SE525355C2 - Outriggers valve - Google Patents
Outriggers valveInfo
- Publication number
- SE525355C2 SE525355C2 SE0301777A SE0301777A SE525355C2 SE 525355 C2 SE525355 C2 SE 525355C2 SE 0301777 A SE0301777 A SE 0301777A SE 0301777 A SE0301777 A SE 0301777A SE 525355 C2 SE525355 C2 SE 525355C2
- Authority
- SE
- Sweden
- Prior art keywords
- consumer
- flow
- priority
- valve
- control valve
- Prior art date
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
- F15B11/16—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
- F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
-
- 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
- F15B13/022—Flow-dividers; Priority 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
- F15B2211/20546—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
- F15B2211/31—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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- 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
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow control characterised by the type of actuation actuated by fluid 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
- F15B2211/40—Flow control
- F15B2211/45—Control of bleed-off flow, e.g. control of bypass flow 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
- F15B2211/60—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
- F15B2211/6054—Load sensing circuits having valve means between output member and the load sensing circuit using shuttle 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
- F15B2211/70—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
-
- 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
- F15B2211/78—Control of multiple output members
- F15B2211/781—Control of multiple output members one or more output members having priority
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)
- Pens And Brushes (AREA)
- Forging (AREA)
- Check Valves (AREA)
Abstract
Description
20 25 30 35 5 2 5 2 stödbensventilen och en port till kranventilen. Prioritetsventilen styrs av en signal från stödbensventilen, vilket oftast löses genom en pilotledning vilken ger ett pilotflöde från stödbensventilen till prioritetsventilen. Denna lösning ger även denna en förhållandevis komplicerad och dyr ventil i förhållande till stödbensventilens enkla funktioner. Fördelarna med att parallellkoppla ventilerna via en separat prioritetsventil är att stödbensventilen ej är trycksatt under körning av kranventilen. Dessutom minskar tryckfallet över ventilerna. 20 25 30 35 5 2 5 2 the outrigger valve and a port for the tap valve. The priority valve is controlled by a signal from the support leg valve, which is usually solved by a pilot line which provides a pilot flow from the support leg valve to the priority valve. This solution also gives it a relatively complicated and expensive valve in relation to the simple functions of the outrigger valve. The advantages of connecting the valves in parallel via a separate priority valve is that the outrigger valve is not pressurized while the crane valve is running. In addition, the pressure drop across the valves decreases.
Nackdelen i form av dyra och komplicerade ventiler med extra slangdragningar kvarstår dock. Dessutom krävs speciella kopplingsförfaranden beroende på vilken typ av pump som används.However, the disadvantage in the form of expensive and complicated valves with extra hose runs remains. In addition, special coupling procedures are required depending on the type of pump used.
Ett syfte med den föreliggande uppfinningen är att åstadkomma en ventil för körning av i första hand stödbenen hos en timmerkran hos en lastbil, men även styrning av exempelvis förflyttning av förarhytten eller timmerbankarna pà ett enkelt och billigt sätt utan komplicerade slangdragningar eller kompletterande ventiler. Ett annat syfte är att kunna använda anordningen tillsamman med en hydraulpump med antingen variabelt eller fast deplacement.An object of the present invention is to provide a valve for driving primarily the support legs of a timber crane of a truck, but also to control, for example, movement of the cab or timber benches in a simple and inexpensive manner without complicated hose runs or additional valves. Another object is to be able to use the device together with a hydraulic pump with either variable or fixed displacement.
Dessa syften löses genom att stödbensventilen innefattar en i ett stycke bildad enhet med en inbyggd prioritetsventil och manöverventiler med stängt centrum, vilka manöverventiler via ett signaltryck genom en i huset befintlig kanal till prioritetsventilen reglerar flödet.These objects are solved by the support leg valve comprising a one-piece unit with a built-in priority valve and control valves with closed center, which control valves via a signal pressure through a channel present in the housing to the priority valve regulate the flow.
Den föreliggande uppfinningen kommer att beskrivas i det följande under hänvisning till de bifogande ritningarna vilka visar en som exempel vald utföringsform, av vilka: fig. 1 visar ett tvärsnitt genom en ventil enligt uppfinningen kopplad till en pump med fast deplacement, och fig. 2 visar ett tvärsnitt genom en ventil enligt uppfinningen kopplad till en pump med variabelt deplacement.The present invention will be described in the following with reference to the accompanying drawings which show an exemplary embodiment, of which: Fig. 1 shows a cross section through a valve according to the invention connected to a pump with fixed displacement, and Fig. 2 shows a cross section through a valve according to the invention connected to a pump with variable displacement.
