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GB1380371A - Machine having a telescopic boom - Google Patents

Machine having a telescopic boom

Info

Publication number
GB1380371A
GB1380371A GB892873A GB892873A GB1380371A GB 1380371 A GB1380371 A GB 1380371A GB 892873 A GB892873 A GB 892873A GB 892873 A GB892873 A GB 892873A GB 1380371 A GB1380371 A GB 1380371A
Authority
GB
United Kingdom
Prior art keywords
rams
pump
fluid
valve
feb
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
GB892873A
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.)
Harnischfeger Corp
Original Assignee
Harnischfeger 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 Harnischfeger Corp filed Critical Harnischfeger Corp
Publication of GB1380371A publication Critical patent/GB1380371A/en
Expired legal-status Critical Current

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
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
    • 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
    • E02F9/2278—Hydraulic circuits
    • E02F9/2292—Systems with 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
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50536—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using unloading valves controlling the supply pressure by diverting fluid to the return line
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/515—Pressure control characterised by the connections of the pressure control means in the circuit
    • F15B2211/5151—Pressure control characterised by the connections of the pressure control means in the circuit being connected to a pressure source and a 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/605—Load sensing circuits
    • F15B2211/6058—Load sensing circuits with isolator 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
    • F15B2211/70—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)
  • Jib Cranes (AREA)

Abstract

1380371 Hydraulic control circuits HARNISCHFEGER CORP 23 Feb 1973 [24 Feb 1972] 8928/73 Heading F1P In the circuit shown, Fig. 2, when only one of the two rams 22, 24 is being extended pressure fluid is supplied from a pump 44, whereas when both rams are being extended fluid is supplied from pumps 42 and 44. Rams 22, 24 are respectively controlled by valves 54, 52 provided with operating levers 88, 82. With a valve 48 in the position shown, fluid from pump 42 returns to a reservoir 67, whilst fluid from pump 44 passes to valve manifold 50 and then either to reservoir 76 or to one of the rams for extending it, or to both rams for retraction. If the valves 52, 54, are operated to extend both rams simultaneously, the pressure rise in lines 106, 108 is sufficient when added together at inlet 62 to move the valve 48 against a spring 60 thereby connecting the output of the pump 42 to the line 68 as well as that of pump 44. Adjustable throttles 110, 112 are provided in lines 106, 108 to balance the flow therein. As described the rams are used in a telescopic boom for a crane or earth-working machine.
GB892873A 1972-02-24 1973-02-23 Machine having a telescopic boom Expired GB1380371A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US22902272A 1972-02-24 1972-02-24

Publications (1)

Publication Number Publication Date
GB1380371A true GB1380371A (en) 1975-01-15

Family

ID=22859520

Family Applications (1)

Application Number Title Priority Date Filing Date
GB892873A Expired GB1380371A (en) 1972-02-24 1973-02-23 Machine having a telescopic boom

Country Status (6)

Country Link
US (1) US3760689A (en)
JP (1) JPS4898281A (en)
CA (1) CA971920A (en)
DE (1) DE2308810A1 (en)
FR (1) FR2173164B1 (en)
GB (1) GB1380371A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4534268A (en) * 1981-07-10 1985-08-13 Hitachi Construction Machinery Co., Ltd. Hydraulic fluid circuit of hydraulic shovel
US7703616B2 (en) * 2005-08-01 2010-04-27 Liebherr-Werk Ehingen Gmbh Telescopable sliding beam

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4179981A (en) * 1975-10-30 1979-12-25 Poclain Device for sequentially supplying several hydraulic motors
US4089171A (en) * 1976-05-24 1978-05-16 Webster Electric Company, Inc. Four position valve assembly
US4416138A (en) * 1980-03-05 1983-11-22 Usm Corporation Extrusion press die change assembly
US4335577A (en) * 1980-06-19 1982-06-22 Deere & Company Hydraulic system having variable displacement pumps controlled by power beyond flow
DE3132342C2 (en) * 1981-08-17 1987-01-29 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Hydrostatic auxiliary steering system
US4819430A (en) * 1983-01-21 1989-04-11 Hydreco, Inc. Variably charged hydraulic circuit
DE3319408A1 (en) * 1983-05-28 1984-11-29 Robert Bosch Gmbh, 7000 Stuttgart POWER STEERING DEVICE WITH AT LEAST ONE HYDRAULIC ADDITIONAL CONSUMER CONNECTED TO IT
US4632158A (en) * 1985-08-01 1986-12-30 Clark Equipment Company Power limiting hydraulic system
JPH01150202U (en) * 1988-04-08 1989-10-17
US4976187A (en) * 1988-08-24 1990-12-11 Crane Carrier Company Fast sweep power cylinder for refuse trucks
AU631727B2 (en) * 1990-03-09 1992-12-03 Kubota Corporation Hydraulic circuit for a working vehicle having a plurality of hydraulic actuators
US5332053A (en) * 1993-01-26 1994-07-26 Aquilon Technologies Inc. Hydraulic drive system
JP2932892B2 (en) * 1993-05-27 1999-08-09 ダイキン工業株式会社 Ultra high pressure generator
US6116006A (en) * 1999-05-27 2000-09-12 Deere & Company Hydraulic system for a detachable implement
GB2387674B (en) * 2002-04-20 2005-09-07 Agco Sa Load sensing hydraulic system
US7251934B2 (en) * 2004-03-27 2007-08-07 Cnh America Llc Work vehicle hydraulic system
US8801407B2 (en) * 2010-02-24 2014-08-12 Harris Waste Management Group, Inc. Hybrid electro-hydraulic power device
JP6368553B2 (en) * 2014-06-06 2018-08-01 Ｋｙｂ株式会社 Fluid pressure system
JP6510396B2 (en) * 2015-12-28 2019-05-08 日立建機株式会社 Work machine
WO2019202458A2 (en) * 2018-04-17 2019-10-24 Socolovsky Eviatar Hydraulic intensifiers, boosters and/or controllers
US11015622B2 (en) * 2018-04-17 2021-05-25 Eviatar SOCOLOVSKY Hydraulic intensifiers, boosters and/or controllers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2643516A (en) * 1951-12-08 1953-06-30 Goodman Mfg Co Fluid pressure system
US2797551A (en) * 1952-05-17 1957-07-02 American Brake Shoe Co Hydraulic system and pump means therefor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4534268A (en) * 1981-07-10 1985-08-13 Hitachi Construction Machinery Co., Ltd. Hydraulic fluid circuit of hydraulic shovel
US7703616B2 (en) * 2005-08-01 2010-04-27 Liebherr-Werk Ehingen Gmbh Telescopable sliding beam

Also Published As

Publication number Publication date
CA971920A (en) 1975-07-29
JPS4898281A (en) 1973-12-13
US3760689A (en) 1973-09-25
FR2173164B1 (en) 1978-08-11
FR2173164A1 (en) 1973-10-05
DE2308810A1 (en) 1973-09-06

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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