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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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WO/2023/241843A1 |
The invention relates to a volume flow supply, in particular for closed center LS systems (10), comprising a pressure supply device (12) and a pressure balance as components of a supply system for supplying fluid to a load (18) which can...
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WO/2023/237526A1 |
The invention relates to a hydraulic system having a hydraulically actuable working cylinder (10) which has a cylinder housing (12) with a piston-rod unit (14) that is guided in longitudinal movement therein, is actuable in opposite dire...
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WO/2023/238560A1 |
A control valve (101) comprises a solenoid proportional valve-equipped cap (100) that has a pilot cap (10) including: a primary pressure passage (41) that guides a working fluid at a primary pressure to the solenoid proportional valve; a...
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WO/2023/239659A1 |
A hydraulic control system includes a plurality pumps, a plurality of consumers selectively fluidically coupled to the plurality of pumps, and a controller in communication with the plurality of pumps and the plurality of consumers. In o...
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WO/2023/232034A1 |
Provided are a hydraulic system and a work machine. The hydraulic system, used for controlling a hydraulic execution mechanism of the work machine, comprises a first hydraulic pump, a second hydraulic pump, a valve assembly and a control...
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WO/2023/229407A1 |
The present invention relates to a boom energy and swing energy recovery system for mobile device-linked construction equipment and relates to a boom energy and swing energy recovery system for mobile device-linked construction equipment...
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WO/2023/229408A1 |
The present invention relates to a boom energy recovery hydraulic system for construction machinery and, more particularly, to a boom energy recovery hydraulic system for construction machinery for recovering boom energy discarded when a...
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WO/2023/229409A1 |
The present invention relates to a hydraulic system for recovering construction machine boom potential energy, and to a hydraulic system for recovering construction machine boom potential energy, the system recovering boom potential ener...
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WO/2023/221434A1 |
A shield construction control system, a control method, and a tunnel boring machine. The shield construction control system comprises a control assembly (100). The control assembly (100) comprises: at least two thrust cylinder groups (4)...
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WO/2023/219015A1 |
A drive control device (101) of a rotating work machine (100) comprises: a compensation control valve (33) which is interposed between a hydraulic pump (22) and a first actuator (7), and for which the degree of opening can be adjusted so...
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WO/2023/206747A1 |
The present disclosure relates to the technical field of hydraulic control systems, and provides a multi-stage hydraulic speed regulation system and a hydraulic support. In the multi-stage hydraulic speed regulation system disclosed by e...
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WO/2023/202985A1 |
The present invention relates to a drive unit for rotating and hydraulically controlling a reciprocating tool, and a method for controlling such a unit, the unit comprising a hydraulic motor (3) for driving the tool, an oil tank (4), a p...
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WO/2023/197470A1 |
An engine runaway prevention safety control system. The system comprises an engine (1), an auxiliary pump (4), a closed pump (6), a loading pump (11) and a winch motor (9). A real-time working state of a main machine is monitored in real...
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WO/2023/193822A1 |
A multi-stage buffer hydraulic cylinder for a wave energy power generation device, and a control method. A built-in fixing rod (11) is arranged inside a hydraulic cylinder barrel (1) and is nested in a piston rod (9), and an inner cavity...
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WO/2023/188642A1 |
This hydraulic driving system for a construction machine comprises a pump control device that performs load sensing control of a hydraulic pump such that the discharge pressure of the hydraulic pump is higher than the maximum load pressu...
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WO/2023/189508A1 |
A directional control valve (1) includes: a housing (2) including a spool hole, a pump flow channel (3), a tank flow channel (4), and a pair of supply/discharge flow channels (5A, 5B); and a spool (6) inserted into the spool hole. The sp...
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WO/2023/189421A1 |
Provided is a work machine capable of appropriately switching between prevention of reduction of riding comfort caused by inertial force generated when a hydraulic actuator is braked, and work using inertial force. In this work machine...
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WO/2023/185114A1 |
A control method for an engineering device, and a processor and an engineering device. The engineering device comprises an engine, a proportional pressure reducing valve (21), a plunger pump (18) and a control valve (15), wherein the con...
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WO/2023/191084A1 |
A control device of this working machine: calculates a target speed of a fluid pressure actuator in accordance with an operation signal from an operating device; calculates a target thrust or a target torque of the fluid pressure actuato...
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WO/2023/191014A1 |
This work machine comprises: a flow rate control valve that controls the flow rate of a working oil to be supplied from a hydraulic pump to a hydraulic cylinder; an electromagnetic valve that generates an operation pressure for operating...
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WO/2023/189867A1 |
A manifold (33) of a closed-circuit control valve apparatus (32) disposed rearward of a left-side revolving hydraulic motor (8) comprises: a valve attachment area (33E) that is provided in a left-right-direction central portion of the ma...
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WO/2023/190381A1 |
A plurality of control valves (39A-39D, 40A-40D, 41A-41D, 42A-42D, 43) are arranged so as to be aligned in the horizontal direction and the vertical direction in the planes of a first attachment surface (38C) and a second attachment surf...
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WO/2023/185080A1 |
Disclosed in the present invention are a blast furnace body jacking and sliding device, system and method. The device comprises a sliding groove, a sliding shoe and a push-pull device; the sliding shoe and the push-pull device are contro...
