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WO/2019/216193A1 |
An electromagnetic flow control valve that comprises: an inlet passage that connects an inlet port to a pilot pressure chamber; an outlet passage that connects the pilot pressure chamber to an outlet port; a fixed throttle that is provid...
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WO/2019/210341A1 |
The invention relates to a hydraulic system, more particularly for a lifting device, comprising: - at least one piston-cylinder assembly (1) for applying a force to at least one movable component, the at least one piston-cylinder assembl...
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WO/2019/207951A1 |
Provided is a fluid pressure control device including a first switching valve (51) provided downstream of a first travel control valve (11) in a first main passage (41) and having an opening position (51A) and a priority position (51B), ...
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WO/2019/208495A1 |
This fluid pressure supply device comprises a hydraulic pump of which the discharge capacity can be changed, an electric motor of which the rotational speed can be changed, a discharge capacity adjustment mechanism capable of adjusting t...
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WO/2019/198579A1 |
Provided is a low cost fluid pressure circuit which can, using a fixed displacement pump, smoothly control a fluid pressure actuator in response to an operation command, and which can effectively use energy. A fluid circuit (130) is prov...
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WO/2019/188061A1 |
A hydraulic circuit (100) is provided with: a first actuator (11); a second actuator (12); a hydraulic pump (13); a first direction switching valve (15); a second direction switching valve (16); a pilot pump (14); a first operation devic...
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WO/2019/186841A1 |
In the present invention, even when differential pressures before and after direction switching valves associated with respective actuators are extremely low, flow rate control of a hydraulic pump and diversion control of a plurality of ...
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WO/2019/188954A1 |
This railway vehicle vibration suppressing device is provided with an actuator (A1, A2) which is interposed between a vehicle body (B) of a railway vehicle and a bogie (T1, T2) and which is capable of being unloaded, and a controller (C)...
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WO/2019/187489A1 |
In the present invention, even when differential pressures before and after direction switching valves associated with respective actuators are extremely low, flow rate control of a hydraulic pump and diversion control of a plurality of ...
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WO/2019/188129A1 |
This air cylinder (22) is provided with: a cylinder tube (32), one end of which is blocked by a head cover (34) and the other end of which is blocked by a rod cover (36); a head-side air chamber (44) and a rod-side air chamber (42) that ...
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WO/2019/188127A1 |
An air cylinder fluid circuit (20) which is divided by a piston (38) into a first air chamber (42) and a second air chamber (44) is provided with: a changeover valve (30); a first air flow channel (24) disposed between the first air cham...
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WO/2019/178922A1 |
Provided is a hydraulic drive system for a barring device, comprising three or more main drive hydraulic cylinders, which are divided into two groups to provide a pulling and a pushing force for a driven impeller (10). The main drive hyd...
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WO/2019/180798A1 |
Provided is a construction machine which allows an improvement in energy efficiency in a horizontal pulling operation in which an arm pulling operation and a boom raising operation are simultaneously performed. If the boom raising operat...
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WO/2019/182090A1 |
This work vehicle is provided with a loading and unloading hydraulic circuit (A) including at least a main hydraulic pump (31), a lifting arm cylinder (8), and a control valve (32), an auxiliary hydraulic pump (31), a negative-type parki...
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WO/2019/176075A1 |
During operation of an operating device (24), target speeds of an arm cylinder (12) and a boom cylinder (11) are calculated in accordance with a distance D between a bucket tip (P4) and a target surface (60) so that an actuating range of...
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WO/2019/176076A1 |
Provided is a construction machine capable of driving each hydraulic actuator at an appropriate speed while suppressing the discharge flow rate of a hydraulic pump during both independent operation in which each hydraulic actuator is ind...
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WO/2019/171911A1 |
This railroad car vibration damping device (1) comprises: an actuator (A) which is installed in a railroad car and which has a cylinder body (Cy) that extends and contracts in accordance with the supply of working fluid thereto, a pump (...
