1971-06-25 1972-06-06 Hydraulic control system

Country Status (9)

Country Link
AU (1) AU3641271A (en)
CA (1) CA951224A (en)
CH (1) CH536962A (en)
DE (1) DE2230897A1 (en)
FR (1) FR2142900B1 (en)
GB (1) GB1383779A (en)
IT (1) IT945199B (en)
NL (1) NL7116950A (en)
SE (1) SE373415B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129528A (en) * 1982-11-04 1984-05-16 Spectra Physics Valve with internal pilot

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3239596A1 (en) * 1982-10-26 1984-05-03 Alho, Harry, 78053 Nas PRESSURE CONTROLLED TOOL
DE68913412T2 (en) * 1988-09-08 1994-09-29 Caterpillar Inc Intuitive control lever for an implement.
US5002454A (en) * 1988-09-08 1991-03-26 Caterpillar Inc. Intuitive joystick control for a work implement
DE69004287T2 (en) * 1989-02-16 1994-02-24 Kubota Kk Hydraulic pipe arrangement for a backhoe.
FR3049014B1 (en) * 2016-03-17 2018-07-27 Agram REMOTE CONTROL OF HYDRAULIC EQUIPMENT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2129528A (en) * 1982-11-04 1984-05-16 Spectra Physics Valve with internal pilot

Also Published As

Publication number Publication date
DE2230897A1 (en) 1972-12-28
NL7116950A (en) 1972-12-28
CA951224A (en) 1974-07-16
CH536962A (en) 1973-05-15
AU3641271A (en) 1973-06-07
SE373415B (en) 1975-02-03
FR2142900A1 (en) 1973-02-02
IT945199B (en) 1973-05-10
FR2142900B1 (en) 1975-08-29

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees