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WO/2020/070617A1 |
A sheet metal working machine (100) comprises a hydraulic drive system (1) to drive a plurality of working tools (51, 151, 61) in a separate and independent manner and perform respective machinings on a piece (200); the hydraulic drive s...
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WO/2020/071044A1 |
This hydraulic shovel drive system comprises: a first pump that supplies hydraulic oil to a boom cylinder through a boom control valve and supplies hydraulic oil to a bucket cylinder through a first bucket control valve; a second pump th...
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WO/2020/070614A1 |
A hydraulic drive system (1) associable with a multi-press punching apparatus (50) for operating in a separate and independent manner a plurality of punching tools (51) along respective operating axes (A), comprises a plurality of hydrau...
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WO/2020/070936A1 |
In a brake valve device (100), an adjustment mechanism (102) for adjusting the set pressure of a relief valve (105) has: a single free piston (122) which slides within a sleeve (121) according to pressure in a pair of main passages; and ...
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WO/2020/067084A1 |
Provided is a fluid circuit that uses a load sensing system and has high energy efficiency. The fluid circuit comprises: a pressure fluid source 2 for supplying a pressure fluid; a plurality of actuators 8, 9 connected to the pressure fl...
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WO/2020/066398A1 |
This air suspension system is provided with: an air suspension (1) which is interposed between a vehicle body and an axle, and which performs vehicle height adjustment in response to supply and discharge of air; a compressor (3) for comp...
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WO/2020/066225A1 |
Provided is a construction machine capable of accurately deriving operating characteristics in a high-speed region of a hydraulic actuator with less calibration operation. A controller (10) has a calibration mode for deriving an operatin...
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WO/2020/066483A1 |
Provided is a hydraulic drive device capable of a suitable hydraulic fluid supply when a traveling body of a work machine slips. The hydraulic drive device comprises a specific work actuator (27) that causes a work arm to perform a trave...
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WO/2020/059628A1 |
Provided are a multi-control valve unit having a simple hydraulic oil flow passage configuration, and a hydraulic drive device for a hydraulic excavator. In this multi-control valve unit, a pilot chamber forming member, provided internal...
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WO/2020/054643A1 |
Provided is a valve device that can suppress an influence on an operation of a spool and secure a sealing property of a sealing member. The valve device comprises: a pilot chamber cover that forms a pilot chamber to which a pilot pressur...
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WO/2020/054507A1 |
Provided is a construction machine that is capable of controlling, with a high degree of accuracy, branch currents flowing from a hydraulic pump to a plurality of hydraulic actuators. A controller (100) has a meter-out valve control unit...
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WO/2020/054323A1 |
Provided is a drive device (120) for a double-acting hydraulic cylinder (10) having an auxiliary mechanism part (lock mechanism part (35A)) that operates during a return operation by means of air pressure, said drive device (120) for a d...
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WO/2020/049668A1 |
A hydraulic drive device of an electric-powered hydraulic operating machine in which the flow rate of a hydraulic pump, which supplies hydraulic fluid to a plurality of actuators, is controlled by controlling the speed of an electric mot...
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WO/2020/044701A1 |
A fluid pressure control device (100) comprises, a control valve (31) that switches between delivering and discharging hydraulic fluid to and from a boom cylinder (10) in accordance with pilot pressure of a pilot chamber (32a), a first m...
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WO/2020/044783A1 |
A reverse-rotation prevention valve (100) has a spool (102) to the interior of which are provided a first communication path (151) for enabling communication between a first supply/discharge passage (111) and a first pressure chamber (12...
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WO/2020/035391A1 |
According to one embodiment of the invention the digital pump axis control system is a circuit being at least partially open. The circuit comprises: an electric engine, powering a first and a second hydraulic machine, wherein the first a...
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WO/2020/035398A1 |
An electrohydrostatic actuator system comprising: a volume- and/or speed-variable hydraulic machine which is driven by an electric motor, for providing a volumetric flow of a hydraulic fluid; a differential cylinder with a piston side an...
