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WO/2021/070828A1 |
This hydraulic drive device is provided with first and second air-liquid converters for converting air pressure supplied from an air pressure source into hydraulic pressure, a hydraulic actuator including first and second pressure chambe...
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WO/2021/069826A1 |
Wheeled vehicle (1) comprising a stabilising device (2) which comprises at least one leg (3) and a cylinder for actuating the leg (3) between an active position in which the leg is supported on the ground and an inactive position, the cy...
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WO/2021/065453A1 |
The robot device of the present disclosure includes at least one artificial muscle that operates by receiving a liquid supply and a liquid supply device that supplies and discharges the liquid to the artificial muscle, wherein the liquid...
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WO/2021/066029A1 |
Provided is a construction machine with which it is possible to push out a bucket in a straight line merely by an operator operating an arm in the push-out direction. When a straight-line trajectory is selected using a bucket trajector...
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WO/2021/059571A1 |
Provided is a work machine that is capable of preventing trapping of pump pressure. A hydraulic shovel comprises: a control valve that controls the flow of pressure oil from a hydraulic pump to a hydraulic actuator; an operation device...
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WO/2020/254900A9 |
Device for the sequential actuation of two or more cylinders, comprising: a first conduit (2), equipped with a first branch (21), arranged to be connected to a chamber of a first cylinder (10), and a second branch (22), arranged to be co...
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WO/2021/057727A1 |
A regeneration control hydraulic system, comprising at least one hydraulic pump, an actuator (7), a regeneration oil path (1), and a regeneration cutoff oil path (2). The regeneration oil path (1) is used for sending return oil as regene...
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WO/2021/059775A1 |
A hydraulic excavator 1 is provided with: an engine 16; a main hydraulic pump 17 driven by the engine 16; a plurality of hydraulic actuators driven by pressure oil discharged from the main hydraulic pump 17; a plurality of flow rate cont...
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WO/2021/059584A1 |
Provided is a work machine configured so as to enable the operation of a work device to be limited through machine control (MC), improve the responsiveness of a hydraulic actuator with respect to the operation of an operation device by a...
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WO/2021/059614A1 |
A main valve throttle (53) of a main valve (43) is configured of a lateral hole (53A) that communicates an inlet-side flow path (25) and an outlet-side flow path (27) via the inside of the main valve (43), and a groove portion (53C) that...
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WO/2021/059337A1 |
The present invention prevents the power consumption of a hydraulic pump from exceeding a predetermined value in a hydraulically driven device used in an electric hydraulic working machine that works by driving the hydraulic pump using a...
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WO/2021/054088A1 |
Provided is a construction machine capable of quickly adjusting the rotation speed of a swivel motor to a target rotation speed. A controller calculates a target rotation speed of a swivel motor on the basis of input from an operation ...
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WO/2021/049317A1 |
Provided is a work machine (100) capable of effectively discharging air from within the hydraulic circuit of a winch unit (10) capable of braking a winch drum (1) by receiving hydraulic oil. The work machine (100) comprises: a winch unit...
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WO/2021/046985A1 |
An electro-hydraulic servo actuator (100) for implementing long-path and high-frequency loading, and a control method. The actuator (100) comprises: a long cylinder and piston (1), a short cylinder and piston (2), a fixed end rod (3), lo...
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WO/2021/044783A1 |
An air cylinder (10) in which a flow rate controller (26, 26A) is built in, a head cover (14), and a rod cover (16), wherein a pilot air adjustment unit (40, 40A) is provided for guiding exhaust air to a switch valve (28, 28A) of the flo...
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WO/2021/044780A1 |
The present invention pertains to an air cylinder (10) in which flow rate controllers (24, 24A) are built into a head cover (14) and a rod cover (16), said flow rate controllers (24, 24A) being provided with a first flow rate adjustment ...
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WO/2021/045663A1 |
Hydraulic cylinder (1) comprising at least one cylinder housing (2), with a cylindrical inner space, and in this at least one movably arranged first piston (3) which divides the hydraulic cylinder into at least one first chamber (9) and ...
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WO/2021/044784A1 |
A flow rate controller (10) and a drive device (40) are provided with: a first flow passage (12) that is connected between an operation switching valve (38) and an air cylinder (30) and that supplies air to and discharges air from a cyli...
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WO/2021/044526A1 |
Provided are a multiple valve device that enables the discovery of contaminants mixed into a working fluid, and a cargo handling device equipped with this multiple valve device. The multiple valve device (10) is provided with: a priority...
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WO/2021/044781A1 |
Provided are a flow rate controller (22, 22A) and a drive device (20) wherein a housing (30) is provided with, in the interior thereof, a first flow passage (42), a second flow passage (44) provided adjacent to the first flow passage (42...
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WO/2021/044148A1 |
A hydraulic apparatus has a plurality of pump modules each of which is formed by a plurality of working chambers having a common high pressure manifold. A connecting circuit switchably connects pump modules to first and second hydraulic ...
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WO/2021/044782A1 |
A flow rate controller (12) and a drive device (10) are provided with: a cylinder flow passage (21) connected to an air cylinder (14); a main flow passage (22) for supplying air to and discharging air from the air cylinder (14); an auxil...
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WO/2021/039287A1 |
A hydraulic system (1A) according to one aspect includes: a plurality of control valves (4) interposed between a main pump (22) and a plurality of hydraulic actuators; and a plurality of solenoid proportional valves (6) respectively conn...
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WO/2021/039284A1 |
A hydraulic system (1A) for a construction machine according to one aspect includes: a plurality of control valves (41) interposed between a main pump (22) and a plurality of hydraulic actuators; and a plurality of first solenoid proport...
