EP0816690B1 - Hydraulische Steuervorrichtung - Google Patents
Hydraulische Steuervorrichtung Download PDFInfo
- Publication number
- EP0816690B1 EP0816690B1 EP97110054A EP97110054A EP0816690B1 EP 0816690 B1 EP0816690 B1 EP 0816690B1 EP 97110054 A EP97110054 A EP 97110054A EP 97110054 A EP97110054 A EP 97110054A EP 0816690 B1 EP0816690 B1 EP 0816690B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pressure
- line
- throttle
- valve
- load
- 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 - Lifetime
Links
- 238000013016 damping Methods 0.000 claims abstract description 19
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 3
- 230000010355 oscillation Effects 0.000 claims 2
- 230000001105 regulatory effect Effects 0.000 claims 2
- 230000000694 effects Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000036316 preload Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012913 prioritisation Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
-
- 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
- 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control valve
- F15B2211/3053—In combination with a pressure compensating valve
- F15B2211/30535—In combination with a pressure compensating valve the pressure compensating valve is arranged between pressure source and 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
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/3056—Assemblies of multiple valves
- F15B2211/3059—Assemblies of multiple valves having multiple valves for multiple output members
- F15B2211/30595—Assemblies of multiple valves having multiple valves for multiple output members with additional valves between the groups of valves for multiple 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
- F15B2211/30—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
- F15B2211/35—Directional control combined with flow control
- F15B2211/353—Flow control by regulating means in return line, i.e. meter-out 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
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant 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
- F15B2211/405—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
- F15B2211/426—Flow control characterised by the type of actuation electrically or electronically
-
- 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
- F15B2211/40—Flow control
- F15B2211/47—Flow control in one direction only
- F15B2211/473—Flow control in one direction only without restriction in the reverse direction
-
- 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
- F15B2211/60—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
- F15B2211/70—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
Definitions
- the invention relates to a hydraulic control device in the preamble of the claim 1 specified Art.
- the invention has for its object a hydraulic control device of the beginning to create the type mentioned, in a simple constructional way the speed of movement selected consumer can be individually limited and still Pressure vibrations in the system can be dampened effectively and quickly.
- the control device gives the hoist an expanded range of application and has one with regard to pressure fluctuations or Pressure vibrations stable operating behavior.
- the quantity limitation occurring when the throttle is engaged adapt exactly to the respective application.
- the switching valve provides the quantity-limiting in its blocking position Throttling effect. If the switching valve is switched to its open position, then the throttle is bypassed and the pressure medium goes through the line loop, where the maximum quantity controlled by the three-way controller is the maximum Allows the speed of the consumer downstream of the throttle Every consumer becomes load-independent via the inlet controller of its proportional directional control valve the just required amount, which is after the adjustment of the proportional directional control valve judges.
- the inlet regulator maintains the pressure difference via the proportional directional control valve constant regardless of load. Both when engaging the throttle The maximum usable pressure is also available if the throttle is bypassed.
- the intermediate plate is useful according to claim 4 installed downstream of the housing or housings in the battery assembly, the or whose consumers do not need to limit the speed of movement.
- An intermediate plate can or can be provided in front of several housings multiple intermediate plates between housings are installed to accommodate individual consumers to be able to control individually.
- the intermediate plates differentiate intended chokes in their throttle passage sizes.
- the check valve with higher preload in the closing direction Expediently opens in the direction in which the three-way controller is located its control cycle reduces the pressure in the pump line, reducing the preload this check valve also helps to dampen pressure fluctuations.
- the other check valve enables the other check valve to be biased only slightly or not at all largely undamped response of the three-way controller in the closing direction (increase of the pressure in the pump line).
- the switching valve with which the throttle in the pump line can be bypassed, is expediently actuated magnetically, on the control side during operation. However, it is also possible to change the switching valve depending on the load pressure and e.g. hydraulic to operate.
- FIG. 1 shows a block diagram of a hydraulic control device S which is expediently designed for a hoist such as a mobile crane with which, for example a lifting cage is manipulated even in special application situations.
- the control device S has individual, block-shaped housings 1, 3 and at least one Intermediate plate 2, which is combined in a battery assembly 4 (control block) are.
- Proportional directional control valves P1, P2, P3 are of conventional construction in the housings 1 with their inlet regulators Z and other components.
- the housing 1, 3 and the intermediate plates 2 are screwed together on their connection sides, so that all by means of the proportional directional control valves P1, P2, P3 (and if necessary further consumer V (not shown) to be supplied, e.g. Hydraulic motors or Hydraulic cylinder, r are connected to a common pump line P.
- the pressure supply takes place, for example, via a pump 5, e.g.
- Each proportional directional control valve P1, P2, P3 is connected to the inlet controller Z containing connecting line 7 connected to the pump line P. From the return line R lead return lines 8 to the proportional directional control valves P1, P2, P3. Each consumer V is over two (or only one) working lines A, B connected to the corresponding proportional directional control valve P1, P2, P3 and is used to move a load L.