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WO/2020/031789A1 |
Provided is a construction machine capable of preventing the generation of surge currents and the malfunction of an attachment. In the present invention, a hydraulic shovel is provided with: an attachment driving actuator which is embedd...
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WO/2020/031816A1 |
A construction-machinery hydraulic circuit according to the present invention includes: a first pump line that connects a discharge port of a pump to a pump port of a first directional switching valve; a second pump line that is branched...
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WO/2020/031817A1 |
According to the present invention, left and right directional switching valves each have: a pump port that is connected to a pump; a first compensation port that is connected to an upstream side of a corresponding pressure compensation ...
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WO/2020/031974A1 |
Provided is a hydraulic drive device for a work machine with which the frequency of maintenance can be reduced. A controller (20) opens a first opening/closing valve (25a), closes a second opening/closing valve (25b), switches a first di...
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WO/2020/023756A1 |
Disclosed embodiments include hydraulic systems (220; 238; 305) which provide power to lift, tilt and auxiliary (e.g., implement) functions, including high-flow auxiliary functions, with increased efficiency. Disclosed embodiments incorp...
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WO/2020/020997A1 |
A hydraulic system having a hydraulic pump (31, 32), having a plurality of hydraulic loads (23, 24, 25, 26) and having a plurality of load-sensing valves (33, 34, 35) for adjusting the pump performance of the hydraulic pump (31, 32). An ...
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WO/2020/015383A1 |
An oil-electric hybrid servo hydraulic press machine, comprising a sliding block (1). The top of the sliding block (1) is connected below a sliding block cylinder; the sliding block cylinder comprises a servo electric cylinder (1b) locat...
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WO/2020/010635A1 |
Disclosed are a hydraulic control system and method for a large-angle slewing mechanism. The large-angle slewing mechanism comprises multiple hydraulic cylinders, with output ends of the multiple hydraulic cylinders being pivotally conne...
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WO/2020/011957A1 |
A control valve assembly for a load handling vehicle such as forklift comprises a valve body having a bore and a spool located within the bore that is axially movable along the bore between at least two operating configurations. The valv...
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WO/2020/012920A1 |
Provided is a work machine that can drive an actuator more quickly and accurately by maintaining high operability when an operator performs manual operations and by supplying a target flow rate accurately to the actuator regardless of lo...
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WO/2020/011959A1 |
A hydraulic system (1, 50) for a load handling vehicle comprises lifting actuator (2, C1) that operates in a load lifting mode in which a load is induced on the actuator, and a load lowering mode in which the actuator provides hydraulic ...
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WO/2020/007208A1 |
A hydraulic circulation system, comprising an oil tank (10), a valve stand (20), a circulation pipeline (30) and an execution mechanism (40), wherein the valve stand (20) is used for pumping oil in the oil tank (10) into the circulation ...
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WO/2020/008736A1 |
In a valve device (100), a travel control valve unit (130) has a communication passage for connecting the delivery passages (123) of left and right travel control valve units (130), and a spool (170) has a delivery-side land section (172...
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WO/2020/006932A1 |
A bucket leveling system for an aerial work truck, a main valve (28) being able to be a cartridge valve or a multi-way valve; the maximum load pressures on a telescopic cylinder (34) and a luffing cylinder (33) are both fed back to a loa...
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WO/2020/003811A1 |
The present invention addresses the problem of providing a construction machine capable of suppressing engine lug-down regardless of the content of an operation by an operator or the load state of a hydraulic actuator. A controller 50 ha...
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WO/2020/001908A1 |
Multi-purpose hydraulic system (10) for a motor vehicle, which comprises a primary hydraulic circuit, a secondary hydraulic circuit and a diverter valve (5). The primary hydraulic circuit comprises a primary hydraulic pump (1) and at lea...
