GB2257270B - Hydraulic switching system - Google Patents
Hydraulic switching systemInfo
- 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
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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/0422—Fluid 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)
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)
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)
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)
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 |
-
1992
- 1992-06-24 IT ITMI921550A patent/IT1255170B/en active IP Right Grant
- 1992-06-24 DE DE4220656A patent/DE4220656A1/en not_active Withdrawn
- 1992-06-26 GB GB9213679A patent/GB2257270B/en not_active Expired - Fee Related
- 1992-06-26 FR FR9207922A patent/FR2678323B1/en not_active Expired - Fee Related
Patent Citations (6)
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 |