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WO/2020/262073A1 |
Provided is a hydraulic drive device (20) for a work machine with which it is possible to ensure drive pressure for a work actuator in a combined operation state, and to transition suitably from an independent operation state to a combin...
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WO/2020/262076A1 |
Disclosed is a hydraulic control device (20) capable of unerringly determining whether or not a regenerative operation is possible. The hydraulic control device (20) is equipped with: a channel-switching valve (70) for switching a supply...
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WO/2020/262201A1 |
This hydraulic excavator is provided with: a control valve unit which controls the flow of pressure oil supplied from a hydraulic pump to a plurality of hydraulic actuators; a plurality of operation lever devices which output pilot press...
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WO/2020/250573A1 |
Provided is a work machine capable of suppressing acceleration of a turning motor at a time unintended by the operator. The work machine comprises: first and second work actuator control valves (51, 52); a work command regulator (60) tha...
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WO/2020/242319A1 |
Metering device (1) for discharging an amount of fluid, said metering device (1) comprises a discharge device (13) comprising a discharge cylinder (14) and a discharge piston (5), said discharge cylinder (14) having a predefined fluid vo...
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WO/2020/239258A1 |
The present disclosure relates to a blended or hybrid power system with increased operating efficiency. The blended power system combines the advantages of electrical power with the advantages of hydraulic power when delivering power to ...
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WO/2020/233744A1 |
The invention relates to a modular pneumatic cylinder (1) comprising multiple cylinder stages (4), a cylinder base (2), and a cylinder head (3). An axial longitudinal bore (5) is provided which runs between the cylinder base and the cyli...
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WO/2020/235242A1 |
A hydraulic system that comprises: an electromagnetic valve having a valve spool that slides inside a housing and moving the valve spool to a position corresponding to an input operation command; and a control device that outputs operati...
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WO/2020/229405A1 |
The invention relates to a hydraulic drive system consisting of at least two individual units (2), each of which has a hydraulic pump (14) that can be actuated by means of a drive (12) and that feeds pressurised fluid on the output side ...
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WO/2020/231554A1 |
A machine control system (202) can store model weights (222) determined via machine learning using a training dataset correlating preset hydraulic valve displacements to measured movement parameters of a machine component (106, 108, 110)...
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WO/2020/230362A1 |
This control valve for a center bypass-type industrial vehicle comprises a priority-type shunt valve (13) that shunts hydraulic oil from a hydraulic pump (8) to a power steering device of the industrial vehicle and to switching valve mec...
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WO/2020/227351A1 |
In accordance with one embodiment of the present disclosure, a material moving machine comprises a pilot hydraulic switching system. The pilot hydraulic switching system comprises a control unit, a first directional valve, and a second d...
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WO/2020/220165A1 |
A mutual feedback automatic control device for a dual fluid load, a driving method therefor, and a foot type mobile machine. The mutual feedback automatic control device for a dual fluid load makes two fluid loads timely mutually feed ba...
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WO/2020/223373A1 |
The subject matter of this specification can be embodied in, among other things, an assembly that includes a piston having a piston inner surface defining a cylindrical cavity and includes a first axial portion, a piston face at a first ...
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WO/2020/216473A1 |
The present disclosure relates to a hydraulic drive system having a hydraulic circuit architecture operable in first and second modes. In a first mode, a main hydraulic pump (22) is used to drive a hydraulic actuator (24) via a closed hy...
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WO/2020/216453A1 |
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/2020/213019A1 |
Machine to recover a cable, comprising at least one hydraulic pump (19) with variable cubic capacity, provided with a system (23) to adjust the cubic capacity, driven by a servo controller (24), and at least one hydraulic motor (21) fed ...
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WO/2020/207555A1 |
A hydraulic system (10) for driving a rotatable load comprises: a high-pressure line (40) for hydraulic fluid; a pump (12) configured to supply pressurized hydraulic fluid to the high-pressure line (40); a variable displacement hydraulic...
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WO/2020/203906A1 |
A shovel (100) comprises a lower traveling body (1), an upper turning body (3) that is turnably mounted on the lower traveling body (1), an engine (11) that is mounted on the upper turning body (3), a main pump (14) that is driven by the...
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WO/2020/202309A1 |
A pump limit flow rate, which is the upper-limit value of pump flow rates that can be discharged from a plurality of hydraulic pumps to each of a plurality of hydraulic actuators, is calculated in accordance with the pressure of pressure...
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WO/2020/202659A1 |
The present invention prevents a work machine (1) from advancing or retreating when an accelerator is not being operated. The work machine (1) is provided with: a traveling device; a traveling motor (51) that transmits power to the trave...
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WO/2020/200794A1 |
The invention relates to a hydraulic system for controlling a stabiliser drive, in particular for controlling an angle of attack and/or controlling the pivoting out and in of a stabiliser wing, preferably for ships. The hydraulic system ...
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WO/2020/200507A1 |
A compressed gas energy conversion system comprises at least a twin group that includes a compressed gas energy conversion-heat exchanger assembly and a compressed-gas energy conversion-heat exchanger assembly pre-stage device which, as ...
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WO/2020/203245A1 |
Provided is a technology capable of further improving operability during suspension work in a shovel. A shovel 100 according to an embodiment of the present disclosure is provided with: a lower traveling body 1; an upper rotary body 3 ro...
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WO/2020/202986A1 |
The present invention discloses a shovel in which a technology is provided which can suitably adjust a flow rate of a hydraulic pump in a composite operation in which a preliminary attachment and another element to be driven are simultan...
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WO/2020/203884A1 |
An excavator (100) is provided with: a lower travelling body (1); an upper revolving body (3); an engine (11); an electrically controlled left main pump (14L); an electrically controlled right main pump (14R); a left regulator (13L) that...
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WO/2020/204803A1 |
The invention pertains to a method for controlling operation of a hydraulic system of a mining machine (100). Said hydraulic system comprises an electric motor configuration (230, 231, 232), a variable displacement pump configuration (24...
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WO/2020/194926A1 |
A controller (22) controls the operation or the opening and closing of, for example: an electric motor (4) of a compressor (3); supply/exhaust valves (11) on the FL, FR, RL, and RR sides; an inlet solenoid valve (14); a return solenoid v...
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WO/2020/194730A1 |
The purpose of the present invention is to provide a construction machine demonstrating good engine startability under a low temperature environment. This construction machine comprises: an electric pump that has a discharge port conne...
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WO/2020/195433A1 |
Provided is a medical robot system capable of improving the safety of a medical robot using a plurality of pneumatic actuators. The medical robot system, of which the movement is controlled by a plurality of gas pressure actuators driven...
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WO/2020/196871A1 |
This excavator comprises a flow rate control valve that controls flow rate according to pilot pressure on each load side and bottom side of a plurality of hydraulic cylinders.
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WO/2020/195555A1 |
A fluid pressure control device (100) provided with a switching valve (30) for controlling the flow of hydraulic fluid supplied from a first pump (7) to a hydraulic cylinder (1), a confluence control valve (60) for controlling the flow o...
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WO/2020/195072A1 |
This valve device (10) is provided with: a housing (20); a valve body (110) accommodated in the housing (20); a biasing member (9) that biases the valve body (110); an annular sheet member (130) that is disposed between the valve body (1...
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WO/2020/190446A1 |
A regeneration valve (70) includes a housing (72) defining a first port (74), a second port (75), a third port (76), and a chamber fluidly communicating with the first, second, and third ports (74, 75, 76). The chamber has a valve elemen...
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WO/2020/189352A1 |
Provided is a hydraulic circuit, for a construction machine, which drives an actuator by merging pressure oil from a fixed-volume pump into a center bypass oil path from a variable-volume pump to an oil tank, wherein the flow rate of flo...
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WO/2020/189757A1 |
In one embodiment, an excavator (100) has: a left main pump (14L); an arm cylinder (8); a hydraulic turning motor (2A); a directional control valve (173) corresponding to the hydraulic turning motor (2A); a directional control valve (176...
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WO/2020/186841A1 |
A hydraulic control emergency operation device for a screw hoist, comprising: a hydraulic control device, which is arranged on a mobile vehicle, and is connected with a hydraulic driving device (25) through a high-pressure hose provided ...
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WO/2020/188920A1 |
Provided is a hydraulic shovel that can improve work efficiency while limiting fuel consumption by way of reducing hydraulic loss when simultaneously operating a plurality of hydraulic actuators with different loads. The hydraulic shov...
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WO/2020/184606A1 |
A shovel (100) comprises a lower traveling body (1), an upper turning body (3) that is turnably mounted on the lower traveling body (1), an engine (11) that is mounted on the upper turning body (3), a main pump (14) that is driven by the...
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WO/2020/179204A1 |
Provided is a construction machine with which an operator can linearly push out a bucket by only operating an arm in the push-out direction. A controller 50 calculates a certain flow rate ratio according to a boom initial angle which i...
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WO/2020/179429A1 |
The objective of the present invention is to prevent the speed of a given actuator from decreasing and the work speed from decreasing when that actuator is being driven by discharge oil from a plurality of pumps and an operator accidenta...
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WO/2020/180137A1 |
Disclosed are a pneumatic cylinder system and a cut-off valve including same, the system comprising: a pneumatic housing having a hollow inner space; and a pneumatic piston dividing the inner space into a first space and a second space, ...
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WO/2020/178832A1 |
A power drive for a passenger and/or cargo elevator—or any conveyance— using stored high pressure compressed air as a primary source, producing high pressure hydraulic fluid energy to move a servo-controlled hydraulic motor, mechanic...
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WO/2020/180085A1 |
The present invention relates to a hydraulic line-less hydraulic cylinder module and a medical bed using same, more specifically to a hydraulic line-less hydraulic cylinder module which has a compact and simple structure and which can be...
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WO/2020/175132A1 |
Provided is a construction machine equipped with a hydraulic system having pairs of: a closed circuit pump and a proportional valve; and an open circuit pump and a proportional valve. The construction machine is capable of increasing the...
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WO/2020/175262A1 |
A flow path switching device (1) comprises a first layer-side flow path formation unit (10), a second layer-side flow path formation unit (15), and a drive unit (30) and switches the flow path configuration of a fluid circuit (50) throug...
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WO/2020/175004A1 |
A hydraulic shovel driving system (1A) of one aspect of the present invention includes a reproduction line (51) for connecting an arm pull feeding line (31) and an arm push feeding line (32) located between an arm cylinder (14) and an ar...
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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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