JPS4957275A - - Google Patents
Info
- Publication number
- JPS4957275A JPS4957275A JP48078547A JP7854773A JPS4957275A JP S4957275 A JPS4957275 A JP S4957275A JP 48078547 A JP48078547 A JP 48078547A JP 7854773 A JP7854773 A JP 7854773A JP S4957275 A JPS4957275 A JP S4957275A
- Authority
- JP
- Japan
- 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.)
- Pending
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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
-
- 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
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
- F15B2211/20553—Type of pump variable capacity with pilot circuit, e.g. for controlling a swash plate
-
- 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
- F15B2211/27—Directional control by means of the pressure source
-
- 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
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3111—Neutral or centre positions the pump port being closed in the centre position, e.g. so-called closed 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
- F15B2211/30—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
- F15B2211/60—Circuit components or control therefor
- F15B2211/605—Load sensing circuits
- F15B2211/6051—Load sensing circuits having valve means between output member and the load sensing circuit
-
- 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27130372A | 1972-07-13 | 1972-07-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS4957275A true JPS4957275A (US07655688-20100202-C00010.png) | 1974-06-04 |
Family
ID=23035011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP48078547A Pending JPS4957275A (US07655688-20100202-C00010.png) | 1972-07-13 | 1973-07-13 |
Country Status (11)
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5133201U (US07655688-20100202-C00010.png) * | 1974-09-03 | 1976-03-11 | ||
| JPS62191682A (ja) * | 1986-02-17 | 1987-08-22 | Kawasaki Heavy Ind Ltd | 可変容量形ポンプの流量制御回路 |
| JPH01118201U (US07655688-20100202-C00010.png) * | 1988-02-05 | 1989-08-10 |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4178962A (en) * | 1972-10-30 | 1979-12-18 | Tomco, Inc. | Control valve with flow control means |
| US4197705A (en) * | 1978-05-30 | 1980-04-15 | General Signal Corporation | Hydraulic control system |
| JPS636474Y2 (US07655688-20100202-C00010.png) * | 1980-07-28 | 1988-02-23 | ||
| US4408453A (en) * | 1981-01-16 | 1983-10-11 | General Signal Corporation | Hydraulic control system |
| DE3109045A1 (de) * | 1981-03-10 | 1982-09-16 | Alfred Teves Gmbh, 6000 Frankfurt | Regelbare hydraulikpumpe |
| JPH0643523Y2 (ja) * | 1987-10-14 | 1994-11-14 | カヤバ工業株式会社 | 建設機械用制御弁 |
| US5265422A (en) * | 1992-05-15 | 1993-11-30 | Sauer Inc. | Pilot-operated pressure override valve |
| FR2693241B1 (fr) * | 1992-07-03 | 1994-09-30 | Rexroth Sigma | Circuit hydraulique de commande en pression d'un distributeur hydraulique du type à centre ouvert. |
| FR2827952A1 (fr) * | 2001-07-27 | 2003-01-31 | Osmos Sa | Dispositif de mesure d'un deplacement et procede associe |
| US20060242955A1 (en) * | 2005-04-19 | 2006-11-02 | Clark Equipment Company | Hydraulic system with piston pump and open center valve |
| US9347200B2 (en) | 2012-06-04 | 2016-05-24 | Cnh Industrial America Llc | Fluid control system for work vehicle |
| JP5758348B2 (ja) * | 2012-06-15 | 2015-08-05 | 住友建機株式会社 | 建設機械の油圧回路 |
| US9334629B2 (en) | 2013-03-15 | 2016-05-10 | Deere And Company | Open-center hydraulic system with machine information-based flow control |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2238060A (en) * | 1938-02-08 | 1941-04-15 | Manly Corp | Fluid pressure feed and rapid traverse system of transmission of power |
| US3250227A (en) * | 1963-08-09 | 1966-05-10 | American Brake Shoe Co | Torque control apparatus for hydraulic power units |
| GB1126873A (en) * | 1964-09-22 | 1968-09-11 | Sperry Rand Corp | Improvements in hydraulic supply and control systems |
| US3366064A (en) * | 1965-03-10 | 1968-01-30 | Borg Warner | Control for hydraulic apparatus |
| US3444689A (en) * | 1967-02-02 | 1969-05-20 | Weatherhead Co | Differential pressure compensator control |
| GB1262488A (en) * | 1968-06-04 | 1972-02-02 | Dowty Technical Dev Ltd | Hydraulic apparatus for including variable-delivery pumps |
-
1972
- 1972-07-13 US US00271303A patent/US3788077A/en not_active Expired - Lifetime
-
1973
- 1973-07-03 ZA ZA00734473A patent/ZA734473B/xx unknown
- 1973-07-04 CA CA175,618A patent/CA988812A/en not_active Expired
- 1973-07-09 FR FR7325081A patent/FR2193153B1/fr not_active Expired
- 1973-07-09 AU AU57897/73A patent/AU5789773A/en not_active Expired
- 1973-07-09 BE BE133285A patent/BE802105A/xx unknown
- 1973-07-12 IT IT26536/73A patent/IT991259B/it active
- 1973-07-12 NL NL7309725A patent/NL7309725A/xx unknown
- 1973-07-13 DE DE19732335703 patent/DE2335703A1/de active Pending
- 1973-07-13 JP JP48078547A patent/JPS4957275A/ja active Pending
- 1973-07-13 BR BR5249/73A patent/BR7305249D0/pt unknown
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5133201U (US07655688-20100202-C00010.png) * | 1974-09-03 | 1976-03-11 | ||
| JPS62191682A (ja) * | 1986-02-17 | 1987-08-22 | Kawasaki Heavy Ind Ltd | 可変容量形ポンプの流量制御回路 |
| JPH01118201U (US07655688-20100202-C00010.png) * | 1988-02-05 | 1989-08-10 |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2193153B1 (US07655688-20100202-C00010.png) | 1976-06-18 |
| BR7305249D0 (pt) | 1974-08-15 |
| DE2335703A1 (de) | 1974-01-24 |
| FR2193153A1 (US07655688-20100202-C00010.png) | 1974-02-15 |
| IT991259B (it) | 1975-07-30 |
| US3788077A (en) | 1974-01-29 |
| CA988812A (en) | 1976-05-11 |
| AU5789773A (en) | 1975-01-09 |
| ZA734473B (en) | 1975-01-29 |
| NL7309725A (US07655688-20100202-C00010.png) | 1974-01-15 |
| BE802105A (fr) | 1973-11-05 |
