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WO/2020/175399A1 |
The present invention provides a technology that makes it possible to improve operation performance and reduce the time and financial costs needed for research and development. The present invention comprises: an operation tool (swivel l...
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WO/2020/170540A1 |
Provided is a work machine that is not provided with a merging pipe allowing pressurized oil from a second pump to be supplied to a boom cylinder bottom-side chamber and that can achieve, during lifting motion of a slewing boom, operabil...
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WO/2020/170594A1 |
Provided is a construction machine in which is mounted a hydraulic system wherein a closed-circuit pump and an open-circuit pump are arranged in a pair, and which is able to operate stably even when the responsiveness of a switching valv...
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WO/2020/169250A1 |
To achieve reduction of fuel consumption and enhancement of operability, in a hydraulic control circuit provided with a bypass oil passage formed by being branched from a discharge line of a hydraulic pump and extending to an oil tank, a...
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WO/2020/166591A1 |
Provided are a construction machine and a multi-control valve unit having a simple configuration. The multi-control valve unit comprises: a plurality of first pilot chambers; a plurality of second pilot chambers; a pressure oil flow chan...
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WO/2020/166192A1 |
Provided is a construction machine capable of causing respective hydraulic actuators to accurately operate according to an operator' manipulation during a complex operation in which pressure oil of a hydraulic pump is divided and supplie...
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WO/2020/162801A1 |
The present invention concerns an actuator apparatus (1) comprising a positioning actuator device (3) configured to position a first carrier member (5') of the actuator apparatus (1). The positioning actuator device (3) comprises a first...
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WO/2020/162353A1 |
This hydraulic drive system comprises a variable-capacity first hydraulic pump, a first regulator having a first proportional valve, a second hydraulic pump that discharges hydraulic fluid, a switching valve, a control device, and a malf...
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WO/2020/162146A1 |
Provided is a turn-driving apparatus capable of ensuring high acceleration when turning is initiated, while suppressing a relief loss. This turn-driving apparatus is provided with: a hydraulic pump (20) of a variable capacity type; a tur...
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WO/2020/162086A1 |
This medical device is characterized by being provided with: a gas pressure actuator; a first flow path; a second flow path; a first closing valve provided to the first flow path; a second closing valve provided to the second flow path; ...
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WO/2020/162377A1 |
Provided is a hydraulic-pump flow-rate calibration system including: a variable-capacity-type hydraulic pump that is connected to a hydraulic actuator operated at a speed corresponding to the flow rate of a hydraulic fluid supplied there...
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WO/2020/158390A1 |
Provided is a drive device with which it is possible to effectively avoid an impact at the stroke end of a hydraulic cylinder. The drive device is provided with: hydraulic pumps (31, 32); cylinder control valves (37, 38); an operating me...
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WO/2020/157124A1 |
A vehicle having a thick matter pump has multiple supporting devices, a rotatable mast assembly with part-mast members, and a hydraulic drive assembly with hydraulic drives for the supporting devices and the mast assembly. A valve assemb...
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WO/2020/156932A1 |
The invention relates to a hydraulic feedback control loop (1) and method for controlling a hydraulic actuating cylinder (3), in particular an adjustment cylinder for a working roll in a roll stand, which cylinder comprises a cylindrical...
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WO/2020/151817A1 |
The present invention relates to a control unit (24) for a hydraulic system (16), the hydraulic system (16) comprising a hydraulic actuator (18) which in turn comprises an actuator chamber (26), the hydraulic actuator (18) comprising a f...
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WO/2020/152937A1 |
The present invention provides a construction machine on which is mounted a hydraulic closed circuit for driving a single rod-type hydraulic cylinder and a slewing hydraulic motor, and that exhibits good slewing deceleration responsivene...
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WO/2020/149838A1 |
An actuator assembly comprises a housing having a piston at least partially disposed therein. The actuator assembly includes at least one biasing mechanism disposed within the housing to selectively position the piston between a first po...
