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Matches 1 - 50 out of 3,038

Document Document Title
WO/2018/193807A1
This fluid pressure control device (100) is provided with a supply passage (21), a discharge passage (22), actuator control valves (30, 40) which control the flow of a hydraulic oil supplied to and discharged from actuators (15, 16), a s...  
WO/2018/194091A1
A hydraulic system equipped with: an electromagnetic proportional valve connected to a regulator via a secondary pressure line and connected to an auxiliary pump via a primary pressure line; an emergency line that branches from the prima...  
WO/2018/179863A1
[Problem] To provide a construction machine equipped with a hydraulic closed circuit system which can inhibit unintended operation of a hydraulic actuator and continue the operation of a machine body even when a switching valve is stuck ...  
WO/2018/178861A1
A system for detecting leaks in a hydraulic supply system for a double-acting hydraulic actuator is disclosed. The system may include a first conduit in fluid communication with a first chamber of the actuator, and with a second chamber ...  
WO/2018/179070A1
The objective of the present invention is to provide a hydraulic control system for a working machine with which it is possible to detect an abnormality in a pump output switching device irrespective of the state of the abnormality of th...  
WO/2018/178961A1
This hydraulic system comprises: a first proportional solenoid valve and a second proportional solenoid valve that, the larger the operation signal output from a first operation device and a second operation device, output a higher secon...  
WO/2018/178960A1
This hydraulic system comprises: an operation device; a control valve that, the larger the operation signal output from the operation device, increases the opening area of a passage that supplies hydraulic oil to a hydraulic actuator; a ...  
WO/2018/166984A1
The disclosure concerns a method for controlling the pressure in the chambers of a hydraulic cylinder (1) having a meter-out chamber (2) and a meter-in chamber (3). A meter-out valve (7) is connected to the meter-out chamber (2) for regu...  
WO/2018/162243A1
The invention relates to a method for activating a hydraulic actuator drive comprising an actuator, the position of which is adjusted by at least one electrohydraulic proportional valve, which has at least one electrical input and at lea...  
WO/2018/153524A1
The invention refers to an arrangement and to a method to detect an oil leakage (LKG) between a first section (S1) of a hydraulic cylinder (HC) and a second section (S2) of the hydraulic cylinder (HC). A movable piston (MP) is arranged b...  
WO/2018/131118A1
This fan drive system is provided with: a hydraulic pump; a hydraulic motor that rotates a fan on the basis of a hydraulic oil supplied from the hydraulic pump; a data acquisition unit that acquires the actual rotation speed of the fan; ...  
WO/2018/122111A1
The invention relates to an accumulator comprising: - a main cylindrical housing with a closed first axial end; - a piston arranged in the main cylindrical housing and sealed to the inner surface of the main cylindrical housing, which pi...  
WO/2018/100074A3
The invention relates to a large manipulator (1), in particular a truck-mounted concrete pump, comprising a turntable (3) that can be rotated about a vertical axis by means of a rotary drive and is arranged on a chassis (2), an articulat...  
WO/2018/097029A1
To ensure minimal hydraulic actuator operation even when one motor is inoperable while being able to conserve energy and reduce the size of a hydraulic system, this construction machinery comprises a first hydraulic drive device that is ...  
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...  
WO/2018/074952A1
The disclosure relates to an electro-hydraulic control system (1) for directing fluid to at least one hydraulic actuator (10), the system (1) comprising at least one electronic controller (3, 4); first and second pilot valves (5, 6) bein...  
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...  
WO/2018/041284A1
The invention relates to a pneumatic control system for a working cylinder, which pneumatic control system enables resistance-free manual motion of the device driven by the working cylinder in the event of a failure or switch-off of the ...  
WO/2018/034534A1
The present invention relates to a check valve for discharging air which selectively discharges air and a hydraulic fluid, and to a hydraulic actuator for a power plant, having the check valve. The check valve for discharging air accordi...  
WO/2018/034536A1
The present invention relates to a valve assembly for discharging air which selectively discharges air and a hydraulic fluid, and to a hydraulic actuator for a power plant, having the valve assembly. The valve assembly for discharging ai...  
WO/2018/015022A1
The invention relates to a hydraulic flight control actuator, comprising a piston-cylinder device, which has a piston and a cylinder, and comprising a double seal device, which has at least one primary seal (1) and at least one piston ri...  
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/2018/011560A1
A liquid-ingress control device, comprising a casing having an interior and an exterior, and optionally a liquid-activated trigger positioned in the casing interior; the casing comprising an exterior liquid entry control surface defined ...  
WO/2017/199607A1
This liquid leakage detection device comprises: a sensor section (12) for detecting liquid present between a plurality of seals (8, 9) which are axially arranged on the inner periphery of a shaft support member (7) in which a shaft (2) i...  
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/2017/186712A1
The invention relates to a hydraulic spindle comprising a cylinder which has a piston. The piston separates a first cylinder chamber from a second cylinder chamber. A pressure medium can be supplied to the piston in the retracting direct...  
WO/2017/187934A1
A monitoring device (10) has a first pressure sensor (50) that detects a first pressure value (P1) of a pressurized fluid in a first pipe (26), a second pressure sensor (52) that detects a second pressure value (P2) of a pressurized flui...  
