EP2761190A2 - Hydraulic system with suction/return filter - Google Patents
Hydraulic system with suction/return filterInfo
- Publication number
- EP2761190A2 EP2761190A2 EP12746359.4A EP12746359A EP2761190A2 EP 2761190 A2 EP2761190 A2 EP 2761190A2 EP 12746359 A EP12746359 A EP 12746359A EP 2761190 A2 EP2761190 A2 EP 2761190A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- suction
- return
- line
- filter
- hydraulic
- 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.)
- Granted
Links
- 239000003921 oil Substances 0.000 claims abstract description 43
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 18
- 239000002002 slurry Substances 0.000 claims description 6
- 230000036316 preload Effects 0.000 description 6
- 238000010926 purge Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000037452 priming Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
- F15B13/07—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors in distinct sequence
-
- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/46—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for preparing and placing the materials, e.g. slurry seals
- E01C19/47—Hydraulic cement concrete mixers combined with distributing means specially adapted for road building
- E01C19/475—Distributing means therefor, e.g. boom-and-bucket arrangements
-
- 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/027—Installations or systems with accumulators having accumulator charging devices
Definitions
- the invention relates to a hydraulic system, preferably for controlling and actuating a mobile thick matter pump, having a tank under atmospheric pressure for receiving hydraulic oil, with a at least one hydraulic consumer driving primary circuit, the at least one motor-driven input side via a first suction line acted upon with hydraulic oil, on the output side to a at least one first return line connected hydraulic primary pump and an output side communicating with the suction line and the input side with return oil from the at least one return line acted suction return filter and with a branched off from the first suction line, about a bias valve in the tank opening branch line.
- the invention differs from conventional thick matter pumps in that the suction line to the primary pump and the returns from the primary circuit do not open into the tank, but that the suction line communicates with the outlet side of the suction / return filter, while the return lines to the inlet side of the suction Return filters are connected.
- This so-called suction-return filter system requires an excess amount of oil to z. B. compensate for leakage oil, which are led directly to the tank, or to compensate for short-term missing oil volumes in the return due to the compressibility of the hydraulic oil on the pressure side.
- a secondary circuit which has at least one motor-driven, acted upon by a second suction line with hydraulic oil, output connected to at least one second return line hydraulic secondary pump, the second suction preferably communicates via a suction filter with the tank and the second return line either flows into the tank or the input side is connected to the suction-return filter.
- the Ver- remaining excess oil in the suction-return filter system is fed to the tank via the preload valve.
- the suction / return filter system ensures that the surplus oil quantity in conjunction with the preload valve results in optimum suction conditions for the primary pumps connected to the first intake line in the primary circuit, that the cold start behavior is improved by the preload and that the fuel passing through the tank Guided oil quantity is significantly reduced, so that a much smaller tank volume and thereby a weight reduction and a cost reduction during oil change is possible.
- the first suction line communicates with the tank via a separate, large-sized suction line and a further suction filter and that a suction-suction valve biased in the direction of the further suction filter is arranged in the suction line.
- a preferred embodiment of the invention provides that in at least one of the return lines, an oil cooler is arranged. This is especially important when it comes to heating the hydraulic oil during operation. It is further proposed according to a preferred embodiment of the invention that in at least one of the input side connected to the suction-return filter return lines, a check valve is arranged.
- a preferred embodiment of the invention provides that at least one of the primary pumps in the primary circuit is designed as a filling and feed pump of a two-cylinder slurry pump driven by a reversing pump. It is a guided over the reversing pump closed hydraulic circuit, which forms the consumer in the terminology of the present invention together with the reversing pump.
- one of the return lines is designed as a drain line of the reversible pump. If, to increase the cooling capacity, the reversing pump leakage oil must be routed through an oil cooler, it may be necessary to provide a check valve in the respective return line in order to protect the reversing pump against pressure peaks from the other recirculation. In addition, a check valve must then be provided, which is connected on the outlet side directly to the suction-return filter or leads directly into the tank.