Med hänvisning till figurerna innefattar en uppfinningsenlig ventil ett i ett stycke utformat ventilhus 1 med en inloppsport 2 ansluten till en hydraulpump (P) med fast eller variabelt deplacement, en utloppsport 3 ansluten till en hydraultank (T), en utloppsport 4 ansluten till den ventil 5:1 som styr funktioner hos en förbrukare,exempelvis en kran, samt, i detta utföringsexempel, utlopp till fyra förbrukare 5:2a - 5:2d med fyra identiska manöverventiler 6 a - d för styrning av exempelvis stödben, bankförskjutning och liknande funktioner. Ventilen kan anpassas till de krav som ställs på dess funktioner utöver exempelvis stödben och bankförskjutning, genom att fler manöverventiler kan kopplas samman med ventilhuset 1. lnloppsporten 2 är kopplad till en i ventilhuset 1 integrerad prioritetsventil 7 i vilken en fiäderbelastad slid 8, den s.k. prioritetssliden, är placerad. l l(-\Dainrü\1 1 fl.\ 1 101 flfiGfiñQEHYÅfiR1flfinv¶ Ann »nian 10 15 20 25 30 35 n .se ou 525 555 s slidens 8 ena ände är anordnad en första kammare 9 för uppbyggande av ett hydraultryck från inloppsporten 2. I slidens andra ände är anordnad en andra kammare 10. Den andra kammaren 10 står i förbindelse med ett lastkännande tryck via en kanal 11 från manöverventilernas slider 6 a-d. I den andra kammaren 10 är anordnad en fjäder 12, exempelvis en spiralfjäder, som anligger med sin ena ände mot kammarens 12 insida och andra änden mot ventilhuset. Med hjälp av fjäderns 12 förspänning trycks sliden 8 i riktning mot den första kammaren 9, dvs i pilens A riktning, mot ett första ändläge. lnloppsporten 2 står via prioritetsventilen 7 i förbindelse med manöverventilerna 6a - d via en kanal 13 med en första strypning 14. Det lastkännande tryckets kanal 11 är anordnad med en förbindelse med tanken T via en kanal 15 med en andra strypning 16.Referring to the figures, a valve according to the invention comprises a one-piece valve housing 1 with an inlet port 2 connected to a hydraulic pump (P) with fixed or variable displacement, an outlet port 3 connected to a hydraulic tank (T), an outlet port 4 connected to that valve 5: 1 which controls functions of a consumer, for example a crane, and, in this exemplary embodiment, outlet for four consumers 5: 2a - 5: 2d with four identical control valves 6 a - d for controlling, for example, support legs, bank displacement and similar functions. The valve can be adapted to the requirements placed on its functions in addition to, for example, support legs and bank displacement, by more control valves can be connected to the valve housing 1. The inlet port 2 is connected to a priority valve 7 integrated in the valve housing 1 in which a spring-loaded slide 8, the so-called priority slide, is located. ll (- \ Dainrü \ 1 1 fl. \ 1 101 flfi G fi ñQEHYÅ fi R1 flfi nv¶ Ann »nian 10 15 20 25 30 35 n .se ou 525 555 s one end of the slide 8 is arranged a first chamber 9 for building up a hydraulic pressure from the inlet port 2. At the other end of the slide a second chamber 10 is arranged. The second chamber 10 communicates with a load-sensing pressure via a channel 11 from the slide 6 ad of the control valves. By means of the spring bias of the spring 12, the slide 8 is pressed in the direction of the first chamber 9, i.e. in the direction of the arrow A, towards a first end position. the control valves 6a - d via a channel 13 with a first choke 14. The channel 11 of the load sensing pressure is arranged with a connection to the tank T via a channel 15 with a second choke 16.
Sliderna i manöverventilerna 6a - d är anordnade med ett första flödesspàr 17 med en ökande storlek för att succesivt öppna flödesvägen till en av förbrukaren 5:2a - 5:2d , exempelvis stödbenet. Manöverventilernas 6a - d slider är även utrustade med ett andra flödesspâr 18 vilket står i förbindelse med den andra kammaren 10 i prioritetsventilen 7.The slides in the control valves 6a - d are arranged with a first fate track 17 with an increasing size to successively open the flow path to one of the consumer 5: 2a - 5: 2d, for example the support leg. The slides of the control valves 6a - d are also equipped with a second flow groove 18 which communicates with the second chamber 10 in the priority valve 7.
