ES404358A1 - Control device for load-independent regulation of hydraulic consumers - Google Patents
Control device for load-independent regulation of hydraulic consumersInfo
- Publication number
- ES404358A1 ES404358A1 ES404358A ES404358A ES404358A1 ES 404358 A1 ES404358 A1 ES 404358A1 ES 404358 A ES404358 A ES 404358A ES 404358 A ES404358 A ES 404358A ES 404358 A1 ES404358 A1 ES 404358A1
- Authority
- ES
- Spain
- Prior art keywords
- pressure
- hole
- control
- line
- throttle
- 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
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
-
- 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
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
-
- 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
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
-
- 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
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
- F15B13/0417—Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation 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
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20538—Type of pump constant capacity
-
- 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-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
- F15B2211/30—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
- F15B2211/3144—Directional control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional 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
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/321—Directional control characterised by the type of actuation mechanically
- F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
-
- 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
- F15B2211/35—Directional control combined with flow control
- F15B2211/351—Flow control by regulating means in feed line, i.e. meter-in control
-
- 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
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50554—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure downstream of the pressure control means, e.g. pressure reducing 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
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
- F15B2211/50581—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using counterbalance 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
- F15B2211/50—Pressure control
- F15B2211/51—Pressure control characterised by the positions of the valve element
- F15B2211/513—Pressure control characterised by the positions of the valve element the positions being continuously variable, e.g. as realised by proportional 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
- F15B2211/50—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
- F15B2211/50—Pressure control
- F15B2211/57—Control of a differential pressure
-
- 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
- F15B2211/60—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
- F15B2211/6055—Load sensing circuits having valve means between output member and the load sensing circuit using pressure relief 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6316—Electronic controllers using input signals representing a pressure the pressure being a pilot pressure
-
- 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
- F15B2211/67—Methods for controlling pilot pressure
-
- 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
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting output members
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Servomotors (AREA)
- Multiple-Way Valves (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Reciprocating Pumps (AREA)
- Safety Valves (AREA)
Abstract