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WO/2019/172131A1 |
A control valve (100) comprises: first and second pilot chambers (14, 15) facing both ends of a spool (12); a signal pressure path (18) for guiding the pilot pressure of each of the first and the second pilot chambers (14, 15), as the si...
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WO/2019/172130A1 |
A control valve (100) is provided with: a plurality of caps (101) mounted to one side surface (1a) of a valve housing (1); highest-pressure introduction passages (110) to which the highest of pressures in a plurality of pilot chambers (3...
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WO/2019/167890A1 |
This hydraulic system for a construction machine comprises: a pump which supplies working fluid to a hydraulic actuator; a control valve which has a bypass path and is positioned on a center bypass line extending from the pump to a tank;...
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WO/2019/168015A1 |
A control device generates an operation signal to control the pressure of hydraulic fluid further downstream than a slewing motor in a hydraulic device on the basis of the direction of a slewing body, slewing speed, and target stopping d...
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WO/2019/163990A1 |
This hydraulic system is provided with: a running motor; a running pump connected to the running motor to form a closed-loop and driven by an engine; a working pump that is driven by the engine, suctioning suctions hydraulic oil from a t...
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WO/2019/162097A1 |
A valve device having a feed connector (ZA) of a feed side for the supply of a hydraulic consumer which can be connected to the feed connector (ZA) with pressure fluid, an outlet connector (AA) of an outlet side for the discharge of pres...
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WO/2019/158989A1 |
The invention relates to an apparatus for regulating the stroke of double-acting hydraulic actuators of the type used for hydraulic actuation of manoeuvring members of operating machines, in which the single double-acting hydraulic actua...
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WO/2019/159495A1 |
Provided is a slewing-type hydraulic work machine in which, during a slewing-boom lifting operation, a boom can be driven at preferable speed while slewing torque for starting slewing is ensured. The hydraulic work machine is provided wi...
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WO/2019/159550A1 |
A slewing-type work machine (100) is provided with: a slewing-state determination unit (73) that determines whether or not slewing of an upper slewing body (2) is in a deceleration state; and a capacity control unit (72) that controls a ...
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WO/2019/157429A1 |
An example valve assembly is configured: generate a valve load-sense pressure signal indicative of a pressure level at a workport of an actuator; generate a pilot fluid signal to be communicated to a worksection of a valve assembly to en...
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WO/2019/149751A1 |
The invention relates to a control valve assembly (1) for an indirect pneumatic control and to a method for controlling a working fluid pressure. The aim of the invention is to provide a control valve assembly (1) and a method for contro...
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WO/2019/150748A1 |
A valve device (100) is provided with: a relief valve (30F) which opens and releases operating fluid when pressure within a fluid pressure circuit (C3) reaches a predetermined pressure; a tank passage (15) connected to a tank (T); a main...
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WO/2019/144615A1 |
A hydraulic support system for a magnetic levitation train and the magnetic levitation train, the system comprising hydraulic support devices (1), a control panel and a hydraulic station, wherein the hydraulic station is fixed to the bot...
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WO/2019/142840A1 |
Provided is an air pressure system that controls an air compressor in real time for a plurality of terminals in accordance with the actual manner in which compressed air is used. Furthermore, when there is a sudden change in pressure los...
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WO/2019/142244A1 |
Provided is a construction machine which is provided with a hydraulic closed-circuit for driving a single-rod type hydraulic cylinder directly by means of a bidirectionally tiltable variable-capacity pump, and with which it is possible t...
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WO/2019/142481A1 |
Provided is a slewing hydraulic work machine capable of high efficiency slewing boom lifting work. A hydraulic work machine comprises an upper slewing body, a work device including a boom, a hydraulic pump (31), a variable capacity slewi...
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WO/2019/139104A1 |
The purpose of the present invention is to provide construction machinery with which a pressure sensor can be easily and reliably calibrated, and a hydraulic actuator can be reliably controlled. A controller increases a discharge pressur...
