FR2169397B1 - - Google Patents
Info
- Publication number
- FR2169397B1 FR2169397B1 FR7303047A FR7303047A FR2169397B1 FR 2169397 B1 FR2169397 B1 FR 2169397B1 FR 7303047 A FR7303047 A FR 7303047A FR 7303047 A FR7303047 A FR 7303047A FR 2169397 B1 FR2169397 B1 FR 2169397B1
- Authority
- FR
- France
- 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
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
-
- 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30505—Non-return valves, i.e. check 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/30565—Assemblies of multiple valves having multiple valves for a single output member, e.g. for creating higher valve function by use of multiple valves like two 2/2-valves replacing a 5/3-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
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
-
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19722203713 DE2203713A1 (de) | 1972-01-27 | 1972-01-27 | Schaltung fuer hydrostatisch betriebene arbeitsvorrichtungen |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2169397A1 FR2169397A1 (US07655688-20100202-C00086.png) | 1973-09-07 |
| FR2169397B1 true FR2169397B1 (US07655688-20100202-C00086.png) | 1978-08-04 |
Family
ID=5834138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7303047A Expired FR2169397B1 (US07655688-20100202-C00086.png) | 1972-01-27 | 1973-01-29 |
Country Status (5)
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5847109Y2 (ja) * | 1977-10-31 | 1983-10-27 | 株式会社クボタ | バックホウ兼ド−ザ作業車の回路構造 |
| JPS6129813Y2 (US07655688-20100202-C00086.png) * | 1980-07-07 | 1986-09-02 | ||
| DE3216249C2 (de) * | 1981-05-02 | 1986-08-21 | Hitachi Construction Machinery Co. Ltd., Tokio/Tokyo | Hydrauliksystem für Hoch- und Tiefbaumaschinen |
| JPS5810960U (ja) * | 1981-07-10 | 1983-01-24 | 日立建機株式会社 | 油圧ショベルの油圧回路 |
| IT1187892B (it) * | 1986-02-04 | 1987-12-23 | Chs Vickers Spa | Circuito idraulico di comando per organi di lavoro di macchine movimento terra con frenatura centralizzata degli attuatori |
| SE0302743L (sv) * | 2003-10-17 | 2004-10-19 | Bengt Olsson | Väljar- och riktningsanordning |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2768499A (en) * | 1953-04-20 | 1956-10-30 | John S Pilch | Hydraulic system comprising multiple pump and ram units |
| DE1426555A1 (de) * | 1964-07-27 | 1968-11-21 | Prerovske Strojirny Np | Vorrichtung fuer die Steuerung der hydraulischen Antriebsaggregate einer Erdbewegungsmaschine,insbesondere eines Baggers |
| GB1145531A (en) * | 1966-03-14 | 1969-03-19 | Hydraulic Drilling Equipment L | Hydraulic system |
-
1972
- 1972-01-27 DE DE19722203713 patent/DE2203713A1/de active Pending
-
1973
- 1973-01-25 IT IT6713273A patent/IT977669B/it active
- 1973-01-25 SE SE7301053A patent/SE402609B/xx unknown
- 1973-01-29 FR FR7303047A patent/FR2169397B1/fr not_active Expired
- 1973-01-29 GB GB441673A patent/GB1405724A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| GB1405724A (en) | 1975-09-10 |
| SE402609B (sv) | 1978-07-10 |
| DE2203713A1 (de) | 1973-08-09 |
| FR2169397A1 (US07655688-20100202-C00086.png) | 1973-09-07 |
| IT977669B (it) | 1974-09-20 |
Similar Documents
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |