EP0943057B1 - Wegeventil zur lastunabhängigen steuerung eines hydraulischen verbrauchers hinsichtlich richtung und geschwindigkeit - Google Patents
Wegeventil zur lastunabhängigen steuerung eines hydraulischen verbrauchers hinsichtlich richtung und geschwindigkeit Download PDFInfo
- Publication number
- EP0943057B1 EP0943057B1 EP97953751A EP97953751A EP0943057B1 EP 0943057 B1 EP0943057 B1 EP 0943057B1 EP 97953751 A EP97953751 A EP 97953751A EP 97953751 A EP97953751 A EP 97953751A EP 0943057 B1 EP0943057 B1 EP 0943057B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- brake piston
- load
- bore
- spool
- 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
- 230000007935 neutral effect Effects 0.000 claims abstract description 23
- 238000006073 displacement reaction Methods 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000004308 accommodation Effects 0.000 claims 4
- 230000000694 effects Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000033001 locomotion Effects 0.000 description 4
- 230000011664 signaling Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
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
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/05—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
-
- 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
- F15B13/0401—Valve members; Fluid interconnections therefor
- F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
Definitions
- the invention is based on a directional valve that is independent of the load Control of a hydraulic consumer with regard to Direction and speed is suitable and that Features from the preamble of claim 1.
- Such a directional control valve is known from DE-OS 23 42 498. It has a control slide, which in a sliding bore of a Valve housing is axially displaceable and in a neutral position two consumer chambers on the slide bore to one Blocked inlet chamber and in two working positions either side of the neutral position either one of the two Consumer chambers with one inlet chamber and the other Connects consumer chamber with a return chamber.
- a brake piston is arranged, the one Flow path between a consumer chamber and one Return chamber opens only so far that the hydraulic Consumers do not run ahead of the amount of fluid flowing to them can that there is no lack of filling in the lead between him and the other consumer chamber emerges.
- the brake piston in the sense of a reduction in the opening cross section of the Flow paths from a spring and in the sense of an enlargement the opening cross-section of the pressure in the other consumer chamber applied.
- the control slide has a slide longitudinal bore, which has a Cross hole is connectable to the other consumer chamber and into a pressure space between the bottom of a recording space and the brake piston located in this receiving space empties.
- the longitudinal bore runs eccentrically in the control spool.
- To pressurize the other brake piston another eccentrically extending longitudinal slide bore in the control spool and another cross hole.
- the directional control valve runs centrally closed on both sides by the control spool Longitudinal hole, of the three cross holes or cross hole stars lead to the outside of the spool.
- a first one The cross hole star is in the neutral position of the Control spool at a short distance from a consumer chamber between this and the inlet chamber.
- the second Cross bore star is a short distance from the other Consumer chamber between this and the inlet chamber.
- a third transverse bore finally opens into an annular groove on the Outside of the control spool, which is in the neutral position of the Control spool symmetrical to the mouth of the load signaling channel lies and in each position of the control slide the slide longitudinal bore connects to the load reporting channel.
- the invention has for its object to provide a directional valve the features from the preamble of claim 1, ie a directional valve to develop with brake pistons in the spool so that it is constructed more simply and is cheaper to manufacture is.
- This task is performed on a directional valve with the characteristics the preamble of claim 1 solved according to the invention, that there is a single slide longitudinal bore of the one pressure chamber on one brake piston to the other pressure chamber on the other Brake piston extends and that when the Control spool from the neutral position depending on the direction of displacement either with one consumer chamber or with the other Chamber of consumers is connectable.
- the spool is simplified and made its manufacture cheaper.
- the invention lies in the surprising finding that the control of a hydraulic Consumer is not affected if besides that Brake piston, the opening cross section of the flow path between a consumer chamber and a return chamber controls and pressurized in the other consumer chamber the other brake piston is also the pressure in the other Chamber of consumers is exposed. The other brake piston is lifted from the bottom of the mounting hole, the other The return chamber remains through the spool to the other Chamber of consumers closed.
- the load reporting channel is also in a directional valve according to the invention in the sense of a short axial construction of the directional valve advantageously at one point to the side of all working chambers open towards the slide hole.
- a brake piston with a load reporting longitudinal bore, the to the pressure chamber in front of one end of this brake piston open and to the spring chamber in front of the other end of this Brake piston is closed and via the slide longitudinal bore with the mouth of the load signaling channel in the slide hole communicates.
- connection between the load reporting longitudinal bore in one brake piston and the load signaling channel expediently via a transverse bore in the brake piston and via a transverse bore in the jacket surrounding the brake piston Control spool manufactured.
- An axial and / or a peripheral offset between the two cross holes is advantageous according to claim 4 compensated by an annular groove that is located between the brake piston and the jacket of the control spool preferably on the Outside of the brake piston.
- each brake piston has an annular groove in the flow path between the consumer chamber and the return chamber lies and on each of its two sides there is a piston collar located.
- the piston crown on the spring chamber side has a considerable length, around the connection between the load reporting longitudinal hole and to be able to establish the load reporting channel.
- the other brake piston on its spring chamber side Piston collar as long as the brake piston with the Load reporting longitudinal bore formed. An unnecessary extension the spool is avoided.
- the spring chamber is behind the brake piston the load reporting longitudinal bore via one inside the brake piston extending channel to a return chamber can be relieved. in principle this is also possible with the other brake piston.
- FIG. 1 extends through a valve housing 10 a slide bore 11, which are constant throughout Has diameter and around which are spaced apart from each other Working chambers 12, 13, 14, 15 and 16 and control chambers 17, 18 and 19 circulate.
- the working chambers 12 and 16 the the most distant from each other are return chambers, from each of which runs out of a return channel 20, each through an arrow is indicated. Both return channels are general known merged outside of the valve housing and connectable with a tank.
- the inlet chamber 14 via a pressure channel 21, which is also shown in FIG an arrow is indicated, pressure medium from a hydraulic pump is feedable.
- a first consumer chamber 13 and between the return chamber 16 and the inlet chamber 14 a second consumer chamber 15.
- Each consumer chamber is over a consumer channel with a connection one not closer shown hydraulic consumer connectable.
- the three control chambers 17, 18 and 19 are located on the side of the Return chamber 12.
- the middle control chamber 18 is here as Designated load reporting chamber and is via a load reporting channel 22 with a control room on a load sensing controller of a variable displacement pump or with a control room one in the bypass to one Constant pressure pump arranged connectable, via the one Part of the volume of pressure medium delivered by the constant pump Tank is returned.
- the two control chambers 17 and 19 are each with a pressure relief valve, not shown connected.
- a control slide 30 guided axially movable.
- This has a circumferential Annular groove 31, which is relatively deep in the radial direction and in Axial direction is wider than the inlet chamber 14 and the in the neutral position of the control slide shown in Figure 1 30 in a central position with respect to the inlet chamber 14 is located. From the annular groove 31 go axially to both sides to and over the circumference of the spool 30 distributed fine control grooves 32 from the neutral position of the spool 30 each at a short distance from the consumer chamber 13 or 15 ends.
- a receiving space 33 or 34 is introduced.
- the two floors 35 of the two receiving spaces 33 and 34 have a distance from each other that is approximately the clear distance ie the distance between the axial boundary walls on the inlet chamber side the consumer chambers 13 and 15 correspond to each other.
- a slide longitudinal bore 36 therethrough.
- a transverse bore 37 Just in front of you Bottom 35 opens into the longitudinal slide bore 36, a transverse bore 37, the 32 between two fine control grooves the outside of the spool 30 goes out. In its neutral position are both transverse holes 37 through the wall of the Slider bore 11 closed.
- the Diameter is smaller than the diameter of the radial bores 38 and the outside in a flat annular groove 40 of the spool 30 open in the axial direction from the radial bores 39 extends outwards and ensures that the radial bores 39 when the control spool moves from the neutral position in one direction always to Return chamber 12 and 16 are open.
- the annular groove 40 on the Return chamber 12 is axially longer than the other annular groove 40 and makes a connection in the neutral position of the control spool between the control chamber 17 and the return chamber 12 ago.
- another ring groove 41 screwed in the Neutral position of the control spool all three control chambers 17, 18 and 19 bridged.
- the piston section 42 between the ring grooves 40 and 41 is therefore axially shorter than the control chamber 17. It is in the neutral position of the spool 30 thus an open connection between the return chamber 12 and the three control chambers 17, 18 and 19, in which accordingly in the neutral position of the control slide 30, the low pressure is pending, which prevails in the return channel 20.
- A is located in the receiving space 33 of the control slide 30 Brake piston 51 and in the receiving space 34 a brake piston 52. Both Brake pistons are axial within the respective receiving space slidable and are supported by a helical compression spring 53 on a locking screw closing the respective receiving space 54 supports, towards the bottom 35 of the respective recording room too charged.
- Every brake piston has an annular groove 57, between two piston sections 55 and 56 the first radial bores 38 with the second radial bores 39 of the control slide 30 are connectable. The distance of the Annular groove 57 from the bottom 35 of a receiving space The front side of a brake piston is in both brake pistons equal.
- a pressure chamber 58 is between the piston section 55 the floor 35 of a recording room and the respective Brake piston to the ring groove 57 completed.
- the slide longitudinal bore 36 opens into both pressure chambers 58.
- the brake pistons 51 and 52 are thus from the prevailing in the slide longitudinal bore 36 Pressure can be applied against the helical compression spring 53.
- the brake piston 52 is shorter than the brake piston 51.
- the receiving space 34 is also shorter than the receiving space 33.
- the brake piston 51 is therefore longer than the brake piston 52 because it is used to move between the slide longitudinal bore 36 and the annular groove running around the outside of the slide 41 to establish a connection. He owns for this purpose centrally an axially extending blind bore 65, which at its the bottom 35 of the receiving space 30 facing end face open and extends into the piston section 56.
- This piston section 56 of the brake piston 51 is longer than the piston section 56 of the other brake piston 52, which makes the larger Length of the brake piston 51 is conditional.
- a return chamber 12 or 16 can Bores in the respective brake pistons 51 and 52 compensate of the pressure medium volume contained in a spring chamber occur.
- the brake piston 52 has a spring chamber 72 open axial blind bore 73 and several outgoing from this radial bores 74 running in the piston section 56, which open out into a narrow annular groove 76 and in any position of the brake piston 52 to the second radial bores 39 of the Control spool 30 are open.
- the blind bore 73 is caught a ball 75, the one with unspecified Seat in the blind bore 73 forms a check valve, the the return chamber 16 opens to the spring chamber 72.
- the Brake piston 51 has to connect the spring chamber 72 with the Return chamber 12 the same short axial and central blind bore 73 like the brake piston 52 and a radial bore 74, which just outside the annular groove 57 into a narrow annular groove 76 opens at the brake piston and ends in front of the blind bore 65.
- An oblique bore runs between the bores 73 and 74 77.
- a ball 75 is again caught in the bore 73, that is part of a check valve that faces the spring chamber 72 opens.
- a choke is in turn by a notch in the seat of the Check valve formed.
- Each of the two control chambers 17 and 19 is not closer to one pressure relief valve shown connected.
- the two Pressure relief valves limit the pressure in these control chambers and can be set to different maximum pressures his.
- the control slide 30 is by means of two springs 80 in the Centered neutral and can be hydraulically in one or other direction to be shifted.
- control slide 30 In the neutral position shown, the control slide 30 are all working chambers cordoned off from each other.
- the cross holes 37, the slide longitudinal bore 36, the pressure chambers 58, the blind bore 65, the oblique bore 67, the annular groove 66, the transverse bore 68 and the three control chambers 17, 18 and 19 are for Return chamber 12 relieved of pressure.
- the brake pistons 51 and 52 are pressed by the compression springs 53 against the bottom 35 of the respective Recording room 33 and 34 pressed. It is now assumed that the spool in the view of Figure 1 to the left is moved. This is between the inlet chamber 14 and the consumer chamber 13 opened a measuring aperture, the opening cross section on the degree of displacement of the control spool 30 depends.
- One is opened to the consumer chamber 13 Cross bore 37 of the spool valve 30. While in the consumer chamber 13 the load pressure of the respective hydraulic Pending consumer, there is 14 pump pressure in the inlet chamber, of load sensing controls, within which the valve shown is used to make a certain difference in the height of 15 to 20 bar higher than the load pressure of the controlled hydraulic consumer or higher than the highest Load pressure of several hydraulic consumers controlled in parallel is. Via the open transverse bore 37 and the slide longitudinal bore 36 stands the prevailing in the consumer chamber 13 Load pressure in the pressure rooms 58 and presses Brake piston on the locking screws 54.
- the load pressure is over the blind bore 65, the transverse bore 67 and the annular groove 66 of the brake piston 51 and via the transverse bore 68 and the annular groove 41 in the control slide 30 is given in the control chamber 18, due to the displacement of the control spool 30 through the piston portion 42 of the control chamber 17 and the return chamber 12 separately and only with the control chamber 19 is connected. From the control chamber 18 Load pressure via the load reporting channel 22 to the control valve one Variable pump or connected to a constant pump in the bypass Pressure compensator are reported.
- the force of the compression springs 53 on the brake pistons 51 and 52 corresponds a pressure of e.g. 5 bar in the pressure rooms 58.
- a pressure e.g. 5 bar in the pressure rooms 58.
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Multiple-Way Valves (AREA)
- Sliding Valves (AREA)
- Safety Valves (AREA)
Description
- Figur 1
- in vereinfachter Darstellung einen Schnitt durch das Ausführungsbeispiel, der durch die Achse des Steuerschiebers geht, und
- Figur 2
- ein Schaltbild des Ausführungsbeispiels.
Claims (7)
- Wegeventil zur lastunabhängigen Steuerung eines hydraulischen Verbrauchers hinsichtlich Richtung und Geschwindigkeit mit einem in einer Schieberbohrung (11) eines Ventilgehäuses (10) axial verschiebbaren Steuerschieber (30), der in einer Neutralstellung zwei Verbraucherkammern (13, 15) zu einer Zulaufkammer (14) hin absperrt und in zwei Arbeitsstellungen wahlweise eine der beiden Verbraucherkammern (13, 15) mit einer Zulaufkammer (14) und die jeweils andere Verbraucherkammer (15, 13) mit einer Rücklaufkammer (12, 16) verbindet,
in dem in zwei sich einander gegenüberliegenden Aufnahmeräumen (33, 34) jeweils ein Bremskolben (51, 52) angeordnet ist, der im Sinne einer Vergrößerung des Öffnungsquerschnitts eines über den jeweiligen Aufnahmeraum (33, 34) von einer Verbraucherkammer (13, 15) zu einer Rücklaufkammer (12, 16) führenden Strömungspfads vom Druck in der anderen Verbraucherkammer (15, 13) und im Gegensinne von einer in einem Federraum (72) untergebrachten Feder (53) beaufschlagbar ist, und der eine Schieberlängsbohrung (36) aufweist, die mit der anderen Verbraucherkammer (15, 13) und mit einem Lastmeldekanal (22) des Ventilgehäuses (10) verbindbar ist und in einen Druckraum (58) zwischen dem Boden (35) eines Aufnahmeraums (33, 34) und dem sich in diesem Aufnahmeraum (33, 34) befindlichen Bremskolben (51, 52) mündet,
dadurch gekennzeichnet, daß sich die Schieberlängsbohrung (36) von dem einen Druckraum (58) am einen Bremskolben (51, 52) bis zum anderen Druckraum (58) am anderen Bremskolben (52, 51) erstreckt und daß die Schieberlängsbohrung (36) bei einer Verschiebung des Steuerschiebers (30) aus der Neutralstellung je nach Verschieberichtung entweder mit der einen Verbraucherkammer (13) oder mit der anderen Verbraucherkammer (15) verbindbar ist. - Wegeventil nach Anspruch 1, dadurch gekennzeichnet, daß der Lastmeldekanal (22) an einer Stelle seitlich aller Arbeitskammern (12, 13, 14, 15, 16) zur Schieberbohrung (11) hin offen ist, daß der eine Bremskolben (51) mit einer Lastmeldebohrung (65) versehen ist, die zu dem Druckraum (58) vor der einen Stirnseite des Bremskolbens (51) offen und zum Federraum (72) vor der anderen Stirnseite des Bremskolbens (51) verschlossen ist und über die die Schieberlängsbohrung (36) mit der Mündung (18) des Lastmeldekanals (22) in die Schieberbohrung (11) in Verbindung steht.
- Wegeventil nach Anspruch 2, dadurch gekennzeichnet, daß die Lastmeldebohrung (65) in dem einen Bremskolben (51) über eine Querbohrung (67) in dem Bremskolben (51) und über eine Querbohrung (68) im den Bremskolben (51) umgebenden Mantel des Steuerschiebers (30) mit dem Lastmeldekanal (22) verbunden ist.
- Wegeventil nach Anspruch 3, dadurch gekennzeichnet, daß sich im Bereich der Querbohrungen (67, 68) zwischen dem Bremskolben (51) und dem Mantel des Steuerschiebers (30) eine Ringnut (66) befindet, mit der ein axialer und ein peripheraler Versatz der Querbohrungen (67, 68) zueinander ausgleichbar ist.
- Wegeventil nach Anspruch 4, dadurch gekennzeichnet, daß sich die Ringnut (66) auf der Außenseite des Bremskolbens (51) befindet.
- Wegeventil nach einem der Ansprüche 2 bis 5, dadurch gekennzeichnet, daß der Bremskolben (51) mit der Lastmeldebohrung (65) federraumseitig länger als der andere Bremskolben (52) ausgebildet ist.
- Wegeventil nach einem der Ansprüche 2 bis 6, dadurch gekennzeichnet, daß der Federraum (72) hinter dem Bremskolben (51), der die Lastmeldebohrung (65) aufweist, über einen innerhalb des Bremskolbens (51) verlaufenden Kanal (73, 74, 77) zu einer Rücklaufkammer (12) entlastbar ist.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19651967 | 1996-12-13 | ||
| DE19651967A DE19651967A1 (de) | 1996-12-13 | 1996-12-13 | Wegeventil zur lastunabhängigen Steuerung eines hydraulischen Verbrauchers hinsichtlich Richtung und Geschwindigkeit |
| PCT/EP1997/006826 WO1998026186A1 (de) | 1996-12-13 | 1997-12-06 | Wegeventil zur lastunabhängigen steuerung eines hydraulischen verbrauchers hinsichtlich richtung und geschwindigkeit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0943057A1 EP0943057A1 (de) | 1999-09-22 |
| EP0943057B1 true EP0943057B1 (de) | 2003-05-02 |
Family
ID=7814662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97953751A Expired - Lifetime EP0943057B1 (de) | 1996-12-13 | 1997-12-06 | Wegeventil zur lastunabhängigen steuerung eines hydraulischen verbrauchers hinsichtlich richtung und geschwindigkeit |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US6179393B1 (de) |
| EP (1) | EP0943057B1 (de) |
| JP (1) | JP2001509235A (de) |
| AT (1) | ATE239174T1 (de) |
| DE (2) | DE19651967A1 (de) |
| WO (1) | WO1998026186A1 (de) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19735482B4 (de) | 1997-08-16 | 2006-08-10 | Bosch Rexroth Aktiengesellschaft | Hydraulisches System mit einem Differentialzylinder und einem Eilgangventil |
| DE19913277B4 (de) * | 1999-03-24 | 2007-11-22 | Bosch Rexroth Aktiengesellschaft | Hydraulische Steueranordnung, insbesondere für eine Winde |
