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WO/2018/073152A1 |
The invention relates to a hydraulic drive for a hydraulic spindle, such as a die cushion device of a press machine for example, comprising a fluid pump for providing a volumetric flow for a drawing process from a fluid supply to a hydra...
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WO/2018/075241A1 |
Methods and apparatus of stabilizing a valve positioner when testing a solenoid valve are disclosed. An example apparatus includes a solenoid valve (202) and a valve positioner (106) fluidly and communicatively coupled to the solenoid va...
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WO/2018/069128A1 |
The invention relates to a hydromechanical blocking cylinder (10) comprising a piston (22) which can be hydraulically actuated in a cylindrical tube (112) and a threaded portion (23) of which engages a threaded portion (31) on a spindle ...
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WO/2018/071412A1 |
A hydraulic control valve maintains the pressure at a control port at a desired percentage of the pressure at two other ports as the pressure at the two other ports varies. Upon the pressure at the control port reaching a predetermined p...
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WO/2018/068876A1 |
The invention relates to a discharge pressure scale (30) consisting of at least one valve housing (41) having at least three fluid connection points in the form of a functional connector (A), a return flow connector (T) and a control con...
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WO/2018/066310A1 |
A control valve (14) configuring an intermittent air-generating device (10) is made from a five-port valve, the inlet port (24) of which is connected to a fluid supply source (12) and the outlet port (26) is connected to an air-spraying ...
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WO/2018/065670A1 |
The invention concerns an arrangement for controlling a hydraulic actuator (10) in a working device (42), which arrangement includes one or more hydraulic actuators arranged to drive a moving work element (43) belonging to the working de...
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WO/2018/065130A1 |
The invention relates to an electrohydraulic drive unit comprising: a cylinder-piston assembly (1), having a piston-side first hydraulic working chamber (5) and a piston-rod-side second hydraulic working chamber (6); a tank (4); a hydrau...
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WO/2018/061132A1 |
This work vehicle is provided with: an engine; a work device; a hydraulic cylinder that drives the work device; a main hydraulic pump that is driven by the engine so as to supply pressure oil to the hydraulic cylinder; an operation devic...
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WO/2018/061128A1 |
The present invention is provided with: a pump horsepower control valve (22) that applies, in an opposing manner, a first impelling force determining the limit horsepower (F) of a hydraulic pump and a second impelling force caused by a d...
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WO/2018/058168A1 |
An apparatus for actuating a hydraulic cylinder comprising feed and return hydraulic hoses, extend and retract hoses, a hydraulic pump, a directional valve and control means. The feed and return hydraulic hoses are each removeabley conne...
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WO/2018/064148A1 |
A selector control that is manually operable by a user for activating or deactivating a primary control or a secondary control. The selector control may include a first state for activating the primary control and deactivating the second...
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WO/2018/056037A1 |
A cylinder main body (36, 136) of a fluid pressure cylinder (20, 20A, 120, 120A) includes: a switch valve (24, 124), a check valve (30, 130), a flow path (60, 62, 64, 68, 80) communicating a high pressure air supply source (26, 126) with...
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WO/2018/056036A1 |
A fluid pressure cylinder driving device (20, 20A to 20F) includes a switch valve (24), a high pressure air supply source (26), an exhaust port (28) and a check valve (30). When the switch valve (24) is at a first position, a head side c...
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WO/2018/055723A1 |
In order to avoid reaching an overload relief set pressure and suppress switching shock, thereby ensuring good operability in a hydraulic energy recovery device wherein return oil in a hydraulic cylinder is pressurized and recovered, thi...
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WO/2018/055696A1 |
This working vehicle is provided with: a discharge oil passage (10) through which hydraulic oil discharged by a first hydraulic pump (2) to drive a bucket flows; a discharge oil passage (11) through which hydraulic oil discharged by a se...
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WO/2018/055205A1 |
The invention relates to the adjustment of a vehicle flap of an agricultural vehicle, watercraft, or airplane using at least two linear cylinders, wherein each linear cylinder has at least two hydraulic chambers which can be filled with ...
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WO/2018/055298A1 |
The invention concerns a hydraulic control system (1) comprising a plurality of hydraulic cylinders (A, B) intended to be actuated in a synchronised manner, each hydraulic cylinder comprising a barrel having an internal space and a pisto...
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WO/2018/051670A1 |
Provided is a device that makes it possible to accelerate a pinching operation with a high degree of freedom, without entailing significant pressure loss. A pinching device is provided with: a pinching device body (20) that includes a pa...
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WO/2018/047647A1 |
This damping valve (DV) comprises: a damping force adjusting path (TP) and a fail path (FP) that are arranged in parallel; a downstream path (DP) that is connected to the damping force adjusting path (TP) and the fail path (FP) on the do...
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WO/2018/043217A1 |
Provided is a construction machine in which a simple configuration can be used to inexpensively implement the switching of modes related to the speed of a travel motor, and the switching of modes related to priority levels for the supply...
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WO/2018/039791A1 |
A hydraulic system includes two or more linear hydraulic actuators and is operable in, and is switchable between, a hydrostatic operating mode and a non-hydrostatic operating mode.
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WO/2018/043401A1 |
This hydraulic drive system is provided with: a hydraulic actuator; a control valve for controlling the supply and discharge of hydraulic oil to and from the hydraulic actuator; a pilot operation valve connected to an operation valve by ...
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WO/2018/038608A1 |
The invention relates to a pneumatic stepper motor, comprising: - a housing, said housing accommodating at least part of: - a rack or geared axle comprising a plurality of gear elements; and - two pistons, each comprising at least two te...
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WO/2018/037925A1 |
Provided are: an energy regeneration device that can regenerate the energy of working fluid that is discharged from an actuator while controlling the flow rate of the working fluid; and a work machine that comprises the energy regenerati...