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WO/2021/039926A1 |
Provided is a construction machine in which lug down of an engine can be suppressed regardless of the operation content of an operator and the load state of a hydraulic actuator. On the basis of a required flow rate of the hydraulic ac...
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WO/2021/039286A1 |
This hydraulic system includes a turning motor (81), a mechanical brake (83), and a turning control valve (4t) interposed between a main pump (22) and the turning motor (81). A first pilot port of the turning control valve (4t) is connec...
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WO/2021/039285A1 |
A hydraulic system (1) for a construction machine, including: a plurality of control valves (41) interposed between a variable-capacity main pump (22) and a plurality of hydraulic actuators; and a first electromagnetic proportional valve...
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WO/2021/037382A1 |
A method of controlling a hydraulic actuator (40, 42), wherein the hydraulic actuator (40, 42) comprises a linear double-acting output member (46), and at least three working chambers (84) in fluid connection with the output member (46),...
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WO/2021/039283A1 |
In one aspect of the invention, a hydraulic system (1A) of a construction machine comprises a plurality of control valves (41) interposed between a main pump (22) and a plurality of hydraulic actuators, and a plurality of first electroma...
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WO/2021/039282A1 |
A hydraulic system (1A) for a construction machine according to one aspect includes: a plurality of control valves (41) interposed between a main pump (22) and a plurality of hydraulic actuators; and a plurality of first solenoid proport...
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WO/2021/039805A1 |
Provided is a construction machine in which traveling operability is not compromised when a compound action is performed in which a single-rod hydraulic cylinder is driven during a travel action. A hydraulic shovel comprises a controll...
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WO/2021/037339A1 |
A hydraulic system, mining machine and method of controlling a hydraulic actuator. The hydraulic system (HS) is provided with a control valve (23) for controlling movement direction and speed of a hydraulic actuator (HA) connected to the...
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WO/2021/031436A1 |
A differential control mold opening and closing control loop of a vulcanizing machine. The mold opening and closing control loop comprises a proportional valve (1), a balance valve (2), a mold opening and closing oil cylinder (3), and an...
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WO/2021/031639A1 |
A winch potential energy real-time recycling system and a control method therefor. Said system comprises a main pump (2), an auxiliary pump (18), a main reversing valve (4), a potential energy recovery reversing valve (13) and a balance ...
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WO/2021/029399A1 |
This excavator (100) is provided with: a lower traveling body (1); an upper rotating body (3) mounted on the lower traveling body (1); an engine (11) mounted on the upper rotating body (3); a main pump (14) driven by the engine (11); an ...
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WO/2021/025170A1 |
Provided is an excavator that suitably uses hydraulic fluid that flows out from a boom cylinder during excavation. The excavator comprises a boom, an arm, a boom cylinder that drives the boom, and an arm cylinder that drives the arm an...
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WO/2021/023072A1 |
Disclosed are a make-up and break-out device, a rotary hydraulic driving device, and a hydraulic cylinder synchronous positioning device, belonging to the field of oil and gas development. The make-up and break-out device comprises: a ba...
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WO/2021/022682A1 |
Disclosed is a method for combined control of the speed and the pressure of an orbital hydraulic press. A hardware system mainly comprises: a displacement sensor (1), used to measure displacement of a piston of a master cylinder; a maste...
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WO/2021/019129A1 |
The invention relates to a piston-cylinder assembly (10) of a hydraulic press, which comprises a basic cylinder (11 ) and a first and second piston (12, 13). A ring cylinder (14) is formed above the basic cylinder as a continuation of th...
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WO/2021/013295A1 |
The invention relates to a pneumatic or hydraulic piston rod cylinder (I) having a cylinder (2) and a piston (3) adjustable therein in the longitudinal directionr, which piston is coupled to a piston rod (4) protruding out of the cylinde...
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WO/2021/014330A1 |
A gas-hydraulic system (100) for pressurizing a working fluid comprising a main tank (7) containing a working fluid and comprising a maximum level switch ( 10) and a minimum level switch (11), a secondary tank (6) containing the same wor...
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WO/2021/014950A1 |
The ship steering machine (1) according to one embodiment of the present invention comprises: a hydraulic actuator (3) which rotates a rudder shaft (22) connected to a rudder plate (21); two axial piston-type hydraulic pumps (4) which ar...
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WO/2021/012101A1 |
A constant-pressure propulsion system for a rock drill rig, comprising a hydraulic motor, a propulsion hydraulic cylinder, an impactor hydraulic cylinder, a rotation pressure sensor, a propulsion pressure sensor, a rotary oil line electr...
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WO/2021/013296A1 |
The invention relates to a pneumatic or hydraulic piston rod cylinder (1) comprising a cylinder (2) and at least one first piston (3.1) which can be adjusted therein in the longitudinal direction thereof, and which is coupled to a piston...
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WO/2021/004397A1 |
A large flow valve-pump joint control emulsion pump station and a control method therefor, particularly suitable for use in the field of coal electromechanical equipment hydraulic systems. A valve-controlled liquid supply system is added...
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WO/2021/004657A1 |
The present disclosure relates to systems that use a single proportional valve to control raising and lowering of a load. The present disclosure also relates to proportional valves that provide proportional flow control in first and seco...
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WO/2021/003761A1 |
A hydraulic tension system of a direct-pulling cold/warm rolling tester, relating to the technical field of hydraulic control. The hydraulic tension system comprises a constant-pressure oil source system (45), a left tension control unit...
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WO/2020/260450A1 |
The present invention relates to a mobile work machine, in particular a wheeled loader, having a hydraulic circuit and having a pump (P) for conveying a hydraulic medium through the hydraulic circuit and having at least one control block...
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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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