- a further advantageous embodiment of the invention provides that one of the return lines is designed as a flushing oil line connected on the output side to an alternating flush valve of the reversing pump, which is preferably returned to the suction / return filter via the oil cooler.
- one of the hydraulic primary pumps is connected to the drive hydraulics of a distribution mast as a consumer whose return line is connected on the input side to the suction-return filter.
- one of the primary pumps or secondary pumps is connected to a hydraulic agitator drive whose return line is connected on the input side to the suction-return filter.
- one of the secondary pumps in the secondary circuit can be connected to the drive hydraulics of a diverter valve or a slide valve of the slurry pump, whose return line opens into the tank.
- a separate hydraulic secondary pump to be provided in the secondary circuit. see, which is connected with its pressure side input side to the suction-return filter and supplies at least a portion of the required excess oil.
- a check valve or by-pass valve is arranged between the inlet side of the suction / return filter and the tank.
- the hydraulic circuits shown in FIGS. 1 and 2 are intended for a thick matter pump, the two delivery cylinder 10,10 ', the frontal openings 12,12' open into a material feed container, not shown, and alternately during the pressure stroke via a crossover 14 with a conveyor line, not shown, are connectable.
- the delivery cylinders 10, 10 ' are driven in push-pull fashion via hydraulic drive cylinders 16, 16' and the hydraulic reversing pumps 18, 20 designed as swash plate axial piston pumps in the embodiment shown.
- the delivery pistons 22, 22 ' are connected to the drive pistons 24, 24' of the drive cylinders 16, 16 'via a respective common piston rod 26, 26'.
- Between the delivery cylinders 10,10 'and the drive cylinders 16,16' is a water tank 28 through which the piston rods 26,26 'reach through.
- the drive cylinder 16,16 ' are in the embodiments shown on the bottom side via hydraulic lines 30, 30', 32, 32 'of a closed Main circuit using the reversing 18.20 charged with hydraulic oil and are hydraulically connected to each other at their rod-side ends via a swing oil pipe 34.
- the direction of movement of the drive piston 24,24 'and thus the delivery piston 22,22' is reversed, that the swash plates 18 ', 20' of the Reversierpumpen 18,20 triggered by a Um tenusignal swing through its zero position and thus the conveying direction of the hydraulic oil in the hydraulic lines 30, 30 ', 32, 32' of the main circuit change.
- the primary pumps 36,38 are arranged in a suction-return system having an output side 40 "connected to a suction-return filter 40 first suction line 42 and its coming from the reversing 18.20 Lecköltechnischen as return lines 44,44 'input side 40' to the A further return line 46 is branched off from the drive hydraulic system AH via an alternating purge valve 48 and a low-pressure limiting valve 50 and returned via the oil cooler 52 and the line 54 to the inlet side 40 'of the suction / return filter 40
- the suction / return filter system requires an excess quantity of oil in order, for example, to compensate for leakage oil quantities flowing to the tank 68 via the lines 55 or to compensate for short-term missing oil quantities due to the compressibility of the hydraulic oil on the pressure side is at least partially about one in a Se arranged secondarily arranged, motor-driven and at least one second suction line 58 acted upon by hydraulic oil hydraulic secondary pump 60,62.
- the second suction line 58 communicates Either directly or via a suction filter 66 with the tank 68.
- the secondary circuit On the output side, the secondary circuit is connected to at least one return line, which either opens into the tank 68 or is connected to the input side 40 'of the suction-return filter 40.
- the suction-return filter system also includes a check valve on the input side 40 'of the suction-return filter 40, which protects as a bypass valve 72, the filter element of the suction-return filter 40 from excessive pressure difference.