| DE10039982A1 (de) * | 2000-08-16 | 2002-03-07 | Tesa Ag | Klebebänder mit textilem Träger für die Ummantelung von langgestrecktem Gut, wie insbesondere Kabelsätzen |
| JP4002489B2 (ja) * | 2002-08-28 | 2007-10-31 | 新キャタピラー三菱株式会社 | 制御弁装置 |
| DE102005050169A1 (de) | 2005-06-21 | 2006-12-28 | Bosch Rexroth Ag | LS-Steueranordnung und LS-Wegeventil |
| DE102006040234A1 (de) * | 2006-08-28 | 2008-03-06 | Robert Bosch Gmbh | LS-Steueranordnung |
| JP5657294B2 (ja) * | 2010-07-16 | 2015-01-21 | ナブテスコ株式会社 | 多系統切替弁 |
| RU2468272C2 (ru) * | 2011-02-14 | 2012-11-27 | Открытое акционерное общество "Павловский машиностроительный завод ВОСХОД" - ОАО "ПМЗ ВОСХОД" | Гидравлический редукционный клапан |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB971821A (en) | 1961-03-28 | 1964-10-07 | Hamworthy Engineering | Improvements in or relating to hydraulic control valves |
| GB1438657A (en) | 1972-08-23 | 1976-06-09 | Post Office | Electrical connectors |
| DE2342498A1 (de) * | 1973-08-23 | 1975-02-27 | Bosch Gmbh Robert | Hydraulische steuervorrichtung |
| CA1030040A (en) * | 1975-01-13 | 1978-04-25 | Commercial Shearing | Compensated work port fluid valves |
| DE2647140A1 (de) * | 1976-10-19 | 1978-04-20 | Linde Ag | Ventil mit einem laengsschieber |
| DE2649775A1 (de) * | 1976-10-29 | 1978-05-03 | Linde Ag | Ventil mit einem laengsschieber |
| DE3341641A1 (de) * | 1983-11-17 | 1985-05-30 | Mannesmann Rexroth GmbH, 8770 Lohr | Wegeventil mit bremskolben |
| SE501289C2 (sv) | 1993-06-24 | 1995-01-09 | Voac Hydraulics Boraas Ab | Styrorgan för en hydraulisk motor |
-
1996
- 1996-12-13 DE DE19651967A patent/DE19651967A1/de not_active Withdrawn
-
1997
- 1997-12-06 WO PCT/EP1997/006826 patent/WO1998026186A1/de not_active Ceased
- 1997-12-06 DE DE59709985T patent/DE59709985D1/de not_active Expired - Lifetime
- 1997-12-06 EP EP97953751A patent/EP0943057B1/de not_active Expired - Lifetime
- 1997-12-06 US US09/319,794 patent/US6179393B1/en not_active Expired - Lifetime
- 1997-12-06 JP JP52618898A patent/JP2001509235A/ja active Pending
- 1997-12-06 AT AT97953751T patent/ATE239174T1/de active
Also Published As
| Publication number | Publication date |
|---|---|
| US6179393B1 (en) | 2001-01-30 |
| ATE239174T1 (de) | 2003-05-15 |
| WO1998026186A1 (de) | 1998-06-18 |
| EP0943057A1 (de) | 1999-09-22 |
| DE19651967A1 (de) | 1998-06-18 |
| DE59709985D1 (de) | 2003-06-05 |
| JP2001509235A (ja) | 2001-07-10 |
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| DE19625348A1 (de) | Anordnung zur Ansteuerung eines hydraulisch betätigbaren Hauptventils |
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