- the inlet regulator Z is a two-way regulator, which acts as a pressure compensator via a control line 9 in the closing direction with the on the proportional directional control valve P1 in the connecting line 7 pending pressure and in the opening direction via a control line 10 with the one of the working lines A, B derived load pressure and acted upon by a control spring 11 becomes.
- the control line 10 is via a control line branch 12 and a Shuttle valve 13 connected to a common load pressure control line 14 which runs through the housing 1, 3 and the intermediate plate 2. Because of the shuttle valves 13, the load pressure control line 14 carries the highest load pressure of a consumer.
- a three-way controller D of conventional design is arranged, one as a pressure compensator Working control piston 15 has the aperture of the passage of a connecting channel 16 monitored between the pump line P and the return line R. and depending on its current position, more or less or none at all Drain the pressure medium from the pump line P into the return line R.
- the control piston 15 is in the opening direction of the three-way controller (to reduce the pressure in the Pump line P) is acted upon by the pressure in the pump line via a control line 17 (Opening side of the three-way controller).
- the control piston 15 On the closing side and in the closing direction of the three-way controller, on the other hand, the control piston 15 is controlled by a control spring 18 and pressurized in a control line 19 via a damping system C is connected to the load pressure control line 14.
- a damping throttle 20 is contained, which by means of two opposing Check valves 21 and 23 can be bypassed in each flow direction. Between the damping throttle 20 and the nearest shuttle valve 13 in the Load pressure control line 14, an aperture 24 is provided. That in the opening direction of the Three-way regulator D (reducing the pressure in the pump line P) opening a check valve 21 is biased with a spring 22 in the closing direction and that higher than that other check valve 23, which in the closing direction may be low or at all is not biased.
- a quantity-limiting throttle 25 is located in the intermediate plate 2 in the pump line P. arranged, the passage cross section is expediently adjustable.
- the throttle 25 is bypassed in the pump line P by a line loop 26 in which a Switching valve 27, e.g. a 2/2-way solenoid valve is included, which by means of a Switching magnet 28 between that shown in Fig.1 and held by a spring Locking position and a passage position a is adjustable, in which the throttle 25 bypassed becomes.
- the switching valve 27 is in the embodiment shown with a check valve (Seat valve, leakage-free) equipped that in the direction of flow to the proportional directional control valves P2, P3 blocks.
- the proportional directional control valve P1 in Housing 1 is e.g. upstream of the intermediate plate 2 and is through the throttle 25 or the switching valve 27 is not affected.
- the proportional directional control valve receives P1 the according to the load pressure in the control line 19 from Three-way controller D assigned volume flow, with the maximum pressure.
- the Movement speed of the one controlled with the proportional directional control valve P1 Consumer depends on the deflection of the proportional directional control valve P1.
- the movement speed plugged into the directional control valve P1 becomes independent of the load maintained by the inflow regulator Z.
- the proportional directional control valves P2 and P3, receive via the throttle 25 a volume-reduced volume flow, whereby the maximum reduced quantity after the setting of the throttle 25 is aimed.
- the maximum pressure can also be used.
- the speeds of movement of consumers, which are controlled by the proportional directional control valve P2, P3 not only from the deflection of the respective proportional directional control valve P2 or P3 dependent, but limited by the throttle 25. With consumers can therefore also handle large loads (the maximum pressure can be used) over the maximum Speed to be taken into account, the load torque limit moves slowly without endangering the safety of the system or the hoist.
- the throttle 25 is bypassed and also stands for the proportional directional control valves P2 and P3 the maximum Volume flow available.
- the switching position a of the switching valve is for the Proportional directional control valves P2 and P3 the maximum pressure in the system can be used to be able to move even large loads within the load torque limit.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Automation & Control Theory (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Valve Device For Special Equipments (AREA)
- Control And Safety Of Cranes (AREA)
Description
Claims (6)
- Hydraulische Steuervorrichtung (S), insbesondere für ein Hebezeug wie einen Mobilkran, für eine Gruppe von Verbrauchern (V), die parallel über je ein Proportional-Wegesteuerventil (P1, P2, P3) an eine Pumpenleitung (P) und eine Rücklaufleitung (R) angeschlossen sind, mit einem stromauf jedes Proportional-Wegesteuerventils in einer Anschlußleitung (7) angeordneten Zulaufregler (Z), der vom Lastdruck des zugehörigen Verbrauchers entgegengesetzt zum Zulaufdruck des Proportional-Wegesteuerventils beaufschlagt ist, mit einem allen Verbrauchern (V) gemeinsamen Dreiwegeregler (D) zwischen der Pumpenleitung (P) und der Rücklaufleitung (R), der vom Pumpendruck und dem höchsten Lastdruck steuerbar ist, und mit einem an der Schließseite des Dreiwegereglers (D) in einer Lastdruck-Steuerleitung (14) angeordneten Dämpfungssystem (C) für Druckschwingungen, dadurch gekennzeichnet, daß in der Pumpenleitung (P) zwischen dem Dreiwegeregler (D) und wenigstens einem Proportional-Wegesteuerventil (P1, P2, P3) der Verbrauchergruppe eine wahlweise umgehbare, mengenbegrenzende Drossel (25) angeordnet ist.