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WO/2020/006538A1 |
A mobile hydraulic system includes a hydraulic actuator coupled to a load, and a control unit coupled to the load and/or to the hydraulic actuator. The control unit is adapted to anticipate an over-center transition of the load relative ...
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WO/2019/245370A1 |
Stepper motor with a housing 1,2,4,6,16, in which a cylindrical rotor 11,15 fixed on a central shaft 12 can rotate but not translate along an axial direction. There are cylindrical translators 9, 14 on both sides of the rotors 11, 15, wh...
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WO/2019/245959A1 |
The invention generally relates a linear or roto-linear actuator comprising a combination of electrical and hydraulic actuator components for providing a combined electric and hydraulic- driving force.
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WO/2019/240022A1 |
A selection system (100) for hydraulic circuits has: a cylinder selection processing unit (120); a database (DB8) in which information pertaining to a combination of a plurality of apparatuses is registered in advance; combination select...
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WO/2019/238682A1 |
The present disclosure relates to a hydraulic valve arrangement comprising a first pilot operated proportional directional control valve (10) having a first valve member (11) that is displaceable in a first and a second axial direction (...
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WO/2019/240023A1 |
A first fluid circuit (10A) is a fluid circuit of an air cylinder that comprises: an air cylinder (30) with a first air chamber (42a) and a second air chamber (42b) that are defined by a piston (38); a switching valve (16) that is switch...
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WO/2019/238946A1 |
The present disclosure relates to a hydraulic circuit (100), comprising: a hydraulic displacement unit (1) for driving an implement; a hydraulic machine (9) fluidly connected or selectively fluidly connected with the hydraulic displaceme...
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WO/2019/240133A1 |
Provided is a work machine with which the responsiveness of a hydraulic actuator can be improved when driving the hydraulic actuator via an electric lever-type operation device. In the present invention, a controller 100 further has: an ...
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WO/2019/224877A1 |
This hydraulic drive system for construction machinery is provided with: a swing motor; a swing operation device that outputs a swing operation signal according to the inclination angle of an operation lever; a swing direction switching ...
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WO/2019/225022A1 |
A drive device (10) for driving a fluid pressure cylinder (12) has an air supply source (52) which supplies air, a switching valve (14) which switches between the supply and discharge of the air to and from the fluid pressure cylinder (1...
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WO/2019/224879A1 |
This hydraulic drive system for construction machinery is provided with: a swing motor; a swing operation device that outputs a swing operation signal according to the inclination angle of an operation lever; a swing direction switching ...
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WO/2019/220954A1 |
This hydraulic shovel drive system is provided with a first pump connected to a boom main control valve and an arm auxiliary control valve by means of a first pump line, a second pump connected to a boom auxiliary control valve and an ar...
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WO/2019/220564A1 |
A hydraulic system comprising: an operation device; a control valve that increases the opening area of a passage for supplying hydraulic oil to a hydraulic actuator as an operation signal output from the operation device increases; a var...
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WO/2019/220565A1 |
This hydraulic system is provided with: a variable capacity pump; a valve unit that includes a plurality of control valves for a plurality of hydraulic actuators; a regulator that regulates the discharge flow rate of the pump so that the...
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WO/2019/216195A1 |
A valve device that makes a cylinder mechanism operate by switching the direction of an operating fluid that is supplied to the cylinder mechanism. The valve device has: a control valve that has a main spool that changes position by movi...
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WO/2019/214887A1 |
Valve arrangement for supplying a hydraulic consumer with pressure medium, which valve arrangement has two working connectors (A, B) for the fluid connection to the consumer, with a first control valve which - has a first feed line (24),...
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WO/2019/215883A1 |
A throttle check valve (26) comprises: a poppet valve body (31) on one end of which an orifice (32) is formed, and on a side of which holes (35) are formed; a plug (33) that has a tubular shape surrounding this poppet valve body (31), an...
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