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WO/2019/138636A1 |
In order to suppress an increase in the size and cost of a hydraulic device to which the present invention is applied, a direction switching valve 10, when a pump oil path 21 is connected to a rod oil path 23, is placed in a state in whi...
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WO/2019/138611A1 |
This fluid pressure control device (100) is provided with a neutral passage (13), a control valve (20) provided in the neutral passage (13), a supply passage (14), and a discharge passage (15). The control valve (20) comprises: a switchi...
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WO/2019/138610A1 |
This fluid pressure control device (100) is provided with a switching valve (40), a main pilot passage (17), and a sub pilot passage (43). The switching valve (40) is switched to a communication position (40b) when a work fluid has been ...
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WO/2019/138612A1 |
This control valve (60) is provided with a housing (70) in which a first and a second supply port (71d, 71e), a first and a second actuator port (71h, 71i) and a pilot port (71j) are formed, and a spool (80) which is slidably housed in t...
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WO/2019/138609A1 |
This fluid pressure control device (100) is provided with a switching valve (40), a main pilot passage (17), and a sub pilot passage (43). The switching valve (40) is switched to an open position (40b) when a work fluid has been supplied...
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WO/2019/137952A1 |
The invention relates to a hydraulic system for a working device, in particular a piling or drilling device for attaching to an excavator, comprising a hydraulic motor unit, wherein the hydraulic motor unit has a plurality of hydraulic m...
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WO/2019/131674A1 |
This hydraulic drive device is provided with a third boom direction control valve 82 and a rotation direction control valve 81 connected to a third hydraulic pump 33. The hydraulic drive device is further provided with: a second backup d...
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WO/2019/128013A1 |
A reverse brake control valve for a hydraulic walking system, comprising a valve body (15), a two-position three-way solenoid valve A (1) and a two-position three-way solenoid valve B (3) being provided in the valve body (15), and both t...
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WO/2019/130898A1 |
Provided is a work machine capable of preventing cavitation when a reverse lever operation, which issues an instruction to swing in a direction opposite to a swing direction during swinging deceleration, is performed in a hydraulic close...
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WO/2019/121416A1 |
The present invention relates to an actuating drive having a variable-speed pump, as used, for example, in steam turbines, gas turbines and die casting machines. The electrohydrostatic actuating drive (10) has a variable-volume and/or va...
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WO/2019/121770A1 |
The present invention concerns a hydraulic pressure amplifier device comprising a casing (10) having two chambers (12, 14) of different cross-sections which house a staged piston (20) comprising two piston sections (22, 24) with cross-se...
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WO/2019/120653A1 |
The invention relates to a piston-cylinder assembly (1), comprising a cylinder housing (3), in which a main piston (2) and at least one dragg piston (11, 12) are axially slidably accommodated. The main piston (2) divides a piston chamber...
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WO/2019/112063A1 |
This excavator (100) comprises: a lower belt (1); an upper rotating body (3); an engine (11); a main pump (14); a hydraulic oil tank (T); a plurality of hydraulic actuators; and a hydraulic circuit connected to the main pump (14). The hy...
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WO/2019/110122A1 |
The invention provides an implement attachment device (1000), for selectively attaching an implement to a working machine, comprising - a hydraulic cylinder (1100) comprising a cylinder housing with first and second longitudinal ends, a ...
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WO/2019/106831A1 |
This working machine is provided with: first and second hydraulic motors; first and second hydraulic pumps provided to supply hydraulic oil to the respective corresponding first and second hydraulic motors; first and second swash plate a...
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WO/2019/103001A1 |
This hydraulic drive system is provided with a hydraulic pump, a boom control valve, a pivot control valve, a boom operating unit, a pivot operating unit, and a drive control unit, wherein the drive control unit adjusts a pivot drive com...
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