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WO/2020/145006A1 |
A hydraulic drive system which raises and lowers an object by supplying and discharging hydraulic oil to and from each of two ports of an actuator, and which is equipped with a control device, first through fifth electromagnetic proporti...
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WO/2020/136841A1 |
In this load-sensitive hydraulic fluid supply device for an industrial vehicle, a hydraulic fluid supply unit (2) is provided with: a first metering pump (21); a high-pressure circuit (41) for delivering a hydraulic fluid from the first ...
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WO/2020/136263A1 |
The invention relates to an actuation assembly (10) comprising: - a sealed chamber (100) having an inlet (101) for a pressurised gas and a movable wall (102) that can be moved between a minimum position and a maximum position; - a movabl...
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WO/2020/126959A1 |
The present invention relates to a system for driving a movable element, comprising at least one drive device (A, B) comprising: - a main motor (M11, M12) configured to be connected to the first supply line (10); - a multi-cylinder capac...
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WO/2020/122081A1 |
A hydraulic drive system raises and lowers an object by supplying and discharging hydraulic oil to and from each of two ports of an actuator, and includes a control device, first to third electromagnetic proportional control valves, a hy...
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WO/2020/119948A1 |
[Problem to Be Solved] To make it possible to control supply, discharge, and recycled flow rates independently of each other for the boom cylinder in a construction machine comprising first and second boom spool valves respectively conne...
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WO/2020/119668A1 |
An impact control hydraulic system for a rock drilling trolley, comprising a hydraulic pump (2), a rock drilling machine (22), and a multi-way directional valve (3), wherein two working oil ports of the multi-way directional valve (3) co...
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WO/2020/119691A1 |
Disclosed is an advancing hydraulic control system for a drilling jumbo, the system comprising a hydraulic pump (2), an advancing oil cylinder (16), and a multi-way reversing value (3) used for controlling the reversing of the advancing ...
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WO/2020/113952A1 |
A pumping mechanical hydraulic system, comprising an oil tank (33), a pressure oil source (3), a pumping hydraulic execution component (4), and at least two reversing valve sets (2). The pressure oil source (3) is used for outputting hyd...
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WO/2020/116301A1 |
A flow controller (12) that changes the flow rate of air exhausted from an air cylinder (100) in mid-stroke includes a first switching valve (20) displaced from a first position to a second position under the effect of pilot air, and cau...
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WO/2020/110426A1 |
This fluid-pressure driving device (100) is provided with: a flushing circuit (10) that discharges a working fluid to a tank (5) from one of a pair of main passages (2, 3). The flushing circuit (10) has: a low-pressure selection valve (1...
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WO/2020/110946A1 |
A counter balance valve (71L) is positioned between a directional control valve (23) and a hydraulic motor (32L) and is provided between a pair of supplying/discharging tube paths (25A, 25B). In the counter balance valve (71L), a spool (...
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WO/2020/105231A1 |
A main valve block (101) in a fluid pressure control device (100) has: control valves (12) that control a main actuator (7) connected to a pump (10); a neutral passage (11) that causes hydraulic fluid from the pump (10) to return to a ta...
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WO/2020/105560A1 |
A hydraulic system comprising: a cylinder that moves a moving body in the vertical direction, by using the expansion and contraction of a rod; a first bidirectional pump connected to a head-side chamber in the cylinder by a first supply/...
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WO/2020/105305A1 |
In a cylinder drive device (10), a throttle valve (70) and a second check valve (74) are provided between a switch valve (28A) and a first cylinder chamber (18) of a fluid pressure cylinder (12A). The cylinder drive device (10) has a flo...
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WO/2020/105230A1 |
A main circuit system (HC1) in a fluid pressure control device (100) has: a neutral cut-off valve (110) that connects or shuts off a first neutral passage (11) and a tank (T); a first external output passage (14) that connects downstream...