- the advantages of the suction / return filter system consist in the fact that the excess amount of oil in conjunction with the preload valve 70 results in optimum suction conditions for the primary pumps in the primary circuit. Furthermore, the cold start behavior of the primary pumps is improved and the amount of oil circulating through the tank 68 is reduced. The latter means that the tank volume, for example, reduced to less than half the usual size and thus the tank and oil weight and to be exchanged at an oil change amount of oil.
- the circuit for actuating and controlling the distribution boom MH is a consumer of the primary circuit.
- the supply of the mast control via the further primary pump 71, the suction side is connected via the line 73 to the first Sauglei- 42 at the output 40 "of the suction-return filter 40 and the return line 74 via the oil cooler 52 and the line 54 to the input side of In the load part MH of the mast control, the outrigger control can optionally also be integrated, which ensures that the mobile concrete pump with its hydraulically actuated support legs is supported on the ground Differential cylinders, as used, for example, to extend the support legs and to extend them.
- ren of the mast come to a significant undersupply in the suction-return filter system. This is partially compensated in the embodiment shown by a large amount of excess oil, which is recycled in the secondary circuit with a large secondary pump 60,62 which is connected to the tank 68 to the suction-return filter 40.
- the secondary pump 60 is used for this purpose, which serves as a consumer for controlling an arranged in the material feed tank agitator RS whose return line 76 via the oil cooler 52 and the output line 54 to the input 40 'of the suction-return filter 40 is returned.
- the embodiment of FIG. 2 differs in this respect from Fig. 1 in that the agitator control RS is supplied with a primary pump 61 via the suction-return filter 40 and the first suction line 42 with hydraulic oil and thus is part of the primary circuit.
- a secondary pump 62 dedicated to the provision of the surplus oil is provided, the suction side 62 'communicates with the tank 68 via the second suction line 58 and the suction filter 66 and the pressure side 62 "either via the oil cooler 52 and the line 54 or via the check valve 78 and the line 80 to the input side 40 'of the suction-return filter 40 is guided.
- Another special feature of the invention is that at least part of the excess oil quantity is made available via a separate, adequately dimensioned suction line 86.
- This Nachsaugetechnisch 86 is attached to the suction filter 66 in the embodiment shown. closed, from which the primary pumps 36,38,61, 70 of the primary circuit suck in hydraulic oil via a Nachsaugeventil 88 and the first suction line 42.
- the Nachsaugetechnisch 86 must be at least so dimensioned that at maximum Nachsaugemenge the flow rate in the Nachsaugetechnisch does not rise above 0.8 m / s and the negative pressure does not fall below the permissible minimum value of the priming primary pump, for example, 0.8 bar.
- the Nachsaugetechnisch 86 and the Nachsaugeventil 88 must be sufficiently large, because there may be an operating condition in which only the primary pump 71 of the mast hydraulic MH is in operation and the drive for the other hydraulic pumps is turned off. In this case, then the secondary pump 60 and 62 for the excess oil amount out of service.
- the differential cylinders in the mast hydraulics MH or in the support hydraulics retract or off, there is either an excess of oil at the suction return filter 40, which is led to the tank 68 via the preload valve 70, or the result is a Lack of oil, which must then be compensated via the Nachsauge effet 86 and the Nachsaugeventil 88 and the suction filter 66 from the tank 68.
- the invention relates to a hydraulic system, preferably for driving and actuating a two-cylinder slurry pump.
- the hydraulic system includes a tank 68 for receiving hydraulic oil, a primary circuit having at least one hydraulic consumer AH, MH, the at least one acted upon by a first suction line 42 with hydraulic oil primary pump 36,38,61, 70 and the output side is connected to at least one first return line and the one with the output side Having the first suction line 42 communicating and the input side with return oil from the at least one return line acted upon suction-return filter 40.