WO/2017/178347A1
An electrohydraulic control circuit (1) for actuating a hydraulically activated drive assembly (2), by means of which a mast segment of a manipulator, in particular of a large-scale manipulator for truck-mounted concrete pumps, can be ad...  
WO/2017/175820A1
Provided is an emergency operation valve capable of alternatively switching between an open state and a closed state, wherein the emergency operation valve is configured so as to be provided with a valve box having a hollow valve chamber...  
WO/2017/175849A1
An air cylinder 50 is provided with a cylindrical cylinder 52 and a piston 51 that is moved by the pressure of a fluid fed to chambers 56, 57 disposed within the cylinder 52. A monitoring device 1 is provided with a heat flux sensor 10 a...  
WO/2017/175862A1
Provided is a crane that is capable of protecting a hydraulic cylinder by suppressing operation of the hydraulic cylinder when the hydraulic cylinder is in poor connection with a hydraulic circuit. A crane (1) provided with a derricking ...  
WO/2017/176568A1
The present disclosure relates to an electronic control system for pneumatic grips, using proportional air pressure control, as employed in the field of materials testing. The disclosed embodiments allow for variable gripping pressure th...  
WO/2017/171022A1
Provided is a failure detection device which is capable of automatically detecting failure of a hydraulic pilot circuit following a normal lever operation. The failure detection device is for a pilot circuit provided with: a pilot pressu...  
WO/2017/171021A1
Provided are: a hydraulic system which exhibits excellent safety, and which is capable of slowly driving an actuator during emergency operation; and an emergency operation method. This hydraulic system is provided with: a hydraulic pump;...  
WO/2017/167435A1
A control device is disclosed for at least one hydraulic working section (A, B), which can be connected to a pressure supply source (P) and a return flow (T) via a hydraulic supply circuit and a control valve (34) supplied with a pilot p...  
WO/2017/164371A1
Provided is a hydraulic system with which an operator can safely perform work during an emergency operation even in the event that an electromagnetic proportional valve has failed. This hydraulic system is provided with a hydraulic pump,...  
WO/2017/164370A1
Provided is a failure diagnosis device with which failure of an unloading circuit of a hydraulic system can be reliably discovered. The unloading circuit is provided with a pump oil passage that connects a hydraulic pump and a directiona...  
WO/2017/130404A1
The purpose of the present invention is to provide a spool valve device for a pneumatic cylinder, which is capable of adjusting the dead band during switching back and forth between an extension direction operation and retraction directi...  
WO/2017/129293A1
The invention relates to a hydraulic cylinder unit (1) having a hydraulic cylinder (2), a piston (3) which can be moved in the hydraulic cylinder (2), and a servo valve (7). The piston (3) separates working volumes (5A, 5B) of the hydrau...  
WO/2017/125247A1
The invention relates to a safety controller, which serves the purpose of the quick pressure relief of a hydraulic load, comprising at least one pair of control valves, which can be connected to each other in a fluid-conducting manner, c...  
WO/2017/125121A1
A circuit arrangement for at least one fluidic actuator (11) having a piston-rod unit (14) guided so as to be longitudinally movable in a housing (8), which unit divides the housing (8) into two working spaces (16, 18), which are each as...  
WO/2017/110177A1
According to the present invention, a back pressure control valve (40) is provided with: a switching valve (50) which opens/closes a connection path (13); and an emergency operation valve (60) which is provided to a branched path (14) an...  
WO/2017/110167A1
The present invention can achieve energy conservation by carrying out recycle control even when an abnormality occurs in a pressure sensor of a hydraulic actuator. The present invention is provided with: a hydraulic pump (41b) that suppl...  
WO/2017/112720A1
Apparatus for independently controlling the seating force in a rotary valve are described herein. An example apparatus includes a rotary valve having a flow control member and a dual-acting actuator operatively coupled to the rotary valv...  
WO/2017/091892A1
An apparatus for cutting involves a support configured to stably support the apparatus on a surface, an articulated boom rotatably mounted on the support proximate a first end of the boom, and a hydraulically operated end effector mounte...  
WO/2017/079792A1
A piston and cylinder system (10), the cylinder (12) including a closed end (14) and an open end (16). The piston (18) is movable in an axial direction within the cylinder (12) between a fully extended position and a fully retracted posi...  
WO/2017/077343A1
A valve system comprising: a first channel and a second channel in a parallel arrangement, each channel having an upstream end and a downstream end; an inlet valve arrangement connected to the upstream ends of the channels and configured...  
WO/2017/077786A1
This liquid leak detection device is configured by being provided with: a sliding member (S), which has an elastic section (10) and which slides on the outer circumference of a rod (2) that is capable of moving in the axial direction wit...  
WO/2017/071584A1
An axle-locking hydraulic system of a two-way driving shuttle vehicle, comprising an axle-locking fluid tank (11), an axle-locking circuit, an axle-locking solenoid reversing valve (21), and a burst pipe emergency apparatus. The axle-loc...  

Matches 1 - 50 out of 3,038