- Hydraulische Steuervorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Drossel (25) verstellbar ausgebildet ist.
- Hydraulische Steuervorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß in der Pumpenleitung (P) eine die Drossel (25) umgehende Leitungsschleife (26) mit einem Schaltventil (27), vorzugsweise einem 2/2-Wege-Magnetschaltventil, angeordnet ist.
- Hydraulische Steuervorrichtung nach wenigstens einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß jedes Proportional-Wegesteuerventil (P1, P2, P3) mit seinem Zulaufregler (Z) in einem blockförmigen Gehäuse (1) enthalten ist, daß die Gehäuse (1) mit ihren Anschlußseiten batterieartig aneinandergesetzt sind, daß die Drossel (25) mit dem Schaltventil (27) in einer Zwischenplatte (2) enthalten ist, und daß die Zwischenplatte (2) wahlweise an der Anschlußseite jedes Gehäuses (1) anbringbar ist.
- Hydraulische Steuervorrichtung nach wenigstens einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß der Dreiwegeregler (D) einen als Druckwaage wirkenden Regelkolben (15) aufweist, der an der Öffnungsseite und in Öffnungsrichtung des Dreiwegereglers (D) vom Pumpendruck und an der Schließseite und in Schließrichtung vom höchsten Lastdruck eines der Verbraucher (V) sowie einer Regelfeder (18) beaufschlagbar ist, und daß das an der Schließseite des Dreiwegereglers (10) in der Lastdruck-Steuerleitung (14) angeordnete Dämpfungssystem (C) für Druckschwingungen aus einer Dämpfdrossel (20) und zwei gegensinnig die Dämpfdrossel (20) umgehenden Rückschlagventilen (21, 23) besteht, von denen das eine Rückschlagventil (21), vorzugsweise das in Öffnungsrichtung des Dreiwegereglers (D) öffnende Rückschlagventil, höher im Schließsinn vorgespannt ist als das andere Rückschlagventil (23).
- Hydraulische Steuervorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß an der dem Dreiwegeregler (D) abgewandten Seite des Dämpfungssystems (C) in der Lastdruck-Steuerleitung (14) eine Blende (24) vorgesehen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29611526U | 1996-07-02 | ||
DE29611526U DE29611526U1 (de) | 1996-07-02 | 1996-07-02 | Hydraulische Steuervorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0816690A1 EP0816690A1 (de) | 1998-01-07 |
EP0816690B1 true EP0816690B1 (de) | 2000-09-27 |
Family
ID=8025960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97110054A Expired - Lifetime EP0816690B1 (de) | 1996-07-02 | 1997-06-19 | Hydraulische Steuervorrichtung |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0816690B1 (de) |
AT (1) | ATE196672T1 (de) |
DE (2) | DE29611526U1 (de) |
DK (1) | DK0816690T3 (de) |
ES (1) | ES2152597T3 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102358571A (zh) * | 2011-10-19 | 2012-02-22 | 四川长江液压件有限责任公司 | 双泵负荷液压传感系统 |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10034431A1 (de) * | 2000-07-14 | 2002-07-25 | Juergen Schenk | Hydrauliksystem für ein Arbeitsgerät mit einem Sonderverbraucher |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE8803181D0 (sv) * | 1988-09-09 | 1988-09-09 | Atlas Copco Ab | Hydraulic driving system with a priority function for hydraulic motors |
DE4243973C1 (de) * | 1992-12-23 | 1994-07-07 | Heilmeier & Weinlein | Hydraulische Steuervorrichtung |
-
1996
- 1996-07-02 DE DE29611526U patent/DE29611526U1/de not_active Expired - Lifetime
-
1997
- 1997-06-19 ES ES97110054T patent/ES2152597T3/es not_active Expired - Lifetime
- 1997-06-19 AT AT97110054T patent/ATE196672T1/de not_active IP Right Cessation
- 1997-06-19 EP EP97110054A patent/EP0816690B1/de not_active Expired - Lifetime
- 1997-06-19 DK DK97110054T patent/DK0816690T3/da active
- 1997-06-19 DE DE59702396T patent/DE59702396D1/de not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102358571A (zh) * | 2011-10-19 | 2012-02-22 | 四川长江液压件有限责任公司 | 双泵负荷液压传感系统 |
CN102358571B (zh) * | 2011-10-19 | 2013-07-31 | 四川长江液压件有限责任公司 | 双泵负荷液压传感系统 |
Also Published As
Publication number | Publication date |
---|---|
DE29611526U1 (de) | 1996-09-05 |
DK0816690T3 (da) | 2001-01-08 |
ATE196672T1 (de) | 2000-10-15 |
DE59702396D1 (de) | 2000-11-02 |
ES2152597T3 (es) | 2001-02-01 |
EP0816690A1 (de) | 1998-01-07 |
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