- a special feature of the invention is that the first suction line 42 via a separate Nachsaugetechnisch 86 and a suction filter 66 communicates with the tank 68, wherein in the Nachsauge effet 86 an in the direction of the suction filter 66 biased Nachsaugeventil 88 is arranged.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Analytical Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Fluid-Pressure Circuits (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Details Of Reciprocating Pumps (AREA)
- Filtration Of Liquid (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011083874A DE102011083874A1 (en) | 2011-09-30 | 2011-09-30 | Hydraulic system with suction return filter |
PCT/EP2012/065931 WO2013045167A2 (en) | 2011-09-30 | 2012-08-15 | Hydraulic system with suction/return filter |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2761190A2 true EP2761190A2 (en) | 2014-08-06 |
EP2761190B1 EP2761190B1 (en) | 2017-03-08 |
Family
ID=46651533
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12746359.4A Active EP2761190B1 (en) | 2011-09-30 | 2012-08-15 | Hydraulic system with return line suction and boost filter |
Country Status (8)
Country | Link |
---|---|
US (1) | US9551362B2 (en) |
EP (1) | EP2761190B1 (en) |
JP (1) | JP6082745B2 (en) |
KR (1) | KR101968787B1 (en) |
CN (1) | CN103890411B (en) |
BR (1) | BR112014007470B1 (en) |
DE (1) | DE102011083874A1 (en) |
WO (1) | WO2013045167A2 (en) |
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US8854595B2 (en) | 2008-03-03 | 2014-10-07 | Manufacturing Resources International, Inc. | Constricted convection cooling system for an electronic display |
US8773633B2 (en) | 2008-03-03 | 2014-07-08 | Manufacturing Resources International, Inc. | Expanded heat sink for electronic displays |
US9173325B2 (en) | 2008-03-26 | 2015-10-27 | Manufacturing Resources International, Inc. | Heat exchanger for back to back electronic displays |
US8497972B2 (en) | 2009-11-13 | 2013-07-30 | Manufacturing Resources International, Inc. | Thermal plate with optional cooling loop in electronic display |
US8654302B2 (en) | 2008-03-03 | 2014-02-18 | Manufacturing Resources International, Inc. | Heat exchanger for an electronic display |
US8693185B2 (en) | 2008-03-26 | 2014-04-08 | Manufacturing Resources International, Inc. | System and method for maintaining a consistent temperature gradient across an electronic display |
US10827656B2 (en) | 2008-12-18 | 2020-11-03 | Manufacturing Resources International, Inc. | System for cooling an electronic image assembly with circulating gas and ambient gas |
US8749749B2 (en) | 2008-12-18 | 2014-06-10 | Manufacturing Resources International, Inc. | System for cooling an electronic image assembly with manifolds and ambient gas |
EP2909829B1 (en) | 2012-10-16 | 2020-02-12 | Manufacturing Resources International, INC. | Back pan cooling assembly for electronic display |
US10524384B2 (en) | 2013-03-15 | 2019-12-31 | Manufacturing Resources International, Inc. | Cooling assembly for an electronic display |
US9648790B2 (en) | 2013-03-15 | 2017-05-09 | Manufacturing Resources International, Inc. | Heat exchanger assembly for an electronic display |
DE102013006333A1 (en) * | 2013-04-12 | 2014-10-16 | Liebherr-Betonpumpen Gmbh | Two-cylinder slurry pump |
US9470924B2 (en) | 2013-07-08 | 2016-10-18 | Manufacturing Resources International, Inc. | Figure eight closed loop cooling system for electronic display |
AU2015229457B2 (en) | 2014-03-11 | 2018-11-22 | Manufacturing Resources International, Inc. | Hybrid Rear Cover and Mounting Bracket for Electronic Display |
