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WO/2024/075685A1 |
This fluid pressure control device (100) comprises a main valve block (1) and a sub valve block (50) attached to the main valve block (1). The main valve block (1) includes an actuator passage (21) through which flows a working fluid sup...
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WO/2024/075426A1 |
This hydraulic control device comprises: a virtual bleed information output unit that, on the basis of an operation amount for an operating tool 35, a discharge pressure of a hydraulic pump 22, and a virtual bleed characteristic that is ...
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WO/2024/071664A1 |
The present invention relates to a cylinder predictive maintenance method using differential pressure, the method comprising: collecting a differential pressure waveform of an operating interval, in which a cylinder rod advances and retr...
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WO/2024/071389A1 |
This work machine comprises: a pressure adjustment device capable of adjusting a driving pressure of a turning hydraulic motor; and a controller that controls the pressure adjustment device. The controller calculates a target pressure of...
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WO/2024/071598A1 |
The present invention relates to a method for predictive maintenance of a cylinder using a pressure difference, wherein a pressure difference between the internal pressure of the cylinder and the internal pressure of a main pipe for supp...
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WO/2024/071663A1 |
The present invention relates to a method for predictive maintenance of a cylinder using differential pressure, wherein: the differential pressure between the internal pressure of a cylinder and the internal pressure of a main pipe, whic...
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WO/2024/070149A1 |
A valve device 100 comprises a housing 10 provided with a load pressure passage 15 for guiding a load pressure Pls to a variable displacement pump having a discharge capacity controlled in accordance with a self-pressure Pps that is disc...
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WO/2024/071597A1 |
The present invention relates to a method for predictive maintenance of a cylinder using a pressure difference, wherein a pressure difference between the internal pressure of the cylinder and the internal pressure of a main pipe for supp...
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WO/2024/070244A1 |
The purpose of the present invention is to provide a work machine that realizes good operability and controllability by precisely controlling the pressure of an actuator without causing a sudden increase in pressure or hunting when the a...
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WO/2024/066270A1 |
The present disclosure relates to an oil cylinder system, a boom and a crane. The oil cylinder system comprises a first oil cylinder, a second oil cylinder and an oil supply pipeline; the oil supply pipeline is separately connected to th...
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WO/2024/071261A1 |
This work machine comprises a cylinder control valve that controls the flow of hydraulic oil from a hydraulic pump to a hydraulic cylinder, a first pressure reduction valve that reduces the pressure of hydraulic oil discharged from the h...
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WO/2024/062206A1 |
The invention relates to a hydraulic circuit for driving a bi-directional hydraulic actuator (200), comprising: - a hydraulic energy source (100), - a hydraulic actuator (200), - a pressure adaptation module (3000), - a first supply line...
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WO/2024/057384A1 |
[Problem] To improve upon a problem relating to a configuration using a single hydraulic oil cooling line and an accumulator in that there tends to be an increase in size due to having separate configurations for suppressing impact surge...
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WO/2024/057685A1 |
This air chuck comprises away-biasing air chambers (60a, 60d) that bias a plurality of finger parts (30, 32) away from each other, toward-biasing air chambers (60b, 60c) that bias the plurality of finger parts toward each other, a first ...
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WO/2024/052466A1 |
The invention relates to a hydraulic assembly (1) comprising a cylinder (3) and a piston (2), guided in the cylinder (3), which can be adjusted between a working position and an end position, wherein the piston (2) sealingly divides a cy...
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WO/2024/051800A1 |
The present disclosure relates to the field of automotive structural components, and provides a hydraulic system for a hybrid gearbox, and an automobile. The hydraulic system comprises a power assembly, a high-voltage driving unit, and a...
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WO/2024/051798A1 |
Provided are a hydraulic system for a hybrid gearbox and an automobile. The hydraulic system comprises a first drive pump (1), a second drive pump (2), a high-pressure oil passage (3), a low-pressure oil passage (4) and a control valve s...
