Login| Sign Up| Help| Contact|

Patent Searching and Data


Matches 101 - 150 out of 33,226

Document Document Title
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...  
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.  
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 ...  
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...  
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...  
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...  
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...  
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...  
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...  
WO/2018/028832A4
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...  
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...  
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...  
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...  
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, ...  
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...  
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...  
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...  
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...  
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...  
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...  
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 ...  
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...  
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...  
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 ...  
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 ...  
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...  
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...  
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 ...  
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 ...  
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...  
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...  
WO/2017/212918A1
A pump device (100) is provided with: a variable capacity-type first pump (10); a tilt actuator (15) that controls the tilt angle of a swash plate (11) in the first pump (10) in accordance with a control pressure (Pcg); a regulator (60) ...  
WO/2017/213027A1
In order to enhance the responsiveness of an electromagnetic valve device to an operation, this work machine is provided with: an electromagnetic valve device which controls the flow of a pressure oil supplied from a hydraulic pump to a ...  
WO/2017/213571A1
A carrier comprising a hydraulic cylinder having a piston, a controller and a piston position sensor, wherein the carrier is arranged to carry an accessory through the use of the hydraulic cylinder and wherein the controller is configure...  
WO/2017/210450A1
A stage assembly (10) for positioning a workpiece (22) includes a stage (14), a base (12), a fluid actuator assembly (24), and a control system (20). The fluid actuator assembly (24) moves the stage (14) along the movement axis (30) rela...  
WO/2017/204698A1
The present invention relates to a hydraulic system (34) comprising a first actuator (36), a first pump assembly (38) and a first hydraulic circuit (40) for providing hydraulic fluid from the first pump assembly (38) to the first actuato...  
WO/2017/198725A1
Hybrid multistage systems and methods for converting the potential energy of a pressurised gas, particularly air, into mechanical work of two rotating shafts (L.16 and H.10) when operating in expansion mode, and for producing compressed ...  
WO/2017/198420A1
The invention relates to a piezohydraulic actuator (1) which is formed as a system having four chambers, wherein a first chamber is a drive bellows (3) which is movable by a piezo actuator (5) and which is filled with a hydraulic fluid (...  
WO/2017/200440A1
The present disclosure relates to a fluid actuator arrangement (100)and a method for control of a fluid actuator arrangement. The fluid actuator arrangement comprises a piston rod member (101),at least two cylinders (105, 106) each said ...  
WO/2017/200450A1
A operator supporting electrohydraulic drive and control system based on, position sensors (8) (9), a electronic control unite ECU (2), a recovery, storing and re-use system for energy, and with actuator (3) (4) and the drive control val...  
WO/2017/200441A1
The present invention regards a system and a method for providing a motion of an aircraft secondary control member (111, 611) incrementally in steps. An aircraft secondary control system comprises a rod arrangement (109, 609) of a drivin...  
WO/2017/195716A1
Provided is a crane 1 constituting a hydraulic system H that includes: actuators 25, 35, 45; direction switching valves 20, 30, 40 that switch the flow direction of an operating fluid for actuating the actuators 25, 35, 45; and proportio...  
WO/2017/195786A1
An actuator device (10) is provided with: a piston (21), which is housed in an internal space, and which forms, with a cylinder (20), a pair of pressure chambers (24, 25), said piston relatively moving with respect to the cylinder; a fir...  
WO/2017/193207A1
A pneumatic engine includes a plurality of pneumatic motors and an engine drive shaft. Each motor has a motor gas inlet, a motor gas outlet, and a rotor driven by gas flow between the motor gas inlet and the motor gas outlet. The engine ...  
WO/2017/191367A3
The object of the invention is a transmission arrangement for a moveable device, such as a door (1 ) opening mechanism (2) and a method for using a device moved with a hydraulic cylinder (3). The method comprises at least the following s...  
WO/2017/190298A1
A hydraulic actuator drive mechanism (200) for a wheel loader (100), which is configured such that the wheel loader (100) can be moved to a high altitude place to perform a work even without replacing an existing hydraulic pump with a hy...  
WO/2017/191367A2
The object of the invention is a transmission arrangement for a moveable device, such as a door (1 ) opening mechanism (2) and a method for using a device moved with a hydraulic cylinder (3). The method comprises at least the following s...  
WO/2017/192303A1
A hydraulic system includes one or more hydraulic subsystems that have a source of additional flow for supplying an auxiliary system. The hydraulic system may include one or more actuator systems, a boost system, and a further hydraulic ...  
WO/2017/188460A1
This control system is equipped with: an engine; a first hydraulic pump and a second hydraulic pump that are driven by the engine; an opening/closing device that is provided to a flow passage connecting the first hydraulic pump and the s...  
WO/2017/188193A1
This control system comprises: a distribution flow rate calculation unit that calculates a distribution flow rate of an operating fluid, said operating fluid being supplied to each of a first hydraulic actuator and a second hydraulic act...  

Matches 101 - 150 out of 33,226