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WO/2018/037567A1 |
A control system is provided with: a first hydraulic pump and a second hydraulic pump; a flow channel connecting the first hydraulic pump and the second hydraulic pump; an opening/closing device provided in the flow channel to open and c...
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WO/2018/038231A1 |
A neutral valve according to the present invention comprises a spool that is inserted in a housing so as to be capable of movement in a prescribed direction and that moves between a neutral position at which a first port and a second por...
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WO/2018/037924A1 |
Provided are: an energy regeneration device that can regenerate the energy of working fluid that is discharged from an actuator while controlling the flow rate of the working fluid; and a work machine that comprises the energy regenerati...
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WO/2018/034017A1 |
The purpose of the present invention is to suppress lug down that occurs during a forward/backward movement switching operation or excavation work, and to enable the movement of a work vehicle to be made smoother. Provided is a work vehi...
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WO/2018/029019A1 |
The at least one electrohydraulic drive unit (6) of a machine tool having a tool which can be moved up and down comprises an upright, double-acting hydraulic cylinder/piston arrangement (7) with a piston (13) which projects downwards out...
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WO/2018/028832A1 |
In the case of an, in particular, pressure-accumulator-free hydraulic drive arrangement (10) for and comprising a consumer, in particular for presses, having a double action piston/cylinder arrangement (20) which comprises at least one r...
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WO/2018/025072A1 |
A position actuator includes a cylinder housing forming a fluid chamber having a first portion and a second portion, a movable main piston disposed in the cylinder housing between the first portion and the second portion, and a piston ro...
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WO/2018/025964A1 |
Provided are a hydraulic control valve and a hydraulic control circuit with which pressure loss of return oil during a contraction operation of a hydraulic cylinder can be reduced without providing a quick return circuit on the outside, ...
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WO/2018/025546A1 |
A crusher (9) has a switching valve (24) that switches the state of a hydraulic circuit (5) in the crusher (9) so as to: connect a second cylinder (16B) head-side chamber and a housing chamber (S1) when a crushing arm is rotated in the o...
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WO/2018/025071A1 |
A position actuator includes a cylinder housing forming a fluid chamber having a first portion and a second portion, a movable main piston disposed in the second portion, a piston rod firmly attached to the main piston and extending thro...
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WO/2018/024790A1 |
To provide a pump control device and a pump control method enables to change the setting of a pump flow. The controller (34) is to obtain the sum total value and the maximum value of the demanded flows from the respective hydraulic actua...
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WO/2018/021321A1 |
This controller unit is provided to a hydraulic drive system for an operating machine that moves a structure using an actuator by supplying a hydraulic fluid to the actuator. The controller unit has: a gyro sensor that outputs a signal c...
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WO/2018/020689A1 |
A control system for controlling a work machine equipped with a work implement that comprises a plurality of elements and with a plurality of actuators that drive the plurality of elements, said control system comprising: a first hydraul...
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WO/2018/020757A1 |
A damping device (1) for a railway vehicle is provided with: an actuator (A); and a control unit (C) for controlling a pump (12), and is adapted to control the rotational speed (Rm) of the pump (12) on the basis of the vehicle speed of t...
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WO/2018/021288A1 |
The purpose of the present invention is to provide an excavator that can suppress the deterioration of responsiveness of bleed-off control when hydraulic fluid is supplied to a plurality of directional control valves in parallel through ...
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WO/2018/011975A1 |
An electro hydrostatic actuator system (1) comprising: a hydraulic actuator (2); a plurality of hydraulic supply sources (31, 32); and a hydraulic circuit (33). The hydraulic supply sources respectively have hydraulic pumps (321, 322), e...
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WO/2018/012264A1 |
Provided is construction machinery that can detect in real time during work that an excess flow control valve is stuck open without decreasing the speed of work. The construction machinery is provided with: an excess flow control valve c...
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WO/2018/008190A1 |
A work machine is provided which, by suppressing speed variation of a hydraulic actuator accompanying hydraulic oil regeneration during implementation of machine control, can improve work efficiency while maintaining control accuracy of ...
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WO/2018/003753A1 |
A cylinder drive device (100) is provided with an electric motor (30), a pump (20), a main passage (80a) and main passage (80b), a hydraulic cylinder (10), an operate check valve (60b) and operate check valve (60a), and a throttle valve ...
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WO/2018/001388A1 |
A high-efficiency bending machine bending method, wherein an oil inlet of an oil pump (2) is connected to an oil tank (16), an oil outlet of the oil pump (2) is connected to a P port of a three-position four-way electromagnetic reversing...
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WO/2018/003403A1 |
A fluid pressure control device (100) is provided with a first duct passage (31) that connects first duct ports (11a)-(17a) to each other, a second duct passage (32) that connects second duct ports (11b)-(17b) to each other, a connecting...
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WO/2017/221524A1 |
[Problem] To provide a speed controller that can be attached to a fluid pressure cylinder in a compact manner. [Solution] A bulb body (11) of the speed controller has: a main body (12) that extends along a first axis (L1); and a fitting ...
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WO/2017/221758A1 |
In this hydraulic drive system, a plurality of loading system drive devices adjust the flow rate of the hydraulic fluid flowing to a loading system actuator from a loading system pump, and a steering system drive device adjusts the flow ...
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WO/2017/212919A1 |
A pump device (100) is provided with: a tilt actuator (15) that controls the tilt angle of a swash plate (11) in a variable capacity-type first pump (10); a regulator (60) that adjusts a control pressure (Pcg) in accordance with the pres...
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WO/2017/212709A1 |
In order to achieve both actuator responsiveness to operation and front control functionality, provided is a work machine equipped with a front control device that calculates a limit command value for limiting operation of a front work d...
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