GB2257270B - Hydraulic switching system - Google Patents

Hydraulic switching system

Info

Publication number
GB2257270B
GB2257270B GB9213679A GB9213679A GB2257270B GB 2257270 B GB2257270 B GB 2257270B GB 9213679 A GB9213679 A GB 9213679A GB 9213679 A GB9213679 A GB 9213679A GB 2257270 B GB2257270 B GB 2257270B
Authority
GB
United Kingdom
Prior art keywords
switching system
hydraulic switching
hydraulic
switching
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 - Fee Related
Application number
GB9213679A
Other versions
GB9213679D0 (en
GB2257270A (en
Inventor
Rudolf Becker
Otwin Eich
Horst Kahl
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.)
Oerlikon Barmag AG
Original Assignee
Barmag AG
Barmag Barmer Maschinenfabrik AG
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 Barmag AG, Barmag Barmer Maschinenfabrik AG filed Critical Barmag AG
Publication of GB9213679D0 publication Critical patent/GB9213679D0/en
Publication of GB2257270A publication Critical patent/GB2257270A/en
Application granted granted Critical
Publication of GB2257270B publication Critical patent/GB2257270B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/042Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
    • F15B13/0422Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with manually-operated pilot valves, e.g. joysticks

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
GB9213679A 1991-06-27 1992-06-26 Hydraulic switching system Expired - Fee Related GB2257270B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4121235 1991-06-27

Publications (3)

Publication Number Publication Date
GB9213679D0 GB9213679D0 (en) 1992-08-12
GB2257270A GB2257270A (en) 1993-01-06
GB2257270B true GB2257270B (en) 1995-08-30

Family

ID=6434866

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9213679A Expired - Fee Related GB2257270B (en) 1991-06-27 1992-06-26 Hydraulic switching system

Country Status (4)

Country Link
DE (1) DE4220656A1 (en)
FR (1) FR2678323B1 (en)
GB (1) GB2257270B (en)
IT (1) IT1255170B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06173904A (en) * 1992-12-08 1994-06-21 Komatsu Ltd Rotary hydraulic circuit
DE19833489A1 (en) 1998-07-24 2000-01-27 Mannesmann Rexroth Ag Hydraulic circuit for controlling user of work apparatus has pump supplying user with pressure medium via feed conduit with back flow conduit feeding back to tank

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB814618A (en) * 1955-04-29 1959-06-10 New York Air Brake Co Hydraulic control systems more particularly for bulldozers and the like
GB1369664A (en) * 1970-09-11 1974-10-09 Koppen Lethem Trading Devices for limitting pressure in a hydraulic circuit
GB2013841A (en) * 1978-01-30 1979-08-15 Caterpillar Tractor Co Work fluid system
WO1986004963A1 (en) * 1985-02-23 1986-08-28 Barmag Barmer Maschinenfabrik Aktiengesellschaft Proportional valve with variable pre-loading of the balance spring non-proportionally to the load pressure
EP0462590B1 (en) * 1990-06-19 1995-12-27 Hitachi Construction Machinery Co., Ltd. Hydraulic drive system for civil-engineering and construction machine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3646959A (en) * 1970-10-12 1972-03-07 Sperry Rand Corp Power transmission
JPS5663102A (en) * 1979-10-29 1981-05-29 Kobe Steel Ltd Turning oil-pressure circuit for oil-pressure shovel, etc.
JPS60249706A (en) * 1984-05-22 1985-12-10 Toshiba Mach Co Ltd Hydraulic control device
JPS612908A (en) * 1984-06-14 1986-01-08 Toshiba Mach Co Ltd Control valve device
JPH076525B2 (en) * 1987-01-09 1995-01-30 株式会社神戸製鋼所 Swing hydraulic circuit of construction machinery

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB814618A (en) * 1955-04-29 1959-06-10 New York Air Brake Co Hydraulic control systems more particularly for bulldozers and the like
GB1369664A (en) * 1970-09-11 1974-10-09 Koppen Lethem Trading Devices for limitting pressure in a hydraulic circuit
GB2013841A (en) * 1978-01-30 1979-08-15 Caterpillar Tractor Co Work fluid system
WO1986004963A1 (en) * 1985-02-23 1986-08-28 Barmag Barmer Maschinenfabrik Aktiengesellschaft Proportional valve with variable pre-loading of the balance spring non-proportionally to the load pressure
US4794846A (en) * 1985-02-23 1989-01-03 Barmag Ag Proportional action valve with a biased spring unproportionately variable to the load pressure
EP0462590B1 (en) * 1990-06-19 1995-12-27 Hitachi Construction Machinery Co., Ltd. Hydraulic drive system for civil-engineering and construction machine

Also Published As

Publication number Publication date
GB9213679D0 (en) 1992-08-12
FR2678323A1 (en) 1992-12-31
ITMI921550A1 (en) 1993-12-24
FR2678323B1 (en) 1996-02-16
IT1255170B (en) 1995-10-20
GB2257270A (en) 1993-01-06
DE4220656A1 (en) 1993-01-07
ITMI921550A0 (en) 1992-06-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19990626