När systemet är trycksatt är inloppet 2 förbundet med kanalen 13. När pumpen P startas, och manöverventilen 6a - 6d ej manövreras, leds hydraulflödet in från pumpen P via inloppet 2 till den första kammaren 9 i prioritetsventilen 7 varvid trycket i kammaren 9 stiger. Det i den andra kammaren 10 befintliga trycket från det lastkännande tryckets kanal 11 dräneras samtidigt till tanken via den andra strypningen 16. När trycket i den första kammaren 9 blir högre än den i den andra kammaren 10 anordnade fjäderns 12 förspänning, förskjuts prioritetssliden 8 till ett andra ändläge varvid lnloppets 2 förbindelse med kanalen 13 stängs. Detta medför att inloppet 2 förbinds med den port 4 som är ansluten till den ventil 5:1 som styr kranens funktioner varvid hela pumpflödet går till kranens ventil 5:1.When the system is pressurized, the inlet 2 is connected to the channel 13. When the pump P is started, and the control valve 6a - 6d is not operated, the hydraulic flow is led in from the pump P via the inlet 2 to the first chamber 9 in the priority valve 7, the pressure in the chamber 9 rising. The pressure present in the second chamber 10 from the channel 11 of the load sensing pressure is simultaneously drained to the tank via the second choke 16. When the pressure in the first chamber 9 becomes higher than the bias of the spring 12 arranged in the second chamber 10, the priority slide 8 is displaced to a second end position whereby the connection of the inlet 2 to the channel 13 is closed. This means that the inlet 2 is connected to the port 4 which is connected to the valve 5: 1 which controls the functions of the tap, whereby the entire pump flow goes to the valve 5: 1 of the tap.
När manöverventilen 6a - 6d ska manövreras, dvs den ventil som styr förbrukarens 5:2a - 5:2d funktioner, exempelvis stödbenet, görs en ventilutstyrning, dvs manöverventilens slid 6a förskjuts i riktning med pilen A i figur 1. Det i sliden anordnade flödesspåret 17 öppnas succesivt varvid hydraulflödet gradvis ökar till stödbenet. Samtidigt öppnas det andra flödesspåret 18 succesivt för ett gradvis ökande flöde till kanalen 11 för det lastkännade trycket. Detta medför att trycket i den andra kammaren 10 ökar varvid prioritetssliden 8 förskjuts till ett mittre läge där trycket i kanalen 13 motsvarar det totala trycket av fjäderns 12 förspänning och trycket i den andra kammaren 10. Med prioritetssliden 8 i detta läge kan förbrukaren 5:2a - 5:2d, i detta exempel stödbenet, köras på önskat sätt med erforderligt flöde, oberoende av vilket tryck som behövs, samtidigt som det resterande flödet leds via utloppsporten 4 till kranventilen 5.When the control valve 6a - 6d is to be operated, ie the valve that controls the consumer's 5: 2a - 5: 2d functions, for example the support leg, a valve control is made, ie the control valve slide 6a is displaced in the direction of arrow A in Figure 1. The flow groove 17 arranged in the slide gradually opens, whereby the hydraulic flow gradually increases to the support leg. At the same time, the second flow groove 18 is successively opened for a gradually increasing flow to the channel 11 for the load-sensing pressure. This causes the pressure in the second chamber 10 to increase, the priority slide 8 being displaced to a central position where the pressure in the channel 13 corresponds to the total pressure of the spring 12 bias and the pressure in the second chamber 10. With the priority slide 8 in this position the consumer can 5: 2a 5: 2d, in this example the support leg, is run in the desired manner with the required flow, regardless of the pressure required, while the remaining flow is led via the outlet port 4 to the tap valve 5.
För att undvika att trycket direkt stiger till maximal nivà i kanalen 11 för det lastkännande trycket vid små ventilutstyrningar, är anordnad en dränering 19 till tanken T vid den andra strypningen 16. Dräneringen 19 ger ett visst flöde från andra flödesspåret 18 hos KÅD-:tanfl 1 1 fl_\ 1 101 flfififlflfilflflåflífl Rhavf finn 10 15 .nu n. 525 555 H 4 manöverventilens slid 6a - 6d till tanken T och därmed ett önskat tryckfall innan trycket når den andra kammaren 10. 6d är så utformade att vid stora ventilutstyrningar stängs dräneringen 19 vid den andra strypningen 16 varvid den första Manöverventilernas slider 6a - strypning 14 har störst inverkan eftersom huvuddelen av flödet passerar genom kanalen 13.In order to avoid that the pressure rises directly to the maximum level in the channel 11 for the load sensing pressure in small valve equipment, a drainage 19 is arranged to the tank T at the second throttle 16. The drainage 19 provides a certain flow from the second flow groove 18 of the KÅD-: tan fl 1 1 fl_ \ 1 101 flfififlflfi l flfl å fl í fl Rhavf finn 10 15 .nu n. 525 555 H 4 the control valve slide 6a - 6d to the tank T and thus a desired pressure drop before the pressure reaches the second chamber 10. 6d are designed so that in the case of large valve devices the drainage is closed 19 at the second throttle 16, the slider 6a - throttle 14 of the first Control Valves having the greatest impact since the main part of the flow passes through the channel 13.