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WO/2023/189681A1 |
This work machine comprises a flow rate control valve as a flow rate control mechanism that controls the flow rate of pressure oil from a hydraulic pump to a hydraulic actuator via a first control valve. When pressure oil is supplied to ...
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WO/2023/182010A1 |
The purpose of the present invention is to provide a work machine in which the tracking of a drive speed to a target speed of a hydraulic actuator can be improved. To this end, a controller: calculates a target speed for a boom in accord...
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WO/2023/179803A1 |
A hydraulic load hierarchical control system and method for an indirect wave energy apparatus. The system comprises a first hydraulic cylinder group (1), a second hydraulic cylinder group (2), a third hydraulic cylinder group (3), a high...
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WO/2023/176031A1 |
Provided is a valve block for a multi-control valve device in which a plurality of valve blocks are aligned in a predetermined direction, the valve block comprising: a block body; first and second check valves that allow hydraulic fluid,...
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WO/2023/176318A1 |
The present invention relates to a hydraulic system having a load sensing function, and tries to prevent a hunting state, improve machining, and save driving power of a hydraulic pump. The hydraulic system comprises a pump operating unit...
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WO/2023/176685A1 |
A load retention mechanism (20) has a switching valve (22) for switching the operation of an operation check valve (21). The switching valve (22) has a piston (50) that, upon reception of pilot pressure, imparts thrust to a spool (56); a...
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WO/2023/176732A1 |
Provided is a hydraulic drive device for individually supplying hydraulic fluid to a travel motor and a cargo handling actuator, the hydraulic drive device including: a hydraulic pump that discharges the hydraulic fluid; a travel system ...
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WO/2023/174725A1 |
The invention relates to a valve module system (1) for providing a compressed-air consumer (82) with compressed air, wherein valve modules (4) can be provided with differently configured channel plates (5) for the purpose of fluidic comm...
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WO/2023/176731A1 |
This hydraulic drive apparatus supplies a hydraulic fluid to a traveling motor and a cargo-handling actuator, and comprises: a hydraulic pump for discharging a hydraulic fluid; a flow dividing valve that divides a pump passage to be conn...
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WO/2023/176686A1 |
A load holding mechanism 20 has a switch valve (22) that switches operation of an operation check valve (21). The switch valve (22) is provided in a first drain passage (76a) connected to a pilot chamber (23), and has a gas release valve...
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WO/2023/175252A1 |
The invention relates to a power cylinder (V) comprising a body (100), a rod (200) and at least one piston (300) fixed to the rod, the piston (300) and the associated rod (200) moving in the chamber at least in one direction under the ac...
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WO/2023/176733A1 |
This hydraulic drive device supplies a working fluid to each of a travel motor and a cargo handling actuator, and comprises: a hydraulic pump that discharges the working fluid; a travel system hydraulic circuit that is connected to a fir...
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WO/2023/174643A1 |
The invention relates to a valve module system (1) for providing a compressed-air consumer (82) with compressed air, wherein valve modules (4) are provided with differently configured channel plates (5) for the purpose of fluidic communi...
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WO/2023/162883A1 |
Provided is a fluid pressure circuit that can save energy. A fluid pressure circuit 130 comprises a fluid supply source 2 and a cylinder device 5, and has: a valve 91 that causes a portion of a return fluid from the cylinder device 5 t...
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WO/2023/162684A1 |
A work machine comprises a hydraulic actuator, a closed circuit pump that is connected to the hydraulic actuator in a closed circuit and that supplies and discharges hydraulic oil to and from the hydraulic actuator, an open circuit pump ...
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WO/2023/160239A1 |
A descending hydraulic-control method, a descending hydraulic-control system and engineering machinery. The descending hydraulic-control method comprises: acquiring a pressure value of a rodless cavity of a luffing cylinder; when the pre...
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WO/2023/162884A1 |
Provided is a fluid pressure circuit which can suppress excessive feeding of a fluid to a main flow path of a switching valve side. A fluid pressure circuit 130 comprises: a fluid feed source 2; an actuator device 5 operated by means o...
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WO/2023/160245A1 |
A throttling control-based pressure stabilization system for a hydraulic excavator and a use method therefor. A primary pump (1) is connected to a pump-controlled proportional valve YI (15); a connecting end of a selector valve (11) is c...
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WO/2023/158928A1 |
An actuator includes a primary piston and a secondary piston axially movable together in a cylinder assembly; a plurality of chambers comprising: a first chamber, a second chamber, a third chamber, and a fourth chamber, wherein when flui...
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WO/2023/156185A1 |
Throttle valve arrangement for hydrostatic units, comprising a valve housing with a through hole in which a cylindrical bushing is inserted, whose axial openings form a discharge port and a charge port of the throttle valve. An undercut ...
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WO/2023/151196A1 |
A hydraulic system and a rotary drilling rig. The hydraulic system comprises: a main pump (10); an auxiliary valve group (20), an inlet (21) thereof being in communication with the main pump; a winch motor (30), a working oil port (22) o...
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WO/2023/150448A1 |
An example valve includes a piston configured to block fluid flow from a first port of the valve to a second port of the valve when the valve is in a closed position; a relief mode spring applying a first biasing force on the piston in a...
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