CA2947524C (en) | 2014-04-30 | 2018-04-03 | Manufacturing Resources International, Inc. | Back to back electronic display assembly |
US9723765B2 (en) | 2015-02-17 | 2017-08-01 | Manufacturing Resources International, Inc. | Perimeter ventilation system for electronic display |
ES2909480T3 (en) | 2016-03-04 | 2022-05-06 | Mri Inc | Cooling system for double-sided display assembly |
US10485113B2 (en) | 2017-04-27 | 2019-11-19 | Manufacturing Resources International, Inc. | Field serviceable and replaceable display |
EP3616481B1 (en) | 2017-04-27 | 2024-07-24 | Manufacturing Resources International, Inc. | System and method for preventing display bowing |
CN107504017B (en) * | 2017-06-09 | 2023-10-27 | 上海航兴机电工程有限公司 | Hydraulic oil intelligent purification system of hydraulic gate hydraulic system |
US10559965B2 (en) | 2017-09-21 | 2020-02-11 | Manufacturing Resources International, Inc. | Display assembly having multiple charging ports |
CN108181871B (en) * | 2018-01-19 | 2020-05-26 | 黑龙江工业学院 | Method for controlling filtering device by computer |
US10602626B2 (en) | 2018-07-30 | 2020-03-24 | Manufacturing Resources International, Inc. | Housing assembly for an integrated display unit |
US11096317B2 (en) | 2019-02-26 | 2021-08-17 | Manufacturing Resources International, Inc. | Display assembly with loopback cooling |
US10795413B1 (en) | 2019-04-03 | 2020-10-06 | Manufacturing Resources International, Inc. | Electronic display assembly with a channel for ambient air in an access panel |
KR102021460B1 (en) | 2019-04-14 | 2019-09-16 | 정원호 | Plate material groove forming device |
DE102020200261A1 (en) * | 2020-01-10 | 2021-07-15 | Putzmeister Engineering Gmbh | Method for operating a thick matter pump and thick matter pump |
US20210301842A1 (en) * | 2020-03-31 | 2021-09-30 | Deere & Company | Drain for hydraulic system |
CN111608998B (en) * | 2020-05-12 | 2022-06-21 | 湖北锐坤机械制造有限公司 | Hydraulic control system of loader-digger for coal mine |
US11477923B2 (en) | 2020-10-02 | 2022-10-18 | Manufacturing Resources International, Inc. | Field customizable airflow system for a communications box |
US11470749B2 (en) | 2020-10-23 | 2022-10-11 | Manufacturing Resources International, Inc. | Forced air cooling for display assemblies using centrifugal fans |
US11778757B2 (en) | 2020-10-23 | 2023-10-03 | Manufacturing Resources International, Inc. | Display assemblies incorporating electric vehicle charging equipment |
CN112324754A (en) * | 2020-11-18 | 2021-02-05 | 湖北绿智精工科技有限公司 | Automatic control reversing impact eliminating device for compression system of garbage station |
US11966263B2 (en) | 2021-07-28 | 2024-04-23 | Manufacturing Resources International, Inc. | Display assemblies for providing compressive forces at electronic display layers |
US11744054B2 (en) | 2021-08-23 | 2023-08-29 | Manufacturing Resources International, Inc. | Fan unit for providing improved airflow within display assemblies |
US11762231B2 (en) | 2021-08-23 | 2023-09-19 | Manufacturing Resources International, Inc. | Display assemblies inducing turbulent flow |
US11919393B2 (en) | 2021-08-23 | 2024-03-05 | Manufacturing Resources International, Inc. | Display assemblies inducing relatively turbulent flow and integrating electric vehicle charging equipment |
US11968813B2 (en) | 2021-11-23 | 2024-04-23 | Manufacturing Resources International, Inc. | Display assembly with divided interior space |