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WO/2024/047987A1 |
A ship steering device (1) includes: a Raphson slider-type ship steering device body (11) which includes one or more pieces of hydraulic equipment that operate according to an electrical signal; and one or more control devices (9) that a...
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WO/2024/048527A1 |
This transportation vehicle comprises a cooling fan that is driven by a hydraulic motor, a heat exchanger that is disposed in the front part of the body of the vehicle, a fan control valve that controls the flow of hydraulic oil supplied...
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WO/2024/048813A1 |
A hydraulic machine comprising: an actuator; a high pressure accumulator; a high pressure line that supplies pressure oil to the actuator and to which the high pressure accumulator is connected; a pump that supplies pressure oil to the h...
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WO/2024/046697A1 |
The invention relates to an electrohydraulic actuator (1), comprising at least one bidirectionally operable hydraulic pump (2) for conveying hydraulic fluid, said hydraulic pump having two connection points (6a, 6b) which are designed to...
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WO/2024/043052A1 |
This hydraulic drive device (1) comprises a pump (21), an actuator (25), and a controller (40). The pump (21) discharges oil due to being rotationally driven by a power source (17). The capacity of the pump (21) can be changed. The actua...
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WO/2024/036970A1 |
A micro-angle stepping control method for a hydraulic motor. A two-position four-way reversing valve (2), a one-way valve (3), a pulse oil cylinder (4) and a two-position two-way hydraulic reversing valve (5) are sequentially arranged be...
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WO/2024/036216A1 |
A fluid control system (100; 200) for controlling flow of a process fluid can include an actuator (104; 204) and an energy storage system (102; 202). The actuator can be configured to actuate a valve (120) to control the flow of the proc...
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WO/2024/028550A1 |
The invention relates to an actuating system (2) comprising an actuator comprising a servo-cylinder (4), the servo-cylinder (4) having a rod (10) provided with a piston (12), the actuator having a device (14) for positioning the piston (...
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WO/2024/023478A1 |
Disclosed is a system for driving a member (10) by means of a hydraulic circuit, comprising: a source (100) of hydraulic energy suitable for supplying a pressure in the hydraulic circuit; a driving member (200) comprising: a crankcase (2...
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WO/2024/021578A1 |
The present application provides a hydraulic system and an engineering machine. The hydraulic system comprises: a hydraulic oil tank; a pump station connected to the hydraulic oil tank; a first multiplex multi-way valve connected to the ...
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WO/2024/022460A1 |
The present invention relates to the technical field of excavators, and particularly relates to a hydraulic system and control method for a leveling cylinder of a face shovel hydraulic excavator. The hydraulic system comprises a two-posi...
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WO/2024/016529A1 |
A leveling hydraulic control system and an aerial work platform. The leveling hydraulic control system comprises: a main oil path (100); a leveling oil path (200), the leveling oil path (200) comprising a first leveling oil cylinder (210...
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WO/2024/019434A1 |
An embodiment of the present invention relates to a construction machine. The construction machine, including a swing motor, a boom cylinder, and an arm cylinder, comprises: a main pump part including a first pump, which supplies hydraul...
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WO/2024/018743A1 |
This hydraulic device comprises: a relief valve (20) which is provided on a first oil flow passage (L1) that is for guiding, to an oil tank (100), hydraulic oil discharged from an actuator (10) and which has a vent port (23); a hydraulic...
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WO/2024/015025A1 |
A hydraulic circuit (1) of a mobile hydraulic crane (8) includes a hydro-logic valve (9, 9'), which is integrated within a compression conduit (32) between the hydraulic pump (3, 3') and each disposable group (4, 5, 6) of control valves ...
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WO/2024/014082A1 |
A hydraulic system (1) according to one embodiment includes: a first two-way pump (2) that is connected to a head-side chamber (4h) of a single rod cylinder (4) by a head-side line (21) and to a rod-side chamber (4r) of the single rod cy...