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WO/2020/106163A1 |
Multi ratio accumulator system, comprising an accumulator (1) with a hydraulic fluid chamber (10) with a first displaceable piston (12) and at least a first gas chamber (20) with a second displaceable piston (22), and the first piston (1...
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WO/2020/105559A1 |
A hydraulic system comprising: a cylinder having the interior of a tube partitioned by a piston into a first pressure chamber and a second pressure chamber; a first bidirectional pump connected to the first pressure chamber by a first su...
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WO/2020/102408A1 |
Systems and methods for control of multi-function hydraulic commands of a multi -function electrohydraulic system are provided. In one aspect, a system for hydraulic control includes a first function in fluid communication with a first e...
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WO/2020/099060A1 |
The electro-hydrostatic actuator system according to the invention comprises a volume-variable and/or rotational-speed-variable hydro machine, which is driven by an electric motor, for providing a volume flow of an hydraulic fluid, and a...
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WO/2020/097699A1 |
The present patent relates to a hydraulic unit (U) that is compact and multifunctional since it is composed of two hydraulic pumps (1 and 2) positioned in parallel, with an interposed pneumatic cylinder (3), the shaft of which is coupled...
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WO/2020/100613A1 |
A load sensing valve maintains the differential pressure at a set pressure by controlling a regulator depending on the differential pressure between the hydraulic pump discharge pressure and hydraulic actuator load pressure. The set pres...
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WO/2020/097700A1 |
The invention comprises a smart system that provides a machine or item of equipment with just the quantity of oil that will be used to perform one particular movement or more than one movement, thereby dispensing with supplying excess oi...
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WO/2020/100236A1 |
During opening and closing operations of a fluid control valve (2), the port pressure in the fluid control valve (2) is guided to a main relief valve (6) via a first passage (101) and the maximum pressure thereof is controlled by the mai...
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WO/2020/095775A1 |
The present invention comprises: a main flow path (34) that introduces high-pressure air to an air cylinder (12) or discharges exhaust air therefrom; a sub flow path (36) provided alongside the main flow path (34); an exhaust flow rate a...
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WO/2020/087139A1 |
The invention comprises a system containing a multipurpose hydraulic unit that can be used in machines and equipment, driven by low-pressure compressed air or other gases, comprising two hydraulic pumps that work together with a hydrauli...
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WO/2020/090587A1 |
This control valve (100) is provided with: a receiving hole (1A) that is formed in a housing (1) and open in an end surface of the housing (1); a spool (10) slidably inserted into the receiving hole (1A); a cap (30) that seals the openin...
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WO/2020/090586A1 |
A fluid pressure control device (100) is provided with a first pump passage (10) that guides hydraulic fluid discharged from a first pump (P1), a second pump passage (11) that guides hydraulic fluid discharged from a second pump (P2), a ...
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WO/2020/083482A1 |
A hydraulic system (100) for a working machine, the system comprising: a first electric machine (102) connected to a first hydraulic machine (104); a second electric machine (106) connected to a second hydraulic machine (108), an output ...
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WO/2020/083483A1 |
Method for controlling a hydraulic system (100) for a working machine, the system comprising: a first electric machine (102) connected to a first hydraulic machine (104), the first hydraulic machine comprising an input side (116) and an ...
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WO/2020/086325A1 |
A stiffness control and systems for the same are disclosed herein. A first plate and a second plate can be connected with rigid support, a hydraulic actuator and a high roughness surface. Upon actuation, the actuator can force the high r...
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WO/2020/074338A1 |
The invention relates to a hydraulic system (7) for use under water with a hydraulic actuating drive, wherein there are a hydraulic cylinder (15) and at least one hydraulic machine (48, 49), wherein at least one rotary drive device (54, ...
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WO/2020/074588A1 |
The invention relates to movement apparatus (1) for industrial automation, particularly for handling a workpiece, comprising: a fluid actuator (2), to which a pressure fluid can be applied, having an actuating element (3), and a pressure...
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