DE102022207009A1 (en) | 2022-07-08 | 2024-01-11 | Putzmeister Engineering Gmbh | Construction machine |
US12010813B2 (en) | 2022-07-22 | 2024-06-11 | Manufacturing Resources International, Inc. | Self-contained electronic display assembly, mounting structure and methods for the same |
US12072561B2 (en) | 2022-07-22 | 2024-08-27 | Manufacturing Resources International, Inc. | Self-contained electronic display assembly, mounting structure and methods for the same |
US12035486B1 (en) | 2022-07-25 | 2024-07-09 | Manufacturing Resources International, Inc. | Electronic display assembly with fabric panel communications box |
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US3945208A (en) * | 1974-01-02 | 1976-03-23 | Allis-Chalmers Corporation | Filtration for integrated tractor hydraulic system |
DE3528067A1 (en) * | 1985-08-05 | 1987-02-12 | Rexroth Mannesmann Gmbh | Switching arrangement for a hydraulic system |
DE3840892A1 (en) * | 1988-12-05 | 1990-06-07 | Putzmeister Maschf | METHOD AND DEVICE FOR CONTROLLING A TWO-CYLINDER FUEL PUMP |
DE19511482C2 (en) | 1995-03-29 | 2000-01-20 | Argo Gmbh Fuer Fluidtechnik | Hydraulic circuit |
DE19542258A1 (en) | 1995-11-13 | 1997-05-15 | Putzmeister Maschf | Method and device for controlling a two-cylinder thick matter pump |
DE10150467A1 (en) * | 2001-10-16 | 2003-04-17 | Putzmeister Ag | Pump for chick material, comprises IC engine drive and at least one hydraulic pump of reversible type |
JP2004225877A (en) * | 2003-01-27 | 2004-08-12 | Oil Drive Kogyo Kk | Pilot-operated check valve and hydraulic circuit for elevator using the same |
DE102004015419A1 (en) * | 2004-03-26 | 2005-10-13 | Putzmeister Ag | Apparatus and method for controlling a slurry pump |
DE102005035981A1 (en) * | 2005-07-28 | 2007-02-01 | Putzmeister Ag | Hydraulic circuit arrangement, in particular for the drive of concrete distributor masts |
US7553408B2 (en) * | 2006-03-07 | 2009-06-30 | Deere & Company | Hydraulic lubrication filter circuit |
DE102006051821A1 (en) * | 2006-11-03 | 2008-05-08 | Hydac Filtertechnik Gmbh | supply |
DE102007056362A1 (en) * | 2007-11-22 | 2009-05-28 | Hydac Filtertechnik Gmbh | Filter device, in particular return-suction filter, and filter element for such a filter device |
DE102009008517B4 (en) * | 2009-02-11 | 2018-01-04 | Götz Hudelmaier | Hydraulic drive of a slurry pump with boost pressure device |
-
2011
- 2011-09-30 DE DE102011083874A patent/DE102011083874A1/en not_active Withdrawn
-
2012
- 2012-08-15 JP JP2014532291A patent/JP6082745B2/en active Active
- 2012-08-15 CN CN201280047631.8A patent/CN103890411B/en active Active
- 2012-08-15 WO PCT/EP2012/065931 patent/WO2013045167A2/en active Application Filing
- 2012-08-15 BR BR112014007470-4A patent/BR112014007470B1/en active IP Right Grant
- 2012-08-15 KR KR1020147007916A patent/KR101968787B1/en active IP Right Grant
- 2012-08-15 US US14/346,024 patent/US9551362B2/en active Active
- 2012-08-15 EP EP12746359.4A patent/EP2761190B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
US20140230424A1 (en) | 2014-08-21 |
CN103890411B (en) | 2016-11-02 |
KR20140078635A (en) | 2014-06-25 |
US9551362B2 (en) | 2017-01-24 |
WO2013045167A2 (en) | 2013-04-04 |
CN103890411A (en) | 2014-06-25 |
KR101968787B1 (en) | 2019-04-12 |
DE102011083874A1 (en) | 2013-04-04 |
JP6082745B2 (en) | 2017-02-15 |
BR112014007470B1 (en) | 2021-01-19 |
BR112014007470A2 (en) | 2017-04-04 |
JP2014530330A (en) | 2014-11-17 |
EP2761190B1 (en) | 2017-03-08 |
WO2013045167A3 (en) | 2013-06-27 |
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