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WO/2024/014083A1 |
A hydraulic system (1) according to one embodiment includes: a variable displacement type first bidirectional pump (2) that is connected to a head-side chamber (4h) of a single rod cylinder (4) with a head-side line (21), and connected t...
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WO/2024/014388A1 |
Provided is an extrusion press device (101) comprising: an extrusion element (103); an extrusion mechanism (102) that hydraulically extrudes the extrusion element (103); pump units (U11 to U13) including pumps (P11 to P13) that supply hy...
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WO/2024/011762A1 |
Provided is a hydraulic monitoring system, which comprises: an injection pump, an injection head motor and an oil tank, the injection pump being connected to the oil tank, and the injection head motor being connected to the injection pum...
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WO/2024/007507A1 |
A hydraulic control system, a control method for a hydraulic control system, and a boom. The hydraulic control system comprises: a first proportional valve (100); a solenoid directional valve (200), a first oil port (c) of the solenoid d...
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WO/2024/009620A1 |
A hydraulic valve device 1, in order to efficiently supply a greater amount of oil to a directional spool, operates spools provided in a valve body, thereby controlling supply of oil from hydraulic pumps to hydraulic equipment. A valve b...
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WO/2024/009619A1 |
In order to improve the straight advancing ability of a work machine provided with two traveling hydraulic devices, a hydraulic valve apparatus 1 is interposed between the hydraulic devices and a hydraulic pump, and carries out supply co...
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WO/2024/009966A1 |
The purpose of the present invention is to provide a construction machine capable of suppressing a decrease in operability when a pressure sensor that measures the pressure of an actuator for driving a work device has malfunctioned in a ...
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WO/2024/004300A1 |
The present invention provides an oil pressure control device in which a neutral position, a first function position, and a second function position are arranged in the order listed, wherein an action corresponding to the second function...
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WO/2024/000738A1 |
The present application relates to the technical field of fracturing trucks, in particular to a closed hydraulic system, a fracturing truck, and a closed hydraulic system control method. The closed hydraulic system comprises an open-loop...
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WO/2024/004407A1 |
The present invention addresses the problem of suppressing an increase in pressure in a hydraulic circuit. In order to solve this problem, this hydraulic circuit has: a first oil path that links to a discharge port of a first oil pump; a...
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WO/2024/006555A1 |
Disclosed embodiments of power machines (10), implements (20) and hydraulic systems utilize a hydraulic flow control circuit (135; 235; 335; 435; 535) and method to implement multiple modes of operation while optimizing hydraulic fluid f...
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WO/2024/002941A1 |
The invention relates to a hydraulic drive for a machine which has a hydraulic linear load (30) with a first chamber (38) and at least one additional hydraulic load (32), having: a hydraulic machine (4) which can pivot through zero and a...
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WO/2024/002958A1 |
The invention relates to a hydraulic drive for a mobile machine which has a hydraulic linear consumer (30) and at least one further hydraulic consumer (32), wherein the linear consumer has a first chamber (38), having: a hydraulic machin...
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WO/2023/248680A1 |
This hydraulic drive device is for supplying a working fluid to a hydraulic cylinder having a head-side port and a rod-side port, and comprises: a hydraulic pump motor having a suction port and a discharge port; an electric motor that is...
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WO/2023/248579A1 |
[Problem] To provide a hydraulic drive device which can be regenerated and in which the size of a hydraulic pump motor can be reduced. [Solution] This hydraulic drive device supplies and discharges a working fluid to a hydraulic cylinder...
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WO/2023/248682A1 |
Provided is a hydraulic driving device which drives a hydraulic cylinder that supplies and discharges a working fluid to each of a head-side port and a rod-side port, said hydraulic driving device comprising: a hydraulic pump motor which...
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WO/2023/248681A1 |
This hydraulic drive device distributes a working fluid to each of a head-side port and a rod-side port to drive a hydraulic cylinder, the device comprising: a hydraulic pump motor which discharges a working fluid and is rotationally dri...
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