Control device for independent speed control and regulation of the load of hydraulic consuming equipment in hydraulically actuated installations, provided with at least one control valve unit that includes a movable sliding element in a crankcase by means of which the The pump line can be connected to the consuming equipment and the consuming equipment to the return line by means of an adjustable passage, as well as a pressure balancing valve to maintain a constant pressure difference between the pump line and the consumer equipment line including a crankcase with a movable sliding control element, which, as a result of the action of the pressure of the pump at its first end and the action of the pressure propagated from a line of consuming equipment through of internal pressure pilot holes, as well as a control spring at its other end, forms a throttling hole between the pump line and the return line, while supply and discharge elements are provided for the hydraulic means from and towards the control slide valve, said control device characterized in that, to influence the pressure difference between the pump line (48) and a consumer equipment line (6, 7) in the crankcase of the control valve unit (2a, 2b, 2c), a pilot port pressure regulators (61, 63, 70, 62, 64, 71, respectively), which must be selectively connected to the line of the consuming equipment (6, 7) by a bushing (56) of the sliding control valve ( 10) of said control valve unit (2a, 2b, 2c ...) and through a valve that acts on the pressure (8, 9) that includes a pressure reducing piston (28) which, by variation of the axial displacement forms a throttle hole in said hole charge pressure pilot (61, 63, 70, 62, 64, 71, respectively), whereby said pressure reducing piston (28) at its first end is subject to the influence of pressure upstream of the throttle port formed by said pressure reducing piston (28) and, at its other end, it is under the influence of pressure downstream of the throttle hole formed by said pressure reducing piston (28), and also at this last end it is loaded by the pressure of a spring (34) and there is also a control piston (37) that closes an auxiliary hole (78, 80, 81) that leads to the return line (50a) connected from the pilot pressure hole downstream of the hole throttle formed in said load pressure pilot hole by the pressure reduction piston (28) and that forms a throttle hole in said auxiliary hole (78, 80, 81) to produce a constant leak, whereby the control piston (37) in a first chamber (79a) is, by its first end under the influence of pressure in the pilot pressure hole (70, 71), and in a second chamber (79b) by its other end is under the influence of pressure downstream of the throttle duct (38) of said control piston (37) but downstream of a throttle hole formed between the second chamber (79b) and an outlet duct (80, 80a) that leads to the tank, and is also loaded at this last end by the pressure of a spring (42). (Machine-translation by Google Translate, not legally binding)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7108960A NL169628C (en) | 1971-06-29 | 1971-06-29 | CONTROL DEVICE FOR LAST-DEPENDENT CONTROL OF HYDRAULIC DRIVE DEVICES. |
Publications (1)
Publication Number | Publication Date |
---|---|
ES404358A1 true ES404358A1 (en) | 1975-06-01 |
Family
ID=19813507
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES404358A Expired ES404358A1 (en) | 1971-06-29 | 1972-06-28 | Control device for load-independent regulation of hydraulic consumers |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS5815643B1 (en) |
AT (1) | AT325511B (en) |
CA (1) | CA969061A (en) |
DE (1) | DE2231217C2 (en) |
ES (1) | ES404358A1 (en) |
FR (1) | FR2143975B1 (en) |
GB (1) | GB1396926A (en) |
IT (1) | IT958536B (en) |
NL (1) | NL169628C (en) |
SE (1) | SE380587B (en) |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2514624C3 (en) * | 1975-04-03 | 1986-10-23 | Danfoss A/S, Nordborg | Control device for at least one hydraulically operated double-acting consumer |
NZ199059A (en) * | 1980-11-27 | 1985-02-28 | Vapormatic Co Ltd | Hydraulic selector valve:fluid supplied to hydraulic device of directional control valve |
US4436019A (en) * | 1981-08-20 | 1984-03-13 | Caterpillar Tractor Company | Pressure compensated fluid control valve |
DE3176924D1 (en) * | 1981-08-20 | 1988-12-08 | Caterpillar Inc | Load responsive fluid control valve |
EP0086772B1 (en) * | 1981-08-20 | 1988-11-09 | Caterpillar Inc. | Load responsive system controls |
WO1983003644A1 (en) * | 1982-04-19 | 1983-10-27 | Tadeusz Budzich | Dual control input flow control valve |
IT1161583B (en) * | 1983-02-25 | 1987-03-18 | Same Spa | IMPROVEMENTS IN HYDRAULIC POWER SUPPLY CIRCUITS |
DE3805061A1 (en) * | 1988-02-18 | 1989-08-31 | Linde Ag | HYDRAULIC SWITCHING ARRANGEMENT |
DE3833999A1 (en) * | 1988-10-06 | 1990-04-12 | Bosch Gmbh Robert | HYDRAULIC CONTROL DEVICE |