Storleken pà denna första strypning 14 kan anpassas till att ge ett begränsat maximalt flöde vid stora ventilutstyrningar. Detta kan vara önskvärt för att ge en mjukare reglering av förbrukarna 5:2a - 5:2d utan tvära rörelser. Prioritetssliden 8 reglerar tryckfallet över strypningen 14 till ett konstant värde varvid detta maximala flöde blir lastoberoende, dvs stödbenet, i detta exempel, håller en konstant hastighet vid manövreringen oberoende av belastningen.The size of this first throttle 14 can be adapted to provide a limited maximum flow for large valve devices. This may be desirable to provide a smoother regulation of consumers 5: 2a - 5: 2d without sharp movements. The priority slide 8 regulates the pressure drop across the choke 14 to a constant value at which this maximum flow becomes load independent, ie the support leg, in this example, maintains a constant speed during operation regardless of the load.
Den föreliggande uppfinningen är ej begränsad till det ovan beskrivna och pà ritningarna visade utan kan ändra och modifieras på en rad olika sätt inom ramen för den i de efterföljande patentkraven angivna uppfinningstanken.The present invention is not limited to that described above and shown in the drawings, but may be modified and modified in a variety of ways within the scope of the inventive concept set forth in the appended claims.
L(~\Datnnt\1 1fi_\1 1 H1 ÛÛRHDQCVYQHFM Rhsvf dnrL (~ \ Datnnt \ 1 1fi_ \ 1 1 H1 ÛÛRHDQCVYQHFM Rhsvf dnr
Claims (8)
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0301777A SE525355C2 (en) | 2003-06-19 | 2003-06-19 | Outriggers valve |
EP04749000A EP1633987B1 (en) | 2003-06-19 | 2004-06-16 | Support leg valve |
CNB2004800170115A CN100480517C (en) | 2003-06-19 | 2004-06-16 | Support leg valve |
PCT/SE2004/000951 WO2004111467A1 (en) | 2003-06-19 | 2004-06-16 | Support leg valve |
AT04749000T ATE548569T1 (en) | 2003-06-19 | 2004-06-16 | SUPPORT FOOT VALVE |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0301777A SE525355C2 (en) | 2003-06-19 | 2003-06-19 | Outriggers valve |
Publications (3)
Publication Number | Publication Date |
---|---|
SE0301777D0 SE0301777D0 (en) | 2003-06-19 |
SE0301777L SE0301777L (en) | 2004-12-20 |
SE525355C2 true SE525355C2 (en) | 2005-02-08 |
Family
ID=27607343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE0301777A SE525355C2 (en) | 2003-06-19 | 2003-06-19 | Outriggers valve |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1633987B1 (en) |
CN (1) | CN100480517C (en) |
AT (1) | ATE548569T1 (en) |
SE (1) | SE525355C2 (en) |
WO (1) | WO2004111467A1 (en) |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1988006114A1 (en) * | 1987-02-19 | 1988-08-25 | Zahnradfabrik Friedrichshafen Ag | Hydraulic device with regulable pump |
CN2224944Y (en) * | 1994-01-24 | 1996-04-17 | 奉化豪发液压气动有限公司 | Hydraulic multi-channel switching valve |
IT234141Y1 (en) * | 1994-10-05 | 2000-02-23 | Velp Scient Srl | CONTROLLED STEAM FLOW DISTILLATION EQUIPMENT |
GB9425273D0 (en) * | 1994-12-14 | 1995-02-08 | Trinova Ltd | Hydraulic control system |
IT1292919B1 (en) * | 1997-05-13 | 1999-02-11 | Mita Oleodinamica Spa | DISTRIBUTOR FOR A CONTROLLED POSITION AND EFFORT HYDRAULIC LIFT FOR TRACTORS AND AGRICULTURAL MACHINES. |
CN1274810A (en) * | 1999-05-21 | 2000-11-29 | 株式会社岛津制作所 | Multi-valve device |
CN2504157Y (en) * | 2001-07-02 | 2002-08-07 | 温州市液压件厂 | Hydraulic multiroute valve of crane truck |
-
2003
- 2003-06-19 SE SE0301777A patent/SE525355C2/en not_active IP Right Cessation
-
2004
- 2004-06-16 AT AT04749000T patent/ATE548569T1/en active
- 2004-06-16 WO PCT/SE2004/000951 patent/WO2004111467A1/en active Application Filing
- 2004-06-16 CN CNB2004800170115A patent/CN100480517C/en not_active Expired - Fee Related
- 2004-06-16 EP EP04749000A patent/EP1633987B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1633987A1 (en) | 2006-03-15 |
ATE548569T1 (en) | 2012-03-15 |
WO2004111467A1 (en) | 2004-12-23 |
CN100480517C (en) | 2009-04-22 |
CN1809698A (en) | 2006-07-26 |
SE0301777D0 (en) | 2003-06-19 |
EP1633987B1 (en) | 2012-03-07 |
SE0301777L (en) | 2004-12-20 |
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