US5077972A (en) * | 1990-07-03 | 1992-01-07 | Caterpillar Inc. | Load pressure duplicating circuit |
DE19957952A1 (en) * | 1999-12-02 | 2001-06-07 | Mannesmann Rexroth Ag | Hydraulic directional control valve for load-independent control of a hydraulic consumer, especially of a mobile machine |
DE10040737A1 (en) * | 2000-08-17 | 2002-02-28 | Mannesmann Rexroth Ag | Valve arrangement for pressure medium supply hydraulic consumer has consumer pressure limitation valve with pilot valve unit |
CN102748506B (en) * | 2012-06-21 | 2013-12-18 | 中煤张家口煤矿机械有限责任公司 | Electro-hydraulic pilot control switch valve bank |
CN104912868B (en) * | 2015-07-06 | 2017-06-30 | 玉林市富山液压件制造有限公司 | A kind of combined type oil sources valve |
CN108708994B (en) * | 2018-06-21 | 2020-04-14 | 湖北三江航天红峰控制有限公司 | Pneumatic control double-way electromagnetic valve |
CN110953363A (en) * | 2019-12-27 | 2020-04-03 | 乐山市前沿油气设备制造有限公司 | Electric regulating valve |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB652362A (en) * | 1947-02-11 | 1951-04-25 | Prec Developments Co Ltd | Improvements relating to hydraulic power transmission apparatus |
US2892312A (en) * | 1958-01-27 | 1959-06-30 | Deere & Co | Demand compensated hydraulic system |
US3467126A (en) * | 1966-03-21 | 1969-09-16 | Hydranamic Systems Corp | Hydraulic load compensating directional control valve |
CH444601A (en) * | 1966-12-13 | 1967-09-30 | Beringer Hydraulik Gmbh | Control device for hydraulically operated equipment |
US3470694A (en) * | 1968-04-30 | 1969-10-07 | Weatherhead Co | Flow proportional valve for load responsive system |
-
1971
- 1971-06-29 NL NL7108960A patent/NL169628C/en not_active IP Right Cessation
-
1972
- 1972-06-14 GB GB2785372A patent/GB1396926A/en not_active Expired
- 1972-06-19 CA CA145,042A patent/CA969061A/en not_active Expired
- 1972-06-26 DE DE19722231217 patent/DE2231217C2/en not_active Expired
- 1972-06-27 AT AT555072A patent/AT325511B/en not_active IP Right Cessation
- 1972-06-27 IT IT5117372A patent/IT958536B/en active
- 1972-06-28 FR FR7224196A patent/FR2143975B1/fr not_active Expired
- 1972-06-28 ES ES404358A patent/ES404358A1/en not_active Expired
- 1972-06-29 SE SE859272A patent/SE380587B/en unknown
- 1972-06-29 JP JP6536972A patent/JPS5815643B1/ja active Pending
Also Published As
Publication number | Publication date |
---|---|
NL7108960A (en) | 1973-01-03 |
SE380587B (en) | 1975-11-10 |
IT958536B (en) | 1973-10-30 |
DE2231217A1 (en) | 1973-01-11 |
GB1396926A (en) | 1975-06-11 |
AT325511B (en) | 1975-10-27 |
NL169628C (en) | 1982-08-02 |
FR2143975A1 (en) | 1973-02-09 |
DE2231217C2 (en) | 1984-08-09 |
NL169628B (en) | 1982-03-01 |
CA969061A (en) | 1975-06-10 |
JPS5815643B1 (en) | 1983-03-26 |
FR2143975B1 (en) | 1976-08-06 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES404358A1 (en) | Control device for load-independent regulation of hydraulic consumers | |
US2238063A (en) | Fluid pressure system and valve mechanism therefor | |
US1964196A (en) | Regulator for hydraulic cylinders | |
US2845087A (en) | Modulating regulators | |
US3033277A (en) | Fuel supply system | |
US2594689A (en) | Fluid operated speed governor | |
US2630135A (en) | Fluid distributing valve | |
US3924655A (en) | Hydraulic control arrangement | |
US4080994A (en) | Control arrangement for supplying pressure fluid to at least two hydraulically operated consumer devices | |
US4196708A (en) | Engine systems | |
US2601870A (en) | Valve mechanism | |
US3186424A (en) | Hydraulic control valves | |
GB1299658A (en) | Hydraulic flow-operated shut-off device | |
US2437480A (en) | Valve | |
US2781049A (en) | Liquid flow control valve system | |
US3663126A (en) | Fluid control systems | |
GB951691A (en) | Improvements in or relating to control valve systems for controlling fluid motors | |
US3756264A (en) | Pressure control devices for fluid flow systems | |
US2564108A (en) | Remote control device | |
US2713312A (en) | Pressure compensator | |
US3060951A (en) | Hydraulic regulating system | |
US1958410A (en) | Control valve fob fuel pumps | |
ES330880A1 (en) | Improvements in fuel regulation devices. (Machine-translation by Google Translate, not legally binding) | |
US2006311A (en) | Leakage compensator for hydraulic systems | |
US4004418A (en) | Demand compensated hydraulic system with flow sensitive device |